Formation fluid sample container apparatus

A downhole tool includes a body including an opening and a cavity extending into the body from the opening. A sample container is fixed in the cavity and includes an elongated container for holding a formation fluid sample and a sheath coupled to an outer surface of the elongated container and at least partially surrounding the elongated container.

BACKGROUND OF THE DISCLOSURE

To sample and test fluids such as deposits of hydrocarbons and other desirable materials trapped in underground formations, a wellbore is drilled by connecting a drill bit to the lower end of a series of coupled sections of tubular pipe known as a drillstring. A downhole sampling tool may be deployed in the wellbore drilled through the formations. The downhole sampling tool may include a fluid communication device, such as a probe or a straddle packer to establish fluid communication between the downhole sampling tool and a formation penetrated by the wellbore.

Fluid samples may be extracted from the formation via the fluid communication device using a fluid pump provided with the downhole sampling tool. Various downhole sampling tools for wireline and/or while-drilling applications are known in the art such as those described in U.S. Pat. Nos. 6,964,301, 7,543,659, 7,594,541, and 7,600,420. The entireties of these patents are hereby incorporated herein.

Sampling tools may be provided with a plurality of sample bottles to receive and retain the fluid samples. Sample bottles include, for example, those described in U.S. Pat. Nos. 6,467,544, 7,367,394, and 7,546,885, the entireties of which are incorporated herein by reference.

DETAILED DESCRIPTION

In one or more aspects, the present disclosure describes apparatus that may facilitate incorporating variable number of sample bottles to a downhole sampling tool, for example a sampling-while-drilling (SWD) tool. In some examples, the downhole sampling tool is to capture samples of formation fluid into relatively few sample bottles. In other examples, the downhole sampling tool is to capture samples of formation fluid into a relatively large number of sample bottles. Therefore, it may be useful to variably extend the string of sample bottles incorporated to a downhole sampling tool.

In one or more aspects, the present disclosure describes apparatus that may facilitate securing sample bottles to a downhole sampling tool, for example an SWD tool. Once sample bottles have been incorporated to the downhole sampling tool at the Earth's surface, the downhole sampling tool is lowered into a wellbore penetrating subterranean formations. The downhole sampling tool may be used to collect samples of formation fluid into one or more of the sample bottles. In some examples, the wellbore is further extended through subterranean formations prior to and/or after collecting fluid samples. Therefore, it may be useful to secure the sample bottles in a way that is likely to endure the harsh environment encountered during drilling and/or tripping.

In one or more aspects, the present disclosure describes apparatus that may facilitate handling formation fluid samples retained in sample bottles of a downhole sampling tool, for example an SWD tool. Once the downhole sampling tool has been retrieved to the Earth's surface, the fluid samples retained in the sample bottles may be positively sealed within the sample bottles using, for example, a manually activated valve. The sample bottles may then be detached or removed from at least a portion of the downhole sampling tool to, for example, be transported to a remote laboratory where the fluid samples retained in the sample bottles may be analyzed. The fluid samples retained in the sample bottles may alternatively be transferred to another container, vessel or analyzer chamber while the sample bottles are still incorporated to the downhole sampling tool. In that case, access to the sample bottles may be provided while the sample bottles are still incorporated to the sampling tool to, for example, positively seal and/or transfer the retained fluid samples, among other purposes. Alternatively or additionally, the sample bottles may be provided with self-closing devices that are actuated upon detaching or removing the sample bottles from a downhole sampling tool.

FIG. 1is a schematic view of a well site according to one or more aspects of the present disclosure. The well site may be situated onshore (as shown) or offshore. The well site includes platform and derrick assembly110positioned over a wellbore111. The platform and derrick assembly110is to extend the wellbore111through subterranean formations.

The platform and derrick assembly110is to suspend a drill string112within the wellbore111. For example, the assembly110includes a rotary table116, a kelly117, a hook118and a rotary swivel119. The hook118is attached to a traveling block (not shown) of the platform and derrick assembly110. The drill string112is suspended from the hook118through the kelly117and the rotary swivel119. Rotation of the drill string112relative to the hook118is permitted through the rotary swivel119. The drill string112may be rotated by the rotary table116, which is itself operated by well known means not shown. The rotary table116engages the kelly117at the upper end of the drill string112. As is well known, a top drive system may alternatively be used instead of the kelly117and the rotary table116to rotate the drill string112from the surface.

The wellbore111may be extended through subsurface formations using the platform and derrick assembly110and the drill string112. The drill string112includes a bottom hole assembly (BHA)100proximate the lower end thereof. The BHA100includes a drill bit105at its lower end powered by a hydraulically operated motor150. The platform and derrick assembly110further includes drilling fluid or mud126stored in a tank or pit127formed at the well site. Drilling fluids or mud may be pumped down through a central bore of the drill string112and exit through ports located at the drill bit105. The drilling fluids act to lubricate and cool the drill bit105, to carry cuttings back to the surface, and to establish sufficient hydrostatic head to prevent formation fluids from blowing out the wellbore111once they are reached. A pump129delivers the drilling fluid126to an interior passage of the drill string112via a port in the swivel119, thereby causing the drilling fluid126to flow downwardly through the drill string112as indicated by the directional arrow108. The drilling fluid126actuates the motor150, which rotates the bit105. The drilling fluid126exits the drill string112via water courses, or nozzles (jets) in the drill bit105, and then circulates upwardly through the annulus region between the outside of the drill string and the wall of the wellbore111as indicated by the directional arrows109. In this well-known manner, the drilling fluid126lubricates the drill bit105and carries formation cuttings up to the surface, where the drilling fluid126may be cleaned and returned to the pit127for recirculation.

The BHA100is to acquire and transmit information about the trajectory of the wellbore111. For example, the BHA100includes a measuring-while-drilling (MWD) tool130. The MWD tool130may be housed in a special type of drill collar, as is known in the art, and may contain one or more devices for measuring characteristics of the drill string112and the drill bit105. For example, the MWD tool130may include one or more of the following types of measuring devices: a weight-on-bit measuring device, a torque measuring device, a vibration measuring device, a shock measuring device, a stick slip measuring device, a direction measuring device, and an inclination measuring device. Optionally, the MWD tool130may further comprise an annular pressure sensor and/or a natural gamma ray sensor. The MWD tool130may also include capabilities for measuring, processing, and storing information, as well as for communicating with a logging and control unit160. For example, the MWD tool130and the logging and control unit160may communicate information in two directions (i.e., uphole via uplinks and/or downhole via downlinks) using systems sometimes referred to as mud pulse telemetry (MPT) and/or wired drill pipe (WDP) telemetry. In some cases, the logging and control unit160may include a controller having an interface to receive commands from a human operator. The commands may be broadcast to the BHA100via the MWD tool130.

The BHA100is also to acquire and optionally transmit information about the subterranean formations penetrated by the wellbore111. For example, the BHA100further includes a sampling-while-drilling (SWD) tool120and a logging-while-drilling (LWD) tool120A. The SWD tool120and the LWD tool120A may also be housed in a special type of drill collar, as is known in the art, and may contain one or a plurality of known types of well logging instruments. For example, the LWD tool120A comprises one or more of a nuclear magnetic resonance measuring device, a resistivity measuring device, a neutron or gamma-ray measuring device, etc. The SWD tool120comprises a fluid communication device (not shown) to extend from the drill string112and establish fluid communication with a subterranean formation penetrated by the wellbore111in which the drill string112is positioned. The SWD tool120and the LWD tool120A may include capabilities for measuring, processing, and storing information, as well as for communicating with the MWD tool130. It is understood that more than one LWD tool or SWD tool may be employed within the scope of the present disclosure.

FIG. 2is a schematic view of a sampling-while-drilling tool210according to one or more aspects of the present disclosure. The SWD tool210is positioned in a wellbore240extending through subterranean formations, such as formation250. The SWD tool210is to acquire samples of formation fluid254and retain at least some of the samples in sample bottles220and222.

The SWD tool210may be provided with a stabilizer that may include one or more blades258to engage a wall260of the wellbore240. The SWD tool210may be provided with a plurality of backup pistons262to assist in applying a force to push and/or move the SWD tool210against the wall260of the wellbore240. A fluid communication device, such as a probe252, may extend from the stabilizer blade258of the SWD tool210. The fluid communication device may be implemented with a guarded or focused fluid admitting assembly, for example, as shown in U.S. Pat. No. 6,964,301. The fluid communication device is to seal off or isolate selected portions of the wall260of the wellbore240and to fluidly couple the SWD tool210to the adjacent formation250. While the SWD tool210is depicted as having one fluid communication device, a plurality of fluid communication devices may alternatively be provided on the SWD tool210.

Once the fluid communication device252fluidly couples to the formation250, various measurements may be conducted on the formation250, for example, a pressure parameter may be measured by performing a pretest in a manner known in the art. Also, a pump275may be used to draw the formation fluid254from the formation250into the SWD tool210in a direction generally indicated by arrows256. The SWD tool210includes a fluid sensing unit270to measure properties of the fluid samples extracted from the formation250. The fluid sensing unit270may include any combination of conventional and/or future-developed spectral analysis systems.

The fluid drawn from the formation250into the SWD tool210may be expelled through an exit port into the wellbore240or may be sent to one or more of the sample bottles220and222, which receive and retain the formation fluid for subsequent testing at the surface or a testing facility. More or less than two sample bottles may be employed.

The SWD tool210comprises a downhole control system280, which may include a processor or processing unit to execute software commands or instructions stored on a memory and/or any tangible computer readable medium. For example, the downhole control system280may control the extraction of fluid samples from the formation250by controlling the pumping rate of the pump275. The downhole control system280may also be used to analyze and/or process data obtained, for example, from the fluid sensing unit270or other downhole sensors (not shown), store and/or communicate measurement or processed data to the surface for subsequent analysis.

FIGS. 3 and 3Aare schematic views of an example sample bottle310according to one or more aspects of the present disclosure. The sample bottle310is to be incorporated into a downhole sampling tool320A. The sample bottle310may be used to receive and retain samples of formation fluid.

The sample bottle310comprises an elongated container330. The container330may be made of corrosion and pressure resistant material such as a nickel based alloy. The container330is to receive fluid samples through an inlet331. As shown, the inlet331includes a flowline332extending from the container330through a stabber370, which is depicted in this example as right angle stabber. The flowline332may be closed via a manual shut-in valve361, which is accessible via a closable access port360. Thus, a sample of formation fluid retained in the container300may be positively sealed. Also, pressure trapped in the flowline322, for example after closing the shut-in valve361, may be released via a vent plug364, which is also accessible via a closable access port365.

A sliding piston325is disposed within the elongated container330defines a variable volume chamber326to receive the sample of formation fluid. Optionally, an agitator320may be included in the chamber326. The agitator320may be used to mix or recombine the sample of formation fluid present in the chamber326. The backside of the piston325may be exposed to wellbore fluid or other fluid entering the container330via a passage380.

The sample bottle310comprises a sleeve or sheath300, such as cylindrical blind cap, sized to engage an outer surface of the elongated container330. For example, the elongated container330may be inserted into the sleeve or sheath300prior to the installation of the stabber370and the closing devices of the ports360and365. Additionally, a spring pack340may be compressed by screwing a jam nut350into the sleeve or sheath300, thereby maintaining the position of the elongated container330inside the sleeve or sheath. The jam nut350may optionally be provided with a filter355to allow wellbore fluid or other fluid to enter the container330via the passage380.

The sheath300is made of scratch and impact resistant material such as stainless steel. For example, the stainless steel may be selected to be electrochemically compatible with the material making the cavity into which the sample bottle310is secured. The sheath300may contribute to preventing the elongated container330from impacting or dragging against the wall of a wellbore322A in which the downhole sampling tool is positioned and/or against other formation debris present in the wellbore322A. The sheath300may thus assist in maintaining the mechanical integrity of the elongated container330, for example the capability of the elongated container330to hold high pressure fluid samples.

The sample bottle310is to couple to a cavity324A extending from an opening326A in the body of the downhole sampling tool320A, such as a collar having a passage390A to conduct drilling mud. For example, the sample bottle310may be inserted into the cavity324A through the opening326A. Upon insertion, the elongated container330may fluidly couple to a flowline340A. Thus, the sample bottle310may be in selectable fluid communication with a subterranean formation penetrated by the wellbore322A via a fluid communication device (e.g. a probe). The sample bottle310is further secured into the cavity324A via roll pins350A and352A extending through holes in the sheath300and in the body of the downhole sampling tool320A.

FIGS. 4 and 4Aare schematic views of an example sample bottle410according to one or more aspects of the present disclosure. The sample bottle410is to be incorporated into a downhole sampling tool420A. The sample bottle410may be used to receive and retain samples of formation fluid.

The sample bottle410comprises an elongated container430, an inline stabber470, and a shut-in valve461that may be structurally and/or functionally similar to the elongated container330, the right angle stabber370and the shut-in valve361shown inFIG. 3. Further, the sample bottle410comprises a piston425, an agitator420, and a passage480that may also be structurally and/or functionally similar to the piston325, the agitator320, and the passage380shown inFIG. 3.

The sample bottle410comprises a sleeve or sheath400. The sleeve400may be made of polymeric material such as polyether ether-ketone, polyether ketone, fluorocarbon polymer, nitrile butadiene rubber, or epoxy resin. The sleeve400may be molded over an outer surface of the elongated container430. The sleeve may be shrink or slip fitted around the elongated container430. The sleeve400is sized to leave ends490and495of the sample bottle410uncovered to enable access to a manual valve455and/or to the shut-in valve461.

The sample bottle410is to couple to a cavity424A extending from an opening426A in the body of the downhole sampling tool420A, such as a collar having a passage490A to conduct drilling mud. For example, the sample bottle410may be inserted into the cavity424A through the opening426A. Upon insertion, the elongated container430may fluidly couple to a flowline440A. Thus, the sample bottle410may be in selectable fluid communication with a subterranean formation penetrated by a wellbore422A via a fluid communication device (e.g. a probe).

The sample bottle410is further secured in the cavity424A with a spacer or axial loading device470A, such as a pneumatic jack or other devices shown in U.S. Pat. No. 7,367,394. In addition, the sheath400is sized to snuggly fit into (e.g., via a slight interference fit within) the cavity424A. Therefore, the sheath400may further assist in securing the sample bottle410in the cavity424A. Also, contact between the sheath400and the wall of the cavity424A may permit reducing or attenuating the magnitude of flexural or lateral movements of the elongated container430in the cavity424A. Undesired flexural or lateral movements of the elongated container430may be generated, for example, by impacts of the downhole sampling tool420A against the wall of a wellbore422A in which the downhole sampling tool is positioned. Reducing the magnitude of the flexural movements of the elongated container430may contribute to maintaining the mechanical integrity of the elongated container430, for example by limiting fatigue and cracking of the elongated container430. Reducing the magnitude of the flexural movements of the elongated container430may also contribute to maintaining the hydraulic integrity of O-rings provided with the stabber470, among other seals provided with the sample bottle410.

FIGS. 5, 6 and 7are schematic views of portions of example sample bottles according to one or more aspects of the present disclosure. Sample bottles510,610and710include respective elongated container530,630and730and respective sheaths500,600and700. The sheaths500,600and700comprise features that may be used alone or in combination.

For example, the sheath500comprises flanges or ears520protruding away from the center of the sheath. The flanges or ears520are to secure the sample bottle510to a downhole sampling tool when the sample bottle510is coupled to a cavity of the downhole tool. The flanges or ears520may include one or more holes540positioned and sized to receive a screw therethrough.

In another example, the sheath600comprises a layer portion640and a cover portion620that is affixed to the layer640. For example, the layer640may be made of polymeric material such as polyether ether-ketone, polyether ketone, fluorocarbon polymer, nitrile butadiene rubber or epoxy resin. The cover portion620may be made of scratch and impact resistant material, such as stainless steel. The stainless steel may be selected to be electrochemically compatible with the material making the cavity into which the sample bottle610is secured. The cover portion620may be positioned over a portion of the opening from which the cavity extends.

In yet another example, the sheath700comprises a boss720. The boss720may be to engage a corresponding recess in the cavity into which the sample bottle710is secured. Referring back toFIG. 3A, a boss354A similar to the boss720is shown. The boss354A may assist in taking the mechanical load off the right angle stabber370. Taking the mechanical load off the right angle stabber370may contribute to maintaining the hydraulic integrity of O-rings provided with the stabber370, among other seals provided with the sample bottle310.

FIGS. 8 and 9are schematic views of portions of example sampling tools according to one or more aspects of the present disclosure. Each sampling tool comprises a body820or920(e.g., a collar, a mandrel holder, a housing) having an outer surface, respectively outer surface822or922. The outer surfaces822and922comprise openings826and926extending into cavities824and924in the bodies820and920, respectively. The sampling tools also comprise sample bottles810and910to receive and retain fluid samples extracted from a subterranean formation penetrated by a wellbore in which the downhole sampling tool is positioned. For example, the sample bottles810and910may be in selective fluid communication with the subterranean formation via a fluid communication device (not shown) of the sampling tool. In some cases, the sampling tools may also include a passage to conduct drilling mud such as shown with passages860and960.

The sample bottles810and910comprise respective sheaths,800or900engaging outer surfaces of elongated containers830or930, respectively. The sheaths800and900are to couple to the cavities824and924, respectively. For example, the sheath800is secured to the body820using one or more screws850. In another example, the sheath900comprises a wedged cross section to slide into a dovetail section of the cavity924. Optionally the sheaths800or900may include a cover (not shown) affixed thereto. The cover may be positioned over at least a portion of the opening826or926.

FIG. 10is a schematic view of a portion of an example sampling tool according to one or more aspects of the present disclosure. Similar toFIG. 2, the sampling tool ofFIG. 10comprises a fluid communication device to extend from the sampling tool and establish fluid communication with a subterranean formation penetrated by a wellbore in which the sampling tool is positioned.

The sampling tool comprises a body1020(e.g., a collar, a mandrel holder, a housing) having an outer surface1022. The outer surface1022comprises an opening1026extending into a cavity1024in the body1020of the sampling tool. The sampling tool also comprises a sample bottle1010coupled within the cavity1024and in selectable fluid communication with the formation via the fluid communication device. The sampling tool may also include a passage to conduct drilling mud, for example as shown with passage1060.

A ring1050is to engage a perimeter of the body1020of the sampling tool, for example a cylindrical portion of the outer surface1022. Also, the ring1050is to engage an outer surface of the sample bottle1010. Thus, the ring1050may contribute to securing the sample bottle1010within the cavity1024. Also, the contact between the sample bottle1010and the ring1050may permit reducing or attenuating the magnitude of flexural or lateral movements of the sample bottle1010in the cavity1024. The ring1050may comprise, for example, a wear band or a drill string stabilizer positionable over at least a portion of the cavity1024.

The opening1026into the cavity1024and the ring1050may provide access to components of the sample bottle1010. Referring back toFIG. 4A, a ring452A similar to the ring1050is shown. The cavity424A and the ring452A are to permit access to the shut-in valve461. The shut-in valve461is to positively seal the fluid samples retained in the sample bottle410, for example by manually closing the valve461once the downhole sampling tool has been retrieved to the Earth's surface. The sample bottle410may then be safely detached or removed from the cavity424A.

Returning toFIG. 10, the sample bottle1010may comprise an inner metallic container1030to hold pressurized formation fluid and an outer polymeric sheath1000. However, other material combinations may be used within the scope of the present disclosure.

FIGS. 11, 12 and 13are schematic views of portions of example sampling tools according to one or more aspects of the present disclosure. Similar toFIG. 2, the sampling tools comprise one or more fluid communication devices (e.g., probes) to extend from the sampling tools and to establish fluid communication with a subterranean formation penetrated by a wellbore in which any of the sampling tools are positioned.

Each sampling tool comprises a body1120,1220or1320(e.g., a collar, a mandrel holder, a housing) having an outer surface, respectively outer surface1122,1222or1322. The outer surfaces1122,1222and1322comprise openings1126,1226and1326extending into cavities1124,1224, and1324in the bodies1120,1220and1320, respectively. The sampling tools also comprise sample bottles1110,1210and1310to receive and retain fluid samples extracted from a subterranean formation. For example, the sample bottles1110,1210and1310may be in selective fluid communication with the subterranean formation via a fluid communication device (not shown) of the sampling tools. In some cases, the sampling tools may also include a passage to conduct drilling mud, as shown with passages1160,1260and1360.

Each sample bottle1110,1210or1310is secured in a cavity, respectively the cavity1124,1224or1324, with braces. The braces are removably coupled to the outer surface (1122,1222or1322) of the sampling tool at opposing sides of the cavity. The braces may relieve some of the load generated by the pressure of the fluid inside the sample bottle. The braces may alternatively or additionally permit reducing or attenuating the magnitude of flexural or lateral movements of the sample bottle in the cavity when such movements are generated, for example, during drilling of a wellbore.

For example, the braces may include one or more roll pins, such as the roll pin1150shown inFIG. 11. The roll pin is inserted into a hole provided in the sample bottle1110. The hole is located in a sheath1100engaging an outer surface of an elongated container1130of the sample bottle1110. Thus, the capability of the elongated container1130, and of the sample bottle1110as a whole, to hold high pressure fluid samples may not be compromised by the presence of the hole in the sample bottle1110. The roll pin also engages the body1120at opposing sides of the cavity1124, thereby maintaining the sample bottle in contact with the surface of the cavity. While one roll pin1150is shown inFIG. 11, a plurality of roll pins may be provided, for example spread along the length of the elongated container1130. The roll pin1150is coupled to the outer surface1122of the body to enable the roll pin1150to be easily accessed when inserting the sample bottle1110into and or removing the sample bottle1110from the cavity1124.

In another example, the braces include a mesh portion, such as the mesh1250shown inFIG. 12. The mesh1250is coupled to the outer surface1220of the sampling tool at opposing sides of the cavity1224with a plurality of screws1252. The mesh1250is to engage an outer surface of the sample chamber1210. Thus, the mesh1250may contribute to securing the sample bottle1210inside the cavity1226by covering at least a portion of the opening1226. The mesh1250may be easily removed from the opening1226during servicing of the sample bottle1210.

In yet another example, the braces include one or more clamps, such as clamps1350shown inFIG. 13. The clamps1350are coupled to the outer surface1322of the body1320at opposing sides of the cavity1324. For example, one side of a clamp may be coupled to the body1320via a spindle1352, while the other side of the clamp1350may be coupled to the body1320via a screw1354. The clamps1350may include saddle clamps. The clamps1350are to engage an outer surface of the sample chamber1310. The clamps1350may be easily removed from the opening1326during servicing of the sample bottle1210.

The example braces ofFIGS. 11, 12 and 13may be combined. For example, a bracing system may include meshes interleaved with clamps or roll pins. As the openings1126,1226and1326may be partially exposed to the wellbore in which the sampling tool is positioned, it may be useful to utilize sample bottles having an inner elongated cylinder protected with an outer sheath, as described herein. For example, the cylinder may be made of nickel alloy and the sheath may be made of polymer, among other material combinations.

As apparent inFIGS. 11, 12 and 13, the opening1126,1226and1326and the braces are to provide access to the sample bottles1110,1210and1310, even when all or at least some of the braces are coupled to the tool bodies1120,1220and1320. Therefore, a human operator may positively secure a fluid sample in the bottles1110,1210and1310by accessing and actuating a manual valve of the sample bottle prior to disengaging the braces1150,1250or1350. Also, the human operator may vent pressure trapped in sampling tool flowline by accessing and opening a vent plug of the sample bottle prior to disengaging the braces1150,1250or1350. Thus, the braces1150,1250or1350may provide protection against high pressure hazard during servicing of the sample bottles in a case where the vent plugs are accessible while the bottles1110,1210and1310are secured by the braces1150,1250and1350, respectively.

FIGS. 14 and 15are schematic views of portions of example sampling tools according to one or more aspects of the present disclosure. Similar toFIG. 2, the sampling tools comprise one or more fluid communication devices (e.g., probes) to extend from the sampling tools and to establish fluid communication with a subterranean formation penetrated by a wellbore in which any of the sampling tools are positioned.

Each sampling tool comprises a body1420or1520(e.g., a collar, a mandrel holder, a housing) having an outer surface. The outer surface comprises an opening, extending into a cavity in the body. The sampling tools also comprise sample bottles1410and1510positioned in the cavities and to receive and retain fluid samples extracted from a subterranean formation. For example, the sample bottles1410and1510may be in selective fluid communication with the subterranean formation via flowlines1440and1540, respectively. In some cases, the sampling tools may also include a passage (not shown) to conduct drilling mud.

The sample bottles1410and1510include elongated containers (not shown separately) to receive the fluid sample. The sample bottles also include magnets1450,1550aand/or1550bmechanically coupled to the elongated container. For example, the magnets1450,1550aand/or1550bmay be embedded into a polymeric sheath or sleeve surrounding the elongated containers. The magnet (or series of magnets)1450may be positioned on a side of the sample bottle1410between the ends of the elongated container. The magnets1550aand1550bare positioned at the end of the elongated container.

The sampling tools also include magnets1452,1552a, and/or1552bdisposed proximate to the cavities and to attract the magnets1450,1550aand/or1550b, respectively. For example, the pairs of magnets1450and1452,1550aand1552a, and1550band1552bare adjacent, and the polarities of the magnet pairs are arranged to provide attractive coupling. Thus, the sample bottle1410may be laterally secured within its cavity, and/or the sample bottle1510may be axially secured within its cavity. Alternatively, the configurations ofFIGS. 14 and 15may be combined.

The magnets1450,1550aand/or1550bmay be made of magnetic material. The magnets1452,1552a, and/or1552bmay be electro-magnets or may be made of permanent magnetic material.

When a plurality of electro-magnets1452is used, the electromagnets may be used to sense a position of a sliding piston disposed within the elongated container of the sample bottle1410, for example using the Hall Effect.

FIG. 16is a schematic view of a portion of an example sampling tool according to one or more aspects of the present disclosure. Similar toFIG. 2, the sampling tool comprises a fluid communication device (e.g., a probe) to extend from the sampling tool and establish fluid communication with a subterranean formation penetrated by a wellbore in which the sampling tool is positioned.

The sampling tool comprises a body (e.g., a collar, a mandrel holder, a housing) comprising two parts1620aand1620bto releasably couple and decouple. For example, the parts1620aand1620bmay include box and pin portions of a threaded connection. When coupled, the parts1620aand1620bcooperate to form a passage to conduct drilling mud, for example as shown with the passage1660.

The part1620adefines an outer surface1622ahaving an opening1626aextending into at least one cavity1624ain the part1620aof the body of the sampling tool. While only one cavity is depicted inFIG. 16, the sampling tool may include a plurality of cylindrical cavities arranged around the perimeter of the body part1620asimilar to the examples shown inFIGS. 12 and 13. The cavity1624amay receive a sample bottle1610coupled within the cavity1624aand in selectable fluid communication with the formation via a flowline1640and the fluid communication device.

The part1620bdefines an outer surface1622bhaving an opening1626bextending into a cavity1624bin the part1620bof the body of the sampling tool. The opening1626bis positioned to register with the sample bottle1610upon coupling of the parts1620aand1620b. The cavity1624bis shaped to permit threading of parts1620aand1620bwhen the sample bottle1610is located within the cavity1624a. For example, the cavity1624bmay be a substantially annular cavity. The cavity1624bis sized to receive a loading assembly1670. The loading assembly may include an annular spring stack and thrust bearings. The loading assembly may be used to compress the sample bottle1610when the parts1620aand1620bare coupled.

The parts1620aand1620bcomprise protuberances1654aand1654bextending from the outer surfaces1622aand1622b, respectively. The protuberances1654aand1654bare to engage the sample bottle1610upon coupling of part1620aand1620b. Thus, the sample bottle1610may be radially secured within the cavities1624aand1624b. For example, the protuberances1654aand/or1564bmay comprise a web spanning over the openings1626aand1626b, respectively. Alternatively, the protuberances1654aand/or1654bmay comprise a boss extending partially over the openings the openings1626aand1626b, respectively. The protuberances1654aand/or1654bmay be integral to the parts1620aand1620bof the body of the sampling tool. The protuberances1654aand1654bmay assist in securing the sample bottle1610within the cavities1624aand1624b. Since the sample bottle1610may be exposed to the wellbore in which the sampling tool is lowered, the sample bottle1610may comprise an inner container1630and an outer sheath1600. For example, the inner container1630may include a metallic cylinder and the outer sheath1600may include a polymeric sleeve, among other material combinations.

Thus, upon coupling the parts1620aand1620bat the Earth's surface, the sample bottle1610is incorporated to the downhole sampling tool. After the downhole sampling tool is utilized to obtain samples of formation fluids and retrieved to the Earth's surface, the fluid sample retained in the sample bottle1610is positively sealed within the sample bottle1610, for example by manually closing a shut-in valve1680. As shown, the opening1626aand the protuberance1654aare to leave access to a portion of the sample bottle1610, such as access to the valve1680. Additionally, access to a vent plug (not shown) may be provided. Parts1620aand1620bare decoupled and the sample bottle1610may then be detached or removed from the downhole sampling tool.

FIGS. 17, 18 and 19are schematic views of portions of example sampling tools according to one or more aspects of the present disclosure. Similar toFIG. 2, the sampling tools comprise one or more fluid communication devices (e.g., probes) to extend from the sampling tools and to establish fluid communication with a subterranean formation penetrated by a wellbore in which any of the sampling tools are positioned.

Each sampling tool comprises a body1720,1820or1920(e.g., a collar, a mandrel holder, a housing) having an outer surface1722,1822, or1922, respectively. The outer surfaces1722,1822, or1922comprise openings1726,1826and1926, extending into cavities1724,1824and1924in the bodies1720,1820and1920, respectively. The sampling tools also comprise sample bottles1710,1810and1910positioned in the cavities1724,1824and1924, and to receive and retain fluid samples extracted from a subterranean formation. For example, the sample bottles1710,1810and1910may be in selective fluid communication with the subterranean formation via flowlines1740,1840and1940, respectively. In some cases, the sampling tools may also include a passage (not shown) to conduct drilling mud.

Each cavity1724,1824and1924comprises a threaded surface1754,1854, and1954, respectively. Each sample bottle1710,1810and1910comprises an elongated container to receive a fluid sample (not shown separately), and a retainer coupled to the container, respectively retainers1750,1850and1950. Each retainer1750,1850and1950comprises a threaded surface1752,1852, and1952, respectively. Each threaded surface of the retainer is to engage the corresponding threaded surface of the cavity1754,1854, and1954, respectively. Thus, the retainers1750,1850and1950may contribute to securing each of the sample bottles1710,1810and1910within its corresponding cavity, respectively cavities1724,1824and1924.

For example, the retainer of the sample bottle1710comprises a turn-buckle style nut1750having a threaded surface1752. The retainer is coupled to one end of the sample bottle1710via a tongue1758. The tongue1758is coupled to the turn-buckle style nut1750and to engage a groove1756located on an outer surface of the sample bottle1710. As shown, the turn-buckle style nut1750may be used to hold the sample bottle1710in tension within the cavity1724. For example, once the sample bottle1710is positioned in the cavity1724through the aperture1726, a hook1730is secured to the body1720of the sampling tool via a pin, key or screw1732. The hook1730further comprises a hook tongue1734that is inserted into a hook groove1736of the sample bottle1710. The retainer1750is then threaded to the body1720of the sampling tool, until sufficient tension is applied to the sample bottle1710. The tension applied to the sample bottle1710may permit securing the sample bottle1710even when the temperature of the sample bottle1710increases to temperature levels encountered in wellbores, and the temperature level causes the sample bottle1710to expand thermally. The tension applied to the sample bottle1710may also permit securing the sample bottle1710even when the sample bottle1710retain a highly pressurized fluid sample and the pressure level causes the sample bottle1710to extend elastically. However, the configuration ofFIG. 17may be modified to have the retainer1750hold the sample bottle1710in compression within the cavity1724.

In another example, the retainer of the sample bottle1810comprises the screw1850having the threaded surface1852. The screw1850is integral to the sample bottle1810and has an outer diameter larger than an outer diameter of the sample bottle1810. As shown, the sample bottle1810may be inserted vertically into the cylindrical cavity1824. The screw1850is then threaded to the body1820of the sampling tool. An opposite end1832of the sample bottle1810abuts a receiving surface1834of the cavity1824. Threading may continue until sufficient compression is applied to the sample bottle1810to permit securing the sample bottle1810in the cavity1824.

In yet another example, the retainer of the sample bottle1910comprises a threaded nose1950, a sectional view of which is shown inFIG. 19A. The nose1950has a substantially cylindrical shape. The nose1950comprises a passage to receive a stabber. The stabber provides fluid communication between the elongated container of the sample bottle1910and the flowline1940. The sample bottle1910is inserted into the cavity1924through the opening1926, and is threaded to the body1920of the sampling tool. An anti-rotation device1932is used to maintain the threaded connection between the sample bottle1910and the body1920during operation of the sampling tool. Also, a ring1930may be provided to further assist in securing the sample bottle1910within the cavity1924, for example similar to the description ofFIG. 10. Also, the sample bottle1910may include an outer polymeric sheath. An outer surface of the sheath may engage an inner surface of the cavity1924, for example similar to the description ofFIG. 4.

FIG. 20is a schematic view of a portion of an example sampling tool according to one or more aspects of the present disclosure. Similar toFIG. 2, the sampling tool comprises one or more fluid communication devices (e.g., probes) to extend from the sampling tool and to establish fluid communication with a subterranean formation penetrated by a wellbore in which any of the sampling tool is positioned.

The sampling tool may be included in a drill string. For example, the sampling tool comprises collars2010having a passage2090to conduct drilling mud as illustrated by the arrows. Mandrel holders2030are positionable within the collars2010. The mandrel holders2030are to receive at least one sample bottle, such as sample bottles2060. It is noted that the mandrel holders2030may include more than one sample bottle, and that mandrel holders2030may include sample bottles of different types. Thus, the mandrel holders2030may permit incorporation of a variable number of sample bottles to the downhole sampling tool. For example, the mandrel holders2030may comprise a manifold2045to provide selective fluid communication between each one of the plurality of sample bottles2060and the formation.

The mandrel holders2030include at least one connecting end that is to be releasably coupled to a connection sub2050. The connection sub2050is coupled to the collar2010via threaded connectors2012and2016. The passage2090extends through the connection sub2050, as indicated by the arrows, thereby permitting the conduction of drilling mud across the sampling tool.

During connection, fluid and/or electrical communication are established between the mandrel holders2030and the connection sub2050. Thus, after connection between the mandrel holders2030and the connection sub2050, the sample bottles2060are in selectable fluid communication with the formation via the fluid communication device. For example, the connection sub2050and the mandrel holders2030comprise portions of a flowline2080. The flowline2080is in selectable fluid communication with the formation via the fluid communication device.

The connection sub2050includes a valve2070to control flow of formation fluid between the flowline2080and an exit port2071. As shown, the exit port2071fluidly communicates with the wellbore in which the sampling tool is disposed. However the exit port2071may fluidly communicate with the passage2090. The valve2070may be passive, such as provided with a check valve, a relief valve, or may be actively (electrically or hydraulically) driven.

The valve2070of the connection sub2050may permit sampling operation sometimes referred to as low shock sampling. During a low shock sampling operation, fluid is pumped from formations penetrated by the wellbore in which the sampling tool is positioned, and conveyed through the flowline2080. An isolation valve2074is closed, and the pumped fluid escapes the flowline2080at the exit port2071. When a fluid sample is to be captured, one of the sample valves2078associated with one on the sample bottles2060is opened. Once the sample bottle2060is full, the pumped fluid may still escape the flowline2080at the exit port2071. The one of the sample valves2078is closed to capture a fluid sample in the one sample bottle2060.

FIGS. 21 and 22are schematic views of portions of example sampling tools according to one or more aspects of the present disclosure. Similar toFIG. 2, the sampling tools comprise one or more fluid communication devices (e.g., probes) to extend from the sampling tools and to establish fluid communication with a subterranean formation penetrated by a wellbore in which any of the sampling tools are positioned.

The sampling tools comprise collars2110or2210having a passage, respectively2190or2290, to conduct drilling mud, as illustrated by the arrows. Mandrel holders2130and2230are positionable within the collar2110and2210, respectively. The mandrel holders2130and2230are to receive at least one sample bottle, such as sample bottle2160or2260. It is noted that the mandrel holders2130and2230may include more than one sample bottle, and that the mandrel holders2130and2230may includes sample bottles of different types.

As shown, the mandrel holders2130and2230have upper and lower connecting ends. Each of the upper and lower connecting ends is to be releasably coupled to a connection sub. For example, the upper connecting end of the mandrel holder2130is to be coupled to the connection sub2150. The lower connecting end of the mandrel holder2130is to be coupled to the connection sub2140. Similarly, the upper connecting end of the mandrel holder2230is to be coupled to the connection sub2220, and the lower connecting end of the mandrel holder2230is to be coupled to the connection sub2221. The assembly of mandrel holders and connection subs inFIGS. 21 and 22may permit incorporation of a variable number of sample bottles to a downhole sampling tool to be included in a drill string.

For example, a particular housing2120and collar2110having an appropriate length to incorporate the number of sample bottles may be selected. As shown inFIG. 21, the mandrel holders2130, including the samples bottles2160, may be stacked in the selected housing2120, interleaved between connection subs2140and2150. Upon coupling between the mandrel holders2130, the connection subs2140and the connection subs2150, fluid and/or electrical communication are established between the mandrel holders2130, the connection subs2140and the connection subs2150. Additional termination subs may be coupled to the stack. For example, the termination subs may include portions of connectors such as described in U.S. Pat. No. 7,367,394, loading devices to secure the plurality of connection subs and mandrel holders, among other components. The selected housing2120is then inserted into the selected collar2110. The housing and collar assembly is then coupled to the drill string.

In another example, the connection sub2220is to couple with an upper end2212of the collar2210. The connection sub2221is to couple with a lower end2214of the collar2210. For example, the connection subs2220and2221may comprise a male threaded connector to engage a corresponding female threaded connector on the collar2210. Thus, pairs of mandrel holders and collars, such as the mandrel holder2230and the collar2210, may be interconnected between connection subs, such as the connections subs2220and2221. After connection, the passage2290extends through the connection subs2220and2221, thereby permitting the conduction of drilling mud across the sampling tool. Also, fluid and/or electrical communication are established between the mandrel holders2230and the connection subs2220and2221. As shown inFIG. 22, additional collar and mandrel holder pairs may be interleaved between connection subs, thereby extending the number of sample bottles incorporated into the assembly.

Once incorporated, the sample bottles2160and2260may be in selectable fluid communication with the formation via the fluid communication device provided with the sampling tool. For example, a flowline2180fluidly coupled to the fluid communication device runs through connection subs2140and2150as well as through the mandrel holders2130. The samples bottles2160are selectively fluidly coupled to the flowline2180. Similarly, a flowline2280fluidly coupled to the fluid communication device runs through the connection subs2220and2221as well as through the mandrel holder2230. The sample bottle2260is selectively fluidly coupled to the flowline2280.

The connection subs2140,2150,2220and2221comprise a valve block comprising at least one valve. As shown, valves2170,2270and2271are to control flow between the sampling tool and at least one of the wellbore and the passage to conduct drilling mud. The connection subs2140comprise the valves2170fluidly coupled between the passage2190and the flowline2180via ports2172and apertures in the housing2120. The connection subs2220and2221include the valves2270and2271fluidly coupled between the flowline2280and ports2272and2273, respectively. The valves may be passive, such as check valves2170, or actively driven, such as the valves2270and2271. While some valves are shown as part of a connection sub, such valves may alternatively be provided in a mandrel holder. For example, isolation valve2276, and check valves2278and2279may alternatively be positioned in a valve block (not shown) of the mandrel holder2230.

Those skilled in the art and given the benefit of the present disclosure will appreciate that the valves2170and2270permit a low shock sampling operation. However, the sampling apparatus of the present disclosure, such as the sampling tool inFIG. 22, permit other types of sampling operations, for example reverse low shock sampling operations.

FIG. 23is a schematic view of an example mandrel holder according to one or more aspects of the present disclosure. The mandrel holder is positionable within a collar (not shown) of a downhole sampling tool.FIG. 23Ais a sectional view of the mandrel holder shown inFIG. 23.

The mandrel holder comprises a first connecting end2318and a second connecting end2328. Each of the connecting ends2318and2328is to couple to a connection sub, for example one or more of the connection subs described or contemplated by the present disclosure. For example, after coupling, a flowline2355of the mandrel holder is in selectable fluid communication with the formation via a fluid communication device of the downhole sampling tool. A flowline2350of the mandrel holder is in selectable fluid communication with an exit port of the sampling tool, for example a port fluidly coupled to at least one of a wellbore in which the sampling tool is positioned and a passage of the sampling tool to conduct drilling mud. In addition, the mandrel holder may comprise at least one of a hydraulic line2370or an electrical line2371. During coupling, fluid and/or electrical communication may be established between the hydraulic line2370and a pressure source (not shown) of the downhole sampling tool and between the electrical wire2371and an electrical power source (not shown) of the downhole sampling tool. Thus, hydraulic and/or electric power may be supplied to the mandrel holder, for example to actuate active valves provided therewith.

The mandrel holder is to receive at least one sample bottle2330. The sample bottle2330includes a sliding piston2332defining a variable volume chamber2331. The variable volume chamber2331is to receive and retain samples of formation fluid. The sample chamber2331includes an agitator2334. For example, the agitator1334may include magnetic material and may be actuated with a magnet positioned outside of the chamber2331.

The mandrel holder comprises an axial loading device2310that may be coupled to a connection sub (not shown) at the connecting end2318. For example, the axial loading device2310may be used to implement portion2240shown inFIG. 22. The axial loading device2310comprises a cap2312. The cap2312is to compress a spring stack2316between a loading block2314and a thrust ring2318upon insertion, for example threading, into a housing2340of the mandrel holder. The housing2340may be a pressure tied housing. The axial loading device2310contributes to securing the sample bottle2330in the mandrel holder. The thrust ring2318assists in decoupling the rotation of the cap2312from the sample bottle2330.

As shown, the mandrel holder may receive a plurality of sample bottles. The mandrel holder may comprise a first manifold2336fluidly coupled to the sample bottle and a second manifold2320to provide selectable fluid communication between each one of the plurality of sample bottles and the flowline2355. For example, each sample bottle2330be may coupled to a corresponding valve2322disposed in the second manifold2320. The second manifold2320may be coupled to a connection sub (not shown) at the connecting end2328. For example, the second manifold2320may be used to implement portion2250inFIG. 22.

The sample bottle2330is removable from the mandrel holder. For example, the cap2312may be decoupled, for example unthreaded, from the housing2340, releasing the manifold2336. The sample bottle2330may then be removed from within the housing2340. The sample bottle2330is provided with a self-closing valve2337. Thus, a fluid sample in the sample bottle2330may be positively sealed upon detaching or removing the sample bottle2330from the manifold2320.

The second manifold2320includes a sample port2326closed by a plug2327. When open, the sample port2326may be used to drain the sample bottle2330or to make measurements on the fluid located between the sample chamber2331and valve2322. Fluid communication between the sample port2326and the sample chamber2331is further controlled by a manual valve2325located in a cavity2324. Access to both the plug2327and the manual valve2325may be provided through the collar of the downhole sampling tool.

FIGS. 24A and 24Bare schematic views of a portion of an example sampling tool according to one or more aspects of the present disclosure. The downhole sampling tool comprises a collar2410. The collar2410comprising a passage2490to conduct drilling mud.

The downhole sampling tool comprises a mandrel holder. The mandrel holder comprises a frame2430. The frame2430is to support multiple sample bottles2436A,2436B and/or2436C. The frame2430is also to allow passage of fluid extracted from the formation, for example via a flowline2455, and/or fluid expelled from one of the sample bottles2436A,2436B and/or2436C via a flowline2450. The frame2430may further be used to pass hydraulic flowline(s)2470and power, signal, and communication wire(s)2471.

In operation, the frame2430is flooded with drilling mud conducted in the passage2490. Thus, the number of required pressure bearing barriers is reduced. Also, the space available for disposing the sample bottles2436A,2436B and/or2436C in the collar2410is increased. Further, an outer surface of the frame2430comprises a scalloped cutout to allow high flow of the drilling mud through the downhole sampling tool.

FIGS. 25 and 26are schematic views of portions of example sampling tools according to one or more aspects of the present disclosure. The downhole sampling tools comprise collars2510and2610. The collars2510and2610may comprise a passage (not shown) to conduct drilling mud. The downhole sampling tools also comprise mandrel holders and/or sample bottles2530and2630.

The mandrel holders and/or sample bottles2530and2630comprise flowlines2550and2650, respectively. For example, the flowlines2550and2650may be fluidly couple to a container or chamber in which a sample of formation fluid is retained. The mandrel holders and/or sample bottles2530and2630comprise flowlines2551and2651, respectively. Manual valves2525and2625are fluidly coupled between the flowlines2550and2650, and the flowlines2551and2651, respectively. The mandrel holders and/or sample bottles2530and2630also comprise plugs2527and2627. For example, the plugs2527and2627cover ports of the flowlines2551and2651, respectively.

The sampling tools provide access to the manual valves2525and2625through the collars2510and2610via access ports2524and2624, respectively. For example, each access port2524or2624comprises an aperture extending into a cavity, wherein the cavity registers with the corresponding manual valve2525or2625. The access so provided may allow, for example, a human operator to positively seal fluid samples retained inside the containers or chambers of the downhole sampling tools as soon as the sampling tools are retrieved to the Earth's surface. Then, the mandrel holders and/or the sample bottles2530and2630may safely be removed from the sampling tool.

The sampling tools also provide access to the manual plugs2527and2627through the collars2510and2610via access ports2526and2626, respectively. For example, each access port2526or2626comprises an aperture extending into a cavity, wherein the cavity registers with the corresponding plug2527or2627. The access so provided may allow, for example, a human operator to transfer fluid samples retained inside the containers or chambers of the downhole sampling tools to another portable container.

As shown inFIG. 26, the access ports2624and2626may be covered with respective removable plugs2652and2654.

FIGS. 27, 27A and 27Bare schematic views of a portion of an example sample bottle according to one or more aspects of the present disclosure. The sample bottle2710comprises an elongated container2712to receive a fluid sample. The sample bottle2710also comprises a valve2700to control flow of the fluid sample in/out of the elongated container2712. The valve2700may automatically open when the sample bottle2710is introduced into a downhole sampling tool. The valve2700may also automatically close when the sample bottle2710is removed from the sampling tool. Therefore, the valve2700may alleviate having to manually access the sample bottle2710before removing the sample bottle2710from the downhole sampling tool, for example.

The downhole sampling tool may comprise a collar having a passage to conduct drilling mud, and the sample bottle2710may be positioned at least partially within the passage, such as shown inFIGS. 22 and 23. The downhole sampling tool includes a body2730(e.g., a collar, a mandrel holder, a housing). A cavity2734extends into the body2730. The cavity2734is to receive at least partially the sample bottle2710. For example, the cavity2734may include a blind cylindrical recess, and the sample bottle2710may include a cylindrical end sized to fit in the cavity2734. A key2720may be provided to insure proper alignment between the sample bottle2710and the cavity2734.

A flowline having portions2750A, and2750C is fluidly coupled to a fluid communication device (e.g., a probe). The fluid communication device is to extend from the downhole sampling tool and establish fluid communication with a subterranean formation penetrated by a wellbore in which the downhole sampling tool is positioned. A valve2754is to control flow of fluid between the flowline portion2750A and the elongated container2712is initially closed. A valve2784to control flow of fluid through the flowline portion2750C is initially open. Thus, formation fluid may flow through the flowline portions2750A and2750C in a direction indicated by the arrow inFIG. 27A. To capture a sample of formation fluid in the elongated container2712, the valve2754may be opened and the valve2784may be closed. Thus, formation fluid may flow through a flowline portion2750B and into the elongated container2712in a direction indicated by the arrow inFIG. 27.

The sample bottle2710includes O-rings2752on two sides of an inlet of the flowline2750B. The O-rings2752are positioned on an outer surface of the sample bottle2710such that the O-rings2752provide a sealed fluid communication between the inlet of the flowline2750B and the flowline portion2750A after the sample bottle2710is inserted into the cavity2734, for example when it abuts a blind end of the cavity2734.

The end of the sample bottle2710includes a through hole2759. A rod2760is provided across the through hole and is to slide within the through hole2759. O-rings2716are provided between the rod2760and the sample bottle2710to seal the elongated container2712. The blind end of the cavity2734includes an actuator2732, such as a protuberance. The actuator2732is to actuate the rod2760of the sample bottle2710as the sample bottle2710is introduced into and/or removed from the cavity2734. For example, the rod2760is to engage the actuator2732when the bottle2710is inserted into the cavity2734, and to actuate (to open) the valve2700.

The actuator2732, the rod2760, the cavity2734and the sample bottle2710are sized such that the actuator2732engages the rod2760after the O-rings2752provide a sealed communication between the flowline portion2750A and the inlet of the flowline2750B. The actuator2732, the rod2760, the cavity2734and the sample bottle2710are sized such that the actuator2732disengages the rod2760before the sealed communication between the flowline portion2750A and the inlet of the flowline2750B provided by the O-rings2752is broken. Thus, the sealed communication between the flowline portion2750A and the inlet of the flowline2750B is maintained while the valve2700is opening or closing.

The valve2700comprises an enlarged end portion of the rod2760. The enlarged end portion comprises O-rings2762. The enlarged portion of the rod2760includes a cylindrical surface sized to fit into a profile2740shown enlarged inFIG. 27B. For example, the profile2740may include a first tapered portion against which the enlarged end portion of the rod2760may abut when the valve2700is closed. The profile2740may include a cylindrical portion against which the O-rings2762may seal. The profile2740may include another slightly tapered portion to progressively compress the O-rings2762as the valve2700closes. The valve2700is normally closed or self-sealing. For example, the valve2700may comprise a spring2765that biases the rod2760against the flowline2750B.

In use, the sample bottle2710is inserted into the cavity2734of the downhole sampling tool when the downhole sampling tool is at the Earth's surface. As apparent from the foregoing, a sealed fluid communication between the flowline portion2750A and the inlet of flowline portion2750B is established with the O-rings2752. The rod2760engages the actuator2732and slides with respect to the sample bottle2710, thereby opening the valve2700. The downhole sampling tool may be lowered into a wellbore. A sample of formation fluid may be received into the sample bottle2710. The downhole sampling tool may be retrieved to the Earth's surface. As the sample bottle2710is removed from the downhole sampling tool, first the rod2760slides with respect to the sample bottle2710, thus closing the valve2700as the O-rings2762engage the profile2740. Then, the rod2760disengages the actuator2732. Finally, the sealed fluid communication between the flowline portion2750A and the inlet of flowline portion2750B is broken. The valve2700thus seals a formation fluid sample in the sample bottle2710. A transport cap (not shown) may then be screwed on top of the sample bottle2710and may be sized to cover the O-rings2752. The sample may be accessed via a drain port2780.

In view of the above andFIGS. 1 to 27, it should be readily apparent to those skilled in the art that the present disclosure provides an apparatus comprising a fluid communication device to extend from a sampling tool and establish fluid communication with a subterranean formation penetrated by a wellbore in which the sampling tool is positioned, wherein the sampling tool comprises an opening extending into a cavity, a sample bottle coupled within the cavity and in selectable fluid communication with the formation via the fluid communication device, and a member to secure the sample bottle within the cavity. The member may comprise a protuberance extending from the outer surface of the sampling tool and to engage the sample bottle. The member may comprise a brace removably coupled to the outer surface of the sampling tool at opposing sides of the cavity. The member may comprise a ring to engage a perimeter of the sampling tool and an outer surface of the sample bottle.

The present disclosure also provides an apparatus comprising, a fluid communication device to extend from a sampling tool and establish fluid communication with a subterranean formation penetrated by a wellbore in which the sampling tool is positioned, wherein the sampling tool comprises an opening extending into a cavity, a sample bottle coupled within the cavity and in selectable fluid communication with the formation via the fluid communication device, and a protuberance extending from the outer surface of the sampling tool and to engage the sample bottle, whereby the sample bottle is secured within the cavity. The protuberance may comprise a web spanning over the opening. The protuberance may comprise a boss extending partially over the opening. The opening into the cavity and the protuberance may be to provide access to a portion of the sample bottle. The protuberance may be an integral part of a sampling tool housing. The sample bottle may comprise an inner metallic container and an outer polymeric sheath. The sampling tool may comprise a first body having a first portion of the cavity extending therein, and a second body having a second portion of the cavity extending therein, and the first and second bodies may be releasably coupled.

The present disclosure also provides an apparatus comprising, a fluid communication device to extend from a sampling tool and establish fluid communication with a subterranean formation penetrated by a wellbore in which the sampling tool is positioned, wherein the sampling tool comprises an opening extending into a cavity, a sample bottle coupled within the cavity and in selectable fluid communication with the formation via the fluid communication device, and a brace removably coupled to the outer surface of the sampling tool at opposing sides of the cavity, whereby the sample bottle is secured within the cavity. The brace may comprise a clamp. The clamp may be a saddle clamp. Alternatively or additionally, the brace may comprise a roll pin or a mesh. The opening into the cavity and the brace may provide access to an outer surface of the sample bottle. The brace may engage an outer surface of the sample bottle. The sample bottle may comprise an inner metallic container and an outer polymeric sheath.

The present disclosure also provides an apparatus comprising, a fluid communication device to extend from a sampling tool and establish fluid communication with a subterranean formation penetrated by a wellbore in which the sampling tool is positioned, wherein the sampling tool comprises an opening extending a cavity, a sample bottle coupled within the cavity and in selectable fluid communication with the formation via the fluid communication device, and a ring to engage a perimeter of the sampling tool and an outer surface of the sample bottle, whereby the sample bottle is secured within the cavity. The ring may comprise a wear band positionable over at least a portion of the cavity. The ring may comprise a drill string stabilizer positionable over at least a portion of the cavity. The opening into the cavity and the ring may provide access to a component of the sample bottle. The sample bottle may comprise an inner metallic container and an outer polymeric sheath.

The present disclosure also provides an apparatus comprising, a fluid communication device to extend from a sampling tool and establish fluid communication with a subterranean formation penetrated by a wellbore in which the sampling tool is positioned, wherein the sampling tool comprises an opening extending into a cavity, and a sample bottle to be positioned into the cavity and in selectable fluid communication with the formation via the fluid communication device. The sample bottle comprises an elongated container to receive a fluid sample, and a sheath engaging an outer surface of the elongated container and to couple to the cavity, whereby the sample bottle is secured within the cavity. The sheath may comprise a cylindrical blind cap. The sheath may comprise a polymeric material. The polymeric material may comprise at least one of polyether ether-ketone, polyether ketone, fluorocarbon polymer, nitrile butadiene rubber, or epoxy resin portions. The sheath may comprise flanges to secure the sample bottle to the sampling tool. The apparatus may further comprise a cover to be positioned over at least a portion of the opening. The cover may be affixed to the sheath. The sheath may comprise a wedge-shaped cross section to slide into a dovetail section of the cavity. The apparatus may further comprise at least one of a roll pin and a screw to secure the sheath to the sampling tool. The sheath may be removably coupled to the container via a jam-nut. The sheath may comprise a boss to engage a recess of the cavity.

The present disclosure also provides an apparatus comprising, a fluid communication device to extend from a sampling tool and establish fluid communication with a subterranean formation penetrated by a wellbore in which the sampling tool is positioned, wherein the sampling tool comprises an opening extending into a cavity, and wherein the cavity comprises a first threaded surface; and a sample bottle to be positioned into the cavity and in selectable fluid communication with the formation via the fluid communication device. The sample bottle comprises an elongated container to receive a fluid sample, and a retainer coupled to the elongated container and having a second threaded surface to engage the first threaded surface whereby the sample bottle is secured within the cavity. The sample bottle may comprise an outer polymeric sheath coupled to an outer surface of the elongated container. An outer surface of the sheath may engage an inner surface of the cavity. The retainer may comprise a cylindrical nose coupled to an end of the elongated container. The nose may comprise a passageway for the fluid sample. The retainer may comprise a nut coupled to an end of the sample bottle. The retainer may comprise a tongue coupled to the nut and to engage a groove located on an outer surface of the sample bottle. The retainer may comprise a screw. The screw may have an outer diameter larger than an outer diameter of the sample bottle.

The present disclosure also provides an apparatus comprising, a fluid communication device to extend from a sampling tool and establish fluid communication with a subterranean formation penetrated by a wellbore in which the sampling tool is positioned, wherein the sampling tool comprises an opening extending into a cavity, and a sample bottle to be positioned into the cavity and in selectable fluid communication with the formation via the fluid communication device. The sample bottle comprises an elongated container to receive a fluid sample, and a first magnet coupled to the elongated container. The apparatus further comprises a second magnet disposed proximate to the cavity and to attract the first magnet whereby the sample bottle is secured within the cavity. The first magnet may be positioned at an end of the elongated container. The second magnet may comprise a plurality of electro-magnets. The plurality of electromagnets may sense a position of a sliding piston disposed within the elongated container.

The present disclosure also provides an apparatus comprising, a fluid communication device to extend from a sampling tool and establish fluid communication with a subterranean formation penetrated by a wellbore in which the sampling tool is positioned, wherein the sampling tool comprises an opening extending into a cavity, and a sample bottle to be positioned into the cavity and in selectable fluid communication with the formation via the fluid communication device. The sample bottle comprises an elongated container to receive a fluid sample, and a valve to control flow of the fluid sample out of the elongated container. The apparatus further comprises an actuator coupled to the sampling tool and to open the valve upon positioning of the sample bottle into the cavity. The apparatus may further comprise a collar having a passage to conduct drilling mud, and the sample bottle may be positioned at least partially within the passage. The valve may be a normally closed valve.

The present disclosure also provides an apparatus comprising, a fluid communication device to extend from a drill string and establish fluid communication with a subterranean formation penetrated by a wellbore in which the drill string is positioned, a collar comprising a passage to conduct drilling mud, a mandrel holder positionable within the collar and to receive at least one sample bottle, the mandrel holder having first and second connecting ends, and first and second connection subs, wherein the first connection sub is to couple to the first connecting end of the mandrel holder, and wherein the second connection sub is to couple to the second connecting end of the mandrel holder, whereby the at least one sample bottle is incorporated into the drill string and is in selectable fluid communication with the formation via the fluid communication device. The passage to conduct drilling mud may extend through each of the first and second connection subs. At least one of the first and second connection subs may comprise a flowline in selectable fluid communication with the formation via the fluid communication device. The at least one of the first and second connection subs may comprise a valve to control flow of formation fluid between the flowline and at least one of the wellbore and the passage. The mandrel holder may comprise a flowline in selectable fluid communication with the formation via the fluid communication device. The mandrel holder may comprise a pressure tied housing. The mandrel holder, the first and the second connection subs may be stacked along a housing. The mandrel holder may receive a plurality of sample bottles, and may comprise a manifold to provide fluid communication between each one of the plurality of sample bottles and the formation. The mandrel holder may comprise at least one of a hydraulic line fluidly coupled to a pressure source and an electrical line coupled to an electrical power source. The mandrel holder may comprise a loading device to the at least one sample bottle. The loading device may comprise a thrust ring and a plurality of springs to engage the at least one sample bottle. The at least one sample bottle may comprise a manual valve, the collar may comprise an aperture extending into a cavity, and the cavity may register with the manual valve. The apparatus may further comprise a plug to cover the aperture. The at least one sample bottle may comprise an elongated container to receive a fluid sample, and a normally closed valve to control flow of the fluid sample out of the elongated container. The mandrel holder may comprise an actuator to open the normally closed valve upon positioning of the at least one sample bottle into the mandrel holder. The at least one sample bottle may be removable from the mandrel holder. The first and second connection subs may couple with first and second ends of the collar, respectively. Each of the first and second connection subs may comprise a male threaded connector to engage a corresponding female threaded connector on the collar.

The present disclosure also provides an apparatus comprising, a fluid communication device to extend from a drill string and establish fluid communication with a subterranean formation penetrated by a wellbore in which the drill string is positioned, a collar comprising a passage to conduct drilling mud, a connection sub comprising a flowline in selectable fluid communication with the formation via the fluid communication device, the connecting sub having first and second connecting ends; and first and second mandrel holders positionable within the collar and each to receive at least one sample bottle, wherein the first mandrel holder is to couple to the first connecting end of the connecting sub, and wherein the second mandrel holder is to couple to the second connecting end of the connecting, whereby at least two sample bottles are incorporated into the drill string and are in selectable fluid communication with the formation via the fluid communication device. The passage to conduct drilling mud may extend through the connection sub. The connection sub may comprise a valve to control flow of formation fluid between the flowline and at least one of the wellbore and the passage. At least one of the first and second mandrel holders may comprise a flowline in selectable fluid communication with the formation via the fluid communication device. At least one of the first and second mandrel holders may comprise a pressure tied housing. At least one of the first and second mandrel holders may receive a plurality of sample bottles, and may comprise a manifold to provide fluid communication between each one of the plurality of sample bottles and the formation. Each of the at least two sample bottles may comprise a manual valve, the collar may comprise an aperture extending into a cavity, and the cavity may register with the manual valve. The apparatus may further comprise a plug to cover the aperture. Each of the at least two sample bottles may comprise an elongated container to receive a fluid sample, and a normally closed valve to control flow of the fluid sample out of the elongated container. The mandrel holder may comprise an actuator to open the normally closed valve upon positioning of the at least one sample bottle into the mandrel holder. Each of the at least two sample bottles may be removable from the first and second mandrel holders. The connection sub may couple with the collar. The connection sub may comprise a male threaded connector to engage a corresponding female threaded connector on the collar. At least one of the first and second mandrel holders may comprise a loading device. The loading device may comprise a thrust ring and a plurality of springs to engage the at least one sample bottle. At least one of the first and second mandrel holders may comprise at least one of a hydraulic line fluidly coupled to a pressure source and an electrical line coupled to an electrical power source.

Although only a few example embodiments have been described in detail above, those skilled in the art will readily appreciate that many modifications are possible in the example embodiments without materially departing from this disclosure. Accordingly, such modifications are intended to be included within the scope of this disclosure as defined in the following claims. In the claims, means-plus-function clauses are intended to cover the structures described herein as performing the recited function and not only as structural equivalents, but also equivalent structures. Thus, although a nail and a screw may be not structural equivalents in that a nail employs a cylindrical surface to secured wooden parts together, whereas a screw employs a helical surface, in the environment of fastening wooden parts, a nail and a screw may be equivalent structures. It is the express intent of the applicant not to invoke 35 U.S.C. §112, paragraph 6 for any limitations of any of the claims herein, except for those in which the claim expressly uses the words “means for” together with an associated function.