Source: http://www.google.com/patents/US20080210441?dq=6,621,746
Timestamp: 2015-04-26 18:22:50
Document Index: 692977894

Matched Legal Cases: ['art 16', 'art 18', 'art 16', 'art 18', 'art 18', 'art 16', 'art 16', 'art 18', 'art 18', 'art 16', 'art 16', 'art 16', 'art 18', 'art 18', 'art 18', 'art 14', 'art 18', 'art 18', 'art 16', 'art 18', 'art 16', 'art 18', 'art 16']

Patent US20080210441 - Method and Apparatus for Connecting, Installing, and Retrieving a Coiled ... - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsA wellhead system has a wellhead of a subterranean hydrocarbon well, a coiled tubing hanger in the wellhead, a coiled tubing hanger extension connected to a top portion of the coiled tubing hanger, a first seal inside the coiled tubing hanger extension, the first seal and the coiled tubing hanger extension...http://www.google.com/patents/US20080210441?utm_source=gb-gplus-sharePatent US20080210441 - Method and Apparatus for Connecting, Installing, and Retrieving a Coiled Tubing-Conveyed Electrical Submersible PumpAdvanced Patent SearchPublication numberUS20080210441 A1Publication typeApplicationApplication numberUS 11/768,088Publication dateSep 4, 2008Filing dateJun 25, 2007Priority dateMar 2, 2007Also published asUS7748444Publication number11768088, 768088, US 2008/0210441 A1, US 2008/210441 A1, US 20080210441 A1, US 20080210441A1, US 2008210441 A1, US 2008210441A1, US-A1-20080210441, US-A1-2008210441, US2008/0210441A1, US2008/210441A1, US20080210441 A1, US20080210441A1, US2008210441 A1, US2008210441A1InventorsBrian Scott, David B. Pye, Joseph A. NicholsonOriginal AssigneeSchlumberger Technology CorporationExport CitationBiBTeX, EndNote, RefManReferenced by (1), Classifications (8), Legal Events (2) External Links: USPTO, USPTO Assignment, EspacenetMethod and Apparatus for Connecting, Installing, and Retrieving a Coiled Tubing-Conveyed Electrical Submersible Pump
US 20080210441 A1Abstract
a wellhead of a subterranean hydrocarbon well; a coiled tubing hanger in the wellhead; a coiled tubing hanger extension connected to a top portion of the coiled tubing hanger; a first seal inside the coiled tubing hanger extension, the first seal and the coiled tubing hanger extension defining a sealed space in the coiled tubing hanger extension; coiled tubing extending into the sealed space in the coiled tubing hanger extension and being suspended by the coiled tubing hanger and the coiled tubing hanger extension, the coiled tubing extending into the wellhead; a downhole electrical cable extending through the coiled tubing and into the sealed space in the coiled tubing hanger extension; an electrical connector extending through the seal and being connected electrically to the cable, the electrical connector having an electrical circuit having an electrically open and an electrically closed position, one side of the electrical circuit being electrically connected to an uphole electrical cable and another side of the electrical circuit being electrically connected to the downhole electrical cable. 2. The wellhead system of claim 1, comprising a second seal that seals the top of the coiled tubing hanger extension, thereby forming an open area between the first seal and the second seal, the open area being within the coiled tubing hanger extension.
5. The wellhead system of claim 1, wherein a top end of the coiled tubing has an opening and the opening is inside the sealed space within the coiled tubing hanger extension.
6. The wellhead system of claim 1, wherein a second seal is fastened to the top of the wellhead thereby covering and sealing the wellhead.
7. The wellhead system of claim 1, wherein an electrical submersible pump is connected to a downhole end of the coiled tubing and is electrically connected to the downhole electrical cable.
8. A coiled tubing hanger device for connecting to coiled tubing, the coiled tubing extending through the coiled tubing hanger device, comprising;
a first seal inside the coiled tubing hanger device, the first seal sealing an end of the coiled tubing hanger device thereby preventing passage of fluid into and out of the coiled tubing hanger device by the first seal; an electrical connector extending through the first seal, the downhole connector comprising an electrical circuit having an electrically open position and an electrically closed position. 9. The coiled tubing hanger device of claim 8, comprising a coiled tubing hanger and a coiled tubing hanger extension, the coiled tubing hanger extension being connected to the coiled tubing hanger.
10. The coiled tubing hanger device of claim 8, comprising a second seal sealing the top of the coiled tubing hanger device, thereby forming an open area between the second seal and the first seal, the open area being within the coiled tubing hanger device.
11. The wellhead system of claim 1, wherein the electrical circuit is manually opened and manually closed.
12. The coiled tubing hanger device of claim 11, wherein the electrical circuit is manually opened and manually closed by rotating a part of the electrical connector.
13. A wellhead assembly, comprising:
a wellhead; a coiled tubing hanger device; and a seal; wherein the seal is connected inside the coiled tubing hanger device so as to seal an end of the coiled tubing hanger device thereby preventing passage of fluid into or out of the coiled tubing hanger device past the seal. 14. The wellhead assembly of claim 13, comprising coiled tubing extending through an opening in the hanger device and into a space inside the hanger device.
15. The wellhead assembly of claim 13, comprising an electrical power cable extending inside the coiled tubing and into the opening inside the hanger device.
15. The wellhead assembly of claim 14, comprising an electrical connector extending through the seal.
16. The wellhead assembly of claim 15, wherein the electrical cable is connected to the electrical connector.
17. The wellhead assembly of claim 15, wherein the electrical connector comprises a circuit having an electrically open position and an electrically closed position.
18. The wellhead assembly of claim 16, wherein the electrical connector is connected to an external power source.
19. The wellhead assembly of claim 17, wherein the electrical circuit is alternately opened and closed by operation of a part of the electrical connector that is external to the space inside the coiled tubing hanger device.
20. The wellhead assembly of claim 17, wherein the electrical connector is connected through the seal in a fluid tight connection, and the electrical connector can be alternately operated to open and close the electrical circuit by operating the connector at a location outside of the coiled tubing hanger device.
21. The wellhead assembly of claim 17, wherein the circuit is opened and closed by rotating a part of the connector.
The present application is based on and claims the benefit of priority under 35 U.S.C. � 119 to U.S. Provisional Patent Application Ser. No. 60/892,737, entitled, �Method and Apparatus for a Connecting, Installing, and Retrieving a Coiled Tubing-Conveyed Electrical Submersible Pump,� filed on Mar. 2, 2007.
In the specification and appended claims: the terms �connect�, �connection�, �connected�, �in connection with�, and �connecting� are used to mean �in direct connection with� or �in connection with via another element� and the term �set� is used to mean �one element� or �more than one element�. As used herein, the terms �up� and �down�, �upper� and �lower�, �upwardly� and downwardly�, �upstream� and �downstream�; �above� and �below�; and other like terms indicating relative positions above or below a given point or element are used in this description to more clearly described some embodiments of the invention. However, when applied to equipment and methods for use in wells that are deviated or horizontal, such terms may refer to a left to right, right to left, or other relationship as appropriate.
In the written description and appended claims, the term �coiled tubing� may be interpreted to mean any downhole tubing that is capable of serving as a conduit for downhole fluids from downhole to uphole and for conveying downhole tools, and/or has any other attributes that are known to be associated with coiled tubing.
With reference to FIG. 1, some embodiments of the present invention include a wellhead device. A wellhead 2 is a top portion of a casing string that extends into a subterranean hydrocarbon wellbore, thereby lining the wellbore. The wellhead 2 can extend out of the wellbore. Coiled tubing 8 is extended downhole inside the wellbore 2. A coiled tubing hanger 4 is provided to support the weight of the coiled tubing 8 when extending downhole. The hanger 4 can connect to the coiled tubing 8, and can in turn be secured to the wellhead 2 to support the weight of the coiled tubing 8. A hanger extension 6 can be connected to the uphole end of the hanger 4 and can include seals 32 to ensure a pressure tight connection for the purposes of downhole operation. A single hanger part can be used instead of hanger 4 and hanger extension 6. The hanger extension 6 can be connected to the inside of the wellbore 2. One way to connect the hanger extension 6 to the wellbore 2 is by way of ridges 42 on the inside of the wellbore 2. Additionally, seals 28 can be used to ensure a pressure tight seal for the purposes of downhole operation. That configuration supports the weight of the coiled tubing 8 by way of the hanger 4, the hanger extension 6, and the wellhead 2.
As noted earlier, one issue is the potential failure of the device resulting in downhole fluid being ejected from inside the coiled tubing into the space inside the hanger extension 6. Thus, a seal 21 is provided inside the hanger extension 6 that prevents pressurized fluids from traveling up through the coiled tubing 8, into the space inside the hanger extension 6, and into other areas that can prove dangerous for operators. Also, a seal 36 can be used to provide added security. The seal 36 can be fastened to the top of the wellhead 2, the top of the hanger extension 6, or a combination thereof. The seal 36 can be fastened by any suitable means, including welding, latching, clamping or bolting, to name but a few. FIG. 1 shows the use of bolts 26 connected through the seal 36 and into the wellhead 2.
The seal 21 is provided with an opening through which an electrical connector 14 is provided. The connector 14 comprises two parts, part 16 and part 18. The connector 14 is constructed so as to create an electrical circuit with an open position and a closed position. In the open position the part 16 is separated from the part 18 enough so that electric current will not flow from the part 18 to the part 16 sufficiently to drive a downhole tool. In the closed position the part 16 is close enough (preferably in physical contact) to the part 18 so that electricity will flow from the part 18 to the part 16 sufficiently to drive a downhole tool. The part 16 of the connector 14 is connected through the seal 21 in such a manner to maintain a pressure seal during well operations. The cable 20 is preferably electrically connected to the part 16 of the connector 14. Also, the part 18 of the connector 14 is preferably connected to an external electrical supply via a cable 40. The connector 14 is operated by rotating the part 18, which extends through a seal 36, so that the part 18 contacts part 14 so as to be electrically conductive. Tongue and groove screw elements can provide the action to the part 18 to raise and lower. It should be appreciated that there are many configurations of the connector 14 that are suitable. Some of those are of a switch variety, a circuit breaker variety, a push button variety, etc. Also, any manual or remotely operated opening/closing of the electrical connection is included as embodiments of the present invention. The embodiment shown in FIG. 1 is a Dry-Mate Connector and is available from Diamould Limited, which is a subsidiary of Schlumberger Technology Corporation. A detailed drawing of such a connector is shown in FIG. 2. There, the first part 18 comprises a plug 18 which is adjacent to the second part 16. The cable 40 connects to the first part 18 and the cable 20 connects to the second part 16. A dry-mate plug 46 is provided to aid in sealing the device.
It should be noted that it is not necessary to provide a seal 36, and that any structure that can adequately support the connector 14 can be used. Further, no structure is required, depending on the configuration of the connector 14, e.g., if the connector 14 is a single part, as long as the seal 21 is provided.
An open space between the seal 21 and the seal 36 is shown in FIG. 1 and, though not necessary, can be quite advantageous as far as assembly is concerned. For example, when the seal 36 is not in place, a tool can be used to connect inside the space thereby supporting the device by way of the hanger extension 6. The tool can be used to place the hanger device inside the wellhead 2, and conversely, to remove such from the wellhead 2.
The seal 21 can be manufactured from many different and equally suitable materials, e.g., metals and elastomer materials that are recognized in the art as being applicable in connection with oilfield device. Similarly, the seal 36 can be made and applied according to general knowledge in the art.
The device is capable of being assembled in many ways. Generally, the device is assembled by connecting a downhole device to an end of the coiled tubing 8. The downhole device and the coiled tubing are then fed into the wellbore. Once at a predetermined level downhole, the end of the coiled tubing is connected to a hanger 4, and perhaps a hanger extension 6. Alternately, a single hanger device can be used. The hanger is then connected within the wellhead 2 to support the weight of the coiled tubing 8 and associated downhole device. At some point the electrical cable 20 is connected to the connector 14 which extends through the seal 20 and the seal 21 is secured in place. According to FIG. 1 herein, the second part 18 of the connector 14 is appropriately positioned to function with the first part 16 of the connector 14, so as to provide electricity downhole.
Referenced byCiting PatentFiling datePublication dateApplicantTitleUS7770656 *Oct 3, 2008Aug 10, 2010Pine Tree Gas, LlcSystem and method for delivering a cable downhole in a well* Cited by examinerClassifications U.S. Classification166/385International ClassificationE21B23/10Cooperative ClassificationH01R13/523, E21B33/0385, E21B33/0407, H01R13/533European ClassificationE21B33/038B, E21B33/04ELegal EventsDateCodeEventDescriptionDec 11, 2013FPAYFee paymentYear of fee payment: 4Aug 10, 2007ASAssignmentOwner name: SCHLUMBERGER TECHNOLOGY CORPORATION, TEXASFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SCOTT, BRIAN;PYE, DAVID B.;NICHOLSON, JOSEPH A.;REEL/FRAME:019678/0390;SIGNING DATES FROM 20070725 TO 20070807Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SCOTT, BRIAN;PYE, DAVID B.;NICHOLSON, JOSEPH A.;SIGNED BETWEEN 20070725 AND 20070807;REEL/FRAME:19678/390Owner name: SCHLUMBERGER TECHNOLOGY CORPORATION,TEXASFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SCOTT, BRIAN;PYE, DAVID B.;NICHOLSON, JOSEPH A.;SIGNING DATES FROM 20070725 TO 20070807;REEL/FRAME:019678/0390RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services