Source: http://www.google.com/patents/US7104344?dq=7,603,356
Timestamp: 2016-05-01 17:44:19
Document Index: 799596395

Matched Legal Cases: ['art.\n3', 'art.\n14', 'art 5', 'art 5', 'art 5', 'art 5', 'art 5', 'art 11', 'art 12', 'art 11', 'art 11', 'art 11']

Patent US7104344 - Percussion drilling head - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsDevice and method for drilling into geological formations. The device comprises: a rotatable body; drilling cutters arranged on an axial end surface of the rotatable body; a percussion part, which is parallel to the rotating axis reciprocatable arranged on said body; and percussion cutters arranged on...http://www.google.com/patents/US7104344?utm_source=gb-gplus-sharePatent US7104344 - Percussion drilling headAdvanced Patent SearchPublication numberUS7104344 B2Publication typeGrantApplication numberUS 10/490,173PCT numberPCT/EP2002/010530Publication dateSep 12, 2006Filing dateSep 19, 2002Priority dateSep 20, 2001Fee statusPaidAlso published asCA2460069A1, CA2460069C, CN1318723C, CN1556892A, US20040256155, WO2003025327A1Publication number10490173, 490173, PCT/2002/10530, PCT/EP/2/010530, PCT/EP/2/10530, PCT/EP/2002/010530, PCT/EP/2002/10530, PCT/EP2/010530, PCT/EP2/10530, PCT/EP2002/010530, PCT/EP2002/10530, PCT/EP2002010530, PCT/EP200210530, PCT/EP2010530, PCT/EP210530, US 7104344 B2, US 7104344B2, US-B2-7104344, US7104344 B2, US7104344B2InventorsPetrus Cornelis Kriesels, Djurre Hans ZijslingOriginal AssigneeShell Oil CompanyExport CitationBiBTeX, EndNote, RefManPatent Citations (30), Non-Patent Citations (6), Referenced by (19), Classifications (12), Legal Events (3) External Links: USPTO, USPTO Assignment, EspacenetPercussion drilling head
US 7104344 B2Abstract
Device and method for drilling into geological formations. The device comprises:
a rotatable body; drilling cutters arranged on an axial end surface of the rotatable body; a percussion part, which is parallel to the rotating axis reciprocatable arranged on said body; and percussion cutters arranged on an axial end surface of the percussion part. The method comprises the steps of:
bringing a percussion part with a percussive movement in contact with the formation in order to crack at least a part of the formation, and scraping the cracked parts of the formation with a drilling part. Images(5) Claims(18)
1. A device for drilling into a geological formation comprising:
a body rotatable about a rotating axis;
drilling cutters arranged on an axial end surface of the rotatable body;
a percussion part, which is parallel to the rotating axis reciprocatably arranged relative to said body for cracking a part of the geological formation to be drilled; and
percussion cutters arranged on an axial end surface of the percussion part;
wherein the drilling cutters are arranged for scraping the cracked part of the geological formation and the axial end surface of the percussion part and the axial end surface of the rotating body overlap each other in radial direction with respect to the rotating axis.
2. The device of claim 1, further comprising driving means for reciprocatably driving of the percussion part.
3. The device of claim 2, wherein the driving means are hydraulic driving means.
4. The device of claim 1, wherein the drilling cutters comprise polycrystalline diamond.
5. The device of claim 1, wherein the percussion cutters are at least partly sphere shaped.
6. The device of claim 1, wherein the percussion cutters comprise a sharp cuffing edge.
7. The device of claim 1, wherein nozzles are arranged into at least one of the group consisting of the axial end surface of the percussion part and the axial end surface of the body.
8. The device of claim 1, wherein an end part of the percussion part has a fan shaped cross-section and that an end part of the rotatable body has a complementary cross-section, such that the end part of the percussion part is axially guided by the end part of the rotatable body.
9. The device of claim 1, wherein a peripheral part of the percussion part has a helical path of movement.
10. A method for drilling into a geological formation, comprising:
percussion cutters arranged on an axial end surface of the percussion part, wherein the drilling cutters are arranged for scraping the cracked part of the geological formation and the axial end surface of the percussion part and the axial end surface of the rotating body overlap each other in radial direction with respect to the rotating axis;
bringing the percussion part of the device with a percussive movement in contact with the formation in order to crack at least a part of the geological formation; and
scraping the cracked parts of the geological formation with a separate drilling part comprising the drilling cutters.
11. A device for drilling into a geological formation comprising:
a percussion part, which is parallel to the rotating axis reciprocatably arranged relative to said body for cracking a part of the geological formation to be drilled, wherein an end part of the percussion part has a fan shaped cross-section and that an end part of the rotatable body has a complementary cross-section, such that the end part of the percussion part is axially guided by the end part of the rotatable body; and
wherein the drilling cutters are arranged for scraping the cracked part of the geological formation.
12. The device of claim 11, wherein a peripheral part of the percussion part has a helical path of movement.
13. The device of claim 11, further comprising driving means for reciprocatably driving of the percussion part.
14. The device of claim 13, wherein the driving means are hydraulic driving means.
15. The device of claim 11, wherein the drilling cutters comprise polycrystalline diamond.
16. The device of claim 11, wherein the percussion cutters are at least partly sphere shaped.
17. The device of claim 11, wherein the percussion cutters comprise a sharp cutting edge.
18. The device of claim 11, wherein nozzles are arranged into at least one of the group consisting of the axial end surface of the percussion part and the axial end surface of the body.
The present application claims priority on European Patent Application 01308019.7 filed on 20 Sep. 2001.
drilling cutters arranged on an axial end surface of the rotatable body.
Such devices are generally known. The drilling cutters form a rotating movement with which they scrape parts of the bottom of the hole to be formed. These cuttings are then removed by for example the drilling fluid.
To alleviate this disadvantage drilling devices are known which use the same principle as a hammer drill. In such a device a bit part is rotated and a hammer part is hammered against this bit part. The vibrations caused by the hammering of the hammer part cause cracks into the material in which the hole is drilled. The rotating bit then scrapes off the cracked parts of the material. A disadvantage of such a device is that the cutters have to endure high forces because of the hammering resulting in an excessive wear of the drill cutters. Another disadvantage is that part of the hammering energy is absorbed in the contact surface between drill bit and hammer part.
A further disadvantage is that when sharp cutters are used, which will penetrate the formation, the cutters will hinder rotation of the drilling device.
The invention provides a drilling device comprising:
a percussion part, which is parallel to the rotating axis reciprocatably arranged relative to said body;
percussion cutters arranged on an axial end surface of the percussion part.
Because the rotational drilling action is separated from the percussion action, both the drilling cutters and the percussion cutters can be optimized for their specific task. The percussion part, which is reciprocatably arranged relative to the rotatable body comes in direct contact with the material to be drilled, such that the full energy of the stroke of the percussion part is absorbed by the material to be drilled. The drilling cutters only perform a rotating movement, such that they scrape off the material, which has been cracked by the percussion part.
The separation of the percussion action and the drilling action ensures also that the drilling part is in constant contact with the bottom of the hole and that the percussion part will make full strokes. The percussion part could be reciprocatably driven by driving means. These driving means could be electric or hydraulic. An advantage of hydraulic driving means is that the drilling fluids could be used to drive the percussion part. Furthermore, since the allowable stroke of the percussion part is significantly larger than for conventional percussion drilling devices, it is particularly attractive to apply hydraulic driving means.
In a preferred embodiment the drilling cutters comprise PDC. (polycrystalline diamond compact).
It is also possible that the drilling cutters are provided at at least one roller cone. Correspondingly, the percussion cutters could also be provided at at least one roller cone.
In another preferred embodiment the percussion cutters have a sharp edge to penetrate the formation. Sharp cutters are more effective in penetrating and cracking the formation than sphere shaped cutters. As these percussion cutters reciprocate relative to the drilling cutters, which are in constant contact with the bottom of the hole, the percussion cutters will be in contact with the bottom for a short time and will therefore hinder minimally the rotation of the drilling device.
In another embodiment of the device according to the invention nozzles are arranged into the axial end surface of the percussion part and/or the axial end surface of the body. These nozzles provide jets of drilling fluid. These jets are used for cooling, lubrication and for discharging the scrapings.
In an other preferred embodiment of the device according to the invention an end part of the percussion part has a fan-shaped cross section and an end part of the rotatable body has a complementary cross section, such that the end part of the percussion part is axially guided by the end part of the rotatable body. Seen in rotation direction, the drilling cutters are preceded by a percussion part. These percussion parts crack the material to be drilled and subsequently the drilling cutters scrape of the cracked cutters.
bringing a percussion part with a percussive movement in contact with the formation in order to crack at least a part of the formation, and
scraping the cracked parts of the formation with a drilling part.
FIG. 1 shows a cross sectional view of a device according to the invention.
FIG. 2 shows a bottom view of the device according to FIG. 1.
FIG. 3 shows a schematical side view of a device according to FIG. 1.
FIG. 4 shows a bottom view of a second embodiment of the device according to the invention.
FIG. 1 shows a schematical cross sectional view of a drilling device 1 according to the invention. This drilling device 1 comprises a rotational body 2. On the axial end surface 3 of the rotational body 2, drilling cutters 4 are arranged.
In FIG. 2 a bottom view is shown. In this figure the section line I—I of FIG. 1 is shown. The percussion part 5 has a fan-shaped cross section in which nozzles 8 are arranged. The rotational body 2 has a shape, which is complementary to the fan-shape of the percussion part. The rotational body 2 and the percussion part 5 constitute together a circular cross section.
FIG. 3 shows schematically the operation of a drilling device 1 according to the invention. The rotational body 2 makes a rotational movement R. The drilling cutters 4 stay in constant contact with the bottom 9 of the hole to be drilled. The percussion part 5 moves up and down according to the movement P. Because the percussion part 5 is separated from the rotational body 2, the stroke of the reciprocating movement can be large, such that the percussion cutters hit the bottom 9 of the hole with a considerable speed and thus energy as a result of which the material of the bottom 9 cracks more easily and can consequently easier be scraped of by the drilling cutters 4.
An advantage of a device according to the invention is that stick-slip is diminished or even eliminated as a result of the percussion movement of the percussion part. Also because of the short contact time of the percussion part 5, this stick-slip is avoided.
The vibrations caused by the percussion part could be used as an acoustic source for seismic measurements. These seismic measurements are used to determine what kind of formation is present under the bottom of the hole.
In FIG. 4 a second embodiment of a device according to the invention is shown. This device 10 has again a percussion part 11 and a drilling part 12. The percussion part 11 is provided with a number of percussion cutters 13, which are pyramid shaped. This pyramid shape provides a good cracking action for cracking the formation at the bottom of the hole.
The percussion part 11 performs a reciprocatable movement in order to hammer onto the formation. This reciprocatable movement could be combined with a rotational movement, such that the peripheral part of the percussion part 11 has a helical path of movement. Preferably, this rotation has the same direction as the drilling rotation.
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Sneddon, et al., Society of Petroleum Engineers SPE 17007, 1987.Referenced byCiting PatentFiling datePublication dateApplicantTitleUS7546888 *Jun 11, 2004Jun 16, 2009Shell Oil CompanyPercussive drill bitUS7886851Feb 15, 2011Schlumberger Technology CorporationDrill bit nozzleUS8020471Feb 27, 2009Sep 20, 2011Schlumberger Technology CorporationMethod for manufacturing a drill bitUS8225883Jul 24, 2012Schlumberger Technology CorporationDownhole percussive tool with alternating pressure differentialsUS8281882May 29, 2009Oct 9, 2012Schlumberger Technology CorporationJack element for a drill bitUS8297378Oct 30, 2012Schlumberger Technology CorporationTurbine driven hammer that oscillates at a constant frequencyUS8360174Jan 29, 2013Schlumberger Technology CorporationLead the bit rotary steerable toolUS8499857Nov 23, 2009Aug 6, 2013Schlumberger Technology CorporationDownhole jack assembly sensorUS8522897Sep 11, 2009Sep 3, 2013Schlumberger Technology CorporationLead the bit rotary steerable toolUS8528664Jun 28, 2011Sep 10, 2013Schlumberger Technology CorporationDownhole mechanismUS8567532Nov 16, 2009Oct 29, 2013Schlumberger Technology CorporationCutting element attached to downhole fixed bladed bit at a positive rake angleUS8590644Sep 26, 2007Nov 26, 2013Schlumberger Technology CorporationDownhole drill bitUS8622155Jul 27, 2007Jan 7, 2014Schlumberger Technology CorporationPointed diamond working ends on a shear bitUS8701799Apr 29, 2009Apr 22, 2014Schlumberger Technology CorporationDrill bit cutter pocket restitutionUS8714285Nov 16, 2009May 6, 2014Schlumberger Technology CorporationMethod for drilling with a fixed bladed bitUS8950517Jun 27, 2010Feb 10, 2015Schlumberger Technology CorporationDrill bit with a retained jack elementUS9051795Nov 25, 2013Jun 9, 2015Schlumberger Technology CorporationDownhole drill bitUS20060131075 *Jun 11, 2004Jun 22, 2006Cruz Antonio Maria Guimaraes LPercussive drill bitUS20080035388 *Oct 12, 2007Feb 14, 2008Hall David RDrill Bit Nozzle* Cited by examinerClassifications U.S. Classification175/57, 175/420.2, 175/296, 175/415International ClassificationE21B10/36, E21B10/42, E21B10/40, E21B7/00Cooperative ClassificationE21B7/002, E21B10/40European ClassificationE21B7/00G, E21B10/40Legal EventsDateCodeEventDescriptionAug 2, 2004ASAssignmentOwner name: SHELL OIL COMPANY, TEXASFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KRIESELS, PETRUS CORNELIS;ZIJSLING, DJURRE HANS;REEL/FRAME:015714/0850;SIGNING DATES FROM 20040311 TO 20040316Dec 16, 2009FPAYFee paymentYear of fee payment: 4Feb 12, 2014FPAYFee paymentYear of fee payment: 8RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services