EP1811125A1 - Borehole reamer - Google Patents
Borehole reamer Download PDFInfo
- Publication number
- EP1811125A1 EP1811125A1 EP06001056A EP06001056A EP1811125A1 EP 1811125 A1 EP1811125 A1 EP 1811125A1 EP 06001056 A EP06001056 A EP 06001056A EP 06001056 A EP06001056 A EP 06001056A EP 1811125 A1 EP1811125 A1 EP 1811125A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- reamer
- hole
- tool
- drill
- vibration damper
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000005553 drilling Methods 0.000 claims abstract description 22
- 238000013016 damping Methods 0.000 claims abstract description 16
- 239000003381 stabilizer Substances 0.000 claims abstract description 8
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 4
- 239000012530 fluid Substances 0.000 claims description 8
- 230000015572 biosynthetic process Effects 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 5
- 150000001247 metal acetylides Chemical class 0.000 claims 1
- 239000003129 oil well Substances 0.000 abstract 1
- 238000005755 formation reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
- E21B10/28—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with non-expansible roller cutters
- E21B10/30—Longitudinal axis roller reamers, e.g. reamer stabilisers
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
Definitions
- the present invention relates to a vibration damping reamer to be used in the stabilizing of a drilling tool during operation.
- the vibration damping reamer of the present invention is directed to an arrangement that will damp vibrations arising from use of the drill.
- the first function that is provided by a reamer is to cut formations to enlarge the bored hole to the desired size, which may be the original size of the bit in the case where the drill bit wears to be under-gauged.
- reamers are employed to cut formations because the bit does not always drill a true bore hole and because of slight lateral shifting which is inherent in the drilling operation, which shifting leaves ledges and other distortions.
- the second function of a reamer is to keep the drill stem in the centre of the hole, that is, the reamer acts as a stabilizer.
- Stabilizers are positioned above the drill bit to ensure that the drill bit and stabilizer assembly drill a straight hole of the desired diameter. Maintaining the drill stem centered has many beneficial effects, its primary one being minimizing unintentional hole-angle directional drilling.
- a stabilizer thereby extends the life of the drill bit by maintaining the diameter of the hole to the original specification.
- Vibrations induced in the assembly may be lateral vibrations, that is, the assembly moves from side to side during operation; vibrations may also be axial with movement occurring generally vertically, or within the hole. Additionally, torsional vibrations occur resulting from the rotation of the assembly within the hole. Vibrations. Such vibrations may cause damage to the drill assembly reducing the life thereof.
- the present invention provides the public with an alternative to existing reamers.
- a vibration damping reamer for use in association with a drill stem and a drill bit in drilling a hole in a rock formation, said vibration damping reamer having:-
- the reamer By arranging axially spaced reaming bands along the length of the cylindrical body, the reamer is thus is use, brought to bear against the drilled hole-wall at axially spaced positions. The surface of the reamer bears against the hole-wall thereby ensuring any vibrations induced in the tool are damped.
- the adoption of two or more bearing points, represented by the wear surfaces provides for stability in the position of the reamer and thereby the drill assembly.
- reaming bands axially spaced along the reamer part are separated a region of reduced diameter.
- said wear surfaces studded with a plurality of hardwearing studs, for example carbide surface studs.
- the vibration damping reamer of the present invention may be embodied as either a near bit vibration damping reamer in which the reamer part is adjacent the drill bit in use, or alternatively as a string reamer in which the reaming part is spaced along the drilling string from the drill bit.
- said spaced apart axially extending spiral flutes cut into said outer surface are cut at a high angle relative to thereby minimize the extent of helical movement in fluid moving in the flutes.
- the spaced apart axially extending spiral flutes cut into said outer surface are cut, and the distance between adjacent axially spaced wear surfaces are arranged such that, around the circumference of the reamer, a wear surface engages the surrounding hole wall at some point.
- vibration damping reamer 10 formed in accordance with the present invention.
- the reamer 10 is shown to advantage in perspective view in figure 1.
- the reamer 10 is used in association with a drill stem and a drill bit in drilling a hole in a rock formation. In the orientation shown a drill is located below the reamer 10.
- the geometry of the reamer 10 is such a drill bit would be located below the tool 10 with the top of the drill hole beyond the top of the page.
- the vibration damping reamer 10 includes a body 12 having a through going bore 14 for passage of drilling fluids there through.
- the bore 14 is of appropriate size to allow smooth passage of drilling fluids there through.
- the body is divided into a generally cylindrical upper part 16 adapted for connection to a drill string (not shown) and a generally cylindrical lowermost reamer part 18 of diameter wider than the upper part 16.
- the upper part 16 has a smooth surface whereas the lowermost reamer part 18 has a complex surfaced described in detail below.
- the lowermost reamer part 18 terminates in an inwardly tapered bottom section 20. The diameter of the bottom section 20 is adjusted so as to be consistent with the size of drill bit to which the reamer 10 is attached.
- the reamer part 18 includes an uppermost shoulder section 22 that allows the diameter of the tool as a whole to be increased from the narrower upper section 16 to the wider lower section 18.
- spiral flutes 28 are cut into the outer surface of the lower reamer part 16. As seen in the drawings the spiral flutes 28 are evenly spaced around the circumference of the tool 10. The spiral flutes 28 serve to collect drilling fluid and entrained rock material collected from a hole during a drilling operation and to deliver the material to the surface. It can also be observed from figure 5 that the spiral flutes 28 have a slightly squared off cross-section. It has been found in practice that such an arrangement provides for the smoothest transition of fluid through the flutes 28. Careful inspection of the drawings also reveals that the flutes 28 are cut at a relatively close angle to the vertical. Again this has been found in practice to yield the smoothest delivery of material from the cutting face to the surface.
- the wear surfaces 24, 25 are each studded with an array of hardwearing carbide studs 30.
- the wear surfaces 24, 25 and studs 30 together form a pair of reaming bands axially spaced along the reamer part of the tool.
- the studs 30 represent the widest part of the tool 10 and, in use, engage the wall of the drilled holes and bear against the drill hole surface to thereby provide the vibration damping effect.
- the fact that the tool 10 is supported against the hole-face in two spaced apart locations provides a considerable mechanical advantage. By having two points of contact the tool is supported for more securely and the effect of vibration is easily reduced.
- the arrangement as shown in the drawings provides for substantially 360° contact between a reaming surface and the hole-wall. This arises because of the relative sizes of the wear surfaces and the spiral flutes 28.
- a lower left hand stud 32 in one part of the upper wear surface 24 lies almost adjacent a stud 34 in the upper right hand corner of one part of the lower wear surface 25.
- the wear surfaces are able to securely embed themselves in the wall of the drilled hole and thus substantially damp and vibrations that arise through use of the tool.
Landscapes
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Polishing Bodies And Polishing Tools (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
- Earth Drilling (AREA)
- Milling, Broaching, Filing, Reaming, And Others (AREA)
Abstract
Description
- The present invention relates to a vibration damping reamer to be used in the stabilizing of a drilling tool during operation. The vibration damping reamer of the present invention is directed to an arrangement that will damp vibrations arising from use of the drill.
- Reamers have traditionally been employed in earth boring operations for the petroleum industry to provide two main functions:
- The first function that is provided by a reamer is to cut formations to enlarge the bored hole to the desired size, which may be the original size of the bit in the case where the drill bit wears to be under-gauged. However, even for new bits, reamers are employed to cut formations because the bit does not always drill a true bore hole and because of slight lateral shifting which is inherent in the drilling operation, which shifting leaves ledges and other distortions.
- The second function of a reamer is to keep the drill stem in the centre of the hole, that is, the reamer acts as a stabilizer. Stabilizers are positioned above the drill bit to ensure that the drill bit and stabilizer assembly drill a straight hole of the desired diameter. Maintaining the drill stem centered has many beneficial effects, its primary one being minimizing unintentional hole-angle directional drilling.
- A stabilizer thereby extends the life of the drill bit by maintaining the diameter of the hole to the original specification.
- However, traditional reamers have not taken into account the vibrations that arise in the drilling assembly during use. Vibrations induced in the assembly may be lateral vibrations, that is, the assembly moves from side to side during operation; vibrations may also be axial with movement occurring generally vertically, or within the hole. Additionally, torsional vibrations occur resulting from the rotation of the assembly within the hole. Vibrations. Such vibrations may cause damage to the drill assembly reducing the life thereof.
- The present invention provides the public with an alternative to existing reamers.
- Therefore according to a first aspect of the present invention there is provided a vibration damping reamer for use in association with a drill stem and a drill bit in drilling a hole in a rock formation, said vibration damping reamer having:-
- a body having a through going bore for passage of drilling fluids there through; said body having a generally cylindrical upper part adapted from connection to a drill string and a generally cylindrical lowermost reamer part of diameter wider than said upper part, and
- said reamer part including plurality of wear surfaces located on an outer surface thereof that bear against a surrounding drill hole surface and a plurality of spaced apart axially extending spiral flutes cut into said outer surface; wherein said wear surfaces include two or more reaming bands axially spaced along the reamer part.
- By arranging axially spaced reaming bands along the length of the cylindrical body, the reamer is thus is use, brought to bear against the drilled hole-wall at axially spaced positions. The surface of the reamer bears against the hole-wall thereby ensuring any vibrations induced in the tool are damped. The adoption of two or more bearing points, represented by the wear surfaces provides for stability in the position of the reamer and thereby the drill assembly.
- Preferably, reaming bands axially spaced along the reamer part are separated a region of reduced diameter.
- Preferably, said wear surfaces studded with a plurality of hardwearing studs, for example carbide surface studs.
- The vibration damping reamer of the present invention may be embodied as either a near bit vibration damping reamer in which the reamer part is adjacent the drill bit in use, or alternatively as a string reamer in which the reaming part is spaced along the drilling string from the drill bit.
- Preferably, said spaced apart axially extending spiral flutes cut into said outer surface are cut at a high angle relative to thereby minimize the extent of helical movement in fluid moving in the flutes.
- In a particularly preferred embodiment of the present invention the spaced apart axially extending spiral flutes cut into said outer surface are cut, and the distance between adjacent axially spaced wear surfaces are arranged such that, around the circumference of the reamer, a wear surface engages the surrounding hole wall at some point.
- The above and other objects, features, and advantages of the present invention will be apparent from the following detailed description of a preferred embodiment in conjunction with the accompanying drawings. In the drawings:
- Figure 1 illustrates in perspective view, a vibration damping reamer constructed in accordance with the present invention;
- Figure 2 illustrates in side view the vibration damping reamer of figure 1;
- Figure 3 illustrates in side view a body of the vibration damping reamer during manufacture thereof;
- Figure 4 illustrates in side view a reamer part of the body of the vibration damping reamer during manufacture thereof; and
- Figure 5 illustrates a cross-sectional view of the partially constructed reamer shown in figure 4.
- Shown in the drawings is
vibration damping reamer 10 formed in accordance with the present invention. Thereamer 10 is shown to advantage in perspective view in figure 1. Thereamer 10 is used in association with a drill stem and a drill bit in drilling a hole in a rock formation. In the orientation shown a drill is located below thereamer 10. The geometry of thereamer 10 is such a drill bit would be located below thetool 10 with the top of the drill hole beyond the top of the page. Thevibration damping reamer 10 includes abody 12 having a through going bore 14 for passage of drilling fluids there through. Thebore 14 is of appropriate size to allow smooth passage of drilling fluids there through. - The body is divided into a generally cylindrical
upper part 16 adapted for connection to a drill string (not shown) and a generally cylindricallowermost reamer part 18 of diameter wider than theupper part 16. Theupper part 16 has a smooth surface whereas thelowermost reamer part 18 has a complex surfaced described in detail below. Thelowermost reamer part 18 terminates in an inwardlytapered bottom section 20. The diameter of thebottom section 20 is adjusted so as to be consistent with the size of drill bit to which thereamer 10 is attached. - The
reamer part 18 includes anuppermost shoulder section 22 that allows the diameter of the tool as a whole to be increased from the narrowerupper section 16 to the widerlower section 18. - As show in figure 3, during the construction of the tool of the present invention three bands axially spaced thereon distinguish the
lower reamer section 18. An interveningband 26 separates upper andlower wear surfaces band 26 is lesser diameter than thewear surface wear surfaces upper part 16 of thetool 10 and also the interveningband 26. - Five
spiral flutes 28 are cut into the outer surface of thelower reamer part 16. As seen in the drawings thespiral flutes 28 are evenly spaced around the circumference of thetool 10. Thespiral flutes 28 serve to collect drilling fluid and entrained rock material collected from a hole during a drilling operation and to deliver the material to the surface. It can also be observed from figure 5 that thespiral flutes 28 have a slightly squared off cross-section. It has been found in practice that such an arrangement provides for the smoothest transition of fluid through theflutes 28. Careful inspection of the drawings also reveals that theflutes 28 are cut at a relatively close angle to the vertical. Again this has been found in practice to yield the smoothest delivery of material from the cutting face to the surface. - In order to create the desired vibration damping effect the
wear surfaces hardwearing carbide studs 30. Thewear surfaces studs 30 together form a pair of reaming bands axially spaced along the reamer part of the tool. Thestuds 30 represent the widest part of thetool 10 and, in use, engage the wall of the drilled holes and bear against the drill hole surface to thereby provide the vibration damping effect. The fact that thetool 10 is supported against the hole-face in two spaced apart locations provides a considerable mechanical advantage. By having two points of contact the tool is supported for more securely and the effect of vibration is easily reduced. - It is also important to note that the arrangement as shown in the drawings provides for substantially 360° contact between a reaming surface and the hole-wall. This arises because of the relative sizes of the wear surfaces and the spiral flutes 28. Thus, as can be observed in figure 2 a lower
left hand stud 32 in one part of theupper wear surface 24 lies almost adjacent astud 34 in the upper right hand corner of one part of thelower wear surface 25. Thus, in use, the wear surfaces are able to securely embed themselves in the wall of the drilled hole and thus substantially damp and vibrations that arise through use of the tool. - Further advantages and improvements may very well be made to the present invention without deviating from its scope. Although the invention has been shown and described in what is conceived to be the most practical and preferred embodiment, it is recognized that departures may be made there from within the scope and spirit of the invention, which is not to be limited to the details disclosed herein but is to be accorded the full scope of the claims so as to embrace any and all equivalent devices and apparatus.
- In any claims that follow and in the summary of the invention, except where the context requires otherwise due to express language or necessary implication, the world "comprising" is used in the sense of "including", i.e. the features specified may be associated with further features in various embodiments of the invention.
Claims (10)
- A vibration damper reamer stabilizer is used in oilfield borehole drilling, said tool including an outer surface symmetrical to the axis of rotation, said outer surface having a surface that is generally parallel to said axis of rotation. Embedded into said outer surface hard carbide material plurality of such hard material inserts. Said wear surfaces include two or more reaming bands axially spaced along the reamer part. Said reamer part including plurality of wear surfaces located on an outer surface thereof that bear against a surrounding drilled bore hole surface. A vibration Damper body having a through going bore for passage of drilling fluids there through. Said body having a generally cylindrical upper part adapted for connection to a drill string and a generally cylindrical lowermost reamer part of diameter wider than said upper part. Plurality of spaced apart axially extending spiral flutes cut into said outer surface. A Vibration Damper reamer stabilizer have inserts positioned in a helical arrangement on the shoulders in between said grooves. Said tool is threaded at the bottom into and directly on the top of the drill bit. Vibration damper is threaded at the top to the drill stem.
- The vibration damper in claim 1 is an arrangement that will damp vibrations arising from drilling using rotary drill bit.
- The said in claim 1 has two axially spaced gauged sections to nominal hole size cleans and gauges the hole to size using carbide buttons inserted on the tool side.
- Said tool in claim 1 is to keep the drill stem in the centre of drilled hole.
- Said tool in claim 1 stabilizes the drill stem while drilling operation.
- By stabilizing the drill stem inside the hole and keeping it in the bore hole centre, said tool in claim 1 extends the life of the drill bit.
- Vibration Damper in claim 1 cuts down on vibration by minimizing the possible undesired lateral movements of the drill stem while drilling.
- A vibration damper reamer in claim 1 gauges the bore hole into nominal size, once the drill bit does not produce true circular hole due to change in formation forces which was disturbed by creating a hole in the earth formation.
- A vibration damper reamer in claim 1 gauges the bore hole to nominal size, once a change in hole size takes place due to earth formation absorbing drilling fluids from drilling mud.
- A Vibration Damper reamer stabilizer achieves vibration damping using the dome carbides where they anchor to the bore hole side walls to hold the drill string whenever the drill string is pushed by vibrations to the borehole side by lateral vibrations.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE602006003618T DE602006003618D1 (en) | 2006-01-18 | 2006-01-18 | reamer |
AT06001056T ATE414212T1 (en) | 2006-01-18 | 2006-01-18 | BOREHOLE CLEANER |
EP06001056A EP1811125B1 (en) | 2006-01-18 | 2006-01-18 | Borehole reamer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP06001056A EP1811125B1 (en) | 2006-01-18 | 2006-01-18 | Borehole reamer |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1811125A1 true EP1811125A1 (en) | 2007-07-25 |
EP1811125B1 EP1811125B1 (en) | 2008-11-12 |
Family
ID=36385819
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06001056A Active EP1811125B1 (en) | 2006-01-18 | 2006-01-18 | Borehole reamer |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1811125B1 (en) |
AT (1) | ATE414212T1 (en) |
DE (1) | DE602006003618D1 (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2118429A2 (en) * | 2007-02-02 | 2009-11-18 | Halliburton Energy Services, Inc. | Rotary drill bit steerable system and method |
US8162081B2 (en) | 2008-08-28 | 2012-04-24 | Varel International Ind., L.P. | Force balanced asymmetric drilling reamer and methods for force balancing |
EP2801692A1 (en) * | 2013-05-08 | 2014-11-12 | Tercel IP Ltd. | Downhole tool engaging a tubing string between a drill bit and tubular for reaming a wellbore |
CN104736791A (en) * | 2012-05-11 | 2015-06-24 | 特塞尔Ip有限公司 | A downhole downhole assembly, tool and method |
CN104727758A (en) * | 2013-12-20 | 2015-06-24 | 盐城市华谊石油机械有限公司 | Nano-metal centralizer |
CN105102752A (en) * | 2013-03-05 | 2015-11-25 | 三菱综合材料株式会社 | Digging bit |
US9273519B2 (en) | 2012-08-27 | 2016-03-01 | Tercel Ip Ltd. | Downhole dual cutting reamer |
WO2017091241A1 (en) * | 2015-11-23 | 2017-06-01 | COT Acquisition, LLC | Roller reamer |
CN113027362A (en) * | 2021-03-03 | 2021-06-25 | 河南易发石油工程技术有限公司 | Sand removal deflector for well drilling |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104612599A (en) * | 2015-01-27 | 2015-05-13 | 大庆宏富来电气设备制造有限公司 | Eccentric wear prevention wear-resisting centering device for pumping rod |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2217592A (en) * | 1938-08-01 | 1940-10-08 | Lgs Devices Corp | Well reamer |
US4385669A (en) * | 1981-08-21 | 1983-05-31 | Paul Knutsen | Integral blade cylindrical gauge stabilizer reamer |
GB2133062A (en) * | 1982-12-03 | 1984-07-18 | Groom International Limited | Drilling tools |
GB2333542A (en) * | 1998-01-24 | 1999-07-28 | Downhole Products Plc | Tubing shoe with reaming members |
WO2004029402A1 (en) * | 2002-09-30 | 2004-04-08 | Transco Manufacturing Australia Pty Ltd | Combined reamer and drill bit stabiliser |
-
2006
- 2006-01-18 EP EP06001056A patent/EP1811125B1/en active Active
- 2006-01-18 DE DE602006003618T patent/DE602006003618D1/en active Active
- 2006-01-18 AT AT06001056T patent/ATE414212T1/en not_active IP Right Cessation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2217592A (en) * | 1938-08-01 | 1940-10-08 | Lgs Devices Corp | Well reamer |
US4385669A (en) * | 1981-08-21 | 1983-05-31 | Paul Knutsen | Integral blade cylindrical gauge stabilizer reamer |
GB2133062A (en) * | 1982-12-03 | 1984-07-18 | Groom International Limited | Drilling tools |
GB2333542A (en) * | 1998-01-24 | 1999-07-28 | Downhole Products Plc | Tubing shoe with reaming members |
WO2004029402A1 (en) * | 2002-09-30 | 2004-04-08 | Transco Manufacturing Australia Pty Ltd | Combined reamer and drill bit stabiliser |
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2118429A2 (en) * | 2007-02-02 | 2009-11-18 | Halliburton Energy Services, Inc. | Rotary drill bit steerable system and method |
EP2118429A4 (en) * | 2007-02-02 | 2014-07-09 | Halliburton Energy Serv Inc | Rotary drill bit steerable system and method |
US8162081B2 (en) | 2008-08-28 | 2012-04-24 | Varel International Ind., L.P. | Force balanced asymmetric drilling reamer and methods for force balancing |
US9284784B2 (en) | 2012-05-11 | 2016-03-15 | Tercel Ip Ltd. | Downhole assembly, tool and method |
CN104736791A (en) * | 2012-05-11 | 2015-06-24 | 特塞尔Ip有限公司 | A downhole downhole assembly, tool and method |
US9488008B2 (en) | 2012-05-11 | 2016-11-08 | Tercel Ip Ltd. | Downhole assembly, tool and method |
CN104736791B (en) * | 2012-05-11 | 2017-09-08 | 特塞尔Ip有限公司 | Downhole component, tool and method |
EP2847412B1 (en) * | 2012-05-11 | 2021-04-14 | Tercel IP Limited | A downhole assembly, tool and method" |
US9273519B2 (en) | 2012-08-27 | 2016-03-01 | Tercel Ip Ltd. | Downhole dual cutting reamer |
CN105102752A (en) * | 2013-03-05 | 2015-11-25 | 三菱综合材料株式会社 | Digging bit |
CN105102752B (en) * | 2013-03-05 | 2017-11-21 | 三菱综合材料株式会社 | Excavating bur |
US10006251B2 (en) | 2013-03-05 | 2018-06-26 | Mitsubishi Materials Corproation | Digging bit |
EP2801692A1 (en) * | 2013-05-08 | 2014-11-12 | Tercel IP Ltd. | Downhole tool engaging a tubing string between a drill bit and tubular for reaming a wellbore |
CN104727758A (en) * | 2013-12-20 | 2015-06-24 | 盐城市华谊石油机械有限公司 | Nano-metal centralizer |
WO2017091241A1 (en) * | 2015-11-23 | 2017-06-01 | COT Acquisition, LLC | Roller reamer |
CN113027362A (en) * | 2021-03-03 | 2021-06-25 | 河南易发石油工程技术有限公司 | Sand removal deflector for well drilling |
Also Published As
Publication number | Publication date |
---|---|
DE602006003618D1 (en) | 2008-12-24 |
ATE414212T1 (en) | 2008-11-15 |
EP1811125B1 (en) | 2008-11-12 |
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