WO2024000105A1 - Élément formant lame de trépan pdc et trépan pdc - Google Patents

Élément formant lame de trépan pdc et trépan pdc Download PDF

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Publication number
WO2024000105A1
WO2024000105A1 PCT/CN2022/101532 CN2022101532W WO2024000105A1 WO 2024000105 A1 WO2024000105 A1 WO 2024000105A1 CN 2022101532 W CN2022101532 W CN 2022101532W WO 2024000105 A1 WO2024000105 A1 WO 2024000105A1
Authority
WO
WIPO (PCT)
Prior art keywords
blade
assembly
drill bit
injection section
cutting
Prior art date
Application number
PCT/CN2022/101532
Other languages
English (en)
Chinese (zh)
Inventor
陈彬
张伟国
饶志华
严德
陈俊勇
温贵凡
Original Assignee
中海石油深海开发有限公司
深圳新速通石油工具有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 中海石油深海开发有限公司, 深圳新速通石油工具有限公司 filed Critical 中海石油深海开发有限公司
Priority to PCT/CN2022/101532 priority Critical patent/WO2024000105A1/fr
Publication of WO2024000105A1 publication Critical patent/WO2024000105A1/fr

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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
    • E21B10/42—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits
    • 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
    • E21B10/62—Drill bits characterised by parts, e.g. cutting elements, which are detachable or adjustable

Definitions

  • the invention relates to a blade assembly of a PDC drill bit and a PDC drill bit.
  • roller cone bits were used for drilling. As the well depth increases, the rock compaction becomes better and the compressive strength gradually increases. The mechanical drilling speed of the roller cone bit decreases significantly. There is a risk of damaging the roller cone bit during pressurized drilling. And the bearings of roller cone bits have a limited service life; the use of conventional PDC bits in drilling has improved, but as the use time becomes longer and longer, the damage to the cutting teeth of PDC bits caused by pressurized drilling has become more and more prominent, and the cutting teeth have become more and more prominent. After wear, the machine speed is significantly reduced; and because the cutting teeth are welded to the drill bit, the welding process is very demanding. As the compressive strength of the formation increases, the pressure on the cutting teeth becomes greater and greater, and there is a possibility of falling off and failing. Danger.
  • the cutting teeth of the blades on existing drills are mainly made of diamond composite sheets, and then the cutting teeth made of diamond composite sheets are fixed on the blades by welding. During the welding process, if the welding temperature is too high, , the diamond composite sheet will become carbonized and fail.
  • the object of the present invention is to provide a blade assembly of a PDC drill bit and a PDC drill bit in which the mounting ends of the cutting teeth are rotatably assembled in the mounting holes on the blade and rotate on the drill bit body. During the process, the cutting edges of the cutting teeth can rotate.
  • a blade assembly of a PDC drill bit including a blade and a number of cutting teeth.
  • the blade is provided with a number of assembly holes; each cutting tooth is assembled in each assembly hole in a one-to-one correspondence; one end of the cutting tooth is formed with a The cutting head of the cutting edge; the other end of the cutting tooth is formed as an assembly end, and the assembly end is rotatably inserted into the assembly hole and detachably connected to the assembly hole.
  • the assembly hole penetrates from one side of the blade to the other side of the blade; the assembly end penetrates from one end of the assembly hole and passes out from the other end of the assembly hole, and the assembly end
  • the part that passes through the assembly hole is provided with a connecting piece, and the connecting piece is used to abut against the side of the blade to prevent the assembly end from being separated from the assembly hole.
  • a groove is provided at the part of the assembly end that passes through the assembly hole; the connecting piece is provided in the groove and abuts against the side of the blade.
  • the connecting member is a circlip, and the circlip is sleeved in the groove and abuts against the side of the blade.
  • the blade is further provided with a housing, and the housing is detachably covered on the side of the blade away from the cutting head to prevent the assembly end from being exposed.
  • a plurality of docking grooves are provided on the inside of the housing, and the plurality of coupling grooves are used to correspond one-to-one with a plurality of assembly holes after the housing is covered on the side of the blade; each assembly end passes through each assembly hole. The hole extends into the docking groove.
  • the plurality of assembly holes are spaced apart in the length direction of the blade.
  • a PDC drill bit includes a drill bit body and a plurality of blade assemblies, and the blades are arranged on the drill body.
  • the drill bit body is provided with a number of nozzles and a number of flow channels.
  • the nozzles include nozzle seats and nozzle heads.
  • the nozzle seats of the several nozzles are detachably installed in the several flow channels in a one-to-one correspondence; the nozzle heads are connected in the nozzle seat and connected with the flow channel.
  • a first injection section and a second injection section are provided in the nozzle head, and the first injection section communicates with the flow channel; the second injection section and the first injection section are arranged at an angle and communicate with each other. .
  • the nozzle head is provided with a first injection section and a second injection section, the first injection section is connected with the flow channel; the second injection section is connected with the first injection section, and the second injection section is connected with the first injection section.
  • the inner wall gradually slopes outward from close to the first injection section to away from the first injection section.
  • the beneficial effects of the present invention are that the assembly ends of the cutting teeth can be rotatably assembled in the assembly holes on the blades, and during the rotation of the drill bit body, the cutting edges of the cutting teeth can rotate and cut the formation.
  • the cutting edge can rotate around its own axis, it can cut at constantly changing positions around the circumference, keeping the cutting edge sharp and long-life.
  • the assembly end of the cutting teeth is passed through the assembly hole of the blade for a detachable turntable, and is fixed without welding to avoid diamond carbonization and performance degradation caused by excessive temperature during welding.
  • Figure 1 is a schematic structural diagram of the present invention
  • Figure 2 is a schematic diagram of Figure 1 from another perspective
  • Figure 3 is a schematic structural diagram of the present invention after hiding the casing
  • Figure 4 is a schematic structural diagram of another perspective of Figure 3;
  • Figure 5 is a schematic structural diagram of the drill bit body and blades of the present invention.
  • Figure 6 is a cross-sectional view of the blade of the present invention.
  • Figure 7 is a schematic structural diagram of the nozzle of the present invention.
  • Figure 8 is another structural schematic diagram of the nozzle of the present invention.
  • a blade assembly of a PDC drill bit includes a blade 10 and a plurality of cutting teeth 20.
  • a number of assembly holes 12 can be provided on the blade 10, and each cutting tooth 20 can be assembled in one-to-one correspondence. in each assembly hole 12.
  • one end of the cutting tooth 20 is formed as a cutting head 21 with a cutting edge in the circumferential direction of the cutting head 21, and the other end of the cutting tooth 20 is formed as an assembly end 22, and the assembly end 22 is rotatably connected to the assembly.
  • the assembly end 22 of the cutting tooth 20 can be detachably connected with the assembly hole 12 .
  • the blade 10 of the blade assembly is arranged on the PDC drill bit body 30, and the assembly end 22 of the cutting tooth 20 can be assembled on the assembly of the blade 10
  • Cutting teeth 20 can be assembled in the holes 12 and in each assembly hole 12 of the blade 10, ensuring that more cutting teeth 20 can be distributed on the blade 10 and maintaining the cutting force of the blade 10.
  • the assembly end 22 of the cutting teeth 20 is rotatably assembled in the assembly hole 12 on the blade 10.
  • the cutting edge of the cutting teeth 20 can rotate.
  • the cutting edge can rotate around its own axis. It can cut at constantly changing positions on the circumference, keeping the cutting edge sharp and having a long service life.
  • the assembly end 22 of the cutting tooth 20 is inserted into the assembly hole 12 of the blade 10 for detachable rotation and is fixed without welding to avoid diamond carbonization and performance degradation due to excessive temperature during welding.
  • the assembly hole 12 in this embodiment runs from one side of the blade 10 to the other side of the blade 10 , so that when the cutting teeth 20 are assembled, the assembly end 22 of the cutting teeth 20 It can be inserted through one end of the assembly hole 12 and then passed out through the other end of the assembly hole 12 .
  • a connector is provided at the portion of the assembly end 22 that passes through the assembly hole 12 . The connector is used to abut against the side of the blade 10 to prevent the assembly end 22 from being separated from the assembly hole 12 .
  • the mounting end 22 of the cutting tooth 20 can be inserted through one end of the mounting hole 12, and the mounting end 22 can then pass through the mounting hole 12.
  • the connector can be assembled, and the connector can abut against the side of the blade 10.
  • the cutting head 21 of the cutting tooth 20 can abut the other side of the blade 10, that is, the assembly end 22 of the cutting tooth 20 can be connected to the blade through the connector.
  • Blade 10 is assembled.
  • the assembly end 22 of the above-mentioned cutting tooth 20 and the assembly hole 12 can adopt a shaft hole clearance fit to achieve rotation fit.
  • a groove 221 can be provided at the part of the assembly end 22 that passes through the assembly hole 12 .
  • the connector can be installed in the groove 221 and then abut against the side of the blade 10 .
  • the groove 221 is an annular groove
  • the connector can be installed into the annular groove 221 and abutted against the side of the blade 10 in the circumferential direction, making the assembly structure more stable.
  • the above-mentioned connecting member is a circlip 23.
  • the circlip 23 can be placed in the groove 221 and abutted against the side of the blade 10.
  • the structure of the circlip 23 can be used for disassembly and assembly. On the one hand, the cost is lower, and on the other hand, the circlip 23 is disassembled and assembled.
  • the circlip 23 has a certain degree of elasticity, is easy to disassemble and assemble, and can provide a certain buffer when receiving force.
  • a threaded section can also be provided at the end of the assembly end 22 that protrudes from the assembly hole 12, and a nut can be screwed into the threaded section that protrudes from the assembly hole 12 at the assembly end 22.
  • the detachable assembly of the assembly end 22 can also be achieved.
  • the nut structure is formed into the above-mentioned connector.
  • a housing 11 may also be provided on the blade 10 .
  • the housing 11 is detachably covered on the side of the blade 10 away from the cutting head 21 to prevent the assembly end 22 from being exposed. Even after the assembly end 22 of the cutting tooth 20 is assembled with the assembly hole 12, since the connecting piece abuts against the side of the blade 10, the connecting structure will be exposed. During the drilling process of the blade 10 of the drill bit body 30, rock breaking will occur. The debris may enter the assembly gap between the connecting piece and the assembly hole 12, causing the cutting teeth 20 to get stuck. Therefore, the housing 11 can be assembled on the blade 10, and the assembly structure of the connector and the assembly end 22 can be covered on the inside. On the one hand, the overall appearance of the drill bit body 30 can be improved, and on the other hand, debris can be prevented from entering during the drilling process and affecting the cutting. The rotational performance of the teeth 20.
  • a perforation can be provided on the housing 11 , and a threaded hole can be provided on the side of the blade 10 .
  • a threaded hole can be provided on the side of the blade 10 .
  • a number of docking grooves 111 can also be provided inside the housing 11. After the housing 11 is covered on the side of the blade 10, the several docking grooves 111 can correspond to a number of assembly holes 12. Each assembly end 22 of the cutting tooth 20 extends into the docking groove 111 after passing through each assembly hole 12. That is, after the assembly end 22 of the cutting tooth 20 is installed in the assembly hole 12, it can be further connected by the docking on the housing 11.
  • the groove 111 is used for limiting, preventing the cutting teeth 20 from swinging left and right, and the assembly structure of the cutting teeth 20 is more stable.
  • the above-mentioned plurality of assembly holes 12 can be spaced apart in the length direction of the blade 10 , that is, after the cutting teeth 20 are correspondingly assembled in each assembly hole 12 , they can be spaced apart in the length direction of the blade 10 .
  • Several cutting teeth 20 make the cutting force more uniform and stable during the drilling process of the drill bit body 30 .
  • a PDC drill bit as shown in Figures 1-8 includes a drill bit body 30 and a plurality of blade assemblies in the embodiment.
  • the blades 10 of each blade assembly are arranged on the drill bit body 30.
  • Drill bit set the blade 10 of the blade assembly on the PDC drill bit body 30, the assembly end 22 of the cutting tooth 20 can be assembled in the assembly hole 12 of the blade 10, and each assembly hole 12 of the blade 10 can be assembled
  • the cutting teeth 20 ensure that more cutting teeth 20 can be distributed on the blade 10 to maintain the cutting force of the blade 10 .
  • the assembly end 22 of the cutting teeth 20 is rotatably assembled in the assembly hole 12 on the blade 10.
  • the cutting edge of the cutting teeth 20 can rotate.
  • the cutting edge can rotate around its own axis. It can cut at constantly changing positions on the circumference, keeping the cutting edge sharp and having a long service life.
  • the assembly end 22 of the cutting tooth 20 is inserted into the assembly hole 12 of the blade 10 for detachable rotation and is fixed without welding to avoid diamond carbonization and performance degradation due to excessive temperature during welding.
  • a number of nozzles 31 and a number of flow channels 32 can be provided on the drill bit body 30 .
  • the specific nozzle 31 includes a nozzle seat 312 and a nozzle head 311 .
  • the nozzle seats 312 of the several nozzles 31 can correspond to each other one by one. It is installed in a plurality of flow channels 32 of the drill bit body 30, and the nozzle seat 312 is detachably installed in a plurality of flow channels 32.
  • the nozzle head 311 can be inserted into the nozzle seat 312 and communicate with the flow channel 32 .
  • the nozzle head 311 and the nozzle seat 312 of the nozzle 31 in this embodiment are assembled in a separate manner, and the nozzle seat 312 (made of stainless steel) ) can be screwed into the flow channel 32 of the drill bit body 30 in a threaded manner, and can withstand greater torque without being broken.
  • the nozzle head 311 and the nozzle seat 312 adopt a separate structure, during assembly, only the nozzle seat 312 bears force, and the nozzle head 311 does not.
  • the carbide can be made thinner, and the spray inside the nozzle head 311
  • the flow channel can be diffused or curved to achieve a larger injection area and angle.
  • the nozzle head 311 is provided with a first injection section 313 and a second injection section 314.
  • the first injection section 313 is connected with the flow channel 32; the second injection section 314 is sandwiched between the first injection section 313 and the first injection section 313.
  • the angle is set and penetrated, that is, the jet flow channel of the nozzle head 311 is set in a curved manner and sprays in a non-linear manner, and the drilling fluid flowing out of the nozzle 31 is sprayed at a larger angle.
  • the nozzle head 311 can also adopt another structure, that is, the nozzle head 311 is provided with a first injection section 313 and a second injection section 314, and the first injection section 313 is connected with the flow channel 32;
  • the injection section 314 is connected with the first injection section 313, and the inner wall of the second injection section 314 gradually slopes outward from close to the first injection section 313 to away from the first injection section 313.
  • the injection channel of the nozzle head 311 forms a diffuse injection.
  • the drilling fluid flowing out of the nozzle 31 has a larger injection area.
  • the side anti-collision and gauge block of the drill bit body 30 can be used to ensure the side anti-collision performance of the drill bit body 30 during drilling.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Drilling Tools (AREA)

Abstract

Un élément lame d'un trépan PDC et un trépan PDC sont décrits. L'élément formant lame comprend une lame (10) et une pluralité de dents de coupe (20) ; la lame (10) est pourvue d'une pluralité de trous d'assemblage (12) ; les dents de coupe (20) sont assemblées dans les trous d'assemblage (12) en correspondance biunivoque ; une extrémité de chaque dent de coupe (20) est façonnée sous la forme d'une tête de coupe (21) présentant un bord de coupe, et l'autre extrémité de la dent de coupe (20) est façonnée sous la forme d'une extrémité d'assemblage (22) ; et les extrémités d'assemblage (22) passent de manière rotative à travers les trous d'assemblage (12) et sont reliées de manière amovible aux trous d'assemblage (12). Le trépan PDC comprend un corps de trépan (30) et une pluralité d'éléments formant lame ; une pluralité de lames (10) est disposée sur le corps de trépan (30) ; les extrémités d'assemblage (22) des dents de coupe (20) sont assemblées de manière rotative dans les trous d'assemblage (12) présents sur les lames (10) ; et lors du processus de rotation du corps de trépan (30), les bords de coupe des dents de coupe (20) peuvent tourner.
PCT/CN2022/101532 2022-06-27 2022-06-27 Élément formant lame de trépan pdc et trépan pdc WO2024000105A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2022/101532 WO2024000105A1 (fr) 2022-06-27 2022-06-27 Élément formant lame de trépan pdc et trépan pdc

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2022/101532 WO2024000105A1 (fr) 2022-06-27 2022-06-27 Élément formant lame de trépan pdc et trépan pdc

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WO2024000105A1 true WO2024000105A1 (fr) 2024-01-04

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002155692A (ja) * 2000-11-20 2002-05-31 Koken Boring Mach Co Ltd 打撃掘削用ビット及びリトラクトビット
CN202170754U (zh) * 2011-06-10 2012-03-21 兰文卿 高强高硬组合型喷嘴
CN105840106A (zh) * 2016-04-14 2016-08-10 西南石油大学 用于pdc钻头实现金刚石复合齿可拆装的固定方法
CN108138544A (zh) * 2015-09-29 2018-06-08 史密斯国际有限公司 旋转切削结构以及用于保持其的结构

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002155692A (ja) * 2000-11-20 2002-05-31 Koken Boring Mach Co Ltd 打撃掘削用ビット及びリトラクトビット
CN202170754U (zh) * 2011-06-10 2012-03-21 兰文卿 高强高硬组合型喷嘴
CN108138544A (zh) * 2015-09-29 2018-06-08 史密斯国际有限公司 旋转切削结构以及用于保持其的结构
CN105840106A (zh) * 2016-04-14 2016-08-10 西南石油大学 用于pdc钻头实现金刚石复合齿可拆装的固定方法

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