CN105317377A - Center differential pressure type drill bit - Google Patents
Center differential pressure type drill bit Download PDFInfo
- Publication number
- CN105317377A CN105317377A CN201510790611.5A CN201510790611A CN105317377A CN 105317377 A CN105317377 A CN 105317377A CN 201510790611 A CN201510790611 A CN 201510790611A CN 105317377 A CN105317377 A CN 105317377A
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- Prior art keywords
- drill bit
- bit
- pilot
- bizet
- joint
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Links
- 238000005553 drilling Methods 0.000 claims abstract description 54
- 230000005540 biological transmission Effects 0.000 claims abstract description 36
- 239000012530 fluid Substances 0.000 claims description 26
- 238000007789 sealing Methods 0.000 claims description 12
- 230000001105 regulatory effect Effects 0.000 claims description 9
- 210000002445 nipple Anatomy 0.000 claims description 8
- 239000011435 rock Substances 0.000 claims description 3
- 241001484259 Lacuna Species 0.000 claims description 2
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 5
- 239000011229 interlayer Substances 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000010276 construction Methods 0.000 abstract description 2
- 239000003208 petroleum Substances 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 6
- 230000035515 penetration Effects 0.000 description 4
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005315 distribution function Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009527 percussion Methods 0.000 description 1
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
- E21B10/32—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools
-
- 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
- E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
Landscapes
- 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)
- Earth Drilling (AREA)
Abstract
The invention belongs to the field of petroleum engineering, and particularly relates to a center differential pressure type drill bit. The center differential pressure type drill bit comprises a reaming drill bit body, a pressure adjusting spring, a flow division and force transmission assembly and a pilot drill bit body, wherein the pilot drill bit body and the flow division and force transmission assembly are connected into a whole and installed in an axial torque transferring hole in the reaming drill bit body, and the pilot drill bit body protrudes out of the crown part of the reaming drill bit body; the pressure adjusting spring is arranged between the top end of the flow division and force transmission assembly and the lower end of a connector of the reaming drill bit body; the reaming drill bit body can be arranged to be of a one-stage or multi-stage type. The center differential pressure type drill bit is simple in principle and structure, wide in application range and capable of being applied to various stratums, and the using effect is better in a multi-interlayer stratum; the center differential pressure type drill bit can be used together with a pulse jet flow generator to further increase the drilling speed; in the drilling process, operation construction is completely the same as that of conventional drilling, and special requirements for a ground facility, a drilling string and the drill bit type are eliminated, which is beneficial for using and popularizing the drill bit.
Description
Technical field
The invention belongs to petroleum works field, particularly, relate to a kind of equation of the ecentre pressure type drill bit.
Background technology
Situ of drilling well practice shows, discharges the efficiency of breaking rock that downhole formation stress effectively can improve drill bit in advance, and then improves bit speed.For this reason, Chinese scholars proposes two kinds of methods for discharging shaft bottom stress in advance, a method for the release reservoir stress based on hydraulic energy, with pulse cavitating jet speed-raising technology, the speed-raising of super-high pressure pulse jet technology, abradant jet speed-raising technology etc. for representative; Another kind changes bottom-hole stress field thus the method for release reservoir stress, with reaming while drilling technology, two-stage PDC bit drilling technology etc. for representative by changing bottom hole pattern.Need to connect special tool above drill bit with hydraulic energy release reservoir stress, this not only changes bottom hole assemblies and forms, and consumes drilling fluid hydraulic energy to a certain extent, and can not be widely used in various well type, limits its application scenario; Utilize the method changing wellbore shape change bottom-hole stress field only to need can reach by optimal design drill-shape or drilling assembly the effect that release reservoir stress improves bit speed, its development prospect is wide.But existing reaming while drilling drilling assembly and two-stage PDC bit do not possess the automatic distribution function of the pressure of the drill and the automatic regulation function of drilling speed, fail speed-increasing effect to carry to the best.Therefore, need badly and a kind ofly can possess the pressure of the drill self-adjusted block and drilling speed regulates automatically in many interlayers stratum drill bit to meet the needs of Different Strata, different well type well drilling speed in even stratum.
Summary of the invention
For overcoming the above-mentioned defect that prior art exists, the invention provides a kind of equation of the ecentre pressure type drill bit, the contained spring elastic force of drill bit is utilized to realize the distribution automatically and reasonably of the pressure of the drill between pilot bit and re-drill bit, attainable motion to axial between pilot bit and re-drill bit is utilized to realize the automatic adjustment of drilling speed between two drill bits, automatically pilot bit and re-drill bit the pressure of the drill are distributed and be adjusted to the best, rate of penetration controlled extremely the most rationally, and then reach the object of raising rate of penetration.
For achieving the above object, the present invention adopts following proposal:
Equation of the ecentre pressure type drill bit, comprising: re-drill bit, pressure regulating spring, shunting power transmission assembly, pilot bit; Pilot bit links into an integrated entity with shunting power transmission assembly, and be installed in the axial torsion pass hole of re-drill bit, pilot bit protrudes from re-drill bit bizet; Pressure regulating spring is located between shunting power transmission assembly top and re-drill bit joint lower end; Re-drill bit can arrange one-level or multistage.
Relative to prior art, the present invention has following beneficial effect:
1, theory and structure is simple, does not need to install other instruments, does not affect the enforcement of other drilling well operation;
2, applied widely, can be used for the various well type such as straight well, directional well, can drill collar be directly connected in, can also with the instruments such as power drilling tool, pulsing jet generating means with the use of;
3, can be applicable to various stratum, its result of use is better in many interlayers stratum;
4, can use together with pulsing jet generating means, utilize the power that pulsing jet provides periodicity to shake for pilot bit, thus realize pilot bit rotary percussion drilling effect, improve bit speed further;
5, in drilling process, operation construction is identical with conventional drilling, does not have particular/special requirement, be conducive to popularization and the use of drill bit to ground installation, well drilling pipe column, bite type.
Accompanying drawing explanation
Fig. 1 is equation of the ecentre pressure type drill bit (twin-stage) structural representation;
Fig. 2 is A-A sectional drawing in Fig. 1;
Fig. 3 is equation of the ecentre pressure type drill bit (three grades) structural representation;
In figure: 1, re-drill bit, 2, pressure regulating spring, 3, power transmission assembly is shunted, 4, pilot bit, 101, re-drill bit joint, 102, re-drill bit bizet, 103, re-drill bit nozzle, 301, shunting disk, 302, rectifying cavity, 401, pilot bit joint, 402, pilot bit bizet, 11, one-level pilot bit, 111, a level shunt power transmission assembly, 112, first class pressure regulating spring, 113, one-level re-drill bit, 211, two level shunt power transmission assemblies, 212, secondary pressure regulating spring.213, secondary re-drill bit.
Detailed description of the invention
As shown in Figure 1, equation of the ecentre pressure type drill bit, comprising: re-drill bit 1, pressure regulating spring 2, shunting power transmission assembly 3, pilot bit 4; Pilot bit 4 is threaded integral with shunting power transmission assembly 3, and be installed in the axial torsion pass hole of re-drill bit 1, pilot bit 4 protrudes from re-drill bit 1 bizet; Pressure regulating spring 2 is located between shunting power transmission assembly 3 top and re-drill bit joint 101 lower end; Re-drill bit can arrange one-level or multistage, and Fig. 1 arranges one-level re-drill bit, and Fig. 3 arranges secondary re-drill bit; Equation of the ecentre pressure type drill bit utilizes its internal pressure to regulate elastic force to realize the distribution automatically and reasonably of the pressure of the drill between pilot bit and re-drill bit, utilizing can realize moving to axial between pilot bit and re-drill bit realizes the automatic adjustment of drilling speed between two drill bits, pilot bit and re-drill bit the pressure of the drill are distributed and is automatically adjusted to the best, rate of penetration controlled to the most reasonable, and then reach the object improving rate of penetration.
Re-drill bit 1, comprising: re-drill bit joint 101, re-drill bit bizet 102, and re-drill bit joint 101, re-drill bit bizet 102 fix as one.
Re-drill bit joint 101 outer upper is drilling tool connecting thread, middle part is be affixed joint face with the joint body of upper clasp forceps mouth, bottom, drilling tool connecting thread is used for drill bit and is connected with top drilling tool, joint body is that drill bit applies moment of torsion when being used for dismounting drill bit, and affixed joint face is re-drill bit joint 101, re-drill bit bizet 102 is affixed provides interface; The inner side of re-drill bit joint 101 is followed successively by from top to bottom: drilling fluid runner, spring pressure-bearing step surface, spring outer protection cylinder; Drilling fluid runner is used for providing fluid space for drilling fluid, and spring pressure-bearing step surface is used for providing stressed support for spring, and spring outer protection cylinder is that spring activity space is spacing.
Re-drill bit bizet 102 outer tip end is the affixed joint face of re-drill bit, and bottom is drill bit hat; The affixed joint face shape complementarity of the affixed joint face of re-drill bit and re-drill bit joint 101, realizes the affixed of re-drill bit bizet 102 and re-drill bit joint 101; The crown shape of drill bit is according to stratum changing features, identical with normal drill bit; The axial inner top side of re-drill bit bizet 102 is circular hole, and lower end is torsion pass hole; Re-drill bit bizet 102 upper end circular port diameter is identical with the spring outer protection cylinder diameter of re-drill bit joint 101; Bottom the through re-drill bit bizet 102 in torsion pass hole, re-drill bit bizet 102 lower end, torsion pass hole shape of cross section is structure or of bonding structure in many ways; Re-drill bit bizet 102 inner top side circular hole has nozzle flow channel to bit wing wing root portion, re-drill bit bizet 102 bottom, and nozzle flow channel bottom is provided with re-drill bit nozzle 103.
Shunting power transmission assembly 3 is installed in the circular port hole of re-drill bit bizet 102 inside, can be slightly movable up and down relative to re-drill bit along re-drill bit axis direction, but circumference does not produce relative rotation; Shunting power transmission assembly 3 outer upper is righting sealing surface, and middle part is shunting load pipe nipple confined planes, and bottom is torsion pass bearing torque face; Righting sealing surface coordinates with the circular hole of re-drill bit bizet 102 inner top side, ensures that re-drill bit bizet 102 does not produce radial direction with shunting power transmission assembly 3 and rocks; Righting sealing surface has seal groove, in seal groove, sealing is installed; Shunting load pipe nipple confined planes diameter is less than righting sealing surface, but be greater than torsion pass bearing torque face circumscribed circle diameter, the step formed between shunting load pipe nipple confined planes and torsion pass bearing torque face limits shunts displacement size to axial between power transmission assembly 3 and re-drill bit bizet 102, and prevents shunting power transmission assembly 3 from deviating from re-drill bit bizet 102; Torsion pass bearing torque face coordinates with shunting power transmission assembly 3 lower end torsion pass interporal lacuna, for re-drill bit bizet 102 moment of torsion being passed to shunting power transmission assembly 3; Shunting power transmission assembly 3 inside upper part is shunting disk 301, and middle part is pilot bit drilling fluid runner, and bottom is pilot bit drilling tool junction button; Shunting disk 301 and righting sealing surface and shunt between step surface that load pipe nipple confined planes forms and have re-drill bit drilling fluid flowing hole, for part drilling fluid is delivered to drilling fluid rectifying cavity 302; Pilot bit drilling fluid runner is used for for shunting provides runner to the drilling fluid of pilot bit, and the pilot bit drilling tool junction button of shunting power transmission assembly 3 is for connecting pilot bit assembly.
Spring 2 is positioned at re-drill bit body, installs between shunting power transmission assembly 3 top and the step surface of re-drill bit joint 101 inside lower end.
Pilot bit 4, comprising: pilot bit joint 401, pilot bit bizet 402, and pilot bit joint 401, pilot bit bizet 402 fix as one;
Top outside pilot bit joint 401 is pilot bit connecting thread, middle part is pilot bit joint body, bottom is the affixed joint face of pilot bit, pilot bit drilling tool connecting thread is for connecting pilot bit bizet 402 and shunting power transmission assembly 3, pilot bit joint body is that pilot bit applies moment of torsion when being used for dismounting pilot bit, and the affixed joint face of pilot bit is pilot bit joint 401, pilot bit bizet 402 is affixed provides space; There is drilling fluid runner the inner side of pilot bit joint 401, and this runner is used for providing fluid space for drilling fluid.
Pilot bit bizet 402 outer upper end is the affixed joint face of pilot bit, and lower end is neck eye drill bit hat; The affixed joint face shape complementarity of the affixed joint face of pilot bit and pilot bit joint 401, for realizing the affixed of pilot bit bizet 402 and pilot bit joint 401; The crown shape of drill bit is according to stratum changing features, identical with normal drill bit; Pilot bit bizet 402 inner top side is drilling fluid flowing hole, has bit nozzle runner between pilot bit bizet 402 inner top side drilling fluid flowing hole and pilot bit wing root, and pilot bit nozzle flow channel bottom is provided with pilot bit nozzle.
As shown in Figure 3, the pilot bit of Fig. 1 equation of the ecentre pressure type drill bit (twin-stage) is replaced by minor diameter equation of the ecentre pressure type drill bit (twin-stage) and forms tertiary centre differential pressure type drill bit; According to aforesaid way, the pilot bit of tertiary centre differential pressure type drill bit is replaced by the equation of the ecentre pressure type drill bit (twin-stage) of more minor diameter, quaternary center differential pressure type drill bit can be formed.Multilevel center differential pressure type drill bit can be constructed according to the method.
Claims (10)
1. an equation of the ecentre pressure type drill bit, comprising: re-drill bit, pressure regulating spring, shunting power transmission assembly, pilot bit; It is characterized in that: pilot bit links into an integrated entity with shunting power transmission assembly, and be installed in the axial torsion pass hole of re-drill bit, pilot bit protrudes from re-drill bit bizet; Pressure regulating spring is located between shunting power transmission assembly top and re-drill bit joint lower end; Re-drill bit can arrange one-level or multistage.
2. equation of the ecentre pressure type drill bit according to claim 1, it is characterized in that: re-drill bit comprises re-drill bit joint and re-drill bit bizet, re-drill bit joint, re-drill bit bizet fix as one.
3. the equation of the ecentre pressure type drill bit according to claim 1-2, is characterized in that: re-drill bit joint outer upper is drilling tool connecting thread, middle part is be affixed joint face with the joint body of upper clasp forceps mouth, bottom; The inner side of re-drill bit joint is followed successively by from top to bottom: drilling fluid runner, spring pressure-bearing step surface, spring outer protection cylinder.
4. the equation of the ecentre pressure type drill bit according to claim 1-3, is characterized in that: re-drill bit bizet outer tip end is the affixed joint face of re-drill bit, and bottom is drill bit hat; The affixed joint face shape complementarity of the affixed joint face of re-drill bit and re-drill bit joint, realizes the affixed of re-drill bit bizet and re-drill bit joint; The crown shape of drill bit is according to stratum changing features, and the axial inner top side of re-drill bit bizet is circular hole, and lower end is torsion pass hole; Re-drill bit bizet upper end circular port diameter is identical with the spring outer protection cylinder diameter of re-drill bit joint; Bottom the through re-drill bit bizet in torsion pass hole, re-drill bit bizet lower end, torsion pass hole shape of cross section is structure or of bonding structure in many ways; Re-drill bit bizet inner top side circular hole has nozzle flow channel to bit wing wing root portion, re-drill bit bizet bottom, and nozzle flow channel bottom is provided with re-drill bit nozzle.
5. the equation of the ecentre pressure type drill bit according to claim 1-4, it is characterized in that: shunting power transmission assembly is installed in the circular port hole of re-drill bit bizet inside, can be slightly movable up and down relative to re-drill bit along re-drill bit axis direction, but circumference does not produce relative rotation; Shunting power transmission assembly outer upper is righting sealing surface, and middle part is shunting load pipe nipple confined planes, and bottom is torsion pass bearing torque face; Righting sealing surface coordinates with the circular hole of re-drill bit bizet inner top side, ensures that re-drill bit bizet does not produce radial direction with shunting power transmission assembly and rocks; Righting sealing surface has seal groove, in seal groove, sealing is installed; Shunting load pipe nipple confined planes diameter is less than righting sealing surface, but be greater than torsion pass bearing torque face circumscribed circle diameter, the step formed between shunting load pipe nipple confined planes and torsion pass bearing torque face limits shunts displacement size to axial between power transmission assembly and re-drill bit bizet, and prevents shunting power transmission assembly from deviating from re-drill bit bizet; Torsion pass bearing torque face coordinates with shunting power transmission assembly lower end torsion pass interporal lacuna, re-drill bit bizet moment of torsion is passed to shunting power transmission assembly; Shunting power transmission assembly inside upper part is shunting disk, and middle part is pilot bit drilling fluid runner, and bottom is pilot bit drilling tool junction button; Shunting disk and righting sealing surface and shunt between step surface that load pipe nipple confined planes forms and have re-drill bit drilling fluid flowing hole, for part drilling fluid is delivered to drilling fluid rectifying cavity; Pilot bit drilling fluid runner is used for for shunting provides runner to the drilling fluid of pilot bit, and the pilot bit drilling tool junction button of shunting power transmission assembly is for connecting pilot bit assembly.
6. the equation of the ecentre pressure type drill bit according to claim 1-4, is characterized in that: spring is positioned at re-drill bit body, installs between shunting power transmission assembly top and the step surface of re-drill bit joint inside lower end.
7. the equation of the ecentre pressure type drill bit according to claim 1-6, is characterized in that: pilot bit, comprising: pilot bit joint, pilot bit bizet, and pilot bit joint, pilot bit bizet fix as one.
8. the equation of the ecentre pressure type drill bit according to claim 1-7, it is characterized in that: the top outside pilot bit joint is pilot bit connecting thread, middle part is pilot bit joint body, bottom is the affixed joint face of pilot bit, and there is drilling fluid runner the inner side of pilot bit joint.
9. the equation of the ecentre pressure type drill bit according to claim 1-8, is characterized in that: pilot bit bizet outer upper end is the affixed joint face of pilot bit, and lower end is neck eye drill bit hat; The affixed joint face shape complementarity of the affixed joint face of pilot bit and pilot bit joint, realizes the affixed of pilot bit bizet and pilot bit joint; The crown shape of drill bit is according to stratum changing features, pilot bit bizet inner top side is drilling fluid flowing hole, have bit nozzle runner between pilot bit bizet inner top side drilling fluid flowing hole and pilot bit wing root, pilot bit nozzle flow channel bottom is provided with pilot bit nozzle.
10. the equation of the ecentre pressure type drill bit according to claim 1-9, is characterized in that: the pilot bit of two equation of the ecentre pressure type drill bit is replaced by minor diameter equation of the ecentre pressure type drill bit and forms tertiary centre differential pressure type drill bit; According to aforesaid way, the pilot bit of tertiary centre differential pressure type drill bit is replaced by the twin-stage equation of the ecentre pressure type drill bit of more minor diameter, quaternary center differential pressure type drill bit can be formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510790611.5A CN105317377B (en) | 2015-11-17 | 2015-11-17 | Center differential pressure type drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510790611.5A CN105317377B (en) | 2015-11-17 | 2015-11-17 | Center differential pressure type drill bit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105317377A true CN105317377A (en) | 2016-02-10 |
| CN105317377B CN105317377B (en) | 2017-08-04 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510790611.5A Active CN105317377B (en) | 2015-11-17 | 2015-11-17 | Center differential pressure type drill bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105317377B (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106703701A (en) * | 2017-01-20 | 2017-05-24 | 中国石油大学(华东) | Pulse impact producing mechanism and center differential pressure drill comprising same |
| CN107386960A (en) * | 2017-08-04 | 2017-11-24 | 四川深远石油钻井工具股份有限公司 | A kind of drilling speed device with composite drill bit |
| CN107386961A (en) * | 2017-08-04 | 2017-11-24 | 四川深远石油钻井工具股份有限公司 | A kind of drilling speed device |
| CN108278078A (en) * | 2018-02-05 | 2018-07-13 | 中国石油大学(北京) | Ultrasonic wave high-frequency percussion drilling rig |
| CN109594927A (en) * | 2018-12-21 | 2019-04-09 | 巴州大朴石油技术服务有限公司 | A kind of elastic drill bit for oil exploitation |
| CN111608589A (en) * | 2020-05-19 | 2020-09-01 | 中国石油化工股份有限公司石油工程技术研究院 | Bottom hole stress induction unloading drill bit and method for improving drilling speed thereof |
| CN112020594A (en) * | 2018-03-26 | 2020-12-01 | 诺瓦泰克Ip有限责任公司 | Wellbore cross-section manipulation |
| CN114753769A (en) * | 2022-04-15 | 2022-07-15 | 中国石油化工股份有限公司 | Drill bit based on central multi-edge-tooth modulated pulse jet and drilling method thereof |
| CN115324485A (en) * | 2022-10-17 | 2022-11-11 | 成都迪普金刚石钻头有限责任公司 | Self-adaptive PDC composite drill bit |
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| CN104234632A (en) * | 2014-08-21 | 2014-12-24 | 张陈泓 | Bottom reaming bit |
| CN204716136U (en) * | 2015-05-13 | 2015-10-21 | 固安飞腾机械制造有限公司 | A kind of Anchor rod base-enlarging drill bit |
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| CN1617973A (en) * | 2001-07-16 | 2005-05-18 | 国际壳牌研究有限公司 | Steerable rotary drill bit assembly with pilot bit |
| CN201560757U (en) * | 2009-12-21 | 2010-08-25 | 北京中联博韬科技咨询有限公司 | Mud pulse generator |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10233695B2 (en) | 2017-01-20 | 2019-03-19 | China University Of Petroleum (East China) | Weight-on-bit self-adjusting drill bit |
| CN106703701A (en) * | 2017-01-20 | 2017-05-24 | 中国石油大学(华东) | Pulse impact producing mechanism and center differential pressure drill comprising same |
| WO2018036567A1 (en) * | 2017-01-20 | 2018-03-01 | 中国石油大学(华东) | Self-adaptive differential pressure-type drill bit |
| RU2678282C1 (en) * | 2017-01-20 | 2019-01-24 | Чайна Юниверсити Оф Петролиум (Ист Чайна) | Drilling bit with bit load self-regulation |
| CN107386961A (en) * | 2017-08-04 | 2017-11-24 | 四川深远石油钻井工具股份有限公司 | A kind of drilling speed device |
| CN107386961B (en) * | 2017-08-04 | 2023-08-11 | 四川深远石油钻井工具股份有限公司 | Drilling speed increasing device |
| CN107386960A (en) * | 2017-08-04 | 2017-11-24 | 四川深远石油钻井工具股份有限公司 | A kind of drilling speed device with composite drill bit |
| CN108278078A (en) * | 2018-02-05 | 2018-07-13 | 中国石油大学(北京) | Ultrasonic wave high-frequency percussion drilling rig |
| CN108278078B (en) * | 2018-02-05 | 2020-01-24 | 中国石油大学(北京) | Ultrasonic high-frequency impact drilling device |
| CN112020594A (en) * | 2018-03-26 | 2020-12-01 | 诺瓦泰克Ip有限责任公司 | Wellbore cross-section manipulation |
| CN109594927A (en) * | 2018-12-21 | 2019-04-09 | 巴州大朴石油技术服务有限公司 | A kind of elastic drill bit for oil exploitation |
| CN111608589A (en) * | 2020-05-19 | 2020-09-01 | 中国石油化工股份有限公司石油工程技术研究院 | Bottom hole stress induction unloading drill bit and method for improving drilling speed thereof |
| CN114753769A (en) * | 2022-04-15 | 2022-07-15 | 中国石油化工股份有限公司 | Drill bit based on central multi-edge-tooth modulated pulse jet and drilling method thereof |
| CN115324485A (en) * | 2022-10-17 | 2022-11-11 | 成都迪普金刚石钻头有限责任公司 | Self-adaptive PDC composite drill bit |
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| CN105317377B (en) | 2017-08-04 |
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