CN103628819B - A kind of nearly drill bit reverse impactor - Google Patents

A kind of nearly drill bit reverse impactor Download PDF

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Publication number
CN103628819B
CN103628819B CN201310586179.9A CN201310586179A CN103628819B CN 103628819 B CN103628819 B CN 103628819B CN 201310586179 A CN201310586179 A CN 201310586179A CN 103628819 B CN103628819 B CN 103628819B
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CN
China
Prior art keywords
short circuit
impactor
reverse impactor
drill bit
reverse
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Expired - Fee Related
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CN201310586179.9A
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Chinese (zh)
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CN103628819A (en
Inventor
陈世春
李玮
丛长江
王树超
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CNPC Bohai Drilling Engineering Co Ltd
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CNPC Bohai Drilling Engineering Co Ltd
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Publication of CN103628819A publication Critical patent/CN103628819A/en
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Expired - Fee Related legal-status Critical Current
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Abstract

The open a kind of nearly drill bit reverse impactor of the present invention, comprises, drill collar short circuit, current divider, reverse impactor and impact transmission short circuit; The bottom of drill collar short circuit is connected with impact transmission short circuit, is provided with current divider and reverse impactor between drill collar short circuit and impact transmission short circuit; Current divider lower port communicates with reverse impactor entrance; Reverse impactor outlet communicates with transmission short circuit.Beneficial effect is: owing to producing the torsional pulse of periodically stable frequency low-amplitude, therefore, impulsive torque can eliminate PDC drill bit stick-slip and intermittent bit freezing phenomenon, and the present invention does not have electronic unit, full hydraulic machine structure, size is less, and its impact process can not produce interference to brill Electrical Measuring Instrument.This instrument ensure that the stable and balance of drill string internal torque in drilling process, reduces drill string and reverses concussion, is conducive to MWD, LWD etc. with the steady operation boring Electrical Measuring Instrument.Easily worn part of the present invention is few, working stability, long service life, is conducive to reducing drilling cost.

Description

A kind of nearly drill bit reverse impactor
Technical field
The present invention relates to the auxiliary rock instrument of a kind of oil, the use of gas drilling technology field, particularly relate to a kind of nearly drill bit reverse impactor.
Background technology
Greatly, rock-drillability index value is high, and rate of penetration is slow, drilling cost is high for deep or ultra-deep portion formation rock hardness.PDC drill bit, when creeping into these stratum, can produce stick-slip effect, intermittent bit freezing phenomenon.The generation of this phenomenon is that when after catalase under PDC drill teeth, drill string intort impact energy discharges fast because PDC drill bit tooth when broken rock gathers a certain amount of amount of torsional energy.This phenomenon makes drill string produce and reverses concussion, makes the rock break-off process of PDC drill bit become extremely unstable, causes PDC drill bit to destroy, and reduces bit life.
In order to solve the problems such as the stick-slip effect of PDC drill bit, intermittent bit freezing, increase the stability of PDC bit operation, extend the application life of drill bit, patent US6742609B2 devises the reverse impactor that a kind of mud turbine drives, patent 200910058083.9 devises the torsional impact drilling tool that a kind of drilling fluid helicoid hydraulic motor drives, but these two kinds of drilling tool complex structures, easily worn part are many and pressure consumption is comparatively large, and application life is also restricted.
Summary of the invention
Technical problem solved by the invention is, provide a kind of PDC drill bit in firmly break rock to hard formation or abrasive layer time drill bit can not produce the nearly drill bit reverse impactor of stick-slip effect and intermittent bit freezing.
The technical solution adopted in the present invention is: a kind of nearly drill bit reverse impactor, comprises, drill collar short circuit, current divider, reverse impactor and impact transmission short circuit; The bottom of described drill collar short circuit is connected with impact transmission short circuit, is provided with current divider and reverse impactor between drill collar short circuit and impact transmission short circuit; Described current divider lower port communicates with reverse impactor entrance; Reverse impactor outlet communicates with transmission short circuit.
Described reverse impactor comprises, upper press cover, impactor shell, joint ring, fluid power impulse chamber, throttle nozzle and pressure release support ring; Described upper press cover is arranged on above impactor shell, and joint ring closes upper press cover and impactor shell, its inner formation fluid power impulse chamber; Fluid power impulse chamber is provided with fluid operated hammer, commutator, center air deflector and throttle nozzle; Described commutator is between center air deflector and fluid operated hammer, and described throttle nozzle is arranged on air deflector exit, center; The inwall of described impactor shell is formed with axial symmetry punching groove, half slot and pressure hole; Described fluid operated hammer external surface is formed with axisymmetric hammer anvil, and inner surface has axisymmetric reversing key, has hammer anvil hole and commutation keyhole at hammer anvil and reversing key both sides; The hammer anvil of described fluid operated hammer external surface is positioned at the punching groove of impactor shell, and the reversing key of fluid operated hammer inner surface extend in the reversing groove of commutator; Commutator external surface has axial symmetry scallop and reversing groove, and scallop has axial symmetry transitional pore, and relief hole is arranged at commutator bottom; Center air deflector is made up of threaded hole and base, and its base is connected on pressure release support ring, and pressure release support ring is connected to and impacts transmission short circuit top.
Described pressure hole, reversing groove, commutation keyhole and half slot communicate successively and form pressure release runner; Described half slot exports with reverse impactor and communicates; Described threaded hole, hammer anvil hole, punching groove communicate successively to form and impact runner; Punching groove communicates with relief hole through hammer anvil hole, and relief hole exports with reverse impactor and communicates.
Between described reverse impactor, transmission short circuit, location snap ring is set.
Described shell short circuit upper end pin thread is connected with top drill collar box end by API standard thread.
Described transmission short circuit lower end is connected with drill bit pin end by API standard thread.
The invention has the beneficial effects as follows: due to the torsional pulse of periodically stable frequency low-amplitude can be produced, therefore, this impulsive torque can eliminate the stick-slip phenomenon of PDC drill bit and intermittent bit freezing phenomenon, and the present invention does not have electronic unit, complete hydraulic machine structure, size is less, and its impact process can not produce interference to brill Electrical Measuring Instrument.Due to the use of this instrument, ensure that the stable and balance of drill string internal torque in drilling process, reduce drill string and reverse concussion, be conducive to MWD, LWD etc. with the steady operation boring Electrical Measuring Instrument.Easily worn part of the present invention is few, working stability, long service life, is conducive to reducing drilling cost.
Accompanying drawing explanation
Fig. 1 is the structural representation of the nearly drill bit reverse impactor of the present invention;
Fig. 2 is the A-A sectional view in Fig. 1;
Fig. 3 is the B-B sectional view in Fig. 1;
Fig. 4 is the C-C sectional view in Fig. 1;
Fig. 5 is the D-D sectional view in Fig. 1.
1. drill collar pipe nipple 2. current divider 3. screw thread platen 4. upper cover body
5. impactor shell 6. fluid operated hammer 7. commutator 8. throttle nozzle
9 pressure release support rings 10. impact transmission short circuit 11. snap ring 12. center air deflector
13. joint ring 14. tap hole 15. high-pressure and overflowing passages
16. current by pass 17. threaded hole 18. commutate keyhole 19. reversing key
20. half slot 21. reversing groove 22. pressure hole 23. scallop
24. transitional pore 25. hammer anvil 26. hammer anvil hole 27. punching grooves
28. relief hole 29. moment of torsion teeth.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described further:
As shown in Figure 1, the nearly drill bit reverse impactor of the present invention, comprise, drill collar short circuit 1, current divider 2, reverse impactor, impact transmission short circuit 10, drill collar short circuit 1 upper end pin thread is connected with top drill collar box end by API standard thread, the lower end of drill collar short circuit 1 and snap ring 11, impacts transmission short circuit 10 gap and is connected, and installs current divider 2, reverse impactor between drill collar short circuit 1 and impact transmission short circuit 10, outside, current divider 2, reverse impactor are interior for drill collar short circuit 1.
The wherein multi-cavity structure that is jointly made up of screw thread platen 3, upper cover body 4, impactor shell 5, fluid operated hammer 6, commutator 7, throttle nozzle 8, pressure release support ring 9 and joint ring 13 of reverse impactor.
As shown in Figures 2 and 3, current divider is a V-arrangement funnel-shaped part, and current divider lower port communicates with the entrance of reverse impactor, and connected mode, for being threaded, is distributed with 6 tap holes 14 in current divider upper end; Drilling fluid fluid is divided into inside and outside two strands by current divider, the direction of flow high pressure runner 15 of outside, and flow in the reversing groove 21 in commutator 7 by pressure hole 22, commutation keyhole 19, uninterrupted to commutator feed flow, internal flow is to center air deflector 12 feed flow.
The impactor shell 5 of reverse impactor communicates with impact transmission short circuit 10.Impact transmission short circuit 10 lower end to be connected with drill bit pin end by API standard thread.Between reverse impactor, impact transmission short circuit 10, location snap ring 11 is set, for fixed shunt, reverse impactor and the position of impact transmission short circuit 10 in drill collar short circuit 1.
As shown in Figure 3 and Figure 4, the upper cover body 4 of reverse impactor is on impactor shell 5, the two is inner formation fluid power impulse chamber after connecting, fluid power impulse chamber is provided with fluid operated hammer 6, commutator 7, center air deflector 12, throttle nozzle 8, between commutator 7 Tao center air deflector 12 and fluid operated hammer 6, throttle nozzle 8 is arranged on center air deflector 12 exit, fluid operated hammer 6 and impactor shell 5 gap are installed, at joint ring 13, do cyclic movement between commutator 7 and impactor shell 5, commutator 7 does cyclic movement between joint ring 13, center air deflector 12; The upper and lower axle of fluid operated hammer 6 is arranged on impactor shell 5.Impactor shell 5 inwall has axial symmetry punching groove 27, half slot 20 and pressure hole 22; Fluid operated hammer 6 external surface has axisymmetric hammer anvil 25, and inner surface has axisymmetric reversing key 19, has hammer anvil hole 26 and commutation keyhole 18 at hammer anvil 25 and reversing key 19 both sides; The hammer anvil 25 of described fluid operated hammer 6 external surface is positioned at the punching groove 27 of impactor shell 5, and the reversing key 19 of fluid operated hammer 6 inner surface extend in the reversing groove 21 of commutator 7; Commutator 7 external surface has axial symmetry scallop 23 and reversing groove 21, and scallop 23 has axial symmetry transitional pore 24, and relief hole 28 is arranged at commutator 7 bottom; Center air deflector 12 is made up of threaded hole 17 and base, and its base is connected on pressure release support ring 9, and pressure release support ring 9 is arranged on and impacts on transmission short circuit 10, is threaded; Pressure release passage is communicated successively formed by pressure hole 22, reversing groove 21, commutation keyhole 18, half slot 20, and half slot 20 exports with the pressure release support ring 9 of impactor lower end and communicates; Impact runner to be communicated successively by the threaded hole 17 of center air deflector 12, hammer anvil hole 26, punching groove 27 and current by pass 16 and form, punching groove 27 communicates with current by pass 16 through hammer anvil hole 26, and current by pass 16 exports with the pressure release support ring 9 of impactor lower end and communicates.
As shown in Figure 5, the torsion tooth 29 impacted on transmission short circuit 10 engages with the torsion tooth on drill collar short circuit 1, transmission top moment of torsion, and all fluids in Figure 5 central hole converge and flow to drill bit.
During reverse impactor work of the present invention, the drill collar of rotation drives drill collar short circuit 1 to rotate, and the moment of torsion cingulum of drill collar short circuit 1 moves the moment of torsion tooth 29 impacting transmission short circuit 10, impacts transmission short circuit 10 and is connected with drill bit and drives bit; Fluid enters into current divider 2 from the inlet opening of drill collar short circuit 1, and shunts in air deflector 2, and core flow enters center current divider 12 by impactor shell 5, and all the other flow to the space of current divider 2 and drill collar short circuit 1 formation from the tap hole 14 of current divider 2; By center air deflector to impactor exit portion, internal flow can be divided into two parts: a part of fluid by the throttle nozzle 8 of center air deflector 12 out, directly arrive impactor outlet; The transitional pore 24 that the threaded hole 17 of another part fluid in center air deflector 12 flows through the scallop 23 of commutator 7 enters hammer anvil hole 26, finally enter into punching groove 27, and finally enter into relief hole 28 from punching groove 27 by hammer anvil hole 26, this part fluid and front two parts fluid export at impactor and converge, all fluids enter into and impact transmission short circuit 10, then enter annular space space through bit nozzle; Under the acting in conjunction impacting fluid and commutation runner fluid in runner, fluid operated hammer 6, commutator 7 and impactor shell cooperative achievement hammer anvil 25 repeatedly moves in punching groove 27, produces torsional pulse, and passes to drill bit by impacting transmission short circuit 10.
It is worthy of note, protection scope of the present invention is not limited to above-mentioned instantiation mode, as long as those of ordinary skill in the art are without the need to through creative work, the embodiment that can associate all belongs to protection scope of the present invention.

Claims (6)

1. a nearly drill bit reverse impactor, is characterized in that: comprise, drill collar short circuit (1), current divider (2), reverse impactor and impact transmission short circuit (10); The bottom of described drill collar short circuit (1) is connected with impact transmission short circuit (10), is provided with current divider (2) and reverse impactor between drill collar short circuit (1) and impact transmission short circuit (10); Described current divider (2) is V-arrangement funnel-shaped part, and current divider lower port communicates with reverse impactor entrance, and connected mode, for being threaded, is distributed with 6 tap holes in current divider upper end; Drilling fluid fluid is divided into inside and outside two strands by current divider, the direction of flow high pressure runner of outside, and uninterrupted to commutator feed flow, internal flow is to center air deflector feed flow; Reverse impactor outlet communicates with transmission short circuit (10).
2. nearly drill bit reverse impactor according to claim 1, is characterized in that: described reverse impactor comprises, upper press cover (4), impactor shell (5), joint ring (13), fluid power impulse chamber, throttle nozzle (8) and pressure release support ring (9); Described upper press cover (4) is arranged on above impactor shell (5), and joint ring (13) closes upper press cover (4) and impactor shell (5), its inner formation fluid power impulse chamber; Fluid power impulse chamber is provided with fluid operated hammer (6), commutator (7), center air deflector (12) and throttle nozzle (8); Described commutator (7) is positioned between center air deflector (12) and fluid operated hammer (6), and described throttle nozzle (8) is arranged on center air deflector (12) exit; The inwall of described impactor shell (5) is formed with axial symmetry punching groove (27), half slot (20) and pressure hole (22); Described fluid operated hammer (6) external surface is formed with axisymmetric hammer anvil (25), and inner surface has axisymmetric reversing key (19), has hammer anvil hole (26) and commutation keyhole (18) at hammer anvil (25) and reversing key (19) both sides; The hammer anvil (25) of described fluid operated hammer (6) external surface is positioned at the punching groove (27) of impactor shell (5), and the reversing key (19) of fluid operated hammer (6) inner surface extend in the reversing groove (21) of commutator (7); Commutator (7) external surface has axial symmetry scallop (23) and reversing groove (21), and scallop (23) has axial symmetry transitional pore (24), and relief hole (28) is arranged at commutator (7) bottom; Center air deflector (12) is made up of threaded hole (17) and base, and its base is connected on pressure release support ring (9), and pressure release support ring (9) is connected to and impacts transmission short circuit (10) top.
3. nearly drill bit reverse impactor according to claim 2, is characterized in that: described pressure hole (22), reversing groove (21), commutation keyhole (18) and half slot (20) communicate successively and form pressure release runner; Described half slot (20) exports with reverse impactor and communicates; Described threaded hole (17), hammer anvil hole (26), punching groove (27) communicate successively to form and impact runner; Punching groove (27) communicates with relief hole (28) through hammer anvil hole (26), and relief hole (28) exports with reverse impactor and communicates.
4. nearly drill bit reverse impactor according to claim 1, is characterized in that: arrange location snap ring (11) between described reverse impactor, transmission short circuit (10).
5. nearly drill bit reverse impactor according to claim 1, is characterized in that: described drill collar short circuit (1) upper end pin thread is connected with top drill collar box end by API standard thread.
6. nearly drill bit reverse impactor according to claim 1, is characterized in that: described transmission short circuit (10) lower end is connected with drill bit pin end by API standard thread.
CN201310586179.9A 2013-11-20 2013-11-20 A kind of nearly drill bit reverse impactor Expired - Fee Related CN103628819B (en)

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Application Number Priority Date Filing Date Title
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CN103628819B true CN103628819B (en) 2016-04-20

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Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105201402B (en) * 2014-06-30 2019-01-01 中国石油化工股份有限公司 Torsional pulse drilling rig
CN105735892B (en) * 2016-02-23 2018-02-23 山东国岳金刚石制品有限公司 Shock absorbing type high frequency torsion impact device
CN105804658B (en) * 2016-04-27 2018-03-13 山东国岳金刚石制品有限公司 Impact grinding formula PDC drill bit
CN105909177B (en) * 2016-05-26 2017-11-17 长江大学 Shake and turn round composite impact speed-raising drill bit
CN108222873B (en) * 2016-12-22 2020-10-09 中国石油天然气股份有限公司 Composite vibration impactor
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
CN109025827B (en) * 2018-09-11 2020-04-14 中国石油集团长城钻探工程有限公司 Hydraulic torsional pulse impactor for drilling speed increase
CN110735597B (en) * 2019-11-03 2021-02-19 东北石油大学 Hydraulic drive drill bit impactor

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CN102191915A (en) * 2011-06-02 2011-09-21 中国石油天然气集团公司 Resonant pulse vibrating drilling device
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CN203594365U (en) * 2013-11-20 2014-05-14 中国石油集团渤海钻探工程有限公司 Near-bit torsional impactor

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US4243112A (en) * 1979-02-22 1981-01-06 Sartor Ernest R Vibrator-assisted well and mineral exploratory drilling, and drilling apparatus
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CN102191915A (en) * 2011-06-02 2011-09-21 中国石油天然气集团公司 Resonant pulse vibrating drilling device
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CN203594365U (en) * 2013-11-20 2014-05-14 中国石油集团渤海钻探工程有限公司 Near-bit torsional impactor

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