CN105672884B - A kind of drilling tool and its boring method - Google Patents
A kind of drilling tool and its boring method Download PDFInfo
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- CN105672884B CN105672884B CN201410668909.4A CN201410668909A CN105672884B CN 105672884 B CN105672884 B CN 105672884B CN 201410668909 A CN201410668909 A CN 201410668909A CN 105672884 B CN105672884 B CN 105672884B
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Abstract
The invention discloses a kind of drilling tool and its boring methods.The drilling tool includes spline outer barrel, spline mandrel, anti-lost cylinder and impulse generator, drill bit；Spline outer barrel is machined with the by-pass duct through spline outer barrel barrel；Spline mandrel lower part is connect with impulse generator；Impulse generator lower end is connect with drill bit；Spline mandrel is connect with spline outer barrel by spline, and can realize that torque is transmitted and slided up and down；Spline mandrel drives bypass to be sealed in spline outer barrel and moves up and down, to control the switch of by-pass port.The drilling tool is simple in structure, and the connection of annular space may be implemented inside and outside drill string and be isolated；Small displacement drilling well, high flow rate washover may be implemented；Pulse cavitating jet impact force can be made full use of, and bit pressure is improved using hydraulic pressurization function, to improve the rate of penetration of drilling well.
Description
Technical field
The present invention relates to a kind of drilling tool field more particularly to a kind of drilling tools and its boring method.
Background technology
Drilling engineering is that engineering big, that risk is high is invested in Reservoir Development, its expense accounts for cost of exploration ＆ development
50% or more.Breaking technique for rock is the core content of Oil ＆ Gas Drilling Technology, the quality of efficiency of breaking rock directly decide bit speed with
Cost further determines the economic benefit of drilling engineering.With deepening continuously for China's oil-gas exploration and development, deep-well, ultradeep well bore
Well quantity is continuously increased.When well depth increases, low, of high cost, period length the problem of bit speed is very prominent, seriously affects
The exploration and development speed of entire oil gas field.Especially deep formation rate of penetration is slow, causes drilling period long, during drilling well, respectively
Kind engineering accident happens occasionally, and construction efficiency is low.Analyzing its reason mainly has：One, depth, ground lamination are buried in well section stratum in deep
Implementation causes rock intensity itself big with greatly, non-breakable；Two, with the increase of well depth, drilling fluid is lost along journey in drill string
Constantly increase, the hydraulic energy so as to cause drill bit broken formation constantly reduces, and the available water power of drill bit drastically declines, very
, there is shaft bottom bed course in the difficult landwaste for removing shaft bottom in time, causes landwaste and repeats broken even bit balling, leads to rate of penetration
It substantially reduces；Three, for extended reach well or inclined shaft, when tubing string enters well, enter that well length is longer, need the tubing string overcome and the borehole wall
Between frictional force it is bigger, the increase of frictional resistance reduces the available weight being transmitted on drill bit, causes drill bit in shaft bottom
Mechanical rock breaking energy wretched insufficiency, bit teeth is difficult wedging rock, and broken rock mode is mainly based on grinding, rather than volume is broken
It is broken, to affect the raising of rate of penetration.
The existing method for improving rate of penetration includes mainly waterpower pulse method and cavitation jet method.Water conservancy pulse
Basic Mechanism mainly will be modulated to pulsing jet by the continuous flow of drill string, so as to improve bottom-hole flow field, improve bottom hole flushing
With clear rock efficiency, reduces pressure holding and repeat broken；And the dominant mechanism of cavitation jet is to introduce powerful cavitation destruction
Into jet stream, bottom hydraulic energy is improved, to improve the technology of deep drilling speed.But existing tool all uses
One of which speed-raising mechanism, and can not solve to drag pressure phenomenon in extended reach well.Therefore, developing one kind can be by waterpower pulse
Shaft bottom is propagated to downwards and cavitation effect is combined to improve the stress of bottom rock, to strengthen the purification of landwaste, and by water
Pressure oscillation caused by power is pulsed, which is converted into, acts on drill bit impact load, forms periodic bit pressure, drill bit is made to revolve
Also there is the drilling tool for increasing bit pressure and reducing vibrating effect while turning, be an important directions of drilling speed.
Invention content
The purpose of the present invention is exactly of the existing technology in order to overcome the problems, such as, provides a kind of brill by reducing when creeping into
Well liquid discharge capacity improves deep layer bit hydraulic horsepower and generates pulse cavitating jet, while guaranteeing high flow rate washover and fully profit
Bit pressure is improved with bit pressuredrop, plays drilling tool and boring method that jet drilling technology is acted in the speed-raising of deep layer.
To achieve the above object, the present invention uses following design scheme：
A kind of drilling tool is on the basis of impulse generator and drill bit combine drilling tool, in the upper of impulse generator
Side connects a set of lifting sub.The lifting sub includes spline outer barrel, spline mandrel and anti-lost cylinder.Wherein, spline outer barrel is in cylinder
Shape structure, top and bottom are threaded respectively, and inside is machined with internal spline, are machined between internal spline and threaded upper ends
Through the by-pass duct of spline outer barrel barrel；Anti-lost cylinder is cylindrical in shape structure, and upper end is threaded, and lower end has towards anti-lost cylinder
The step of internal protrusion；Spline mandrel external process has external splines, and lower part is threaded to be connect with impulse generator, in screw thread
Evagination step is equipped with above junction；Impulse generator lower end is connect with drill bit；Spline mandrel is connected with spline outer barrel by spline
It connects, and can realize that torque is transmitted and slided up and down；Spline mandrel moves up and down in spline outer barrel, to control opening for by-pass port
It closes.
Said program further comprises：Spline mandrel upper end outer rim is machined with sealed groove, the sealing of installation bypass and guiding
Ring；The extreme position that spline mandrel slides up and down respectively by its evagination step and spline outer barrel lower end and in anti-lost cylinder
Boss rank limits；And ensures that bypass is sealed in and be located at spline outer barrel by-pass duct when spline mandrel slides up and down extreme position
Upper and lower part.Outer barrel can be used in the spline outer barrel and lower outer barrel assembles；The drill bit is equipped with cavitating nozzle.
Boring method based on above-mentioned tool is：
The drilling tool is connected on drill string in tripping in well-drilling borehole；When bit contact shaft bottom carries out drilling operation,
Spline mandrel drives bypass to be sealed in spline outer barrel and moves up, and to close by-pass port, drilling fluid flows through drilling tool, multiple key core
Axis inner space, impulse generator and drill bit, subsequently into annular space；When drill bit lift-off shaft bottom carries out circulation well cleanup operation, spline
Mandrel drives bypass to be sealed in spline outer barrel and move down, and to opening by-pass port, drilling fluid flows through drilling tool, spline outer barrel
By-pass port, subsequently into annular space.Preferably, the drilling fluid when flow of drilling fluid is less than circulation well cleanup in drilling process
Flow.
It is an advantage of the invention that：(1) drilling tool is simple in structure, it may be convenient to realize inside and outside drill string the connection of annular space with
Isolation；(2) small displacement drilling well may be implemented, reduce cyclic pressure dissipation, the water power and pulse cavitating jet for fully improving drill bit rush
Power is hit, to improve the rate of penetration of drilling well；(3) when landwaste, which occurs, in bore hole annulus carries the problems such as bad, it may be convenient to
Drilling tool bypass passageways are opened, to realize huge discharge circulation well cleanup；(4) spline mandrel and spline housing are slidably connected, can
To make full use of bit pressuredrop, bit pressure is improved.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram that drilling tool by-pass duct is closed of the present invention.
Fig. 2 is a kind of structural schematic diagram that drilling tool by-pass duct is in the open state of the present invention.
1. top drilling tool in figure, 2. bypass sealings, 3. by-pass ports, 4. spline outer barrels, 5. spline mandrels, 6. splines, 7. is anti-
Fall cylinder, 8. impulse generators, 9. drill bits.
Specific implementation mode
Below in conjunction with the accompanying drawings 1, the invention will be further described for attached drawing 2：
In attached drawing 1 and attached drawing 2, a kind of drilling tool, including spline outer barrel 4, spline mandrel 5, anti-lost cylinder 7 and pulse hair
Raw device 8, drill bit 9.Spline outer barrel 4 is cylindrical in shape structure, and top and bottom are threaded respectively, and inside is machined with internal spline,
The by-pass duct 3 through 4 barrel of spline outer barrel is machined between internal spline and threaded upper ends；Anti-lost cylinder 7 is cylindrical in shape structure, upper end
It is threaded, lower end has the step towards 7 internal protrusion of anti-lost cylinder；5 external process of spline mandrel has external splines, lower part to add
Work has screw thread to be connect with impulse generator 8, and evagination step is equipped with above threaded connection place；8 lower end of impulse generator and drill bit 9
Connection；Spline mandrel 5 is connect with spline outer barrel 4 by spline 6, and can realize that torque is transmitted and slided up and down；5 band of spline mandrel
Dynamic bypass sealing 2 is moved up and down in spline outer barrel 4, to control the switch of by-pass port 3.The drill bit 9 is equipped with cavitating nozzle.
5 upper end outer rim of spline mandrel is machined with groove, respectively installation bypass sealing 2 and guide ring, and spline mandrel 5 is to moving up
Evagination step and spline outer barrel 4 lower end contact position of the dynamic extreme position in spline mandrel 5, the pole that spline mandrel 5 moves down
Extreme position is in the evagination step of spline mandrel 5 and the convex step contact position of anti-lost cylinder 7；Spline mandrel 5 passes through with spline outer barrel 4
Radial fluid-tight seal is realized in bypass sealing 2；When the evagination step of spline mandrel 5 is with spline 4 times end in contact of outer barrel, bypass sealing 2
Positioned at the top of the by-pass duct 3 of spline outer barrel, prevent from flowing through the fluid of tool interior by the by-pass duct of spline outer barrel into
Enter the exterior space of spline outer barrel；When the evagination step of spline mandrel 5 is contacted with the convex step of anti-lost cylinder 7, bypass sealing 2
In the lower part of the by-pass duct 3 of spline outer barrel 4, the fluid for flowing through tool interior enters flower by the by-pass duct 3 of spline outer barrel 4
The exterior space of key outer barrel 4.The spline outer barrel 4 is preferably assembled by upper spline outer barrel and lower spline outer barrel two parts,
When, which there is landwaste, in bore hole annulus carries the problems such as bad, it may be convenient to open drilling tool bypass passageways.
In drilling process, the drilling tool is connected on drill string in tripping in well-drilling borehole；Bit contact shaft bottom carries out
When drilling operation, spline mandrel 5 drives bypass sealing 2 to be moved up in spline outer barrel 4, to close by-pass port 3, drilling fluid
Drilling tool, 5 inner space of spline mandrel, impulse generator 8 and drill bit 9 are flowed through, subsequently into annular space；
Drill bit lift-off shaft bottom carry out circulation well cleanup operation when, spline mandrel 5 drive bypass sealing 2 spline outer barrel (4) to
Lower movement, to open by-pass port 3, drilling fluid flows through the by-pass port 3 of drilling tool, spline outer barrel 4, subsequently into annular space.
Flow Q2, the Q1 value of drilling fluid takes Q2 values when the flow Q1 of drilling fluid is less than circulation well cleanup in drilling process
2/3。
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
Understanding without departing from the principles and spirit of the present invention can carry out these embodiments a variety of variations, modification, replace
And modification, the scope of the present invention is by appended claims and its equivalent limits.
Claims (4)
1. a kind of drilling tool, including impulse generator (8) and drill bit (9), it is characterised in that：In the upper of impulse generator (8)
Side is connected with lifting sub；The lifting sub includes spline outer barrel (4), spline mandrel (5), anti-lost cylinder (7)；Wherein, outside spline
Cylinder (4) is cylindrical in shape structure, and top and bottom are threaded respectively, and inside is machined with internal spline, in internal spline and threaded upper ends
Between be machined with the by-pass duct (3) through spline outer barrel (4) barrel；Anti-lost cylinder (7) is cylindrical in shape structure, and upper end is machined with spiral shell
Line, lower end have the step towards anti-lost cylinder (7) internal protrusion；Spline mandrel (5) external process has external splines, lower part to be machined with
Screw thread is connect with impulse generator (8), and evagination step is equipped with above threaded connection place；Impulse generator (8) lower end and drill bit
(9) it connects；Spline mandrel (5) is axial mating by spline (6) with spline outer barrel (4), realizes torque transmission and upper downslide
It is dynamic；Spline mandrel (5) upper end outer rim is machined with sealed groove, installation bypass sealing (2)；The pole that spline mandrel (5) slides up and down
Extreme position is limited by its evagination step and spline outer barrel (4) lower end and with the convex step of anti-lost cylinder (7) respectively；Bypass sealing
(2) top of spline outer barrel (4) by-pass duct (3) is located at when spline mandrel (5) slides up and down extreme position under
Portion.
2. drilling tool according to claim 1, it is characterised in that：The spline outer barrel (4) is by upper outer barrel and lower outer
Cylinder assembles；The drill bit (9) is equipped with cavitating nozzle.
3. the boring method of drilling tool according to claim 1 or 2, it is characterised in that：The drilling tool is connected
On drill string in tripping in well-drilling borehole；When bit contact shaft bottom carries out drilling operation, spline mandrel (5) drives bypass sealing (2)
It is moved up in spline outer barrel (4), to close by-pass duct (3), it is internal empty that drilling fluid flows through drilling tool, spline mandrel (5)
Between, impulse generator (8) and drill bit (9), subsequently into annular space；When drill bit lift-off shaft bottom carries out circulation well cleanup operation, multiple key core
Axis (5) drives bypass sealing (2) to be moved down in spline outer barrel (4), and to open by-pass duct (3), drilling fluid flows through brill
The by-pass duct (3) of tool, spline outer barrel (4), subsequently into annular space.
4. the boring method of drilling tool according to claim 3, it is characterised in that：The stream of drilling fluid in drilling process
The flow of drilling fluid when amount is less than circulation well cleanup.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410668909.4A CN105672884B (en) | 2014-11-21 | 2014-11-21 | A kind of drilling tool and its boring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410668909.4A CN105672884B (en) | 2014-11-21 | 2014-11-21 | A kind of drilling tool and its boring method |
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| Publication Number | Publication Date |
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| CN105672884A CN105672884A (en) | 2016-06-15 |
| CN105672884B true CN105672884B (en) | 2018-08-28 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106246175B (en) * | 2016-09-23 | 2018-06-15 | 中国矿业大学 | A kind of pulsing jet and mechanical shock combined-breaking rock mechanism |
| CN107965274A (en) * | 2018-01-08 | 2018-04-27 | 西南石油大学 | Spline slip-type drill string coupling arrangement |
| CN109458138B (en) * | 2018-12-17 | 2024-04-26 | 辽宁工程技术大学 | Spline insertion type lockable cavitation jet drill rod drill bit structure and jet method |
| CN113027327B (en) * | 2021-04-08 | 2023-08-22 | 河南易发石油工程技术有限公司 | Drilling is with two-way shock attenuation drilling tool pressurization instrument |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4040485A (en) * | 1974-10-23 | 1977-08-09 | Vann Tool Company, Inc. | Method of simultaneously setting a packer device and actuating a vent assembly |
| US4497366A (en) * | 1982-06-03 | 1985-02-05 | Geo Vann, Inc. | Packer actuated vent assembly |
| FI66460C (en) * | 1982-10-08 | 1984-10-10 | Tampella Oy Ab | TRYCKMEDIEDRIVEN SLAGAPPARAT |
| CN103114809B (en) * | 2013-02-06 | 2015-03-11 | 中国石油大学(华东) | Vibration absorption type downhole hydraulic pulse generation device and well drilling method thereof |
| CN103925393A (en) * | 2014-04-22 | 2014-07-16 | 孙东奎 | Slide valve for mud pulse generator |
| CN204326968U (en) * | 2014-11-21 | 2015-05-13 | 中石化胜利石油工程有限公司钻井工艺研究院 | A kind of drilling tool |
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Effective date of registration: 20230608 Address after: 100728 No. 22 North Main Street, Chaoyang District, Beijing, Chaoyangmen Patentee after: SINOPEC Group Patentee after: SINOPEC OILFIELD SERVICE Corp. Patentee after: SINOPEC SHENGLI PETROLEUM ENGINEERING Co.,Ltd. Patentee after: SINOPEC SHENGLI PETROLEUM ENGINEERING CO., LTD. DRILLING TECHNOLOGY Research Institute Address before: 257017 No. 827, Beiyi Road, Dongying District, Dongying City, Shandong Province Patentee before: SINOPEC SHENGLI PETROLEUM ENGINEERING CO., LTD. DRILLING TECHNOLOGY Research Institute |
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