CN105649561B - A kind of coiled tubing tractor - Google Patents

A kind of coiled tubing tractor Download PDF

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Publication number
CN105649561B
CN105649561B CN201610135288.2A CN201610135288A CN105649561B CN 105649561 B CN105649561 B CN 105649561B CN 201610135288 A CN201610135288 A CN 201610135288A CN 105649561 B CN105649561 B CN 105649561B
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CN
China
Prior art keywords
central siphon
shell
rotation central
coiled tubing
bullet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201610135288.2A
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Chinese (zh)
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CN105649561A (en
Inventor
夏成宇
吕加华
王杰
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Yangtze University
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Yangtze University
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Publication date
Application filed by Yangtze University filed Critical Yangtze University
Priority to CN201610135288.2A priority Critical patent/CN105649561B/en
Publication of CN105649561A publication Critical patent/CN105649561A/en
Application granted granted Critical
Publication of CN105649561B publication Critical patent/CN105649561B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B23/00Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells
    • E21B23/08Introducing or running tools by fluid pressure, e.g. through-the-flow-line tool systems

Abstract

The present invention relates to a kind of coiled tubing tractor, belong to oil gas field downhole tool technical field.The tractor includes rotation central siphon, shell, screw rod shell, screw drive axle, bullet and voussoir, it is characterised in that:The rotary shaft pipe end head thread being set with rotation central siphon in shell, shell is provided with screw drive axle;It is equipped with screw drive axle on screw rod shell, the rotation central siphon of screw rod shell side and motor joint is housed, connected with outer casing is housed on the rotation central siphon of motor joint side.The retractor structures are simple, novel in design, using drilling mud as power in the course of work, drive rotation central siphon to rotate by screw rod, then drive coiled tubing to creep forward by the relative motion between bullet and rotary shaft;So as to realize the traction work of coiled tubing, it is larger to solve existing tractor underground frictional resistance, tripping in and takes out the problem of difficult, the pressure of the drill is difficult to apply;Traction coiled tubing in the operations such as well workover and completion is particularly suitable for use in use.

Description

A kind of coiled tubing tractor
Technical field
The present invention relates to a kind of coiled tubing tractor, belong to oil gas field downhole tool technical field.
Background technology
Crude oil price drops in the middle and later periods eighties, world wide, forces domestic and international operation company and service company to be studied The new method of drilling cost can be reduced with use, along with the raising of coiled tubing q&r, coiled tubing is in well workover Sharply increased with the application in the operation such as completion, and achieve obvious economic benefit and social benefit.
Downhole tractor is underground crawl device, is also underground climbing mechanism, underground tractor, downhole tractor device people, well Lower hydraulic thruster, downhole drill bit propeller etc., be it is a kind of can shaft bottom provide tractive force downhole tool.Downhole tractor is pressed Its motion principle can be divided into roller creeping-type, crawler belt creeping-type(Track-mounted)With grab arm rest telescopic slide formula(Step-by-step movement)3 kinds, Wherein wheeled to occur earliest, telescopic to take second place, crawler type is the latest.Traction crawl device can be divided into CT formulas, cable by its energy source Formula and hybrid 3 kinds.For the country, foreign countries all take strict technical know-how measure, cause the country to downhole tractor Research also in ground zero stage.Current domestic existing tractor has poor structural reliability mostly due to design reasons, Underground frictional resistance is larger, tripping in and takes out difficult, the pressure of the drill and the defect such as is difficult to apply, therefore, it is necessary to research and develop it is a kind of simple in construction, can Effective solution underground frictional resistance is larger, tripping in and the tractor that taking-up is difficult, the pressure of the drill is difficult to the technical barriers such as application.
The content of the invention
It is an object of the invention to:There is provided a kind of simple in construction, it is larger effectively to solve underground frictional resistance, tripping in and take out tired Difficult, the pressure of the drill is difficult to apply the coiled tubing tractor of problem.
The technical scheme is that:
A kind of coiled tubing tractor, including rotation central siphon, shell, screw rod shell, screw drive axle, bullet and wedge Block, it is characterised in that:Shell is set with rotation central siphon, shell one end is provided with end cap, the rotation of end cap side by screw Stop nut A is provided with central siphon,
Rotary shaft pipe end head thread in shell is provided with screw drive axle;Screw rod shell, spiral shell are housed on screw drive axle It is equipped with motor joint, the rotation central siphon of motor joint side and is provided with by thrust bearing on the rotation central siphon of bar shell side Connected with outer casing, fixation is bolted between connected with outer casing and motor joint;Stop nut B is provided with connected with outer casing, is limited Position nut B contacts connection with shell;Bullet is movably installed with rotation central siphon on the inside of end cap, shell corresponding with bullet It is evenly equipped with circumference in multiple fixing holes, fixing hole and voussoir is installed, voussoir is slidably connected with bullet.
Shape corresponding with rotary pin shaft on rotary pin shaft, bullet is installed on described rotation central siphon and is provided with cam rail Groove, bullet is slidably connected by the cooperation of rotary pin shaft and cam rail groove with rotation central siphon.
Turning set is installed on described rotary pin shaft.
Wedge groove is axially evenly equipped with described bullet, voussoir is slidably connected by wedge groove with bullet.
Spacing shoulder is provided with the rotation central siphon of described thrust bearing side;The rotation central siphon of thrust bearing opposite side On be provided with discharge orifice.
Described screw rod shell is connected with motor joint screw thread.
Described connected with outer casing is connected with shell key.
The beneficial effects of the present invention are:
The coiled tubing retractor structures are simple, novel in design, using drilling mud as power in the course of work, pass through screw rod Rotation central siphon rotation is driven, then drives coiled tubing to creep forward by the relative motion between bullet and rotary shaft;So as to The traction work of coiled tubing is realized, it is larger to efficiently solve existing tractor underground frictional resistance, tripping in and to take out difficult, the pressure of the drill difficult The problem of applying;Traction coiled tubing in the operations such as well workover and completion is particularly suitable for use in use.
Brief description of the drawings
Fig. 1 is structural representation of the invention;
Fig. 2 is mplifying structure schematic diagram at Fig. 1 A;
Fig. 3 is the expanded schematic diagram of the cam rail groove of the present invention;
Motion schematic diagrames of the Fig. 4 for rotary pin shaft of the invention in cam rail groove;
Fig. 5 is the rotary pin shaft of the present invention and the axial connection diagram of cam rail groove;
Fig. 6 is the structural representation of the bullet of the present invention;
Fig. 7 is the cross section structure schematic diagram of the bullet of the present invention.
In figure:1st, central siphon is rotated, 2, shell, 3, screw rod shell, 4, screw drive axle, 5, bullet, 6, voussoir, 7, end Lid, 8, stop nut A, 9, motor joint, 10, thrust bearing, 11, connected with outer casing, 12, bolt, 14, spacing shoulder, 15, let out Discharge orifice, 16, rotary pin shaft, 17, cam rail groove, 18, wedge groove, 19, turning set.
Embodiment
The coiled tubing tractor includes rotation central siphon 1, shell 2, screw rod shell 3, screw drive axle 4, bullet 5 and wedge Block 6.Shell 2 is set with rotation central siphon 1, the one end of shell 2 is provided with end cap 7, the rotation central siphon 1 of the side of end cap 7 by screw On be provided with stop nut A8.
The ends screw of rotation central siphon 1 in shell 2 is provided with screw drive axle 4;Screw rod shell is housed on screw drive axle 4 3, motor joint 9 is housed, screw rod shell 3 is threadedly coupled with motor joint 9 on the rotation central siphon 1 of the side of screw rod shell 3.
Connected with outer casing 11 is provided with by thrust bearing 10 on the rotation central siphon 1 of the side of motor joint 9, connected with outer casing 11 with It is connected, is connected between connected with outer casing 11 and shell 2 for key by bolt 12 between motor joint 9;Set on connected with outer casing 11 Stop nut B is equipped with, stop nut B contacts connection with shell 2;Limited location is set on the rotation central siphon 1 of the side of thrust bearing 10 Shoulder 14;Discharge orifice 15 is provided with the rotation central siphon 1 of the opposite side of thrust bearing 10.
Rotary pin shaft 16 is installed on the rotation central siphon 1 of the inner side of end cap 3;Rotate on central siphon 1 by the activity of rotary pin shaft 16 It is provided with bullet 5, bullet 5 and the corresponding shape of rotary pin shaft 16 is provided with cam rail groove 17, bullet 5 passes through rotating dog The cooperation of axle 16 and cam rail groove 17 is slidably connected with rotation central siphon 1.It is evenly equipped with the circumference of shell 2 corresponding with bullet 5 It is provided with multiple fixing holes, fixing hole on voussoir 6, bullet 5 and is axially evenly equipped with wedge groove 18, voussoir 6 passes through wedge groove 18 It is slidably connected with bullet 5.
Turning set 19 is installed on the coiled tubing tractor rotary pin shaft 16;To increase rotary pin shaft 16 and cam rail Slide coefficient between groove 17.
Using drilling mud as power during coiled tubing tractor work, rotation central siphon 1 is driven to revolve by screw drive axle 4 Turn, by the coiled tubing quality connected behind screw rod shell 3 is big so that the only band of rotary pin shaft 16 on rotation central siphon 1 Mantle body 5 rotates, when bullet 5 is moved to the left on rotating shaft pipe 1, progressively promotes voussoir 6 to extend radially out by wedge groove 18, So as to compress the borehole wall.Rotate central siphon 1 to continue to rotate, because voussoir 6 compresses the borehole wall, bullet 5 is immovable by active force, rotation Rotating shaft pipe 1 and the formation relative motion of bullet 5, so that rotation central siphon 1 is moved forward, thus act on lower band in connected with outer casing 11 Dynamic coiled tubing moves right, and realizes coiled tubing distraction procedure to the right.After coiled tubing reaches traction maximum distance, cam Reversely, bullet 5 moves right on rotating shaft pipe 1 for the relative motion of rail groove 17 and rotary pin shaft 16, voussoir 6 now with The movement of bullet 5 progressively radially bounces back, and voussoir 6 departs from the borehole wall, returns original state.
The coiled tubing tractor is by voussoir 6, and continuous oil is realized in the relative motion between bullet 5 and rotation central siphon 1 The traction work of pipe, to ensure that rotation central siphon 1 does not pull screw drive axle 4 at work, using devising motor joint 9 and spiral shell Bar shell 3 is threadedly coupled, and motor joint 9 is connected with connected with outer casing 11 by bolt 12, and shoulder 14 is set on rotation central siphon 1 and is pacified Dress thrust bearing 10 bears the mode of axial force;So that axial force transmission is to connected with outer casing 11, then is delivered to screw rod shell, make Screw drive axle 4 is not by excessive axial force.
The similar oval annular groove of cam rail groove 17 on the coiled tubing tractor bullet 5(Referring to Fig. 2), it is in cone Body 5 has certain angle of inclination, during work, and the leading portion of cam rail groove 17 can make bullet 5 relative on rotation central siphon 1 Move right, the second half section part of cam rail groove 17 can make bullet 5 relative to left movement on rotation central siphon 1.Bullet 5 The radial motion of voussoir 6 can be promoted in motion process.And connected between shell 2 and connected with outer casing 11 by spline, shell 2 can It is axially moveable, but is limited by stop nut.
The coiled tubing retractor structures are simple and reliable, and it is larger to solve existing tractor underground frictional resistance, tripping in and taking-up The problem of difficult, the pressure of the drill is difficult to apply;The coiled tubing tractor is due to for Purely mechanical, without cable and control unit Point so that instrument not easy break-down, reliability is greatly improved, and coiled tubing can be enable to extend longer in underground.

Claims (7)

1. a kind of coiled tubing tractor, including rotation central siphon(1), shell(2), screw rod shell(3), screw drive axle(4), cone Body(5)And voussoir(6), it is characterised in that:Rotate central siphon(1)On be set with shell(2), shell(2)Pacified by screw one end Equipped with end cap(7), end cap(7)The rotation central siphon of side(1)On be provided with stop nut A(8), shell(2)Interior rotation central siphon (1)Ends screw is provided with screw drive axle(4);Screw drive axle(4)It is upper that screw rod shell is housed(3), screw rod shell(3)Side Rotation central siphon(1)It is upper that motor joint is housed(9), motor joint(9)The rotation central siphon of side(1)It is upper to pass through thrust bearing(10) Connected with outer casing is installed(11), connected with outer casing(11)With motor joint(9)Between pass through bolt(12)It is connected;Connected with outer casing (11)On be provided with stop nut B, stop nut B and shell(2)Contact connection;End cap(7)The rotation central siphon of inner side(1)Upper work It is dynamic that bullet is installed(5), with bullet(5)Corresponding shell(2)It is evenly equipped with multiple fixing holes, fixing hole and installs on circumference There is voussoir(6), voussoir(6)With bullet(5)It is slidably connected.
2. a kind of coiled tubing tractor according to claim 1, it is characterised in that:Described rotation central siphon(1)Upper peace Equipped with rotary pin shaft(16), bullet(5)Upper and rotary pin shaft(16)Correspondence shape is provided with cam rail groove(17), bullet (5)Pass through rotary pin shaft(16)With cam rail groove(17)Cooperation with rotation central siphon(1)It is slidably connected.
3. a kind of coiled tubing tractor according to claim 2, it is characterised in that:Described rotary pin shaft(16)Upper peace Equipped with turning set(19).
4. a kind of coiled tubing tractor according to claim 1, it is characterised in that:Described bullet(5)Upper axial direction It is evenly equipped with wedge groove(18), voussoir(6)Pass through wedge groove(18)With bullet(5)It is slidably connected.
5. a kind of coiled tubing tractor according to claim 1, it is characterised in that:Described thrust bearing(10)Side Rotation central siphon(1)On be provided with spacing shoulder(14);Thrust bearing(10)The rotation central siphon of opposite side(1)On be provided with aerial drainage Hole(15).
6. a kind of coiled tubing tractor according to claim 1, it is characterised in that:Described screw rod shell(3)With horse Up to joint(9)Threaded connection.
7. a kind of coiled tubing tractor according to claim 1, it is characterised in that:Described connected with outer casing(11)With it is outer Shell(2)Key is connected.
CN201610135288.2A 2016-03-10 2016-03-10 A kind of coiled tubing tractor Expired - Fee Related CN105649561B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610135288.2A CN105649561B (en) 2016-03-10 2016-03-10 A kind of coiled tubing tractor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610135288.2A CN105649561B (en) 2016-03-10 2016-03-10 A kind of coiled tubing tractor

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CN105649561A CN105649561A (en) 2016-06-08
CN105649561B true CN105649561B (en) 2017-10-17

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Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106703729A (en) * 2016-12-30 2017-05-24 中国人民解放军国防科学技术大学 Hydraulic control method and system of downhole tractor
CN106677732A (en) * 2016-12-30 2017-05-17 中国人民解放军国防科学技术大学 All-hydraulic petroleum downhole traction device
CN107605418B (en) * 2017-10-27 2019-06-04 中国石油集团渤海钻探工程有限公司 A kind of coiled tubing waterpower traction crawl device
CN108931345B (en) * 2018-09-10 2020-08-28 陈朝晖 Suppress leak hunting device

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5794703A (en) * 1996-07-03 1998-08-18 Ctes, L.C. Wellbore tractor and method of moving an item through a wellbore
CN102777145A (en) * 2012-08-16 2012-11-14 中国石油大学(北京) Electric control fluid drive coiled tubing downhole retractor
CN103114839A (en) * 2011-11-16 2013-05-22 长江大学 One-way transmission type retractor used under horizontal well
CN204344030U (en) * 2014-12-19 2015-05-20 中国石油大学(华东) Legged continuous-tube drilling tractor
CN105332667A (en) * 2015-11-26 2016-02-17 长江大学 Coiled tubing tractor
CN205370484U (en) * 2016-03-10 2016-07-06 长江大学 Coiled tubing tractor

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5794703A (en) * 1996-07-03 1998-08-18 Ctes, L.C. Wellbore tractor and method of moving an item through a wellbore
CN103114839A (en) * 2011-11-16 2013-05-22 长江大学 One-way transmission type retractor used under horizontal well
CN102777145A (en) * 2012-08-16 2012-11-14 中国石油大学(北京) Electric control fluid drive coiled tubing downhole retractor
CN204344030U (en) * 2014-12-19 2015-05-20 中国石油大学(华东) Legged continuous-tube drilling tractor
CN105332667A (en) * 2015-11-26 2016-02-17 长江大学 Coiled tubing tractor
CN205370484U (en) * 2016-03-10 2016-07-06 长江大学 Coiled tubing tractor

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Granted publication date: 20171017

Termination date: 20180310