CN105332667A - Coiled tubing tractor - Google Patents
Coiled tubing tractor Download PDFInfo
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- CN105332667A CN105332667A CN201510838327.0A CN201510838327A CN105332667A CN 105332667 A CN105332667 A CN 105332667A CN 201510838327 A CN201510838327 A CN 201510838327A CN 105332667 A CN105332667 A CN 105332667A
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- rotary sleeve
- coiled tubing
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- rail groove
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Abstract
The invention relates to a coiled tubing tractor, belonging to the technical field of downhole tools of oil and gas fields. The tractor comprises a rotating shaft, a rotating sleeve A, a rotating sleeve B, a connection shell, a screw drive shaft, a motor joint and a thrust bearing, wherein the rotating sleeve A movably sleeves on the rotating shaft; the rotating sleeve B sleeves on the rotating sleeve A through the rotating shaft; limiting shoulders are respectively arranged on the rotating sleeve A and the rotating sleeve B; and the rotating sleeve A is connected with the rotating sleeve B in a clamping way through the matching of the limiting shoulders. When the tractor works, drilling fluid is taken as power for driving the screw drive shaft to rotate, so that the power is convenient to obtain, and the reliability is greatly improved. The coiled tubing tractor effectively solves the technical problems that the coiled tubing is difficult to enter a well and difficult to be taken out of the well because of relatively large downhole friction resistance and drill pressure is difficult to be applied, so that the coiled tubing can extend to be longer in the well.
Description
Technical field
The present invention relates to a kind of coiled tubing tractor, belong to oil gas field downhole tool technical field.
Background technology
Before the thirties in 20th century, people have just had preliminary understanding to the concept of continuous well drilling pipe column and advantage.During the Second World War, allied forces once carried the energy with coiled tubing from seabed, to meet the needs of war.It is reported, California oil companies in 1962 and Bo Wen tools factory have developed first archetype " the light-duty reparing device for vehicle of continuous-tube ", are used for removing the sand bridge in coastal Oil/gas Well.1964, RoyH.CullaResearch company have developed a kind of well system, the system uses a continuous print, flexibly well drilling pipe column (external diameter φ 66.68mm) and carry out circulating fluid, and use electric current to drive downhole electric motor, use a hydraulic pressure injection head put into or reclaim well drilling pipe column.The stone factory granitic formation of this system once near the MarbleFalls of Texas has bored the test well of a bite φ 120.65mm, well depth 304.8m, bit speed is 1.53 ~ 3.05m/h.
In more than 20 year after this, although coiled tubing technology achieves some progress, and in well workover and completion practice, obtain some application, also carried out drilling well and attempt, and due to evaluation for coiled tubing reliability problem, failed to obtain at oil circle to apply on a large scale.The middle and later periods eighties, crude oil price drop in world wide, force domestic and international operation company and service company's research and adopt the new method that can reduce drilling cost, add the raising of coiled tubing q&r, the application of coiled tubing in the operation such as well workover and completion sharply increases, and achieves obvious economic benefit and social benefit.Coiled tubing operationally needs to use downhole tractor, downhole tractor and down-hole crawl device, also being down-hole climbing mechanism, underground tractor, downhole tractor device people, downhole hydraulic pressurizer, downhole drill bit propeller etc., is a kind of downhole tool that can provide tractive force in shaft bottom.Downhole tractor can be divided into roller creeping-type, crawler belt creeping-type (track-mounted) by its motion principle and grab arm rest telescopic slide formula (step-by-step movement) 3 kinds, and wherein wheeled appearance the earliest, telescopicly takes second place, and crawler type the latest.Traction crawl device can be divided into CT formula, cable type and hybrid 3 kinds by its energy source.For domestic, all take strict technical know-how measure abroad, cause the domestic research to downhole tractor to be also in the stage of ground zero.
Summary of the invention
The object of the invention is to: provide a kind of structure simple, easy to use, be power with drilling mud, thus realize the coiled tubing tractor that coiled tubing creeps forward automatically.
Technical scheme of the present invention is:
A kind of coiled tubing tractor, comprise axis of rotation, rotary sleeve A, rotary sleeve B, connected with outer casing, screw drive axle, motor joint and thrust bearing, it is characterized in that: axis of rotation is movably installed with rotary sleeve A, rotary sleeve A is equipped with rotary sleeve B by rotary sleeve, rotary sleeve A and rotary sleeve B is respectively arranged with spacing shoulder, is mutually connected together by the cooperation of spacing shoulder between rotary sleeve A and rotary sleeve B; Rotary sleeve A and rotary sleeve B is circumferentially movably installed with multiple connecting rod respectively by slip ring, is mutually flexibly connected between connecting rod by backup block; The axis of rotation of rotary sleeve A side is provided with connected with outer casing by thrust bearing, and on the axis of rotation in connected with outer casing, screw thread is provided with motor joint, and the axis of rotation in motor joint is equipped with screw drive axle by screw rod shell.
Described backup block is symmetrically installed with back-moving spring, and one end of back-moving spring is connected with connecting rod respectively.
Described motor joint is fixedly connected with connected with outer casing by set bolt.
Motor joint is connected with screw rod outer casing screw.
The axis of rotation that described rotary sleeve A is corresponding is provided with cylindrical cam A, the rotary sleeve A inwall that cylindrical cam A is corresponding is provided with cam rail groove A, the axis of rotation that rotary sleeve B is corresponding is provided with cylindrical cam B, the rotary sleeve B inwall that cylindrical cam B is corresponding is provided with cam rail groove B, and rotary sleeve A and rotary sleeve B is slidably connected with coordinating of cam rail groove B with cam rail groove A and cylindrical cam B respectively by cylindrical cam A with between axis of rotation.
Described cam rail groove A and cam rail groove are respectively cannelure.
In arranging in opposite directions between described cam rail groove A and cam rail groove B.
Described cylindrical cam A and cylindrical cam B is made up of installation cylinder, rolling ring and gland respectively, the top of installing cylinder is movably installed with rolling ring by chute, installation cylinder above rolling ring is provided with top cover by bolt, and top cover and rolling ring are slidably connected.
Beneficial effect of the present invention is:
During the work of this coiled tubing tractor, be that power drive screw drive axle rotates with drilling mud, power is convenient to be obtained.The mode utilizing cam rail groove and cylindrical cam to combine realizes down-hole automatic reverse, and simple and reliable for structure, owing to being Purely mechanical, deducted cable and control section, make instrument not easy break-down, reliability improves greatly.Efficiently solve because coiled tubing is comparatively large at down-hole frictional resistance, under enter and take out difficult, the pressure of the drill to be difficult to the technical barriers such as applying, coiled tubing can be extended longer in down-hole.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the A place structure for amplifying schematic diagram of Fig. 1;
Fig. 3 be Fig. 1 A-A to cam rail groove and the connection diagram of cylindrical cam;
Fig. 4 is the structural representation of cylindrical cam of the present invention;
Fig. 5 is the expansion schematic diagram of cam rail groove of the present invention;
Fig. 6 is cam rail groove of the present invention and cylindrical cam relative motion figure.
In figure: 1, axis of rotation, 2, rotary sleeve A, 3, rotary sleeve B, 4, connected with outer casing, 5, screw drive axle, 6, motor joint, 7, thrust bearing, 8, cylindrical cam A, 9, cam rail groove A, 10, cylindrical cam B, 11, cam rail groove B, 12, cylinder is installed, 13, rolling ring, 14, gland, 15, slip ring, 16, connecting rod, 17, backup block, 18, back-moving spring, 19, screw rod shell, 20, set bolt, 21, discharge orifice, 22, stop shoulder.
Detailed description of the invention
This coiled tubing tractor comprises axis of rotation 1, rotary sleeve A2, rotary sleeve B3, connected with outer casing 4, screw drive axle 5, motor joint 6 and thrust bearing 7.Axis of rotation 1 is movably installed with rotary sleeve A2, rotary sleeve A2 is set with rotary sleeve B3 by axis of rotation 1, rotary sleeve A2 and rotary sleeve B3 is respectively arranged with spacing shoulder, is mutually connected together by the cooperation of spacing shoulder between rotary sleeve A2 and rotary sleeve B3.
The axis of rotation 1 that rotary sleeve A2 is corresponding is provided with cylindrical cam A8, the rotary sleeve A2 inwall that cylindrical cam A8 is corresponding is provided with cam rail groove A9.
The axis of rotation 1 that rotary sleeve B3 is corresponding is provided with cylindrical cam B10, the rotary sleeve B3 inwall that cylindrical cam B10 answers is provided with cam rail groove B11, rotary sleeve A2 and being slidably connected with coordinating of cam rail groove B11 with cam rail groove A9 and cylindrical cam B10 respectively by cylindrical cam A8 between rotary sleeve B3 with axis of rotation 1.Cam rail groove A9 and cam rail groove B11 is respectively cannelure.
In arranging in opposite directions between cam rail groove A9 and cam rail groove B11.
Cylindrical cam A8 and cylindrical cam B10 is made up of installation cylinder 12, rolling ring 13 and gland 14 respectively, the top of installing cylinder 12 is movably installed with rolling ring 13 by chute, installation cylinder 12 above rolling ring 13 is provided with top cover 14 by bolt, and top cover 14 and rolling ring 13 are slidably connected.
Rotary sleeve A2 and rotary sleeve B3 is circumferentially movably installed with multiple connecting rod 16 respectively by slip ring 15, is mutually flexibly connected between connecting rod 16 by backup block 17.Backup block 17 is symmetrically installed with back-moving spring 18, one end of back-moving spring 18 is connected with connecting rod 16 respectively.
The axis of rotation 1 of rotary sleeve A2 side is provided with connected with outer casing 4 by thrust bearing 7, the axis of rotation 1 inside thrust bearing 7 arranges stop shoulder 22, its effect drives connected with outer casing 4 to move ahead.On axis of rotation 1 in connected with outer casing 4, screw thread is provided with motor joint 6, and the axis of rotation 1 in motor joint 6 is equipped with screw drive axle 5 by screw rod shell 19.
The motor joint 6 of this coiled tubing tractor is fixedly connected with connected with outer casing 4 by set bolt 20.Be threaded between motor joint 6 with screw rod shell 19.
This coiled tubing tractor is that power drive screw drive axle 5 rotates with drilling mud, then drives axis of rotation 1 to rotate with screw drive axle 5 for power, axis of rotation 1 has discharge orifice 21 as slurry outlet.For ensureing that axis of rotation 1 does not pull screw drive axle 5, design motor joint 6 is connected with screw rod shell 19, is connected compresses between motor joint 6 with connected with outer casing 4 by set bolt 20.Axis of rotation 1 arranges shoulder and installed thrust bearing 7 bears axial force, make axial force transmission arrive connected with outer casing 4, thus be delivered to screw rod shell 19, make screw drive axle 5 not be subject to larger axial force.
During work, first coiled tubing is connected with screw rod shell 19, due to screw drive axle 5, to connect below coiled tubing quality large, make the cylindrical cam on axis of rotation 1 only driven rotary cover rotate, rotary sleeve A2 slip ring 15 right side promoted on it that moves right moves axially.Rotary sleeve B3 is moved to the left slip ring 15 left side promoted on it and moves axially.Connecting rod 16 on rotary sleeve A2 and rotary sleeve B3 shrinks under slip ring 15 moves axially drive in opposite directions, thus makes backup block 17 compress the borehole wall.
Axis of rotation 1 continues to rotate, because backup block 17 compresses the borehole wall, rotary sleeve is subject to active force and can not moves, axis of rotation 1 and rotary sleeve form relative motion, axis of rotation 1 is moved forward, under connected with outer casing 4 acts on, drive coiled tubing below to move right, realize coiled tubing distraction procedure to the right thus, after coiled tubing advance certain distance, the relative motion of cam rail groove and cylindrical cam is reverse, and rotary sleeve A2 is moved to the left, and rotary sleeve B3 moves right, backup block 17 departs from the borehole wall, returns original state.So repeatedly, until reach the traction of coiled tubing maximum distance.
This coiled tubing tractor realizes the traction work of coiled tubing by the relative motion between rotary sleeve and axis of rotation 1, when cylindrical cam moves to the vertex position close to cam rail groove, connecting rod 16 on rotary sleeve A2 and rotary sleeve B3 is in the maximum rating strutted, thus makes backup block 17 compress the borehole wall.Now, cylindrical cam continues to run to the vertex position of cam rail groove, in this process, because connecting rod 16 is in the maximum rating strutted, rotary sleeve is stuck, but cylindrical cam continues the trend keeping motion, and now axis of rotation 1 moves ahead relative to rotary sleeve, thus drive screw rod shell 19 to move ahead by connected with outer casing 4, motor joint 5, drive coiled tubing to move ahead thus.
When cylindrical cam moves downward from the vertex position of cam rail groove, connecting rod 16 Stepwize Shrink, thus make backup block 17 depart from the borehole wall.Compare existing apparatus and deducted cable and control section, its reliability is improved greatly.Efficiently solve because coiled tubing is comparatively large at down-hole frictional resistance, under enter and take out difficult, the pressure of the drill to be difficult to the technical barriers such as applying, coiled tubing can be extended longer in down-hole.
Claims (8)
1. a coiled tubing tractor, comprise axis of rotation (1), rotary sleeve A(2), rotary sleeve B(3), connected with outer casing (4), screw drive axle (5), motor joint (6) and thrust bearing (7), it is characterized in that: (1) is movably installed with rotary sleeve A(2 to axis of rotation), rotary sleeve A(2) on be set with rotary sleeve B(3 by axis of rotation (1)), rotary sleeve A(2) and rotary sleeve B(3) on be respectively arranged with spacing shoulder, rotary sleeve A(2) and rotary sleeve B(3) between be mutually connected together by the cooperation of spacing shoulder; Rotary sleeve A(2) and rotary sleeve B(3) be circumferentially movably installed with multiple connecting rod (16) respectively by slip ring (15), be mutually flexibly connected by backup block (17) between connecting rod (16); Rotary sleeve A(2) side axis of rotation (1) on by thrust bearing (7), connected with outer casing (4) is installed, the upper screw thread of axis of rotation (1) in connected with outer casing (4) is provided with motor joint (6), and the axis of rotation (1) in motor joint (6) is equipped with screw drive axle (5) by screw rod shell (19).
2. a kind of coiled tubing tractor according to claim 1, is characterized in that: described backup block (17) is symmetrically installed with back-moving spring (18), and one end of back-moving spring (18) is connected with connecting rod (16) respectively.
3. a kind of coiled tubing tractor according to claim 1, is characterized in that: described motor joint (6) is fixedly connected with connected with outer casing (4) by set bolt (20).
4. a kind of coiled tubing tractor according to claim 1, is characterized in that: motor joint (6) is threaded with screw rod shell (19).
5. a kind of coiled tubing tractor according to claim 1, it is characterized in that: described rotary sleeve A(2) corresponding axis of rotation (1) is provided with cylindrical cam A(8), cylindrical cam A(8) corresponding rotary sleeve A(2) inwall is provided with cam rail groove A(9), rotary sleeve B(3) corresponding axis of rotation (1) is provided with cylindrical cam B(10), cylindrical cam B(10) corresponding rotary sleeve B(3) inwall is provided with cam rail groove B(11), rotary sleeve A(2) and rotary sleeve B(3) with between axis of rotation (1) respectively by cylindrical cam A(8) with cam rail groove A(9) and cylindrical cam B(10) with cam rail groove B(11) coordinate and be slidably connected.
6. a kind of coiled tubing tractor according to claim 5, is characterized in that: described cam rail groove A(9) be respectively cannelure with cam rail groove (11).
7. a kind of coiled tubing tractor according to claim 1, is characterized in that: described cam rail groove A(9) and cam rail groove B(11) between in arranging in opposite directions.
8. a kind of coiled tubing tractor according to claim 1, it is characterized in that: described cylindrical cam A(8) and cylindrical cam B(10) be made up of installation cylinder (12), rolling ring (13) and gland (14) respectively, the top of installing cylinder (12) is movably installed with rolling ring (13) by chute, the installation cylinder (12) of rolling ring (13) top is provided with top cover (14) by bolt, and top cover (14) and rolling ring (13) are slidably connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510838327.0A CN105332667B (en) | 2015-11-26 | 2015-11-26 | A kind of coiled tubing tractor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510838327.0A CN105332667B (en) | 2015-11-26 | 2015-11-26 | A kind of coiled tubing tractor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105332667A true CN105332667A (en) | 2016-02-17 |
| CN105332667B CN105332667B (en) | 2018-07-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510838327.0A Expired - Fee Related CN105332667B (en) | 2015-11-26 | 2015-11-26 | A kind of coiled tubing tractor |
Country Status (1)
| Country | Link |
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| CN (1) | CN105332667B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105649561A (en) * | 2016-03-10 | 2016-06-08 | 长江大学 | Coiled tubing tractor |
| CN107605418A (en) * | 2017-10-27 | 2018-01-19 | 中国石油集团渤海钻探工程有限公司 | A kind of coiled tubing waterpower draws crawl device |
| CN108086933A (en) * | 2016-11-21 | 2018-05-29 | 中国石油天然气股份有限公司 | cable conveying device for horizontal well |
Citations (8)
| 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 |
| CN2806749Y (en) * | 2005-03-13 | 2006-08-16 | 高进伟 | Downhole wheel-type self-adapting pipe crawler for horizontal well |
| CN1823208A (en) * | 2003-07-16 | 2006-08-23 | 施蓝姆伯格技术公司 | Open hole tractor with tracks |
| US20070181298A1 (en) * | 2006-02-09 | 2007-08-09 | Sheiretov Todor K | Self-anchoring device with force amplification |
| CN201004288Y (en) * | 2006-09-29 | 2008-01-09 | 路宗新 | A cam structure teaching tool |
| CN202116692U (en) * | 2011-05-18 | 2012-01-18 | 上海普罗新能源有限公司 | Rotary lifting mechanism of composite cylindrical cam of thermal switch of polysilicon ingot furnace |
| CN204476253U (en) * | 2015-02-10 | 2015-07-15 | 山东科瑞国际油气工程有限公司 | A kind of down-hole screw motor transmission device |
| CN205172494U (en) * | 2015-11-26 | 2016-04-20 | 长江大学 | Coiled tubing tractor |
-
2015
- 2015-11-26 CN CN201510838327.0A patent/CN105332667B/en not_active Expired - Fee Related
Patent Citations (8)
| 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 |
| CN1823208A (en) * | 2003-07-16 | 2006-08-23 | 施蓝姆伯格技术公司 | Open hole tractor with tracks |
| CN2806749Y (en) * | 2005-03-13 | 2006-08-16 | 高进伟 | Downhole wheel-type self-adapting pipe crawler for horizontal well |
| US20070181298A1 (en) * | 2006-02-09 | 2007-08-09 | Sheiretov Todor K | Self-anchoring device with force amplification |
| CN201004288Y (en) * | 2006-09-29 | 2008-01-09 | 路宗新 | A cam structure teaching tool |
| CN202116692U (en) * | 2011-05-18 | 2012-01-18 | 上海普罗新能源有限公司 | Rotary lifting mechanism of composite cylindrical cam of thermal switch of polysilicon ingot furnace |
| CN204476253U (en) * | 2015-02-10 | 2015-07-15 | 山东科瑞国际油气工程有限公司 | A kind of down-hole screw motor transmission device |
| CN205172494U (en) * | 2015-11-26 | 2016-04-20 | 长江大学 | Coiled tubing tractor |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105649561A (en) * | 2016-03-10 | 2016-06-08 | 长江大学 | Coiled tubing tractor |
| CN105649561B (en) * | 2016-03-10 | 2017-10-17 | 长江大学 | A kind of coiled tubing tractor |
| CN108086933A (en) * | 2016-11-21 | 2018-05-29 | 中国石油天然气股份有限公司 | cable conveying device for horizontal well |
| CN108086933B (en) * | 2016-11-21 | 2020-05-08 | 中国石油天然气股份有限公司 | Cable conveying device for horizontal well |
| CN107605418A (en) * | 2017-10-27 | 2018-01-19 | 中国石油集团渤海钻探工程有限公司 | A kind of coiled tubing waterpower draws crawl device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105332667B (en) | 2018-07-24 |
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Granted publication date: 20180724 Termination date: 20201126 |