CN102808589B - Motor-driven underground tractor for coiled tubing - Google Patents
Motor-driven underground tractor for coiled tubing Download PDFInfo
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- CN102808589B CN102808589B CN201210290226.0A CN201210290226A CN102808589B CN 102808589 B CN102808589 B CN 102808589B CN 201210290226 A CN201210290226 A CN 201210290226A CN 102808589 B CN102808589 B CN 102808589B
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Abstract
The invention belongs to the field of oil and gas field development and relates to a tractor used for drilling, logging and well repair engineering of a coiled tubing and favorable for the coiled tubing to extend into a horizontal well section for a longer distance. A motor-driven underground tractor for the coiled tubing comprises an upper tractor system, a hexagonal central sliding pipe and a lower tractor system, wherein the upper tractor system comprises an upper supporting unit, an upper electric drive and control unit and an upper traction unit; and the upper tractor system and the lower tractor system have the same structure, and are connected at the upper part and the lower part of the hexagonal central sliding pipe respectively in a sleeving way and mounted in the same or opposite direction. The tractor is directly driven and controlled by a servo stepper motor, so that the dependence on liquid energy in the process of driving the tractor by using circulating liquid and the complexity of control of a hydraulic valve of the circulating liquid on a pipeline are reduced and most of space occupied by the hydraulic pipeline is saved; and the tractor can perform dual-direction traction, is good in stability, flexible in traction and fast in traction speed, can be suitable for underground traction work of small well holes, and can guarantee normal underground liquid circulation in the traction process.
Description
Technical field
The invention belongs to oil-gas field development field, particularly, relate to a kind of for coiled tubing drilling, well logging, well workover engineering, contribute to the tractor that coiled tubing enters longer distance under net horizontal section.
Background technology
Due to coiled tubing purposes widely: can be used to make cleaning pipeline flushing sand plug, wax removal, selective acidizing, product is asked in gaslift, squeeze method shutoff, kill-job, underbalance perforating, well testing, displacement drilling fluid, high-angle borehole logging, horizontal wellbore logging, completion, salvage, remove and set expansion type dispenser, bore plug, grinding fish, permanent installation is as producing pipe, make a video recording in shaft bottom, little experience drilling well, secondary drilling well and intensification drilling well, casing window sidetracking, oil pipe subsidy etc., horizontal well drilling can be carried out, cased hole drilling well, open hole well drilling well, deepen drilling well, slimhole drilling, Microdrilling drilling well, old well window sidetracking, under balance pressure drilling and well workover, the operations such as completion, the feature such as coiled tubing drilling has low cost, low energy consumption, safety and environmental protection, have wide range of applications, the development benefit that the difficulty such as old filed, " low pressure, hypotonic, low yield " three low oil-gas reservoirs employs oil-gas reservoir can be improved, especially, in the exploration and development of the unconventional gas reservoir of China, tight gas, shale gas and coal bed gas etc., have a wide range of applications.But coiled tubing underground work technology also exists urgent problem: coiled tubing non rotating in the wellbore when one, drilling well, transfer and be hampered seriously, the pressure of the drill applies difficulty.Two, coiled tubing down-hole is hampered, and extends well length limited, and especially when boring high angle hole, directional well, horizontal well, deep-well, the slide problem that is hampered of coiled tubing down-hole is even more serious.For addressing these problems, the multiple downhole tractor of petroleum drilling and mining industry design,
Downhole tractor and down-hole crawl device, being also down-hole climbing mechanism, underground tractor, downhole tractor device people, downhole hydraulic pressurizer, downhole drill bit propeller etc., is a kind of 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) three kinds, and wherein wheeled appearance the earliest, telescopicly takes second place, and crawler type the latest.Traction crawl device can be divided into continuous pipe type (Coiled Tubing Tractor), cable type (Wireline Tractor) and hybrid three kinds of continuous-tube cable by its energy source.Wherein continuous pipe type traction crawl device is connected with continuous-tube at its afterbody, and ground pumps into highly pressurised liquid by continuous-tube, and high pressure liquid drives traction crawl device inner turbine mechanism, for whole traction crawling device provides energy.Cable type traction climbing mechanism is then obtain energy by being connected to its tail cable from ground.Continuous-tube cable mixed traction climbing mechanism then both pumps into highly pressurised liquid by ground provides energy drives, can pass through cable transfer electrical energy drive again.
In the later stage nineties 20th century, external many companies develop can at the horizontal well draw-gear (namely cable puller) of down-hole independently working.Through development for many years, up to the present, representational tractor product mainly comprises: the wheeled tractor of Welltec company of Denmark Well Tractor, the wheeled tractor of Sondex of Sondex Co., Ltd of Britain, the wheeled tractor of PowerTrac Advance of Maritime Well Service (MWS) company of Norway, PowerTrac INVADER crawler type tractor, the telescopic tractor of SmarTract of ExproGroup company of Britain, the telescopic tractor of MaxTRAC of Schlumberger company of France, the telescopic tractor of Microhole DrillingTractor of Western Well Tool company of the U.S..Wherein the telescopic tractor of Microhole DrillingTractor of U.S. Western Well Tool company be coiled tubing formula drive by ground cleaner for high-pressure drilling fluid, the tractor that can be used for slim-hole, ground circulation of drilling fluid of can remaining valid during work; Remaining tractor is mostly wheeled or crawler type, and Outside Dimensions is comparatively large, and be only applicable to large hole, connect with cable or wire rope, electric drive, tractive force is less, can not carry out effective circulation of drilling fluid during work, is generally limited to the application of well logging industry.
But no matter be that tractor, for domestic, all take strict technical know-how measure abroad, the domestic research to downhole tractor is caused also to be in the infancy: from August, 2002, Tarim Oilfield is by the mode of technological cooperation, adopt downhole tractor technology to carry out the exploration of horizontal well industry profile logging, achieve certain effect.After this, domestic minority scientific research institutions have also carried out the research of downhole tractor in succession, mainly contain China University Of Petroleum Beijing, Harbin Institute of Technology, Southwest Petroleum Institute, Daqing Petroleum Institute, Xi'an Petroleum University etc., also the patent of some tractors has been applied for, but some shortcomings of these tractors existence more or less, and be mostly confined to utilize circulation fluid to compress into row cutting control, not direct servo step motor carry out tractor drive with control, the requirement of underground work can not be met preferably.
The people such as China University Of Petroleum Beijing Gao Jinwei, Liu Meng are at document (Gao Jinwei, Liu Meng, Yan Xiangzhen. wheeled self-adapting pipe crawl device under Horizontal Well: China) in propose a kind of structural concept of wheeled drag device, and applied for utility model patent (200520008070.8.2006-08-16, puller reducing draught device of horizontal borehole of quill), Harbin Institute of Technology also have developed the wheeled drag device (Tang Dewei of a cable, Wang Xinjie, Deng Zongquan. Driver of horizontal oil well detecting instruments. Harbin Institute of Technology journal .2007,39 (9): 1395-1397), and carried out ground experiment, a kind of wheeled tractor of the flat designed, designed of Xi'an Petroleum University Zhu Lin, Wu Song (Zhu Lin, Wu Songping. the design of horizontal wellbore logging instrument traction crawl device. New Technologies, 2007, (12): 32-34), Liaohe Petroleum Exploration Bureau proposes the wheeled tractor (200720190260.5 with independent intellectual property right, puller reducing draught device of horizontal borehole of quill), and the underground trials that Great Wall in 2008 probing Logging Company has carried out its tractor developed at four mouthfuls of water horizontal wells of Liaohe Oil Field, also some other scientific research institutions has also carried out the research of wheeled tractor related fields, but these tractors have some common ground: be all wheeled tractor, all that cable connects without circulation, it is all well logging, the underground work tractor that the tractive force such as well workover are little, therefore there is a lot of defect, major defect is as follows: (one) wheeled tractor overall structure is not compact, outside dimension is large, be only applicable to large hole, towage under slim hole well can not be applicable to, adapt to caliber limited in one's ability, (2) electric drive relying on cable or wire rope to connect, effectively can not connect coiled tubing and be undertaken driving and realize effective circulation of drilling fluid by ground hydraulic, (3) tractive force is less, is only applicable to draw logging cable or wire rope etc., (4) major part can not realize bi-directional drive.
Daqing Petroleum Institute Shao keeps monarch, Chang Yulian propose a kind of rise lock piston type walking telescopic drag device (Shao Shoujun. based on the oil well fault-finding robot research of virtual prototype. Daqing Petroleum Institute's Master's thesis .2007:5 ~ 7) primarily of electric component, hydraulic package, upper support walking assembly, lower support walking assembly and probe assembly composition, by solenoid operated directional valve, four hydraulic cylinders are controlled, make, lower support walking assembly realizes alternately stretching or withdrawal on request, stretch out and indentation, thus realize independently advancing, but there is very large defect in this tractor: (one) tractive force is less, theoretical maximum is 5000N only, be only applicable to draw logging cable or wire rope etc., traction coiled tubing cannot be realized and carry out underground work, (2) make hydraulic mechanism carry out work with stube cable to electric component drive motors of powering, do not provide circulation of drilling fluid passage in tractor, the Efficient Cycle on down-hole liquid and ground in operation process cannot be realized, (3) support system and directive wheel part adopt linkage, make structure not compact, and tractor external diameter is comparatively large, and the borehole diameter that can be suitable for is limited in scope (Φ 90-Φ 130mm).
Effect China is wished by Southwest Petrol University, Hu Zhiqiang, (201110081197.2 of the application such as Shi Changshuai, continuous oil pipe crawler and method of creeping thereof) continuous oil pipe crawler and the method for creeping thereof be by front crawling device, controller and rear crawling device composition, although be adopt coiled tubing to connect, ground hydraulic device is utilized to drive, but this patent obvious Shortcomings part: (one) traction element adopts upper and lower two traction fluid cylinders to carry out traction drive and control, make traction element long, supporting mechanism adopts single fluid cylinder to drive and spring reverse motion, make tractor fluid pressure line complicated, minimum applicable borehole diameter is larger, be not suitable for traction in slim-hole to advance, (2) because coiled tubing underground work makes coiled tubing Inner eycle press consumption larger, adopt pure hydraulic-driven and control, tractor inside and outside differential pressure minimum value be there are certain requirements, tractor could be driven normally to work after only having ground pump pressure to reach certain value, make this tractor larger to ground pressure dependence, traction control is dumb, (3) just proposition hydraulic pressure carries out drived control concept, but does not provide the pipeline embodiment of concrete hydraulic-driven and control, (4) supporting mechanism adopts pole structure, makes the minimum applicable borehole diameter of tractor comparatively large, is not suitable for towage in slim-hole,
Summary of the invention
For overcoming the defect of prior art, a kind of motor is the object of the present invention is to provide to drive coiled tubing downhole tractor, its utilize four servomotors effectively drive with control tractor down-hole draw Coiled Tubing smoothly under enter and take out, solve because underground continuous oil pipe frictional resistance is larger, under enter and take out coiled tubing difficulty etc. technical barrier, coiled tubing can be extended longer in down-hole.
In order to achieve the above object, the present invention adopts following technical scheme:
A kind of motor drives coiled tubing downhole tractor to comprise retractor system, comprises retractor system, six side center slip pipes, lower retractor system; Upper retractor system and lower retractor system are enclosed within the upper and lower of six side center slip pipes respectively.
Preferably, in the middle of six side center slip pipes, there is the circulation hydrophthalmia of hollow circular, outside in regular hexagon, be respectively equipped with lower traction unit correspondence position in six slip pipe tops, side center and upper traction unit correspondence position and bottom and give prominence to flange, lower outstanding flange; Shang Liufang center slip pipe screw rod and Xia Liufang center slip pipe screw rod respectively by bolts assemblies on upper outstanding flange, lower outstanding flange.
Preferably, upper retractor system, lower retractor system structure are identical, and the installation direction on six side center slip pipes is identical or contrary.
Preferably, upper retractor system comprises support unit, upper electric drive and control unit and upper traction unit from top to bottom successively.
Preferably, upper support unit comprises upper slips bearing, upper slips housing, upper slips, upper slips locking sliding block, upper slips expansion link, upper screw rod propelling slide block; Upper slips bearing is the cylinder axially with regular hexagon hole, and upper slips bearing is enclosed within six side center slip pipes and also can be in axial sliding by relative six side center slip pipes; In the lower end in the regular hexagon hole of upper slips bearing, there is internal thread, be circumferentially evenly equipped with three upper slips bearing slide opening latch assemblies in the outside of upper slips bearing bottom; Upper slips housing is the cylinder with regular hexagon hole, and upper slips housing is enclosed within six side center slip pipes and also can be in axial sliding by relative six side center slip pipes; Have external screw thread in the upper end of upper slips housing, upper slips housing and upper slips bearing are threaded connection integrally, and are enclosed within six side center slip pipes, can be in axial sliding by relative six side center slip pipes; Along the circumferential direction be evenly equipped with three upper slips housing slide opening latch assemblies at the middle part of upper slips housing, upper slips housing slide opening latch assembly is corresponding up and down with upper slips bearing slide opening latch assembly; Upper slips has three, and three upper slipses are uniformly distributed along upper slips housing circumference, and upper slips upper end is connected with upper slips bearing by upper slips bearing slide opening latch assembly, and upper slips lower end is connected with upper slips housing by upper slips housing slide opening latch assembly; Upper slips bearing slide opening and upper slips housing slide opening are elongated hole, thus make upper slips slide opening latch when opening and shrink in elongated hole, have certain axial displacement space; Upper slips housing outside circumferencial direction is evenly provided with three chutes vertically, the lower end of chute is provided with upper slips and stretches rod aperture, the stretch lower end of rod aperture of upper slips is provided with screw rod and advances slide cavity, upper screw rod advances slide cavity lower end to be provided with screw rod locating hole, and upper screw rod locating hole lower end arranges the installation cavity of screw drive rotor, upper slips drive motors module, upper motor retainer ring, upper control module; Three upper slips locking sliding blocks are contained in three chutes respectively, and the lower end of upper slips locking sliding block is connected with upper slips expansion link; Upper slips expansion link is contained in upper slips and stretches in rod aperture, and upper slips expansion link lower end and upper screw rod advance slide block to be connected.
Preferably, upper electric drive and control unit comprise screw rod, upper screw drive rotor, upper slips drive motors module, upper motor retainer ring, upper control module from top to bottom successively; Three upper screw rods are longitudinal positioning of in three upper screw rod locating holes of upper slips housing, upper end and the upper screw rod of upper screw rod advance slide block to be connected by screw-driven, the lower end of upper screw rod is connected by gear with upper screw drive rotor, and upper slips drive motors module is fixedly connected with and drives screw drive rotor; Upper slips drive motors module is fixed in upper slips housing by upper motor retainer ring, and upper screw rod, upper screw drive rotor, upper slips drive motors module, upper motor retainer ring and upper control module are all contained in the cavity of upper slips housing; The lower end of upper slips housing is provided with internal thread.
Preferably, upper traction unit comprises traction drive motor, upper traction housing, upper traction rotor, upper traction housing bearing; Upper traction housing is the hollow circular cylinder of upper end with hexagonal hole, upper traction housing can be in axial sliding by relative six side center slip pipes, the upper end of upper traction housing has external screw thread, lower end has radial location latch screw, and the upper end of upper traction housing and the lower end of upper slips housing are threaded connection; The fixing upper traction drive motor in upper end in upper traction housing hollow, upper traction drive motor lower end connects and drives draws rotor, and upper traction rotor internal cavity is processed with traction armature nut, and upper traction armature nut is connected with Shang Liufang center slip pipe screw drive; Upper traction housing bearing is the hollow circular cylinder with hexagonal hole, and upper traction housing bearing upper end is with radial location latch screw, and upper traction housing bearing can be in axial sliding by relative six side center slip pipes; Upper traction housing lower end is connected by radial location latch with upper traction housing bearing; Upper control module controls upper traction drive motor and upper slips drive motors module by the size of moment of torsion and the number of revolution.Upper control module can according to the size of the positive and negative rotation direction of upper slips drive motors module, rotating speed, revolution number, moment of torsion size respectively the slips of tractor support system to be opened or closed, the speed of slips opening and closing, the degree of slips opening and closing, the size of slips support force control; Upper control module can according to the size of the positive and negative rotation direction of upper traction drive motor, rotating speed, revolution number, moment of torsion size respectively to traction unit on tractor and lower traction unit to upper traction and downward lead, the size of hauling speed, the traction size of displacement, the size of tractive force control.
Preferably, upper slips and upper slips locking sliding block are processed with the inclined plane cooperatively interacted, and the angle on inclined-plane can ensure to slide when upper slips locking sliding block moves up to expand upper slips; Upper slips has certain elasticity, can expand under the effect of upper slips locking sliding block, closed in external force elimination situation.
Compared with prior art, tool of the present invention has the following advantages in the present invention:
1, eachly directly to be driven by servo step motor, decrease the dependence to liquid energy when utilizing circulation fluid to drive, no matter with or without circulation fluid energy, as long as can be energized, traction can both be carried out in down-hole to creep: the tractor of studies in China mainly stresses hydraulically powered wheeled and telescopic, higher to hydraulic pressure dependence, drive system more complicated;
2, directly controlled by servo step motor, comprise the size of promptly slips stretching degree, grasp, the distance that traction is creeped, the size of tractive force: each servo step motor directly controls an action, control simple, decrease the complexity utilizing circulation fluid hydraulic valve control piper, and the space that most of fluid pressure line occupies can be saved;
3, promptly slips one-tenth is axially uniform three in each upper tractor assembly, makes tractor be not easy upset, good stability;
4, traction flexibly, hauling speed is fast: directly use servo step motor drived control, and intermediate transmission structure is less, the flexibility that tractor is drawn up and down and speed speed largely depend on the flexibility that servo step motor controls and speed, and servo step motor controls relatively convenient, flexible, speed control range is large, and therefore draw flexibly with the tractor that servo step motor controls, hauling speed is fast;
5, tractor is applicable to towage under slim hole well: the support system of domestic a lot of tractor adopts tie-bar support structure or pipe wheeled construction, make minimum applicable borehole diameter larger, be not suitable for small diameter borehole towage, the support unit that tractor of the present invention adopts is inclined-plane slip extrapolation slips expansion type structure, support section is compacter, is applicable to the down-hole towage of small diameter;
6, can ensure in distraction procedure that normal down-hole liquid circulates: most domestic tractor is well logging tractor, normal drilling fluid or flushing fluid circulation can not be ensured in work, tractor of the present invention reserves inner cycle channel, can effectively ensure that fluid circulates in underground work process.
Accompanying drawing explanation
Fig. 1 is that motor drives coiled tubing tractor schematic front view;
Fig. 2 is that motor drives coiled tubing tractor schematic top plan view;
Fig. 3 a be motor when driving coiled tubing tractor upper slips to open the first half along A-A generalized section in Fig. 2;
Fig. 3 b be motor when driving coiled tubing tractor upper slips to close the first half along A-A generalized section in Fig. 2;
Fig. 4 is that motor drives coiled tubing tractor along B-B schematic cross-section in Fig. 3;
Fig. 5 is that motor drives coiled tubing tractor along C-C schematic cross-section in Fig. 3;
Fig. 6 is that motor drives coiled tubing tractor along D-D schematic cross-section in Fig. 3;
Fig. 7 is that motor drives coiled tubing tractor along E-E schematic cross-section in Fig. 3;
Fig. 8 is that motor drives coiled tubing tractor along F-F schematic cross-section in Fig. 3;
Fig. 9 is that motor drives coiled tubing tractor along G-G schematic cross-section in Fig. 3;
Figure 10 a is that motor drives coiled tubing tractor upper slips and lower slips schematic front view;
Figure 10 b is that motor drives coiled tubing tractor upper slips and lower slips schematic top plan view;
Figure 11 a be motor when driving coiled tubing tractor lower slips to open the latter half along A-A generalized section in Fig. 2;
Figure 11 b be motor when driving coiled tubing tractor lower slips to close the latter half along A-A generalized section in Fig. 2;
Figure 12 a is that motor drives retractor system and the downward schematic front view of lower retractor system installation direction on coiled tubing tractor;
Figure 12 b is that motor drives retractor system and the relative schematic front view of lower retractor system installation direction on coiled tubing tractor;
Figure 12 c is that motor drives retractor system and lower retractor system installation direction upwards schematic front view on coiled tubing tractor.
In figure: 1, upper retractor system, 2, six side center slip pipes, 3, lower retractor system; 11, upper support unit, 12, upper electric drive and control unit, 13, upper traction unit; 21, Shang Liufang center slip pipe screw rod, 22, upper outstanding flange, 23, Xia Liufang center slip pipe screw rod, 24, lower outstanding flange; 31, lower support unit, 32, lower electric drive and control unit, 33, lower traction unit; 111, upper slips bearing, 112, upper slips bearing slide opening latch assembly, 113, internal thread, 114, upper slips housing, 115, upper slips, 116, upper slips locking sliding block, 117, upper slips expansion link, 118, upper slips housing slide opening latch assembly, 119, upper screw rod advances slide block; 121, upper screw rod, 122, upper screw drive rotor, 123, upper slips drive motors module, 124, upper motor retainer ring, 125, upper control module; 131, upper traction drive motor; 132, upper traction housing, 133, upper traction rotor, 134, upper traction armature nut, 135, upper traction housing bearing; 311, lower slips bearing, 312, lower slips bearing slide opening latch assembly, 313, internal thread, 314, lower slips housing, 315, lower slips, 316, lower slips locking sliding block, 317, lower slips expansion link, 318, lower slips housing slide opening latch assembly, 319, lower screw rod advances slide block; 321, lower screw rod, 322, lower screw drive rotor, 323, lower slips drive motors module, 324, lower motor retainer ring, 325, lower control module; 331, lower traction drive motor, 332, lower traction housing, 333, lower traction rotor, 334, lower traction armature nut, 335, lower traction housing bearing.
Detailed description of the invention
As shown in Figure 1-2, motor drives coiled tubing downhole tractor, comprises retractor system 1, six side center slip pipe 2, lower retractor system 3; Upper retractor system 1 and lower retractor system 3 are enclosed within the upper and lower of six side center slip pipes 2 respectively.
As Figure 1-3, there is the circulation hydrophthalmia of hollow circular, outside in regular hexagon in the middle of six side center slip pipes 2, be respectively equipped with lower traction unit 33 correspondence position in six slip pipe tops, side center and upper traction unit 13 correspondence position and bottom and give prominence to flange 22, lower outstanding flange 24; Shang Liufang center slip pipe screw rod 21 and Xia Liufang center slip pipe screw rod 23 respectively by bolts assemblies on upper outstanding flange 22, lower outstanding flange 24; Six slip pipe 2 upper end, side center connecting downhole coiled tubings, lower end connects bottom hole assemblies.
As shown in Figure 1, upper retractor system 1 comprises support unit 11, upper electric drive and control unit 12 and upper traction unit 13 from top to bottom successively.
As shown in Fig. 1, Fig. 3, Fig. 4, upper support unit 11 comprises upper slips bearing 111, upper slips housing 114, upper slips 115, upper slips locking sliding block 116, upper slips expansion link 117, upper screw rod propelling slide block 119; As shown in Figure 2 and Figure 3, upper slips bearing 111 is the cylinder axially with regular hexagon hole, and upper slips bearing 111 is enclosed within six side center slip pipes 2 and also can be in axial sliding by relative six side center slip pipes 2; In the lower end in the regular hexagon hole of upper slips bearing 111, there is internal thread 113, be circumferentially evenly equipped with three upper slips bearing slide opening latch assemblies 112 in the outside of upper slips bearing 111 bottom; As shown in Figure 3, Figure 4, upper slips housing 114 is for having the cylinder in regular hexagon hole, and upper slips housing 114 is enclosed within six side center slip pipes 2 and also can be in axial sliding by relative six side center slip pipes 2; Have external screw thread in the upper end of upper slips housing 114, upper slips housing 114 and upper slips bearing 111 are threaded connection integrally, and are enclosed within six side center slip pipes 2, can be in axial sliding by relative six side center slip pipes 2.As shown in Figure 2, Figure 3, Figure 4, be along the circumferential direction evenly equipped with three upper slips housing slide opening latch assemblies 118 at the middle part of upper slips housing 114, upper slips housing slide opening latch assembly 118 is corresponding with upper slips bearing slide opening latch assembly about 112; Upper slips 115 has three, three upper slipses 115 are uniformly distributed along upper slips housing circumference, upper slips 115 upper end is connected with upper slips bearing 111 by upper slips bearing slide opening latch assembly 112, and upper slips 115 lower end is connected with upper slips housing 114 by upper slips housing slide opening latch assembly 118; Upper slips bearing slide opening and upper slips housing slide opening are elongated hole, thus make upper slips 115 slide opening latch when opening and shrink in elongated hole, have certain axial displacement space.As shown in Fig. 3, Fig. 6, Fig. 7, upper slips housing 114 outside circumferencial direction is evenly provided with three chutes vertically, the lower end of chute is provided with upper slips and stretches rod aperture, the stretch lower end of rod aperture of upper slips is provided with screw rod and advances slide cavity, upper screw rod advances slide cavity lower end to be provided with screw rod locating hole, and upper screw rod locating hole lower end arranges the installation cavity of screw drive rotor 122, upper slips drive motors module 123, upper motor retainer ring 124, upper control module 125; Three upper slips locking sliding blocks 116 are contained in three chutes respectively, and the lower end of upper slips locking sliding block 116 is connected with upper slips expansion link 117; Upper slips expansion link 117 is contained in upper slips and stretches in rod aperture, and upper slips expansion link 117 lower end and upper screw rod advance slide block 119 to be connected.
As shown in Fig. 3, Fig. 8, Fig. 9, upper electric drive and control unit 12 comprise screw rod 121, upper screw drive rotor 122, upper slips drive motors module 123, upper motor retainer ring 124, upper control module 125 from top to bottom successively; Three upper screw rods 121 are longitudinal positioning of in three upper screw rod locating holes of upper slips housing 114, upper end and the upper screw rod of upper screw rod 121 advance slide block 119 to be connected by screw-driven, the lower end of upper screw rod 121 is connected by gear with upper screw drive rotor 122, and upper slips drive motors module 123 is fixedly connected with and drives screw drive rotor 122; Upper slips drive motors module 123 is fixed in upper slips housing by upper motor retainer ring 124, and upper screw rod 121, upper screw drive rotor 122, upper slips drive motors module 123, upper motor retainer ring 124 and upper control module 125 are all contained in the cavity of upper slips housing 114.The lower end of upper slips housing 114 is provided with internal thread.
As shown in Figure 1, Figure 3, upper traction unit 13 comprises traction drive motor 131, upper traction housing 132, upper traction rotor 133, upper traction housing bearing 135.
As shown in Fig. 3, Fig. 7, Fig. 8, Fig. 9, upper traction housing 132 is the hollow circular cylinder of upper end with hexagonal hole, upper traction housing 132 can be in axial sliding by relative six side center slip pipes 2, the upper end of upper traction housing 132 has external screw thread, lower end has radial location latch screw, and the upper end of upper traction housing 132 and the lower end of upper slips housing 114 are threaded connection; The fixing upper traction drive motor 131 in upper end in upper traction housing hollow, upper traction drive motor 131 lower end connects and drives traction rotor 133, upper traction rotor 133 embedded SMA actuators has upper traction armature nut 134, and upper traction armature nut 134 is in transmission connection with Shang Liufang center slip pipe screw rod 21; Upper traction housing bearing 135 is the hollow circular cylinder with hexagonal hole, upper traction housing bearing 135 upper end is with radial location latch screw corresponding to the upper end radial location latch screw with upper traction housing 132, and upper traction housing bearing 135 can be in axial sliding by relative six side center slip pipes 2; Upper traction housing 132 lower end is connected by radial location latch screw with upper traction housing bearing 135.
As shown in Figure 3, upper control module 125 controls upper traction drive motor 131 and upper slips drive motors module 123 by the size of moment of torsion and the number of revolution.
As shown in Fig. 3, Figure 10, Figure 11, upper slips 115 and upper slips locking sliding block 116 are processed with the inclined plane cooperatively interacted, and the angle on inclined-plane can ensure to slide when upper slips locking sliding block 116 moves up to expand upper slips 115; Upper slips has certain elasticity, can expand under the effect of upper slips locking sliding block 116, closed in external force elimination situation.
Lower trailer system 1 is identical with upper trailer system 3 structure, briefly explains below.
As shown in Figure 1, lower retractor system 3 comprises support unit 31, lower electric drive and control unit 32 and lower traction unit 33 from top to bottom successively.
As shown in Fig. 1, Figure 12, lower support unit 31 comprises lower slips bearing 311, lower slips housing 314, lower slips 315, lower slips locking sliding block 316, lower slips expansion link 317, lower screw rod propelling slide block 319.As shown in Figure 1, Figure 2, shown in Figure 12, lower slips bearing 311 is the cylinder axially with regular hexagon hole, and lower slips bearing 311 to be enclosed within six side center slip pipes 2 and can be in axial sliding by relative six side center slip pipes 2; In the upper end in the regular hexagon hole of lower slips bearing 311, there is internal thread 313, be circumferentially evenly equipped with three lower slips bearing slide opening latch assemblies 312 in the outside of lower slips bearing 311 upper end.
Shown in Figure 12, lower slips housing 314 is for having the cylinder in regular hexagon hole, and lower slips bearing 311 is enclosed within six side center slip pipes 2 and also can be in axial sliding by relative six side center slip pipes 2; Have external screw thread in the lower end of lower slips housing 314, lower slips housing 314 and lower slips bearing 311 are threaded connection integrally, and are enclosed within six side center slip pipes 2, can be in axial sliding by relative six side center slip pipes 2.
Shown in Figure 12, be along the circumferential direction evenly equipped with three lower slips housing slide opening latch assemblies 318 at the middle part of lower slips housing 314, lower slips housing slide opening latch assembly 318 is corresponding with lower slips bearing slide opening latch assembly about 312; Lower slips 315 has three, three lower slipses 315 are uniformly distributed along lower slips housing circumference, lower slips 315 lower end is connected with lower slips bearing 311 by lower slips bearing slide opening latch assembly 312, and lower slips 315 upper end is connected with lower slips housing 314 by lower slips housing slide opening latch assembly 318; Lower slips bearing slide opening and lower slips housing slide opening are elongated hole, have certain axial displacement space to make lower slips 315 slide opening latch when opening and shrink in elongated hole.
As shown in figure 12, lower slips housing 314 outside circumferencial direction is evenly provided with three chutes vertically, be provided with lower slips to stretch rod aperture in the upper end of chute, the stretch upper end of rod aperture of lower slips is provided with lower screw rod and advances slide block 316 cavity, lower screw rod advances slide cavity upper end to be provided with lower screw rod locating hole, and the upper end of lower screw rod locating hole arranges lower screw drive rotor 322, lower slips drive motors module 323, lower motor retainer ring 324, lower control module 325 install cavity; Three lower slips locking sliding blocks 316 are contained in three chutes respectively, and the upper end of lower slips locking sliding block 316 is connected with lower slips expansion link 317; Lower slips expansion link 317 is contained in lower slips and stretches in rod aperture, and lower slips expansion link 317 upper end advances slide block 319 to be connected with lower screw rod.
As shown in Fig. 2, Figure 12, lower electric drive and control unit 32 comprise lower screw rod 321, lower screw drive rotor 322, lower slips drive motors module 323, lower motor retainer ring 324, lower control module 325 from top to bottom successively; Three lower screw rods 321 are longitudinal positioning of in three lower screw rod locating holes of lower slips housing 314, the lower end of lower screw rod 321 advances slide block 319 to be connected by screw-driven with lower screw rod, the upper end of lower screw rod 321 is connected by gear with lower screw drive rotor 322, and lower slips drive motors module 323 is fixedly connected with and drives down screw drive rotor 322; Lower slips drive motors module 323 is fixed in lower slips housing by lower motor retainer ring 324, and lower screw rod 321, lower screw drive rotor 322, lower slips drive motors module 323, lower motor retainer ring 324 and lower control module 325 are all contained in the cavity of lower slips housing 314.
As shown in Figure 1, Figure 2, shown in Figure 12, lower traction unit 33 comprises lower traction drive motor 331, lower traction housing 332, lower traction rotor 333, lower traction housing bearing 335.
As shown in figure 12, lower traction housing 332 is the hollow circular cylinder of lower end with hexagonal hole, lower traction housing 332 lower end has external screw thread, upper end has internal thread, lower traction housing 332 can be in axial sliding by relative six side center slip pipes 2; The lower end of lower traction housing 332 and the upper end of lower slips housing 314 are threaded connection; The fixing lower traction drive motor 331 in lower end in lower traction housing hollow, lower traction drive motor 331 upper end connects and drives down traction rotor 333, lower traction rotor 333 embedded SMA actuators has lower traction armature nut 334, and lower traction armature nut 334 is in transmission connection with Xia Liufang center slip pipe screw rod 23; Lower traction housing bearing 335 is the hollow circular cylinder with hexagonal hole, and the upper end of lower traction housing bearing 335 is with radial location latch screw, and lower traction housing bearing 335 can be in axial sliding by relative six side center slip pipes 2; Lower traction housing 332 upper end is connected by radial location latch with lower traction housing bearing 335.
As shown in figure 12, lower control module 325 controls lower traction drive motor 331 and lower slips drive motors module 323 by the size of moment of torsion and the number of revolution.
As shown in Figure 10, Figure 11, lower slips 315 and lower slips locking sliding block 316 are processed with the inclined plane cooperatively interacted, and the angle on inclined-plane can ensure to slide when lower slips locking sliding block 316 moves down to expand lower slips 315; Lower slips has certain elasticity, can expand under the effect of lower slips locking sliding block 316, closed in external force elimination situation.
Motor of the present invention drives the motion state of coiled tubing downhole tractor can input instruction by ground and controls upper control module 125 and lower control module 325 respectively, and its control principle is as follows:
(1), upper retractor system 1 control principle: after upper control module 125 receives ground signal, upper slips drive motors module 123 forward or reverse can be driven, screw drive rotor 122 and upper screw rod 121 forward or reverse in drive, the screw rod slide block mechanism lead-screw of slide block 119 is advanced to advance slide block 119 to advance or retreat by upper screw rod 121 with upper screw rod, screw rod propelling slide block 119 promotes upper slips locking sliding block 116 by upper slips expansion link 117 and advances or retreat, when slips locking sliding block 116 advances, elastic deformation is there is by scalene cone extrapolation upper slips 115, and slide along upper slips bearing slide opening and upper slips housing slide opening, it is made to open the promptly borehole wall, the size of tensile force can be controlled by the moment of torsion of drive motors module 123, the number of turns that the degree of opening can be rotated by upper slips drive motors module 123 and angle control, when slips locking sliding block 116 retreats, slips locking sliding block 116 leaves with the scalene cone of upper slips 115, and extrapolability disappears, and upper slips 115 is retracted to minimum outer diameter state under the effect of natural resiliency and borehole wall extruding force.After upper control module 125 receives ground signal, control traction rotor 133 and upper traction armature nut 134 forward or reverse in upper traction drive motor 131 forward or reverse, drive simultaneously, by Shang Liufang center slip pipe screw rod 21 mechanism on six side center slip pipes 2, in promotion, retractor system 1 does relative sliding up or down along six side center slip pipes 2, complete traction function, the size of its tractive force, displacement and direction can respectively by the output torque of upper traction drive motor 131, revolutions with positive and negatively transfer control.
(2), lower retractor system 3 control principle: after lower control module 325 receives ground signal, lower slips drive motors module 323 forward or reverse can be driven, drive lower screw drive rotor 322 and lower screw rod 321 forward or reverse, the screw rod slide block mechanism lead-screw of slide block 319 is advanced to advance slide block 319 to advance or retreat by screw rod 321 and upper screw rod, screw rod propelling slide block 319 promotes lower slips locking sliding block 316 by lower slips expansion link 317 and advances or retreat, when slips locking sliding block 316 advances, elastic deformation is there is by scalene cone extrapolation lower slips 315, and slide along lower slips bearing slide opening and lower slips housing slide opening, it is made to open the promptly borehole wall, the size of tensile force can be controlled by the moment of torsion of drive motors module 323, the number of turns that the degree of opening can be rotated by lower slips drive motors module 323 and angle control, when under slips locking sliding block 316 retreat time, lower slips locking sliding block 316 leaves with the scalene cone of lower slips 315, and extrapolability disappears, and lower slips 315 is retracted to minimum outer diameter state under the effect of natural resiliency and borehole wall extruding force.After lower control module 325 receives ground signal, control lower traction drive motor 331 forward or reverse simultaneously, drive lower traction rotor 333 and lower traction armature nut 334 forward or reverse, by Shang Liufang center slip pipe screw rod 21 mechanism on six side center slip pipes 2, promote lower retractor system 3 and do relative sliding up or down along six side center slip pipes 2, complete traction function, the size of its tractive force, displacement and direction can respectively by the output torque of lower traction drive motor 331, revolutions with positive and negatively transfer control.
(3), upper control module 125 and lower control module 325 connect each other each other, according to the difference of the sequencing of the course of work, there is phase difference in upper control module 125 and the control of lower control module 325 to each motor module, ensures carrying out smoothly of tractor work.
(4), the reaction utilizing the outside hexagon of six side center slip pipes 2 to hinder six side center slip pipes 2 to rotate about the axis forms axial thrust force principle: except upper screw drive rotor 122, upper traction rotor 133 can outside six side center slip pipes 2 rotate as axis, upper retractor system 1, six side center slip pipes 2, lower retractor system 3 all can not be rotated around six side center slip pipe 2 axis, can only along axial sliding movement, reason is as follows: when upper traction drive motor 131 drives upper traction rotor 133 to rotate around six side center slip pipe 2 axis, upper traction rotor 133 drives upper traction armature nut 134 to rotate, upper traction armature nut 134 drives Shang Liufang center slip pipe screw rod 21 to move, because slip pipe 2 outside, Shang Liufang center is six sides, make the same traction drive motor 131 of Shang Liufang center slip pipe 2, upper traction housing 132, upper traction housing bearing 135, lower slips bearing 311, upper slips housing 114, upper slips 115 grade is an entirety on rotating about the axis, the traction armature nut 134 hindered on Shang Liufang center slip pipe 2 rotates, the reaction hindered produces end thrust to Shang Liufang center slip pipe screw rod 21, draw the relative slips of six side center slip pipes 2 and do axial-movement, on the contrary, if Shang Liufang center slip pipe 2 is round, Shang Liufang center slip pipe 2 will rotate with the driving of upper traction armature nut 134, and the end thrust of upper traction armature nut 134 pairs of Shang Liufang center slip pipe screw rods 21 cannot be formed, and tractor just loses the function along axis traction.
(5), built-in 8 core cables complete transmission of electricity and wire signal transfer function: the power supply of general upper control module 125 and lower control module 325 has three kinds of modes, one is the built-in 8 core cables of coiled tubing, both can complete transmission of electricity, wire signal transmission can be realized again; Two is bury cable outside coiled tubing tube wall, but so relatively less; Three is that coiled tubing configures multicore cable outward, completes transmission of electricity function and signal transfer functions; The present invention can adopt built-in 8 core cables to complete transmission of electricity and wire signal transfer function.
Motor of the present invention drives the course of work of coiled tubing downhole tractor as follows:
(1), original state: upper support unit 11 and lower support unit 31 are all in and open the promptly borehole wall, and upper retractor system 1 is in the top of six side center slip pipes 2, and lower retractor system 3 is in six side center slip pipes 2 bottom.
(2), upper support unit 11 shrinks and leaves the borehole wall, and lower support unit 31 is still in and opens promptly borehole wall state; Upper traction unit 13 and lower traction unit 33 motionless.
(3), upper traction unit 13 draws the distance that the upper relative six side center slip pipes 2 of retractor system 1 move down a upper traction armature nut 134; Same traction unit 33 at present draws the six side center slip pipes 2 lower support unit 31 with the borehole wall fixed relative to upper retractor system 1 and moves down the distance of drawing armature nut 334 under; Upper retractor system 1 is equivalent to the distance along drawing the length sum of armature nut 334 under the borehole wall has moved down upper traction armature nut 134 length and, and six side center slip pipes 2 have been equivalent to underground moving the distance of upper traction armature nut 134 length.
(4), upper support unit 11 opens the promptly borehole wall, and lower support unit 31 is still in and opens promptly borehole wall state; Upper traction unit 13 and lower traction unit 33 motionless.
(5), upper support unit 11 opens the promptly borehole wall, and lower support unit 31 shrinks and leaves the borehole wall;
(6), lower traction unit 33 draws the lower relative six side center slip pipes 2 of retractor system 3 and moves down the distance of drawing armature nut 334 under; Go up traction unit 13 to draw the six side center slip pipes 2 upper support unit 11 with the borehole wall fixed relative to lower retractor system 3 and move down a upper distance of drawing armature nut 134 simultaneously; Lower retractor system 3 is equivalent to the distance along drawing the length sum of armature nut 334 under the borehole wall has moved down upper traction armature nut 134 length and, and six side center slip pipes 2 have been equivalent to underground moving the distance of drawing armature nut 334 length under.
(7), upper support unit 11 is still in and opens promptly borehole wall state, and lower support unit 31 opens the promptly borehole wall, original state that tractor returns to ().
Move back and forth successively by the order of " (one) → (two) → (three) → (four) → (five) → (six) → (seven) → (one) ", tractor can be made constantly to draw Coiled Tubing creep to down-hole, under enter coiled tubing; Otherwise the order of " (seven) → (six) → (five) → (four) → (three) → (two) → (one) → (seven) " moves back and forth, tractor can be made constantly to draw Coiled Tubing creep to aboveground, take out coiled tubing.
Upper retractor system, lower retractor system structure are identical, and the installation direction on six side center slip pipes is identical or contrary: both can install as shown in Figure 1, also can as Figure 12 a, and 12b, 12c install.
Claims (6)
1. motor drives a coiled tubing downhole tractor, comprises retractor system, six side center slip pipes, lower retractor system; Upper retractor system and lower retractor system are enclosed within the upper and lower of six side center slip pipes respectively; Upper retractor system, lower retractor system structure are identical; Upper retractor system, the lower retractor system installation direction on six side center slip pipes is identical or contrary; There is the circulation hydrophthalmia of hollow circular, outside in regular hexagon in the middle of six side center slip pipes, be respectively equipped with lower traction unit correspondence position in six slip pipe tops, side center and upper traction unit correspondence position and bottom and give prominence to flange, lower outstanding flange; Shang Liufang center slip pipe screw rod and Xia Liufang center slip pipe screw rod respectively by bolts assemblies on upper outstanding flange, lower outstanding flange; Upper retractor system comprises support unit, upper electric drive and control unit and upper traction unit from top to bottom successively; It is characterized in that: upper support unit comprises upper slips bearing, upper slips housing, upper slips, upper slips locking sliding block, upper slips expansion link, upper screw rod propelling slide block; Upper slips bearing is the cylinder axially with regular hexagon hole, and upper slips bearing is enclosed within six side center slip pipes and also can be in axial sliding by relative six side center slip pipes; In the lower end in the regular hexagon hole of upper slips bearing, there is internal thread, be circumferentially evenly equipped with three upper slips bearing slide opening latch assemblies in the outside of upper slips bearing bottom; Upper slips housing is the cylinder with regular hexagon hole, and upper slips housing is enclosed within six side center slip pipes and also can be in axial sliding by relative six side center slip pipes; Have external screw thread in the upper end of upper slips housing, upper slips housing and upper slips bearing are threaded connection integrally, and are enclosed within six side center slip pipes, can be in axial sliding by relative six side center slip pipes; Along the circumferential direction be evenly equipped with three upper slips housing slide opening latch assemblies at the middle part of upper slips housing, upper slips housing slide opening latch assembly is corresponding up and down with upper slips bearing slide opening latch assembly; Upper slips has three, and three upper slipses are uniformly distributed along upper slips housing circumference, and upper slips upper end is connected with upper slips bearing by upper slips bearing slide opening latch assembly, and upper slips lower end is connected with upper slips housing by upper slips housing slide opening latch assembly; Upper slips bearing slide opening and upper slips housing slide opening are elongated hole, thus make upper slips slide opening latch when opening and shrink in elongated hole, have certain axial displacement space; Upper slips housing outside circumferencial direction is evenly provided with three chutes vertically, the lower end of chute is provided with upper slips and stretches rod aperture, the stretch lower end of rod aperture of upper slips is provided with screw rod and advances slide cavity, upper screw rod advances slide cavity lower end to be provided with screw rod locating hole, and upper screw rod locating hole lower end arranges the installation cavity of screw drive rotor, upper slips drive motors module, upper motor retainer ring, upper control module; Three upper slips locking sliding blocks are contained in three chutes respectively, and the lower end of upper slips locking sliding block is connected with upper slips expansion link; Upper slips expansion link is contained in upper slips and stretches in rod aperture, and upper slips expansion link lower end and upper screw rod advance slide block to be connected.
2. motor according to claim 1 drives coiled tubing downhole tractor, it is characterized in that: upper electric drive and control unit comprise screw rod from top to bottom successively, and described upper screw drive rotor, upper slips drive motors module, upper motor retainer ring, upper control module; Three upper screw rods are longitudinal positioning of in three upper screw rod locating holes of upper slips housing, upper end and the upper screw rod of upper screw rod advance slide block to be connected by screw-driven, the lower end of upper screw rod is connected by gear with upper screw drive rotor, and upper slips drive motors module is fixedly connected with and drives screw drive rotor; Upper slips drive motors module is fixed in upper slips housing by upper motor retainer ring, and upper screw rod, upper screw drive rotor, upper slips drive motors module, upper motor retainer ring and upper control module are all contained in the cavity of upper slips housing; The lower end of upper slips housing is provided with internal thread.
3. motor according to claim 2 drives coiled tubing downhole tractor, it is characterized in that: upper traction unit comprises traction drive motor, upper traction housing, upper traction rotor, upper traction housing bearing; Upper traction housing is the hollow circular cylinder of upper end with hexagonal hole, upper traction housing can be in axial sliding by relative six side center slip pipes, the upper end of upper traction housing has external screw thread, lower end has radial location latch screw, and the upper end of upper traction housing and the lower end of upper slips housing are threaded connection; The fixing upper traction drive motor in upper end in upper traction housing hollow, upper traction drive motor lower end connects and drives draws rotor, and upper traction rotor internal cavity is processed with traction armature nut, and upper rotor part nut is connected with Shang Liufang center slip pipe screw drive; Upper traction housing bearing is the hollow circular cylinder with hexagonal hole, and upper traction housing bearing upper end is with radial location latch screw, and upper traction housing bearing can be in axial sliding by relative six side center slip pipes; Upper traction housing lower end is connected by radial location latch with upper traction housing bearing; Upper control module controls upper traction drive motor and upper slips drive motors module by the size of positive and negative rotation direction, rotating speed, the number of revolution, the size of moment of torsion.
4. motor according to claim 3 drives coiled tubing downhole tractor, it is characterized in that: upper slips and upper slips locking sliding block are processed with the inclined plane cooperatively interacted, the angle on inclined-plane can ensure to slide when upper slips locking sliding block moves up to expand upper slips; Upper slips has certain elasticity, can expand under the effect of upper slips locking sliding block, closed in external force elimination situation.
5. motor according to claim 4 drives coiled tubing downhole tractor, it is characterized in that: upper control module by the size of the positive and negative rotation direction to upper slips drive motors, rotating speed, revolution number, moment of torsion size control, and then respectively the slips of tractor support system is opened or close, the speed of slips opening and closing, the degree of slips opening and closing, the size of slips support force control; Upper control module by the size of the positive and negative rotation direction to upper traction drive motor, rotating speed, revolution number, moment of torsion size control, and then respectively the lead up and down of traction unit on tractor and lower traction unit, the size of hauling speed, the traction size of displacement, the size of tractive force to be controlled.
6. motor according to claim 5 drives coiled tubing downhole tractor, and it is characterized in that: according to the difference of the sequencing of the course of work, the control of upper control module to upper traction drive motor, upper slips drive motors module exists phase difference.
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| CN201210290226.0A CN102808589B (en) | 2012-08-16 | 2012-08-16 | Motor-driven underground tractor for coiled tubing |
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