CN102704870B - Coiled tubing clamping device and injection head using same - Google Patents
Coiled tubing clamping device and injection head using same Download PDFInfo
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- CN102704870B CN102704870B CN201210116842.4A CN201210116842A CN102704870B CN 102704870 B CN102704870 B CN 102704870B CN 201210116842 A CN201210116842 A CN 201210116842A CN 102704870 B CN102704870 B CN 102704870B
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- clamping device
- grip block
- coiled tubing
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- 238000002347 injection Methods 0.000 title claims abstract description 25
- 239000007924 injection Substances 0.000 title claims abstract description 25
- 238000005096 rolling process Methods 0.000 claims description 21
- 239000011148 porous material Substances 0.000 claims description 7
- 238000005553 drilling Methods 0.000 abstract description 2
- 230000005540 biological transmission Effects 0.000 abstract 2
- 238000005299 abrasion Methods 0.000 abstract 1
- 230000009286 beneficial effect Effects 0.000 description 7
- 238000010008 shearing Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000005465 channeling Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 210000001138 tear Anatomy 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/22—Handling reeled pipe or rod units, e.g. flexible drilling pipes
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Clamps And Clips (AREA)
Abstract
The invention provides a coiled tubing clamping device and an injection head using the same, belonging to the field of oil production and drilling equipment. The clamping device includes a saddle-type clamping block and a clamping block seat, wherein the saddle-type clamping block is connected to the clamping block seat. The clamping device is characterized in that two sides of the saddle-type clamping block are provided with tongue-like platforms, the tongue-like platform is provided with an opening hole, the back part of the saddle-type clamping block is provided with a recess, two sides of the clamping block seat are respectively provided with a pair of bosses, the recess of the saddle-type clamping block is inserted into a slot formed by the clamping block seat bosses, a running clearance is left between the recess and the slot, and the clamping block seat is provided with a positioning screw for limiting the position of the saddle-type clamping block. The injection head comprises an oil pipe clamping mechanism and a transmission chain, wherein the oil pipe clamping mechanism is mounted on the transmission chain through two hinge pin holes on the clamping block seat. The technical proposal has the advantages that the abrasion of the oil pipe can be effectively reduced, the clamping device has operational reliability, and the clamping blocks are convenient in replacement.
Description
Technical field
The present invention relates to oil drilling and extracting equipment field, particularly a kind of coiled tubing clamping device, also relates to the injection head that adopts this clamping device.
Background technology
Injection head is the core component of continuous oil pipe device, and clamping device provides clamping force for injection head, for delivery of coiled tubing.The clamping device with rolling element using at present conventional injection head is because the syndeton reason between grip block and clamping block exists following defect: the one, and the grip block using on clamping device can not slide on clamping block, the active centering that is unfavorable for grip block is adjusted, cause the oil pipe that weares and teares, reduced the application life of oil pipe; The 2nd, traditional clamping device, grip block directly contacts between block with clamping, is unfavorable for cushioning the impact of grip block to oil pipe, to the serious wear of oil pipe.The patent No. is that 201120073047.2 utility model patent discloses a kind of coiled tubing clamping device, between its grip block and clamping block, by the boss on the hooked scarf on described grip block and described clamping block, be interlockingly connected, this makes the grip block can be along having certain play perpendicular to the direction of clamping oil pipe on clamping block, and by being located at limiting stand on described clamping block and the caging bolt relative with limiting stand, limits the play position of grip block.Although preferably resolve so above-mentioned because of stiff the brought problem of grip block, and it is comparatively easy that grip block is changed, but remain in following deficiency: because the random play of grip block in work produces shearing force frequently to caging bolt, cause this caging bolt fracture frequent, affect injection head continuous operation; Be need to move grip block so that hooked scarf and boss break off relations along oil pipe direction while changing grip block again, be awkward.
Summary of the invention
The technical problem to be solved in the present invention is, a kind of novel coiled tubing clamping device is provided, and to reduce the wearing and tearing of clamping device to clamping oil pipe, and it is more reliable that clamping device is used, and it is more convenient that grip block is changed.
In order to solve above technical problem, the present invention adopts following scheme:
A kind of coiled tubing clamping device, comprise saddle type grip block and clamping block, described clamping block comprises bearing pin and is set in the rolling element on described bearing pin, described clamping block is along bearing pin direction, be provided with two through holes that connect bearing pin for plug-in mounting injection head chain, the top of described clamping block is provided with three road dividing plates, is provided with the pin shaft hole for bearing pin is installed on described dividing plate;
Its feature is: the both sides of described saddle type grip block are provided with tongue platform, described tongue platform is provided with open pore, the back of described saddle type grip block is provided with groove, described clamping block both sides are respectively equipped with pair of projections, between described homonymy boss, form the draw-in groove corresponding with described groove, the groove of described saddle type grip block is inserted on the draw-in groove of described clamping block, between described groove and described draw-in groove, along described bearing pin direction, leave play gap, on described clamping block, be also provided with screwed hole, described screwed hole is provided with the dog screw for limiting described saddle type grip block position.
The invention has the beneficial effects as follows: because the draw-in groove forming by the boss on clamping block defines saddle type grip block along the direction play position perpendicular to clamping oil pipe, adopt dog screw to be fixed on described clamping block spacing saddle type grip block, so both guaranteed that grip block can have certain play with oil pipe, can dog screw not produced and be sheared again, avoid the wearing and tearing to oil pipe, also improved the reliability of injection head work; In addition, when needs are changed grip block, as long as screw out two dog screws, can make saddle type grip block depart from, be convenient to the maintenance of injection head.
On the basis of technique scheme, the present invention can also do following improvement.
Further, described dog screw is that plug is played screw, and the screw rod external diameter that described plug is played screw is less than the diameter of described open pore.
Adopt the beneficial effect of above-mentioned further scheme to be, plug is beaten the top of screw through the open pore of described saddle type grip block, and the restriction that grip block is clamped block draw-in groove can not produce shearing force to screw.
Further, also comprise the pad being padded between described saddle type grip block and described clamping block, described pad is provided with the spacing hole corresponding with the bottom thread hole of described clamping block, and described pad can be solid flat board, also can be provided with the hole of some.
Adopt the beneficial effect of above-mentioned further scheme to be, select elastomeric pad can effectively cushion the radial impact that oil pipe produces grip block, thereby protection oil pipe and grip block are not damaged.
Further, the end of described bearing pin is also provided with circlip for shaft.
Adopt the beneficial effect of above-mentioned further scheme to be, circlip for shaft is used for preventing that bearing pin from channeling bit.
Further, the circular arc of described saddle type grip block is provided with some grooves perpendicular to clamping oil pipe.
Adopt the beneficial effect of above-mentioned further scheme to be, groove can hold the impurity that enters grip block circular arc, and oil pipe is shielded.
Further, described rolling element is rolling bearing or Rolling bearing.
Adopt the beneficial effect of above-mentioned further scheme to be, rolling bearing or Rolling bearing roll in injection head push pedal, can reduce the resistance of motion of clamping device.
The present invention also provides a kind of coiled tubing injection head, it is characterized in that: comprise above-described coiled tubing clamping device.Concrete scheme is as follows:
A kind of oil pipe injection head, comprises drive sprocket, driving chain, gripper shoe, push pedal, clamping cylinder, is characterized in: described oil pipe clamping mechanism is installed on described driving chain.Clamping cylinder is fixed in gripper shoe, described oil pipe clamping mechanism is installed on driving chain, described push pedal is connected in gripper shoe by movable rod, the piston of clamping cylinder is pressed against described push pedal one side, and described push pedal another side is pressed on the rolling element of Holding seat of described oil pipe clamping mechanism.When oil pipe injection head is worked, push pedal compresses oil pipe clamping mechanism, and driving chain drives oil pipe clamping mechanism that oil pipe is fed forward, and Rolling bearing rolls on chain pressing plate.
The beneficial effect of this oil pipe injection head is: owing to adopting oil pipe clamping mechanism of the present invention, the servo-actuated gap of its grip block is large, can be at oil pipe while not being very straight, and grip block is automatically with moving, avoid the injured or wearing and tearing of oil pipe, and grip block easily changed.In clamping device, increase pad, reduced the impact of grip block to oil pipe, extended the application life of oil pipe.
Accompanying drawing explanation
Fig. 1 is the structural representation of coiled tubing clamping device of the present invention;
Fig. 2 is the grip block front view of coiled tubing clamping device of the present invention;
Fig. 3 is the grip block lateral view of coiled tubing clamping device of the present invention;
Fig. 4 is the clamping block front view of coiled tubing clamping device of the present invention;
Fig. 5 is the clamping block lateral view of coiled tubing clamping device of the present invention;
Fig. 6 is the clamping block upward view of coiled tubing clamping device of the present invention;
Fig. 7 is the pad front view of coiled tubing clamping device of the present invention;
Fig. 8 is a kind of oil pipe injection head schematic diagram that adopts coiled tubing clamping device of the present invention.
In Fig. 1-Fig. 7: 1, grip block, 2, dog screw, 3, pad, 4, clamping block, 5, rolling element, 6, bearing pin, 7, circlip for shaft; 101, groove, 102, tongue platform, 103, open pore; 104, groove, 301, spacing hole, 302, hole; 401, pin shaft hole, 402, through hole, 403, dividing plate, 404, screwed hole, 405, draw-in groove, 406, boss.
In Fig. 8: 5, rolling element, 11, oil pipe clamping mechanism, 12, drive sprocket, 13, driving chain, 14, gripper shoe, 15, push pedal, 16, clamping cylinder, 17, oil cylinder piston, 18, movable rod, 19, axle sleeve.
The specific embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is elaborated:
As shown in Fig. 1-Fig. 7: a kind of coiled tubing clamping device, comprise saddle type grip block 1 and clamping block 4, described clamping block 4 comprises bearing pin 6 and is set in the rolling element 5 on described bearing pin, described clamping block 4 is along bearing pin 6 directions, be provided with two through holes 402 that are connected bearing pin for plug-in mounting with injection head chain, the top of described clamping block 4 is provided with three road dividing plates 403, is provided with the pin shaft hole 401 for bearing pin 6 is installed on described dividing plate 403;
The both sides of described saddle type grip block 1 are provided with tongue platform 102, described tongue platform 102 is provided with open pore 103, the back of described saddle type grip block 1 is provided with groove 104, described clamping block 4 both sides are respectively equipped with pair of projections 406, between described homonymy boss, form the draw-in groove 405 corresponding with described groove 104, the groove 104 of described saddle type grip block is inserted on the draw-in groove 405 of described clamping block, between described groove 104 and described draw-in groove 405, along described bearing pin 6 directions, leave play gap, on described clamping block 4, be also provided with screwed hole 404, described screwed hole 404 is provided with the dog screw 2 for limiting described saddle type grip block 1 position.
Described dog screw 2 is that plug is played screw, and the screw rod external diameter that described plug is played screw is less than the diameter of described open pore 103.Described plug is played screw and is also check screw, and its structure is generally that head of screw, polished rod and screw mandrel connect successively, and polished rod diameter is greater than leading screw, at polished rod and screw mandrel junction, forms shoulder.
In concrete enforcement, the tongue platform 102 of described grip block 1 both sides is stuck on described polished rod, and making described grip block 1 relatively clamp block 4 has play gap at left and right directions, and this gap size is subject to the restriction of described draw-in groove 405; The shoulder that described plug is played screw is stuck on the round platform of described screwed hole 404, and screw mandrel is formed to position-limiting action, and making grip block 1 beat screw axial at edge plug also has certain free gap, to guarantee grip block 1 play flexibly.
The present invention also comprises the pad 3 being padded between described saddle type grip block 1 and described clamping block 4, described pad 3 is provided with the spacing hole corresponding with the bottom thread hole 404 of described clamping block 4 301, described pad 3 can be solid flat board, also can be provided with the hole 302 of some.
The end of described bearing pin 6 is also provided with circlip for shaft 7.
The circular arc of described saddle type grip block 1 is provided with some grooves 101 perpendicular to clamping oil pipe.
Described rolling element 5 is rolling bearing or Rolling bearing.
The present invention also provides a kind of injection head that adopts above-mentioned coiled tubing clamping device.Concrete scheme is as follows:
As shown in Figure 8: a kind of oil pipe injection head, comprise drive sprocket 12, driving chain 13, gripper shoe 14, push pedal 15, clamping cylinder 16, described gripper shoe 14, clamping cylinder 16, push pedal 15 etc. are arranged on the inside of described driving chain 13 closed loop that forms.Be characterized in: the described oil pipe clamping mechanism 11 of many groups is installed on described driving chain 13 continuously.Gripper shoe 14 is fixed in the frame of injection head, clamping cylinder 16 is fixed in gripper shoe 14, described oil pipe clamping mechanism 11 is installed on driving chain 13 by through hole 402, described push pedal 15 is connected in gripper shoe 14 by movable rod 18, in this example, one end of movable rod is oscillating bearing, be connected in push pedal 15, the other end inserts in the axle sleeve 19 being fixed in gripper shoe 14, and movable rod 18 can slide with push pedal 15 stressing conditions on axle sleeve 19.The oil cylinder piston 17 of clamping cylinder 16 is pressed against in the one side of described push pedal 15, and described push pedal 15 another sides are pressed on the rolling element 5 of Holding seat of described oil pipe clamping mechanism 11.When oil pipe injection head is worked, push pedal 15 compresses oil pipe clamping mechanism 11, and drive sprocket 12 drives driving chain 13, and drive oil pipe clamping mechanism 11 that oil pipe is fed forward, rolling element 5 rolls in push pedal 15, and under the effect of two the saddle type grip blocks in two opposites, oil pipe moves to direction initialization.
The foregoing is only preferred embodiments of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement etc., within all should being included in protection scope of the present invention.
Claims (7)
1. a coiled tubing clamping device, comprise saddle type grip block (1) and clamping block (4), described clamping block (4) comprises bearing pin (6) and is set in the rolling element (5) on described bearing pin, described clamping block (4) is along bearing pin (6) direction, be provided with two through holes (402) that connect bearing pin for plug-in mounting injection head chain, the top of described clamping block (4) is provided with three road dividing plates (403), is provided with the pin shaft hole (401) for bearing pin (6) are installed on described dividing plate (403);
It is characterized in that: the both sides of described saddle type grip block (1) are provided with tongue platform (102), described tongue platform (102) is provided with open pore (103), the back of described saddle type grip block (1) is provided with groove (104), described clamping block (4) both sides are respectively equipped with pair of projections (406), between boss described in homonymy (406), form the draw-in groove (405) corresponding with described groove (104), the groove (104) of described saddle type grip block is inserted on the draw-in groove (405) of described clamping block, between described groove (104) and described draw-in groove (405), along described bearing pin (6) direction, leave play gap, on described clamping block (4), be also provided with screwed hole (404), described screwed hole (404) is provided with the dog screw (2) for limiting described saddle type grip block (1) position.
2. coiled tubing clamping device according to claim 1, is characterized in that: described dog screw (2) is that plug is played screw.
3. coiled tubing clamping device according to claim 1 and 2, it is characterized in that: also comprise the pad (3) being padded between described saddle type grip block (1) and described clamping block (4), described pad (3) is provided with the spacing hole (301) corresponding with the bottom thread hole (404) of described clamping block (4).
4. coiled tubing clamping device according to claim 3, is characterized in that: the end of described bearing pin (6) is also provided with circlip for shaft (7).
5. coiled tubing clamping device according to claim 4, is characterized in that: the circular arc of described saddle type grip block (1) is provided with some grooves perpendicular to clamping oil pipe (101).
6. coiled tubing clamping device according to claim 5, is characterized in that: described rolling element (5) is rolling bearing or Rolling bearing.
7. an oil pipe injection head, is characterized in that: comprise the coiled tubing clamping device as described in claim 1～6 any one.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210116842.4A CN102704870B (en) | 2012-04-19 | 2012-04-19 | Coiled tubing clamping device and injection head using same |
| PCT/CN2012/074908 WO2013155734A1 (en) | 2012-04-19 | 2012-04-28 | Coiled tubing clamping mechanism and injector head using clamping mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210116842.4A CN102704870B (en) | 2012-04-19 | 2012-04-19 | Coiled tubing clamping device and injection head using same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102704870A CN102704870A (en) | 2012-10-03 |
| CN102704870B true CN102704870B (en) | 2014-05-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210116842.4A Active CN102704870B (en) | 2012-04-19 | 2012-04-19 | Coiled tubing clamping device and injection head using same |
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| Country | Link |
|---|---|
| CN (1) | CN102704870B (en) |
| WO (1) | WO2013155734A1 (en) |
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| US6173769B1 (en) * | 1998-04-30 | 2001-01-16 | Hydra Rig, Inc. | Universal carrier for grippers in a coiled tubing injector |
| US6332501B1 (en) * | 2000-02-03 | 2001-12-25 | Precision Drilling Corporation | Linear coiled tubing injector |
| US8132617B2 (en) * | 2008-10-27 | 2012-03-13 | David Brian Magnus | Gripper block |
| CN102155172A (en) * | 2011-03-18 | 2011-08-17 | 烟台杰瑞石油服务集团股份有限公司 | Floating clamping device for injection head of continuous oil pipe |
| CN202055781U (en) * | 2011-03-18 | 2011-11-30 | 烟台杰瑞石油服务集团股份有限公司 | Coiled tubing clamping device and injection head utilizing same |
| CN202578585U (en) * | 2012-04-19 | 2012-12-05 | 烟台杰瑞石油服务集团股份有限公司 | Coiled tubing clamping mechanism and injector head using same |
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| Publication number | Publication date |
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| WO2013155734A1 (en) | 2013-10-24 |
| CN102704870A (en) | 2012-10-03 |
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