CN103850676A - Novel casing coupling positioner for coiled tubing - Google Patents
Novel casing coupling positioner for coiled tubing Download PDFInfo
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- CN103850676A CN103850676A CN201210502372.5A CN201210502372A CN103850676A CN 103850676 A CN103850676 A CN 103850676A CN 201210502372 A CN201210502372 A CN 201210502372A CN 103850676 A CN103850676 A CN 103850676A
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- coiled tubing
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Abstract
The invention discloses a novel casing coupling positioner for a coiled tubing and relates to the field of downhole tools of an oil gas well for developing petroleum. The novel casing coupling positioner for the coiled tubing comprises a body, an upper cover cap, a positioning plate, spiral springs and a lower cover cap, the body is hollow column-shaped, an axial groove is opened in the outer wall of the body, the positioning plate is inserted in the axial groove, at least three uniformly distributed spiral grooves are mounted between the positioning plate and the axial groove, the upper cover cap and the lower cover cap are fixed on the body and respectively limit the positioning plate. The novel casing coupling positioner for the coiled tubing is capable of positioning precisely in a casing and realizing an obvious and uniform hanging load change when passing through the coupling and is very suitable for precisely positioning the coiled tubing in a non-air tight seal casing.
Description
Technical field
The present invention relates to oil development and use Oil/gas Well downhole tool field, exactly relate to a kind of coiled tubing new casing collar locator, this casing collar locator (CCL) can be realized the accurate location of underground continuous oil pipe in sleeve pipe, is applicable to need pinpoint thin interbed pressing crack construction.
Background technology
There are in the vertical multiple payzones in most domestic oil-gas reservoir, and mostly be thin interbed, what have even reaches more than 5 layers, in order to improve single well productivity and oil gas field ultimate recovery, after oil gas well drilling has been constructed, implementing fracture acidizing is the important modification measures of realizing well production increment.And must control comparatively accurately coiled tubing and instrument depth of setting thereof in this transformation process, just can make fracture acidizing effect reach optimum.
At present, the depth counter that continuous oil pipe operation equipment carries can not meet the pinpoint operation of these class needs, and the error that its 1000m produces is about 2m left and right, cannot meet job requirements.
Notice of authorization number is 202117663U, and notice of authorization day is that the Chinese patent literature on January 18th, 2012 discloses a kind of casing collar locator (CCL), is applied to oil field well coiled tubing and measures casing coupling position.On the outer wall of body, be evenly distributed with three axial notches, be embedded with a rectangle positioning wedged block at each axial notch of body; Compress Spring is arranged at the bottom at each groove of body, and the external surface of positioning wedged block is circular arc, has the arc convex of outwardly convex on positioning wedged block external surface, and there is inclined-plane at the two ends up and down of arc convex; Fixture block pressing plate in the groove of body and on the upper and lower end of positioning wedged block has, upper pin is fixed on upper fixture block pressing plate in the groove of body; Upper fixture block pressing plate and lower fixture block pressing plate block respectively positioning wedged block two ends.Effect is: the position that can carry out coiled tubing and carry out many thin layer oils gas well construction operation and judge box cupling.Adopt frame for movement to realize accurately location, simpler, durable than electronics collar locator, adapt to complicated severe underground construction environment.
But the prior art take above-mentioned patent documentation as representative, still there is following shortcoming in it;
1, in above-mentioned patent documentation, between this positioning wedged block and groove, be only provided with a spring, such form of structure, spring place is just equivalent to the strong point of lever, positioning wedged block is just equivalent to a lever, and coiled tubing be lowered to process and on carry in the process of coiled tubing, positioning wedged block upper, lower two ends can be distinguished first stressed, the two ends unbalance stress of positioning wedged block under the support of a spring, one end of positioning wedged block will upwarp, the other end will sink, even there will be the end portion of the side that positioning wedged block is relative with groove to be directly pressed on groove, thereby make coiled tubing be lowered to and on the suspending weight carried produce very significantly and change, stationarity is also affected, finally can cause the locating effect of locator to be had a greatly reduced quality.
2, on it, lower fixture block is that direct via pins is fixed in the groove of body, on, between lower fixture block and groove, be unsettled, this unsettled place leaves the free gap driving through telescopic spring for positioning wedged block, on, the end of lower fixture block is not fixed with body, such form of structure, on the one hand, due to the needs of unsettled setting, make, not fixing not firm in groove of lower fixture block, on the other hand, due to upper, one end of lower fixture block need to be subject to the extruding force of positioning wedged block for a long time, and on, the other end of lower fixture block is not fixed on again on body, therefore, itself just fixing illusive on, the easier stressed generation distortion of lower fixture block, on, the pin place of lower fixture block has just become the central pivot point of lever, on final positioning wedged block can be deviate from, fixing of lower fixture block, cause life of product greatly to reduce, this kind of form of structure, in real process, cannot extensively promote the use of at all.
Summary of the invention
For solving the problems of the technologies described above, the present invention proposes a kind of coiled tubing new casing collar locator, the present invention can realize accurate location in sleeve pipe, and can when through box cupling position, change obviously and evenly, be highly suitable for the accurate location of continuous oil pipe operation in non-hermetic seal sleeve pipe by suspending weight.
The present invention is by adopting following technical proposals to realize:
A kind of coiled tubing new casing collar locator, comprise body, upper cap, spacer, helical spring and lower cover cap, body is the cylindrical of hollow, it is characterized in that: on described body outer wall, have axial notch, be embedded with described spacer at axial notch, between described spacer and axial notch, be provided with at least three equally distributed described helical springs, described upper cap and lower cover cap are fixed on body, and upper cap and lower cover cap block respectively described spacer.
In three helical springs, the helical spring stiffness factor at both ends is greater than the helical spring stiffness factor of pars intermedia.
In three helical springs, be greater than the helical spring stiffness factor near that one end of lower cover cap near the helical spring stiffness factor of that one end of upper cap.
Described helical spring is four, the stiffness factor of middle two springs is consistent, the helical spring stiffness factor at both ends is greater than the helical spring stiffness factor of pars intermedia, is greater than the helical spring stiffness factor near that one end of lower cover cap near the helical spring stiffness factor of that one end of upper cap.
On described spacer, be provided with and hold described helical spring guide slot.
Described upper cap and lower cover cap are fixed on body through trip bolt, and upper cap and lower cover cap are close on described body, and upper cap and lower cover cap have a dip section that extends into axial notch, and this dip section is used for blocking described spacer.
The external surface of described spacer is provided with the projection that is circular arc, protruding upper end near that one end of upper cap is ramp, protruding lower end near that one end of lower cover cap is lower inclined plane, and the angle between ramp and spacer surface is less than the angle between lower inclined plane and spacer surface.
The number of described axial notch is along body outer wall equally distributed four.
Compared with prior art, the beneficial effect that the present invention reaches is as follows:
1, in the present invention, adopt and " between described spacer and axial notch, be provided with at least three equally distributed described helical springs, described upper cap and lower cover cap are fixed on body, and upper cap and lower cover cap block respectively described spacer " mode, with respect to prior art, three helical springs are uniformly distributed, when stressed, the two ends of spacer arrange the stressed of each place will be very even, thereby when be lowered to or on while carrying coiled tubing, the suspending weight of coiled tubing can not produce obvious variation, stationarity is very good, strengthen locator pinpoint effect in sleeve pipe.
2, in the present invention, adopt " in three helical springs, the helical spring stiffness factor at both ends is greater than the helical spring stiffness factor of pars intermedia " such mode, in actual use, no matter be sleeve pipe be lowered to or on carry in process, in the time that sleeve pipe just contacts with projection, stressed is upper end or the lower end of spacer at first, and middle part is stressed less, and in the present invention, because the helical spring stiffness factor at both ends is greater than the stiffness factor of pars intermedia, so, the helical spring at the both ends of spacer can be offset the adverse effect that is subject to larger extruding force at both ends greatly, thereby maintain better the stress equalization of whole spacer, the suspending weight that guarantees better coiled tubing does not produce obvious variation, further strengthen locator pinpoint effect in sleeve pipe.
3, in the present invention, adopt " being greater than the helical spring stiffness factor near that one end of lower cover cap near the helical spring stiffness factor of that one end of upper cap " such mode, with " in projection, angle above and between spacer surface is less than the angle between lower inclined plane and spacer surface " structure match, consider fully objective reality, the mitre of lower inclined plane coordinates with the helical spring of less stiffness factor and makes coiled tubing being lowered in process and can being lowered to more smoothly, the little angle of ramp can bear larger bearing capacity upper in putting forward process with handing over the helical spring of large stiffness factor to coordinate to make coiled tubing.
4, in the present invention, " be provided with on described spacer and hold described helical spring guide slot " such mode of employing, when spacer is in axial notch during along the radial floating of body, helical spring telescopic location is because the orientation of guide slot is just can only be along himself axis flexible and can not produce skew.
5, in the present invention, " described upper cap and lower cover cap are fixed on body through trip bolt in employing, upper cap and lower cover cap are close on described body, upper cap and lower cover cap have a dip section that extends into axial notch, this dip section is used for blocking described spacer " such form of structure, upper cap and lower cover cap are to be fixed on tightly on body, fixing more firm, and upper cap and lower cover cap only have dip section for blocking spacer, even prolonged use, dip section is subject to the power of body radial direction, because another of blocking a shot props up body, block is also not easy to produce loosening, extend application life.
6, on body circumference, be designed with the spacer of four equal distribution in the present invention, stressed when the casing coupling evenly and each spacer all has many group helical springs to support, spacer move up and down stressed steadily; New casing collar locator can be realized accurate location in sleeve pipe, and can when through box cupling position, change obviously and be even by suspending weight.
Accompanying drawing explanation
Below in conjunction with specification drawings and specific embodiments, the present invention is described in further detail, wherein:
Fig. 1 is structural representation of the present invention
Mark in figure:
1, body, 2, trip bolt, 3, upper cap, 4, spacer, 5, helical spring, 6, lower cover cap, 7, axial notch, 8, guide slot, 9, ramp, 10, lower inclined plane.
The specific embodiment
Embodiment 1
The invention discloses a kind of coiled tubing new casing collar locator, formed by body 1, upper cap 3, spacer 4, helical spring 5, lower cover cap 6, trip bolt 2.Described body 1, upper cap 3, spacer 4, helical spring 5, lower cover cap 6, trip bolt 2 are linked in sequence from top to bottom; Described body 1, for cylindrical has centre bore, has screw thread at body 1 upper and lower side, for connecting upper lower tubular column; On described body 1, have four symmetrical axial notches, be embedded with a rectangle spacer 4 at each axial notch, the bottom of spacer 4 is fluted for limiting helical spring along himself axis compression; Spacer 4 external surfaces are circular arc, and there is arc-shaped convex middle part, and the upper and lower side of projection is circular arc transition inclined-plane; There is respectively the maximum radial displacement of 3, the 6 restriction spacers 4 of blocking a shot up and down at the upper and lower side of spacer 4, just radially motion in body recess of spacer 4; Block a shot up and down and 3,6 fixed by trip bolt 2.
As another preferred embodiments of the present invention, it comprises body 1, upper cap 3, spacer 4, helical spring 5 and lower cover cap 6, the cylindrical that body 1 is hollow, on described body 1 outer wall, have axial notch 7, be embedded with described spacer 4 at axial notch 7, between described spacer 4 and axial notch 7, be provided with at least three equally distributed described helical springs 5, described upper cap 3 and lower cover cap 6 are fixed on body 1, and upper cap 3 and lower cover cap 6 block respectively described spacer 4.In three helical springs 5, the stiffness factor of the helical spring 5 at both ends is greater than the stiffness factor of the helical spring 5 of pars intermedia.
With reference to Figure of description 1, preferred forms of the present invention is: comprise body 1, upper cap 3, spacer 4, helical spring 5 and lower cover cap 6, the cylindrical that body 1 is hollow, on described body 1 outer wall, have four equally distributed axial notches 7, be embedded with described spacer 4 at axial notch 7, between described spacer 4 and axial notch 7, be provided with four equally distributed described helical springs 5, described upper cap 3 and lower cover cap 6 are fixed on body 1, and upper cap 3 and lower cover cap 6 block respectively described spacer 4.The stiffness factor of middle two springs is consistent, the stiffness factor of the helical spring 5 at both ends is greater than the stiffness factor of the helical spring 5 of pars intermedia, and the stiffness factor of the helical spring 5 of close upper cap 3 those one end is greater than the stiffness factor near the helical spring 5 of lower cover cap 6 those one end.On described spacer 4, be provided with the guide slot 8 that holds described helical spring 5.Described upper cap 3 and lower cover cap 6 are fixed on body 1 through trip bolt 2, upper cap 3 and lower cover cap 6 are close on described body 1, upper cap 3 and lower cover cap 6 have a dip section that extends into axial notch 7, and this dip section is used for blocking described spacer 4.The external surface of described spacer 4 is provided with the projection that is circular arc, protruding upper end near upper cap 3 those one end is ramp 9, protruding lower end near lower cover cap 6 those one end is lower inclined plane 10, and the angle between ramp 9 and spacer 4 surfaces is less than the angle between lower inclined plane 10 and spacer 4 surfaces.
Operating principle is as follows:
Coiled tubing connects new casing collar locator, is lowered in sleeve pipe, then carries coiled tubing on slowly and determines casing coupling position.In the time that spacer 4 projections of new casing collar locator enter casing coupling gap, under the effect of helical spring 5, spacer 4 external diameters can be expanded, projection can snap in casing coupling gap, on now continuing slowly, carry coiled tubing, projection on spacer 4 can be shunk gradually under the effect of the upper power of lifting, thereby cause that coiled tubing well head suspending weight increases, in the time that value added reaches 2 tons of left and right, the projection of spacer 4 will enter in sleeve pipe more than casing coupling, the suspending weight of carrying on now suspending weight recovery meeting is normal, because the bevel angle of protruding upper end is greater than lower end bevel angle, and lower end bevel angle changes comparatively mild, while transferring coiled tubing, suspending weight does not have very significantly and changes.
Claims (7)
1. a coiled tubing new casing collar locator, comprise body (1), upper cap (3), spacer (4), helical spring (5) and lower cover cap (6), the cylindrical that body (1) is hollow, it is characterized in that: on described body (1) outer wall, have axial notch (7), be embedded with described spacer (4) at axial notch (7), between described spacer (4) and axial notch (7), be provided with at least three equally distributed described helical springs (5), described upper cap (3) and lower cover cap (6) are fixed on body (1), and upper cap (3) and lower cover cap (6) block respectively described spacer (4).
2. coiled tubing according to claim 1 new casing collar locator, is characterized in that: in three helical springs (5), the stiffness factor of the helical spring (5) at both ends is greater than the stiffness factor of the helical spring (5) of pars intermedia.
3. coiled tubing according to claim 1 new casing collar locator, it is characterized in that: in three helical springs (5), the stiffness factor of the helical spring (5) of that one end of close upper cap (3) is greater than the stiffness factor near the helical spring (5) of that one end of lower cover cap (6).
4. coiled tubing according to claim 1 new casing collar locator, it is characterized in that: described helical spring (5) is four, the stiffness factor of middle two springs is consistent, the stiffness factor of the helical spring (5) at both ends is greater than the stiffness factor of the helical spring (5) of pars intermedia, and the stiffness factor of the helical spring (5) of that one end of close upper cap (3) is greater than the stiffness factor near the helical spring (5) of that one end of lower cover cap (6).
5. coiled tubing according to claim 1 new casing collar locator, it is characterized in that: described upper cap (3) and lower cover cap (6) are fixed on body (1) through trip bolt (2), upper cap (3) and lower cover cap (6) are close on described body (1), upper cap (3) and lower cover cap (6) have a dip section that extends into axial notch (7), and this dip section is used for blocking described spacer (4).
6. according to the coiled tubing new casing collar locator described in claim 1 or 2 or 3 or 4, it is characterized in that: the external surface of described spacer (4) is provided with the projection that is circular arc, protruding upper end near that one end of upper cap (3) is ramp (9), protruding lower end near that one end of lower cover cap (6) is lower inclined plane (10), and the angle between ramp (9) and spacer (4) surface is less than the angle between lower inclined plane (10) and spacer (4) surface.
7. coiled tubing according to claim 1 new casing collar locator, is characterized in that: the number of described axial notch (7) is along equally distributed four of body (1) outer wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210502372.5A CN103850676B (en) | 2012-11-30 | 2012-11-30 | Novel casing coupling positioner for coiled tubing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210502372.5A CN103850676B (en) | 2012-11-30 | 2012-11-30 | Novel casing coupling positioner for coiled tubing |
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| CN103850676A true CN103850676A (en) | 2014-06-11 |
| CN103850676B CN103850676B (en) | 2017-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210502372.5A Active CN103850676B (en) | 2012-11-30 | 2012-11-30 | Novel casing coupling positioner for coiled tubing |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107120109A (en) * | 2017-06-05 | 2017-09-01 | 中国石油天然气股份有限公司 | A kind of split-type sands-proof check casing collar locator (CCL) |
| CN108005588A (en) * | 2017-11-02 | 2018-05-08 | 中国石油集团渤海钻探工程有限公司 | A kind of rotatable mechanical casing collar locator (CCL) |
| CN110439541A (en) * | 2019-08-21 | 2019-11-12 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | A kind of casing collar locator (CCL) and localization method by friction positioning |
| CN110748336A (en) * | 2019-08-06 | 2020-02-04 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Magnetic signal control electromagnetic force driving mechanical positioner and method |
| RU199692U1 (en) * | 2020-02-21 | 2020-09-15 | Салават Анатольевич Кузяев | Mechanical Coupling Locator |
| CN111663907A (en) * | 2020-06-16 | 2020-09-15 | 大庆市傲阳石油科技开发有限公司 | Heat-preservation type lining underground tubing coupling and installation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107120109A (en) * | 2017-06-05 | 2017-09-01 | 中国石油天然气股份有限公司 | A kind of split-type sands-proof check casing collar locator (CCL) |
| CN108005588A (en) * | 2017-11-02 | 2018-05-08 | 中国石油集团渤海钻探工程有限公司 | A kind of rotatable mechanical casing collar locator (CCL) |
| CN110748336A (en) * | 2019-08-06 | 2020-02-04 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Magnetic signal control electromagnetic force driving mechanical positioner and method |
| CN110748336B (en) * | 2019-08-06 | 2024-01-23 | 中国石油天然气集团有限公司 | Magnetic signal control electromagnetic force driving mechanical positioner and method |
| CN110439541A (en) * | 2019-08-21 | 2019-11-12 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | A kind of casing collar locator (CCL) and localization method by friction positioning |
| CN110439541B (en) * | 2019-08-21 | 2023-11-03 | 中国石油天然气集团有限公司 | Casing coupling positioner and positioning method by means of friction positioning |
| RU199692U1 (en) * | 2020-02-21 | 2020-09-15 | Салават Анатольевич Кузяев | Mechanical Coupling Locator |
| CN111663907A (en) * | 2020-06-16 | 2020-09-15 | 大庆市傲阳石油科技开发有限公司 | Heat-preservation type lining underground tubing coupling and installation method thereof |
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| CN103850676B (en) | 2017-05-10 |
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Effective date of registration: 20200915 Address after: 100007 Beijing, Dongzhimen, North Street, No. 9, No. Co-patentee after: CNPC Chuanqing Drilling Engineering Co.,Ltd. Patentee after: CHINA NATIONAL PETROLEUM Corp. Address before: The 1 section of No. 3 company Chuanqing Drilling Technology Information Office Chenghua District Green Road 610051 Chengdu City, Sichuan Province Patentee before: CNPC Chuanqing Drilling Engineering Co.,Ltd. |
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