CN112253009A - Roller drag reducer for continuous oil pipe - Google Patents
Roller drag reducer for continuous oil pipe Download PDFInfo
- Publication number
- CN112253009A CN112253009A CN202011431816.1A CN202011431816A CN112253009A CN 112253009 A CN112253009 A CN 112253009A CN 202011431816 A CN202011431816 A CN 202011431816A CN 112253009 A CN112253009 A CN 112253009A
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- CN
- China
- Prior art keywords
- coiled tubing
- hole
- connecting boss
- casing
- drag reducer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/20—Flexible or articulated drilling pipes, e.g. flexible or articulated rods, pipes or cables
Abstract
The invention relates to the technical field of horizontal well tools, in particular to a coiled tubing roller drag reducer which comprises a shell, a centering mechanism and a positioning chip, wherein the shell comprises an upper shell and a lower shell which are semicircular, the upper shell and the lower shell are connected together, three centering mechanisms are uniformly distributed on the outer side walls of the upper shell and the lower shell, each centering mechanism comprises a centering block, a mounting groove is formed in each centering block, a plurality of rollers are rotatably mounted in the mounting grooves, a plurality of internally and externally communicated jackscrew holes are formed in the upper shell and the lower shell, jackscrews are screwed in the jackscrew holes, and the positioning chip is arranged at the right end of the upper shell. The invention has reasonable and compact structure and convenient use, changes the sliding resistance reduction of the coiled tubing into the centralizing rolling resistance reduction of the coiled tubing at a plurality of positions of the horizontal section by adopting the rollers, changes the sliding friction into the rolling friction and effectively reduces the friction resistance between the coiled tubing and the inner wall of the casing.
Description
Technical Field
The invention relates to the technical field of horizontal well tools, in particular to a roller drag reducer for a continuous oil pipe.
Background
With continuous development of oil and gas fields, an ultra-long horizontal well becomes a main body technology for development of shale oil and gas, compact oil and gas and low-permeability reserve capacity benefit, and a horizontal well and reservoir yield increasing and improving technology is an effective means for improving single well yield and oil and gas recovery ratio at present. The continuous oil pipe operation can establish an independent circulation channel, operate under pressure and the like, so that the continuous oil pipe technology can provide operations such as well dredging, well washing, perforation, sand washing, hydraulic jet dragging fracturing (acidizing), production profile testing, bridge plug drilling and grinding and the like in unconventional reservoir transformation, and the key for successful implementation of the technology is that the continuous oil pipe can be smoothly lowered to a specified position of a horizontal section. However, the coiled tubing has the characteristics of small size, high flexibility, non-rotation and the like, and the horizontal well has a large bending degree in the underground well bore, so that the sliding friction resistance of the coiled tubing when the coiled tubing is put down in the horizontal well is large, and particularly in an overlong horizontal well of an unconventional reservoir such as shale oil gas and the like, the coiled tubing is easy to bend under the action of injection force and friction resistance, so that the coiled tubing is locked spirally, and the coiled tubing cannot reach a preset depth in a horizontal section due to a self-locking phenomenon, so that the operation depth of the coiled tubing is limited.
In order to enhance the running capability of a coiled tubing in a horizontal well and avoid the problem of premature self-locking under the condition that the size of a well hole, the friction resistance of a shaft, the pressure and the size of a casing are determined, friction reduction and drag reduction technologies such as a lubricant, a metal drag reducer, a hydraulic oscillator and the like are mainly adopted at present. The metal drag reducer and lubricant technology mixes the drag reducer into the working solution of the continuous oil pipe, reduces the friction coefficient between the outer wall of the continuous oil pipe and the inner wall of the sleeve, thereby achieving the drag reduction effect, but the drag reducer increases the treatment difficulty and the treatment cost of the oily wastewater, and the components of the drag reducer are easy to lose efficacy when the friction is carried out at high temperature and heavy load at the bottom of a well; the hydraulic oscillator damping device is installed at the end of the coiled tubing tool string in a threaded connection mode, negative pressure pulses are generated to activate the coiled tubing and reduce friction resistance, effective working time of the hydraulic oscillator damping device is limited, and solid-phase particles in working fluid can block the tool to cause work failure. The friction reducing and drag reducing technology is mainly used for operations such as sand washing and blockage removing of the coiled tubing, drilling and grinding of bridge plugs and the like, limits implementation of processes such as dragging and fracturing of the bottom seal of the coiled tubing, has limited extension capacity, and is difficult to meet the operation requirements of the coiled tubing in an ultra-long horizontal well.
Disclosure of Invention
The invention provides a coiled tubing roller drag reducer, overcomes the defects of the prior art, and can effectively solve the problem that the coiled tubing is self-locked due to the fact that the coiled tubing is easy to buckle because of large friction resistance when the coiled tubing is put in the existing long horizontal well.
The technical scheme of the invention is realized by the following measures: the utility model provides a coiled tubing gyro wheel resistance reducing device, includes the casing, rights mechanism and location chip, the casing is including dismantling fixed connection and be in the same place and form coiled tubing and place last casing and lower casing of passageway, goes up all along circumference interval equipartition on the lateral wall of casing and lower casing and has three right mechanism, right mechanism and include the piece of righting of fixed mounting on the casing lateral wall, right and be equipped with the mounting groove that the opening is outwards on the piece, the mounting groove internal rotation is installed the projection of a plurality of the central axis on the horizontal plane and is forward and backward and protrusion in mounting groove's gyro wheel, corresponds every adjacent two and right the last casing of position between the piece and all be equipped with a plurality of inside and outside a jackscrew hole that link up on the casing down, the threaded connection has the jackscrew in the jackscrew hole, goes up the casing.
The following is further optimization or/and improvement of the technical scheme of the invention:
the left and right ends of the rear bottom end of the upper shell can be respectively provided with a first connecting boss, the first connecting boss is provided with a first pin hole which is communicated with the left and right, a second connecting boss is arranged on the top end of the rear part of the lower shell corresponding to the position between the two first connecting bosses, the second connecting boss corresponding to the first pin hole is provided with a second pin hole, the first connecting boss and the second connecting boss are detachably and fixedly connected together through a first pin shaft penetrating through the first pin hole and the second pin hole, the left end and the right end of the top end of the front part of the lower shell are respectively provided with a third connecting boss, the third connecting boss is provided with a third pin hole which is communicated with the left end and the right end, a fourth connecting boss is arranged at the bottom end of the front part of the upper shell corresponding to the position between the two third connecting bosses, and a fourth pin hole is formed in the fourth connecting boss corresponding to the third pin hole, and the third connecting boss and the fourth connecting boss are detachably and fixedly connected together through a second pin shaft penetrating through the third pin hole and the fourth pin hole.
The roller can be waist drum-shaped, a through hole is formed in the middle of the roller, a threaded hole is formed in one side wall of the groove corresponding to the through hole, a pin shaft mounting hole is formed in the other side wall of the groove corresponding to the through hole, and the roller is rotatably mounted in the mounting groove through a threaded pin shaft which sequentially penetrates through the pin shaft mounting hole and the through hole and is in threaded connection with the threaded hole.
The right end of the upper shell can be provided with a chip mounting counter bore, the positioning chip is located in the chip mounting counter bore, the inner wall of the chip mounting counter bore is connected with a sealing cover in a threaded mode, and a sealing ring is arranged between the lower end of the sealing cover and the inner wall of the mounting counter bore.
The left end and the right end of the righting block can be in a streamline structure.
The invention has reasonable and compact structure and convenient use, adopts the roller to reduce the sliding resistance of the coiled tubing in the horizontal well so as to realize the centralizing rolling resistance reduction of the coiled tubing at a plurality of positions in the horizontal well and change the sliding friction into the rolling friction, effectively reduces the friction resistance between the coiled tubing and the inner wall of the casing, is convenient for the coiled tubing to smoothly fall to a preset well depth position, improves the operation capability of the coiled tubing in a long horizontal well, and is convenient for prompting an operator to timely detach the coiled tubing from the coiled tubing when the coiled tubing is lifted out of the well mouth by arranging the positioning chip so as to prevent other equipment from being touched.
Drawings
FIG. 1 is a schematic view of the present invention in partial cross-section.
FIG. 2 is a schematic cross-sectional view at A-A in FIG. 1.
Fig. 3 is an enlarged schematic view of B in fig. 1.
The codes in the figures are respectively: the sealing device comprises an upper shell 1, a lower shell 2, a centering block 3, a mounting groove 4, a roller 5, a threaded pin shaft 6, a jackscrew 7, a sealing cover 8, a positioning chip 9, a fourth connecting boss 10, a third connecting boss 11, a second connecting boss 12, a first pin shaft 14, a second pin shaft 15 and a sealing ring 16.
Detailed Description
The present invention is not limited by the following examples, and specific embodiments may be determined according to the technical solutions and practical situations of the present invention.
In the present invention, for convenience of description, the description of the relative positional relationship of the components is described according to the layout pattern of fig. 1 of the specification, such as: the positional relationship of front, rear, upper, lower, left, right, etc. is determined in accordance with the layout direction of the drawings of the specification.
The invention is further described with reference to the following examples and figures:
as shown in fig. 1, 2 and 3, the coiled tubing roller choke comprises a shell, a righting mechanism and a positioning chip 9, the shell comprises an upper shell 1 and a lower shell 2 which are detachably and fixedly connected together and form a coiled tubing placing channel, three righting mechanisms are uniformly distributed on the outer side walls of the upper shell 1 and the lower shell 2 at intervals along the circumferential direction, the righting mechanism comprises a righting block 3 fixedly arranged on the outer side wall of the shell, a mounting groove 4 with an outward opening is arranged on the righting block 3, a plurality of rollers 5 which are provided with central axes with projection on the horizontal plane in the front-back direction and protrude out of the mounting groove are rotatably arranged in the mounting groove 4, a plurality of internal and external through jackscrew holes are formed in the upper shell 1 and the lower shell 2 corresponding to the positions between every two adjacent righting blocks 3, jackscrews 7 are screwed in the jackscrew holes, and a positioning chip 9 is arranged at the right end of the upper shell 1.
According to the requirement, the positioning chip 9 can adopt a DW100 model, and 3 rollers can be arranged in each mounting groove 4; when the coiled tubing is used, the upper shell 1 and the lower shell 2 are firstly disassembled, the lower shell 2 is sleeved outside the coiled tubing, then the upper shell 1 is buckled on the lower shell 2 and fixedly connected, the upper shell 1 and the lower shell 2 are fixed on the coiled tubing through the jackscrews 7, a plurality of coiled tubing is arranged on the coiled tubing at intervals according to the field requirement, then the coiled tubing is put into a horizontal well, and the coiled tubing is uniformly in rolling friction with the inner wall of a sleeve pipe in the horizontal well through the rollers 5 of the centering mechanism, so that the friction resistance of the coiled tubing when the coiled tubing is put into the long horizontal well is reduced; when the coiled tubing is lifted up and the wellhead is lifted up from the coiled tubing roller drag reducer, the positioning chip 9 can send a position signal to the sound and light alarm device in the control room, so that when the coiled tubing blowout preventer set reaches a coiled tubing operation window, an operator can timely close the coiled tubing blowout preventer set and timely detach the coiled tubing blowout preventer set from the coiled tubing. The invention has reasonable and compact structure and convenient use, adopts the roller 5 to reduce the sliding resistance of the coiled tubing in the horizontal well so as to realize the centralizing rolling resistance reduction of the coiled tubing at a plurality of positions in the horizontal well and change the sliding friction into the rolling friction, effectively reduces the friction resistance between the coiled tubing and the inner wall of the casing, is convenient for the coiled tubing to smoothly fall to a preset well depth position, improves the operation capability of the coiled tubing in a long horizontal well, and is convenient for prompting an operator to timely detach the coiled tubing from the coiled tubing when the coiled tubing is lifted out of a well head by arranging the positioning chip 9 so as to prevent other equipment from being touched.
The coiled tubing roller drag reducer can be further optimized or/and improved according to actual needs:
as shown in the attached figures 1, 2 and 3, the left and right ends of the rear bottom end of the upper shell 1 are respectively provided with a first connecting boss, the first connecting boss is provided with a first pin hole which is communicated from left to right, the top end of the rear part of the lower shell 2 corresponding to the position between the two first connecting bosses is provided with a second connecting boss 12, the second connecting boss 12 corresponding to the position of the first pin hole is provided with a second pin hole, the first connecting boss and the second connecting boss 12 are detachably and fixedly connected together through a first pin shaft 14 which is arranged in the first pin hole and the second pin hole, the left and right ends of the front top end of the lower shell 1 are respectively provided with a third connecting boss 11, the third connecting boss 11 is provided with a third pin hole which is communicated from left to right, the bottom end of the front part of the upper shell corresponding to the position between the two third connecting bosses 11 is provided with a fourth connecting boss 10, the fourth connecting boss 10 corresponding, the third connecting boss 11 and the fourth connecting boss 10 are detachably and fixedly connected together through a second pin shaft 15 penetrating through the third pin hole and the fourth pin hole. According to the needs, second pinhole and third pinhole are the screw hole, and first round pin axle 14 and second round pin axle 15 are the screw thread round pin axle, and first round pin axle 14 passes first pinhole and spiro union in the second pinhole, and second round pin axle 15 passes fourth pinhole and spiro union in the third pinhole, can dismantle fixed connection together with casing 2 down with going up casing 1 fast through first round pin axle 14 and second round pin axle 15, have saved installation time.
As shown in fig. 1 and 2, the roller 5 is waist drum shaped, a through hole is provided in the middle of the roller 5, a threaded hole is provided on one side wall of the groove corresponding to the through hole, a pin shaft mounting hole is provided on the other side wall of the groove corresponding to the through hole, and the roller 5 is rotatably mounted in the mounting groove 4 by a threaded pin shaft which sequentially passes through the pin shaft mounting hole and the through hole and is screwed into the threaded hole. According to the requirement, the radius of the curved surface of the roller 5 is equal to the radius of the inner wall of the horizontal well pipeline, and the radius of the curved surface of the roller 5 is equal to the radius of the inner wall of the horizontal well pipeline by arranging the waist drum-shaped roller 5, so that the passing capacity of the pipe joint hoop is enhanced.
As shown in fig. 3, a chip mounting counter bore is formed in the right end of the upper housing 1, the positioning chip 9 is located in the chip mounting counter bore, a sealing cover 8 is connected to the inner wall of the chip mounting counter bore in a threaded manner, and a sealing ring 16 is arranged between the lower end of the sealing cover 8 and the inner wall of the mounting counter bore. The sealing cover 8 and the sealing ring 16 are arranged to prevent liquid in a well from entering the counter bore of the chip mounting to damage the positioning chip 9.
As shown in the attached figure 1, the left end and the right end of the righting block 3 are in streamline structures. The two ends of the centralizing block 3 are designed to be in a streamline structure, so that the passing capacity of the casing joint hoop is enhanced.
The above technical features constitute the best embodiment of the present invention, which has strong adaptability and best implementation effect, and unnecessary technical features can be increased or decreased according to actual needs to meet the requirements of different situations.
Claims (8)
1. The utility model provides a coiled tubing gyro wheel resistance reducing device, its characterized in that includes the casing, rights mechanism and location chip, the casing is including dismantling fixed connection and be in the same place and form coiled tubing and place last casing and lower casing of passageway, goes up all along circumference interval equipartition on the lateral wall of casing and lower casing and has three right mechanism, right mechanism includes the piece of righting of fixed mounting on the casing lateral wall, rights and is equipped with the mounting groove that the opening is outwards on the piece, and the projection of a plurality of the central axis on the horizontal plane is installed to the mounting groove internal rotation to and protrusion in mounting groove's gyro wheel, corresponds and all be equipped with the inside and outside jackscrew hole that link up of a plurality of on the last casing of position between every two adjacent right blocks and the lower casing, and the spiro union has the jackscrew in the jackscrew hole, and it is equipped with.
2. The coiled tubing roller drag reducer according to claim 1, wherein the upper casing has a first connecting boss at each of left and right ends of the rear bottom end, the first connecting boss has a first pin hole extending therethrough from left to right, the lower casing has a second connecting boss at the top end of the rear portion corresponding to a position between the two first connecting bosses, the second connecting boss corresponding to the position of the first pin hole has a second pin hole, the first connecting boss and the second connecting boss are detachably and fixedly connected to each other by a first pin shaft inserted through the first pin hole and the second pin hole, the lower casing has a third connecting boss at each of left and right ends of the front top end, the third connecting boss has a third pin hole extending therethrough from left to right, the upper casing has a fourth connecting boss at the bottom end corresponding to a position between the two third connecting bosses, the fourth connecting boss corresponding to the third pin hole has a fourth pin hole, the third connecting boss and the fourth connecting boss are detachably and fixedly connected together through a second pin shaft penetrating through the third pin hole and the fourth pin hole.
3. The coiled tubing roller drag reducer according to claim 1 or 2, wherein the roller is drum-shaped, a through hole is formed in the middle of the roller, a threaded hole is formed in one side wall of the groove corresponding to the through hole, a pin shaft mounting hole is formed in the other side wall of the groove corresponding to the through hole, and the roller is rotatably mounted in the mounting groove by a threaded pin shaft which passes through the pin shaft mounting hole and the through hole in sequence and is screwed into the threaded hole.
4. The coiled tubing roller drag reducer according to claim 1 or 2, wherein the right end of the upper housing is provided with a chip mounting counterbore, the positioning chip is positioned in the chip mounting counterbore, the inner wall of the chip mounting counterbore is in threaded connection with a sealing cover, and a sealing ring is arranged between the lower end of the sealing cover and the inner wall of the mounting counterbore.
5. The coiled tubing roller drag reducer according to claim 3, wherein the right end of the upper housing is provided with a chip mounting counterbore, the positioning chip is positioned in the chip mounting counterbore, the inner wall of the chip mounting counterbore is in threaded connection with a sealing cover, and a sealing ring is arranged between the lower end of the sealing cover and the inner wall of the mounting counterbore.
6. The coiled tubing roller drag reducer of claim 1, 2 or 5, wherein the left and right ends of the centralizer block are both in a streamlined configuration.
7. The coiled tubing roller drag reducer of claim 3, wherein the right and left ends of the centralizer block are each in a streamlined configuration.
8. The coiled tubing roller drag reducer of claim 4, wherein the right and left ends of the centralizer block are each in a streamlined configuration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011431816.1A CN112253009A (en) | 2020-12-09 | 2020-12-09 | Roller drag reducer for continuous oil pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011431816.1A CN112253009A (en) | 2020-12-09 | 2020-12-09 | Roller drag reducer for continuous oil pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112253009A true CN112253009A (en) | 2021-01-22 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011431816.1A Pending CN112253009A (en) | 2020-12-09 | 2020-12-09 | Roller drag reducer for continuous oil pipe |
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| Country | Link |
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| CN (1) | CN112253009A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114135236A (en) * | 2021-12-08 | 2022-03-04 | 西安石油大学 | Coiled tubing conveying resistance reducing device and using method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201024926Y (en) * | 2007-04-28 | 2008-02-20 | 北京奥格特技术有限公司 | Trolley spiral bushing centralizer |
| CN201367868Y (en) * | 2009-02-11 | 2009-12-23 | 中国石油集团川庆钻探工程有限公司井下作业公司 | Coiled-tubing idler wheel centralizing guider for horizontal well |
| CN103775005A (en) * | 2014-01-14 | 2014-05-07 | 河南理工大学 | Sucker rod anti-eccentric grinding device for coal-bed gas well |
| US20160215574A1 (en) * | 2014-07-16 | 2016-07-28 | Daqing First Technology Development Limited Company | A downhole-started self-locking casing centralizer |
| CN207296908U (en) * | 2018-01-17 | 2018-05-01 | 大庆市晟威机械制造有限公司 | A kind of proof-wear sucker rod centralising device suitable for light crude oil |
| CN210183559U (en) * | 2019-08-06 | 2020-03-24 | 深圳市源茂升科技有限公司 | Personnel positioning device |
-
2020
- 2020-12-09 CN CN202011431816.1A patent/CN112253009A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201024926Y (en) * | 2007-04-28 | 2008-02-20 | 北京奥格特技术有限公司 | Trolley spiral bushing centralizer |
| CN201367868Y (en) * | 2009-02-11 | 2009-12-23 | 中国石油集团川庆钻探工程有限公司井下作业公司 | Coiled-tubing idler wheel centralizing guider for horizontal well |
| CN103775005A (en) * | 2014-01-14 | 2014-05-07 | 河南理工大学 | Sucker rod anti-eccentric grinding device for coal-bed gas well |
| US20160215574A1 (en) * | 2014-07-16 | 2016-07-28 | Daqing First Technology Development Limited Company | A downhole-started self-locking casing centralizer |
| CN207296908U (en) * | 2018-01-17 | 2018-05-01 | 大庆市晟威机械制造有限公司 | A kind of proof-wear sucker rod centralising device suitable for light crude oil |
| CN210183559U (en) * | 2019-08-06 | 2020-03-24 | 深圳市源茂升科技有限公司 | Personnel positioning device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114135236A (en) * | 2021-12-08 | 2022-03-04 | 西安石油大学 | Coiled tubing conveying resistance reducing device and using method |
| CN114135236B (en) * | 2021-12-08 | 2023-09-26 | 西安石油大学 | Coiled tubing conveying drag reduction device and use method |
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Application publication date: 20210122 |
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| RJ01 | Rejection of invention patent application after publication |