CN111911103B - Hydraulic booster and use method thereof - Google Patents
Hydraulic booster and use method thereof Download PDFInfo
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- CN111911103B CN111911103B CN202010801458.2A CN202010801458A CN111911103B CN 111911103 B CN111911103 B CN 111911103B CN 202010801458 A CN202010801458 A CN 202010801458A CN 111911103 B CN111911103 B CN 111911103B
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- sliding sleeve
- mandrel body
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- outer cylinder
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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
- E21B29/00—Cutting or destroying pipes, packers, plugs, or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
Abstract
The invention belongs to the technical field of well drilling and completion, and particularly relates to a hydraulic booster. The hydraulic booster comprises a mandrel body, a piston, a sliding sleeve, an outer cylinder and a lower joint which are sequentially connected, wherein the mandrel body, the sliding sleeve, the outer cylinder and the middle part of the lower joint form a through central flow passage, the piston is connected with a third section of the mandrel body through threads, and the sliding sleeve is matched with a slide way arranged on a second section of the mandrel body. Under the hydraulic action in the oil pipe, the lower joint moves downwards to drive the outer cylinder and the sliding sleeve to reach the bottom dead center, the drilling pressure is lowered, and the hydraulic pressurization process is completed. The invention has simple structure and convenient use, and can be widely used for pressurizing the grinding shoes for horizontal well drilling and bridge plug grinding operation.
Description
Technical Field
The invention belongs to the technical field of well drilling and completion, and particularly relates to a hydraulic booster and a use method thereof.
Background
In the process of oil-gas well operation, in order to correctly evaluate and know a target layer, when a multi-layer stratum is encountered, layering test, fracturing, acidification, multi-layer well completion, temporary plugging and other measures are needed, a plugging tool bridge plug is needed, and the bridge plug in the well needs to be drilled one by one in the later stage of process implementation so as to restore smoothness of a well shaft and facilitate subsequent operation. The horizontal well drilling and grinding bridge plug technology is an indispensable matching technology for the horizontal well staged multi-cluster fracturing technology, and is continuously applied to low-permeability compact oil development.
At present, ground equipment such as a power tap, a turntable and the like cannot be used for providing power for the drilling and grinding bridge plug operation of a horizontal well so as to prevent an inner tubular column of the well from being driven to integrally rotate, and a casing is damaged in an inclined well section and a horizontal section, so that the bridge plug drilling and grinding is generally carried out by adopting an oil pipe conveying screw drill, and the longitudinal vibration of a drill stem is caused by the discontinuity of the drill feeding and the interaction of grinding shoes and the bridge plug in the drilling and grinding construction process of the horizontal well, so that the drilling pressure is unstable and is not easy to control, thereby reducing the drilling and plugging efficiency and the service life of a downhole tool; if the construction is performed on a long horizontal section of the horizontal well, the friction resistance of the operation pipe column is increased, and when the friction resistance is severe, the weight of the operation pipe column cannot be effectively applied to the grinding shoes, so that the operation efficiency of drilling and grinding bridge plugs is low, and the construction period is prolonged.
Disclosure of Invention
Aiming at the problems, the invention aims to provide a hydraulic booster and a use method thereof, which can provide stable bit pressure for grinding shoes in the horizontal well drilling and grinding construction, prevent the premature damage of downhole tools and improve the drilling and grinding bridge plug operation efficiency.
The technical scheme of the invention is as follows:
the hydraulic booster comprises a mandrel body, a piston, a sliding sleeve, an outer cylinder and a lower joint which are sequentially connected, wherein the mandrel body, the sliding sleeve, the outer cylinder and the middle part of the lower joint form a through central flow passage; the mandrel body is divided into three sections which are sequentially connected from top to bottom, wherein the outer diameter of the third section is smaller than the outer diameter of the second section and smaller than the outer diameter of the first section, the outer diameter of the second section of the mandrel body is smaller than the inner diameter of the outer barrel, and a slide way is arranged on the second section of the mandrel body; the piston is positioned at the lower end of the mandrel body and is connected with the third section of the mandrel body through threads, and the outer diameter of the piston is larger than the outer diameter of the second section of the mandrel body; the sliding sleeve is matched with a slide way arranged on the second section of the mandrel body; the upper part of the outer cylinder is connected with the lower part of the sliding sleeve through threads, and the lower part of the outer cylinder is connected with the lower joint through threads.
A packing groove is formed in the third section of the mandrel body, and the third section of the mandrel body and the piston are sealed through a sealing packing in the packing groove; the outer diameter of the piston is the same as the inner diameter of the outer cylinder, and the lower part of the outer cylinder and an upper O-shaped rubber ring in an O-shaped rubber ring groove at the lower part of the piston form sliding seal; the lower part of the outer cylinder is sealed with the upper part of the lower joint through a lower O-shaped rubber ring.
The sliding sleeve is a hexagonal sleeve, an inner hexagonal hole is formed in the sliding sleeve, the second section of the sliding way of the mandrel body is a hexagonal body, and the inner hexagonal hole is matched with the hexagonal body.
The side wall of the upper part of the outer cylinder, which is close to the lower part of the sliding sleeve, is provided with a liquid discharge hole.
The outer diameter of the first section of the mandrel body is the same as the outer diameter of the sliding and the outer diameter of the outer cylinder.
The first section of the mandrel body is provided with an oil pipe box.
The application method of the hydraulic booster uses any hydraulic booster as described above, and the specific process is as follows:
step one: connecting a hydraulic booster with a downhole working string through an oil pipe box and a lower joint, starting a pump and lowering the string when drilling and grinding are started, when the lower part of a grinding shoe is positioned at a position away from the upper part of a first bridge plug, the weight of a weight indicator is the weight of a drill string in circulating liquid, a sliding sleeve of the hydraulic booster is attached to the lower part of a first section of a mandrel body, the outer barrel is positioned at a drilling pressure stroke starting point, and the outer barrel stroke is in a fully closed state;
step two: during normal drilling and grinding operation, slowly lowering the drill string to enable the grinding shoes to contact the first bridge plug, reducing the weight of the weight indicator in suspension, wherein the reduced value is the weight on bit, and recording the weight on bit and the pump pressure value at the moment;
step three: the suspension weight is kept unchanged, the hydraulic booster is driven by the lower joint to move downwards continuously under the hydraulic action in the oil pipe along with the drilling of the grinding shoe, the outer barrel and the sliding sleeve are driven to reach the bottom dead center, at the moment, the lower end of the sliding sleeve is attached to the upper end of the piston, the drilling pressure is lowered, the hydraulic pressurization process is completed, and at the moment, the drilling is fed timely. The drill feeding distance is the extending length of the outer cylinder, and the first stroke of drilling and grinding is completed;
step four: and repeating the second step and the third step to complete the hydraulic pressurizing process until the drilling and grinding are finished.
Along with the continuous drilling of the grinding shoes, the pipe is continuously stretched, when the weight of the weight indicator is reduced to be smaller than the required weight value or no weight is hung, the weight of the weight indicator cannot be applied to the grinding shoes by the weight of the pipe column, the pump pressure value recorded in the second step is kept unchanged according to the pump pressure value, the grinding shoes are continuously drilled, the third step is repeated, the hydraulic booster is under the hydraulic action in the oil pipe, the lower joint continuously moves downwards to drive the outer barrel and the sliding sleeve to reach the bottom dead center, at the moment, the lower end of the sliding sleeve is attached to the upper end of the piston, the weight of the weight indicator is reduced, the hydraulic pressurizing process is completed, at the moment, the drill is timely conveyed, and the drill conveying distance is the extending length of the outer barrel.
The invention has the technical effects that:
1. the hydraulic booster converts the downward motion of the sliding sleeve, the outer cylinder and the lower joint in the oil pipe into the drilling pressure, and the hydraulic pressurization ensures that the drilling pressure is stable, solves the problem that the long horizontal section horizontal well can not effectively apply the drilling pressure to the grinding shoes by depending on the self weight of the pipe column, is beneficial to improving the bridge plug operation efficiency. 2. A hydraulic booster is composed of slide sleeve, external cylinder, lower joint, piston and hydraulic booster.
The following will make further description with reference to the accompanying drawings
Drawings
FIG. 1 is a schematic diagram of a hydraulic booster of the present invention.
FIG. 2 is a schematic diagram of the spindle body structure of the hydraulic power booster of the present invention.
Reference numerals: the device comprises a 1-core shaft body, a 2-sliding sleeve, a 3-outer cylinder, a 4-piston, a 5-sealing packing, a 6-upper O-shaped rubber ring, a 7-lower O-shaped rubber ring, an 8-lower joint, a 9-oil pipe box, a 10-slideway, 11-threads, a 12-packing groove, a 13-central runner, a 17-O-shaped rubber ring groove and 18-drain holes.
Detailed Description
Example 1
In order to overcome the problems that in the drilling and grinding construction process of a horizontal well, the drill pressure is unstable due to the discontinuity of drill feeding and the longitudinal vibration of a drill string caused by the interaction of grinding shoes and bridge plugs, and the drill pressure cannot be effectively applied to the grinding shoes by the weight of a pipe column in the construction of a long horizontal section of the horizontal well, so that the operation efficiency of drilling and grinding bridge plugs is low, the invention provides the hydraulic booster shown in the figure 1 and the application method thereof, and the hydraulic booster converts the downward movement of a sliding sleeve, an outer barrel and a lower joint in an oil pipe into the drill pressure by converting the hydraulic action into the drill pressure, so that the drill pressure is stable, the problem that the drill pressure cannot be effectively applied to the grinding shoes by the weight of the pipe column in the horizontal well in the long horizontal section is solved, and the improvement of the operation efficiency of the grinding bridge plugs is facilitated; the sliding sleeve, the outer cylinder and the lower joint apply constant weight on bit through reciprocating motion, can be automatically adjusted according to the fluctuation of the weight on bit, can effectively absorb longitudinal vibration of the tubular column, is beneficial to protecting the tubular column, and prolongs the service life of a downhole tool.
The hydraulic booster comprises a mandrel body 1, a piston 4, a sliding sleeve 2, an outer cylinder 3 and a lower joint 8 which are sequentially connected, wherein the central runner 13 penetrating through the central parts of the mandrel body 1, the sliding sleeve 2, the outer cylinder 3 and the lower joint 8 is formed;
the mandrel body 1 is divided into three sections which are sequentially connected from top to bottom, wherein the outer diameter of the third section is smaller than the outer diameter of the second section and smaller than the outer diameter of the first section, the outer diameter of the second section of the mandrel body 1 is smaller than the inner diameter of the outer barrel 3, and a slide way 10 is arranged on the second section of the mandrel body 1;
the piston 4 is located at the lower end of the mandrel body 1 and is connected with the third section of the mandrel body 1 through threads, and the outer diameter of the piston 4 is larger than the outer diameter of the second section of the mandrel body 1.
The sliding sleeve 2 is matched with a slide way 10 arranged on the second section of the mandrel body 1.
The upper part of the outer cylinder 3 is connected with the lower part of the sliding sleeve 2 through threads, and the lower part of the outer cylinder 3 is connected with the lower joint 8 through threads.
As shown in figure 1, the invention moves downwards under the action of the pressure difference in the oil pipe by the cooperation of the sliding sleeve 2, the outer cylinder 3 and the lower joint 8, thereby providing constant weight on bit for the lower grinding shoe; the sliding sleeve 2, the outer barrel 3 and the lower joint 8 can automatically adjust the reciprocating speed according to the fluctuation of the drilling pressure, can effectively absorb the longitudinal vibration of the tubular column, are beneficial to protecting the tubular column, and improve the service life of the downhole tool.
Example 2
On the basis of embodiment 1, in this embodiment, as shown in fig. 1 and 2, preferably, a packing groove 12 is provided on the third section of the mandrel body 1, and the third section of the mandrel body 1 and the piston 4 are sealed by a sealing packing 5 in the packing groove 12; preferably, the outer diameter of the piston 4 is the same as the inner diameter of the outer cylinder 3, and the lower part of the outer cylinder 3 forms sliding seal with an upper O-shaped rubber ring 6 in an O-shaped rubber ring groove 17 at the lower part of the piston 4; preferably, the lower part of the outer cylinder 3 and the upper part of the lower joint 8 are sealed by a lower O-shaped rubber ring 7.
As shown in figure 1, the sealing packing 5, the upper O-shaped rubber ring 6 and the lower O-shaped rubber ring 7 form a seal, so that liquid in the central flow passage 13 can be effectively prevented from flowing out of the tube from the piston 4 and the outer tube 3 of the hydraulic booster, the working stability of the hydraulic booster is improved, and the service life is prolonged.
Example 3
On the basis of embodiment 2, in this embodiment, preferably, the sliding sleeve 2 is a hexagonal sleeve, an inner hexagonal hole is formed in the sliding sleeve, the second section of the slide way 10 of the mandrel body 1 is a hexagonal body, and the inner hexagonal hole of the hexagonal sleeve is matched with the hexagonal body.
As shown in fig. 2, the hexagonal sleeve is matched with the mandrel body, the structure prevents the hexagonal sleeve outer cylinder 3, the lower joint 8 and the mandrel body 1 from rotating, and the upper torque of the hydraulic booster can be transmitted to the lower tool to provide rotary power for the grinding shoes.
Example 4
In the embodiment 3, preferably, the upper part of the outer cylinder 3 is provided with a drain hole 18 near the lower part of the sliding sleeve 2.
Preferably, the outer diameter of the first section of the mandrel body 1 is the same as the outer diameter of the sliding sleeve 2 and the outer diameter of the outer cylinder 3.
As shown in fig. 1, the core shaft body 1, the piston 4, the sliding sleeve 2 and the outer cylinder 3 form a sliding space, and the discharge hole 8 can effectively discharge the liquid in the cavity, so that the sliding sleeve 2, the outer cylinder 3 and the lower joint 8 can reciprocate rapidly. The outer diameter of the first section of the mandrel body 1 is the same as the outer diameter of the sliding sleeve 2 and the outer diameter of the outer cylinder 3, so that the outer surface of the hydraulic power hydraulic booster is smooth, and blocking is prevented in the process of tripping a tubular column.
Preferably, the first section of the mandrel body 1 is provided with an oil pipe box 9, and the hydraulic booster can be conveniently connected to a working string without using a special adapter because of using a conventional thread buckle.
Example 5
Based on the embodiment 4, a hydraulic booster is specifically pressurized as follows:
step one: connecting a hydraulic booster with a downhole working string through an oil pipe box 9 and a lower joint 8, starting a pump and lowering the string when drilling and grinding are started, when the lower part of a grinding shoe is positioned at a position away from the upper part of a first bridge plug, the weight of a weight meter suspension is the weight of the drill string in circulating liquid, a sliding sleeve 2 of the hydraulic booster is attached to the lower part of a first section of a mandrel body 1, an outer barrel 3 is positioned at the starting point of a drilling and pressing stroke, and the stroke of the outer barrel 3 is in a fully closed state;
step two: during normal drilling and grinding operation, slowly lowering the drill string to enable the grinding shoes to contact the first bridge plug, reducing the weight of the weight indicator in suspension, wherein the reduced value is the weight on bit, and recording the weight on bit and the pump pressure value at the moment;
step three: the suspension weight is kept unchanged, the hydraulic booster is driven by the lower joint 8 to continuously move downwards under the hydraulic action in the oil pipe to drive the outer cylinder 3 and the sliding sleeve 2 to reach the bottom dead center along with the drilling of the grinding shoe, at the moment, the lower end of the sliding sleeve 2 is attached to the upper end of the piston 4, the drilling pressure is reduced, the hydraulic pressurization process is completed, and at the moment, the drill is fed timely. The drill feeding distance is the extending length of the outer cylinder 3, and the first stroke of drilling and grinding is completed;
step four: and repeating the second step and the third step to complete the hydraulic pressurizing process until the drilling and grinding are finished.
Along with the continuous drilling of the grinding shoes, the pipe is continuously stretched, when the weight of the weight indicator is reduced to be smaller than the required weight value or no weight is hung, the weight of the weight indicator cannot be used for applying the weight to the grinding shoes by the weight of the pipe column, the pump pressure value recorded in the second step is kept unchanged according to the pump pressure value, the grinding shoes are continuously drilled, the third step is repeated, the hydraulic booster is under the hydraulic action in the oil pipe, the lower joint 8 continuously moves downwards to drive the outer cylinder 3 and the sliding sleeve 2 to reach the bottom dead center, at the moment, the lower end of the sliding sleeve 2 is attached to the upper end of the piston 4, the weight of the weight indicator is reduced, the hydraulic pressurizing process is completed, at the moment, the drill is timely delivered, and the drill delivering distance is the extension length of the outer cylinder 3.
The invention is driven by hydraulic pressure in the pipe, has simple structure and convenient use, and can be widely used for pressurizing the grinding shoes for horizontal well drilling and bridge plug grinding operation.
The present invention is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present invention are intended to be included in the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims. The components and structures not specifically described in this embodiment are well known in the art and are not described in detail herein.
Claims (9)
1. The application method of the hydraulic booster is characterized by comprising the following steps of: the hydraulic booster comprises a mandrel body (1), a piston (4), a sliding sleeve (2), an outer cylinder (3) and a lower joint (8) which are sequentially connected, wherein the central runner (13) is formed in the middle of the mandrel body (1), the sliding sleeve (2), the outer cylinder (3) and the lower joint (8) in a penetrating manner; the mandrel body (1) is divided into three sections which are sequentially connected from top to bottom, wherein the outer diameter of the third section is smaller than the outer diameter of the second section and smaller than the outer diameter of the first section, the outer diameter of the second section of the mandrel body (1) is smaller than the inner diameter of the outer barrel (3), and a slide way (10) is arranged on the second section of the mandrel body (1); the piston (4) is positioned at the lower end of the mandrel body (1) and is connected with the third section of the mandrel body (1) through threads, and the outer diameter of the piston (4) is larger than the outer diameter of the second section of the mandrel body (1); the sliding sleeve (2) is matched with a slide way (10) arranged on the second section of the mandrel body (1); the upper part of the outer cylinder (3) is connected with the lower part of the sliding sleeve (2) through threads, and the lower part of the outer cylinder (3) is connected with the lower joint (8) through threads; the method specifically comprises the following steps:
step one: connecting a hydraulic booster with a downhole working string through an oil pipe box (9) and a lower joint (8), starting a pump and lowering the string when drilling and grinding are started, when the lower part of a grinding shoe is positioned at the upper part of a first bridge plug, the weight of a weight indicator suspension is the weight of the drill string in circulating liquid, a sliding sleeve (2) of the hydraulic booster is attached to the lower part of a first section of a mandrel body (1), an outer barrel (3) is positioned at the starting point of a drilling and pressing stroke, and the stroke of the outer barrel (3) is in a fully closed state;
step two: during normal drilling and grinding operation, slowly lowering the drill string to enable the grinding shoes to contact the first bridge plug, reducing the weight of the weight indicator in suspension, wherein the reduced value is the weight on bit, and recording the weight on bit and the pump pressure value at the moment;
step three: the suspension weight is kept unchanged, the hydraulic booster is driven by the lower joint (8) to continuously move downwards under the hydraulic action in the oil pipe to drive the outer cylinder (3) and the sliding sleeve (2) to reach the bottom dead center along with the drilling of the grinding shoe, at the moment, the lower end of the sliding sleeve (2) is attached to the upper end of the piston (4), the drilling pressure is reduced, the hydraulic pressurization process is completed, and at the moment, the drilling is fed timely; the drill feeding distance is the extending length of the outer cylinder (3), and the first stroke of drilling and grinding is completed;
step four: and repeating the second step and the third step to complete the hydraulic pressurizing process until the drilling and grinding are finished.
2. The method of using a hydraulic booster according to claim 1, wherein: the third section of the mandrel body (1) is provided with a packing groove (12), and the third section of the mandrel body (1) and the piston (4) are sealed through a sealing packing (5) in the packing groove (12).
3. The method of using a hydraulic booster according to claim 1, wherein: the outer diameter of the piston (4) is the same as the inner diameter of the outer cylinder (3), and the lower part of the outer cylinder (3) and an upper O-shaped rubber ring (6) in an O-shaped rubber ring groove (17) at the lower part of the piston (4) form sliding seal.
4. The method of using a hydraulic booster according to claim 1, wherein: the lower part of the outer cylinder (3) is sealed with the upper part of the lower joint (8) through a lower O-shaped rubber ring (7).
5. The method of using a hydraulic booster according to claim 1, wherein: the sliding sleeve (2) is a hexagonal sleeve, an inner hexagonal hole (14) is formed in the sliding sleeve, the second section of slide way (10) of the mandrel body (1) is a hexagonal body, and the inner hexagonal hole is matched with the hexagonal body.
6. The method of using a hydraulic booster according to claim 1, wherein: the side wall of the upper part of the outer cylinder (3) close to the lower part of the sliding sleeve (2) is provided with a liquid discharge hole (18).
7. The method of using a hydraulic booster according to claim 1, wherein: the outer diameter of the first section of the mandrel body (1) is the same as the outer diameter of the sliding sleeve (2) and the outer diameter of the outer cylinder (3).
8. The method of using a hydraulic booster according to claim 1, wherein: an oil pipe female buckle (9) is arranged on the first section of the mandrel body (1).
9. The method of using a hydraulic booster according to claim 1, wherein: in the third step, along with continuous drilling of the grinding shoes, the pipe column is continuously elongated, when the weight of the weight indicator is reduced to be smaller than the required weight value or no weight is hung, the weight of the pipe column cannot be used for applying the weight on the grinding shoes, the pump pressure value recorded in the second step is kept unchanged according to the pump pressure value recorded in the second step, the grinding shoes are continuously drilled, the third step is repeated, the hydraulic booster continuously moves downwards under the hydraulic action in the oil pipe, the lower joint (8) drives the outer cylinder (3) and the sliding sleeve (2) to reach the bottom dead center, at the moment, the lower end of the sliding sleeve (2) is attached to the upper end of the piston (4), the weight on the drill is reduced, the hydraulic pressurizing process is completed, and at the moment, the drill is timely delivered, and the drill delivering distance is the extension length of the outer cylinder (3).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010801458.2A CN111911103B (en) | 2020-08-11 | 2020-08-11 | Hydraulic booster and use method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010801458.2A CN111911103B (en) | 2020-08-11 | 2020-08-11 | Hydraulic booster and use method thereof |
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| CN111911103A CN111911103A (en) | 2020-11-10 |
| CN111911103B true CN111911103B (en) | 2023-10-20 |
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| CN109779520A (en) * | 2018-07-27 | 2019-05-21 | 中国石油大学(华东) | A kind of pulse type spiral percussion drilling tool |
| CN109505551A (en) * | 2018-12-27 | 2019-03-22 | 贵州高峰石油机械股份有限公司 | A kind of underground fishing type hydraulic booster release device |
| CN210829147U (en) * | 2019-08-09 | 2020-06-23 | 新疆格瑞迪斯石油技术股份有限公司 | Sleeve pipe forging and milling tool |
| CN212743933U (en) * | 2020-08-11 | 2021-03-19 | 中国石油天然气集团有限公司 | Hydraulic booster |
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| CN111911103A (en) | 2020-11-10 |
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