CN106948792B - Filling switching tool for driving sand-proof switchable control valve - Google Patents
Filling switching tool for driving sand-proof switchable control valve Download PDFInfo
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- CN106948792B CN106948792B CN201610008349.9A CN201610008349A CN106948792B CN 106948792 B CN106948792 B CN 106948792B CN 201610008349 A CN201610008349 A CN 201610008349A CN 106948792 B CN106948792 B CN 106948792B
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- Prior art keywords
- sleeve
- wall
- sand
- control
- rubber cylinder
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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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/14—Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools
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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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/1208—Packers; Plugs characterised by the construction of the sealing or packing means
-
- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/122—Multiple string packers
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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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
- E21B43/04—Gravelling of wells
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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
- E21B2200/00—Special features related to earth drilling for obtaining oil, gas or water
- E21B2200/06—Sleeve valves
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/22—Improving land use; Improving water use or availability; Controlling erosion
Abstract
The invention discloses a filling conversion tool for driving a switchable control valve for sand prevention, which comprises a control sleeve, an outer sleeve, an inner sleeve and a central tube, wherein the outer wall of the lower half section of the control sleeve is sleeved with the outer sleeve, the inner wall of the lower end of the control sleeve is sleeved with the inner sleeve, radial circulation holes are formed in the outer sleeve and the inner sleeve, a sliding piston is arranged in an annulus between the outer sleeve and the inner sleeve for opening and closing the circulation holes formed in the outer sleeve and the inner sleeve, the lower end of the outer sleeve is connected with an outer sand prevention sleeve, the lower end of the inner sleeve is connected with an inner sand prevention sleeve, and a steering body is arranged between the outer sand prevention sleeve and the inner sand prevention sleeve; the outer wall of the upper section of the outer sleeve is provided with square holes and is provided with opening claws, the outer wall of the lower section of the outer sleeve is provided with square holes and is provided with closing claws, and the lower end of the inner sand prevention sleeve is connected with the central tube. According to the invention, the controllable valve can be opened and closed by lifting and lowering the oil pipe without adding hydraulic pressure; one set of conversion tool can realize the control of a plurality of controllable valves, simplify the construction steps and shorten the operation time.
Description
Technical Field
The invention relates to an open hole sand control completion process and device for an oil exploitation well, in particular to a filling conversion tool for driving a sand control switchable control valve.
Background
Compared with a simple horizontal well screen pipe well completion, the filling sand control process for the open hole annulus of the horizontal well has great advantages: the gravel filling layer with high permeability can keep smooth between the oil well and the shaft for a long time, improve the liquid supply capacity of the oil well and ensure that the oil well keeps high yield for a long time; a sand blocking barrier is formed between the screen pipe and the open hole annulus, so that the screen pipe blockage can be slowed down or avoided, and the sand prevention effective period can be prolonged; the high-strength gravel filling layer can prevent the well wall from collapsing and keep the well wall stable. In the construction of a long-well horizontal well, due to the filtration of sand-carrying fluid, gravel is settled in advance before annulus is not filled, and sand bridge blockage is generated, so that the filling is imperfect, the sand prevention effect is poor, and the popularization and application of the filling sand prevention technology are restricted.
In order to realize balanced dense filling sand prevention of a long-well section horizontal well, a segmented filling technology is developed, wherein a sliding sleeve with a variable inner diameter is put into the well along with a well completion pipe string, and the sliding sleeve is opened step by throwing balls with different diameters, so that segmented filling is realized. This technique has the following limitations: (1) The number of the segments is limited under the influence of the size grading arrangement of the ball seats of the sliding sleeve; (2) The ball seat reduces the diameter of the completion string, the sliding sleeve is difficult to close when the completion string is lowered in the later period, and sand is spitted from the stratum to cause filling sand prevention failure.
The invention discloses a special tool for a switchable control valve for filling sand prevention, which is disclosed in the Chinese patent application No. 201310200100.4, 5.27 in 2013 and 5.27, and has the defects that (1) the complete alignment of a filling port of a service tool and a filling port of a filling switch cannot be realized, and gravels can abrade the tool during filling; (2) Sealing of two ends of a filling port cannot be achieved, and gravel flows into a well during filling, so that sand in a tubular column is blocked; (3) After filling, whether the filling switch is closed or not cannot be verified, and the risk of later sand discharge exists.
Disclosure of Invention
The invention aims to provide a filling switching tool for driving a switchable control valve for sand prevention, which is matched with the switchable control valve for sand prevention. The tool integrates the functions of opening and closing the controllable valve, sealing the inner pipe column and the outer pipe column, aligning the inner circulation port and the outer circulation port, circularly filling and the like; the controllable valve can be opened and closed by lifting and lowering the oil pipe without adding hydraulic pressure; one set of conversion tool can realize the control of a plurality of controllable valves, simplify the construction steps and shorten the operation time.
In order to achieve the purpose, the invention adopts the following technical scheme that the filling conversion tool for driving the switchable control valve for sand prevention comprises a control sleeve, an outer sleeve, an inner sleeve and a central tube, wherein the outer wall of the lower half section of the control sleeve is sleeved with the outer sleeve, the inner wall of the lower end of the control sleeve is sleeved with the inner sleeve, the outer sleeve and the inner sleeve are both provided with radial circulation holes, the lower end of the outer sleeve is connected with an outer sand prevention sleeve, the lower end of the inner sleeve is connected with an inner sand prevention sleeve, and a steering body is arranged between the outer sand prevention sleeve and the inner sand prevention sleeve; the outer wall of the upper section of the outer sleeve is provided with square holes and is provided with opening claws, the outer wall of the lower section of the outer sleeve is provided with square holes and is provided with closing claws, and the lower end of the inner sand prevention sleeve is connected with the central tube.
The upper end of the outer sleeve is connected with a sizing barrel, the sizing barrel is sleeved on the control sleeve, the upper end of the sizing barrel is provided with a sizing barrel seat, the sizing barrel seat is radially provided with holes and is provided with a centralizing block, a leaf spring is arranged between the inner wall of the centralizing block and the outer wall of the control sleeve, and the upper end of the outer sleeve is provided with an outer conical surface which is in butt joint with an inner conical surface arranged on the sizing barrel above the outer conical surface; the outer wall of the central tube is sleeved with a lower rubber cylinder seat, the outer wall of the lower rubber cylinder seat is sleeved with a lower rubber cylinder, the upper end of the lower rubber cylinder is provided with an inner conical surface which is in butt joint with an outer conical surface which is provided with the lower rubber cylinder seat, the upper end of the lower rubber cylinder seat is connected with an outer sand prevention sleeve and axially limits a steering body, and the lower end of the lower rubber cylinder is connected with a clamping seat.
The opening claw can swing, cylindrical protrusions are arranged on two sides of the rear end of the opening claw body, the front end of the opening claw body protrudes out of square holes formed in the outer wall of the upper section of the outer sleeve, torsion springs capable of enabling the opening claw to reset automatically are arranged on the cylindrical protrusions on two sides of the rear end of the opening claw body, and the closing claw is similar.
Cylindrical bulges at two sides of the rear ends of the opening claw and the closing claw are respectively pressed and fixed in the square holes through the pressing plates.
The upper end of the control sleeve is connected with an upper joint, and the lower end of the central tube is connected with a lower joint.
Compared with the prior art, the invention has the following beneficial effects:
1) The segmented filling process of opening and closing the controllable valve by using the conversion tool solves the problems of limited segmented number, reduced diameter in a well completion pipe column, non-compact filling and the like of the existing sand control process, and improves the sand control effect of a loose sandstone reservoir long well section horizontal well;
2) The controllable valve can be opened and closed by lifting and lowering the oil pipe without applying liquid pressure to the oil pipe, so that the operation is convenient, safe and reliable;
3) A set of conversion tool can be used for controlling a plurality of controllable valves, so that multistage filling sand prevention construction is realized, construction steps are simplified, and operation time is shortened;
4) Only the conversion tool can open the sliding sleeve of the controllable valve, so that the phenomenon that the controllable valve is opened by mistake to cause sand spitting of the stratum in the operation process is prevented;
5) The switching tool integrates the functions of opening and closing the controllable valve, sealing the inner pipe column and the outer pipe column, aligning the inner circulation port and the outer circulation port, filling circulation and the like.
Drawings
FIG. 1 is a schematic diagram of a packing changing tool for driving a switchable sand control valve in accordance with the present invention;
FIG. 2 is a schematic illustration of a controllable valve in semi-section;
FIG. 3 is a schematic illustration of a segmented packing completion string;
FIG. 4 is a schematic illustration of a section packing service string;
FIG. 5 is a schematic diagram of a crossover tool opening a controllable valve;
FIG. 6 is a schematic diagram of a switch tool closing controllable valve;
FIG. 7 is a schematic closing view of the combination locking mechanism;
FIG. 8 is an open schematic view of the combination locking mechanism;
fig. 9 is a plan expanded view of the orientation track.
In the figure: 1-controllable valve, 11-upper joint, 111-upper reversing groove, 12-directional track, 13-connector, 14-filling working cylinder, 141-hand-off groove, 15-sliding sleeve, 16-combined locking mechanism, 161-external locking ring, 162-internal locking ring, 163-locking cap, 17-lower joint, 171-lower reversing groove.
2-converting tool, 21-upper joint, 22-control sleeve, 23-centralizing block, 24-leaf spring, 25-upper rubber cylinder seat, 26, rubber cylinder, 261-upper rubber cylinder, 262-lower rubber cylinder, 27-outer sleeve, 28-pressing plate, 29-opening claw, 210-torsion spring, 211-inner sleeve, 212-closing claw, 213-steering body, 214-outer sand-preventing sleeve, 215-inner sand-preventing sleeve, 216-central tube, 217-lower rubber cylinder seat, 218-clamping seat and 219-lower joint.
31-surface casing, 32-oil casing, 33-grading hoops, 34-external-pipe packers, 35-sieve tubes, 36-grading packers and 37-guide shoes.
41-oil pipe, 42-guide head.
Detailed Description
The detailed description and technical content of the present invention are described below with reference to the accompanying drawings, which are provided for reference and description only, and are not intended to limit the present invention.
Referring to fig. 1 and 2, the filling and switching tool for driving the sand control switchable valve comprises an upper joint 21, a control sleeve 22, a righting block 23, a leaf spring 24, an upper rubber cylinder seat 25, an upper rubber cylinder 261, a lower rubber cylinder 262, an outer sleeve 27, a pressing plate 28, an opening claw 29, a torsion spring 210, an inner sleeve 211, a closing claw 212, a steering body 213, an outer sand control sleeve 214, an inner sand control sleeve 215, a central tube 216, a lower rubber cylinder seat 217, a clamping seat 218 and a lower joint 219. The outer wall of the lower half section of the control sleeve 22 is sleeved with an outer sleeve 27, the inner wall of the lower end of the control sleeve is sleeved with an inner sleeve 211, radial circulation holes are formed in the outer sleeve and the inner sleeve, the control sleeve can be put down to enable circulation ports of three layers of sleeves 211, 22 and 27 to be overlapped to establish circulation, the lower end of the outer sleeve is connected with an outer sand prevention sleeve 214, the lower end of the inner sleeve is connected with an inner sand prevention sleeve 215, and the outer sand prevention sleeve and the inner sand prevention sleeve only play a role in connection and sealing. A steering body 213 is arranged between the outer sand prevention sleeve and the inner sand prevention sleeve; the outer wall of the upper section of the outer sleeve is provided with a square hole and is provided with an opening claw 29, the outer wall of the lower section of the outer sleeve is provided with a square hole and is provided with a closing claw 212, and the lower end of the inner sand prevention sleeve is connected with a central pipe 216.
The opening claw 29 comprises an opening claw body, a rotating shaft and a torsion spring 210, the rear end of the opening claw body rotates on the rotating shaft, the front end of the opening claw body protrudes out of a square hole formed in the outer wall of the upper section of the outer sleeve, the torsion spring capable of enabling the opening claw to reset automatically is sleeved on the rotating shaft, and the closing claw is similar. The opening and closing jaws are each pressed into a respective square hole by a respective pressure plate 28. The upper end of the control sleeve is connected with an upper joint 21, and the lower end of the central tube is connected with a lower joint 219.
The upper end of the outer sleeve is connected with a sizing cylinder 261, the sizing cylinder is sleeved on the control sleeve 22, the upper end of the sizing cylinder is provided with a sizing cylinder seat 25, the radial hole of the sizing cylinder seat is provided with a centralizing block 23, a leaf spring 24 is arranged between the inner wall of the centralizing block and the outer wall of the control sleeve, and the upper end of the outer sleeve is provided with an outer conical surface which is in butt joint with an inner conical surface of the sizing cylinder above; the outer wall of the central tube is sleeved with a lower rubber cylinder seat 217, the outer wall of the lower rubber cylinder seat is sleeved with a lower rubber cylinder 262, the upper end of the lower rubber cylinder is provided with an inner conical surface which is in butt joint with the outer conical surface provided by the lower rubber cylinder seat, the upper end of the lower rubber cylinder seat is connected with an outer sand prevention sleeve and axially limits the steering body 213, and the lower end of the lower rubber cylinder is connected with a clamping seat 218.
The switchable filling sand prevention control valve matched with the conversion tool for use comprises an upper joint 11, a directional rail 12, a connecting body 13, a filling working cylinder 14, a sliding sleeve 15, a combined locking mechanism 16, an outer locking ring 161, an inner locking ring 162, a locking cap 163 and a lower joint 17. The upper end and the lower end of the filling working cylinder are respectively connected with an upper joint and a lower joint, the sliding sleeve is sleeved on the inner wall of the filling working cylinder, the filling working cylinder and the sliding sleeve are both provided with circulation holes, and the sliding sleeve is provided with a combined locking mechanism 16. The upper joint, the lower joint and the inner wall of the filling working cylinder are respectively provided with an upper reversing groove 111, a lower reversing groove 171 and a hand-off groove 141. The upper reversing groove and the lower reversing groove correspond to an opening claw and a closing claw of the conversion tool and are used for reversing the opening claw and the closing claw; the directional track corresponds to the righting block of the conversion tool, is used for righting the nozzle of the special tool and the controllable valve, the upper joint is connected with the filling working cylinder through a connecting body 13, and the inner wall of the upper joint is provided with a directional track 12. The combined locking mechanism comprises a locking cap 163, an inner locking ring 162 and an outer locking ring 161, wherein the sliding sleeve is provided with a radial stepped hole, the locking cap is clamped into the stepped hole, the filling working cylinder is provided with a radial annular blind groove, the outer locking ring radially stretches into the annular blind groove, the outer side of the locking cap is further embedded with an inner locking ring, and the inner side end of the locking cap is designed into a conical surface which stretches into the inner cavity of the sliding sleeve. The outer lock ring and the inner lock ring are both of C-shaped structures and have centripetal ring holding force.
Referring to fig. 3 and 4, the horizontal well casing outer section packing sand control process string comprises a completion string and a service string. The completion string comprises a casing 32, a graded collar 33, an out-of-pipe packer 34, a screen 35, a controllable valve 1, a graded packer 36 and a guide shoe 37 which are connected in sequence. Wherein the controllable valve is installed in at least one stage, and 3 stages are shown in figure 1. The service string comprises an oil pipe 41 and a conversion tool 2 and a guide head 42 which are connected in sequence.
The specific embodiments of the present invention are as follows: during well completion operation, the positions of the grading hoop 33, the external pipe packer 34, the controllable valve 1 and the grading packer 36 are determined by optimizing the grading level according to oil reservoir and electric measurement data, and then the well completion pipe string is lowered to a designated position according to design data. And (4) continuing to build pressure to open the grading hoop 33 by the wellhead build-up pressure expansion sealing pipe external packer 34, and well cementation and completion are carried out on the screen pipe section. The packing string is run in before the packing operation, and the segmented packer 36 is inflated to achieve independent packing of the production interval (this step may be omitted if a self-inflating packer is used).
During the filling construction, a coiled tubing or a common tubing is used to connect the conversion tool 2 at the bottom of the coiled tubing to form a service string, and the service string is lowered into a completion string. When the switching tool 2 reaches the upper reversing groove 111 of the controllable valve, the opening jaw 29 and the closing jaw 212 are first reversed to be directed upwards; continuing to lower the conversion tool 2, when the conversion tool reaches the lower reversing groove 171, the opening claw 29 reverses to be directed downward and the closing claw 212 continues to be kept directed upward because the lower reversing groove diameter is larger than the opening claw 29 stretching width and smaller than the closing claw 212 stretching width; at this time, the conversion tool is lifted up, if the wellhead hanging weight can rise, the closing claw 212 is indicated to clamp the lower end of the sliding sleeve 15; lowering the conversion tool again, and opening the claw 29 to clamp the upper end of the sliding sleeve 15 so as to push the sliding sleeve to move downwards; at this time, due to the size matching relationship between the outer diameter of the outer sleeve 27 and the inner diameter of the sliding sleeve 15, the outer sleeve 27 pushes the lock cap 163 to radially extend outwards, the outer lock ring 161 is ejected out, the sliding sleeve 15 is unlocked to move downwards, and the controllable valve circulation port is opened; when the pipe column is lowered, the control sleeve 22 descends to expose the circulating port of the conversion tool, the inner sleeve 211, the steering body 213 and the rubber cylinder seat 217 are pushed to descend, the lower rubber cylinder 262 seat seal is compressed, the upper joint 21 pushes the upper rubber cylinder seat 25 to descend, the upper rubber cylinder 261 seat seal is compressed, and two ends of the circulating port are sealed; the centering blocks 23 will align the transfer tool circulation port with the controllable valve circulation port due to the guiding action of the directional rail 12, at which time the staged pickling and filling operation may begin. After the construction is finished, the conversion tool 2 is lifted up, the sliding sleeve 15 is lifted up to close the controllable valve circulation port, the conversion tool 2 is lifted up continuously, the closing claw 212 reaches the hand-off groove 141, the direction is changed to be downward, the conversion tool 2 can be lifted out of the controllable valve 1, and meanwhile, the sliding sleeve 15 is locked by the external locking ring 161, so that the filling sand prevention construction of the section is completed. And repeating the steps to finish the filling operation of other layers.
The foregoing description of the preferred embodiments of the present invention is not intended to limit the scope of the invention, but rather to limit the scope of the invention to the equivalents of the claims to which the invention pertains.
Claims (3)
1. The filling conversion tool for driving the sand-preventing switchable control valve is characterized by comprising a control sleeve, an outer sleeve, an inner sleeve and a central tube, wherein the outer wall of the lower half section of the control sleeve is sleeved with the outer sleeve, the inner wall of the lower end of the control sleeve is sleeved with the inner sleeve, the outer sleeve and the inner sleeve are both provided with radial circulation holes, the lower end of the outer sleeve is connected with an outer sand-preventing sleeve, the lower end of the inner sleeve is connected with an inner sand-preventing sleeve, and a steering body is arranged between the outer sand-preventing sleeve and the inner sand-preventing sleeve; the outer wall of the upper section of the outer sleeve is provided with a square hole and is provided with an opening claw, the outer wall of the lower section of the outer sleeve is provided with a square hole and is provided with a closing claw, and the lower end of the inner sand prevention sleeve is connected with a central pipe; the opening claw can swing, cylindrical protrusions are arranged on two sides of the rear end of the opening claw body, the front end of the opening claw body protrudes out of square holes formed in the outer wall of the upper section of the outer sleeve, torsion springs capable of enabling the opening claw to reset automatically are arranged on the cylindrical protrusions on two sides of the rear end of the opening claw body, and the closing claw is similar to the opening claw;
the upper end of the outer sleeve is connected with a sizing barrel, the sizing barrel is sleeved on the control sleeve, the upper end of the sizing barrel is provided with a sizing barrel seat, the sizing barrel seat is radially provided with holes and is provided with a centralizing block, a leaf spring is arranged between the inner wall of the centralizing block and the outer wall of the control sleeve, and the upper end of the outer sleeve is provided with an outer conical surface which is in butt joint with an inner conical surface arranged on the sizing barrel above the outer conical surface; the outer wall of the central tube is sleeved with a lower rubber cylinder seat, the outer wall of the lower rubber cylinder seat is sleeved with a lower rubber cylinder, the upper end of the lower rubber cylinder is provided with an inner conical surface which is in butt joint with an outer conical surface which is provided with the lower rubber cylinder seat, the upper end of the lower rubber cylinder seat is connected with an outer sand prevention sleeve and axially limits a steering body, and the lower end of the lower rubber cylinder is connected with a clamping seat.
2. The tool for switching the filling of the switchable control valve for sand control according to claim 1, wherein the cylindrical protrusions at both sides of the rear ends of the opening jaw and the closing jaw are respectively pressed and fixed in the respective square holes by the respective pressing plates.
3. The tool for switching the filling of a switchable control valve for sand control according to claim 1, wherein the upper end of the control sleeve is connected to the upper joint, and the lower end of the center tube is connected to the lower joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610008349.9A CN106948792B (en) | 2016-01-07 | 2016-01-07 | Filling switching tool for driving sand-proof switchable control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610008349.9A CN106948792B (en) | 2016-01-07 | 2016-01-07 | Filling switching tool for driving sand-proof switchable control valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106948792A CN106948792A (en) | 2017-07-14 |
| CN106948792B true CN106948792B (en) | 2023-08-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610008349.9A Active CN106948792B (en) | 2016-01-07 | 2016-01-07 | Filling switching tool for driving sand-proof switchable control valve |
Country Status (1)
| Country | Link |
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| CN (1) | CN106948792B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111827953A (en) * | 2020-08-31 | 2020-10-27 | 中国石油天然气集团有限公司 | Downhole sand throwing tool for well drilling |
| CN116464420B (en) * | 2023-06-19 | 2023-09-05 | 东营垣发石油科技有限公司 | Filling tool for body without leaving well |
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| CN101435321A (en) * | 2008-12-26 | 2009-05-20 | 中国石油化工股份有限公司胜利油田分公司采油工艺研究院 | Horizontal well tube exterior subsection gravel filling sand prevention process and pipe column |
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| CN103758494B (en) * | 2014-01-10 | 2015-06-10 | 东营市福利德石油科技开发有限责任公司 | Horizontal well external staged fracturing sand control string and method |
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|---|---|---|---|---|
| US5931229A (en) * | 1997-05-13 | 1999-08-03 | Bj Services Company | Through tubing gravel pack system and method of gravel packing |
| JP2009114624A (en) * | 2007-11-01 | 2009-05-28 | Hitachi Sumitomo Heavy Industries Construction Crane Co Ltd | Bottom-enlarged bucket |
| CN101435321A (en) * | 2008-12-26 | 2009-05-20 | 中国石油化工股份有限公司胜利油田分公司采油工艺研究院 | Horizontal well tube exterior subsection gravel filling sand prevention process and pipe column |
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| CN106948792A (en) | 2017-07-14 |
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