CN113914821B - Retractable underground switch tool - Google Patents

Retractable underground switch tool Download PDF

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Publication number
CN113914821B
CN113914821B CN202111516915.4A CN202111516915A CN113914821B CN 113914821 B CN113914821 B CN 113914821B CN 202111516915 A CN202111516915 A CN 202111516915A CN 113914821 B CN113914821 B CN 113914821B
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China
Prior art keywords
sleeve
wall
spring
switch
main shaft
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CN202111516915.4A
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CN113914821A (en
Inventor
刘淑静
刘国滨
许腾飞
王威
罗卫
赵飞飞
焦青青
吴常顺
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Dongying Fluid Science & Technology Co ltd
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Dongying Fluid Science & Technology Co ltd
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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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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)

Abstract

The invention relates to the field of oil extraction machinery, and provides a retractable downhole switch tool, wherein an upper connector is connected with a main shaft and a central shaft, the outer wall of the main shaft is sleeved with a spring A and an outer sleeve, the lower part of the outer wall of the outer sleeve is provided with a suspension locking block, the bottom of the outer wall of the outer sleeve is in contact with an outer step surface of a limiting sleeve, the limiting sleeve is fixed on a supporting sleeve, the supporting sleeve is sleeved on the lower part of the main shaft through the locking block, a release sleeve is sleeved on the lower part of the main shaft, the outer wall of the central shaft is sleeved with a limiting ring and a spring B, and a switch block is arranged in a switch block groove on the outer wall of the central shaft; the invention is put into a well along with a sand control tool, and the pipe column is lifted up to be activated; when the switch tool is in a contraction state during the descending, the sliding sleeve cannot be opened by mistake, the tubular column is lifted up after the switch tool is descended to a preset position, the switch tool is activated by the sliding sleeve bump, and the position accuracy is high; the sliding sleeve can be totally in the closed condition, and the fracturing process is implemented current position only, avoids the fracturing in-process because of can not packing the cluster layer phenomenon appear, reduces the operation risk, avoids burying the tubular column because of cluster layer sand.

Description

Retractable underground switch tool
Technical Field
The invention relates to the field of oil extraction machinery, in particular to a retractable underground switch tool.
Background
At present, in the construction of underground operation of oil exploitation, a mechanical switching tool is adopted in the underground switching tool, the structure of the mechanical switching tool mainly comprises a plurality of groups of locking blocks arranged on a mandrel, and when the locking blocks are contracted, the locking blocks mainly compress springs arranged inside. However, the switch tool with the structure has the defects or shortcomings that the locking block cannot be retracted and blocked during operation and construction, the sliding sleeve is easy to be opened by mistake, the follow-up process is difficult to continue, the operation period is prolonged, the operation cost is increased, and the like.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provide a retractable underground switch tool.
The new technical scheme of the invention is as follows: a retractable underground switch tool comprises an upper connector, a main shaft, an outer sleeve, a spring A, a suspension locking block, a limiting sleeve, a locking block, a supporting sleeve, a shear pin, a release sleeve, a limiting ring, a spring B, a central shaft, a switch block and a spring C, wherein one end of the upper connector is connected with one end of the main shaft through a thread, and the other end of the main shaft is connected with one end of the central shaft through a thread; the upper joint is characterized in that a spring A is sleeved on the bottom of the upper joint and the outer wall of the upper part of the main shaft, the spring A is sleeved in an annular space between the main shaft and the outer sleeve, the outer sleeve is sleeved on the outer wall of the main shaft, a lock block hole is formed in the lower part of the outer wall of the outer sleeve, the hanging lock block is installed in the lock block hole, the bottom of the outer sleeve is in contact with an outer step surface of the limiting sleeve, the limiting sleeve is fixed on the supporting sleeve through a shear pin, the step of the inner wall of the limiting sleeve is in contact with the end surface of the bottom of the supporting sleeve, the supporting sleeve is sleeved on the outer wall of the lower part of the main shaft through the locking lock block, the bottom of the supporting sleeve is in contact with the top of the releasing sleeve, the releasing sleeve is sleeved on the limiting step of the lower part of the main shaft, the releasing sleeve and the outer wall of the upper part of the central shaft form an annular space, the limiting ring and the spring B are sleeved on the outer wall of the central shaft, and the bottom of the limiting ring is in contact with the top of the spring B, the lower portion of the spring B and the outer wall of the central shaft are provided with a boss A and a boss B, a switch block groove is formed between the boss A and the boss B, a switch block is installed in the switch block groove, the inner wall of the switch block is provided with a spring hole, a spring C is installed in the spring hole, and the upper portion of the switch block is in contact with the bottom of the release sleeve.
The number of the suspension locking blocks is 4.
The number of the locking blocks is 4.
The number of the switch blocks is 4.
The outer wall of the main shaft is provided with a boss and a groove.
The inner wall of the outer sleeve is provided with a boss and a groove.
The invention has the beneficial effects that: the invention is put into a well along with a sand control tool, and the pipe column is lifted up to be activated; when the tubular column is lowered to a preset position, the tubular column is lifted upwards, and the switching tool is activated through the sliding sleeve lug, so that the position is accurate and the precision is high; the sliding sleeve can be totally in the closed condition, and the fracturing process is implemented current position only, avoids the fracturing in-process because of can not packing the cluster layer phenomenon appear, reduces the operation risk, avoids burying the tubular column because of cluster layer sand.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
FIG. 2 is a schematic view of the present invention in its lower configuration.
Wherein: 1. the device comprises an upper connector, 2, a main shaft, 3, an outer sleeve, 4, springs A, 5, a suspension locking block, 6, a limiting sleeve, 7, a locking block, 8, a supporting sleeve, 9, a shear pin, 10, a release sleeve, 11, a limiting ring, 12, springs B, 13, a central shaft, 1301, bosses A, 1302, bosses B, 14, a switch block, 15, springs C, 16, a sliding sleeve, 1601, filling holes, 17 and a door pocket.
Detailed Description
The invention will be further described with reference to the accompanying drawings.
A retractable underground switch tool comprises an upper connector 1, a main shaft 2, an outer sleeve 3, a spring A4, a suspension locking block 5, a limiting sleeve 6, a locking block 7, a supporting sleeve 8, a shear pin 9, a release sleeve 10, a limiting ring 11, a spring B12, a central shaft 13, a switch block 14 and a spring C15, wherein one end of the upper connector 1 is connected with one end of the main shaft 2 through threads, and the other end of the main shaft 2 is connected with one end of the central shaft 13 through threads; the bottom of the upper joint 1 and the outer wall of the upper part of the main shaft 2 are sleeved with a spring A4, a spring A4 is sleeved in an annular space between the main shaft 2 and the outer sleeve 3, the outer sleeve 3 is sleeved on the outer wall of the main shaft 2, the lower part of the outer wall of the outer sleeve 3 is provided with a lock block hole, a suspension lock block 5 is arranged in the lock block hole, the bottom of the outer sleeve 3 is contacted with the outer step surface of a limit sleeve 6, the limit sleeve 6 is fixed on a support sleeve 8 through a shear pin 9, the step of the inner wall of the limit sleeve 6 is contacted with the end surface of the bottom of the support sleeve 8, the support sleeve 8 is sleeved on the outer wall of the lower part of the main shaft 2 through a locking lock block 7, the bottom of the support sleeve 8 is contacted with the top of a release sleeve 10, the release sleeve 10 is sleeved on the limit step of the lower part of the main shaft 2, the release sleeve 10 and the outer wall of the upper part of the central shaft 13 form an annular space, a limit ring 11 and a spring B12 are sleeved on the outer wall of the central shaft 13 in the annular space, and the bottom of the limiting ring 11 is contacted with the top of a spring B12, a boss A1301 and a boss B1302 are arranged on the lower portion of the spring B12 and on the outer wall of the central shaft 13, a switch block groove is formed between the boss A1301 and the boss B1302, a switch block 14 is installed in the switch block groove, a spring hole is formed in the inner wall of the switch block 14, a spring C15 is installed in the spring hole, and the upper portion of the switch block 14 is contacted with the bottom of the release sleeve 10.
The number of the suspension locking blocks 5 is 4.
The number of the locking blocks 7 is 4.
The number of the switch blocks 14 is 4.
The outer wall of the main shaft 2 is provided with a boss and a groove.
The inner wall of the outer sleeve 3 is provided with a boss and a groove.
The working principle is as follows: during construction, the retractable underground switch tool is put into a well along with a service tool, in the process of putting into the well, the protruded hanging locking block 5 in the switch tool is in contact with the inner wall of the sliding sleeve 16, the retractable underground switch tool continues to go downwards, the protruded hanging locking block 5 drives the outer sleeve 3 to go upwards, and the spring A4 is compressed until the hanging locking block 5 falls into a groove formed in the outer wall of the main shaft 2. After the retractable downhole switch tool is lowered to the set position, the spring A4 pushes the outer sleeve 3 to move downwards, the suspension locking block 5 is pushed to the original position, and the suspension locking block 5 protrudes again.
When the door pocket 17 in the sliding sleeve 16 needs to be opened and closed, the retractable underground opening and closing tool is lifted, after the convex suspension locking block 5 is contacted with the inner wall of the sliding sleeve 16, the opening and closing tool continuously moves upwards, the convex suspension locking block 5 drives the outer sleeve 3 to move downwards, the spring A4 is released, the outer sleeve 3 pushes the limiting sleeve 6 to move downwards, the shear pin 9 is cut off, and the limiting sleeve 6 and the outer sleeve 3 continuously move downwards until the suspension locking block 5 falls into a groove formed in the outer wall of the lower part of the main shaft 2. At this time, the locking block 7 has a releasing space, the spring B12 pushes the limiting ring 11 to move upwards, the limiting ring 11 pushes the releasing sleeve 10, the supporting sleeve 8 and the locking block 7 to move upwards, the locking block 7 moves to the convex surface of the spindle 2, and the spring C15 releases the switch block 14. And continuously lifting the retractable underground switch tool, wherein a switch block 14 of the retractable underground switch tool falls into a groove formed in the inner wall of the door pocket 17, the door pocket 17 moves upwards along with the retractable underground switch tool, and a filling hole 1601 formed in the sliding sleeve 16 is closed.

Claims (6)

1. The utility model provides a retractable switching tool in pit, includes top connection, main shaft, overcoat, spring A, hangs locking piece, stop collar, locking piece, supports the cover, cuts the round pin, releases cover, spacing ring, spring B, center pin, switch block and spring C, its characterized in that: one end of the upper joint is connected with one end of the main shaft through threads, and the other end of the main shaft is connected with one end of the central shaft through threads; the upper joint is characterized in that a spring A is sleeved on the bottom of the upper joint and the outer wall of the upper part of the main shaft, the spring A is sleeved in an annular space between the main shaft and the outer sleeve, the outer sleeve is sleeved on the outer wall of the main shaft, a lock block hole is formed in the lower part of the outer wall of the outer sleeve, the hanging lock block is installed in the lock block hole, the bottom of the outer sleeve is in contact with an outer step surface of the limiting sleeve, the limiting sleeve is fixed on the supporting sleeve through a shear pin, the step of the inner wall of the limiting sleeve is in contact with the end surface of the bottom of the supporting sleeve, the supporting sleeve is sleeved on the outer wall of the lower part of the main shaft through the locking lock block, the bottom of the supporting sleeve is in contact with the top of the releasing sleeve, the releasing sleeve is sleeved on the limiting step of the lower part of the main shaft, the releasing sleeve and the outer wall of the upper part of the central shaft form an annular space, the limiting ring and the spring B are sleeved on the outer wall of the central shaft, and the bottom of the limiting ring is in contact with the top of the spring B, the lower part of the spring B and the outer wall of the central shaft are provided with a boss A and a boss B, a switch block groove is arranged between the boss A and the boss B, a switch block is arranged in the switch block groove, the inner wall of the switch block is provided with a spring hole, a spring C is arranged in the spring hole, and the upper part of the switch block is contacted with the bottom of the release sleeve;
the retractable underground switch tool is put into a well along with a service tool, in the putting-in process, a protruding hanging locking block in the switch tool is in contact with the inner wall of the sliding sleeve, the retractable underground switch tool continues to move downwards, the protruding hanging locking block drives the outer sleeve to move upwards, and the spring A is compressed until the hanging locking block falls into a groove formed in the outer wall of the main shaft; after the retractable underground switch tool is lowered to a set position, the spring A pushes the outer sleeve to move downwards to push the suspension locking block to the original position, and the suspension locking block protrudes again;
when a door pocket in the sliding sleeve needs to be opened and closed, the retractable underground opening and closing tool is lifted upwards, after the protruding hanging locking block is contacted with the inner wall of the sliding sleeve, the opening and closing tool continues to go upwards, the protruding hanging locking block drives the outer sleeve to go downwards, the spring A is released, the outer sleeve pushes the limiting sleeve to go downwards, the shearing pin is sheared off, and the limiting sleeve and the outer sleeve continue to go downwards until the hanging locking block falls into a groove formed in the outer wall of the lower portion of the main shaft; at the moment, the locking block has a releasing space, the spring B pushes the limiting ring to move upwards, the limiting ring pushes the releasing sleeve, the supporting sleeve and the locking block to move upwards, the locking block moves to the protruding surface of the main shaft, and meanwhile, the spring C releases the switch block; and continuously lifting the retractable underground switch tool, wherein a switch block of the retractable underground switch tool falls into a groove formed in the inner wall of the door pocket, and the door pocket moves upwards along with the retractable underground switch tool to seal a filling hole formed in the sliding sleeve.
2. A retractable downhole switch tool according to claim 1, wherein: the number of the suspension locking blocks is 4.
3. A retractable downhole switch tool according to claim 1, wherein: the number of the locking blocks is 4.
4. A retractable downhole switch tool according to claim 1, wherein: the number of the switch blocks is 4.
5. A retractable downhole switch tool according to claim 1, wherein: the outer wall of the main shaft is provided with a boss and a groove.
6. A retractable downhole switch tool according to claim 1, wherein: the inner wall of the outer sleeve is provided with a boss and a groove.
CN202111516915.4A 2021-12-13 2021-12-13 Retractable underground switch tool Active CN113914821B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111516915.4A CN113914821B (en) 2021-12-13 2021-12-13 Retractable underground switch tool

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111516915.4A CN113914821B (en) 2021-12-13 2021-12-13 Retractable underground switch tool

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CN113914821B true CN113914821B (en) 2022-02-25

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3856082A (en) * 1973-03-26 1974-12-24 Macco Oil Tool Co Inc Selective positioning well tool apparatus
US5549161A (en) * 1995-03-06 1996-08-27 Baker Hughes Incorporated Overpull shifting tool
CN103711456A (en) * 2013-12-16 2014-04-09 东营市福利德石油科技开发有限责任公司 Hydraulic switching tool for deep-water oil well
CN207004480U (en) * 2017-08-02 2018-02-13 荆州市赛瑞能源技术有限公司 A kind of mechanical-vibration type sliding sleeve switch instrument
CN112502665A (en) * 2020-12-16 2021-03-16 贵州高峰石油机械股份有限公司 Mechanical sliding sleeve opening and closing tool
CN113374446A (en) * 2021-06-21 2021-09-10 湖南唯科拓石油科技服务有限公司 Trigger type sliding sleeve opening and closing tool

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3856082A (en) * 1973-03-26 1974-12-24 Macco Oil Tool Co Inc Selective positioning well tool apparatus
US5549161A (en) * 1995-03-06 1996-08-27 Baker Hughes Incorporated Overpull shifting tool
CN103711456A (en) * 2013-12-16 2014-04-09 东营市福利德石油科技开发有限责任公司 Hydraulic switching tool for deep-water oil well
CN207004480U (en) * 2017-08-02 2018-02-13 荆州市赛瑞能源技术有限公司 A kind of mechanical-vibration type sliding sleeve switch instrument
CN112502665A (en) * 2020-12-16 2021-03-16 贵州高峰石油机械股份有限公司 Mechanical sliding sleeve opening and closing tool
CN113374446A (en) * 2021-06-21 2021-09-10 湖南唯科拓石油科技服务有限公司 Trigger type sliding sleeve opening and closing tool

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
机械式滑套开关多级找堵水技术研究与应用;赵崇镇;《石油机械》;20160510;第44卷(第05期);第90-93页 *

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