CN113503144B - Sliding sleeve rotating-upright post locking type shaft bottom safety valve - Google Patents
Sliding sleeve rotating-upright post locking type shaft bottom safety valve Download PDFInfo
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- CN113503144B CN113503144B CN202110723652.8A CN202110723652A CN113503144B CN 113503144 B CN113503144 B CN 113503144B CN 202110723652 A CN202110723652 A CN 202110723652A CN 113503144 B CN113503144 B CN 113503144B
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- 230000007246 mechanism Effects 0.000 claims abstract description 48
- 238000007789 sealing Methods 0.000 claims abstract description 14
- 230000004888 barrier function Effects 0.000 claims 1
- 239000003129 oil well Substances 0.000 abstract description 16
- 230000001960 triggered effect Effects 0.000 abstract description 2
- 125000004122 cyclic group Chemical group 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 17
- 230000009471 action Effects 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000005086 pumping Methods 0.000 description 4
- 230000006378 damage Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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)
- Preventing Unauthorised Actuation Of Valves (AREA)
Abstract
The invention provides a sliding sleeve rotating-upright post locking type shaft bottom safety valve, which comprises: the cylinder body is provided with a guide pin; a sliding sleeve rotating mechanism, a middle baffle and a locking mechanism are sequentially arranged in the cylinder body from top to bottom; the sliding sleeve rotating mechanism and the middle baffle can slide up and down in the cylinder body; when the sliding sleeve rotating mechanism is pressed, the sliding sleeve rotating mechanism is attached to the middle baffle under the guidance of the guide pin, so that the safety valve at the bottom of the well is closed; when the sliding sleeve rotating mechanism is pressed again, the sliding sleeve rotating mechanism is disconnected with the middle baffle under the guidance of the guide pin, so that the safety valve at the bottom of the well is opened; after the guide pin is cut off by external force, the middle baffle plate triggers the locking mechanism under the pushing of the sliding sleeve rotating mechanism, and the permanent sealing of the shaft is realized. The shaft bottom safety valve can realize the functions of cyclic opening and closing; under the extreme working condition, the polished rod is loosened, the sucker rod string falls freely, the safety valve locking mechanism is triggered to quickly seal the well, and the safe and reliable sealing of the oil well is realized.
Description
Technical Field
The invention relates to the technical field of machinery, in particular to a sliding sleeve rotating-upright column locking type shaft bottom safety valve.
Background
The offshore oil well has special working environment, and for extreme weather, the offshore oil well needs to be shut down and shut down, and platform workers leave the offshore platform; in addition, in order to prevent accidents such as crude oil production and environmental pollution caused by platform overturning, platform collision, well bore damage of the oil well and the like, the offshore oil well is required to be provided with a bottom safety valve besides a ground valve.
The underground safety valve is equipment installed in an oil gas well, and can be closed emergently under special conditions, so that harm is relieved actively, and environmental influence is reduced. Because of the high safety level requirements of offshore wells, downhole safety valves have been widely studied. Due to different purposes and requirements, the switch structure has great difference. The switch types are various and can be divided into a hydraulic control type, a pressing type, an automatic type, a lifting pipe column type and the like according to the control types.
The well bottom safety valve of hydraulic control type is the most commonly used underground switch at present, the ground hydraulic station provides power fluid, the hydraulic pipeline is put into the well, the well bottom switch action of remote control. Typical hydraulic control type shaft bottom safety valves comprise safety valves for oil well drill pipes, micro piston underground safety valves, sliding sleeve type underground safety valves and the like, the hydraulic control type shaft bottom safety valves are simple in structure and convenient to operate, but hydraulic pipelines need to be put into a shaft due to the fact that a ground hydraulic station remotely controls the underground switch, and therefore installation is troublesome and use cost is high; in addition, when the switch is used, a hydraulic pipeline needs to be kept pressure all the time, the switch fails due to on-way pressure loss or leakage, and certain potential safety hazards exist in pipeline pressure maintenance.
The pressurized well bottom safety valve is opened or closed by pressurizing a well shaft, and is usually used for manually closing a well during well repair and well washing operations. Typical pressurized well bottom safety valves include a well bottom switch for protecting an oil layer for a multi-sand well, a well bottom end hydraulic switch and the like; the pressurized safety valve at the bottom of the well is placed at the bottom of the well, the well is easily pressurized into the well during drilling and workover, but the well shaft is very troublesome to close by pressurizing during normal operation of the well, and the application range of the switch is influenced.
The automatic safety valve at bottom of well can be opened or closed by the pressure difference of well shaft without monitoring the working condition at bottom of well and controlling by external mechanism, and can be automatically closed when blowout accident occurs. Typical automatic bottom-hole safety valves include a buoyancy type valve bottom-hole blowout prevention switch, a self-control oil layer protection bottom-hole switch, a sand prevention buried well-flushing oil layer protector and the like; the automatic shaft bottom safety valve is mainly used for preventing well leakage and blowout during well washing and well repairing, but cannot be opened underground after being closed, and cannot be used as a conventional shaft bottom safety valve.
The upper oil lifting pipe type shaft bottom safety valve is opened or closed by adopting a mode of lifting an oil pipe column, and typical lifting pipe type shaft bottom safety valves comprise a shaft bottom pipe column passing switching valve device for oil well production, a novel oil layer protection valve and the like. The upper oil extraction pipe type well bottom safety valve needs large-scale matched equipment for lifting an oil pipe, is complex in field operation and high in operation cost, and is only suitable for overhaul operation.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a sliding sleeve rotating-upright column locking type shaft bottom safety valve suitable for offshore sucker-rod pump oil production.
A sliding sleeve rotary-column lock-up shaft bottom safety valve comprising: the device comprises a cylinder body, wherein a guide pin is arranged on the cylinder body; a sliding sleeve rotating mechanism, a middle baffle and a locking mechanism are sequentially arranged in the cylinder body from top to bottom; the sliding sleeve rotating mechanism and the middle baffle can slide up and down in the cylinder body;
when the sliding sleeve rotating mechanism is pressed, the sliding sleeve rotating mechanism is attached to the middle baffle under the guidance of the guide pin to realize sealing connection, so that a flow passage of a shaft is blocked, and the closing of a safety valve at the bottom of the shaft is realized;
when the sliding sleeve rotating mechanism is pressed again, the sliding sleeve rotating mechanism is disconnected with the middle baffle under the guidance of the guide pin, so that a shaft flow passage is smooth, and the opening of a shaft bottom safety valve is realized;
after the guide pin is cut off by external force, the middle baffle plate triggers the locking mechanism under the pushing of the sliding sleeve rotating mechanism, and the permanent sealing of the shaft is realized.
Further, the sliding sleeve rotary-column dead-lock downhole safety valve as described above, the sliding sleeve rotary mechanism comprising: the sliding sleeve can slide up and down in the cylinder body, and the upper spring is sleeved on the sliding sleeve;
the upper spring is arranged between the spring end cover and the middle barrel; a sawtooth sliding rail is arranged on the sliding sleeve;
the end part of the guide pin is positioned in the sawtooth slide rail, and when the end part of the sliding sleeve is pressed, the sliding sleeve can rotate under the guide of the guide pin.
Further, according to the sliding sleeve rotation-upright post locking type shaft bottom safety valve, the other end of the sliding sleeve is provided with a through hole, the middle baffle is provided with a conical core corresponding to the through hole, and when the end part of the sliding sleeve is pressed, the through hole in the sliding sleeve is matched with the conical core to complete the on-off of the flow passage.
Further, the sliding sleeve rotary-column locking type downhole safety valve is characterized in that the guide pin is enclosed in the cylinder body through the baffle ring.
Further, the sliding sleeve rotary-column locking type downhole safety valve as described above, the locking mechanism comprising: the device comprises a stand column, a lower spring, a locking baffle and a clamp spring;
the upright post is fixed on one surface of the middle baffle plate, which is back to the sliding sleeve rotating mechanism, the lower spring is sleeved on the upright post, one end of the lower spring abuts against the middle baffle plate, and the other end of the lower spring abuts against the locking baffle plate;
the front surface of the locking baffle is provided with a registration hole corresponding to the position of the upright post, and the clamp spring is arranged on the back surface of the locking baffle;
and a clamping groove is formed in the end part of the upright post, and after the end part of the upright post is inserted into the alignment hole, the clamping groove is clamped by the clamping spring so as to realize permanent sealing of the safety valve at the bottom of the well.
Further, according to the sliding sleeve rotation-upright locking type shaft bottom safety valve, 3 upright posts are arranged on the baffle in parallel.
Further, the sliding sleeve rotating-upright column locking type shaft bottom safety valve comprises an upper joint, an upper sleeve, a middle sleeve, a lower sleeve and a lower joint which are sequentially connected through threads.
Has the advantages that:
the well bottom safety valve provided by the invention can carry out operations such as well workover and the like when the oil pipe is unobstructed in an open state and closed state. And the sucker rod string is used as a trigger source of the switch, so that the switch is convenient and efficient, the circulating action of an opening-closing state can be realized, the functions of the well bottom safety valve such as a pressurizing type, a hydraulic control type and a pipe lifting column type are realized, the blocking and locking functions of the automatic well bottom safety valve are realized, the functions of the existing well bottom safety valve are improved, and the switch is convenient to operate, safe and reliable.
Drawings
FIG. 1 illustrates the location of the downhole safety valve of the present invention on the pump barrel;
FIG. 2 (a) is a schematic view of a first embodiment of the downhole safety valve of the present invention;
FIG. 2 (b) is a schematic diagram of a downhole safety valve configuration of the present invention II;
FIG. 3 is a schematic view of the closed state configuration of the downhole safety valve of the present invention;
FIG. 4 is a schematic view of the open-state structure of the downhole safety valve of the present invention;
FIG. 5 is a schematic view of a dead lock configuration of the downhole safety valve of the present invention;
description of the drawings:
1-upper joint; 2-upper sleeve; 3-a spring end cap; 4-a sliding sleeve; 5-spring up; 6-intermediate cylinder; 7-a guide pin; 8-baffle ring; 9-intermediate baffle plate; 10-upright post; 11-a lower sleeve; 12-a lower spring; 13-locking the baffle; 14-a clamp spring; 15-lower joint; 16-a fixed valve; 17-traveling valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention are described below clearly and completely, and it is obvious that the described embodiments are some, not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the downhole safety valve of the present invention is installed as part of the pump barrel structure between a fixed valve 16 and a traveling valve 17. The sucker rod string provides power for the safety valve, and the switch is triggered by the mode that a plunger connected with the sucker rod string contacts and presses down the switch, so that the safety valve is opened or closed.
The invention provides a sliding sleeve rotating-upright post locking type shaft bottom safety valve, which comprises: the cylinder body is provided with a guide pin 7; a sliding sleeve rotating mechanism, a middle baffle 9 and a locking mechanism are sequentially arranged in the cylinder body from top to bottom; the sliding sleeve rotating mechanism and the middle baffle 9 can slide up and down in the cylinder body;
when the sliding sleeve rotating mechanism is pressed, the sliding sleeve rotating mechanism is attached to the middle baffle 9 under the guidance of the guide pin 7 to realize sealing connection, so that a shaft flow passage is blocked, and the closing of a shaft bottom safety valve is realized;
when the sliding sleeve rotating mechanism is pressed again, the sliding sleeve rotating mechanism is disconnected with the middle baffle 9 under the guidance of the guide pin 7, so that a shaft flow passage is smooth, and the opening of a safety valve at the bottom of a well is realized;
after the guide pin 7 is cut off by external force, the middle baffle 9 triggers the locking mechanism under the pushing of the sliding sleeve rotating mechanism, and the permanent sealing of the shaft is realized.
As shown in fig. 2 (a) and 2 (b), the barrel of the downhole safety valve is formed by sequentially connecting an upper joint 1, an upper sleeve 2, an intermediate barrel 6, a lower sleeve 11 and a lower joint 15 in a threaded manner. The downhole safety valve of the present invention is installed between the traveling valve 17 and the fixed valve 16 as a short circuit of the pump cylinder. The upper joint 1 and the lower joint 15 are respectively connected with the pump cylinder through threads. The cylinder body is internally provided with a spring end cover 3, a sliding sleeve 4, an upper spring 5, a middle cylinder 6, a baffle ring 8, a middle baffle plate 9, an upright post 10, a lower spring 12, a locking baffle plate 13, a snap spring 14 and a lower joint 15.
Specifically, the sliding sleeve rotating mechanism includes: the sliding sleeve 4 can slide up and down in the cylinder body, and the upper spring 5 is sleeved on the sliding sleeve 4;
the upper spring 5 is arranged between the spring end cover 3 and the middle barrel 6; a sawtooth sliding rail is arranged on the sliding sleeve 4;
the end of the guide pin 7 is located in the sawtooth slide rail, and when the end of the sliding sleeve 4 is pressed, the sliding sleeve 4 can rotate under the guide of the guide pin 7.
The other end of the sliding sleeve 4 is provided with a through hole, the locking mechanism is provided with a conical core corresponding to the through hole, and when the end of the sliding sleeve 4 is pressed, the through hole on the sliding sleeve 4 is matched with the conical core to complete the on-off of the flow channel. The guide pin 7 is enclosed in the cylinder by a stop ring 8.
The locking mechanism includes: the device comprises a vertical column 10, a lower spring 12, a locking baffle 13 and a clamp spring 14;
the upright post 10 is fixed on one surface of the middle baffle 9, which is back to the sliding sleeve rotating mechanism, the lower spring 12 is sleeved on the upright post 10, one end of the lower spring abuts against the middle baffle 9, and the other end abuts against the locking baffle 13;
the front surface of the locking baffle 13 is provided with a registration hole corresponding to the position of the upright post 10, and the clamp spring 14 is installed on the back surface of the locking baffle 13;
a clamping groove is arranged at the end part of the upright post 10, and after the end part of the upright post 10 is inserted into the alignment hole, the clamping groove is clamped by the clamping spring 14 so as to realize the permanent sealing of the shaft bottom safety valve.
An upper spring 5 is arranged in the sleeve 2, the upper spring 5 supports a spring end cover 3, the spring end cover 3 is connected with the sliding sleeve 4 through threads, a guide pin 7 is arranged on the middle barrel 6, and the guide pin 7 is located in a sawtooth sliding rail of the sliding sleeve 4. The spring end cover 3 is pressed, the upper spring 5 is compressed, the sliding sleeve 4 rotates under the guide of the guide pin 7, and under the combined action of the upper spring 5 and the guide pin 7, the through hole at the bottom of the sliding sleeve 4 is matched with the conical core of the middle baffle 9 to complete the on-off of a flow passage, namely the opening and closing of a safety valve at the bottom of a well. The external force presses the safety valve at the bottom of the well once, and the opening or closing state of the safety valve is switched once for recycling.
3 upright posts 10 are uniformly distributed on the middle baffle plate 9 in the circumferential direction, 3 alignment holes are machined in the positions, coaxial with the 3 upright posts 10, of the locking baffle plate 13, a clamp spring 14 is installed on the back face of the locking baffle plate 13, in the normal production period of the oil well, the upright posts 10 on the middle baffle plate 9 are separated from the locking baffle plate 13 by the lower spring 12, after the guide pin 7 is sheared by external force, the middle baffle plate 9 is pressed to move downwards, the upright posts 10 enter the alignment holes of the locking baffle plate 13, the clamp spring 14 clamps the positions of the small grooves on the upright posts 10, the well shaft is closed, the well bottom safety valve cannot be opened by the external force in the well, reliable well sealing of the well shaft is achieved, and the safety of the oil well is guaranteed.
The working process is as follows:
the spring end cover 3 is pressed, the upper spring 5 is compressed, the sliding sleeve 4 rotates under the guide of the guide pin 7, after the pressure on the spring end cover 3 is removed, the upper spring 5 rebounds, the guide pin 7 on the middle barrel 6 falls in a short track of the sliding sleeve 4, and the sliding sleeve 4 is positioned at the lower position and extends into the lower sleeve 11. Meanwhile, the middle baffle 9 is attached to the end of the sliding sleeve 4 under the action of the compression spring force of the lower spring 12, the frustum on the middle baffle 9 enters the taper hole of the sliding sleeve 4, the frustum-taper hole structure is matched to block a shaft flow passage, and at the moment, the sliding sleeve rotates and the vertical column locking type shaft bottom safety valve is closed, as shown in fig. 3.
In the closed state shown in fig. 3, the spring end cover 3 is pressed again, the sliding sleeve 4 rotates again under the guidance of the guide pin 7, and the sliding sleeve 4 pushes the intermediate baffle 9 to move downwards together in the downward process. After the pressure on the spring end cover 3 is removed, the sliding sleeve 4 moves upwards together with the middle baffle 9, the end part from the middle baffle 9 to the middle barrel 6 stops moving upwards, and the sliding sleeve 4 rotates, so that the guide pin 7 is positioned on the long track of the sliding sleeve 4, the sliding sleeve 4 continues moving upwards under the elasticity of the upper spring 5, the tail end of the long track reaches the position of the guide pin 7, and the sliding sleeve 4 stops moving upwards. The sliding sleeve 4 is separated from the middle baffle 9, the shaft flow passage is smooth, the sliding sleeve rotates, and the shaft bottom safety valve is opened in a mode of locking the upright column, as shown in figure 4.
If the shaft needs to be completely closed, operations such as well repair, well killing, pump detection and the like are carried out, or emergency situations such as well closing and platform evacuation are needed under extreme sea conditions of offshore rod production, the pumping unit stops, suspension point load loss occurs, the sucker rod column falls down, the spring end cover 3 and the sliding sleeve 4 are pressed to descend together, the guide pin 7 is cut off, and the middle baffle 9 is pushed to descend rapidly; the upright post 10 on the middle baffle 9 enters the alignment hole of the locking baffle 13, the clamp spring 14 clamps the position of the small groove on the upright post 10, the shaft is closed, and the shaft bottom safety valve cannot be opened by the external force in the well, so that the reliable well sealing of the shaft is realized, and the safety of the oil well is guaranteed. The sliding sleeve rotates and the vertical column is locked, and the shaft bottom safety valve is in a locked state, as shown in figure 5.
The sliding sleeve rotation and stand column locking type shaft bottom safety valve can realize the opening and closing functions of the shaft bottom of an oil well during the conventional operation of the oil well, and in an emergency state, through the load loss of an oil pumping unit, the self weight of a sucker rod column can close a shaft bottom switch and lock the switch, so that the purpose of sealing the well from the shaft bottom is achieved.
The bottom-hole safety valve mainly has several forms of automatic type, pressurizing type, hydraulic control type and lifting pipe column type, wherein the pressurizing type bottom-hole safety valve and the hydraulic control type bottom-hole safety valve are controlled by hydraulic power, so that the problems of power fluid leakage and switch failure exist, and potential safety hazards are caused by pressure maintaining. The shaft bottom safety valve adopts a mechanical spring type structure, utilizes the sucker rod string as a power source, is safe and reliable, and is convenient to open and close.
The automatic shaft bottom safety valve has single action, can not be opened underground after being closed, and can only be used as the last safety valve of an oil well. The invention adopts a sliding sleeve-spring structure, the sliding sleeve rotates under the guide of the guide pin and resets under the action of spring force, the circular opening-closing of the safety valve can be realized, and the automatic shaft bottom safety valve also has the locking function under the extreme working condition.
The pipe lifting column type well bottom safety valve adopts the mode of lifting the oil pipe to close a well bottom switch, the operation of lifting the oil pipe on site is very troublesome, and a plurality of matched devices are needed. The invention adopts the mode of lifting and lowering the sucker rod string to control the safety valve at the bottom of the well, and the well-head pumping unit can complete the action without additional equipment, thus the operation is convenient and fast.
The invention relates to a shaft bottom safety valve designed for offshore platform rod oil production, which has higher safety level requirement than a land oil well, so the shaft bottom safety valve is also suitable for the land rod oil production well. At present, the total number of pumping wells put into use by each large oil field in China exceeds 20 ten thousand, and accounts for about 90% of the total number of the oil wells in service, so that the invention has wide application prospect.
The invention has the advantages of integral mechanical structure, reliability, durability and wide applicable oil well range.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (6)
1. A sliding sleeve rotary-column lock-up downhole safety valve, comprising: a cylinder body, on which a guide pin (7) is provided; a sliding sleeve rotating mechanism, a middle baffle (9) and a locking mechanism are sequentially arranged in the cylinder body from top to bottom; the sliding sleeve rotating mechanism and the middle baffle (9) can slide up and down in the cylinder body;
when the sliding sleeve rotating mechanism is pressed, the sliding sleeve rotating mechanism is attached to the middle baffle (9) under the guidance of the guide pin (7) to realize sealing connection, so that a shaft flow passage is blocked, and the closing of a shaft bottom safety valve is realized;
when the sliding sleeve rotating mechanism is pressed again, the sliding sleeve rotating mechanism is disconnected with the middle baffle (9) under the guidance of the guide pin (7), so that a shaft flow passage is smooth, and the opening of a shaft bottom safety valve is realized;
after the guide pin (7) is cut off by external force, the middle baffle (9) triggers the locking mechanism under the pushing of the sliding sleeve rotating mechanism to realize the permanent sealing of the shaft;
the locking mechanism includes: the device comprises a vertical column (10), a lower spring (12), a locking baffle plate (13) and a clamp spring (14);
the upright post (10) is fixed on one surface of the middle baffle (9) which is back to the sliding sleeve rotating mechanism, the lower spring (12) is sleeved on the upright post (10), one end of the lower spring abuts against the middle baffle (9), and the other end of the lower spring abuts against the locking baffle (13);
the front surface of the locking baffle (13) is provided with a registration hole corresponding to the position of the upright post (10), and the clamp spring (14) is installed on the back surface of the locking baffle (13);
and a clamping groove is formed in the end part of the upright post (10), and after the end part of the upright post (10) is inserted into the alignment hole, the clamping groove is clamped by the clamping spring (14) so as to realize the permanent sealing of the safety valve at the bottom of the well.
2. The sliding sleeve rotary-column lock-up downhole safety valve of claim 1, wherein the sliding sleeve rotary mechanism comprises: a sliding sleeve (4) capable of sliding up and down in the cylinder body, and an upper spring (5) sleeved on the sliding sleeve (4);
the upper spring (5) is arranged between the spring end cover (3) and the middle barrel (6); a sawtooth sliding rail is arranged on the sliding sleeve (4);
the end part of the guide pin (7) is positioned in the sawtooth slide rail, and when the end part of the sliding sleeve (4) is pressed, the sliding sleeve (4) can rotate under the guide of the guide pin (7).
3. The sliding sleeve rotary-column locking type downhole safety valve according to claim 2, wherein a through hole is formed at the other end of the sliding sleeve (4), a conical core corresponding to the through hole is formed on the intermediate baffle (9), and the through hole on the sliding sleeve (4) is matched with the conical core to complete the on-off of the flow passage when the end of the sliding sleeve (4) is pressed.
4. The sliding sleeve rotary-column lock-up type shaft bottom safety valve according to claim 2, characterized in that the guide pin (7) is enclosed in the cylinder by a stop ring (8).
5. Sliding sleeve rotary-column lock-up shaft bottom safety valve according to claim 1, characterized in that 3 columns (10) are arranged in parallel on the intermediate barrier (9).
6. The sliding sleeve rotary-column locking type shaft bottom safety valve according to claim 1, characterized in that the barrel body is formed by sequentially connecting an upper joint (1), an upper sleeve (2), an intermediate barrel (6), a lower sleeve (11) and a lower joint (15) in a threaded manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110723652.8A CN113503144B (en) | 2021-06-29 | 2021-06-29 | Sliding sleeve rotating-upright post locking type shaft bottom safety valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110723652.8A CN113503144B (en) | 2021-06-29 | 2021-06-29 | Sliding sleeve rotating-upright post locking type shaft bottom safety valve |
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| CN113503144A CN113503144A (en) | 2021-10-15 |
| CN113503144B true CN113503144B (en) | 2023-02-17 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB201319883D0 (en) * | 2013-11-11 | 2013-12-25 | Xtreme Innovations Ltd | Downhole Tool |
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| CN105814610A (en) * | 2013-10-23 | 2016-07-27 | 兰德马克绘图国际公司 | Three dimensional wellbore visualization |
| CN103573214A (en) * | 2013-11-06 | 2014-02-12 | 盐城彩阳电器阀门有限公司 | Circulation bottom valve which works with pressure |
| CN106930936A (en) * | 2015-12-30 | 2017-07-07 | 中国海洋大学 | A kind of marine sucker rod pumping well safe valve |
| CN205532476U (en) * | 2016-03-28 | 2016-08-31 | 中国石油天然气股份有限公司 | Underground control valve |
| CN109025918A (en) * | 2018-09-16 | 2018-12-18 | 东营市汇诚石油工程技术有限责任公司 | Fixed tubular column changes a layer pumping means |
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| CN113503144A (en) | 2021-10-15 |
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