CN114645951A - Opening and closing device for mechanical downward pressing type gate valve - Google Patents

Opening and closing device for mechanical downward pressing type gate valve Download PDF

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Publication number
CN114645951A
CN114645951A CN202011491201.8A CN202011491201A CN114645951A CN 114645951 A CN114645951 A CN 114645951A CN 202011491201 A CN202011491201 A CN 202011491201A CN 114645951 A CN114645951 A CN 114645951A
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CN
China
Prior art keywords
pressing
short section
lower pressing
sleeve
push
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Granted
Application number
CN202011491201.8A
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Chinese (zh)
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CN114645951B (en
Inventor
马兰荣
马开华
谷磊
尹慧博
程光明
张文平
马善坤
候跃全
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China Petroleum and Chemical Corp
Sinopec Research Institute of Petroleum Engineering
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China Petroleum and Chemical Corp
Sinopec Research Institute of Petroleum Engineering
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Priority to CN202011491201.8A priority Critical patent/CN114645951B/en
Publication of CN114645951A publication Critical patent/CN114645951A/en
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Publication of CN114645951B publication Critical patent/CN114645951B/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
    • F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
    • F16K1/20—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation arranged externally of valve member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/36—Valve members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • F16K27/0209—Check valves or pivoted valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/44—Mechanical actuating means
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/20—Hydro energy

Abstract

The invention provides a mechanical downward-pressing type gate valve opening and closing device, which comprises: pressing the shell downwards; the lower pressing sleeve is concentrically arranged in the lower pressing shell and is fixedly connected with the lower pressing shell through a lower pressing shear pin; the lower pressing nipple section variable wire is fixedly connected to the lower end of the lower pressing shell; the gate valve unit comprises an upper short section, a valve plate seat fixedly connected to the lower end of the upper short section and a lower pressing short section arranged in the upper short section, the upper short section is provided with a mounting hole penetrating through the side wall, a gate is mounted in the mounting hole, and the gate is connected with the valve plate seat through a torsion driving assembly; the lower pressing short section is fixedly connected with the upper short section through a first shear pin, the lower pressing shear pin and the first shear pin are sheared through the lower pressing sleeve, the lower pressing short section moves downwards to the bottom of the valve plate seat, the lower pressing sleeve is lifted to the initial position, and therefore the gate plate can rotate under the effect of the torsion driving assembly to close the gate valve unit.

Description

Opening and closing device for mechanical downward-pressing type gate valve
Technical Field
The invention belongs to the technical field of drilling and completion of oil and gas fields, and particularly relates to a mechanical downward pressing type gate valve opening and closing device.
Background
During the drilling and completion operation of oil and gas fields, the problem of downhole overflow is often encountered, and downhole blowout preventers are generally adopted in the prior art for downhole overflow treatment. The downhole blowout preventer is connected with the drilling tool and rotates along with the drilling tool, and the downhole blowout preventer can be matched with a wellhead blowout preventer to treat downhole overflow. The existing packer unit of the downhole blowout preventer adopts two forms of a compression rubber sleeve and an expansion rubber sleeve, and the expansion rubber sleeve is usually subjected to ball-throwing pressure-holding mode to establish pressure-holding conditions underground. However, since a certain delay is required for pitching, the efficiency of handling the downhole overflow problem is low, and the downhole overflow problem cannot be quickly handled.
Disclosure of Invention
In view of the above technical problems, the present invention is directed to a mechanical downward pressing type gate valve opening and closing device, which can establish a pressure-holding condition by a mechanical downward pressing manner to perform packer expansion, so as to rapidly solve the downhole overflow problem.
To this end, according to the present invention, there is provided a mechanical press-down type gate valve opening and closing device comprising: a cylindrical press-down case; the lower pressing sleeve is concentrically arranged in the lower pressing shell and is fixedly connected with the lower pressing shell through a lower pressing shear pin; the lower pressing nipple section variable wire is fixedly connected to the lower end of the lower pressing shell; the gate valve unit is arranged in the lower pressing shell and comprises an upper short section, a valve plate seat fixedly connected to the lower end of the upper short section and a lower pressing short section arranged in the upper short section, the upper short section is provided with a mounting hole penetrating through the side wall, a gate plate is mounted in the mounting hole, and the gate plate is connected with the valve plate seat through a torsion driving assembly; the lower pressing short section is fixedly connected with the upper short section through a first shear pin, the upper end face of the lower pressing short section is in contact with the lower end face of the lower pressing sleeve in an initial state, the lower pressing shear pin and the first shear pin are sheared by mechanically pressing the lower pressing sleeve, the lower pressing short section is made to descend to the bottom of the valve plate seat, the lower pressing sleeve is lifted to an initial position, and the gate plate can be rotated under the action of the torsion driving assembly to close the gate valve unit.
In one embodiment, the torsional drive assembly comprises a valve plate shaft and a torsion spring, and the valve plate is in rotary connection with the valve plate seat through the valve plate shaft and can rotate around the valve plate shaft under the action of the torsion spring.
In one embodiment, the gate valve unit further comprises an outer sleeve arranged in the lower pressing shell, the inner wall of the lower pressing shell is provided with a first shoulder with a downward end face, and the outer sleeve is axially and fixedly installed between the upper end face of the lower pressing short section variable wire and the first shoulder.
In one embodiment, the upper short section is fixedly connected with the outer sleeve through a second shear pin, and the shear value of the second shear pin is larger than that of the first shear pin.
In one embodiment, the inner wall of the lower end of the valve plate seat is provided with a limiting shoulder extending radially inwards, and the pressing short section can descend to the limiting shoulder to form axial limiting.
In one embodiment, the lateral wall of valve plate seat is equipped with the first liquid hole of crossing of a plurality of circumference equipartitions, the lateral wall of pushing down the nipple joint is equipped with the second of a plurality of circumference equipartitions and crosses the liquid hole, the nipple joint is pushed down to sitting when spacing circular bead is last, the second cross the liquid hole with first cross the liquid hole and correspond the intercommunication and form and pass and press the passageway.
In one embodiment, a second shoulder with an upward end face is arranged on the inner wall of the pressing short section variable wire.
In one embodiment, the outer diameter of the valve plate seat is set to be smaller than the inner diameter of the lower pressing short section variable thread, after the valve plate unit is closed, the valve plate unit is suppressed until the pressure of the upper end of the gate plate reaches a preset value, the upper short section shears the second shear pin, the valve plate unit descends to seat on the second shoulder, a gap channel is formed between the valve plate seat and the radial direction of the lower pressing short section variable thread, the gap channel is communicated with the pressure transmission channel, and therefore the upper channel and the lower channel of the gate plate are communicated to form the liquid passing channel again.
In one embodiment, the outer wall of the pressing sleeve is provided with a plurality of transmission keys extending along the axial part, the transmission keys are uniformly distributed in the circumferential direction, the inner wall of the pressing shell is provided with a plurality of transmission key slots, and the pressing sleeve and the pressing shell are in adaptive connection with the transmission key slots through the transmission keys.
In one embodiment, a safety sleeve is fixedly connected to the upper end of the pressing shell, a limiting step with a downward end face is arranged on the inner wall of the upper end of the safety sleeve, a radial protrusion is arranged on the outer wall of the pressing sleeve, and in an initial state, the radial protrusion is in contact with the limiting step to limit the pressing sleeve axially.
Compared with the prior art, the invention has the advantages that:
according to the opening and closing device of the mechanical downward-pressing type gate valve, after overflow is found, a pressure building condition can be established by lowering a drilling tool and adopting a mechanical downward-pressing mode, and then the packer is expanded, so that underground overflow can be quickly treated, the efficiency of treating the underground overflow is greatly improved, and the safety of a wellhead is remarkably enhanced. Meanwhile, torque can be transmitted by adopting a transmission key groove structure. In addition, when needing intraductal circulation, can make the slide valve unit get into through suppressing pressure and push down nipple joint change silk, and then carry out the intraductal circulation to the realization is at the reestablishment circulation channel in the pit, this can show improvement borehole operation efficiency.
Drawings
The invention will now be described with reference to the accompanying drawings.
Fig. 1 shows the structure of a mechanical push-down type gate valve opening and closing device according to the present invention.
Fig. 2 is a cross-sectional view taken along line a-a in fig. 1.
Fig. 3 shows the structure of a gate valve unit in the mechanical push-down type gate valve opening and closing apparatus of fig. 1.
Fig. 4 shows a mounting structure of a torsion spring and a shutter shaft in the shutter valve unit shown in fig. 3.
Fig. 5 and 6 show the closing process and the closing principle of the gate valve unit.
Fig. 7 shows a hold-back state of the opening and closing device of the mechanical push-down type gate valve according to the present invention.
In the present application, the drawings are all schematic and are used only for illustrating the principles of the invention and are not drawn to scale.
Detailed Description
The invention is described below with reference to the accompanying drawings.
In this application, it should be noted that when the mechanical downward-pressing type gate valve opening and closing device according to the present invention is lowered into a wellbore, an end close to a wellhead is defined as an upper end or the like, and an end away from the wellhead is defined as a lower end or the like.
Fig. 1 shows the structure of a mechanically-depressed-type gate valve opening and closing device 100 according to the present invention. As shown in fig. 1, the mechanical push-down type gate valve opening and closing device 100 includes a cylindrical push-down housing 1, a push-down sleeve 2 concentrically arranged in the push-down housing 1, a push-down nipple 5 fixedly connected to a lower end of the push-down housing 1, and a gate valve unit 6 disposed in the push-down housing 1. The upper end of the lower pressing sleeve 2 is used for being connected with a packer or a feeding tool, and the lower end of the lower pressing nipple variable wire 5 is used for being connected with a lower pipe string. The gate valve unit 6 is initially in an open state, and the gate valve unit 6 can be closed in a mechanical downward pressing and upward lifting mode through the downward pressing sleeve 2, so that a sealing condition is formed in the pipe, liquid inlet in the pipe string can increase the pressure in the pipe, and conditions are provided for subsequent packer setting.
As shown in fig. 1, a safety sleeve 3 is fixedly connected to an upper end of the push-down housing 1. In one embodiment, the safety sleeve 3 is screwed into a fixed connection with the push-down housing 1. The inner wall of the upper end of the safety sleeve 3 is provided with a limiting step 31 with an end face facing downwards, the lower end face of the limiting step 31 is opposite to the upper end face of the lower pressing shell 1, and a stroke space is reserved between the axial directions. A radial projection 22 extending radially outward is provided on the outer wall surface of the push-down sleeve 2. The lower pressing sleeve 2 is fixedly connected with the lower pressing shell 1 through a lower pressing shear pin 4, and the upper end face of the radial protrusion 22 is in contact with the lower end face of the limiting step 31 in the initial state. Thereby, the axial limit is formed to the lower pressure sleeve 2 by the contact fit of the limit step 31 of the safety sleeve 3 with the radial protrusion 22 of the lower pressure sleeve 2, thereby preventing the lower pressure sleeve 2 from being separated from the safety sleeve 3. When the push-down shear pin 4 is sheared, the push-down sleeve 2 can move axially relative to the push-down housing 1, and the radial projection 22 moves in the range of the stroke space between the limit step 31 and the upper end face of the push-down housing 1. Thereby, the axial movement of the push-down sleeve 2 is limited by the limit step 31 and the upper end surface of the push-down housing 1, so that the push-down sleeve 2 moves within a certain stroke range.
As shown in fig. 2, according to an embodiment of the present invention, the outer wall surface of the push-down sleeve 2 is provided with a plurality of transmission keys 21 extending radially outward, and the plurality of transmission keys 21 extend axially and are uniformly distributed in the circumferential direction and are located at the lower ends of the radial protrusions 22. Meanwhile, the inner wall of the pressing shell 1 is provided with a plurality of transmission key slots 12, and the transmission keys 21 on the pressing sleeve 2 can be installed in a manner of being matched with the transmission key slots 12 on the pressing shell 1, so that the pressing sleeve 2 and the pressing shell 1 form a transmission key slot structure. From this, can transmit the moment of torsion through pushing down sleeve 2 and pushing down the transmission keyway structure between the casing 1 to transmit for the lower part connecting piece through pushing down nipple joint change silk 5, and then transmit for the lower part pipe cluster.
In addition, in order to ensure the sealing performance between the push-down sleeve 2 and the push-down housing 1, a sealing member may be provided between the connection surface of the push-down sleeve 2 and the push-down housing 1. A seal is preferably provided at the lower end of the push-down shear pin 4.
As shown in fig. 1, a second shoulder 51 with an upward end face is arranged on the inner wall of the pressing nipple variable wire 5. In one embodiment, the pressing nipple variable thread 5 is fixedly connected with the lower end of the pressing shell 1 through threads. And, the upper end face of the lower pressing short section variable wire 5 extends radially inwards, so that an installation step with the end face facing upwards is formed at the joint of the lower pressing short section variable wire 5 and the lower pressing shell 1. The function of the second shoulder 51 and the mounting step will be described below.
In one embodiment, the upper end of the push down sleeve 2 is configured as a tapered connection link, the outer surface of which is provided with threads for connection to a packer or running tool. Similarly, the lower end of the pressing short section variable thread 5 is constructed into a conical connecting buckle, and the outer surface of the conical connecting buckle is provided with threads for connecting other lower pipe strings. The connection structure of the pressing sleeve 2 and the pressing nipple variable wire 5 is convenient and fast to connect, stable and reliable in connection and beneficial to improvement of installation efficiency.
As shown in fig. 3, the gate valve unit 6 includes an upper short section 61, a valve plate seat 62, a lower short section 63, a gate 64, and an outer sleeve 67. The inner wall of the push-down housing 1 is further provided with a first shoulder 11 facing downward, the first shoulder 11 being opposed to the mounting step and forming a mounting space between the mounting shoulder and the mounting step in the axial direction. The outer sleeve 67 is mounted in the mounting space with the upper and lower ends of the outer sleeve 67 contacting the first shoulder 11 and the mounting step, respectively, whereby the outer sleeve 67 forms an axially fixed mounting. The upper short section 61 is fixedly connected with the outer sleeve 67 through the first shear pin 7, and in an initial state, the upper end face of the upper short section 61 is in contact with the first shoulder 11. Push down nipple joint 63 through second shear pin 8 and last nipple joint 61 fixed connection, and under initial condition, push down the up end of nipple joint 63 and push down the lower terminal surface contact of sleeve 2. The shear value of the second shear pin 8 is greater than the shear value of the first shear pin 7.
According to one embodiment of the invention, the lower end of the push-down nipple 63 is fixedly connected with the valve plate seat 62 through a stepped connection joint and threads. The push-down nipple 63 is cylindrical, and a mounting hole is cut in a side wall region of the push-down nipple 63, and preferably, the mounting hole occupies a quarter of the circumference. The mounting hole is used for mounting the shutter 64. As shown in fig. 4, the gate 64 is connected to the gate seat 62 by a torsional drive assembly. The torsion driving assembly includes a valve plate shaft 65 and a torsion spring 66, and the valve plate shaft 65 is disposed along a tangential direction of a circle formed by the outer circumference of the valve plate seat 62. The shutter 64 is rotatably connected to the valve plate seat 62 via a valve plate shaft 65 and is rotatable about the valve plate shaft 65 by a torsion spring 66.
During assembly, the shutter 64 is connected to the valve plate seat 62 via the shutter shaft 65 and the torsion spring 66. After the assembly of the gate valve unit 6 is completed, the gate valve unit 6 is in a closed state under the action of the torsion spring 66, the lower pressing short section 63 is installed from bottom to top to form radial support so as to open the gate 64, at the moment, the torsion spring 66 is in a torsion stress state, and the gate valve unit 6 is in an initial open state.
After the assembly of the gate valve unit 6 is completed, the upper end of the lower compression sleeve 2 is used for connection with a packer or running tool, and the lower end of the lower compression sleeve variable wire 5 is used for connection with a lower string through a connection piece (not shown). The mechanical downward-pressing type gate valve opening and closing device 100 is installed above a neutral point, and when the pipe string is lifted upwards, the weight of the bottom pipe string is borne through the radial bulge 22 of the downward-pressing sleeve 2 and the limiting step 31 of the safety sleeve 3. The first shear pin 7 is subjected only to downward pressure and not to tensile and torsional forces.
According to the invention, as shown in fig. 3, the lower end inner wall of the valve plate seat 62 is provided with a radially inwardly extending stop shoulder 622. The lower pressing short section 63 moves to the limiting shoulder 622 in a mechanical pressing mode, so that the lower end face of the lower pressing short section 63 is seated on the limiting shoulder 622, and axial limiting is formed on the lower pressing short section 63. A plurality of first liquid passing holes 621 which are uniformly distributed in the circumferential direction are formed in the side wall of the valve plate seat 62, and the first liquid passing holes 621 are formed in the axial inner side of the limiting shoulder 622. A plurality of second liquid passing holes 631 which are uniformly distributed in the circumferential direction are formed in the side wall of the pressing nipple 63. When the pressing short section 63 descends to sit on the limit shoulder 622, the second liquid passing hole 631 is correspondingly communicated with the first liquid passing hole 621 to form a pressure transmission channel. The function of the pressure transfer channels will be described below.
According to the actual working process of the mechanical downward-pressing type gate valve opening and closing device 100, firstly, the mechanical downward-pressing type gate valve opening and closing device 100 is connected to the pipe string, the mechanical downward-pressing type gate valve opening and closing device 100 is put into a shaft, the weight of the pipe string is released after the mechanical downward-pressing type gate valve opening and closing device 100 is put into the shaft bottom, so that the downward-pressing sleeve 2 and the downward-pressing shell 1 move relatively, the downward-pressing shear pins 4 and the second shear pins 7 are cut off simultaneously, and the downward-pressing short section 63 moves downwards to the limiting shoulder 622 located at the bottom of the valve plate seat 62. Thereafter, the pipe lifting string moves the lower sleeve 2 upward until the upper end surface of the radial protrusion 22 of the lower sleeve 2 comes into contact with the limit step 31 of the safety sleeve 3 to return to the initial position, which allows the shutter 64 to have a movement space, the shutter 64 rotates by 90 degrees around the shutter shaft 65 by the torsion spring 66, the shutter 64 comes into contact with the valve plate seat 62, and the upper port of the valve plate seat 62 is blocked by the shutter 64, thereby closing the shutter valve unit 6. Therefore, after the gate valve unit 6 is mechanically pressed down to cut the pressing shear pins 4 and the second shear pins 7 and is lifted up again, the gate 64 closes the gate valve unit 6 under the action of the torsion spring 66, so that liquid inlet in the pipe string can increase the pressure in the pipe, and conditions are provided for setting of a subsequent packer. Fig. 5 and 6 show the closing process and principle of the gate valve unit 6.
In one embodiment, the upper end surface of the valve plate seat 62 is vulcanized with rubber, which enables the gate 64 to form an effective seal after contacting the valve plate seat 62, thereby improving the sealing performance of the gate valve unit 6 and enhancing the reliability of the closing pressure-holding performance of the mechanical push-down gate valve opening and closing device 100.
After the valve plate unit 6 is closed, when the pressure of the liquid in the channel at the upper end of the gate plate 64 reaches a preset value through pressure building, the upper short section 61 cuts off the second shear pin 8, and the valve plate unit 6 moves downwards until the lower end face of the valve plate seat 62 is seated on the second shoulder 51 of the lower short section variable wire 5. According to the present invention, the outer diameter of the valve plate seat 62 is set smaller than the inner diameter of the push-down nipple variable wire 5. Thereby, a slit passage 9 is formed between the valve plate seat 62 and the radial direction of the lower pressing short section variable wire 5, the upper end of the slit passage 9 is communicated with the passage at the upper end of the gate plate 64, and the lower end of the slit passage 9 is communicated with the passage at the lower end of the gate plate 64 through a pressure transfer passage, so that a liquid passing passage is formed again inside the mechanical lower pressing type gate valve opening and closing device 100. Thus, the circulation passage can be reestablished in the underground by the mechanical push-down type gate valve opening/closing device 100, and the subsequent construction work can be continued. Fig. 7 is a schematic view of the mechanically-depressed gate valve opening/closing device 100 in a hold-off state, wherein the arrows in fig. 7 indicate the flow path direction of the liquid along the liquid passage.
According to the mechanical downward-pressing type gate valve opening and closing device 100, in the drilling process, after overflow is found, a pressure building condition can be established by lowering a drilling tool and adopting a mechanical downward-pressing mode, and then the packer is expanded, so that underground overflow can be quickly treated, the efficiency of treating the underground overflow is greatly improved, and the safety of a wellhead is obviously enhanced. Meanwhile, torque can be transmitted by adopting a transmission key groove structure. In addition, when needing intraductal circulation, can make the bottom that the push down moves to pressure nipple joint change silk 5 through suppressing pressure to the push gate valve unit 6, and then realize reestablishing circulation passage in the pit, carry out intraductal circulation again to this can show improvement borehole operation efficiency.
Finally, it should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and do not limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing examples, or that equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a machinery pushes down formula slide valve switching device, includes:
a cylindrical press-down case (1);
the pressing sleeve (2) is concentrically arranged in the pressing shell and is fixedly connected with the pressing shell through a pressing shear pin (4);
a lower pressing nipple variable wire (5) fixedly connected to the lower end of the lower pressing shell; and
the gate valve unit (6) is arranged in the lower pressing shell and comprises an upper short section (61), a valve plate seat (62) fixedly connected to the lower end of the upper short section and a lower pressing short section (63) arranged in the upper short section, the upper short section is provided with a mounting hole penetrating through the side wall, a gate plate (64) is mounted in the mounting hole, and the gate plate is connected with the valve plate seat through a torsion driving assembly;
the lower pressing short section is fixedly connected with the upper short section through a first shear pin (7), the upper end face of the lower pressing short section is in contact with the lower end face of the lower pressing sleeve in an initial state, the lower pressing sleeve is mechanically pressed down to shear the lower pressing shear pin and the first shear pin, the lower pressing short section is made to move downwards to the bottom of the valve plate seat, the lower pressing sleeve is lifted to an initial position, and therefore the flashboard can rotate under the effect of the torsion driving assembly to close the gate valve unit.
2. The mechanical push-down type gate valve opening and closing device according to claim 1, wherein the torsion driving assembly includes a valve plate shaft (65) and a torsion spring (66), and the gate is rotatably connected to the valve plate seat through the valve plate shaft and can rotate around the valve plate shaft by the torsion spring.
3. A mechanical push-down gate valve opening and closing device according to claim 1 or 2, wherein the gate valve unit further comprises an outer sleeve (67) disposed inside the push-down housing, the inner wall of the push-down housing is provided with a first shoulder (11) facing downward, and the outer sleeve is axially and fixedly mounted between the upper end surface of the push-down nipple variable wire and the first shoulder.
4. The opening and closing device of the mechanical down-pressing type gate valve according to claim 3, wherein the upper short section is fixedly connected with the outer sleeve through a second shear pin (8), and the shear value of the second shear pin is larger than that of the first shear pin.
5. The opening and closing device of the mechanical push-down type gate valve according to claim 4, wherein the lower end inner wall of the valve seat is provided with a limiting shoulder (622) extending radially inwards, and the push-down short section can descend to the limiting shoulder to form axial limiting.
6. The opening and closing device of a mechanical push-down gate valve according to claim 5, wherein the side wall of the valve seat is provided with a plurality of first liquid passing holes (621) which are uniformly distributed in the circumferential direction, the side wall of the push-down nipple is provided with a plurality of second liquid passing holes (631) which are uniformly distributed in the circumferential direction,
when the pressing short section moves downwards to sit on the limiting shoulder, the second liquid passing hole is correspondingly communicated with the first liquid passing hole to form a pressure transmission channel.
7. The opening and closing device of the mechanical push-down gate valve according to claim 6, wherein a second shoulder (51) with an upward end face is arranged on the inner wall of the push-down nipple variable wire.
8. The mechanical push-down gate valve opening and closing device according to claim 7, wherein an outer diameter of the valve seat is set smaller than an inner diameter of the push-down nipple deformed wire,
after the valve plate unit is closed, the pressure is suppressed until the pressure of the upper end of the flashboard reaches a preset value, the upper short section cuts the second shear pin, the valve plate unit moves downwards to seat on the second shoulder, a gap channel (9) is formed between the valve plate seat and the radial direction of the variable wire of the lower short section, the gap channel is communicated with the pressure transmission channel, and therefore the upper channel and the lower channel of the flashboard are communicated to form the liquid passing channel again.
9. The opening and closing device of the mechanical downward pressing type gate valve according to claim 1, wherein the outer wall of the downward pressing sleeve is provided with a plurality of transmission keys (21) extending along the axial portion, the plurality of transmission keys are uniformly distributed in the circumferential direction, the inner wall of the downward pressing shell is provided with a plurality of transmission key slots (12), and the downward pressing sleeve and the downward pressing shell are connected with the transmission key slots in a matching manner through the transmission keys.
10. The opening and closing device of a mechanical downward-pressing type gate valve according to claim 1, wherein a safety sleeve (3) is fixedly connected to the upper end of the downward-pressing shell, a limiting step (31) with an end face facing downward is arranged on the inner wall of the upper end of the safety sleeve, a radial protrusion (22) is arranged on the outer wall of the downward-pressing sleeve, and in an initial state, the radial protrusion contacts with the limiting step to axially limit the downward-pressing sleeve.
CN202011491201.8A 2020-12-17 2020-12-17 Mechanical downward-pressing gate valve opening and closing device Active CN114645951B (en)

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CN203383772U (en) * 2013-07-05 2014-01-08 新疆华油油气工程有限公司 Packer with safety valve
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