CN106948764B - Connecting device for deep water oil gas test pipe column safety control system - Google Patents

Connecting device for deep water oil gas test pipe column safety control system Download PDF

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Publication number
CN106948764B
CN106948764B CN201710353635.3A CN201710353635A CN106948764B CN 106948764 B CN106948764 B CN 106948764B CN 201710353635 A CN201710353635 A CN 201710353635A CN 106948764 B CN106948764 B CN 106948764B
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Prior art keywords
connector
shuttle valve
pipe column
piston
hole
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CN201710353635.3A
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CN106948764A (en
Inventor
唐洋
李旺
张中根
刘清友
易典学
何玉发
陈志�
安家伟
牟冠男
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Southwest Petroleum University
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Southwest Petroleum University
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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
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/02—Couplings; joints
    • E21B17/021—Devices for subsurface connecting or disconnecting by rotation
    • 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
    • E21B47/00—Survey of boreholes or wells
    • E21B47/001—Survey of boreholes or wells for underwater installation
    • 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 discloses a connecting device of a deep water oil gas test pipe column safety control system, which comprises an upper connector (1), a lower connector (2), an upper pipe column (3), a lower pipe column (4) and a latch hanging ring device; the lower connector (2) is composed of a connector (16) and a base (17) which are connected in sequence; the annular groove (10) is internally provided with a latch lifting ring device and a hinge seat (22) fixed on the upper connector (1), the hinge seat (22) is circumferentially distributed around the axis of the upper connector (1), and the latch lifting ring device comprises a lifting ring main body (23), a curved rod (24), a connecting rod (25), a latch (26), an upper mandrel (27) and a lower mandrel (28). The beneficial effects of the invention are as follows: the latch is directly stressed, so that the connecting device can be connected and disconnected rapidly and reliably; the hydraulic oil of upper portion connector can be smoothly let in the lower part connector through the shuttle valve during the connection, can effectively shutoff hydraulic oil outflow shuttle valve when breaking.

Description

Connecting device for deep water oil gas test pipe column safety control system
Technical Field
The invention relates to the technical field of petroleum and natural gas exploration and development, in particular to a connecting device of a deep water oil gas test pipe column safety control system.
Background
The floating drilling devices such as the semi-submersible drilling platform and the drilling ship of the ocean deepwater drilling completion are in a floating state in the ocean and shake is aggravated along with the change degree of ocean waves or tides, so that the test pipe column is required to be rapidly disconnected through the deepwater oil gas test pipe column connecting device under the emergency conditions such as severe weather and the like, the drilling platform is rapidly removed from the site, and the safety of operators and equipment is further protected; and after the severe condition is recovered to be normal, aligning the connection test pipe column again for operation. At present, the connecting devices used for the tubular columns at home and abroad are connected by adopting a latch, and the latch is weak to directly act in the process of disconnection and connection; the quick connecting shuttle valve device of the hydraulic oil channel has a complex structure and a narrow oil channel; the guiding, positioning and circumferential limiting are unreliable when the upper joint is connected with the lower joint.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a latch which directly bears force and can ensure that a connecting device can be connected and disconnected rapidly and reliably; the connecting device of the deep water oil gas test pipe column safety control system can smoothly lead the hydraulic oil of the upper connector into the lower connector through the shuttle valve during connection, and can effectively block the hydraulic oil from flowing out of the shuttle valve during disconnection.
The aim of the invention is achieved by the following technical scheme: the connecting device comprises an upper connector, a lower connector, an upper pipe column, a lower pipe column and a latch lifting ring device, wherein a piston is sleeved outside the upper connector, a shell is fixedly arranged outside the piston, a conical threaded hole A, an annular inner boss and a straight hole are sequentially formed in the upper connector from top to bottom, the upper pipe column is in threaded connection with the conical threaded hole A, the lower end face of the upper pipe column is pressed against the upper surface of the annular inner boss, an annular hydraulic cavity and an annular groove are formed between the upper connector and the piston, an annular bulge positioned in the annular hydraulic cavity is arranged on the inner wall of the piston, the annular bulge divides the annular hydraulic cavity into an upper cavity and a lower cavity, a flow passage A and a flow passage B are formed in the upper connector, the flow passage A is communicated with the upper cavity, and the flow passage B is communicated with the lower cavity; the lower end surface of the upper connector is provided with an annular downward bulge;
the lower connecting head consists of a connector and a base which are sequentially connected, the connector is inserted in the straight hole, the top end surface of the connector is propped against the lower surface of the annular inner boss, an annular extending platform is arranged at the joint of the base and the connector around the axis of the connector, and a slope A is arranged on the outer wall of the base and positioned below the extending platform; the bottom of the base is provided with a conical threaded hole B communicated with the joint, and the lower pipe column is in threaded connection with the conical threaded hole B; the top surface of the lower connector is also provided with a groove matched with the annular downward bulge;
the ring groove is internally provided with a latch lifting ring device and a hinge seat fixed on the upper connector, the hinge seat is circumferentially distributed around the axis of the upper connector, the latch lifting ring device comprises a lifting ring main body, a curved bar, a connecting rod, latches, an upper mandrel and a lower mandrel, the lifting ring main body is sleeved at the lower end part of the upper connector, a plurality of latches are hinged on the lifting ring main body around the circumferential direction of the lifting ring main body through the lower mandrel, the bottoms of the latches are arc parts, the arc parts are contacted with the upper end surface of the lower connector, a claw of each latch stretches into between a slope A and an extension platform, the upper end part of each latch is hinged with a connecting rod, the other end of each connecting rod is hinged with a curved bar, the other end of each curved bar is hinged on the inner wall of a piston, an arc groove is formed in each curved bar, and the upper mandrel is fixed on the hinge seat and penetrates through the arc groove;
the bottom surface of the upper connector and the top surface of the base of the lower connector are respectively provided with a mutually communicated stepped hole, an upper shuttle valve is arranged in the stepped hole positioned above, and a lower shuttle valve is arranged in the stepped hole positioned below; and an oil inlet channel is further formed in the upper connector and is connected with the upper shuttle valve, and an oil outlet channel is formed in the lower connector and is connected with the lower shuttle valve.
The upper pipe column is communicated with the lower pipe column.
The side wall of the upper connector is provided with a radial hole.
The top of upper portion connector be connected with supplementary unblock bolt and supplementary unblock bail.
The top of piston be provided with the draw-in groove, supplementary unblock bolt pass through supplementary unblock bail, radial hole and its lower tip inserts in the draw-in groove.
The structure of the upper shuttle valve is the same as that of the lower shuttle valve, the upper shuttle valve comprises a straight rod, a shuttle valve piston, a valve body, a shuttle valve cover and a spring in a compressed state, the valve body is fixedly arranged in a large hole of a step hole, the shuttle valve piston and the spring are arranged in the valve body, one end of the spring is propped against the bottom of the valve body, the other end of the spring is propped against the shuttle valve piston, the shuttle valve cover is arranged in the small hole of the step hole, and the straight rod sequentially penetrates through the shuttle valve piston, the spring and the shuttle valve cover from bottom to top and is propped against the bottom of the step hole.
The valve bodies of the upper shuttle valve and the lower shuttle valve are respectively provided with an oil passing hole, and the oil passing holes of the upper shuttle valve are positioned below the shuttle valve piston; and the oil passing hole of the lower shuttle valve is positioned above the shuttle valve piston.
The lower end part of the straight rod of the upper shuttle valve is propped against the top of the shuttle valve piston of the lower shuttle valve.
The oil inlet channel is communicated with the oil passing hole of the upper shuttle valve; the oil outlet channel is communicated with the oil passing hole of the lower shuttle valve.
The upper end of the piston is in threaded connection with the upper end of the shell.
The invention has the following advantages: the hydraulic oil of the upper connector can be smoothly led into the lower connector through the shuttle valve, and the pipe column is rapidly and accurately connected and tightly sealed.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is an enlarged view of section I of FIG. 1;
FIG. 3 is an enlarged view of section II of FIG. 1;
FIG. 4 is a schematic view of the structure of the upper connector;
fig. 5 is a front cross-sectional view of the lower connector;
FIG. 6 is a schematic illustration of the attachment of the bail body to the latch;
FIG. 7 is a schematic diagram of the structure of the upper and lower shuttle valves after the upper and lower connectors are separated;
FIG. 8 is a schematic view of the structure of the lower connector;
FIG. 9 is a schematic view of the housing before assembly with the lower connector;
in the figure, 1-upper connector, 2-lower connector, 3-upper tubular column, 4-lower tubular column, 5-piston, 6-housing, 7-conical threaded hole A, 8-annular inner boss, 9-straight hole, 10-annular groove, 11-annular boss, 12-upper chamber, 13-lower chamber, 14-runner A, 15-runner B, 16-connector, 17-base, 18-extension platform, 19-slope A, 21-annular lower boss, 22-hinge seat, 23-hoist ring body, 24-curved lever, 25-connecting rod, 26-latch, 27-upper spindle, 28-lower spindle, 29-circular arc groove, 30-stepped hole, 31-upper shuttle valve, 32-lower shuttle valve, 33-oil outlet channel, 34-radial hole, 35-auxiliary unlocking bolt, 36-straight rod, 37-shuttle valve piston, 38-valve body, 39-shuttle valve cover, 40-spring, 41-passing oil hole, 42-hooking claw, 43-conical threaded hole B, 44-groove, 45-auxiliary unlocking lifting ring, 46-upper end surface.
Detailed Description
The invention is further described below with reference to the accompanying drawings, the scope of the invention not being limited to the following:
as shown in fig. 1-9, a connecting device of a deep water oil gas testing pipe column safety control system comprises an upper connector 1, a lower connector 2, an upper pipe column 3, a lower pipe column 4 and a latch hanging ring device, wherein a piston 5 is sleeved outside the upper connector 1, a shell 6 is fixedly arranged outside the piston 5, a conical threaded hole A7, an annular inner boss 8 and a straight hole 9 are sequentially formed in the upper connector 1 from top to bottom, the upper pipe column 3 is in threaded connection with the conical threaded hole A7, the lower end face of the upper pipe column is abutted against the upper surface of the annular inner boss 8, an annular hydraulic cavity and an annular groove 10 are formed between the upper connector 1 and the piston 5, an annular bulge 11 positioned in the annular hydraulic cavity is arranged on the inner wall of the piston 5, the annular bulge 11 divides the annular hydraulic cavity into an upper cavity 12 and a lower cavity 13, a flow passage A14 and a flow passage B15 are formed in the upper connector 1, the flow passage A14 is communicated with the upper cavity 12, and the flow passage B15 is communicated with the lower cavity 13; the lower end surface of the upper connector 1 is provided with an annular lower bulge 21; the upper chamber 12 and the lower chamber 13 are both annular.
The lower connector 2 is composed of a connector 16 and a base 17 which are sequentially connected, wherein the connector 16 is inserted into the straight hole 9, the top end surface of the connector is propped against the lower surface of the annular inner boss 8, an annular extension platform 18 is arranged at the joint of the base 17 and the connector 16 around the axis of the connector 16, and a slope A19 is arranged on the outer wall of the base 17 and positioned below the extension platform 18; the bottom of the base 17 is provided with a conical threaded hole B43 communicated with the joint 16, and the lower pipe column 4 is in threaded connection with the conical threaded hole B43; the top surface of the lower connector 2 is also provided with a groove 44 matched with the annular downward bulge 21;
the ring groove 10 is internally provided with a latch lifting ring device and a hinge seat 22 fixed on the upper connector 1, the hinge seat 22 is circumferentially distributed around the axis of the upper connector 1, the latch lifting ring device comprises a lifting ring main body 23, a curved rod 24, a connecting rod 25, a latch 26, an upper mandrel 27 and a lower mandrel 28, the lifting ring main body 23 is sleeved at the lower end part of the upper connector 1, the lifting ring main body 23 is hinged with a plurality of latches 26 around the circumferential direction of the lifting ring main body 23 through the lower mandrel 28, the bottom of each latch 26 is an arc part, the arc part is contacted with the upper end surface 46 of the lower connector, a hook claw 42 of each latch 26 extends between a slope A19 and an extension platform 18, the upper end part of each latch 26 is hinged with a connecting rod 25, the other end of each connecting rod 25 is hinged with a curved rod 24, the other end of each curved rod 24 is hinged on the inner wall of a piston 5, an arc groove 29 is formed in each curved rod 24, and the upper mandrel 27 is fixed on the hinge seat 22 and penetrates through the arc groove 29;
the bottom surface of the upper connector 1 and the top surface of the base 17 of the lower connector 2 are respectively provided with a mutually communicated stepped hole 30, an upper shuttle valve 31 is arranged in the stepped hole 30 positioned above, and a lower shuttle valve 32 is arranged in the stepped hole 30 positioned below; an oil inlet channel is further formed in the upper connector 1 and is connected with the upper shuttle valve 31, an oil outlet channel 33 is formed in the lower connector 2, and the oil outlet channel 33 is connected with the lower shuttle valve 32.
The upper pipe column 3 is communicated with the lower pipe column 4, radial holes 34 are formed in the side wall of the upper connector 1, and an auxiliary unlocking bolt 35 and an auxiliary unlocking lifting ring 45 are connected to the top of the upper connector 1. The top of the piston 5 is provided with a clamping groove, the auxiliary unlocking bolt 35 penetrates through the auxiliary unlocking lifting ring 45 and the radial hole 34, and the lower end part of the auxiliary unlocking lifting ring is inserted into the clamping groove.
The structure of the upper shuttle valve 31 and the lower shuttle valve 32 is the same, the upper shuttle valve 31 comprises a straight rod 36, a shuttle valve piston 37, a valve body 38, a shuttle valve cover 39 and a spring 40 in a compressed state, the valve body 38 is fixedly arranged in a large hole of the stepped hole 30, the shuttle valve piston 37 and the spring 40 are arranged in the valve body 38, one end of the spring 40 is propped against the bottom of the valve body 38, the other end of the spring 40 is propped against the shuttle valve piston 37, the shuttle valve cover 39 is arranged in a small hole of the stepped hole 30, and the straight rod 36 sequentially penetrates through the shuttle valve piston 37, the spring 40 and the shuttle valve cover 39 from bottom to top and is propped against the bottom of the stepped hole 30.
The valve bodies 38 of the upper shuttle valve 31 and the lower shuttle valve 32 are respectively provided with an oil passing hole 41, and the oil passing hole 41 of the upper shuttle valve 31 is positioned below the shuttle valve piston 37; the oil passing hole 41 of the lower shuttle valve 32 is positioned above the shuttle valve piston 37.
The lower end part of the straight rod 36 of the upper shuttle valve 31 is propped against the top of the shuttle valve piston 37 of the lower shuttle valve 32; the oil inlet channel is communicated with the oil passing hole 41 of the upper shuttle valve 31; the oil outlet passage 33 communicates with the oil passing hole 41 of the lower shuttle valve 32. The upper end of the piston 5 is in threaded connection with the upper end of the housing 6. The top of the straight rod 36 of the lower shuttle valve 32 is in threaded connection with the shuttle valve piston 37 of the lower shuttle valve 32.
The working process of the invention is as follows: as shown in fig. 1, in the process of connecting the upper pipe column 3 and the lower pipe column 4, firstly, the annular downward bulge 21 on the lower end surface of the upper connector is aligned with the groove 44 of the lower connector 2 to play a role of circumferential limitation, then hydraulic oil is introduced into the flow channel a14 of the upper connector 1 of the upper pipe column 3, the hydraulic oil enters the upper chamber 12, the hydraulic oil acts on the upper surface of the annular bulge 11, the piston 5 moves downwards, the hinge point of the curved rod 24 and the piston 5 moves downwards, the circular arc groove 29 is limited by the upper mandrel 27, the connecting rod 25 moves upwards, the connecting rod 25 drives the latch 26 to rotate around the lower mandrel 28, and the hook claw 42 stretches into between the slope a19 and the extension platform 18, so that the quick connection of the upper connector 1 and the lower connector 2 is realized. When hydraulic pressure is to be delivered to the lower connector 2, hydraulic oil is delivered to the safety valve connected to the lower connector 2, hydraulic oil is introduced into the oil inlet channel, and hydraulic oil sequentially passes through the oil passing hole 41 of the upper shuttle valve 31, the valve body 38 of the lower shuttle valve 32, the oil passing hole 41 of the lower shuttle valve 32, and the oil outlet channel 33 to enter the safety valve connected to the lower connector 2 to provide hydraulic pressure.
When the upper connector 1 is separated from the lower connector 2, hydraulic oil is introduced into the flow channel B15, the hydraulic oil enters the lower chamber 13, the hydraulic oil acts on the lower surface of the annular protrusion 11, the piston 5 moves upwards, the hinge point of the curved rod 24 and the piston 5 moves upwards, the connecting rod 25 moves downwards, the connecting rod 25 drives the latch 26 to rotate reversely around the lower mandrel 28, and the hook claw 42 withdraws from between the slope A19 and the extension platform 18, so that the upper connector 1 and the lower connector 2 are disconnected rapidly. After the disconnection, as shown in fig. 7, at the moment when the upper shuttle valve 31 is separated from the lower shuttle valve 32, the spring 40 in a compressed state in the upper shuttle valve 31 pushes the shuttle valve piston 37 of the upper shuttle valve 31 to move downward under the restoring force, the shuttle valve piston 37 moves below the oil passing hole 41 of the upper shuttle valve 31, and the shuttle valve cover 39 is restricted by the valve body 38; and the spring 40 in a compressed state in the lower shuttle valve 32 pushes the shuttle valve piston 37 of the lower shuttle valve 32 to move upwards under the restoring force, the shuttle valve piston 37 moves above the oil passing hole 41 of the lower shuttle valve 32, and the shuttle valve cover 39 is limited by the valve body 38, thereby realizing the effect of blocking the flow of hydraulic oil into seawater to pollute the environment.

Claims (5)

1. A deep water oil gas test tubular column safety control system connecting device is characterized in that: the hydraulic lock comprises an upper connector (1), a lower connector (2), an upper pipe column (3), a lower pipe column (4) and a latch lifting ring device, wherein a piston (5) is sleeved outside the upper connector (1), a shell (6) is fixedly arranged outside the piston (5), a conical threaded hole A (7), an annular inner boss (8) and a straight hole (9) are sequentially formed in the upper connector (1) from top to bottom, the upper pipe column (3) is in threaded connection with the conical threaded hole A (7) and the lower end face of the upper pipe column is abutted against the upper surface of the annular inner boss (8), an annular hydraulic cavity and an annular groove (10) are formed between the upper connector (1) and the piston (5), an annular protrusion (11) positioned in the annular hydraulic cavity is arranged on the inner wall of the piston (5), the annular protrusion (11) divides the annular hydraulic cavity into an upper cavity (12) and a lower cavity (13), a flow passage A (14) and a flow passage B (15) are formed in the upper connector (1), the flow passage A (14) is communicated with the upper cavity (12), and the lower end face of the upper connector (1) is communicated with the lower end face of the annular protrusion (21);
the lower connector (2) is composed of a connector (16) and a base (17) which are sequentially connected, the connector (16) is inserted into the straight hole (9) and the top end surface of the connector is propped against the lower surface of the annular inner boss (8), an annular extending platform (18) is arranged at the joint of the base (17) and the connector (16) around the axis of the connector (16), and a slope A (19) is arranged on the outer wall of the base (17) and positioned below the extending platform (18); the bottom of the base (17) is provided with a conical threaded hole B (43) communicated with the joint (16), and the lower pipe column (4) is in threaded connection with the conical threaded hole B (43); the top surface of the lower connector (2) is also provided with a groove (44) matched with the annular lower bulge (21): the ring groove (10) is internally provided with a latch lifting ring device and a hinge seat (22) fixed on the upper connector (1), the hinge seat (22) is circumferentially distributed around the axis of the upper connector (1), the latch lifting ring device comprises a lifting ring main body (23), a curved rod (24), a connecting rod (25), a latch (26), an upper mandrel (27) and a lower mandrel (28), the lifting ring main body (23) is sleeved at the lower end part of the upper connector (1), the lifting ring main body (23) is hinged with a plurality of latches (26) around the circumferential direction of the lifting ring main body (23) through the lower mandrel (28), the bottom of the latches (26) is an arc part, the arc part is contacted with the upper end surface (46) of the lower connector (2), a hook claw (42) of the latches (26) stretches into a position between a slope A (19) and an extension platform (18), the upper end part of each latch (26) is hinged with a connecting rod (25), the other end of each connecting rod (25) is hinged with a curved rod (24), the other end of each curved rod (24) is hinged on the inner wall of a piston (5), a groove (29) is formed in each curved rod (24), and the upper mandrel (27) is fixed on the corresponding to the corresponding hinge seat (22);
the bottom surface of the upper connector (1) and the top surface of the base (17) of the lower connector (2) are respectively provided with a mutually communicated stepped hole (30), an upper shuttle valve (31) is arranged in the stepped hole (30) positioned above, and a lower shuttle valve (32) is arranged in the stepped hole (30) positioned below; an oil inlet channel is further formed in the upper connector (1), the oil inlet channel is connected with the upper shuttle valve (31), an oil outlet channel (33) is formed in the lower connector (2), and the oil outlet channel (33) is connected with the lower shuttle valve (32);
the upper pipe column (3) is communicated with the lower pipe column (4), radial holes (34) are formed in the side wall of the upper connector (1), an auxiliary unlocking bolt (35) and an auxiliary unlocking lifting ring (45) are connected to the top of the upper connector (1), a clamping groove is formed in the top of the piston (5), and the auxiliary unlocking bolt (35) penetrates through the auxiliary unlocking lifting ring (45), the radial holes (34) and the lower end portion of the auxiliary unlocking bolt is inserted into the clamping groove.
2. The deepwater oil and gas test pipe column safety control system connecting device according to claim 1, wherein: the structure of the upper shuttle valve (31) is the same as that of the lower shuttle valve (32), the upper shuttle valve (31) comprises a straight rod (36), a shuttle valve piston (37), a valve body (38), a shuttle valve cover (39) and a spring (40) in a compressed state, the valve body (38) is fixedly arranged in a large hole of the stepped hole (30), the shuttle valve piston (37) and the spring (40) are arranged in the valve body (38), one end of the spring (40) is propped against the bottom of the valve body (38), the other end of the spring (40) is propped against the shuttle valve piston (37), the shuttle valve cover (39) is arranged in the small hole of the stepped hole (30), and the straight rod (36) sequentially penetrates through the shuttle valve piston (37), the spring (40) and the shuttle valve cover (39) from bottom to top and is propped against the bottom of the stepped hole (30).
3. The deepwater oil and gas test pipe column safety control system connecting device according to claim 2, wherein: the valve bodies (38) of the upper shuttle valve (31) and the lower shuttle valve (32) are respectively provided with an oil passing hole (41), and the oil passing holes (41) of the upper shuttle valve (31) are positioned below the shuttle valve piston (37); the oil passing hole (41) of the lower shuttle valve (32) is positioned above the shuttle valve piston (37), and the lower end part of the straight rod (36) of the upper shuttle valve (31) is propped against the top of the shuttle valve piston (37) of the lower shuttle valve (32).
4. The deepwater oil and gas test pipe column safety control system connecting device according to claim 1, wherein: the oil inlet channel is communicated with an oil passing hole (41) of the upper shuttle valve (31); the oil outlet channel (33) is communicated with the oil passing hole (41) of the lower shuttle valve (32).
5. The deepwater oil and gas test pipe column safety control system connecting device according to claim 1, wherein: the upper end part of the piston (5) is in threaded connection with the upper end part of the shell (6).
CN201710353635.3A 2017-05-18 2017-05-18 Connecting device for deep water oil gas test pipe column safety control system Active CN106948764B (en)

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CN113818865B (en) * 2021-09-18 2023-06-02 西安洛科电子科技股份有限公司 Intelligent separate-layer water injection testing device and application method thereof

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GB201006750D0 (en) * 2010-04-22 2010-06-09 Sondex Wireline Ltd Downhole releasable connector
CN204627443U (en) * 2015-04-02 2015-09-09 中国石油化工股份有限公司 Helicoid hydraulic motor testing pressure of well head joint

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