CN113638734B - Underwater test tree - Google Patents
Underwater test tree Download PDFInfo
- Publication number
- CN113638734B CN113638734B CN202110944300.5A CN202110944300A CN113638734B CN 113638734 B CN113638734 B CN 113638734B CN 202110944300 A CN202110944300 A CN 202110944300A CN 113638734 B CN113638734 B CN 113638734B
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- CN
- China
- Prior art keywords
- latch
- ball
- piston
- sleeved
- ring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000012360 testing method Methods 0.000 title claims abstract description 48
- 239000013043 chemical agent Substances 0.000 claims abstract description 20
- 238000000926 separation method Methods 0.000 claims abstract description 4
- 210000000078 claw Anatomy 0.000 claims description 46
- 238000002347 injection Methods 0.000 claims description 14
- 239000007924 injection Substances 0.000 claims description 14
- 239000000126 substance Substances 0.000 claims description 9
- 230000001154 acute effect Effects 0.000 claims description 3
- 230000007246 mechanism Effects 0.000 abstract description 9
- 238000005086 pumping Methods 0.000 abstract description 4
- 238000010008 shearing Methods 0.000 abstract description 4
- 238000012954 risk control Methods 0.000 abstract description 3
- 239000003208 petroleum Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 11
- 230000008569 process Effects 0.000 description 10
- 230000009471 action Effects 0.000 description 6
- 238000003825 pressing Methods 0.000 description 6
- 238000007789 sealing Methods 0.000 description 5
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000005553 drilling Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
Classifications
-
- 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
- E21B47/00—Survey of boreholes or wells
- E21B47/001—Survey of boreholes or wells for underwater installation
-
- 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
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
- E21B23/04—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells operated by fluid means, e.g. actuated by explosion
- E21B23/042—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells operated by fluid means, e.g. actuated by explosion using a single piston or multiple mechanically interconnected pistons
-
- 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
-
- 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
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
- E21B41/0007—Equipment or details not covered by groups E21B15/00 - E21B40/00 for underwater installations
Landscapes
- 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)
- Geophysics (AREA)
- Safety Valves (AREA)
- Check Valves (AREA)
Abstract
The invention belongs to the technical field of marine deepwater testing related petroleum equipment, and relates to an underwater test tree, which comprises a latch part; one end of the body part is sleeved in the latch part; the latch connecting structure is sleeved between the latch part and the body part, one end of the latch connecting structure is connected with the latch part, and the other end of the latch connecting structure is clamped with the body part; and the control structure is arranged on the latch part and the body part and is used for controlling the latch connecting structure to act so as to realize the connection or separation of the latch part and the body part. The invention has reliable structure, double fault protection mechanism and controllable disconnection and connection functions, the second ball valve has the functions of shearing a continuous oil pipe or a cable, injecting chemical agents, mechanically unlatching and pumping through, has complete functions, extremely strong risk control performance and strong practicability, and is worthy of popularization.
Description
Technical Field
The invention belongs to the technical field of marine deepwater testing related petroleum equipment, and particularly relates to an underwater test tree.
Background
In deepwater test operation, a floating structure such as a semi-submersible drilling platform or a drilling ship is generally adopted, and due to the influence of wind, waves and currents, the platform can generate floating body movements such as pitching and rolling, and a deepwater test pipe column connected with the floating body can also be seriously influenced, so that if special sea conditions such as typhoons or tides are met in the test process, the test pipe column is required to be disconnected immediately, and the platform is removed from a wellhead position. For the deep water oil gas exploration area in south China sea, the environment is worse than that of other deep sea oil areas in the world, the testing difficulty is higher, the space of the floating platform is narrow, equipment and personnel are intensive, and once blowout occurs or oil gas flow introduced into the platform leaks in the testing process, major accidents such as explosion, fire, poisoning and environmental pollution can be caused. Therefore, the deepwater oil gas test has extremely high requirements on risk control, and in an emergency situation, a critical device-an underwater test tree which is arranged on the test pipe column is required to be adopted, so that the test pipe column can be rapidly disconnected in the emergency situation, high-pressure oil gas in a well is plugged, rapid evacuation of a drilling platform is realized, and safety of personnel, equipment and environment in the deepwater test process is ensured.
The underwater test tree is one of the most typical and most critical equipment in a deepwater oil and gas test system, and is mainly applied to stratum test and oil test operation on a deepwater floating platform and is also frequently applied to shaft drainage alternate injection, underwater maintenance and other workover operations. The underwater test tree plays a role in safety protection, whether applied to test operations or well workover operations, and is therefore also called an underwater safety valve.
At present, an underwater test tree used in deepwater test operation has a complex structure and poor reliability, so that it is necessary to provide an underwater test tree with a novel structure.
Disclosure of Invention
In view of the above, the present invention provides an underwater test tree to solve the above-mentioned technical problems.
The technical scheme of the invention is as follows:
An underwater test tree comprising:
a latch portion;
one end of the body part is sleeved in the latch part;
The latch connecting structure is sleeved between the latch part and the body part, one end of the latch connecting structure is connected with the latch part, and the other end of the latch connecting structure is clamped with the body part;
and the control structure is arranged on the latch part and the body part and is used for controlling the latch connecting structure to act so as to realize the connection or separation of the latch part and the body part.
Further, the latch part comprises a fishing joint, a latch ring, a latch outer barrel and a latch torque outer barrel which are coaxially sleeved in sequence; the latch outer cylinder is sleeved with a latch body sleeve, the latch body sleeve and one side of the latch ring, which is away from the fishing joint, are clamped, a latch piston is sleeved between the latch body sleeve and the latch outer cylinder, a latch auxiliary piston is sleeved in the latch piston, the latch auxiliary piston is positioned at one side, which is close to the latch body sleeve, a latch body is fixedly connected in the latch body sleeve, a latch piston check ring is sleeved between the latch body and the latch piston, the latch piston check ring is fixed with the latch body, a lifting valve sleeve and a lifting valve sleeve check ring are coaxially sleeved in the latch body, the lifting valve sleeve and the lifting valve sleeve check ring are positioned at one side, which is away from the fishing joint, of the latch body, and the lifting valve sleeve check ring and one side, which is away from the fishing joint, are clamped, are fixed with the latch body.
Further, the body portion is including the lift valve cap, go up urceolus, urceolus and the lower joint that coaxial suit set up in proper order, go up urceolus and including coaxial suit fixed first drum, first cone and second drum in proper order, the diameter of second drum is bigger than the diameter of first drum, be provided with the cartridge structure that matches with the latch connection structure between first drum and the first cone, the one end that the second drum was kept away from to first drum with it is fixed to promote the valve cap, the suit is gone up on the urceolus and is promoted the valve housing, the lift valve housing is located between first drum and the lift valve housing, establish ties in the space that first cone, second drum, urceolus and lower joint enclose and be provided with first ball valve and the second ball valve that is used for controlling the switching well, one side that first is close to the joint sets up.
Further, the clamping structure comprises annular special-shaped surface clamping rings, wherein two ends of the annular special-shaped surface clamping rings are respectively fixed with the first cylinder and the first conical cylinder, the outer contour line of each annular special-shaped surface clamping ring comprises a first oblique line, a first straight line segment, a second oblique line and a second straight line segment which are sequentially connected, the first oblique line is close to one side of the salvaging joint, an acute angle is formed between the first oblique line and the second oblique line, and the diameter of an annular ring formed around the first straight line segment is larger than that of an annular ring formed around the second straight line segment.
Further, the latch connection structure includes:
the lower seat ring of the latch claw is sleeved on the annular special-shaped surface clamping ring and is fixedly sleeved with the annular surface where the first oblique line section is positioned;
the latch claw ring is sleeved outside the latch claw lower seat ring and hinged with the latch claw lower seat ring;
The latch claws are uniformly distributed on the latch claw ring and fixed with the latch claw ring, and are clamped in the annular special-shaped surface clamping ring.
Further, the first ball valve includes:
the first ball seat is sleeved and fixed in the upper outer cylinder;
the first ball piston is sleeved on the outer side of the first ball seat;
The lower seat ring is sleeved in the first ball piston and is positioned at one end deviating from the first ball seat, one end, close to the first ball seat, of the lower seat ring is sleeved and fixed with a first ball support, first cambered surfaces are respectively formed on the surfaces, opposite to the first ball seat, of the first ball support, two opposite first cambered surfaces form a first clamping groove structure, and a first ball is clamped in the first clamping groove structure; two first support arms are uniformly distributed on the first sphere support, the tail ends of the first support arms are second cambered surfaces, the second cambered surfaces are abutted with rotating shafts of the first spheres to realize the positioning of the circle centers of the first spheres, first groove bodies which are eccentrically arranged are formed in the surfaces, close to the rotating shafts, of the first spheres, first push rods are clamped in the first groove bodies, and the first push rods are fixed with first sphere pistons; a first elastic piece is sleeved between the lower seat ring and the first sphere piston, and a plurality of second elastic pieces are uniformly distributed between the lower seat ring and the first sphere support;
One end of the first channel is communicated with the external pressurizing equipment, and the other end of the first channel is communicated with a first annular pressurizing cavity between the upper outer cylinder and the first ball piston through the latch body and the upper outer cylinder and is used for pressurizing the first annular pressurizing cavity so as to push the first ball piston to move and open the first ball valve;
And one end of the second channel is communicated with the external pressurizing equipment, and the other end of the second channel is communicated with a second annular pressurizing cavity among the upper outer cylinder, the lower seat ring and the first ball piston through the latch body and the upper outer cylinder and is used for pressurizing the second annular pressurizing cavity so as to push the first ball piston to reversely move and close the first ball valve.
Further, the second ball valve includes:
The second ball seat is sleeved and fixed in the lower seat ring;
The second ball piston is sleeved outside the second ball seat;
the lower spring bracket is sleeved in the second ball piston and is positioned at one end deviating from the second ball seat, one end, close to the second ball seat, of the lower spring bracket is sleeved and fixed with a second ball bracket, third cambered surfaces are respectively formed on the surfaces, opposite to the second ball seat, of the second ball bracket, two opposite third cambered surfaces form a second clamping groove structure, and a second ball is clamped in the second clamping groove structure; the second sphere is provided with a cutting edge for cutting off a continuous oil pipe or a cable; two second support arms are uniformly distributed on the second sphere support, the tail end of each second support arm is a fourth cambered surface, the fourth cambered surface is abutted with a rotating shaft of the second sphere to realize the positioning of the circle center of the second sphere, a second groove body which is eccentrically arranged is formed in the surface, close to the rotating shaft, of the second sphere, a second push rod is clamped in the second groove body, and the second push rod is fixed with a second sphere piston; and a third elastic piece is sleeved between the lower spring bracket and the second sphere piston, and a plurality of fourth elastic pieces are uniformly distributed between the lower spring bracket and the second sphere bracket.
And one end of the third channel is communicated with the external pressurizing equipment, and the other end of the third channel is communicated with a third annular pressurizing cavity between the lower outer cylinder and the second ball piston through the latch body, the upper outer cylinder and the lower outer cylinder and is used for pressurizing the third annular pressurizing cavity so as to push the second ball piston to move and open the second ball valve.
And one end of the fourth channel is communicated with the external pressurizing equipment, and the other end of the fourth channel is communicated with a fourth annular pressurizing cavity among the lower outer cylinder, the lower spring bracket and the second ball piston through the latch body, the upper outer cylinder and the lower outer cylinder and is used for pressurizing the fourth annular pressurizing cavity so as to push the second ball piston to reversely move and close the second ball valve.
Further, the control structure includes:
a fifth channel, which is arranged on the latch body, one end of which is communicated with an external pressurizing device, and the other end of which is communicated with a fifth annular pressurizing cavity between the latch piston and the latch piston retainer ring, and is used for pressurizing the fifth annular pressurizing cavity so as to push the latch piston to move, and opening a latch connecting structure to separate the latch part from the body part;
And a sixth channel, one end of which is communicated with the external pressurizing device, and the other end of which is communicated with a sixth annular pressurizing cavity among the latch body sleeve, the latch piston and the latch auxiliary piston through the latch body, and the sixth channel is used for pressurizing the sixth annular pressurizing cavity so as to push the latch piston to move and connect the latch part and the body part.
Further, the first chemical injection part is also included, including:
a seventh channel which is a mounting hole formed on one side of the latch body close to the fishing joint;
The check valve assembly is arranged in the seventh channel and comprises two check valves which are sequentially connected in series, and the input end of each check valve is connected with the chemical agent output end of the outside and is used for injecting chemical agent between the latch body and the lifting valve cap.
Further, the second chemical injection part is also included, including:
and one end of the eighth channel is connected with the chemical agent output end of the external device, and the other end of the eighth channel is communicated with the lower connector and the inner cavity of the lower connector through the latch body, the upper outer cylinder and the lower outer cylinder.
Compared with the prior art, the underwater test tree provided by the invention has the advantages of reliable structure, double fault protection mechanisms and controllable disconnection and connection functions, and the second ball valve has the functions of cutting a continuous oil pipe or a cable, injecting a chemical agent, mechanically unlatching and pumping through, is complete in function, has extremely strong risk control performance and strong practicability, and is worthy of popularization.
Drawings
FIG. 1 is a cross-sectional view 1 of a body structure of the present invention;
FIG. 2 is a cross-sectional view 2 of the body structure of the present invention;
FIG. 3 is a cross-sectional view of the body structure of the present invention, FIG. 3;
FIG. 4 is a cross-sectional view of the body structure of the present invention, FIG. 4;
FIG. 5 is a left side view of the body structure of the present invention;
FIG. 6 is a cross-sectional view 5 of the body structure of the present invention;
FIG. 7 is a cross-sectional view 6 of the body structure of the present invention;
FIG. 8 is a cross-sectional view 7 of the body structure of the present invention;
FIG. 9 is a schematic illustration of the connection of a partial structure of the present invention 1;
FIG. 10 is a schematic view of the connection of the partial structure of the present invention 2;
FIG. 11 is a partial block diagram of the present invention of FIG. 1;
Fig. 12 is a partial structural view of the present invention, fig. 2.
Detailed Description
The present invention provides an underwater test tree, and is described below with reference to the schematic structural diagrams of fig. 1 to 12.
Examples
The invention provides an underwater test tree, referring to fig. 1, comprising a latch part and a body part, wherein one end of the body part is sleeved in the latch part, a latch connecting structure is sleeved between the latch part and the body part, one end of the latch connecting structure is connected with the latch part, and the other end of the latch connecting structure is clamped with the body part; the control structure is used for controlling the latch connecting structure to act so as to realize the connection or separation of the latch part and the body part.
Further, the latch portion has a structure specifically including:
The fishing joint 1, the latch ring 3, the latch outer cylinder 6 and the latch torque outer cylinder 10 are coaxially sleeved in sequence, and the fishing joint 1 and the latch ring 3 are connected through threads.
The latch outer cylinder 6 is sleeved with the latch body sleeve 4, the latch body sleeve 4 and the latch ring 3 are clamped at one side away from the fishing joint 1, a latch piston 7 is sleeved between the latch body sleeve 4 and the latch outer cylinder 6, a latch auxiliary piston 11 is sleeved in the latch piston 7, the latch auxiliary piston 11 is positioned at one side close to the latch body sleeve 4, the latch body 2 is fixedly connected in the latch body sleeve 4, a latch piston check ring 13 is sleeved between the latch body 2 and the latch piston 7, the latch piston check ring 13 is fixed with the latch body 2, a lifting valve sleeve 8 and a lifting valve sleeve check ring 14 are coaxially sleeved in the latch body 2, the lifting valve sleeve 8 and the lifting valve sleeve check ring 14 are positioned at one side of the latch body 2 away from the fishing joint 1, the lifting valve sleeve check ring 14 and the lifting valve sleeve 8 are clamped at one side away from the fishing joint 1, and the lifting valve sleeve 14 is fixed with the latch body 2.
Further, the structure of the body portion specifically includes:
The lifting valve cap 5, the upper outer barrel 12, the lower outer barrel 27 and the lower connector 31 are coaxially sleeved in sequence, the upper outer barrel 12 comprises a first cylinder, a first conical cylinder and a second cylinder which are coaxially sleeved in sequence and fixed, the diameter of the second cylinder is larger than that of the first cylinder, a clamping structure matched with a latch connection structure is arranged between the first cylinder and the first conical cylinder, one end, away from the second cylinder, of the first cylinder is fixed with the lifting valve cap 5, the upper outer barrel 12 is sleeved with the lifting valve sleeve seat 9, the lifting valve sleeve seat 9 is positioned between the first cylinder and the lifting valve sleeve 8, a first ball valve and a second ball valve for controlling a switch well are arranged in series in a space surrounded by the first conical cylinder, the second cylinder, the lower outer barrel 27 and the lower connector 31, and the first ball valve is arranged close to one side of the fishing connector 1.
Wherein, first ball valve and second ball valve are the normal closed state in the device downhole process.
Further, the clamping structure comprises an annular special-shaped surface clamping ring, wherein two ends of the annular special-shaped surface clamping ring are respectively fixed with the first cylinder and the first conical cylinder, the outer contour line of the annular special-shaped surface clamping ring comprises a first oblique line, a first straight line segment, a second oblique line and a second straight line segment which are sequentially connected, the first oblique line is close to one side of the fishing joint 1, an acute angle is formed between the first oblique line and the second oblique line, and the diameter of an annular ring formed around the first straight line segment is larger than that of an annular ring formed around the second straight line segment.
Further, the latch connection structure specifically includes:
The latch claw lower seat ring 15 sleeved on the annular special-shaped surface clamping ring is sleeved and fixed on the annular surface where the latch claw lower seat ring 15 and the first oblique line section are located, the latch claw ring 16 is sleeved outside the latch claw lower seat ring 15, the latch claw ring 16 is hinged with the latch claw lower seat ring 15, a plurality of latch claws 17 are uniformly distributed on the latch claw ring 16, the plurality of latch claws 17 are fixed with the latch claw ring 16, and the latch claws 17 are clamped in the annular special-shaped surface clamping ring.
Further, the structure of the first ball valve specifically includes:
The first ball seat 181 is sleeved and fixed in the upper outer cylinder 12, the first ball piston 191 is sleeved outside the first ball seat 181, the lower seat ring 25 is sleeved in the first ball piston 191, the lower seat ring 25 is positioned at one end deviating from the first ball seat 181, one end of the lower seat ring 25, which is close to the first ball seat 181, is sleeved and fixed with the first ball support 211, the surfaces of the first ball support 211, which are opposite to the first ball seat 181, are respectively provided with a first cambered surface, the two opposite first cambered surfaces form a first clamping groove structure, and the first ball 20 is clamped in the first clamping groove structure; two first support arms are uniformly distributed on the first sphere support 211, the tail end of each first support arm is a second cambered surface, the second cambered surface is abutted with the rotating shaft of the first sphere 20 to realize the positioning of the circle center of the first sphere 20, the surface, close to the rotating shaft, of the first sphere 20 is provided with a first groove body eccentrically arranged, a first push rod is clamped in the first groove body, and the first push rod is fixed with the first sphere piston 191; a first elastic piece 241 is sleeved between the lower seat ring 25 and the first sphere piston 191, and a plurality of second elastic pieces 221 are uniformly distributed between the lower seat ring 25 and the first sphere support 211.
Wherein the first elastic member 241 is a coil spring.
A first passage, as shown in fig. 1, one end of which communicates with an external pressurizing device and the other end communicates with a first annular pressurizing chamber between the upper outer cylinder 12 and the first ball piston 191 via the latch body 2, the upper outer cylinder 12, for pressurizing the first annular pressurizing chamber, thereby pushing the first ball piston 191 to move and opening the first ball valve; specifically, the first ball valve is opened by pressing from the first passage shown in fig. 1, i.e., pressing from the passage on the lower side in fig. 1, via the external pressing device, driving the first ball piston 191 downward, compressing the first elastic member 241, and rotating the first ball 20 to the open position.
And a second passage, as shown in fig. 2, one end of which communicates with the external pressurizing device and the other end communicates with the second annular pressurizing chamber between the upper outer cylinder 12, the lower race 25 and the first ball piston 191 via the latch body 2 and the upper outer cylinder 12, for pressurizing the second annular pressurizing chamber, thereby pushing the first ball piston 191 to move reversely to close the first ball valve.
Specifically, the pressurization from the second channel shown in fig. 2, that is, the channel pressurization drive on the lower side in fig. 2, via the external pressurization device, the pressurization drives the first ball piston 191 to move upward, releases the first elastic member 241, and rotates the first ball 20 to the closed position.
As shown in fig. 12, the first ball 20 has a bar slot and a central shaft, and one end of the first rotation pin 32 is in the bar slot for turning the first ball 20 to open and close.
Specifically, as shown in fig. 6, a connection sectional view of the first ball 20, the first ball piston 191, the first rotation pin 32, and the first rotation pin locking cap 33 is shown in detail, wherein the lower end surface of the first rotation pin locking cap 33 is limited to the bottom surface of the counterbore of the first ball piston 191. The first rotating pin 32 is connected with the first rotating pin locking cap 33 through threads, the lower end face of the first rotating pin locking cap 33 is limited on the bottom surface of a counter bore of the first ball piston 191, the outer circle of one end of the first rotating pin 32 is located in the first ball piston 191, the other end of the first rotating pin 32 is limited in a strip-shaped groove of the first ball 20, the first ball piston 191 moves up and down, the first rotating pin 32 is synchronously driven to move along with the first ball piston 191, and the first ball 20 is rotated to be opened and closed.
In order to increase the sealing effect, a sealing structure is provided on the first rotation pin 32.
The seal structure includes a support seal 84 and a seal ring 83 coaxially mounted in turn on the first swivel pin 32, the seal ring 83 preferably being an O-ring.
Wherein the first ball seat 181 is screw-coupled to the upper outer cylinder 12.
Wherein the first elastic member 241 is preferably a spring, the first elastic member 241 is fixed between the first ball piston 191 and the lower race 25.
Wherein the first ball piston 191 moves downward limited by the lower race 25 and moves upward limited by the upper outer cylinder 12. The outer circular end surface of the left end step of the lower seat ring 25 is limited on the inner hole end surface of the upper outer cylinder 12, and the right end is limited on the left end surface of the lower outer cylinder 27.
Wherein, be provided with first split ring 26 between lower urceolus 27 and the upper urceolus 12, first split ring 26 overlaps on the excircle of lower urceolus 27, is located the hole groove of upper urceolus 12.
Wherein, as shown in fig. 3, the lower outer cylinder 27 is connected with the upper outer cylinder 12 through screw threads, and a first ball stud 421 is provided, and the first ball stud 421 is used for preventing relative rotation between the lower outer cylinder 27 and the upper outer cylinder 12.
Wherein, the inner hole groove of the lower outer cylinder 27 is sleeved with a second split ring 30, and the second split ring 30 is sleeved on the outer circular surface of the inner boss of the lower joint 31.
Wherein, as shown in fig. 3, the lower outer cylinder 27 is connected with the lower joint 31 by screw threads, and a second ball pin 42 is arranged on the circumference of the lower outer cylinder 27, and the second ball pin 42 abuts against the lower outer cylinder 27 by the lower end surface thereof after passing through the lower joint 31 for preventing relative rotation between the lower outer cylinder 27 and the lower joint 31.
Further, the structure of the second ball valve specifically includes:
The second ball seat 18 is sleeved and fixed in the lower seat ring 25, the second ball piston 19 is sleeved outside the second ball seat 18, the lower spring bracket 29 is sleeved in the second ball piston 19, the lower spring bracket 29 is positioned at one end deviating from the second ball seat 18, one end, close to the second ball seat 18, of the lower spring bracket 29 is sleeved and fixed with the second ball bracket 21, the surfaces, opposite to the second ball seat 18, of the second ball bracket 21 are respectively provided with a third cambered surface, two opposite third cambered surfaces form a second clamping groove structure, and a second ball 28 is clamped in the second clamping groove structure; the second sphere 28 is provided with a cutting edge for cutting off a continuous oil pipe or a cable; two second support arms are uniformly distributed on the second sphere support 21, the tail end of each second support arm is a fourth cambered surface, the fourth cambered surface is abutted with the rotating shaft of the second sphere 28 to realize the circle center positioning of the second sphere 28, the surface, close to the rotating shaft, of the second sphere 28 is provided with a second groove body which is eccentrically arranged, a second push rod is clamped in the second groove body, and the second push rod is fixed with the second sphere piston 19; a third elastic piece 24 is also sleeved between the lower spring bracket 29 and the second sphere piston 19, and a plurality of fourth elastic pieces 22 are uniformly distributed between the lower spring bracket 29 and the second sphere bracket 21.
Wherein the third elastic member 24 is a coil spring.
A third passage, as shown in fig. 1, one end of which communicates with an external pressurizing device, and the other end communicates with a third annular pressurizing chamber between the lower outer cylinder 27 and the second ball piston 19 via the latch body 2, the upper outer cylinder 12, the lower outer cylinder 27, and the third annular pressurizing chamber for pressurizing the third annular pressurizing chamber, thereby pushing the second ball piston 19 to move and opening the second ball valve;
Specifically, the second ball valve is opened by pressing from the third passage shown in fig. 1, that is, pressing from the upper passage in fig. 1 via the external pressing device, driving the second ball piston 19 to move downward, compressing the third elastic member 24, and rotating the second ball 28 to the open position.
And a fourth passage, as shown in fig. 2, one end of which communicates with the external pressurizing device, and the other end communicates with a fourth annular pressurizing chamber between the lower outer cylinder 27, the lower spring bracket 29 and the second ball piston 19 via the latch body 2, the upper outer cylinder 12, the lower outer cylinder 27, for pressurizing the fourth annular pressurizing chamber, thereby pushing the second ball piston 19 to move reversely, and closing the second ball valve.
Specifically, the second ball piston 19 is driven to move upward by the pressurization from the fourth channel shown in fig. 2, that is, the channel pressurization on the upper side in fig. 2 via the external pressurization device, releasing the third elastic member 24, and rotating the second ball 28 to the closed position.
As shown in the schematic structure of the second sphere 28 in fig. 11, the second sphere 28 has a slot, and one end of the second rotation pin is located in the slot for pulling the second sphere 28 to rotate to open or close. The second ball 28 is further provided with a notch structure, the notch structure is used for giving way, and the other side of the second ball 28 is provided with a cutting edge which is used for cutting off a coiled tubing or a cable.
Wherein, second ball seat 18 passes through threaded connection with lower race 25, and the second swivel pin passes through threaded connection with second swivel pin locking cap, and the lower terminal surface of second swivel pin locking cap limits and is located the counter bore bottom surface of second spheroid piston 19. One end excircle of the second rotary pin is positioned in a hole of the second sphere piston 19, the other end is limited in a strip-shaped groove of the second sphere 28, the second sphere piston 19 moves up and down, and the second rotary pin moves along with the second sphere piston, so that the second sphere 28 is rotated to be opened and closed.
Wherein the third elastic member 24 is trapped between the lower spring carrier 29 and the second ball piston 19. The second ball piston 19 is limited in downward movement by the lower spring bracket 29 and in upward movement by the lower race 25. The outer circular end surface of the step at the left end of the lower seat ring 25 is limited on the inner hole end surface of the upper outer cylinder 12, and the right end is limited on the left end surface of the lower outer cylinder 27.
Further, the structure of the control structure specifically includes:
As shown in fig. 4, a fifth passage for opening the latch passage is provided in the latch body 2, one end of the fifth passage communicates with the external pressurizing device, and the other end communicates with a fifth annular pressurizing chamber between the latch piston 7 and the latch piston retainer 13 for pressurizing the fifth annular pressurizing chamber, thereby pushing the latch piston 7 to move, opening the latch connecting structure, and separating the latch portion from the body portion.
The latch assist piston 11 and the latch piston 7 are pushed upward to release the latch claw 17 by the external pressurizing device from the fifth passage pressurizing shown in fig. 4, i.e., the passage pressurizing on the lower side in fig. 4. The latch claw 17 opens to release the upper outer cylinder 12, and at this time, the salvage joint 1, the latch body 2, the latch ring 3, the latch body sleeve 4, the latch outer cylinder 6, the latch piston 7, the lifting valve sleeve 8, the latch torque outer cylinder 10, the latch auxiliary piston 11, the latch piston retainer ring 13, the lifting valve sleeve retainer ring 14, the lower seat ring of the latch claw 15, the latch claw ring 16 and the latch claw 17 can be lifted up to realize the unlatching of the upper latch mechanism and the following mechanism.
As shown in fig. 3, the sixth passage is a lower passage shown in fig. 3, one end of the sixth passage communicates with the external pressurizing device, and the other end communicates with the sixth annular pressurizing chamber between the latch body sleeve 4, the latch piston 7 and the latch auxiliary piston 11 via the latch body 2, for pressurizing the sixth annular pressurizing chamber, thereby pushing the latch piston 7 to move, and connecting the latch portion and the body portion.
In use, the latch assist piston 11 and the latch piston 7 are pushed to move downward to cover the latch claw 17 by pressurization from the sixth passage shown in fig. 3 via the external pressurization device. The latch claw 17 contracts and clasps the upper outer cylinder 12, and the upper latch mechanism is connected with the following mechanism.
Further, the device also comprises a first chemical agent injection part, and the structure of the device specifically comprises:
The seventh channel, as shown in fig. 3, is opened at one side of the latch body 2 near the fishing joint 1, and a check valve assembly 43 is arranged in the seventh channel, and the check valve assembly 43 comprises two check valves which are sequentially connected in series, and the input end of the check valve is connected with the chemical agent output end of the external device and is used for injecting the chemical agent between the latch body 2 and the lifting valve cap 5.
Wherein the seventh passage is an upper passage shown in fig. 3, and the seventh passage is connected to the upper end of the first ball valve, and the chemical agent can be injected into a position above the first ball valve. A check valve assembly 43 of two check valves is provided at the injection port to prevent back flow of chemicals and leakage of oil and gas from the well bore.
Wherein the first chemical injection portion comprises a check valve assembly 43 and a plug 38, the plug 38 being threadably connected to the latch body 2, trapping the check valve assembly 43 in the seventh passage of the latch body.
The check valve assembly 43 includes two identical sets of check valves disposed in series in a seventh passage. The check valve consists of a valve seat 85, a valve core 86, a spring 87, a spacer ring 88 and a retainer ring 89.
Wherein the retainer ring 89 is a 90O-ring.
As shown in fig. 10, the valve core 86 is installed in the inner hole of the valve seat 85, under the action of the elasticity of the spring 87, the conical surface of the left end of the valve core 86 is clung to the conical surface of the inner hole of the valve seat 85, the conical surface of the valve core 86 is provided with a sealing groove in a vehicle, a 90O-shaped ring is installed in the sealing groove of the valve core 86 to realize sealing, the upper end of the spring 87 is positioned in the inner hole of the valve core 86, the lower end of the spring 87 is positioned in the inner hole of the spacing ring 88, the lower end surface of the spacing ring 88 is clung to the retaining ring 89 under the action of the elasticity of the spring 87, and the retaining ring 89 is installed in the annular groove of the inner hole of the valve seat 85.
Further, the device also comprises a second chemical agent injection part, and the structure of the device specifically comprises:
As shown in fig. 4, the eighth channel, i.e., the upper channel in fig. 4, has one end connected to the chemical agent output end of the external device and the other end communicated with the lower joint 31 and the inner cavity of the lower joint 31 via the latch body 2, the upper outer cylinder 12, the lower outer cylinder 27, and thereby the channel injects chemical agent below the second sphere to prevent the formation of hydrate.
As shown in fig. 5, the relative positions of the 8 channels of the device are shown, wherein:
6 represents a first channel, i.e. a first sphere opens the channel, as shown in fig. 1;
1 represents a third channel, i.e. a second sphere opening channel, as shown in fig. 1;
7 represents a second channel, i.e. a first sphere closing channel, as shown in fig. 2;
2 represents a fourth channel, i.e. a second sphere closing channel, as shown in fig. 2;
8 represents a seventh channel, i.e., an upper chemical injection channel, as shown in fig. 3;
4 represents a sixth channel, namely a latch connection channel, as shown in fig. 3;
5 represents a fifth channel, namely a break latch channel, as shown in fig. 4;
3 represents an eighth channel, a downhole chemical injection channel, as shown in fig. 4.
In normal non-use conditions, the inlets of each channel may be plugged with plugs 34 to provide protection to the channel.
Wherein, be provided with holding screw 35 in the threaded connection department of fishing joint 1 and latch ring 3, the reason that sets up holding screw 35 is:
during mechanical unlatching, the latch body 2 is required to be screwed right, so that the tripping of the left-handed threads between the latch outer cylinder 6 and the latch torque outer cylinder 10 is realized, the torque is transmitted through the right-handed latch body 2, and the release cannot be realized here, so that a set screw 35 is arranged at a threaded connection part for preventing the right-handed threads on the latch body 2 from tripping from the position during unlatching.
The set screw 35 is preferably a headless screw, and a flat slot is formed on the end surface of the headless screw, so that the operation is convenient.
Wherein the latch ring 3 and the latch outer cylinder 6, the latch body sleeve 4 and the latch body 2 are all connected by screw threads.
As shown in fig. 7, fig. 7 is a cross-sectional view showing the connection between the latch ring 3, the latch body cover 4, the latch outer tube 6, and the latch body 2, and the connection between the latch torque outer tube 10 and the latch outer tube 6. A torque transmission pin 36 is arranged among the latch ring 3, the latch body sleeve 4, the latch outer barrel 6 and the latch body 2 in a penetrating way. After the torque transmission pin 36 passes through the step cylindrical hole at the left end of the latch outer cylinder 6 and the mounting hole on the latch body sleeve 4 respectively, the lower end surface of the torque transmission pin contacts with the cylindrical slot surface on the latch body 2 to limit, the latch ring 3, the latch body sleeve 4 and the latch outer cylinder 6 are fixed, and when the right-handed thread on the latch body 2 is tripped to perform the unlatching operation, the latch body sleeve 4 is prevented from rotating, and the left end surface of the latch body sleeve 4 is limited on the latch ring 3.
The latch piston 7 is installed in the inner hole of the latch outer cylinder 6, is limited by the left end face of the latch piston retainer ring 13 downwards, moves upwards to the limit of the left end face of the outer circle of the right end step of the latch body sleeve 4, the latch auxiliary piston 11 is installed in the inner hole of the left end of the latch piston 7, is limited downwards to the right end face of the left end step hole of the latch piston 7, and is limited upwards to the latch body sleeve 4, and the initial installation position of the latch piston 7 is the A-A section view position of fig. 1.
In order to improve the tightness, O-shaped rings are arranged between the lifting valve cap 5 and the latch body 2 and between the latch auxiliary piston 11 and the latch piston 7, and the latch auxiliary piston 11 and the latch body 2, and the upward movement of the latch piston 7 is avoided because the stress of the device in the process of descending the well is balanced and the friction force of the O-shaped rings is overcome.
As shown in fig. 7, the latch torque outer cylinder 10 is connected with the latch outer cylinder 6 through left-handed threads, a latch shear pin 37 is arranged at the joint of the latch torque outer cylinder 10 and the latch outer cylinder 6, a threaded through hole is formed in the latch torque outer cylinder 10, a strip-shaped groove is formed in the latch outer cylinder 6, and the latch shear pin 37 is screwed on the latch torque outer cylinder 10 and penetrates through the threaded hole to enter the strip-shaped groove of the latch outer cylinder 6. The latch shear pin 37 is used to provide protection against accidental release for right-handed column unlatching.
As shown in fig. 8, fig. 8 is a cross-sectional view showing the connection between the latch torque outer cylinder 10 and the latch outer cylinder 6. The joint of the latch torque outer cylinder 10 and the latch outer cylinder 6 is provided with an inner hexagon screw 39 for connection, a threaded hole is formed in the latch torque outer cylinder 10, the inner hexagon screw 39 is connected with the latch torque outer cylinder 10 through threads, the lower end of the inner hexagon screw 39 enters an outer circular groove of the latch outer cylinder 6, the latch outer cylinder 6 is guaranteed to be loosened and moved upwards for a certain distance, the outer circular groove on the inner hexagon screw is limited by the inner hexagon screw 39, the inner hexagon screw cannot be moved upwards continuously and completely separated, and the inner hexagon screw can be lifted out of a well together with the upper part of the outer circular groove after the inner hexagon screw is unlocked.
The latch piston check ring 13 is provided with internal threads, the latch body 2 is provided with external threads, and the latch piston check ring 13 is fixedly connected with the latch body 2 through threads.
Wherein the lift valve sleeve retainer 14 is threadably connected to the latch body 2 and secures the lift valve sleeve 8 in the latch body 2.
As shown in fig. 9, fig. 9 is a schematic view showing the connection of the lower race of the latch claw 15, the latch claw ring 16, the latch claw 17, and the upper outer cylinder 12. The lower end conical surface of the lower seat ring of the latch claw 15 is jointed with the conical surface of the upper outer cylinder 12 to limit, the latch claw ring 16 is of an open structure, penetrates through the circular arc groove of the latch claw ring 16 and fixedly connects the latch claw 17, and the latch claw 17 holds the upper outer cylinder 12 tightly, so that the connection between the latch part and the body part is realized.
The lifting valve cap 5 is connected with the upper outer cylinder 12 through threads, the lifting valve sleeve seat 9 is sleeved on the outer circle of the upper outer cylinder 12 and is fixed by the lifting valve sleeve 8, the upper outer cylinder 12 is connected with the lower outer cylinder 27 through threads, and the lower outer cylinder 27 is connected with the lower joint 31 through threads.
The invention has the ball valve function, is a double fault protection mechanism, and is in a normally closed state in the well descending process of the device, the first ball 20 pushes the first ball piston 191 to move upwards under the action of the elastic force of the first elastic piece 241, and the first rotating pin 32 on the first ball piston 191 moves upwards along with the upward movement to toggle the first ball 20 to be in a closed state, so that the failure protection function is realized; the second ball 28 pushes the second ball piston 19 to move upwards under the action of the elastic force of the third elastic member 24, and the second rotating pin thereon moves upwards along with the upward movement, so that the second ball 28 is shifted to be in a closed state, and thus the fail-safe function is achieved. In addition, the first ball valve and the second ball valve are protection valves which can be respectively and independently closed/opened, and have double controllable protection characteristics.
The invention has the beneficial effects that:
The invention has controllable disconnection and connection functions, adopts a hydraulic control mode to control the latch connection mechanism at the upper end of the underwater test tree to quickly disconnect and connect the test pipe column, and requires that the test pipe column must be disconnected immediately to withdraw the platform from the wellhead position when meeting special sea conditions such as typhoons or tides in the test process. When the latch connection mechanism is disconnected, the fifth channel at the upper end needs to be pressurized, the latch piston is pushed to move upwards, the latch claw is opened, the lifting device is disconnected from the lower part, the fishing joint 1, the latch body 2, the latch ring 3, the latch body sleeve 4, the latch outer cylinder 6, the latch piston 7, the lifting valve sleeve 8, the latch torque outer cylinder 10, the latch auxiliary piston 11, the latch piston check ring 13, the lifting valve sleeve check ring 14, the lower seat ring of the latch claw 15, the latch claw ring 16 and the latch claw 17 are lifted, and the rest of the device is left at the bottom of the well. Pressurizing from the sixth channel at the upper end, pushing the latch piston to move downwards, limiting the opening of the latch claw, and lifting the device to lift the underwater test tree and other devices below the underwater test tree to the ground.
In addition, the second ball valve has a shearing function, and as the second ball 28 is provided with a shearing edge, the action of the second ball valve can be controlled by the platform control system through a hydraulic pipeline in the closing process of the second ball valve, and the coiled tubing can be sheared. The second ball valve is pressurized from the fourth passage and the coiled tubing is sheared off.
In addition, the invention has the function of injecting chemical agents, and the upper end of the underwater test tree is provided with a seventh channel and an eighth channel with two chemical agent injection ports. The seventh channel is connected to the upper end of the first ball valve, so that chemical agents can be injected to the position above the first ball valve, and two one-way valve assemblies are designed at the injection port of the underwater test tree shell to prevent the backflow of the chemical agents and the leakage of oil gas in a shaft from the injection port; an eighth passage injects chemical under the second ball to prevent hydrate formation, and the eighth passage is connected under the second ball valve and can be injected under the test string. Since the temperature of deep water is low in an underwater gas well, hydrate is easily formed, and it is generally necessary to inject a chemical agent such as methanol in order to prevent the formation of hydrate.
In addition, the invention has the mechanical unlatching function, and the underwater test tree can be directly controlled to break and block oil gas through a hydraulic pipeline in the operation control process. When the hydraulic pipeline fails, the method of shearing the latch shear pin 37 by rotating the pipe column rightward can be used for unlocking and breaking, and the underwater test tree is driven by the annular high pressure to forcibly plug the high-pressure oil gas in the pipe column.
The invention has the pumping function, and when the underwater test tree is in a closed state and fails to be opened due to the loss of hydraulic drive or objective factors, the pumping can be realized under the action of a certain positive pressure, and the positive pressure value is adjustable.
The appearance contours and the installation positions of the underwater test tree, the flow bearing valve and the like are effectively matched with the annular and semi-seal ram blowout preventers in the underwater blowout preventer stack, so that the damage of test equipment in the closing process of the blowout preventers can be prevented, and the tight blocking of high-pressure oil gas in an annulus can be realized.
The above disclosure is only a preferred embodiment of the present invention, but the embodiment of the present invention is not limited thereto, and any changes that can be thought by those skilled in the art should fall within the protection scope of the present invention.
Claims (3)
1. An underwater test tree, comprising:
a latch portion;
one end of the body part is sleeved in the latch part;
The latch connecting structure is sleeved between the latch part and the body part, one end of the latch connecting structure is connected with the latch part, and the other end of the latch connecting structure is clamped with the body part;
The control structure is arranged on the latch part and the body part and is used for controlling the latch connecting structure to act so as to realize the connection or separation of the latch part and the body part;
The latch part comprises a fishing joint (1), a latch ring (3), a latch outer cylinder (6) and a latch torque outer cylinder (10) which are coaxially sleeved in sequence; the latch outer cylinder (6) is sleeved with a latch body sleeve (4), the latch body sleeve (4) is clamped with one side of the latch ring (3) which is away from the fishing joint (1), a latch piston (7) is sleeved between the latch body sleeve (4) and the latch outer cylinder (6), a latch auxiliary piston (11) is sleeved in the latch piston (7), the latch auxiliary piston (11) is positioned on one side close to the latch body sleeve (4), a latch body (2) is fixedly sleeved in the latch body sleeve (4), a latch piston check ring (13) is sleeved between the latch body (2) and the latch piston (7), the latch piston check ring (13) is fixed with the latch body (2), a lifting valve sleeve (8) and a lifting check ring (14) are coaxially sleeved in the latch body (2), the lifting valve sleeve (8) and the lifting check ring (14) are positioned on one side of the latch body (2) which is away from the fishing joint (1), the lifting valve sleeve (14) and the latch body (2) are clamped with the latch body (14) which is fixed;
The body part comprises a lifting valve cap (5), an upper outer barrel (12), a lower outer barrel (27) and a lower joint (31) which are coaxially sleeved in sequence, wherein the upper outer barrel (12) comprises a first cylinder, a first conical cylinder and a second cylinder which are coaxially sleeved in sequence and fixed, the diameter of the second cylinder is larger than that of the first cylinder, a clamping structure matched with a latch connection structure is arranged between the first cylinder and the first conical cylinder, one end of the first cylinder, far away from the second cylinder, is fixed with the lifting valve cap (5), a lifting valve sleeve seat (9) is sleeved on the upper outer barrel (12), the lifting valve sleeve seat (9) is positioned between the first cylinder and the lifting valve sleeve (8), and a first ball valve and a second ball valve for controlling a switch well are arranged in series in a space surrounded by the first conical cylinder, the second cylinder, the lower outer barrel (27) and the lower joint (31), and one side of the first ball valve, close to the fishing joint (1), is provided;
The clamping structure comprises an annular special-shaped surface clamping ring, two ends of the annular special-shaped surface clamping ring are respectively fixed with the first cylinder and the first conical cylinder, the outer contour line of the annular special-shaped surface clamping ring comprises a first oblique line, a first straight line segment, a second oblique line and a second straight line segment which are sequentially connected, the first oblique line is close to one side of the fishing joint (1), an acute angle is formed between the first oblique line and the second oblique line, and the diameter of an annular ring formed around the first straight line segment is larger than that of an annular ring formed around the second straight line segment; the latch connection structure includes:
The lower seat ring (15) of the latch claw is sleeved on the annular special-shaped surface clamping ring and is fixedly sleeved with the annular surface where the first oblique line section is positioned;
The latch claw ring (16) is sleeved outside the latch claw lower seat ring (15) and hinged with the latch claw lower seat ring (15);
The plurality of latch claws (17) are uniformly distributed on the latch claw ring (16) and fixed with the latch claw ring (16), and the latch claws (17) are clamped in the annular special-shaped surface clamping ring; the first ball valve includes:
The first ball seat (181) is sleeved and fixed in the upper outer cylinder (12);
The first ball piston (191) is sleeved outside the first ball seat (181);
the lower seat ring (25) is sleeved in the first ball piston (191) and is positioned at one end deviating from the first ball seat (181), one end, close to the first ball seat (181), of the lower seat ring (25) is sleeved and fixed with the first ball support (211), first cambered surfaces are respectively formed on the surfaces, opposite to the first ball seat (181), of the first ball support (211), two opposite first cambered surfaces form a first clamping groove structure, and a first ball (20) is clamped in the first clamping groove structure; two first support arms are uniformly distributed on the first sphere support (211), the tail end of each first support arm is a second cambered surface, the second cambered surface is abutted with the rotating shaft of the first sphere (20) to realize the positioning of the circle center of the first sphere (20), a first groove body which is eccentrically arranged is formed in the surface, close to the rotating shaft, of the first sphere (20), a first push rod is clamped in the first groove body, and the first push rod is fixed with the first sphere piston (191); a first elastic piece (241) is sleeved between the lower seat ring (25) and the first sphere piston (191), and a plurality of second elastic pieces (221) are uniformly distributed between the lower seat ring (25) and the first sphere bracket (211);
A first passage, one end of which is communicated with an external pressurizing device, and the other end of which is communicated with a first annular pressurizing cavity between the upper outer cylinder (12) and the first ball piston (191) through the latch body (2) and the upper outer cylinder (12), and is used for pressurizing the first annular pressurizing cavity so as to push the first ball piston (191) to move and open a first ball valve;
a second channel, one end of which is communicated with the external pressurizing equipment, and the other end of which is communicated with a second annular pressurizing cavity among the upper outer cylinder (12), the lower seat ring (25) and the first ball piston (191) through the latch body (2) and the upper outer cylinder (12) and is used for pressurizing the second annular pressurizing cavity so as to push the first ball piston (191) to reversely move and close the first ball valve; the second ball valve includes:
the second ball seat (18) is sleeved and fixed in the lower seat ring (25);
The second ball piston (19) is sleeved outside the second ball seat (18);
The lower spring bracket (29) is sleeved in the second ball piston (19) and is positioned at one end deviating from the second ball seat (18), one end, close to the second ball seat (18), of the lower spring bracket (29) is sleeved and fixed with the second ball bracket (21), third cambered surfaces are respectively formed on the surfaces, opposite to the second ball seat (18), of the second ball bracket (21), two opposite third cambered surfaces form a second clamping groove structure, and a second ball (28) is clamped in the second clamping groove structure; the second sphere (28) is provided with a cutting edge for cutting off a continuous oil pipe or a cable; two second support arms are uniformly distributed on the second sphere support (21), the tail end of each second support arm is a fourth cambered surface, the fourth cambered surface is abutted with a rotating shaft of the second sphere (28) to realize the positioning of the center of the circle of the second sphere (28), a second groove body which is eccentrically arranged is formed in the surface, close to the rotating shaft, of the second sphere (28), a second push rod is clamped in the second groove body, and the second push rod is fixed with the second sphere piston (19); a third elastic piece (24) is sleeved between the lower spring bracket (29) and the second sphere piston (19), and a plurality of fourth elastic pieces (22) are uniformly distributed between the lower spring bracket (29) and the second sphere bracket (21);
A third channel, one end of which is communicated with the external pressurizing equipment, and the other end of which is communicated with a third annular pressurizing cavity between the lower outer cylinder (27) and the second ball piston (19) through the latch body (2), the upper outer cylinder (12) and the lower outer cylinder (27), and is used for pressurizing the third annular pressurizing cavity so as to push the second ball piston (19) to move and open a second ball valve;
A fourth channel, one end of which is communicated with the external pressurizing equipment, and the other end of which is communicated with a fourth annular pressurizing cavity among the lower outer cylinder (27), the lower spring bracket (29) and the second ball piston (19) through the latch body (2), the upper outer cylinder (12) and the lower outer cylinder (27), and is used for pressurizing the fourth annular pressurizing cavity so as to push the second ball piston (19) to move reversely and close the second ball valve;
The control structure includes:
a fifth channel, which is arranged on the latch body (2), one end of which is communicated with an external pressurizing device, and the other end of which is communicated with a fifth annular pressurizing cavity between the latch piston (7) and the latch piston retainer ring (13) and is used for pressurizing the fifth annular pressurizing cavity so as to push the latch piston (7) to move, and open a latch connecting structure to separate the latch part from the body part;
and one end of the sixth channel is communicated with external pressurizing equipment, the other end of the sixth channel is communicated with a sixth annular pressurizing cavity among the latch body sleeve (4), the latch piston (7) and the latch auxiliary piston (11) through the latch body (2) and is used for pressurizing the sixth annular pressurizing cavity, so that the latch piston (7) is pushed to move, and the latch part and the body part are connected.
2. The subsea test tree of claim 1, further comprising a first chemical injection section comprising:
the seventh channel is a mounting hole formed in one side of the latch body (2) close to the fishing joint (1);
The check valve assembly (43) is arranged in the seventh channel and comprises two check valves which are sequentially connected in series, and the input end of each check valve is connected with the chemical agent output end of the outside and is used for injecting chemical agent between the latch body (2) and the lifting valve cap (5).
3. The subsea test tree of claim 1, further comprising a second chemical injection section comprising:
And one end of the eighth channel is connected with the chemical agent output end of the external device, and the other end of the eighth channel is communicated with the inner cavity of the lower connector (31) through the latch body (2), the upper outer cylinder (12), the lower outer cylinder (27) and the lower connector (31).
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| CN202110944300.5A CN113638734B (en) | 2021-08-17 | 2021-08-17 | Underwater test tree |
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| CN202110944300.5A CN113638734B (en) | 2021-08-17 | 2021-08-17 | Underwater test tree |
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| CN114320178B (en) * | 2021-12-30 | 2023-07-25 | 西南石油大学 | Electro-hydraulic seat pipe column safety control device for deepwater well completion test |
| CN116735809B (en) * | 2023-08-15 | 2023-10-20 | 北京特新达机房设备有限公司 | Humidification dehumidifier humidity detection equipment for computer lab |
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| CN216429589U (en) * | 2021-08-17 | 2022-05-03 | 宝鸡畅油石油设备有限公司 | Underwater test tree |
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| US8794331B2 (en) * | 2010-10-18 | 2014-08-05 | Ncs Oilfield Services Canada, Inc. | Tools and methods for use in completion of a wellbore |
| CN205936526U (en) * | 2016-08-03 | 2017-02-08 | 宝鸡市元亨石油设备有限责任公司 | Downhole testing valve |
| CN109138877A (en) * | 2018-08-15 | 2019-01-04 | 博德世达（天津）能源科技有限公司 | Fixed ball seat circulating valve, using its drilling equipment and drilling well, blocking method |
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| CN216429589U (en) * | 2021-08-17 | 2022-05-03 | 宝鸡畅油石油设备有限公司 | Underwater test tree |
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