CN110107246B - Oil gas well head and casing head integrated device - Google Patents
Oil gas well head and casing head integrated device Download PDFInfo
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- CN110107246B CN110107246B CN201910292228.5A CN201910292228A CN110107246B CN 110107246 B CN110107246 B CN 110107246B CN 201910292228 A CN201910292228 A CN 201910292228A CN 110107246 B CN110107246 B CN 110107246B
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/04—Casing heads; Suspending casings or tubings in well heads
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/04—Casing heads; Suspending casings or tubings in well heads
- E21B33/0422—Casing heads; Suspending casings or tubings in well heads a suspended tubing or casing being gripped by a slip or an internally serrated member
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/02—Valve arrangements for boreholes or wells in well heads
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
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- Life Sciences & Earth Sciences (AREA)
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- 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)
- Pressure Vessels And Lids Thereof (AREA)
Abstract
The invention discloses a casing head and oil gas wellhead integrated device, which comprises a base, a casing head body arranged on the base, slips, a technical casing hanger and an oil pipe hanger, wherein the slips, the technical casing hanger and the oil pipe hanger are arranged on the casing head body; the balance mechanism comprises a balance pipeline, a flange head, a pressure insurance observer, a pressure protection valve, a pressure gauge, a filling valve and a filling pressure gauge, wherein the flange head, the pressure insurance observer, the pressure protection valve, the pressure gauge, the filling valve and the filling pressure gauge are arranged on the balance pipeline, and a lateral pressure relief mechanism is arranged between the filling valve and the pressure protection valve. The invention has novel design and simple and reasonable structure, can effectively protect the pressure gauge on the balance pipeline, can perform pressure relief when the pressure of the annular space is higher and perform pressure compensation when the pressure of the annular space is too low, and is beneficial to the construction operations of slurry compensation, slurry monitoring, balance liquid filling and the like.
Description
Technical Field
The invention relates to the field of oil and gas casing heads, in particular to an integrated device of a casing head and an oil and gas wellhead.
Background
The casing head is used for fixing a well mouth of a drilling well, connecting a well mouth casing string, supporting the gravity of a technical casing and an oil layer casing, sealing an annular space between layers of pipes, providing transitional connection for installing a blowout preventer and a tubing head and a Christmas tree, and performing construction operations such as mud compensation, mud extrusion, monitoring, balance liquid filling and the like through two side ports on the casing head body. The casing head is typically made of 35 or 42 chromium molybdenum high quality alloy structural steel. And a casing hanger is also arranged in the casing head and used for hanging a casing string with a corresponding specification and sealing the annular space. On which the bop stack is mounted. After the completion of the oil well, a Christmas tree is installed on the casing head.
The utility model discloses a utility model patent that prior art application number is CN201820597197.5 discloses a ready-package casing head for oil recovery well head, including casing head body, hanger, a set of jackscrew, flange balance gate valve, manometer, stop valve, a set of grease injection mouth and a set of mouth of releasing, the hanger sets up on the inner wall of casing head body, the jackscrew is along radially setting up on the casing head body to the jackscrew can pass the inner wall of casing head body and the laminating of hanger, the balanced gate valve of flange sets up the outside at the casing head body, the manometer sets up the end of keeping away from the casing head body at the balanced gate valve of flange to be equipped with the stop valve on the manometer, grease injection mouth and release mouth are along the lower tip of radially setting at the casing head body, the up end of casing head body is equipped with a set of sealed annular of filling up. The utility model discloses a through set up a set of sealed annular of packing at the up end of casing head body, can improve the casing head and connect the sealing performance between the face when installing, this casing head stable performance, the installation effectiveness is high.
The utility model with the prior application number of CN201520837895.4 discloses an oil and gas well casing head, which comprises a casing head body and a hanger, the hanger is arranged in the casing head body, the casing head body comprises an upper casing head component and a lower casing head component, the hanger is of an integral structure, a sealing component is arranged between the hanger casing head bodies, by arranging the hanger with an integral structure, the operation is more convenient in the process of installing the hanger, the positions needing to be sealed are reduced, because the sealing position is reduced, the sealing assembly is arranged for sealing, the sealing effect of the annular space between the upper casing head component and the lower casing head component is better, the technical problems that the sealing effect of the annular space between the upper casing head component and the lower casing head component of the existing oil-gas well casing head is poor and the installation of the hanger is more troublesome are solved, and the oil-gas well casing head with the good sealing is convenient to install and has the advantages of being convenient to install.
The utility model patent of prior art application number CN200920013831.7 discloses a multi-functional wellhead assembly and production tree, by big or small casing head, gate valve, oil pipe head reducing joint, preventer, cross, polished rod sealer, ball valve, check valve, hammering union, tee bend are constituteed: the large casing head and the small casing head, the small casing head and the oil pipe head are both in casing threaded connection, the gate valve and the oil pipe head, and the oil pipe head reducing joint are both in bolted connection, and the oil pipe head reducing joint and a blowout preventer, the blowout preventer and a cross joint, the cross joint and a polish rod sealer, the cross joint and a ball valve, the ball valve and a check valve, the check valve and a hammering union, and the hammering union and the cross joint are all in threaded connection; the lower end of the wellhead device is provided with a double casing head and a double-seal combined structure; a double-ram blowout preventer is arranged on the Christmas tree part. The utility model discloses a well head function singleness that exists among the prior art has been solved, can not realize hanging from top to bottom and prevent the problem of spouting. The utility model discloses a can extensively be used for oil field steam flooding steam oil recovery operation of taking in and send out.
The utility model patent of prior art application number CN200920013830.2 discloses a novel well head device and production tree, comprises casing head casing, slips hanger, tubing head cross, gate valve, tubing hanger, well steel ring, reducing flange, preventer, sealer, stop valve: the slip hanger seat is fixed on the casing head shell, the oil pipe hanger seat is fixed on the oil pipe head cross joint by jackscrews, the oil pipe hanger is sealed and connected with the reducing flange by a middle steel ring through bolts, and the casing head shell is connected with the oil pipe head cross joint, the oil pipe head cross joint is connected with the gate valve, the reducing flange is connected with the blowout preventer, the blowout preventer is connected with the sealer, and the blowout preventer is connected with the stop valve through bolts; the casing head shell and the slip hanger form a slip type high-temperature casing head structure; a sealing structure of a middle steel ring and a metal backing ring is arranged between the oil pipe head and the reducing flange; and a long plunger blowout preventer is arranged on the Christmas tree part. The utility model discloses a conventional thermal production well completion that exists has been solved among the prior art is simple, does not have the problem of preventing spouting the function. It can be widely used in the steam huff and puff operation of thick oil recovery.
The utility model discloses a prior art application number is CN 201220038325.5's utility model patent, discloses the integrative oil casing head of well drilling and completion, is applied to the oil well head. The central hole wall of the cylindrical wellhead device body is provided with two stages of conical steps, and an oil pipe hanger with a conical outer wall is sealed on the larger conical step at the upper part; a technical casing hanger with a conical outer wall is sealed on the lower small conical step; the lower end of the wellhead device body is fixed with an annular inverted slip through a screw, and the diameter of a central hole of the inverted slip is larger than the outer diameter of the technical casing; a Christmas tree cover plate flange is fixed at the top of the wellhead device body through bolts; four transverse holes are symmetrically formed in the wall of the wellhead device body; and a flange joint is fixed on the outer wall of the wellhead body and opposite to the four transverse holes respectively. The effect is as follows: after one-time installation, special operations of oil testing and well completion such as well drilling, well cementation, underground pressure measurement, well washing, fracturing and acidizing can be completed without replacing a wellhead device and changing ground facilities.
The utility model patent with the prior art application number of CN201220015997.4 discloses a metal-sealed thermal recovery casing head, which is suitable for the exploitation of a thermal recovery well of thick oil in an oil field. The utility model consists of a hanger (6) and a casing head shell (7), wherein the upper part of the casing head shell (7) is additionally provided with an upper flange (2), the upper flange (2) is provided with an upper joint (1), the upper joint (1) is connected with a bottom flange of a thermal production wellhead device, the lower part of the upper flange (2) is of a cylindrical structure and is inserted into the upper part of the casing head shell (7), the outer diameter of the upper end of the hanger (6) is provided with a plurality of sealing rings (5), the sealing rings (5) are matched with an inner hole (3) of the upper flange (2) to form metal sealing, when the steam casing (8) is injected into the well and the stress caused by expansion and contraction is expanded and contracted, the lower part of the hanger (6) moves up and down in the casing head shell (7) along with the expansion and contraction, therefore, the thermal recovery wellhead device arranged on the upper part of the upper flange (2) cannot move up and down due to the lifting of the casing (8), and the stability of the wellhead is ensured.
The utility model patent with the application number of prior art being CN201220045867.5 discloses a single section of thick bamboo twin-well offshore thermal recovery well head device, and it is applicable to the viscous crude thermal recovery technology of offshore platform single section of thick bamboo twin-well. The device consists of a large ring plate (2), a small ring plate (3), a positioning pin (1), an inverted slip (4), a casing head (5), a tubing head (7), a tubing hanger (9), a reducing flange (10), a gate valve (8) and a Christmas tree (11), wherein the casing head (5), the tubing head (7) and the Christmas tree (11) are of split structures, a lower connecting flange (16) and an upper connecting flange (17) of the casing head (5) are of fan-shaped structures, and an upper flange (18) of the tubing head (7) is of a fan-shaped structure, two well head devices of the utility model are mutually independent, can simultaneously carry out various operation modes such as steam injection or electric pump oil production, or one well head injects steam, and the other oil production mode, and the like, because each well head is provided with a steam injection tubing hanger (23), an oil production electric pump tubing hanger (19), a steam injection reducing flange (24) and an electric pump oil production steam injection flange (20), each well head device is simpler when the operation mode is changed, greatly facilitating the field operation.
In view of the above, the existing casing head is relatively incomplete in terms of sealing, pressure relief and fluid injection, and therefore, there is a need to develop a casing head that is more complete.
Disclosure of Invention
The invention aims to overcome the problems in the prior art and provides a casing head and oil gas wellhead integrated device which is novel in design, simple and reasonable in structure, capable of effectively protecting a pressure gauge on a balance pipeline, capable of relieving pressure when the pressure of an annular space is high and supplementing pressure when the pressure of the annular space is too low, and beneficial to construction operations of supplementing and extruding mud, monitoring and filling balance liquid and the like.
In order to achieve the technical purpose and achieve the technical effect, the invention is realized by the following technical scheme:
a casing head and oil gas well mouth integrated device comprises a base, a casing head body arranged on the base, slips, a technical casing hanger and an oil pipe hanger, wherein the slips, the technical casing hanger and the oil pipe hanger are arranged on the casing head body; the balance mechanism comprises a balance pipeline and a flange head, a pressure insurance observer, a pressure protection valve, a pressure gauge, a filling valve and a filling pressure gauge which are arranged on the balance pipeline, wherein a lateral pressure relief mechanism is arranged between the filling valve and the pressure protection valve, and the flange head is arranged at the two ends of the balance pipeline and is used for being connected with the casing head body and/or the flange joint on the filling pipeline. By adopting the technical scheme, the base is used for being installed on an oil gas well mouth or connected with a well seat on the oil gas well mouth; the slips are used for connecting the surface casing; the pressure insurance observer is used for preliminarily displaying the pressure in the annular space between each layer of pipes; the pressure protection valve can be used for protecting the pressure gauge, and can also be used for pressure relief and/or slurry supplement and extrusion, balancing liquid filling and other construction operations; the pressure gauge is used for accurately displaying the pressure value between each layer of pipe; the filling valve can be used for construction operations such as mud compensation and squeezing, balancing liquid filling and the like; the pouring pressure gauge can be used for monitoring the pouring pressure so as to ensure that the construction operations such as slurry supplement and extrusion, balancing liquid filling and the like can be smoothly carried out; the lateral pressure relief mechanism is used for relieving high pressure in the annular space between the pipes of each layer so as to protect pressure balance in the annular space.
Preferably, the balance pipeline is provided with a flange head, a pressure safety observer, a pressure protection valve, a pressure gauge, a lateral pressure relief mechanism, a filling valve, a filling pressure gauge and a flange head in sequence. By adopting the technical scheme, the balance pipeline is connected to the casing head body through the flange head; the pressure safety observer is used to preliminarily observe the pressure in the annular space between the story pipes when the pressure protection valve is closed, wherein the pressure is identified as low pressure, medium pressure and high pressure.
Preferably, the pressure insurance observer drives the slide block to move by using a sensitive element in the observer so as to judge the pressure in the pipeline according to the moving distance of the slide block and the pressure mark on the slide block; wherein, the pressure mark can indicate the pressure by the color depth on the sliding block.
Preferably, the lateral pressure relief mechanism comprises a pressure relief pipe, a pressure relief valve and a flange head, the pressure relief valve and the flange head are arranged on the pressure relief pipe, the flange head is arranged at two ends of the pressure relief pipe, one end of the flange head is connected with a flange joint arranged on the balance pipeline, and the other end of the flange head is used for being connected with a flange joint arranged on the pressure relief pipeline. By adopting the technical scheme, the arranged pressure relief valve is used for discharging the pressure in the annular space; the pressure relief pipe that sets up is connected with the pressure release pipeline and is helped excreting poisonous gas etc. to the underground.
Preferably, the pressure protection valve, the filling valve and the pressure relief valve comprise manual valves or electric valves; the electric valve is connected with the central controller through the driving controller. By adopting the technical scheme, the central controller sends a signal to the driving controller, and the driving controller controls the opening or closing of the electric valve according to the received signal; the electrically operated valve generally comprises an electric actuating mechanism and a valve, and the electrically operated valve uses electric energy as power to drive the valve through the electric actuating mechanism, so that the opening and closing actions of the valve are realized, and the aim of opening and closing the pipeline medium is fulfilled; in addition, the electric actuator comprises a partial-rotation electric actuator and a multi-rotation electric actuator, and the electric-driven multi-rotation actuator is one of the most common and reliable actuator types; the single-phase or three-phase motor is used for driving a gear or a worm gear and finally driving a valve rod nut, and the valve rod nut enables a valve rod to move to open or close the valve. The multi-rotation type electric actuating mechanism can quickly drive a large-size valve; in order to protect the valve from being damaged, a limit switch arranged at the end point of the valve stroke can cut off the power supply of the motor, meanwhile, when the safety torque is exceeded, the torque sensing device can also cut off the power supply of the motor, a position switch is used for indicating the switching state of the valve, and a hand wheel mechanism provided with a clutch device can manually operate the valve when the power supply fails. The main advantage of this type of actuator is that all the components are mounted in one housing, integrating all the basic and advanced functions in a waterproof, dustproof, explosion-proof housing. The main disadvantage is that the valve can only remain in place when the power fails and only with the backup power system can the valve achieve a fail safe position (fail-on or fail-off). In addition, this actuator is similar to an electric multi-turn actuator, with the primary difference being that the final output of the actuator is a 90 degree motion of 1/4 turns. The new generation of electric single-turn actuators combines the complex functions of most multi-turn actuators, such as: and a non-entry user-friendly operation interface is used for realizing the parameter setting and diagnosis functions. The single rotary actuator is compact and can be mounted on small size valves, typically with an output torque of up to 800 kg m, and in addition requires a small power supply, and they can be equipped with batteries for fail-safe operation.
Preferably, the pressure gauge and the filling pressure gauge comprise a mechanical pressure gauge or a digital pressure gauge; and the digital pressure gauge is connected with the central controller. By adopting the technical scheme, the digital pressure gauge is used for sending a measured pressure signal to the central controller; the pressure gauge adopts an elastic element as a sensitive element, measures and indicates a gauge with pressure higher than ambient pressure, is very commonly applied, and almost extends to all fields of industrial processes and scientific researches. The method is widely available in the fields of heat pipe networks, oil and gas transmission, water and gas supply systems, vehicle maintenance plants and shops and the like; especially in the industrial process control and technical measurement process, the mechanical pressure gauge is more and more widely applied due to the characteristics of high mechanical strength, convenient production and the like of the elastic sensitive element of the mechanical pressure gauge. The digital pressure gauge combines the world leading microprocessing technology and the advanced analog-to-digital conversion algorithm to meet the requirements of high precision and low power consumption. The large screen liquid crystal display technology and the unique background light technology make the data clear and readable at night. And an import chip is adopted, the highest value is kept for instrument data acquisition, memory and measurement, and the zero is manually returned. The shell is fully sealed by stainless steel, is corrosion-resistant and vibration-resistant, and can be applied to various complex environments. The pressure of the medium to be measured is transmitted to the pressure sensing film of the sensor through the pressure interface, and the sensor amplifies the sensed electric signal, converts the signal into V/A signal, and sends the signal to the CPU for processing, setting display digit, controlling the output of switching value, and providing the output of analog quantity or digital quantity to realize the process of pressure display, control and transmission.
Preferably, the central controller comprises a main control circuit board connected with the digital pressure gauge and the electric valve and a processor arranged on the main control circuit board; the processor automatically controls the pressure protection valve, the filling valve and/or the pressure relief valve to be opened or closed through the received pressure signal of the digital pressure gauge and an internally set control program. By adopting the technical scheme, the central controller automatically controls the opening or closing of the valve and the opening and closing of the filling machine connected with the filling pipeline according to the received pressure signal and the set control program.
Preferably, an alarm is further arranged on one side of the balance pipeline and connected with the controller and/or the pressure gauge. By adopting the technical scheme, the alarm is helpful for reminding workers, wherein the alarm adopts an acousto-optic alarm.
The invention has the beneficial effects that:
1. the invention has novel design and simple and reasonable structure, not only can effectively protect the pressure gauge on the balance pipeline, but also can carry out pressure relief when the pressure of the annular space is higher and carry out pressure compensation when the pressure of the annular space is too low, and is beneficial to the construction operations of slurry compensation and extrusion, monitoring, balance liquid filling and the like;
2. the pressure protection valve, the filling valve and the pressure relief valve can effectively seal the pressure in the annular space, and the opening or closing of the valves can be automatically controlled through the arranged central controller, so that the digital management is promoted, and the workload of workers is reduced;
3. the pressure in the annular space can be observed under the condition that the valve is not opened through the arranged pressure safety observer, and the pressure protection valve can be opened slowly when the pressure is too high, so that the pressure gauge is protected from being damaged due to too fast pressure rise, and the pressure in the annular space can be accurately displayed;
4. the pressure relief valve can discharge high-pressure gas or liquid in the annular space after the pressure protection valve is opened so as to protect the pressure in the annular space;
5. the perfusion valve and the perfusion pressure gauge are used for supplementing pressure when the pressure in the annular space is lower than the pre-pressing real-time pressure, so that the pressure in the annular space is increased; wherein, the pressure of filling valve on filling the manometer is greater than when filling in order to carry out the pressure compensation.
The foregoing is a summary of the present invention, and in order to provide a clear understanding of the technical means of the present invention and to be implemented in accordance with the present specification, the following is a detailed description of the preferred embodiments of the present invention with reference to the accompanying drawings. The detailed description of the present invention is given in detail by the following examples and the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
FIG. 1 is a schematic view of a structure according to the present invention;
fig. 2 is a partial schematic view of the present invention.
The reference numbers in the figures illustrate: the pressure relief device comprises a base 1, a casing head body 2, a slip 3, a technical casing hanger 4, an oil pipe hanger 5, a balance mechanism 6, a balance pipeline 7, a flange head 8, a pressure safety observer 9, a pressure protection valve 10, a pressure gauge 11, a filling valve 12, a filling pressure gauge 13, a lateral pressure relief mechanism 14, a filling pipeline 15, a flange joint 16, a pressure relief pipe 17, a pressure relief valve 18, a pressure relief pipeline 19, a well seat 101, a surface casing 102, a technical casing 103 and an oil pipe 104.
Detailed Description
The invention is further described with reference to the accompanying drawings in which:
referring to fig. 1 to 2, the casing head and oil gas wellhead integrated device comprises a base 1, a casing head body 2 arranged on the base 1, slips 3, a technical casing hanger 4 and an oil pipe hanger 5 which are arranged on the casing head body 2, wherein balancing mechanisms 6 are symmetrically arranged on two sides of the casing head body 2, and the balancing mechanisms 6 are positioned between the slips 3 and the technical casing hanger 4 and between the technical casing hanger 4 and the oil pipe hanger 5; balance mechanism 6 includes balanced pipeline 7 and sets up flange head 8, pressure insurance viewer 9 on balanced pipeline 7, protects and presses valve 10, manometer 11, filling valve 12 and perfusion pressure table 13, be provided with side direction pressure relief mechanism 14 between filling valve 12 and the pressure protection valve 10, flange head 8 sets up and is used for being connected with flange joint 16 on casing head body 2 and/or the filling pipeline 15 in the both ends of balanced pipeline 7. By adopting the technical scheme, the base 1 is used for being installed on an oil gas well head or connected with a well seat 101 on the oil gas well head; slips 3 are used to connect the surface casing 102; the pressure fuse viewer 13 is used to preliminarily display the pressure in the annular space between the layers of pipes; the pressure protection valve 10 can be used for protecting the pressure gauge 11, and can also be used for pressure relief and/or construction operations such as slurry supplement and extrusion, balance liquid filling and the like; the pressure gauge 11 is used for accurately displaying the pressure value between each layer of pipes; the filling valve 12 can be used for construction operations such as mud filling and squeezing, balancing liquid filling and the like; the pouring pressure gauge 13 can be used for monitoring pouring pressure so as to ensure that construction operations such as slurry supplement and extrusion, balancing liquid filling and the like can be smoothly carried out; the lateral pressure relief mechanism 14 is used for relieving high pressure in the annular space between the layers of pipes so as to protect the pressure balance in the annular space.
Preferably, the balance pipeline 7 is sequentially provided with a flange head 8, a pressure insurance observer 9, a pressure protection valve 10, a pressure gauge 11, a lateral pressure relief mechanism 14, a filling valve 12, a filling pressure gauge 13 and the flange head 8. By adopting the technical scheme, the balance pipeline 7 is connected to the casing head body 2 through the flange head 8; the pressure fuse viewer 9 is used to initially view the pressure in the annular space between the layer pipes when the pressure protection valve 10 is closed, wherein the pressure is identified as low pressure, medium pressure and high pressure.
Preferably, the pressure safety observer 9 uses a sensitive element in the observer to drive the movement of the slide block so as to judge the pressure in the pipeline according to the movement distance of the slide block and the pressure mark on the slide block; wherein, the pressure mark can indicate the pressure by the color depth on the sliding block.
Preferably, the lateral pressure relief mechanism 14 includes a pressure relief pipe 17, and a pressure relief valve 18 and a flange head 8 which are arranged on the pressure relief pipe 17, wherein the flange head 8 is arranged at two ends of the pressure relief pipe 17, one end of the flange head is connected with a flange joint 16 arranged on the balance pipeline 7, and the other end is used for being connected with a flange joint 16 on a pressure relief pipeline 19. With this solution, a pressure relief valve 18 is provided for venting the pressure in the annular space; the pressure relief pipe 17 is provided in connection with the pressure relief pipe 19 to facilitate the discharge of toxic gases and the like to the ground.
Preferably, the pressure protection valve 10, the filling valve 12 and the pressure relief valve 18 comprise manual valves or electric valves; the electric valve is connected with the central controller through the driving controller. By adopting the technical scheme, the central controller sends a signal to the driving controller, and the driving controller controls the opening or closing of the electric valve according to the received signal; the electrically operated valve generally comprises an electric actuating mechanism and a valve, and the electrically operated valve uses electric energy as power to drive the valve through the electric actuating mechanism, so that the opening and closing actions of the valve are realized, and the aim of opening and closing the pipeline medium is fulfilled; in addition, the electric actuator comprises a partial-rotation electric actuator and a multi-rotation electric actuator, and the electric-driven multi-rotation actuator is one of the most common and reliable actuator types; the single-phase or three-phase motor is used for driving a gear or a worm gear and finally driving a valve rod nut, and the valve rod nut enables a valve rod to move to open or close the valve. The multi-rotation type electric actuating mechanism can quickly drive a large-size valve; in order to protect the valve from being damaged, a limit switch arranged at the end point of the valve stroke can cut off the power supply of the motor, meanwhile, when the safety torque is exceeded, the torque sensing device can also cut off the power supply of the motor, a position switch is used for indicating the switching state of the valve, and a hand wheel mechanism provided with a clutch device can manually operate the valve when the power supply fails. The main advantage of this type of actuator is that all the components are mounted in one housing, integrating all the basic and advanced functions in a waterproof, dustproof, explosion-proof housing. The main disadvantage is that the valve can only remain in place when the power fails and only with the backup power system can the valve achieve a fail safe position (fail-on or fail-off). In addition, this actuator is similar to an electric multi-turn actuator, with the primary difference being that the final output of the actuator is a 90 degree motion of 1/4 turns. The new generation of electric single-turn actuators combines the complex functions of most multi-turn actuators, such as: and a non-entry user-friendly operation interface is used for realizing the parameter setting and diagnosis functions. The single rotary actuator is compact and can be mounted on small size valves, typically with an output torque of up to 800 kg m, and in addition requires a small power supply, and they can be equipped with batteries for fail-safe operation.
Preferably, the pressure gauge 11 and the filling pressure gauge 13 comprise a set mechanical pressure gauge or a digital pressure gauge; and the digital pressure gauge is connected with the central controller. By adopting the technical scheme, the digital pressure gauge is used for sending a measured pressure signal to the central controller; the pressure gauge adopts an elastic element as a sensitive element, measures and indicates a gauge with pressure higher than ambient pressure, is very commonly applied, and almost extends to all fields of industrial processes and scientific researches. The method is widely available in the fields of heat pipe networks, oil and gas transmission, water and gas supply systems, vehicle maintenance plants and shops and the like; especially in the industrial process control and technical measurement process, the mechanical pressure gauge is more and more widely applied due to the characteristics of high mechanical strength, convenient production and the like of the elastic sensitive element of the mechanical pressure gauge. The digital pressure gauge combines the world leading microprocessing technology and the advanced analog-to-digital conversion algorithm to meet the requirements of high precision and low power consumption. The large screen liquid crystal display technology and the unique background light technology make the data clear and readable at night. And an import chip is adopted, the highest value is kept for instrument data acquisition, memory and measurement, and the zero is manually returned. The shell is fully sealed by stainless steel, is corrosion-resistant and vibration-resistant, and can be applied to various complex environments. The pressure of the medium to be measured is transmitted to the pressure sensing film of the sensor through the pressure interface, and the sensor amplifies the sensed electric signal, converts the signal into V/A signal, and sends the signal to the CPU for processing, setting display digit, controlling the output of switching value, and providing the output of analog quantity or digital quantity to realize the process of pressure display, control and transmission.
Preferably, the central controller comprises a main control circuit board connected with the digital pressure gauge and the electric valve and a processor arranged on the main control circuit board; the processor automatically controls the pressure protection valve 10, the perfusion valve 12 and/or the pressure relief valve 18 to be opened or closed through the received pressure signal of the digital pressure gauge and an internally set control program. By adopting the technical scheme, the central controller automatically controls the opening or closing of the valve and the opening and closing of the perfusion machine connected with the perfusion pipeline 15 according to the received pressure signal and the set control program.
Preferably, an alarm is further arranged on one side of the balance pipeline 7, and the alarm is connected with a controller and/or a pressure gauge. By adopting the technical scheme, the alarm is helpful for reminding workers, wherein the alarm adopts an acousto-optic alarm.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
When the pressure relief valve is opened, the high-pressure gas or liquid in the annular space is discharged until the pressure on the pressure gauge is displayed in the range of the prepressing value, and then the pressure protection valve and the pressure relief valve are closed; when pressure in the pressure insurance viewer shows for the low pressure, open the back of protecting and pressing the valve, make the pressure value on the manometer rise, when the pressure value shows to be less than the pressure of pre-compaction, show through the pressure of pouring into the pressure gauge with the pressure 2Mpa-5Mpa that is higher than the pressure value and fill crowded mud or filling balanced liquid through the filling valve of opening in toward the annular space by the filling machine, when the pressure on the pressure value reaches the pressure of pre-compaction, stop to fill crowded mud or filling balanced liquid, then, will fill the valve and protect and press the valve and close in proper order, thereby sealed annular space.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. The utility model provides a casing head and oil gas well head integrated device, includes base (1) and sets up casing head body (2) on base (1) and slips (3), technical casing hanger (4) and oil pipe hanger (5) of setting on casing head body (2), its characterized in that: the two sides of the casing head body (2) are symmetrically provided with balance mechanisms (6), and the balance mechanisms (6) are positioned between the slips (3) and the technical casing hanger (4) and between the technical casing hanger (4) and the oil pipe hanger (5); the balance mechanism (6) comprises a balance pipeline (7), and a flange head (8), a pressure insurance observer (9), a pressure protection valve (10), a pressure gauge (11), a filling valve (12) and a filling pressure gauge (13) which are arranged on the balance pipeline (7), wherein a lateral pressure relief mechanism (14) is arranged between the filling valve (12) and the pressure protection valve (10), and the flange head (8) is arranged at two ends of the balance pipeline (7) and is used for being connected with a flange joint (16) on the casing head body (2) and/or the filling pipeline (15);
the pressure insurance observer (9) utilizes a sensitive element in the observer to drive the sliding block to move so as to judge the pressure in the pipeline according to the moving distance of the sliding block and the pressure mark on the sliding block; wherein, the pressure mark can represent the pressure by the color depth on the sliding block;
when the pressure in the pressure insurance observer (9) shows high pressure, the pressure protection valve (10) is opened, when the pressure value in the pressure gauge (11) exceeds the pre-pressing pressure, the pressure relief valve (18) is opened, and when the pressure of the pressure gauge (11) shows in the pre-pressing value range, the pressure protection valve (10) and the pressure relief valve (18) are closed;
when pressure in the pressure insurance viewer (9) shows for the low pressure, protect pressure valve (10) and open, when pressure value in manometer (11) is less than the pressure of pre-compaction, through fill valve (12) toward annular space in the filling mud or filling balanced liquid, wait when the pressure of manometer (11) reaches the pressure of pre-compaction, stop filling mud or filling balanced liquid, fill valve (12) with protect pressure valve (10) and close.
2. The casing head and oil and gas wellhead integrated device according to claim 1, wherein: the pressure protection device is characterized by comprising a flange head (8), a pressure safety observer (9), a pressure protection valve (10), a pressure gauge (11), a lateral pressure relief mechanism (14), a filling valve (12), a filling pressure gauge (13) and the flange head (8), wherein the balance pipeline (7) is sequentially arranged.
3. The casing head and oil and gas wellhead integrated device according to claim 1, wherein: lateral pressure relief mechanism (14) include pressure release pipe (17) and set up relief valve (18) and flange head (8) on pressure release pipe (17), flange head (8) set up in the both ends of pressure release pipe (17), and flange joint (16) that set up on its one end and balanced pipeline (7) are connected, and the other end is used for being connected with flange joint (16) on pressure release pipeline (19).
4. The casing head and oil and gas wellhead integrated device according to claim 1, wherein: the pressure protection valve (10), the filling valve (12) and the pressure release valve (18) comprise manual valves or electric valves; the electric valve is connected with the central controller through the driving controller.
5. The casing head and oil and gas wellhead integrated device according to claim 1, wherein: the pressure gauge (11) and the perfusion pressure gauge (13) comprise a mechanical pressure gauge or a digital pressure gauge; and the digital pressure gauge is connected with the central controller.
6. The casing head and oil and gas wellhead integrated device as claimed in claim 4 or 5, wherein: the central controller comprises a main control circuit board connected with the digital pressure gauge and the electric valve and a processor arranged on the main control circuit board; the processor automatically controls the pressure protection valve (10), the filling valve (12) and/or the pressure relief valve (18) to be opened or closed through the received pressure signal of the digital pressure gauge and an internally set control program.
7. The casing head and oil and gas wellhead integrated device according to claim 1, wherein: and an alarm is further arranged on one side of the balance pipeline (7) and is connected with the controller and/or the pressure gauge.
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| CN201910292228.5A CN110107246B (en) | 2019-04-12 | 2019-04-12 | Oil gas well head and casing head integrated device |
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| CN201910292228.5A CN110107246B (en) | 2019-04-12 | 2019-04-12 | Oil gas well head and casing head integrated device |
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| CN110107246B true CN110107246B (en) | 2022-04-19 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110397818A (en) * | 2019-08-22 | 2019-11-01 | 天水华圆医疗器械有限公司 | A kind of multilayer shroud structure of powder material steam instantaneous sterilizing |
| CN113175309A (en) * | 2020-01-09 | 2021-07-27 | 中国石油天然气股份有限公司 | Well head safety pressure testing device |
| CN112031695B (en) * | 2020-11-05 | 2021-01-08 | 胜利油田胜机石油装备有限公司 | Gas production wellhead device and gas production well |
| CN116255467B (en) * | 2023-05-10 | 2023-07-21 | 成都成高阀门有限公司 | Double-cutoff forced sealing valve and control method thereof |
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| CN102322236A (en) * | 2011-05-31 | 2012-01-18 | 宝鸡石油机械有限责任公司 | Integrated oil casing head |
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| CN207660583U (en) * | 2017-12-20 | 2018-07-27 | 王寿明 | The anti-Integral casing head that builds the pressure |
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| MXPA06005932A (en) * | 2001-10-25 | 2007-05-07 | Pleux Ocean Systems Ltd | Clamping well casings. |
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| US5158326A (en) * | 1989-07-07 | 1992-10-27 | Cooper Industries, Inc. | Casing head connector |
| CN102704884A (en) * | 2011-03-28 | 2012-10-03 | 盐城市阳标石油机械有限公司 | Intelligentized multi-functional well head device |
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