CN117166955B - Casing head and oil gas wellhead integrated device - Google Patents
Casing head and oil gas wellhead integrated device Download PDFInfo
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- CN117166955B CN117166955B CN202311425934.5A CN202311425934A CN117166955B CN 117166955 B CN117166955 B CN 117166955B CN 202311425934 A CN202311425934 A CN 202311425934A CN 117166955 B CN117166955 B CN 117166955B
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- 238000007789 sealing Methods 0.000 claims abstract description 108
- 238000004140 cleaning Methods 0.000 claims abstract description 33
- 230000007246 mechanism Effects 0.000 claims abstract description 33
- 239000007788 liquid Substances 0.000 claims description 31
- 238000001125 extrusion Methods 0.000 claims description 7
- 230000000694 effects Effects 0.000 abstract description 14
- 239000002002 slurry Substances 0.000 abstract description 8
- 238000005065 mining Methods 0.000 abstract description 5
- 239000004576 sand Substances 0.000 description 7
- 238000010276 construction Methods 0.000 description 5
- 230000005484 gravity Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 239000010410 layer Substances 0.000 description 4
- 239000012535 impurity Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000001502 supplementing effect Effects 0.000 description 2
- 241000191291 Abies alba Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention relates to a casing head and oil gas wellhead integrated device, which belongs to the technical field of oil gas casings and comprises a casing head body, wherein the casing head body comprises an upper casing head pipe body and a lower casing head pipe body, a balance mechanism is communicated between the upper casing head pipe body and the lower casing head pipe body, and a first rotary hanger is arranged in the upper connecting pipe body, so that after the structure is adopted, the invention has the following advantages: the technical sleeve is arranged in the first hanger, the first hanger is driven to rotate by friction force, the cleaning ring is driven to clean the surface of the boss, the sealing performance between the boss and the hanger is guaranteed, and meanwhile, the hanger, the technical sleeve and the inner wall of the wellhead sleeve head body are sealed by the first sealing mechanism, the second sealing mechanism and the balancing mechanism in four ways, so that the mining can be realized without waiting for grouting slurry to seal, the effect of simultaneous grouting sealing and mining is realized, the time is saved, and the mining is not influenced.
Description
Technical Field
The invention relates to the technical field of oil and gas casings, in particular to a casing head and oil and gas wellhead integrated device.
Background
Casing head, the well head that is used for fixed drilling well promptly, connects well head casing string for support the gravity of technical sleeve pipe and reservoir sleeve pipe, sealed each inter-layer annular space provides transitional coupling for installation preventer, tubing head, christmas tree, and through two side mouths on the casing head body, can carry out construction operations such as makeup and extrusion mud, control and filling balancing liquid.
Because the well sealing assembly of the casing head takes 4-6 hours, and the solidification of cement is completed within 1-3 hours, the oil gas of the high-pressure layer is already out of the well before the casing head is assembled, so that 25% of oil wells can influence the exploitation due to gas and liquid leakage.
The utility model provides a well head casing head, is 202310760420.9 for the application number, includes the casing head body, the air chamber has been seted up to the inside top of casing head body pipe wall, the inside in air chamber is adapted with annular piston, the inside in air chamber is located annular piston's top and is provided with the spring, a plurality of return chambers have been seted up in the top mouth of air chamber a week, a plurality of gas outlets have evenly been seted up in the below department that casing head body's inner wall a week was located the air chamber, a plurality of rotation mouths have evenly been seted up in the middle department that casing head body's inner wall a week was located the air chamber, the inside of rotation mouths all is provided with the dog. The check block is extruded by the hanger to collapse and rotate, the annular piston can be rapidly pushed out to the bottom of the air cavity, so that air is compressed and rapidly discharged from the air outlet, the surface of the boss can be cleaned, and finally the sealing performance between the boss and the hanger is guaranteed.
Although the sealing performance between the boss and the hanger is guaranteed, the hanger is arranged in the inner wall of the wellhead casing head body, the technical sleeve is arranged in the hanger, and the sealing performance cannot be guaranteed among the hanger, the technical sleeve and the inner wall of the wellhead casing head body.
Disclosure of Invention
The invention aims to solve the technical problems, provides a casing head and oil gas wellhead integrated device, solves the problem of leakage of high-pressure oil gas caused by overlong consumption time in the casing head installation process, and can solve the sealing problem among a hanger, a technical casing and the inner wall of a wellhead casing head body.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
the casing head and oil gas wellhead integrated device comprises a casing head body, wherein the casing head body comprises an upper casing head pipe body and a lower casing head pipe body, the upper casing head pipe body is connected with the lower casing head pipe body in a flange manner, and a balance mechanism is communicated between the upper casing head pipe body and the lower casing head pipe body;
the upper casing head pipe body comprises an upper connecting pipe body and a lower connecting pipe body, a first rotary hanger is arranged in the upper connecting pipe body, the lower end of the first hanger is connected with a first sealing mechanism, and a second sealing mechanism is arranged between the outer side of the lower end of the upper connecting pipe body and the inner side of the upper end of the lower connecting pipe body;
the first sealing mechanism comprises a cleaning ring which is connected with the first hanger in an up-down sliding way, a sealing ring is arranged between the cleaning ring and the first hanger, an annular groove is formed in the outer side of the first hanger, a first sealing air bag is arranged in the annular groove, and the cleaning ring extrudes the first sealing air bag when sliding upwards;
the second sealing mechanism comprises a sheet spring and a second sealing air bag, wherein the sheet spring and the second sealing air bag are arranged between the upper connecting pipe body and the lower connecting pipe body, the inner side of the second sealing air bag is communicated with a spiral bulge, the spiral bulge and the sheet spring are arranged in a staggered way, non-Newtonian liquid is injected into the second sealing air bag, the non-Newtonian liquid in the second sealing air bag is extruded when the sheet spring is compressed,
the upper casing head pipe body and the lower casing head pipe body are identical in structure;
the upper connecting pipe body is internally provided with a boss below the cleaning ring, the lower end of the cleaning ring can be tightly matched with the top of the boss, the balancing mechanism comprises a gas separator, the gas outlet of the gas separator is communicated with the upper casing head pipe body through a first pipeline, the inlet of the gas separator is communicated with the lower casing head pipe body through a second pipeline, the first pipeline is positioned below the boss in the upper casing head pipe body, and the second pipeline is positioned below the boss in the lower casing head pipe body.
Preferably, a spiral groove is formed in the upper connecting pipe body, and a connecting column matched with the spiral groove for use is mounted on the outer surface of the first hanger.
Preferably, the upper end of the cleaning ring is provided with a T-shaped column, and the first hanger is provided with an extrusion hole matched with the movement of the T-shaped column and communicated with the annular groove.
Preferably, a through hole matched with the T-shaped column is formed in the sealing ring.
Preferably, the inner side of the upper end of the lower connecting pipe body is provided with a mounting hole matched with the upper connecting pipe body for mounting, and the connecting pipe body is mounted in the mounting hole in a threaded manner.
Preferably, the leaf spring and the spiral protrusion are disposed in the mounting hole and below the upper connection pipe body.
Preferably, the first pipeline and the second pipeline are both provided with a switch valve and a pressure gauge, and the position of the first pipeline, which is close to the gas outlet hole of the gas separator, is provided with a pressure release valve.
After adopting the structure, the invention has the following advantages:
the technical sleeve is arranged in the first hanger, the first hanger is driven to rotate by friction force, the cleaning ring is driven to clean the surface of the boss, the sealing performance between the boss and the hanger is ensured, and meanwhile, the hanger, the technical sleeve and the inner wall of the wellhead sleeve head body are sealed by the first sealing mechanism, the second sealing mechanism and the balancing mechanism for four ways, so that the mining can be realized without waiting for grouting slurry to seal, and the effect of simultaneous grouting sealing and mining is realized;
the sheet spring of the second sealing mechanism is compressed, the reverse acting force of the compression of the sheet spring can bear upward force against the lower connecting pipe body, so that the threads of the lower connecting pipe body and the upper connecting pipe body are locked, the second sealing air bag realizes sealing effect in the space of the mounting hole, the sealing between the lower connecting pipe body and the upper connecting pipe body is realized, meanwhile, the spiral bulge is spiral sealing, the spiral sealing has continuity and sealing performance, no break point exists in the starting process, and the sealing effect is better;
in the gas separator of the balance mechanism, under the action of gravity, the separated liquid with mechanical impurities is discharged along the shell wall of the gas separator and is discharged together with sand through the liquid discharge pipe, the gas removed from the liquid and the sand returns to the main pipe of the wellhead equipment through the first pipeline, when the liquid and the sand stop discharging from the well, the gas flow is guided back to the main well of the wellhead equipment, the separated gas can enter the well again from the first pipeline, the pressure sealing is realized on the first hanger, and meanwhile, the pressure inside the upper casing head pipe body and the lower casing head pipe body is also ensured.
The foregoing summary is for the purpose of the specification only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present invention will become apparent by reference to the drawings and the following detailed description.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the technical descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a front view of the present invention;
FIG. 3 is a cross-sectional view of the present invention from the front;
FIG. 4 is a schematic cross-sectional view of the present invention;
FIG. 5 is a schematic view of the structure of the upper casing head tube of the present invention;
FIG. 6 is a schematic view of the installation of the first hanger of the present invention;
FIG. 7 is a schematic view of the installation of the first sealing mechanism of the present invention;
FIG. 8 is an exploded view of the upper casing head tube of the present invention;
FIG. 9 is an exploded cross-sectional view of the upper casing head tube of the present invention.
As shown in the figure: 1. a casing head body; 2. a casing head pipe body is arranged; 2.1, an upper connecting pipe body; 2.2, connecting the pipe body downwards; 2.3, spiral grooves; 3. a casing head pipe body is arranged; 4. a balancing mechanism; 4.1, a gas separator; 4.2, a first pipeline; 4.3, a second pipeline; 4.4, switching the valve; 4.5, a pressure gauge; 4.6, a pressure release valve; 5. a first hanger; 5.1, a ring groove; 5.2, connecting columns; 5.3, extruding the hole; 6. a first sealing mechanism; 6.1, cleaning ring; 6.2, sealing ring; 6.3, a first sealed airbag; 6.4, a T-shaped column; 7. a second sealing mechanism; 7.1, a leaf spring; 7.2, a second sealed air bag; 7.3, spiral bulges; 8. a mounting hole; 9. a boss; 10. and a through hole.
Detailed Description
Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.
The present invention will be described in further detail in connection with the following.
Referring to fig. 1-9, a casing head and oil gas wellhead integrated device comprises a casing head body 1, wherein the casing head body 1 comprises an upper casing head pipe body 2 and a lower casing head pipe body 3, the upper casing head pipe body 2 and the lower casing head pipe body 3 are connected in a flange manner, a balance mechanism 4 is communicated between the upper casing head pipe body 2 and the lower casing head pipe body 3, sealing pressure between the upper casing head pipe body 2 and the lower casing head pipe body 3 and a first hanger 5 is regulated through the balance mechanism 4, pressure relief can be carried out when annular space pressure is higher, pressure compensation can be carried out when the annular space pressure is too low, and construction operations such as slurry compensation, monitoring and balance liquid filling are facilitated.
As shown in fig. 3, 6 and 7, the upper casing head pipe body 2 comprises an upper connecting pipe body 2.1 and a lower connecting pipe body 2.2, a first rotary hanger 5 is installed in the upper connecting pipe body 2.1, the lower end of the first hanger 5 is connected with a first sealing mechanism 6, a second sealing mechanism 7 is installed between the outer side of the lower end of the upper connecting pipe body 2.1 and the inner side of the upper end of the lower connecting pipe body 2.2, a technical casing is installed in the first hanger 5, a boss 9 is installed in the upper connecting pipe body 2.1 and below the cleaning ring 6.1, the lower end of the cleaning ring 6.1 can be in close fit with the top of the boss 9, the cleaning ring 6.1 of the first hanger 5 is pushed to rotationally clean the surface of the boss 9 through the technical casing and is in close fit with the surface of the boss 9, so that sealing is achieved.
In this embodiment, specific: as shown in fig. 3, 4, 5, 6, 8 and 9, the first sealing mechanism 6 includes a cleaning ring 6.1 slidingly connected to the first hanger 5 up and down, a spiral groove 2.3 is formed in the upper connecting pipe body 2.1, a connecting post 5.2 matched with the spiral groove 2.3 is mounted on the outer surface of the first hanger 5, when the technical sleeve is mounted in the first hanger 5, the first hanger 5 is driven to move downwards by friction force, the first hanger 5 moves in the spiral groove 2.3 through the connecting post 5.2, and in specific implementation, the connecting post 5.2 is provided with two, when the first hanger 5 moves downwards, the cleaning ring 6.1 is driven to rotate close to the boss 9 by the T-shaped post 6.4, the boss 9 is cleaned, so that the surface of the boss 9 is cleaned before being tightly matched with the cleaning ring 6.1, and finally the sealing performance between the boss 9 and the first hanger 5 is ensured, when the cleaning ring 6.1 is tightly attached to the boss 9, the T-shaped column 6.4 moves upwards to extrude the first sealing air bag 6.3, gas or non-Newtonian liquid can be injected into the first sealing air bag 6.3, a sealing ring 6.2 is arranged between the cleaning ring 6.1 and the first hanger 5, a ring groove 5.1 is formed in the outer side of the first hanger 5, the first sealing air bag 6.3 is arranged in the ring groove 5.1, when the cleaning ring 6.1 slides upwards, the first sealing air bag 6.3 is extruded, the T-shaped column 6.4 is arranged at the upper end of the cleaning ring 6.1, the extrusion hole 5.3 matched with the movement of the T-shaped column 6.4 is formed in the first hanger 5 and communicated with the ring groove 5.1, the sealing ring 6.2 is arranged on the outer side of the T-shaped column 6.4 through the extrusion hole 5.3, the limit of the sealing ring 6.2 is realized by the T-shaped column 6.4, after the first sealing air bag 6.3 is extruded under the stress, the sealing air bag 6.3 is arranged in the ring groove 5.1, the sealing air bag is realized by the first hanger 5.1, meanwhile, the cleaning ring 6.1 extrudes the sealing ring 6.2, a through hole 10 matched with the T-shaped column 6.4 is formed in the sealing ring 6.2, the sealing ring 6.2 is positioned between the technical sleeve and the upper connecting pipe body 2.1, and the sealing ring 6.2 is extruded under force to realize sealing.
In this embodiment, specific: as shown in fig. 7-9, the second sealing mechanism 7 includes a plate spring 7.1 and a second sealing air bag 7.2 between the upper connecting pipe body 2.1 and the lower connecting pipe body 2.2, the inner side of the second sealing air bag 7.2 is communicated with a spiral protrusion 7.3, the spiral protrusion 7.3 and the plate spring 7.1 are arranged in a staggered manner, the second sealing air bag 7.2 is filled with non-newton liquid, the non-newton liquid in the second sealing air bag 7.2 can be extruded when the plate spring 7.1 is compressed, the spiral protrusion 7.3 and the second sealing air bag 7.2 are communicated, the non-newton liquid is filled between the spiral protrusion 7.3 and the second sealing air bag 7.2, the spiral protrusion 7.3 and the plate spring 7.1 are arranged in a staggered manner, the plate spring 7.1 can extrude the non-newton liquid in the spiral protrusion 7.3 and the second sealing air bag 7.2, the non-newton liquid is extruded and moved when the lower connecting pipe body 2.2 is slowly and rotatably installed, abnormal vibration occurs, or the non-newton liquid can be extruded and moved when the pressure is excessively high, the non-newton liquid is stressed, the viscosity of the non-newton liquid can be increased when the pressure is increased, the viscosity of the non-newton liquid is increased, and the viscosity of the non-newton liquid can be increased when the viscosity of the non-newton liquid is increased and the viscosity of the connecting pipe is increased.
The mounting hole 8 that the connecting pipe body 2.1 was installed is offered to the inboard cooperation of upper end of lower connecting pipe body 2.2, go up connecting pipe body 2.1 screw thread and install in mounting hole 8, in the time of implementation, the lower extreme outside of going up connecting pipe body 2.1 sets up the external screw thread, set up the internal screw thread on the inner wall of mounting hole 8 of lower connecting pipe body 2.2, go up connecting pipe body 2.1 and pass through external screw thread threaded connection in mounting hole 8 of lower connecting pipe body 2.2, leaf spring 7.1 and spiral protrusion 7.3 set up in mounting hole 8 and lie in connecting pipe body 2.1 below, leaf spring 7.1 is the shape that the spring was made to the steel sheet that has elasticity, when last connecting pipe body 2.1 screw thread rotation was installed in mounting hole 8, and when moving down, leaf spring 7.1 can compress leaf spring 7.3, play three effects:
1. after the lower connecting pipe body 2.2 and the upper connecting pipe body 2.1 are in threaded installation, the opposite acting force of the compression of the sheet spring 7.1 can bear upward force against the lower connecting pipe body 2.2, so that the threads of the lower connecting pipe body 2.2 and the upper connecting pipe body 2.1 are locked;
2. the sheet spring 7.1 compresses the spiral protrusion 7.3, so that the second sealing air bag 7.2 realizes a sealing effect in the space of the mounting hole 8, and sealing between the lower connecting pipe body 2.2 and the upper connecting pipe body 2.1 is realized;
3. the spiral bulge 7.3 is a spiral seal, and compared with the step seal (in the prior art), the spiral seal has higher consistency and tightness, no break point exists in the starting middle, and the sealing effect is better.
In this embodiment, specific: as shown in fig. 1 and 2, the balancing mechanism 4 comprises a gas separator 4.1, the gas outlet hole of the gas separator 4.1 is communicated with the upper casing head pipe body 2 through a first pipeline 4.2, the inlet of the gas separator 4.1 is communicated with the lower casing head pipe body 3 through a second pipeline 4.3, the first pipeline 4.2 is positioned below a boss 9 in the upper casing head pipe body 2, the second pipeline 4.3 is positioned below the boss 9 in the lower casing head pipe body 3, the lower end of the gas separator 4.1 is connected with a liquid discharge pipe which is externally used for removing stratum water and mechanical impurity mixtures, and the component of the gas liquid flow in the gas separator 4.1 is under the centrifugal force which is radially aligned with the vertical axis of the gas separator 4.1. Under the influence of gravity, the separated liquid with mechanical impurities is discharged along the housing wall of the gas separator 4.1 and together with the sand through a drain. The gas purged from the liquid and sand is returned to the main pipe of the wellhead device via the first pipe 4.2. When the liquid and sand cease to drain from the well, the gas flow will be directed back to the main well of the wellhead.
The gas separator 4.1 may be a screw-type centrifuge or a vertical gas separator, which comprises seven separation steps in its design, has a stable separation efficiency of 99.99%, may be equipped with automatic level control and liquid discharge nodes, and heating and insulation systems, the inside diameter of the elbow for connecting the separator being equal to the inside diameter of the main wellhead of the wellhead device.
The on-off valve 4.4 and the pressure gauge 4.5 are arranged on the first pipeline 4.2 and the second pipeline 4.3, when the method is implemented, the side ports with the valves are arranged on the first pipeline 4.2 and the second pipeline 4.3 and are close to the upper connecting pipe body 2.1 and the lower connecting pipe body 2.2 which are communicated, construction operations such as slurry supplementing, monitoring and balanced liquid filling can be carried out, slurry can be injected from the side ports, sealing is formed between the two first hangers 5 and the first pipeline 4.2 or the second pipeline 4.3, namely, a wellhead for fixing a drilling well is used for supporting gravity of a technical sleeve and an oil layer sleeve, annular space between layers is sealed, when slurry at the bottom is vibrated due to oil gas exploitation, sand or gas enters from the bottom, the second pipeline 4.3 can enter the gas separator 4.1 for separation, separated gas can enter the first pipeline 4.2 again, and the pressure of the first hangers 5 can be closed through the first hangers 5, and the pressure of the first hangers 4.4.4 can be opened and closed when the pressure of the first hangers 4.4 is opened and closed, and the pressure of the first hangers 4.6 can be opened and closed, and the pressure of the first hangers 4.4 can be opened.
The pressure release valve 4.6 is arranged at the position of the first pipeline 4.2 close to the air outlet hole of the gas separator 4.1, the pressure gauge 4.5 is used for accurately displaying the pressure value among all layers of pipes, the pressure gauge 4.5 can be a mechanical pressure gauge or a digital pressure gauge, the pressure gauge 4.5 adopts an instrument which takes an elastic element as a sensitive element and measures and indicates pressure higher than the environment, the switch valve 4.4 not only can be used for protecting the pressure gauge 4.5, but also can be used for construction operations such as slurry supplementing and filling balance liquid, the pressure release valve 4.6 is used for protecting the pressure gauge 4.5 and maintaining the pressure in the upper casing head pipe body 2 and the lower casing head pipe body 3, and the two switch valves 4.4 are fixedly connected with the second pipeline 4.3 through flanges and the first pipeline 4.2, and the switch valve 4.4 is detached from the first pipeline 4.2 or the second pipeline 4.3 for maintenance or replacement.
The upper casing head pipe body 2 and the lower casing head pipe body 3 are identical in structure, and the four-way sealing effect is achieved:
1. sealing of the first hanger 5 and the upper connecting tube body 2.1 is achieved by squeezing the first sealing bladder 6.3;
2. by extruding the sealing ring 6.2, the sealing ring 6.2 is positioned between the technical sleeve and the upper connecting pipe body 2.1, and the sealing ring 6.2 is extruded by stress to realize sealing;
3. when the upper connecting pipe body 2.1 is in threaded connection with the lower connecting pipe body 2.2, the sealing effect of the upper connecting pipe body 2.1 and the lower connecting pipe body 2.2 is realized through the staggered arrangement of the second sealing air bag 7.2, the spiral bulge 7.3 and the sheet spring 7.1;
4. the balance mechanism 4 is communicated with the upper casing head pipe body 2 and the lower casing head pipe body 3, and air pressure in the upper casing head pipe body and the lower casing head pipe body is regulated, so that pressure among the hanger, the technical casing and the inner wall of the wellhead casing head body is sealed.
The working principle of the invention is as follows:
firstly, the upper connecting pipe body 2.1 is connected in the mounting hole 8 of the lower connecting pipe body 2.2 through external threads, the sheet spring 7.1 and the spiral protrusion 7.3 are arranged in the mounting hole 8 and are located below the upper connecting pipe body 2.1, the upper connecting pipe body 2.1 is rotatably mounted in the mounting hole 8 and can compress the sheet spring 7.1 when moving downwards, the sheet spring 7.1 can compress the spiral protrusion 7.3, non-Newtonian fluid in the second sealing air bag 7.2 is extruded through pressure, sealing effect between the upper connecting pipe body 2.1 and the lower connecting pipe body 2.2 is achieved, then the upper casing head pipe body 2 and the lower casing head pipe body 3 are connected together through flanges, a technical sleeve is mounted in the first hanger 5, the technical sleeve pushes the first hanger 5 to rotate in the surface of the boss 9, the cleaning ring 6.1 of the first hanger 5 rotationally cleans the surface of the boss 9, meanwhile, sealing effect between the two sides of the boss 9 is achieved through sealing effect can be achieved through sealing effect, and the two sides of a filling hole can be directly filled with slurry, and the two sides of a well can be directly monitored, and the sealing effect can be achieved.
The invention and its embodiments have been described above with no limitation, and the actual construction is not limited to the embodiments of the invention as shown throughout. In summary, if one of ordinary skill in the art is informed by this disclosure, a structural manner and an embodiment similar to the technical solution should not be creatively devised without departing from the gist of the present invention.
Claims (5)
1. The integrated device for the casing head and the oil and gas wellhead is characterized by comprising a casing head body (1), wherein the casing head body (1) comprises an upper casing head pipe body (2) and a lower casing head pipe body (3), the upper casing head pipe body (2) is connected with the lower casing head pipe body (3) in a flange manner, and a balance mechanism (4) is communicated between the upper casing head pipe body (2) and the lower casing head pipe body (3);
the upper casing head pipe body (2) comprises an upper connecting pipe body (2.1) and a lower connecting pipe body (2.2), a first rotary hanger (5) is arranged in the upper connecting pipe body (2.1), the lower end of the first hanger (5) is connected with a first sealing mechanism (6), and a second sealing mechanism (7) is arranged between the outer side of the lower end of the upper connecting pipe body (2.1) and the inner side of the upper end of the lower connecting pipe body (2.2);
the first sealing mechanism (6) comprises a cleaning ring (6.1) which is connected with the first hanger (5) in an up-down sliding way, a sealing ring (6.2) is arranged between the cleaning ring (6.1) and the first hanger (5), a ring groove (5.1) is formed in the outer side of the first hanger (5), a first sealing air bag (6.3) is arranged in the ring groove (5.1), and the cleaning ring (6.1) extrudes the first sealing air bag (6.3) when sliding upwards;
the second sealing mechanism (7) comprises a sheet spring (7.1) and a second sealing air bag (7.2) which are arranged between the upper connecting pipe body (2.1) and the lower connecting pipe body (2.2), a spiral bulge (7.3) is communicated with the inner side of the second sealing air bag (7.2), the spiral bulge (7.3) and the sheet spring (7.1) are arranged in a staggered mode, non-Newtonian liquid is injected into the second sealing air bag (7.2), and the non-Newtonian liquid in the second sealing air bag (7.2) is extruded when the sheet spring (7.1) is compressed;
the upper casing head pipe body (2) and the lower casing head pipe body (3) are identical in structure;
the upper connecting pipe body (2.1) is internally provided with a boss (9) below the cleaning ring (6.1), the lower end of the cleaning ring (6.1) can be tightly matched with the top of the boss (9), the balance mechanism (4) comprises a gas separator (4.1), a gas outlet hole of the gas separator (4.1) is communicated with the upper casing head pipe body (2) through a first pipeline (4.2), an inlet of the gas separator (4.1) is communicated with the lower casing head pipe body (3) through a second pipeline (4.3), the first pipeline (4.2) is positioned below the boss (9) in the upper casing head pipe body (2), and the second pipeline (4.3) is positioned below the boss (9) in the lower casing head pipe body (3);
the cleaning device is characterized in that a T-shaped column (6.4) is arranged at the upper end of the cleaning ring (6.1), an extrusion hole (5.3) matched with the movement of the T-shaped column (6.4) is formed in the first hanger (5), the extrusion hole (5.3) is communicated with the annular groove (5.1), a through hole (10) matched with the T-shaped column (6.4) is formed in the sealing ring (6.2), the sealing ring (6.2) is arranged on the outer side of the T-shaped column (6.4) through the extrusion hole (5.3), and the T-shaped column (6.4) limits the sealing ring (6.2);
the technical sleeve is arranged in the first hanger (5), the first hanger (5) is driven to move downwards through friction force, the cleaning ring (6.1) is driven to rotate by the T-shaped column (6.4) to be close to the boss (9), the cleaning ring (6.1) cleans the boss (9), therefore, the surface of the boss (9) is cleaned before being closely matched with the cleaning ring (6.1), the sealing performance between the boss (9) and the first hanger (5) is finally ensured, when the cleaning ring (6.1) is closely matched with the boss (9), the T-shaped column (6.4) moves upwards to squeeze the first sealing air bag (6.3), the first sealing air bag (6.3) is arranged in the annular groove (5.1), sealing of the inner wall of the first hanger (5) and the upper connecting pipe body (2.1) is achieved, meanwhile, the cleaning ring (6.1) extrudes the sealing ring (6.2) between the technical sleeve and the upper connecting pipe (2.1), and the sealing ring (6.2) is extruded, so that stress is realized.
2. The casing head and oil and gas wellhead integrated device according to claim 1, wherein: spiral groove (2.3) have been seted up in last connecting pipe body (2.1), the spliced pole (5.2) that cooperation spiral groove (2.3) used are installed to the surface of first hanger (5).
3. The casing head and oil and gas wellhead integrated device according to claim 1, wherein: the inner side of the upper end of the lower connecting pipe body (2.2) is provided with a mounting hole (8) matched with the upper connecting pipe body (2.1), and the upper connecting pipe body (2.1) is installed in the mounting hole (8) in a threaded manner.
4. A casing head and oil and gas wellhead integrated device according to claim 3, wherein: the sheet spring (7.1) and the spiral protrusion (7.3) are arranged in the mounting hole (8) and are positioned below the upper connecting pipe body (2.1).
5. The casing head and oil and gas wellhead integrated device according to claim 1, wherein: the gas separator is characterized in that a switch valve (4.4) and a pressure gauge (4.5) are arranged on the first pipeline (4.2) and the second pipeline (4.3), and a pressure release valve (4.6) is arranged at the position, close to a gas outlet hole of the gas separator (4.1), of the first pipeline (4.2).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311425934.5A CN117166955B (en) | 2023-10-31 | 2023-10-31 | Casing head and oil gas wellhead integrated device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311425934.5A CN117166955B (en) | 2023-10-31 | 2023-10-31 | Casing head and oil gas wellhead integrated device |
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| CN117166955B true CN117166955B (en) | 2024-02-02 |
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| CN104481446A (en) * | 2014-10-10 | 2015-04-01 | 中国石油天然气股份有限公司 | Hanging blanking plug |
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| CN117166955A (en) | 2023-12-05 |
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