CN113137202A - Single-pipe wellhead flow device - Google Patents
Single-pipe wellhead flow device Download PDFInfo
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- CN113137202A CN113137202A CN202110521778.7A CN202110521778A CN113137202A CN 113137202 A CN113137202 A CN 113137202A CN 202110521778 A CN202110521778 A CN 202110521778A CN 113137202 A CN113137202 A CN 113137202A
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- 238000007789 sealing Methods 0.000 claims description 37
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 24
- 238000010438 heat treatment Methods 0.000 claims description 21
- 229910000831 Steel Inorganic materials 0.000 claims description 14
- 239000010959 steel Substances 0.000 claims description 14
- 239000010779 crude oil Substances 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 12
- 239000003345 natural gas Substances 0.000 claims description 12
- 230000008569 process Effects 0.000 claims description 11
- 238000009434 installation Methods 0.000 claims description 10
- 238000005070 sampling Methods 0.000 claims description 8
- 239000008239 natural water Substances 0.000 claims description 5
- 238000009413 insulation Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000005553 drilling Methods 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 16
- 239000012530 fluid Substances 0.000 description 11
- 238000007710 freezing Methods 0.000 description 7
- 230000008014 freezing Effects 0.000 description 7
- 238000012423 maintenance Methods 0.000 description 5
- 238000004321 preservation Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000001993 wax Substances 0.000 description 2
- 241000191291 Abies alba Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 230000007849 functional defect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
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Classifications
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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
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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
- E21B36/00—Heating, cooling or insulating arrangements for boreholes or wells, e.g. for use in permafrost zones
- E21B36/04—Heating, cooling or insulating arrangements for boreholes or wells, e.g. for use in permafrost zones using electrical heaters
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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)
- 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)
- Check Valves (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
The invention discloses a single-pipe wellhead flow device, which relates to the technical field of special equipment for oil drilling and production in oil fields and comprises a first inlet pipe, a second inlet pipe, a square body, a vertical pipe and an outlet pipe, wherein a first inlet is formed at the first end of a first channel in the first inlet pipe, and the second end of the first channel is communicated with the square body; a first end of a fourth channel in the second inlet pipe is provided with a second inlet, a second end of the fourth channel is provided with a plugging device, and the fourth channel is communicated with the square body through a fifth channel arranged in the vertical pipe; the first end of the outlet pipe is communicated with the square body, the second end of the outlet pipe is provided with an outlet, and the square body is provided with a valve body assembly; the valve body assembly comprises a single-flow stop valve and a constant-pressure air release valve, a second channel and a third channel in the square body are connected through the single-flow stop valve, and a sixth channel and a seventh channel are connected through the constant-pressure air release valve; the square body is also provided with a pressure sensor end head for installing a pressure sensor. The invention combines the single-flow valve and the stop valve into a whole, has simpler and more compact structure, saves cost and prolongs the service life.
Description
Technical Field
The invention relates to the technical field of special equipment for oil drilling and production in oil fields, in particular to a single-pipe wellhead flow device.
Background
In the low-temperature (crude oil wax precipitation) environment in winter in the north, the viscosity, rheological property, wax precipitation point and inversion point of produced liquid (crude oil, natural gas and water) of an oil production well can change along with the temperature change, and adverse factors influencing fluid transportation, such as reduction of environmental temperature, increase of paraffin precipitation, increase of crude oil viscosity, deterioration of rheological property and the like, are increased. The process of single-pipe oil collecting flow with low management and maintenance cost is adopted according to different oil collecting flow adaptive conditions for saving energy and reducing consumption of an oil field and ensuring the safety of crude oil gathering and transportation production. The single-pipe wellhead flow device is designed for a single-pipe oil collecting process, is arranged between a wellhead device and a Christmas tree and a ground conveying pipeline, and is used for flow control and switching.
With the continuous progress of oil extraction technology, the increasing need of new technology and the change of the geological condition of the oil field in the later period, the current single-pipe wellhead flow device has the following functional defects: 1. pressure data of fluid media in an on-site pipeline needs to be measured on site every day, the site for installing the single-pipe wellhead flow device is scattered in the field singly, and the farthest distance is several kilometers from a metering room where an oil extraction worker lives, so that the pressure measuring efficiency is low, and unnecessary manpower and material resource consumption is caused. At present, after a digital oil field is implemented, pressure measurement is required to be carried out on a single-pipe wellhead flow device by adopting a pressure sensor for connection and wirelessly and remotely transmitting a pressure signal to an office control terminal by a transmitter, so that a pressure sensor connector is required to be arranged on the single-pipe wellhead flow device, the connector can be prevented from freezing in an outdoor environment below a freezing point, an existing pressure gauge connector cannot be transformed and prevented from freezing, and a pressure sensor cannot normally work in a low-temperature environment in winter; 2. because the check valve and the oil outlet stop valve which are used for preventing liquid from flowing backwards on the used single-pipe wellhead flow device are two independent valves, the matched square body is increased in size and weight to cause cost increase, the heat dissipation area of the square body in a low-temperature environment in winter is large, the area during heat preservation is increased, the manufacturing and maintenance cost is increased, the heat dissipation is increased, and the concept of consumption reduction and efficiency improvement is not met; 3. when the well is shut down in operation and maintenance in a low-temperature environment in winter, the fluid in the single-pipe wellhead flow device is in a non-flowing state, and the water in the single-pipe wellhead flow device is frozen to cause the freezing and blocking of the pipeline. The pipeline blockage removal work additionally brings cost expenditure and well shut-in and production stop, so that the yield and the benefit of crude oil are influenced, and the workload of an oil extraction worker is increased.
Accordingly, it is desirable to provide a new single wellhead flow device to solve the above-mentioned problems of the prior art.
Disclosure of Invention
The invention aims to provide a single-pipe wellhead flow device, which is used for solving the problems in the prior art, combines a single-flow valve and a stop valve into a whole, has a simpler and more compact structure, saves energy, reduces consumption, saves cost, prolongs the service life, and is suitable for the reconstruction and implementation of a digital oil field.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides a single-pipe wellhead flow device which comprises a first inlet pipe, a second inlet pipe, a square body, a vertical pipe and an outlet pipe, wherein a first channel is arranged in the first inlet pipe, a first inlet is formed in the first end of the first channel and used for introducing crude oil, natural gas and water, and the second end of the first channel is communicated with the square body; a fourth channel is arranged in the second inlet pipe, a second inlet is formed in the first end of the fourth channel and used for introducing natural gas, a plugging device is arranged at the second end of the fourth channel, and the fourth channel is communicated with the square body through a fifth channel arranged in the vertical pipe; the first end of the outlet pipe is communicated with the square body, the second end of the outlet pipe is provided with an outlet, and the square body is provided with a valve body assembly;
the valve body assembly comprises a single-flow stop valve and a constant-pressure air release valve, a second channel and a third channel are arranged in the square body, the second channel and the third channel are connected through the single-flow stop valve, the second channel is communicated with the first channel, and the third channel is communicated with an eighth channel in the outlet pipe; a sixth channel and a seventh channel are further arranged in the square body, the sixth channel and the seventh channel are connected through the constant pressure air release valve, the sixth channel is communicated with the fifth channel, and the seventh channel is communicated with the third channel; the square body is also provided with a pressure sensor end through a pressure sampling valve, and the pressure sensor end is used for installing a pressure sensor.
Preferably, the single-flow stop valve comprises a valve seat, a valve body, a valve rod, a limiting movable sleeve and a sealing steel ball, the valve seat is mounted on the second channel, the valve body is mounted on the valve seat, and a connecting cavity is arranged at the bottom of the valve body and used for connecting the second channel and the third channel; the valve rod and the limiting movable sleeve are both arranged in the valve body, the valve rod is positioned above the limiting movable sleeve, and the limiting movable sleeve is connected with the valve rod in a sliding manner; a first spring is arranged between the valve rod and the limiting movable sleeve; the sealing steel ball is arranged at the bottom of the limiting movable sleeve and is positioned in the connecting cavity, and the clamping part is arranged at the bottom of the limiting movable sleeve and is used for limiting the sealing steel ball.
Preferably, the valve rod is in threaded connection with the valve body, and when the valve rod is rotated, the valve rod slides relative to the valve body along the axial direction.
Preferably, the bottom of the valve seat is provided with a framework sealing gasket which is used for being in sealing connection with the second channel; and a sealing ring is arranged on the outer wall of the valve body and is used for being in sealing connection with the square body.
Preferably, a heating device is further installed in the body.
Preferably, the heating device adopts a heating rod, the heating rod extends into the third channel, and the heating rod is connected with a power supply through a power line.
Preferably, the pressure-taking valve is a thimble type pressure-taking valve, and the thimble type pressure-taking valve is arranged in the square body; the ejector pin type pressure valve comprises a valve casing, and a sealing ring is arranged on the outer wall of the valve casing and is used for being in sealing connection with the square body; a first cavity and a second cavity are further arranged in the valve shell, the first cavity is communicated with the third channel, and a through hole is formed between the first cavity and the second cavity; a valve head is arranged in the first cavity, a first end of the valve head is conical, a thimble is arranged, and the thimble penetrates through the through hole and is used for being in contact with the end head of the pressure sensor; the second end of the valve head is connected with a second spring, and the end head of the pressure sensor is installed in the second cavity.
Preferably, the periphery of the square body is coated with an insulating layer.
Preferably, the first inlet pipe and the first outlet pipe are provided with single-well metering three-way valves.
Preferably, the first inlet pipe is also provided with a pressure measuring sampling valve.
Compared with the prior art, the invention has the following beneficial technical effects:
1. the single-pipe wellhead flow device provided by the invention combines the single-flow valve and the stop valve into a whole, has a simpler and more compact structure, saves energy and consumption, saves cost, prolongs the service life, and is suitable for the reconstruction implementation of a digital oil field;
2. the end of the pressure sensor is arranged in the square body, so that the heat preservation effect is improved, and freezing blockage is prevented;
3. the invention can also be provided with a heating device which can heat the fluid in the channel to prevent the pipeline from being frozen and blocked due to icing.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic diagram of a single wellhead flow apparatus of the present invention;
FIG. 2 is a sectional view taken along line A-A of FIG. 1;
FIG. 3 is a schematic structural diagram of a single flow stop valve according to the present invention;
FIG. 4 is a schematic view of the mounting of the pressure sensor head of the present invention;
FIG. 5 is a schematic structural view of the thimble type pressure measuring valve of the present invention;
FIG. 6 is a sectional view taken along line B-B of FIG. 1;
FIG. 7 is a schematic view of the pressure sensor installation of the present invention;
FIG. 8 is a cross-sectional view C-C of FIG. 1;
in the figure: 1. a clamp head; 2. a single flow stop valve; 2-1 valve stem; 2-2, a first spring; 2-3, a valve body; 2-4, a limiting movable sleeve; 2-5, sealing the steel ball; 2-6, valve seats; 2-7, a framework sealing gasket; 3. a square body; 4. a heating rod; 5. plugging with a thread; 6. a riser; 7. a pressure measuring sampling valve; 8. a constant pressure air release valve; 9. a single well metering three-way valve; 10. a thimble type pressure valve; 10-1, a valve shell; 10-2, O-shaped sealing rings; 10-3 valve heads; 10-4, a second spring; 11. a pressure sensor tip; a. a first channel; b. a second channel; c. a third channel; d. a fourth channel; e. a fifth channel; f. a sixth channel; g. a seventh channel; h. and an eighth channel.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a single-pipe wellhead flow device, which is used for solving the problems in the prior art, combines a single-flow valve and a stop valve into a whole, has simpler and more compact structure, saves energy, reduces consumption, saves cost, prolongs the service life, and is suitable for the reconstruction and implementation of a digital oil field.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1-8, the embodiment provides a single wellhead flow device, which includes a first inlet pipe, a second inlet pipe, a cube 3, a riser 6 and an outlet pipe, wherein the first inlet pipe is provided with a first channel a, a first end of the first channel a is provided with a first inlet for introducing crude oil, natural gas and water, and a second end of the first channel a is communicated with the cube 3; a fourth channel d is arranged in the second inlet pipe, a second inlet is formed in the first end of the fourth channel d and used for introducing natural gas, and a plugging device is arranged at the second end and used for plugging the second end of the fourth channel d, wherein the plugging device only needs to adopt a conventional plug 5; the fourth channel d is communicated with the square body 3 through a fifth channel e arranged in the vertical pipe 6; the first end and the square body 3 intercommunication of exit tube, the second end is provided with the export, installs the valve body subassembly on the square body 3.
Specifically, the valve body assembly comprises a single-flow stop valve 2 and a constant-pressure air release valve 8, a second channel b and a third channel c are arranged in the square body 3, the second channel b and the third channel c are connected through the single-flow stop valve 2, the second channel b is communicated with the first channel a, and the third channel c is communicated with an eighth channel h in the outlet pipe; this embodiment makes up into single current stop valve 2 with single current valve and stop valve, and the structure is simple compacter, and is not fragile, reduces maintenance and maintenance cost, increase of service life. A sixth channel f and a seventh channel g are further arranged in the square body 3, the sixth channel f and the seventh channel g are connected through a constant pressure air release valve 8, the sixth channel f is communicated with a fifth channel e, and the seventh channel g is communicated with a third channel c; the square body 3 is also provided with a pressure sensor end 11 through a pressure sampling valve, and the pressure sensor end 11 is used for installing a pressure sensor.
In the embodiment, the first ends of the first channel a and the fourth channel d are respectively provided with a clamp head 1 for connecting with a wellhead device; crude oil, natural gas and water are introduced into the first channel a through the first inlet, then the crude oil, the natural gas and the water enter the second channel b, the single-flow stop valve 2 is opened, the crude oil, the natural gas and the water enter the third channel c, and then the crude oil, the natural gas and the water are discharged through the eighth channel h; and natural gas is introduced into the fourth channel d through the second inlet, enters the fifth channel e and the sixth channel f, then pushes the constant pressure deflation valve 8 to open, enters the seventh channel g, is communicated with the third channel c in a tangent mode, and is mixed with the fluid entering from the first inlet after entering the third channel c and then is discharged through the eighth channel h.
In the embodiment, the single-flow stop valve 2 comprises a valve seat 2-6, a valve body 2-3, a valve rod 2-1, a limiting movable sleeve 2-4 and a sealing steel ball 2-5, wherein the valve seat 2-6 is arranged on a second channel b, the valve body 2-3 is arranged on the valve seat 2-6, and the bottom of the valve body 2-3 is provided with a connecting cavity for connecting the second channel b and a third channel c; the valve rod 2-1 and the limiting movable sleeve 2-4 are both arranged in the valve body 2-3, the valve rod 2-1 is positioned above the limiting movable sleeve 2-4, the limiting movable sleeve 2-4 is connected with the valve rod 2-1 in a sliding mode, specifically, a sliding key is arranged on the inner side of the bottom of the valve rod 2-1, a sliding groove is arranged on the outer side of the top of the limiting sliding sleeve, the limiting movable sleeve 2-4 is connected with the valve rod 2-1 in a sliding mode through the sliding key and the sliding groove, and other sliding structures can be selected according to work requirements. A first spring 2-2 is arranged between the valve rod 2-1 and the limiting movable sleeve 2-4, a sealing steel ball 2-5 is arranged at the bottom of the limiting movable sleeve 2-4 and is positioned in the connecting cavity, a clamping part is arranged at the bottom of the limiting movable sleeve 2-4 and is used for limiting the sealing steel ball 2-5, the clamping part is triangular and extends inwards, and the sealing steel ball 2-5 can rotate in the limiting movable sleeve 2-4. Further, a framework sealing gasket 2-7 is arranged at the bottom of the valve seat 2-6 and is used for being in sealing connection with the second channel b; and a sealing ring is arranged on the outer wall of the valve body 2-3 and is used for being in sealing connection with the square body 3.
In a working state, fluid in the second channel b enters the connecting cavity through the framework sealing gaskets 2-7 and the channel in the middle of the valve seats 2-6, the sealing steel balls 2-5 are pushed to drive the limiting movable sleeves 2-4 to move, the single-flow stop valve 2 is opened, and the fluid enters the third channel c; at this time, the single flow stop valve 2 realizes a single flow function.
In the embodiment, the valve rod 2-1 is in threaded connection with the valve body 2-3, when the valve rod 2-1 is rotated in the forward direction, the valve rod 2-1 slides axially relative to the valve body 2-3, at the moment, the valve rod 2-1 slides rightwards relative to the limiting movable sleeve 2-4, and when the valve rod 2-1 and the limiting movable sleeve 2-4 are in rigid contact, the sealing steel ball 2-5 is sealed with the valve seat 2-6, so that a stop function is realized. When the valve rod 2-1 is rotated reversely, the sliding key on the valve rod 2-1 drives the limiting movable sleeve 2-4 to move leftwards, and the clamping part drives the sealing steel ball 2-5 to move leftwards until the single-flow stop valve 2 is completely opened, so that the function of completely opening is realized.
In the embodiment, when the valve rod 2-1 is rotated in the forward direction, the valve rod 2-1 moves rightwards to compress the first spring 2-2, and the pre-tightening force of the first spring 2-2 is adjusted by rotating the valve rod 2-1, so that the pre-tightening function is realized.
In the embodiment, a heating device is further arranged in the square body 3, and the heating device is arranged to heat fluid in the channel, so that freezing and blocking of the pipeline caused by freezing are prevented; wherein, heating device adopts heating rod 4, and heating rod 4 can select electrical heating rod or electromagnetic heating rod, and heating rod 4 stretches into in the third passageway c, and heating rod 4 is connected with the power through the power cord.
In this embodiment, the pressure-taking valve is a thimble type pressure-taking valve 10, and the thimble type pressure-taking valve 10 is installed in the square body 3; the thimble type pressure valve 10 comprises a valve casing 10-1, wherein a sealing ring is arranged on the outer wall of the valve casing 10-1 and is used for being in sealing connection with the square body 3, and the sealing ring is an O-shaped sealing ring 10-2; a first cavity and a second cavity are further arranged in the valve shell 10-1, the first cavity is communicated with the third channel c, and a through hole is formed between the first cavity and the second cavity; a valve head 10-3 is arranged in the first cavity, the first end of the valve head 10-3 is conical and is provided with a thimble, and the thimble penetrates through the through hole and is used for contacting with the end head 11 of the pressure sensor; the second end of the valve head 10-3 is connected with a second spring 10-4, and a pressure sensor end 11 is arranged in a second cavity.
In the embodiment, when the pressure sensor end 11 is not installed, under the action of the second spring 10-4, the first end of the valve head 10-3 seals the through hole, so that the first cavity and the second cavity cannot be communicated, and fluid cannot enter the second cavity; when the pressure sensor end 11 is installed, the pressure sensor end 11 contacts the ejector pin and pushes the valve head 10-3 to compress the second spring 10-4, the ejector pin type pressure valve 10 is opened, and fluid enters the second cavity.
In the embodiment, the pressure sensor end 11 is arranged in the second cavity, namely the square body 3, so that the heat preservation effect is improved; and fluid flow also can bring the heat, keeps warm to pressure sensor end 11, and the periphery of square body 3 is wrapped with the heat preservation, further improves the heat preservation effect, prevents to freeze stifled.
In the embodiment, a single-well metering three-way valve 9 is arranged on the first inlet pipe and the first outlet pipe, and a pressure measuring sampling valve 7 is also arranged on the first inlet pipe; wherein, the single-well metering three-way valve 9 and the pressure measuring sampling valve 7 can be selected from the prior art according to the working requirement.
The principle and the implementation mode of the invention are explained by applying specific examples, and the description of the above examples is only used for helping understanding the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In summary, this summary should not be construed to limit the present invention.
Claims (10)
1. A single-pipe wellhead flow device is characterized in that: the device comprises a first inlet pipe, a second inlet pipe, a cube, a vertical pipe and an outlet pipe, wherein a first channel is arranged in the first inlet pipe, a first inlet is formed in the first end of the first channel and used for introducing crude oil, natural gas and water, and the second end of the first channel is communicated with the cube; a fourth channel is arranged in the second inlet pipe, a second inlet is formed in the first end of the fourth channel and used for introducing natural gas, a plugging device is arranged at the second end of the fourth channel, and the fourth channel is communicated with the square body through a fifth channel arranged in the vertical pipe; the first end of the outlet pipe is communicated with the square body, the second end of the outlet pipe is provided with an outlet, and the square body is provided with a valve body assembly;
the valve body assembly comprises a single-flow stop valve and a constant-pressure air release valve, a second channel and a third channel are arranged in the square body, the second channel and the third channel are connected through the single-flow stop valve, the second channel is communicated with the first channel, and the third channel is communicated with an eighth channel in the outlet pipe; a sixth channel and a seventh channel are further arranged in the square body, the sixth channel and the seventh channel are connected through the constant pressure air release valve, the sixth channel is communicated with the fifth channel, and the seventh channel is communicated with the third channel; the square body is also provided with a pressure sensor end through a pressure sampling valve, and the pressure sensor end is used for installing a pressure sensor.
2. The single pipe wellhead process installation according to claim 1 wherein: the single-flow stop valve comprises a valve seat, a valve body, a valve rod, a limiting movable sleeve and a sealing steel ball, wherein the valve seat is arranged on the second channel, the valve body is arranged on the valve seat, and the bottom of the valve body is provided with a connecting cavity for connecting the second channel and the third channel; the valve rod and the limiting movable sleeve are both arranged in the valve body, the valve rod is positioned above the limiting movable sleeve, and the limiting movable sleeve is connected with the valve rod in a sliding manner; a first spring is arranged between the valve rod and the limiting movable sleeve; the sealing steel ball is arranged at the bottom of the limiting movable sleeve and is positioned in the connecting cavity, and the clamping part is arranged at the bottom of the limiting movable sleeve and is used for limiting the sealing steel ball.
3. The single pipe wellhead process installation according to claim 2, wherein: the valve rod is in threaded connection with the valve body, and when the valve rod is rotated, the valve rod slides relative to the valve body along the axial direction.
4. The single pipe wellhead process installation according to claim 3, wherein: a framework sealing gasket is arranged at the bottom of the valve seat and is used for being in sealing connection with the second channel; and a sealing ring is arranged on the outer wall of the valve body and is used for being in sealing connection with the square body.
5. The single pipe wellhead process installation according to claim 1 wherein: and a heating device is also arranged in the square body.
6. The single pipe wellhead process installation according to claim 5, wherein: the heating device adopts a heating rod, the heating rod extends into the third channel, and the heating rod is connected with a power supply through a power line.
7. The single pipe wellhead process installation according to claim 1 wherein: the pressure-taking valve adopts a thimble type pressure-taking valve which is arranged in the square body; the ejector pin type pressure valve comprises a valve casing, and a sealing ring is arranged on the outer wall of the valve casing and is used for being in sealing connection with the square body; a first cavity and a second cavity are further arranged in the valve shell, the first cavity is communicated with the third channel, and a through hole is formed between the first cavity and the second cavity; a valve head is arranged in the first cavity, a first end of the valve head is conical, a thimble is arranged, and the thimble penetrates through the through hole and is used for being in contact with the end head of the pressure sensor; the second end of the valve head is connected with a second spring, and the end head of the pressure sensor is installed in the second cavity.
8. The single pipe wellhead process installation according to claim 1 wherein: the periphery of the square body is coated with a heat insulation layer.
9. The single pipe wellhead process installation according to claim 1 wherein: and the first inlet pipe and the outlet pipe are provided with single-well metering three-way valves.
10. The single pipe wellhead process installation according to claim 1 wherein: and the first inlet pipe is also provided with a pressure measuring sampling valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110521778.7A CN113137202B (en) | 2021-05-13 | 2021-05-13 | Single-pipe wellhead flow device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110521778.7A CN113137202B (en) | 2021-05-13 | 2021-05-13 | Single-pipe wellhead flow device |
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| Publication Number | Publication Date |
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| CN113137202A true CN113137202A (en) | 2021-07-20 |
| CN113137202B CN113137202B (en) | 2022-04-19 |
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| CN202110521778.7A Active CN113137202B (en) | 2021-05-13 | 2021-05-13 | Single-pipe wellhead flow device |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN201007195Y (en) * | 2007-02-02 | 2008-01-16 | 穆洪义 | Annular self thermal insulation anti-freeze well head packaging group valve |
| CN201206450Y (en) * | 2008-01-18 | 2009-03-11 | 付尚鹏 | Antifreezing and collection transmitting process device of oil production well special for oilfield |
| CN201187274Y (en) * | 2008-04-02 | 2009-01-28 | 刘曦宇 | Single tube annular process flow well head composite device |
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| CN210398050U (en) * | 2019-08-29 | 2020-04-24 | 常州同敏机械科技有限公司 | Piston pressure measuring joint |
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| CN113137202B (en) | 2022-04-19 |
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