CN115388332B - Modular combined device for skid-mounted coal bed gas wellhead - Google Patents
Modular combined device for skid-mounted coal bed gas wellhead Download PDFInfo
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- CN115388332B CN115388332B CN202211038564.5A CN202211038564A CN115388332B CN 115388332 B CN115388332 B CN 115388332B CN 202211038564 A CN202211038564 A CN 202211038564A CN 115388332 B CN115388332 B CN 115388332B
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- 239000003245 coal Substances 0.000 title claims abstract description 11
- 239000007788 liquid Substances 0.000 claims abstract description 49
- 238000000926 separation method Methods 0.000 claims abstract description 49
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000005520 cutting process Methods 0.000 claims abstract description 7
- 239000010865 sewage Substances 0.000 claims abstract description 6
- 238000005259 measurement Methods 0.000 claims description 36
- 238000012360 testing method Methods 0.000 claims description 16
- 238000009825 accumulation Methods 0.000 claims description 15
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 41
- 238000004519 manufacturing process Methods 0.000 description 9
- 238000013461 design Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000003345 natural gas Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000005526 G1 to G0 transition Effects 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/02—Pipe-line systems for gases or vapours
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/02—Valve arrangements for boreholes or wells in well heads
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/14—Arrangements for supervising or controlling working operations for eliminating water
- F17D3/145—Arrangements for supervising or controlling working operations for eliminating water in gas pipelines
Abstract
The invention provides a modular combined device for skid-mounting of a coal bed methane wellhead, which comprises a well site separation skid block, a five-way manifold skid block and a wellhead cutting, intercepting and metering integrated skid; the five-way manifold prying block and the wellhead cutting-off, intercepting and metering integrated prying block are arranged on one side of the well site separation prying block and are detachably and fixedly connected with the well site separation prying block, and the five-way manifold prying block and the wellhead cutting-off, intercepting and metering integrated prying block are detachably and fixedly connected; the well site separation pry block comprises a bottom pry A and a horizontal double-cylinder separator fixedly arranged on the bottom pry A, wherein an inlet pipeline, an air outlet pipeline, a liquid discharge pipeline, a safety discharge pipeline, a sewage pipeline and an air utilization pipeline which are connected with the horizontal double-cylinder separator are also fixedly arranged on the bottom pry A; the wellhead cutting-off, intercepting and metering integrated pry comprises a bottom pry B and a multifunctional pipeline fixedly arranged on the bottom pry B. The invention is convenient for transportation and field installation, and the function division of the three plates is reasonable, each plate has various adaptability functions, and the product has wide adaptability.
Description
Technical Field
The invention relates to a natural gas collection technology, in particular to a modular combined device for skid-mounted coal bed methane wellhead.
Background
The gas wellhead skid-mounted natural gas treatment station, gas collecting station and single well test production site for the land condensate gas field; the device is also suitable for sedimentation separation of natural gas, condensate and oil-gas mixtures produced by a wellhead platform gas well of the ocean condensate gas field, and realizes continuous metering of separated oil and gas by an instrument.
The existing coalbed methane wellhead separation sled is large in size and various in pipelines, after the design is completed, all parts are processed by manufacturers and transported to the site for assembly and fixation, so that the construction time is long, and unexpected risks such as part loss and product quality degradation are easy to occur in the assembly process.
In addition, after the coal bed gas wellhead separation sled is in the test production period and the stationary phase after the test production, it needs to connect the pipeline of different functions, like measuring pipeline, well head shut-off pipeline etc. these pipelines also need on-the-spot installation, install different pipelines moreover and still need demolish original some pipelines, so not only there is great material waste, also seriously influences well site normal operating.
Disclosure of Invention
Aiming at the problems existing in the background technology, the invention aims to provide a modular combined device for skid-mounting of a coal bed gas wellhead, which is characterized in that the skid-mounting of the coal bed gas wellhead is divided into three skid blocks which can be connected with each other through modular design, the three skid blocks can be pre-selected and processed and are convenient to transport and install on site, the function division of the three skid blocks is reasonable, each skid block has various adaptability functions, and each function can be selectively switched according to the on-site working requirement, so that the product has wide adaptability; in addition, the modularized design is convenient for ensuring the processing quality, the product can be recycled, and the cost performance is high.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a modular combined device for a coal bed gas wellhead skid-mounted comprises a well site separation skid block, a five-way manifold skid block and a wellhead cutting-off, intercepting and metering integrated skid block; the five-way manifold prying block and the wellhead cutting-off and intercepting measurement integrated prying block are arranged on one side of the well site separation prying block and are detachably and fixedly connected with the well site separation prying block, and the five-way manifold prying block and the wellhead cutting-off and intercepting measurement integrated prying block are detachably and fixedly connected;
the well site separation pry block comprises a bottom pry A and a horizontal double-cylinder separator fixedly arranged on the bottom pry A, the horizontal double-cylinder separator comprises a separation tank at the upper part and a liquid accumulation tank at the lower part, the separation tank is communicated with the liquid accumulation tank through a connecting pipe, and liquid level meters are connected to the separation tank and the liquid accumulation tank; the bottom sled A is also fixedly provided with an inlet pipeline, an air outlet pipeline, a liquid discharge pipeline, a safety discharge pipeline, a sewage discharge pipeline and an air utilization pipeline which are connected with the horizontal double-cylinder separator;
the wellhead cutting-off, intercepting and metering integrated prying block comprises a bottom pry B and a multifunctional pipeline fixedly arranged on the bottom pry B;
the five-way manifold prying block comprises a bottom pry C and a five-way pipeline fixedly arranged on the bottom pry C, wherein the five-way pipeline comprises an inlet pipe A, an inlet pipe B, an outlet pipe A, an outlet pipe B, an inlet pipe C, a four-way joint (307), a three-way joint and a connecting pipe C;
one end of the inlet pipe A is connected with a standby gas collecting pipeline, the other end of the inlet pipe A is connected with a first port of the four-way joint, one end of the inlet pipe B is connected with a third port of the four-way joint, and the other end of the inlet pipe B is connected with an inlet pipeline on the well site separation pry block;
one end of the outlet pipe A is connected with an external gas transmission pipeline, the other end of the outlet pipe A is connected with a first connector of the three-way connector, the outlet pipe B is connected with a third connector of the three-way connector, and the other end of the outlet pipe B is connected with a gas outlet pipeline on the well site separation pry block;
one end of the inlet pipe C is connected with a second port of the four-way joint, the other end of the inlet pipe C is connected with a multifunctional pipeline of the wellhead cutting-off, intercepting and metering integrated prying block, and the other end of the multifunctional pipeline is connected with a wellhead gas collecting pipeline;
one end of the connecting pipe C is connected with a fourth port of the four-way joint, and the other end of the connecting pipe C is connected with a second port of the three-way joint;
gate valves are arranged on the inlet pipe A, the inlet pipe B, the outlet pipe B and the connecting pipe C; the multifunctional pipeline is provided with an emergency stop valve;
the side parts of the bottom pry A, the bottom pry B and the bottom pry C are respectively provided with a connecting plate and are fixedly connected through the connecting plates; and the bottom pry B is provided with an intelligent control cabinet.
The multifunctional pipeline comprises an output pipeline A, an output pipeline B, a conventional measurement pipeline, a reversing switching pipeline and an intelligent measurement cutting pipeline, wherein the output ends of the output pipeline A and the output pipeline B are connected with an inlet pipe C through second connecting pipes, the input ends of the output pipeline A and the output pipeline B are connected with the output ends of the conventional measurement pipeline, the input ends of the conventional measurement pipeline are connected with the output ends of the reversing switching pipeline, and the input ends of the reversing switching pipeline are connected with the output ends of the intelligent measurement cutting pipeline; the input end of the intelligent measurement cut-off pipeline is connected with a wellhead gas collecting pipeline;
the reversing switching pipeline comprises two parallel branches, the middle part of each branch is provided with a plugging interface for connecting an external pipeline, and two ends of each branch are respectively provided with a flat gate valve.
The output pipeline A is provided with a flowmeter, and two sides of the flowmeter are respectively provided with a gate valve;
the output pipeline B is also provided with a gate valve;
the conventional measuring pipeline is provided with a first temperature transmitter and a first pressure gauge.
The intelligent measurement cutting-off pipeline comprises a test tube, one end of the test tube is connected with the wellhead gas collection pipeline, the other end of the test tube is connected with the input end of the reversing switching pipeline through a wellhead emergency cutting-off valve, and a second temperature transmitter, a thermometer, a second pressure transmitter and a second pressure gauge are arranged on the test tube;
the second temperature transmitter and the second pressure transmitter are respectively connected with a control system arranged in the intelligent control cabinet through an AD conversion module, and the control system is connected with the wellhead emergency shut-off valve through an input/output module and controls the wellhead emergency shut-off valve.
One end of the inlet pipeline is connected to the upper part of the separation tank, and the other end of the inlet pipeline is connected with an outlet pipe B on the five-way manifold pry block;
one end of the air outlet pipeline is connected to the upper part of the separation tank, and the other end of the air outlet pipeline is connected with an inlet pipe B on the five-way manifold pry block.
The liquid discharge pipeline comprises a liquid discharge main pipe A, a manual control pipe, an automatic control pipe and a liquid discharge main pipe B, wherein the input end of the liquid discharge main pipe A is connected to the lower part of the liquid accumulation tank, the output end of the liquid discharge main pipe A is respectively connected with the input ends of the manual control pipe and the automatic control pipe, the output ends of the manual control pipe and the automatic control pipe are both connected with the input end of the liquid discharge main pipe B, and the output end of the liquid discharge main pipe B is provided with an interface connected with an external pipeline; the manual control pipe is sequentially provided with a gate valve and a stop valve from an input end to an output end; the automatic control pipe is provided with a gate valve, an electric ball valve and a stop valve which are sequentially connected in series from the input end to the output end.
The gas utilization pipeline comprises a main pipeline A, a main pipeline B, an automatic control pipeline, a manual control pipeline and a pressure reducing pipe, wherein the input end of the main pipeline A is connected to the upper part of the separation tank, the output end of the main pipeline A is respectively connected with the input ends of the automatic control pipeline and the manual control pipeline, the output ends of the automatic control pipeline and the manual control pipeline are both connected to the input end of the main pipeline B, and an interface for connecting an external gas utilization pipeline is arranged on the main pipeline B;
the self-control pipeline is sequentially provided with a filter, a gate valve, an electromagnetic valve, a pressure reducing valve and a first ball valve from an input end to an output end;
the manual control pipeline is sequentially provided with a gate valve, a pressure reducing valve and a second ball valve from an input end to an output end;
one end of the pressure reducing pipe is connected with the input end of the main pipeline B through a third ball valve, the other end of the pressure reducing pipe is provided with an interface A for connecting a safety relief pipeline, and a safety valve B is arranged between the third ball valve and the interface A;
the safety relief pipeline comprises a relief main pipe, a first relief pipe, a second relief pipe, a discharge pipe and a discharge main pipe, wherein the input end of the relief main pipe is connected to the upper part of the separation tank, the output end of the relief main pipe is respectively connected with the input ends of the first relief pipe and the discharge pipe, the output ends of the first relief pipe and the discharge pipe are both connected with the discharge main pipe, the output end of the second relief pipe is connected with the discharge main pipe, and the input end of the second relief pipe is connected with an interface A of the gas pipeline;
gate valves are respectively arranged at two ends of the first pressure relief pipe, and a safety valve A is connected to the middle part of the first pressure relief pipe; the discharge pipe is provided with a gate valve and a stop valve in sequence from the input end to the output end.
One end of the liquid discharge pipeline is connected to the lower part of the liquid storage tank, and the other end of the liquid discharge pipeline is provided with an interface for connecting an external liquid discharge pipeline.
The invention has the beneficial effects that: according to the invention, the coal bed gas wellhead skid-mounted device is divided into three skid blocks which can be connected with each other, the three skid blocks can be pre-selected and processed, so that the transportation and the field installation are convenient, the function division of the three skid blocks is reasonable, each plate has multiple adaptive functions, and each function can be selectively switched according to the field work requirement, so that the product has wide adaptability; in addition, the modularized design is convenient for ensuring the processing quality, the product can be recycled, and the cost performance is high.
Drawings
FIG. 1 is a schematic diagram of the whole structure and pipeline of the present invention.
FIG. 2 is a schematic diagram showing the positional relationship between the separator tank and the liquid accumulation tank.
Fig. 3 is a schematic perspective view of a wellsite separation skid.
Fig. 4 is a schematic perspective view of a five-way manifold skid.
Fig. 5 is a schematic diagram of a three-dimensional structure of a wellhead cut-off, shut-off and metering integrated pry block.
Fig. 6 is a schematic perspective view of the safety vent.
Fig. 7 is a schematic perspective view of the air pipeline.
In the figure: 7. the intelligent control system comprises a filter, 8, an electromagnetic valve, 11, an electric ball valve, 12, a safety valve B,21, a closeable interface, 22, a flowmeter, 23, a second pressure gauge, 24, a second temperature transmitter, 25, a thermometer, 26, a second pressure transmitter, 31, an interface A,32, a safety valve A,55 and an intelligent control cabinet;
101. the device comprises a bottom sled A,102, a separating tank, 103, a liquid accumulation tank, 104 and a liquid level meter;
201. the bottom sleds B,202, input pipelines A,203, input pipelines B,204, conventional measurement pipelines 205, reversing switching pipelines 206 and intelligent measurement cut-off pipelines; 260. test tube 231, first pressure gauge, 241, first temperature transmitter, 262, wellhead emergency shut-off valve;
301. bottom sled C,302, inlet pipe a,303, inlet pipe B,304, outlet pipe a,305, outlet pipe B,306, inlet pipe C,307, four-way joint, 308, three-way joint, 309, connecting pipe C;
331. drain manifold a,332, manual control tube 333, automatic control tube 334, drain manifold B; 341. main pipelines A and 342, main pipelines B and 343, automatic control pipelines 344, manual control pipelines 345 and decompression pipes; 350. a pressure relief header 351, a first pressure relief tube 352, a second pressure relief tube 353, a drain tube 354, a drain header; 360. a liquid discharge pipeline, 370, an inlet pipeline, 380 and an air outlet pipeline.
Detailed Description
The following description of the embodiments of the present invention will be made more apparent and fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
1-7, the modular combined device for the wellhead skid-mounting of the coal bed gas comprises a well site separation skid block, a five-way manifold skid block and a wellhead cutting-off, intercepting and metering integrated skid block; the five-way manifold prying block and the wellhead cutting-off and intercepting measurement integrated prying block are arranged on one side of the well site separation prying block and are detachably and fixedly connected with the well site separation prying block, and the five-way manifold prying block and the wellhead cutting-off and intercepting measurement integrated prying block are detachably and fixedly connected;
the well site separation pry block comprises a bottom pry A101 and a horizontal double-cylinder separator fixedly arranged on the bottom pry A101, wherein the horizontal double-cylinder separator comprises an upper separation tank 102 and a lower liquid accumulation tank 103, the separation tank 102 is communicated with the liquid accumulation tank 103 through a connecting pipe, and liquid level meters 104 are connected to the separation tank 102 and the liquid accumulation tank 103; the bottom sled A101 is also fixedly provided with an inlet pipeline 370, an outlet pipeline 380, a liquid discharge pipeline, a safety discharge pipeline, a sewage pipeline 360 and a gas utilization pipeline which are connected with the horizontal double-cylinder separator;
the wellhead cutting-off, intercepting and metering integrated prying block comprises a bottom pry B201 and a multifunctional pipeline fixedly arranged on the bottom pry B201;
the five-way manifold prying block comprises a bottom pry C301 and a five-way pipeline fixedly arranged on the bottom pry C301, wherein the five-way pipeline comprises an inlet pipe A302, an inlet pipe B303, an outlet pipe A304, an outlet pipe B305, an inlet pipe C306, a four-way joint 307, a three-way joint 308 and a connecting pipe C309;
one end of the inlet pipe A302 is connected with a standby gas collecting pipeline, the other end of the inlet pipe A302 is connected with a first port of the four-way joint 307, one end of the inlet pipe B303 is connected with a third port of the four-way joint 307, and the other end of the inlet pipe B303 is connected with an inlet pipeline 370 on the well site separation pry block;
one end of the outlet pipe A304 is connected with an external gas transmission pipeline, the other end of the outlet pipe A304 is connected with a first interface of the three-way joint 308, the outlet pipe B305 is connected with a third interface of the three-way joint 308, and the other end of the outlet pipe B305 is connected with a gas outlet pipeline 380 on the well site separation pry block;
one end of the inlet pipe C306 is connected with a second port of the four-way joint 307, the other end of the inlet pipe C is connected with a multifunctional pipeline of the wellhead cutting-off, intercepting and metering integrated prying block, and the other end of the multifunctional pipeline is connected with a wellhead gas collecting pipeline;
one end of the connecting pipe C309 is connected with a fourth port of the four-way joint 307, and the other end is connected with a second port of the three-way joint 308;
the inlet pipe A302, the inlet pipe B303, the outlet pipe B305 and the connecting pipe C309 are all provided with gate valves; an emergency cut-off valve 262 is arranged on the multifunctional pipeline;
the side parts of the bottom pry A101, the bottom pry B201 and the bottom pry C301 are respectively provided with a connecting plate and are fixedly connected through the connecting plates; the bottom sled B201 is provided with an intelligent control cabinet 55.
Specifically, according to the structure, each plate in the device can be transported to site assembly after being manufactured and processed by manufacturers, at the moment, the bottom pry A101, the bottom pry B201 and the bottom pry C301 are only required to be connected into a whole, and then the corresponding interfaces of all the pipelines are connected, so that the quality can be ensured in the whole process, and the device is convenient and reliable.
Specifically, the horizontal double-cylinder separator on the well site separation pry block belongs to the prior art, so that the structure of the horizontal double-cylinder separator is not described any more, and the horizontal double-cylinder separator has the characteristics that the pipelines connected with the horizontal double-cylinder separator are reasonably configured, the functions of the pipelines are complete, and the adaptability is strong; the second feature is that the five-way manifold pry block provides different choices or redundancy after failure, for example, the feeding source can be a wellhead connected with the inlet pipe C306 or other sources connected with the inlet pipe A302, when the wellhead fails, the separator can still continue to work, when the separator fails, wellhead media can be conveyed to other separation equipment through the outlet pipe A304, so that the normal use of production equipment is maintained to the greatest extent; and the third characteristic is that the wellhead cutting-off, intercepting and metering integrated prying block integrates multiple functions of cutting-off, intercepting, metering and the like, and has the advantages of small pipeline quantity and small volume.
The multifunctional pipeline comprises an output pipeline A202, an output pipeline B203, a conventional measurement pipeline 204, a reversing switching pipeline 205 and an intelligent measurement cutting pipeline 206, wherein the output ends of the output pipeline A202 and the output pipeline B203 are connected with an inlet pipe C306 through second connecting pipes, the input ends of the output pipeline A202 and the output pipeline B203 are connected with the output end of the conventional measurement pipeline 204, the input end of the conventional measurement pipeline 204 is connected with the output end of the reversing switching pipeline 205, and the input end of the reversing switching pipeline 205 is connected with the output end of the intelligent measurement cutting pipeline 206; the input end of the intelligent measurement cut-off pipeline 206 is connected with a wellhead gas collection pipeline;
the reversing switching pipeline 205 comprises two parallel branches, the middle part of each branch is provided with a plugging interface 21 for connecting an external pipeline, and two ends of each branch are respectively provided with a flat gate valve.
The output pipeline A202 is provided with a flowmeter 22, and gate valves are respectively arranged on two sides of the flowmeter 22;
the output pipeline B203 is also provided with a gate valve;
the conventional measurement pipeline 204 is provided with a first temperature transmitter 241 and a first pressure gauge 231. Specifically, the first temperature transmitter 241 is connected to a control system disposed in the intelligent control cabinet 55 through a cable, and provides data for the control system, and the control system displays the data on a display.
The intelligent measurement cut-off pipeline 206 comprises a test tube 260, one end of the test tube 260 is connected with a wellhead gas collection pipeline, the other end of the test tube 260 is connected with the input end of the reversing switching pipeline 205 through a wellhead emergency cut-off valve 262, and a second temperature transmitter 24, a thermometer 25, a second pressure transmitter 26 and a second pressure gauge 23 are arranged on the test tube 261;
the second temperature transmitter 24 and the second pressure transmitter 26 are respectively connected with a control system arranged in the intelligent control cabinet through an AD conversion module, and the control system is connected with a wellhead emergency cut-off valve 262 through an input/output module and controls the wellhead emergency cut-off valve 262. In this part of the structure, the installation and the control of the wellhead emergency cut-off valve 262 belong to the prior art, specifically, the wellhead emergency cut-off valve 262 is installed on a wellhead gas collecting main pipeline, and is in a normally open state, and the control system is connected with the wellhead emergency cut-off valve 262 through a cable and controls the actions thereof according to the information collected by the second temperature transmitter 24 and the second pressure transmitter 26, so that the safety guarantee is provided for the production process; in addition, the specific construction and control principle of the control system are also known in the art, and will not be described herein.
In general, the conventional measurement line 204 differs from the intelligent measurement line 206 in that: the data obtained by the conventional measurement pipeline is only used for displaying and alarming, does not participate in the control of the wellhead emergency shut-off valve 262, and is suitable for a gas well with stable gas production conditions, and the pressure drop change is slow in the production process of the gas well, so that the wellhead emergency shut-off valve 262 does not need to be frequently operated; the data obtained by the intelligent measurement pipeline 206 provides a criterion for controlling the wellhead emergency shut-off valve 262, and is suitable for low-yield gas wells with unstable gas production conditions, and the pressure drop of the gas wells is rapid, so that the wellhead emergency shut-off valve 262 needs to be frequently operated. In the invention, the intelligent measuring pipeline 206 is connected with the wellhead gas collecting pipeline, so that the adaptability is stronger; the conventional measurement pipeline 204 is disposed behind the reversing switching pipeline 205, and when the reversing switching pipeline is connected to an external pipeline, the medium conveyed to the five-way manifold pry block can be still guaranteed to be detected timely.
Specifically, the multifunctional pipeline provides multiple functions, different valves can be opened and closed according to production requirements, and corresponding functional modes are selected; the reversing switching pipeline 205 provides interfaces for connecting external mechanisms at a plurality of positions, so that more functional mechanisms can be conveniently expanded and connected.
One end of the inlet pipeline 370 is connected to the upper part of the separation tank 102, and the other end is connected to the inlet pipe B303 on the five-way manifold pry block;
one end of the air outlet pipeline 380 is connected to the upper part of the separation tank 102, and the other end is connected to the outlet pipe B305 on the five-way manifold pry block.
The liquid discharge pipeline comprises a liquid discharge main pipe A331, a manual control pipe 332, an automatic control pipe 333 and a liquid discharge main pipe B334, wherein the input end of the liquid discharge main pipe A331 is connected to the lower part of the liquid accumulation tank 103, the output ends of the liquid discharge main pipe A331 are respectively connected with the input ends of the manual control pipe 332 and the automatic control pipe 333, the output ends of the manual control pipe 332 and the automatic control pipe 333 are both connected with the input end of the liquid discharge main pipe B334, and the output end of the liquid discharge main pipe B334 is provided with an interface for connecting an external pipeline; the manual control tube 332 is provided with a gate valve and a stop valve in sequence from an input end to an output end; the automatic control tube 333 is provided with a gate valve, an electric ball valve 11 and a stop valve which are sequentially connected in series from the input end to the output end. Specifically, when the valves at the two ends of the manual control tube 332 are closed, the automatic control tube 333 works, and the electric ball valve on the automatic control tube is controlled by the control system.
The gas utilization pipeline comprises a main pipeline A341, a main pipeline B342, an automatic control pipeline 343, a manual control pipeline 344 and a pressure reducing pipe 345, wherein the input end of the main pipeline A341 is connected to the upper part of the separation tank 102, the output end of the main pipeline A341 is respectively connected with the input ends of the automatic control pipeline 343 and the manual control pipeline 344, the output ends of the automatic control pipeline 343 and the manual control pipeline 344 are respectively connected to the input end of the main pipeline B342, and an interface for connecting an external gas utilization pipeline is arranged on the main pipeline B342;
the self-control pipeline 343 is sequentially provided with a filter 7, a gate valve, an electromagnetic valve 8, a pressure reducing valve and a first ball valve from an input end to an output end;
the manual control pipeline 344 is sequentially provided with a gate valve, a pressure reducing valve and a second ball valve from the input end to the output end;
one end of the pressure reducing pipe 345 is connected with the input end of the main pipeline B through a third ball valve, the other end of the pressure reducing pipe is provided with an interface A31 for connecting a safety relief pipeline, and a safety valve B12 is arranged between the third ball valve and the interface A31;
the safety relief pipeline comprises a relief main pipe 350, a first relief pipe 351, a second relief pipe 352, a discharge pipe 353 and a discharge main pipe 354, wherein the input end of the relief main pipe 350 is connected to the upper part of the separation tank 102, the output ends of the relief main pipe 350 are respectively connected with the input ends of the first relief pipe 351 and the discharge pipe 353, the output ends of the first relief pipe 351 and the discharge pipe 353 are both connected with the discharge main pipe 354, the output end of the second relief pipe 352 is connected with the discharge main pipe 354, and the input end is connected with an interface A31 of a gas pipeline;
gate valves are respectively arranged at two ends of the first pressure relief pipe 351, and a safety valve A32 is connected to the middle part of the first pressure relief pipe 351; the drain 353 is provided with a gate valve and a stop valve in order from the input end to the output end. Specifically, the first pressure relief pipe 351 can be directly vented, and when the first pressure relief pipe 351 fails, the second pressure relief pipe 352 can be opened to the passage of the safety valve B12, and the air is discharged from the safety valve B12.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
The invention is not described in detail in the prior art.
Claims (5)
1. A modular combined device for a coal bed gas wellhead skid-mounted comprises a well site separation skid block, a five-way manifold skid block and a wellhead cutting-off, intercepting and metering integrated skid block; the method is characterized in that: the five-way manifold prying block and the wellhead cutting-off and intercepting measurement integrated prying block are arranged on one side of the well site separation prying block and are detachably and fixedly connected with the well site separation prying block, and the five-way manifold prying block and the wellhead cutting-off and intercepting measurement integrated prying block are detachably and fixedly connected;
the well site separation pry block comprises a bottom pry A (101) and a horizontal double-cylinder separator fixedly arranged on the bottom pry A (101), wherein the horizontal double-cylinder separator comprises a separation tank (102) at the upper part and a liquid accumulation tank (103) at the lower part, the separation tank (102) is communicated with the liquid accumulation tank (103) through a connecting pipe, and liquid level meters (104) are connected on the separation tank (102) and the liquid accumulation tank (103); the bottom sled A (101) is also fixedly provided with an inlet pipeline (370), an outlet pipeline (380), a liquid discharge pipeline, a safety discharge pipeline, a sewage discharge pipeline (360) and a gas utilization pipeline which are connected with the horizontal double-cylinder separator;
the wellhead cutting-off, intercepting and metering integrated prying block comprises a bottom pry B (201) and a multifunctional pipeline fixedly arranged on the bottom pry B (201);
the five-way manifold prying block comprises a bottom prying C (301) and a five-way pipeline fixedly arranged on the bottom prying C (301), wherein the five-way pipeline comprises an inlet pipe A (302), an inlet pipe B (303), an outlet pipe A (304), an outlet pipe B (305), an inlet pipe C (306), a four-way joint (307), a three-way joint (308) and a connecting pipe C (309);
one end of the inlet pipe A (302) is connected with a standby gas collecting pipeline, the other end of the inlet pipe A is connected with a first port of the four-way joint (307), one end of the inlet pipe B (303) is connected with a third port of the four-way joint (307), and the other end of the inlet pipe B (303) is connected with an inlet pipeline (370) on the well site separation pry block;
one end of the outlet pipe A (304) is connected with an external gas transmission pipeline, the other end of the outlet pipe A is connected with a first interface of the three-way joint (308), the outlet pipe B (305) is connected with a third interface of the three-way joint (308), and the other end of the outlet pipe B (305) is connected with a gas outlet pipeline (380) on the well site separation pry block;
one end of the inlet pipe C (306) is connected with a second port of the four-way joint (307), the other end of the inlet pipe C is connected with a multifunctional pipeline of the wellhead cutting-off, intercepting and metering integrated prying block, and the other end of the multifunctional pipeline is connected with a wellhead gas collecting pipeline;
one end of the connecting pipe C (309) is connected with a fourth port of the four-way joint (307), and the other end of the connecting pipe C is connected with a second port of the three-way joint (308);
the inlet pipe A (302), the inlet pipe B (303), the outlet pipe B (305) and the connecting pipe C (309) are respectively provided with gate valves; an emergency cut-off valve (262) is arranged on the multifunctional pipeline;
the side parts of the bottom pry A (101), the bottom pry B (201) and the bottom pry C (301) are respectively provided with a connecting plate and are fixedly connected through the connecting plates; an intelligent control cabinet (55) is arranged on the bottom sled B (201);
the multifunctional pipeline comprises an output pipeline A (202), an output pipeline B (203), a conventional measurement pipeline (204), a reversing switching pipeline (205) and an intelligent measurement cutting pipeline (206), wherein the output ends of the output pipeline A (202) and the output pipeline B (203) are connected with an inlet pipe C (306) through second connecting pipes, the input ends of the output pipeline A (202) and the output pipeline B (203) are connected with the output end of the conventional measurement pipeline (204), the input end of the conventional measurement pipeline (204) is connected with the output end of the reversing switching pipeline (205), and the input end of the reversing switching pipeline (205) is connected with the output end of the intelligent measurement cutting pipeline (206); the input end of the intelligent measurement cut-off pipeline (206) is connected with a wellhead gas collecting pipeline;
the reversing switching pipeline (205) comprises two parallel branches, the middle part of each branch is provided with a closeable interface (21) for connecting an external pipeline, and two ends of each branch are respectively provided with a flat gate valve;
the output pipeline A (202) is provided with a flowmeter (22), and two sides of the flowmeter (22) are respectively provided with a gate valve;
the output pipeline B (203) is also provided with a gate valve;
the conventional measurement pipeline (204) is provided with a first temperature transmitter (241) and a first pressure gauge (231);
the intelligent measurement cutting-off pipeline (206) comprises a test tube (260), one end of the test tube (260) is connected with a wellhead gas collecting pipeline, the other end of the test tube is connected with the input end of the reversing switching pipeline (205) through a wellhead emergency cutting-off valve (262), and a second temperature transmitter (24), a thermometer (25), a second pressure transmitter (26) and a second pressure gauge (23) are arranged on the test tube (260);
the second temperature transmitter (24) and the second pressure transmitter (26) are respectively connected with a control system arranged in the intelligent control cabinet through an AD conversion module, and the control system is connected with a wellhead emergency cut-off valve (262) through an input/output module and controls the wellhead emergency cut-off valve (262).
2. The modular coalbed methane wellhead skid-mounted assembly as recited in claim 1, wherein: one end of the inlet pipeline (370) is connected to the upper part of the separation tank (102), and the other end is connected to the inlet pipe B (303) on the five-way manifold pry block;
one end of the air outlet pipeline (380) is connected to the upper part of the separation tank (102), and the other end of the air outlet pipeline is connected to the outlet pipe B (305) on the five-way manifold pry block.
3. The modular coalbed methane wellhead skid-mounted assembly as recited in claim 1, wherein: the liquid discharge pipeline comprises a liquid discharge main pipe A (331), a manual control pipe (332), an automatic control pipe (333) and a liquid discharge main pipe B (334), wherein the input end of the liquid discharge main pipe A (331) is connected to the lower part of the liquid accumulation tank (103), the output end of the liquid discharge main pipe A is respectively connected with the input ends of the manual control pipe (332) and the automatic control pipe (333), the output ends of the manual control pipe (332) and the automatic control pipe (333) are both connected with the input end of the liquid discharge main pipe B (334), and the output end of the liquid discharge main pipe B (334) is provided with an interface for connecting an external pipeline; the manual control tube (332) is sequentially provided with a gate valve and a stop valve from the input end to the output end; the automatic control pipe (333) is provided with a gate valve, an electric ball valve and a stop valve which are sequentially connected in series from the input end to the output end.
4. The modular coalbed methane wellhead skid-mounted assembly as recited in claim 1, wherein: the gas utilization pipeline comprises a main pipeline A (341), a main pipeline B (342), an automatic control pipeline (343), a manual control pipeline (344) and a pressure reducing pipe (345), wherein the input end of the main pipeline A (341) is connected to the upper part of the separation tank (102), the output end of the main pipeline A is respectively connected with the input ends of the automatic control pipeline (343) and the manual control pipeline (344), the output ends of the automatic control pipeline (343) and the manual control pipeline (344) are both connected to the input end of the main pipeline B (342), and an interface for connecting an external gas utilization pipeline is arranged on the main pipeline B (342);
the self-control pipeline (343) is sequentially provided with a filter (7), a gate valve, an electromagnetic valve (8), a pressure reducing valve and a first ball valve from the input end to the output end;
the manual control pipeline (344) is sequentially provided with a gate valve, a pressure reducing valve and a second ball valve from the input end to the output end;
one end of the pressure reducing pipe (345) is connected with the input end of the main pipeline B through a third ball valve, the other end of the pressure reducing pipe is provided with an interface A (31) for connecting a safety relief pipeline, and a safety valve B (12) is arranged between the third ball valve and the interface A (31);
the safety relief pipeline comprises a relief main pipe (350), a first relief pipe (351), a second relief pipe (352), a discharge pipe (353) and a discharge main pipe (354), wherein the input end of the relief main pipe (350) is connected to the upper part of the separation tank (102), the output end of the relief main pipe is respectively connected with the input ends of the first relief pipe (351) and the discharge pipe (353), the output ends of the first relief pipe (351) and the discharge pipe (353) are both connected with the discharge main pipe (354), the output end of the second relief pipe (352) is connected with the discharge main pipe (354), and the input end of the relief main pipe is connected with an interface A (31) of a gas pipeline;
gate valves are respectively arranged at two ends of the first pressure relief pipe (351), and the middle part of the first pressure relief pipe (351) is connected with a safety valve A (32); the discharge pipe (353) is provided with a gate valve and a stop valve in sequence from the input end to the output end.
5. The modular coalbed methane wellhead skid-mounted assembly as recited in claim 1, wherein: one end of the sewage pipeline (360) is connected to the lower part of the liquid accumulation tank (103), and the other end is provided with an interface for connecting an external sewage pipeline.
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| CN115388332A (en) | 2022-11-25 |
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