CN113202447B - Water-mixing flow combined wellhead device - Google Patents
Water-mixing flow combined wellhead device Download PDFInfo
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- CN113202447B CN113202447B CN202110684044.0A CN202110684044A CN113202447B CN 113202447 B CN113202447 B CN 113202447B CN 202110684044 A CN202110684044 A CN 202110684044A CN 113202447 B CN113202447 B CN 113202447B
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- valve
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- inlet pipe
- watering
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- 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
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- 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
- E21B36/00—Heating, cooling, insulating arrangements for boreholes or wells, e.g. for use in permafrost zones
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- 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
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
Abstract
The invention discloses a water mixing flow combined wellhead device, which relates to the technical field of oil field oil drilling and production accessories and comprises an oil inlet pipe, an air inlet pipe, an oil inlet pipe and an oil outlet pipe, wherein the oil inlet pipe and the air inlet pipe are respectively communicated with the water inlet pipe, the inlet of the oil inlet pipe is connected with a crude oil pipeline, the outlet of the oil inlet pipe is connected with the oil outlet pipe, a water mixing valve is arranged at the joint of the oil inlet pipe and the water inlet pipe, and the oil outlet pipe is provided with a total oil return valve. The water mixing valve can effectively control the water inflow of hot water, and the oil on the oil outlet pipe can be prevented from returning through the main oil return valve.
Description
Technical Field
The invention relates to the technical field of oil field petroleum drilling and production accessories, in particular to a water-mixing flow combined wellhead device.
Background
The produced fluid of the mechanical production well in winter in the north can generate the conditions of reduced viscosity, poor rheological property, reduced wax precipitation point, increased precipitation and the like which influence the fluid flow due to the reduction of the environmental temperature. The phenomena cause the shrinkage of the conveying pipeline and even the freezing and blocking of the conveying pipeline caused by crude oil condensation, paraffin precipitation and the like. The pressure for conveying crude oil is increased, and the oil production cost is increased. Therefore, part of the crude oil gathering and transportation process adopts a hot water mixing flow. With the progress of an oil extraction process and the development of a digital oil field, the existing water-mixing flow combined wellhead device has three functional defects, one is that the water-mixing flow combined wellhead device is not provided with a check valve, namely, produced liquid has no check flow function from an inlet of the device to an outlet pipeline of the device, and when the fluid input pressure of the inlet is smaller than the output pressure of the outlet, the produced liquid can flow backwards; secondly, the water mixing valve on the water mixing valve can only realize the rough adjustment (rough adjustment) of the water mixing amount, and the fluctuation of the hot water amount mixed into the crude oil is large, thereby causing unnecessary waste; thirdly, with the wide popularization needs of the digital oil field, the mode of measuring the pressure of the fluid medium in the pipeline is changed from the original manual operation of using a pressure gauge and a valve every day into the current wireless remote transmission digital online real-time measurement of a pressure sensor and a transmitter, the current water mixing flow combined wellhead device is not provided with a corresponding special interface for the pressure sensor, the temporarily modified interfaces of the pressure sensor are exposed under the outdoor low-temperature environment, the interfaces are easy to freeze, and the pressure of the fluid medium in the pipeline cannot be measured.
Therefore, a water mixing flow combined wellhead device is urgently needed in the market for solving the technical problems.
Disclosure of Invention
The invention aims to provide a water mixing flow combined wellhead device, which is used for solving the technical problems in the prior art, a water mixing valve is arranged to effectively control the water mixing amount of hot water, and a main oil return valve can avoid the oil return phenomenon of oil on an oil outlet pipe.
In order to achieve the purpose, the invention provides the following scheme:
the invention discloses a water mixing flow combined wellhead device which comprises an oil inlet pipe, an air inlet pipe, an oil inlet pipe and an oil outlet pipe, wherein the oil inlet pipe and the air inlet pipe are respectively communicated with the water inlet pipe, the inlet of the oil inlet pipe is connected with a crude oil pipeline, the outlet of the oil inlet pipe is connected with the oil outlet pipe, a water mixing valve is arranged at the joint of the oil inlet pipe and the water inlet pipe, and a total oil return valve is arranged on the oil outlet pipe.
Preferably, the watering valve comprises a watering valve seat, the watering valve seat is fixed on the pipe wall of the oil inlet pipe, the watering valve seat is provided with a first channel, the first channel of the watering valve seat is communicated with the oil inlet pipe, one end of the watering valve seat is fixedly connected with a watering valve body, the side wall of the watering valve body is provided with a second channel, the second channel is communicated with the water inlet pipe, the first channel and the second channel can be communicated, the inner wall of the watering valve body is provided with an internal thread, the inner wall of the watering valve body is in threaded connection with a rough adjustment valve rod, the outer wall of the rough adjustment valve rod is provided with an external thread, the head of the rough adjustment valve rod is fixed with a rough adjustment valve head, the tail of the rough adjustment valve rod penetrates out of the watering valve body, the side wall of the rough adjustment valve head is provided with a third channel, and the third channel can be communicated with the second channel, the head of the coarse adjustment valve head is provided with a fourth channel, the fourth channel is communicated with the first channel, the fourth channel can be communicated with the third channel, the inner wall of the coarse adjustment valve rod is provided with an internal thread, the inner wall of the coarse adjustment valve rod is in threaded connection with a fine adjustment valve rod, the outer wall of the fine adjustment valve rod is provided with an external thread, the head of the fine adjustment valve rod can enter the fourth channel, and the tail of the fine adjustment valve rod penetrates out of the tail of the coarse adjustment valve rod.
Preferably, a first rotating nut is fixed at the tail part of the coarse adjustment valve rod, and a metal plate handle is fixed at the tail part of the fine adjustment valve rod.
Preferably, the rough adjusting valve head is fixed on the outer side of the rough adjusting valve rod through a limit screw.
Preferably, the total oil return valve comprises an oil return valve seat, the oil return valve seat is fixed at one end of the oil inlet pipe close to the oil outlet pipe, a fifth channel is arranged on the oil return valve seat, the fifth channel is communicated with the oil inlet pipe, a sixth channel is arranged on the side wall of the oil return valve seat, a first flow direction cavity is arranged in the oil return valve seat, the sixth channel and the fifth channel are both communicated with the first flow direction cavity, the sixth channel is communicated with the oil outlet pipe, an oil return valve body is fixed at one end of the oil return valve seat far away from the oil inlet pipe, a second flow direction cavity is arranged in the oil return valve body, the first flow direction cavity is communicated with the second flow direction cavity, a single flow valve head is slidably connected in the first flow direction cavity, the fifth channel can be plugged by the first end of the single flow valve head, and a first telescopic groove is arranged at the second end of the single flow valve head, the second end of single current valve head stretches into in the flexible recess of second on the lead screw, first flexible recess with the flexible recess of second is linked together, the tank bottom of first flexible recess with the tank bottom of the flexible recess of second is fixed in the both ends of spring respectively, the outer wall of lead screw has the external screw thread, the second is flowed to and is equipped with the internal thread on the inner wall of cavity, lead screw threaded connection in the second flows to the cavity.
Preferably, one end of the screw rod, which is far away from the oil return valve seat, is fixed with a second rotating nut, and the second rotating nut is located on the outer side of the oil return valve body.
Preferably, a water mixing check valve, a main water inlet pipe and a hot washing valve are arranged on the water inlet pipe.
Preferably, a constant pressure air release valve is arranged on the air inlet pipe.
Preferably, the oil inlet pipe is provided with a two-way sealing pressure measuring plug, the two-way sealing pressure measuring plug comprises a pressure measuring body, a ninth channel is arranged in the pressure measuring body, the ninth channel penetrates through the pressure measuring body, a pressure guide valve rod is connected with the ninth channel in an internal thread manner, a locking nut and a single valve head are sequentially installed at the first end of the pressure guide valve rod, a sensor installation hole is formed in the second end of the pressure guide valve rod and used for installing a pressure sensor, an eighth channel is arranged in the pressure guide valve rod and communicated with the sensor installation hole, a plurality of pressure measuring holes are formed in the side wall of the pressure guide valve rod and communicated with the eighth channel, a first shoulder and a second shoulder are arranged in the ninth channel, the first shoulder can abut against the bulge of the single valve head, and the second shoulder can abut against the bulge of the pressure guide valve rod, and an oil drainage hole is formed in the pressure measuring body.
The invention also discloses a water mixing method of the water mixing flow combined wellhead device, which comprises the following steps:
when hot water is required to be added into the oil inlet pipe, the hot water enters from the water inlet pipe, sequentially passes through the main water inlet valve, the water mixing check valve and the water mixing valve, then is converged with the oil inlet pipe, and flows out of the oil outlet pipe after passing through the main oil return valve;
when the crude oil needs to be directly discharged, the crude oil enters from the oil inlet pipe and flows out from the oil outlet pipe after passing through the main oil return valve;
when the pressure of the sleeve gas is greater than the pressure value set by the constant-pressure deflation valve, the natural gas flows to the constant-pressure deflation valve from the gas inlet pipe and flows out of the oil outlet pipe after passing through the main oil return valve;
when the well needs to be washed by hot water, the hot water enters from the water inlet pipe, sequentially passes through the main water inlet valve and the hot washing valve and then flows out from the air inlet pipe;
when hot water is needed to directly carry out hot washing on the oil outlet pipe, the hot water enters from the water inlet pipe, sequentially passes through the main water inlet valve and the straight-through valve and then flows out of the oil outlet pipe.
Compared with the prior art, the invention has the following technical effects:
the invention is provided with a total oil return valve, and one valve integrates two functions of check and stop of a single flow; the pipeline can be shut off, and the situation that liquid in the pipeline flows back and flows backwards is avoided under the condition that the pressure at the inlet end of the device is reduced. The water mixing valve is integrated with a secondary fine adjusting valve, namely, one valve has two functions of rough adjustment and fine adjustment, and after the water mixing flow is roughly adjusted, the fine adjusting valve is rotated to finely adjust the water mixing amount.
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 structural diagram of a combined wellhead assembly for a watering process according to the present embodiment;
FIG. 2 is a left side view of FIG. 1;
FIG. 3 is a top view of FIG. 1;
FIG. 4 is a sectional view A-A of FIG. 3;
FIG. 5 is a cross-sectional view B-B of FIG. 3;
FIG. 6 is a schematic structural view of the watering valve of the present embodiment;
FIG. 7 is a schematic structural view of a main oil return valve in the present embodiment;
FIG. 8 is a schematic structural view of the two-way sealing pressure tap of the present embodiment;
FIG. 9 is a schematic view of the working state of the bidirectional sealing pressure measuring plug in the present embodiment;
FIG. 10 is a schematic view showing a state of maintenance of the bidirectional sealing pressure tap according to the present embodiment;
fig. 11 is a process flow diagram of the watering flow combination wellhead of this embodiment.
In the figure: an oil inlet pipe-1, an air inlet pipe-2, a water inlet pipe-3, an oil outlet pipe-4, a total oil return valve-5, an oil return valve seat-51, a single flow valve head-52, a spring-53, a screw-54, an oil return valve body-55, a water mixing valve-6, a water mixing valve seat-61, a coarse mixing valve head-62, a limit screw-63, a coarse mixing valve rod-64, a fine mixing valve rod-65, a water mixing valve body-66, a metal plate handle-67, a water mixing single flow valve-7, a first channel-71, a second channel-72, a third channel-73, a fourth channel-74, a fifth channel-75, a sixth channel-76, a seventh channel-77, an eighth channel-78, a ninth channel-79, a hot washing valve-8, a constant pressure air release valve-9, The pressure measuring valve comprises a main water valve-10, a straight-through valve-11, a two-way sealing pressure measuring plug-12, a pressure measuring body-121, a first shoulder-1211, a second shoulder-1212, a pressure guide valve rod-122, a single valve head-123, a locking nut-124, an integrated box-13 and a pressure sensor-14.
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 water mixing flow combined wellhead device, which is used for solving the technical problems in the prior art, a water mixing valve is arranged to effectively control the water mixing amount of hot water, and a main oil return valve can avoid the oil return phenomenon of oil on an oil outlet pipe.
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. 1-7, the present embodiment provides a water-blending flow combined wellhead device, which includes an oil inlet pipe 1, an air inlet pipe 2, an water inlet pipe 3 and an oil outlet pipe 4, wherein the oil inlet pipe 1 and the air inlet pipe 2 are respectively communicated with the water inlet pipe 3, and an inlet of the oil inlet pipe 1 is connected with a crude oil pipeline for introducing crude oil. The outlet of the oil inlet pipe 1 is connected with an oil outlet pipe 4. One end of the water inlet pipe 3 is connected with a hot water source, and one end of the air inlet pipe 2 is connected with a natural gas output end. The joint of the oil inlet pipe 1 and the water inlet pipe 3 is provided with a water mixing valve 6, and the oil outlet pipe 4 is provided with a total oil return valve 5.
When the device is used, hot water is conveyed into the oil inlet pipe before crude oil and natural gas are conveyed, and the device is used for conveying hot water into the oil inlet pipe. The water mixing valve 6 can effectively control the water mixing amount of hot water added into crude oil, and the total oil return valve 5 can avoid the backflow phenomenon of the oil outlet pipe 4.
Regarding the specific structure of the watering valve 6, in this embodiment, the watering valve 6 includes a watering valve seat 61, the watering valve seat 61 is fixed on the pipe wall of the oil inlet pipe 1, the watering valve seat 61 has a central through hole, the central through hole is a first channel 71, the first channel 71 penetrates through the entire watering valve seat 61, and the first channel 71 of the watering valve seat 61 is communicated with the oil inlet pipe 1. One end of the watering valve seat 61 is fixedly connected with a watering valve body 66, and the watering valve body 66 is of a sleeve structure. The side wall of the watering valve body 66 is provided with a plurality of second channels 72, the plurality of second channels 72 are uniformly distributed along the side wall of the watering valve body 66, the second channels 72 are communicated with the water inlet pipe 3, and the first channels 71 can be communicated with the second channels 72. In practical use, a watering sleeve is fixed on the outer wall of the watering valve body 66, the watering sleeve is provided with a passage connected with the water inlet pipe 3, and after hot water in the water inlet pipe 3 enters the watering sleeve, the hot water flows into the watering valve body 66 from a plurality of second passages 72 and finally flows out from the first passage 71. The inner wall of the water mixing valve body 66 is provided with internal threads, the inner wall of the water mixing valve body 66 is connected with a rough adjusting valve rod 64 in a threaded mode, the rough adjusting valve rod 64 is of a sleeve structure, the outer wall of the rough adjusting valve rod 64 is provided with external threads, the head of the rough adjusting valve rod 64 is fixed with a rough adjusting valve head 62, the head of the rough adjusting valve head 62 is of a conical structure, the head of the rough adjusting valve head 62 can block the first channel 71, the tail of the rough adjusting valve rod 64 penetrates out of the water mixing valve body 66, and a user can drive the rough adjusting valve rod 64 to rotate by rotating the tail of the rough adjusting valve rod 64. A third channel 73 is arranged on the side wall of the coarse adjustment valve head 62, the third channel 73 can be communicated with a second channel 72, a fourth channel 74 is arranged at the head of the coarse adjustment valve head 62, the fourth channel 74 is coaxial and communicated with the first channel 71, the fourth channel 74 can be communicated with the third channel 73, internal threads are arranged on the inner wall of the coarse adjustment valve rod 64, a fine adjustment valve rod 65 is in threaded connection with the inner wall of the coarse adjustment valve rod 64, external threads are arranged on the outer wall of the fine adjustment valve rod 65, the head of the fine adjustment valve rod 65 can enter the fourth channel 74, and the tail of the fine adjustment valve rod 65 penetrates out of the tail of the coarse adjustment valve rod 64. When the water mixing valve works, the coarse adjusting valve rod 64 is rotated anticlockwise by a special wrench, the coarse adjusting valve rod 64 moves upwards along the axial direction of the rotating edge under the action of a screw thread, the coarse adjusting valve head 62 moves upwards along with the coarse adjusting valve rod 64, the first channel 71 on the water mixing valve seat 61 is opened along with the upward movement of the coarse adjusting valve rod 64 along the axial direction, hot water enters from the second channel 72, then flows out from the first channel 71, continues to rotate the rough adjusting valve rod 64, stops after roughly adjusting to the required water content, then clockwise rotating for 1-2 circles to adjust the water mixing amount to be slightly less than the required water mixing amount, anticlockwise rotating the fine adjustment valve rod 65 to drive the fine adjustment valve rod 65 to move upwards along the axial direction, at the moment, a fourth channel 74 and a third channel 73 on the rough adjustment valve head 62 are opened, after the micro-adjustment supplemented hot water passes through the second channel 72, the third channel 73 and the fourth channel 74 in sequence, and out of the first passage 71, continues to rotate the fine adjustment valve rod 65 counterclockwise until the desired amount of water is mixed.
In order to realize the rotation of the rough adjusting valve rod 64 and the fine adjusting valve rod 65, in the embodiment, a first rotating nut is fixed at the tail part of the rough adjusting valve rod 64, and a metal plate handle 67 is fixed at the tail part of the fine adjusting valve rod 65. The user can rotate the first rotating nut and the plate handle 67, so that the coarse adjustment valve rod 64 and the fine adjustment valve rod 65 can rotate, and the coarse adjustment valve rod 64 and the fine adjustment valve rod 65 can further move up and down.
To achieve relative securement of the coarse valve head 62 to the coarse valve stem 64, in this embodiment, the coarse valve head 62 is secured to the outside of the coarse valve stem 64 by a plurality of stop screws 63.
Regarding the specific structure of the main oil return valve 5, in this embodiment, the main oil return valve 5 includes an oil return valve seat 51, the oil return valve seat 51 is fixed at one end of the oil inlet pipe 1 close to the oil outlet pipe 4, a fifth channel 75 is provided on the oil return valve seat 51, and the fifth channel 75 is communicated with the oil inlet pipe 1. The side wall of the oil return valve seat 51 is provided with a sixth channel 76, a first flow direction cavity is arranged in the oil return valve seat 51, the sixth channel 76 and the fifth channel 75 are both communicated with the first flow direction cavity, and the sixth channel 76 is communicated with the oil outlet pipe 4. An oil return valve body 55 is fixed at one end of the oil return valve seat 51 far away from the oil inlet pipe 1, and a second flow direction cavity is arranged inside the oil return valve body 55. First class just to the cavity and the second class just to being linked together to the cavity, first class has single current valve head 52 to cavity sliding connection, fifth passageway 75 can be plugged up to the first end of single current valve head 52, the second end of single current valve head 52 is equipped with first flexible recess, the circumference equipartition has a plurality of seventh passageway 77 on the lateral wall of single current valve head 52, the second end of single current valve head 52 stretches into in the flexible recess of second on the lead screw 54, first flexible recess just is linked together with the flexible recess of second. The groove bottom of the first telescopic groove and the groove bottom of the second telescopic groove are respectively fixed at two ends of the spring 53, the outer wall of the lead screw 54 is provided with external threads, the inner wall of the second flow cavity is provided with internal threads, and the lead screw 54 is in threaded connection with the second flow cavity. In operation, a special wrench is used to rotate the second nut on the screw 54 clockwise, the screw 54 compresses the spring 53 axially under the action of the thread, and the initial pre-tightening force of the spring 53 can be adjusted by rotating the screw 54, so as to limit the hydraulic pressure required for opening the fifth channel 75. After reaching the preset compression stroke, the sum of the pre-tightening force of the spring 53 and the hydraulic pressure at the sixth channel 76 is smaller than the hydraulic pressure at the fifth channel 75, the check valve head 52 opens under the action of the pressure difference, the fluid flows in from the fifth channel 75 and flows out from the sixth channel 76, when the hydraulic pressure fluctuation at the fifth channel 75 becomes small, the sum of the pre-tightening force of the spring 53 and the hydraulic pressure at the sixth channel 76 is larger than the hydraulic pressure at the fifth channel 75, the check valve head 52 closes, the liquid at the sixth channel 76 is prevented from flowing backwards, and the function of the one-way flow of the total oil return valve 5 is realized. In addition, the main oil return valve 5 has a hard stop function, when the single flow valve head 52 is required to perform hard closing on the fifth channel 75, the single flow valve head 52 can be closed rigidly only by rotating the lead screw 54 until one end of the lead screw 54 abuts against the single flow valve head 52.
In order to facilitate the rotation of the screw 54, in the present embodiment, a second rotating nut is fixed to an end of the screw 54 away from the oil return valve seat 51, and the second rotating nut is located outside the oil return valve body 55. The user only needs to rotate the second rotating nut to drive the screw 54 to rotate, so as to apply a pre-tightening force to the spring 53.
In this embodiment, the water inlet pipe 3 is provided with a straight-through valve 11, a water-mixing check valve 7, a main water supply pipe and a hot washing valve 8. Specifically, the water mixing check valve 7 is arranged in front of the water mixing valve 6, and hot water in the water inlet pipe 3 passes through the water mixing check valve 7 and then passes through the water mixing valve 6. When hot water enters the water inlet pipe 3, the water inlet pipe 3 is controlled to be opened or closed by the water inlet valve 10. When the hot water is needed to wash the well, the hot water enters from the water inlet pipe 3, sequentially passes through the main water valve 10 and the hot washing valve 8, and then flows out from the air inlet pipe 2.
When the pressure of the casing gas is greater than the pressure value set by the constant pressure air release valve 9, the casing gas is released into the oil outlet flow according to the process pipeline of the constant pressure casing gas release flow, and is output along with the crude oil. In this embodiment, the air inlet pipe 2 is provided with a constant pressure air release valve 9. The natural gas flows from the gas inlet pipe 2 to the constant pressure air release valve 9, passes through the main oil return valve 5 and then flows out from the oil outlet pipe 4.
The constant pressure air release valve 9, the straight-through valve 11, the hot washing valve 8 and the main water inlet valve 10 are all arranged on the integrated box 13.
In order to realize the measurement of the pressure inside the tube, in the embodiment, as shown in fig. 8 to 10, the oil inlet tube 1 is provided with the bidirectional sealing pressure measuring plug 12, the bidirectional sealing pressure measuring plug 12 includes a pressure measuring body 121, a ninth passage 79 is provided in the pressure measuring body 121, and the ninth passage 79 penetrates through the pressure measuring body 121. The ninth passage 79 is internally threaded with a pilot valve stem 122, the right side of the ninth passage 79 is provided with internal threads, and the right side of the pilot valve stem 122 is provided with external threads. And a locking nut 124 and a single valve head 123 are sequentially installed on the left side of the pressure guide valve rod 122, and the locking nut 124 is in threaded connection with the pressure guide valve rod 122 and is used for compressing the one-way valve head. The second end of the impulse valve stem 122 is provided with a sensor mounting hole for mounting the pressure sensor 14. An eighth channel 78 is arranged in the pressure guide valve rod 122, the eighth channel 78 is communicated with the sensor mounting hole, a plurality of pressure measuring holes are arranged on the side wall of the pressure guide valve rod 122, and the pressure measuring holes are communicated with the eighth channel 78. A first shoulder 1211 and a second shoulder 1212 are arranged in the ninth channel 79, the first shoulder 1211 can abut against a protrusion of the single valve head 123, the second shoulder 1212 can abut against a protrusion of the pressure guide valve rod 122, and a drain hole is formed in the pressure measuring body 121. In normal operation, the second shoulder 1212 abuts against the protrusion of the impulse valve stem 122, and the fluid in the pipe flows from the eighth passage 78 to the pressure sensor 14 after passing through the gap between the unitary valve head 123 and the ninth passage 79, so as to measure the pressure value. When the pressure sensor 14 needs to be disassembled for maintenance, the position of the pressure guide valve rod 122 is adjusted, so that the one-way valve head abuts against the first shoulder 1211, the residual liquid in the ninth channel 79 flows out from the oil drainage hole, and at this time, the pressure sensor 14 is disassembled.
The embodiment also provides a water mixing method:
when hot water is required to be added into the oil inlet pipe 1, the hot water enters from the water inlet pipe 3, sequentially passes through the main water inlet valve 10, the water mixing check valve 7 and the water mixing valve 6, then is converged with the oil inlet pipe 1, and flows out from the oil outlet pipe 4 after passing through the main oil return valve 5. The hot water from the injection station is mixed into the output crude oil according to a certain amount, the temperature of the crude oil is improved, the pipeline blockage caused by the viscosity reduction and wax precipitation of the crude oil in the pipeline under the low-temperature external environment is prevented, and the water mixing valve 6, the water mixing check valve 7 and the main water valve 10 are arranged on the process and used for controlling the water mixing amount, the unidirectional flow and other functions.
When the crude oil needs to be directly discharged, the crude oil enters from the oil inlet pipe 1 and flows out from the oil outlet pipe 4 after passing through the main oil return valve 5; the crude oil produced by the pumping unit is conveyed according to a set process pipeline, and a main oil return valve 5 is arranged on the process pipeline and used for controlling the functions of one-way flow, stop and the like of the crude oil.
When the pressure of the sleeve gas is greater than the pressure value set by the constant-pressure air release valve 9, the sleeve gas is released into the oil outlet flow according to the process pipeline of the constant-pressure sleeve gas release flow, and is output along with the crude oil, wherein the specific flow is that natural gas flows to the constant-pressure air release valve 9 from the gas inlet pipe 2 and flows out from the oil outlet pipe 4 after passing through the main oil return valve 5;
in winter, under low temperature environment, the casing annulus and the oil pipe in the pit are easy to be waxed, so that the piston of the oil pump is blocked and can not work normally, the whole underground crude oil infiltration interface needs to be cleaned circularly by hot water from the ground, and a hot-washing valve and a process flow are arranged on the water-mixing flow combined wellhead device, so that the functional operation is realized, and the specific flow is as follows: hot water enters from the water inlet pipe 3, sequentially passes through the main water valve 10 and the hot washing valve 8, and then flows out from the air inlet pipe 2;
when the wellhead device and the Christmas tree connected with the water mixing flow combined wellhead device are maintained in a fault or the underground needs to be operated and maintained, the water mixing flow combined wellhead device and the ground process pipeline stop producing, the medium in the pipeline stops flowing, and in order to prevent the pipeline from being frozen and blocked due to freezing of water or serious separation of paraffin in the medium, hot water from an injection station is needed to be used for carrying out hot water mixing circulation on the whole water mixing flow combined wellhead device and the ground process pipeline, so that the straight-through flow on the water mixing flow combined wellhead device can meet the process requirements. The specific process is as follows: hot water enters from the water inlet pipe 3, passes through the water main valve 10 and the straight-through valve 11 in sequence, and then flows out from the oil outlet pipe 4.
The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present 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 view of the above, the present disclosure should not be construed as limiting the invention.
Claims (9)
1. The utility model provides a mix water flow combination wellhead assembly, is including advancing oil pipe, intake pipe, inlet tube and play oil pipe, advance oil pipe with the intake pipe respectively with the inlet tube is linked together, the entry linkage who advances oil pipe has crude oil pipeline, the exit linkage who advances oil pipe has an oil pipe, its characterized in that: a water mixing valve is arranged at the joint of the oil inlet pipe and the water inlet pipe, and a main oil return valve is arranged on the oil outlet pipe;
the pressure measuring device is characterized in that a bidirectional sealing pressure measuring plug is arranged on the oil inlet pipe and comprises a pressure measuring body, a ninth channel is arranged in the pressure measuring body and penetrates through the pressure measuring body, a pressure guide valve rod is connected with the pressure guide valve rod in an internal thread manner, a locking nut and a single valve head are sequentially installed at the first end of the pressure guide valve rod, a sensor installation hole is formed in the second end of the pressure guide valve rod and used for installing a pressure sensor, an eighth channel is arranged in the pressure guide valve rod and communicated with the sensor installation hole, a plurality of pressure measuring holes are formed in the side wall of the pressure guide valve rod and communicated with the eighth channel, a first shoulder and a second shoulder are arranged in the ninth channel, the first shoulder can abut against the bulges of the single valve head, and the second shoulder can abut against the bulges of the pressure guide valve rod, and an oil drainage hole is formed in the pressure measuring body.
2. The watering process combination wellhead assembly of claim 1, wherein: the watering valve comprises a watering valve seat, the watering valve seat is fixed on the pipe wall of the oil inlet pipe, the watering valve seat is provided with a first channel, the first channel of the watering valve seat is communicated with the oil inlet pipe, one end of the watering valve seat is fixedly connected with a watering valve body, a second channel is arranged on the side wall of the watering valve body, the second channel is communicated with the water inlet pipe, the first channel and the second channel can be communicated, the inner wall of the watering valve body is provided with internal threads, the inner wall of the watering valve body is in threaded connection with a rough adjusting valve rod, the outer wall of the rough adjusting valve rod is provided with external threads, the head of the rough adjusting valve rod is fixed with a rough adjusting valve head, the tail of the rough adjusting valve rod penetrates out of the watering valve body, the side wall of the rough adjusting valve head is provided with a third channel, and the third channel can be communicated with the second channel, the head of the coarse adjustment valve head is provided with a fourth channel, the fourth channel is communicated with the first channel, the fourth channel can be communicated with the third channel, the inner wall of the coarse adjustment valve rod is provided with an internal thread, the inner wall of the coarse adjustment valve rod is in threaded connection with a fine adjustment valve rod, the outer wall of the fine adjustment valve rod is provided with an external thread, the head of the fine adjustment valve rod can enter the fourth channel, and the tail of the fine adjustment valve rod penetrates out of the tail of the coarse adjustment valve rod.
3. The watering process combination wellhead assembly of claim 2, wherein: the tail part of the coarse adjustment valve rod is fixed with a first rotating nut, and the tail part of the fine adjustment valve rod is fixed with a metal plate handle.
4. The watering process combination wellhead assembly of claim 2, wherein: the rough adjusting valve head is fixed on the outer side of the rough adjusting valve rod through a limiting screw.
5. The watering process combination wellhead assembly of claim 1, wherein: the total oil return valve comprises an oil return valve seat, the oil return valve seat is fixed at one end, close to the oil inlet pipe, of the oil outlet pipe, a fifth channel is arranged on the oil return valve seat, the fifth channel is communicated with the oil inlet pipe, a sixth channel is arranged on the side wall of the oil return valve seat, a first flow direction cavity is arranged in the oil return valve seat, the sixth channel and the fifth channel are communicated with the first flow direction cavity, the sixth channel is communicated with the oil outlet pipe, an oil return valve body is fixed at one end, far away from the oil inlet pipe, of the oil return valve seat, a second flow direction cavity is arranged inside the oil return valve body, the first flow direction cavity is communicated with the second flow direction cavity, a single flow valve head is connected in the first flow direction cavity in a sliding mode, the first end of the single flow valve head can plug the fifth channel, and a first telescopic groove is arranged at the second end of the single flow valve head, the second end of single current valve head stretches into in the flexible recess of second on the lead screw, first flexible recess with the flexible recess of second is linked together, the tank bottom of first flexible recess with the tank bottom of the flexible recess of second is fixed in the both ends of spring respectively, the outer wall of lead screw has the external screw thread, the second is flowed to and is equipped with the internal thread on the inner wall of cavity, lead screw threaded connection in the second flows to the cavity.
6. The watering process combination wellhead assembly of claim 5, wherein: and a second rotating nut is fixed at one end of the screw rod, which is far away from the oil return valve seat, and the second rotating nut is positioned at the outer side of the oil return valve body.
7. The watering process combination wellhead assembly of claim 1, wherein: and the water inlet pipe is provided with a water mixing check valve, a main water inlet pipe and a hot washing valve.
8. The watering process combination wellhead assembly of claim 1, wherein: and a constant-pressure air release valve is arranged on the air inlet pipe.
9. A watering method based on the watering process combined wellhead assembly according to any one of claims 1 to 8, characterized in that:
when hot water is required to be added into the oil inlet pipe, the hot water enters from the water inlet pipe, sequentially passes through the main water inlet valve, the water mixing check valve and the water mixing valve, then is converged with the oil inlet pipe, and flows out of the oil outlet pipe after passing through the main oil return valve;
when the crude oil needs to be directly discharged, the crude oil enters from the oil inlet pipe and flows out from the oil outlet pipe after passing through the main oil return valve;
when the pressure of the sleeve gas is greater than the pressure value set by the constant-pressure deflation valve, the natural gas flows to the constant-pressure deflation valve from the gas inlet pipe and flows out of the oil outlet pipe after passing through the main oil return valve;
when the well needs to be washed by hot water, the hot water enters from the water inlet pipe, sequentially passes through the main water inlet valve and the hot washing valve and then flows out from the air inlet pipe;
when hot water is needed to directly carry out hot washing on the oil outlet pipe, the hot water enters from the water inlet pipe, sequentially passes through the main water inlet valve and the straight-through valve and then flows out of the oil outlet pipe.
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| CN202110684044.0A CN113202447B (en) | 2021-06-21 | 2021-06-21 | Water-mixing flow combined wellhead device |
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| CN202110684044.0A CN113202447B (en) | 2021-06-21 | 2021-06-21 | Water-mixing flow combined wellhead device |
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| CN113202447B true CN113202447B (en) | 2021-12-28 |
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| CN115637968B (en) * | 2022-09-29 | 2023-08-11 | 南通华兴石油仪器有限公司 | Water mixing flow combined wellhead device |
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| CN113202447A (en) | 2021-08-03 |
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Effective date of registration: 20211209 Address after: 163316 room 711, building D-1, Service Outsourcing Industrial Park, No. 8, Xinfeng Road, high tech Zone, Daqing City, Heilongjiang Province Applicant after: Daqing Yiyuan Petroleum Science and Technology Development Co.,Ltd. Address before: 151600 chengjiatun, group 37, Fourth Committee, Lixin street, Qinggang Town, Suihua City, Heilongjiang Province Applicant before: Mu Hongsheng |
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