CN212296352U - Sleeve pipe pressure measuring device - Google Patents
Sleeve pipe pressure measuring device Download PDFInfo
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- CN212296352U CN212296352U CN202021032097.1U CN202021032097U CN212296352U CN 212296352 U CN212296352 U CN 212296352U CN 202021032097 U CN202021032097 U CN 202021032097U CN 212296352 U CN212296352 U CN 212296352U
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Abstract
The utility model discloses a casing pressure measuring device, relate to the oil field and produce oil well head technical field, the pressure taking pipe fittings includes the check valve, the high-pressure pipe and the pressure taking capsule, connect joint inner chamber one end and can dismantle with the pressure sensor seal, connect joint inner chamber other end and check valve one end sealing connection, the check valve other end and high-pressure pipe one end sealing connection, the high-pressure pipe other end stretches into the casing and links to each other with the pressure taking capsule seal, the pressure taking capsule is located below the frozen soil layer, the high-pressure pipe and the pressure taking capsule are filled with antifreeze, when the pressure sensor links to each other with the connection joint seal, the check valve is in the open state, antifreeze can flow out from the check valve; when the pressure sensor is detached from the connecting joint, the one-way valve is in a closed state, the antifreeze cannot flow out of the one-way valve, and the pressure sensor is electrically connected with the pressure data processing unit. The influence of liquid freezing is avoided, the sleeve pressure measurement is accurate, liquid leakage cannot be caused during maintenance, and the device is safe, environment-friendly and pollution-free.
Description
Technical Field
The utility model relates to an oil field oil recovery wellhead assembly technical field especially relates to a sleeve pipe pressure measurement device.
Background
Casing pressure is one of the main technical indexes of well control, and the accuracy and reliability of casing pressure measurement directly influence the safety, oil production cost, oil production quantity and the like of an oil well.
The existing casing pressure measuring devices are all installed on a large ground four-way joint, and especially pressure taking points for measuring the casing pressure are all located above the ground, namely the pressure taking points are arranged on the large four-way joint, so that the method has the following problems: (1) for oil fields in alpine regions, a well mouth is easy to freeze in winter, and liquid at a pressure point is frozen; (2) a large amount of oil stains floating on the upper part easily block the pressure taking port. The casing pressure can not be measured accurately due to the problems, and meanwhile, the casing pressure measuring device arranged on the large four-way valve needs to be emptied and sleeved when in maintenance, so that liquid leakage is easily caused, and the environment is polluted.
How to avoid the influence because of liquid freezes, floater blocks up and causes for can accurate measurement sleeve pipe pressure, how to guarantee that safety ring protects pollution-free when overhauing simultaneously, just become the problem that must solve.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a casing pressure measurement device to solve the problem that above-mentioned prior art exists, avoided well head liquid to freeze in winter and the floater blocks up the influence that causes the pressure measurement, casing pressure measurement is accurate, and can not cause liquid leakage when overhauing, and safety ring protects pollution-free.
In order to achieve the above object, the utility model provides a following scheme:
the utility model provides a casing pressure measuring device, which comprises a pressure taking pipe fitting, a pressure data processing unit, a pressure sensor and a connecting joint,
the pressure taking pipe fitting comprises a one-way valve, a high-pressure pipe and a pressure taking capsule, one end of an inner cavity of the connecting joint is hermetically and detachably connected with the pressure sensor, the other end of the inner cavity of the connecting joint is hermetically connected with one end of the one-way valve, the connecting joint is used for being hermetically and fixedly connected with a side flange of the large four-way joint of the wellhead, the pressure sensor is positioned outside the large four-way joint of the wellhead, and the one-way valve is positioned inside the large four-way joint of the wellhead;
the other end of the one-way valve is fixedly connected with one end of the high-pressure pipe in a sealing mode, the other end of the high-pressure pipe penetrates through an annular space formed by the oil pipe and the sleeve and extends into the sleeve and is connected with the pressure taking capsule in a sealing mode, the pressure taking capsule is located below a frozen soil layer, the high-pressure pipe and the pressure taking capsule are filled with anti-freezing solution, when the pressure sensor is fixedly connected with the connecting joint in a sealing mode, the one-way valve is in an open state, and the anti-freezing solution can flow into the pressure sensor from the one-way valve; when the pressure sensor is detached from the connecting joint, the one-way valve is in a closed state, and the antifreeze cannot flow out of the one-way valve;
the pressure sensor is electrically connected with the pressure data processing unit.
Preferably, the check valve comprises a valve body, a valve core, a spring and an ejector rod, the valve core and the spring are both arranged in an inner cavity of the valve body, the spring is positioned on one side of the valve core, the ejector rod is slidably arranged in an inner cavity at one end of the valve body, the ejector rod is positioned on the other side of the valve core, one end of the valve body, which is provided with the ejector rod, is hermetically connected with the inner cavity of the connecting joint, one end of the valve body, which is far away from the ejector rod, is hermetically and fixedly connected with the high-pressure pipe, when the pressure sensor is hermetically and fixedly connected with the connecting joint, the pressure sensor pushes the ejector rod, and the ejector rod pushes the; when the pressure sensor is detached from the connecting joint, the spring pushes the valve core to a closed state.
Preferably, the ejector rod is axially provided with a through hole, a side hole is formed in the side wall of one end, close to the valve core, of the ejector rod, the side hole is communicated with the through hole, and when the ejector rod pushes the valve core to be in an open state, anti-freezing liquid flows through the side hole and the through hole and then enters the pressure sensor.
Preferably, the inner cavity of the connecting joint comprises a first cavity, a second cavity and a third cavity, the first cavity and the third cavity are respectively located at two ends of the inner cavity of the connecting joint, the second cavity is communicated with the first cavity and the third cavity, the pressure sensor is in threaded connection with the inner wall of the first cavity, one end of the valve body, which is provided with the ejector rod, is in threaded connection with the inner wall of the third cavity, and the ejector rod penetrates through the third cavity to be in close contact with the pressure sensor.
The utility model discloses for prior art gain following technological effect:
the utility model provides a sleeve pipe pressure measurement device, get the pressure pipe fitting through the setting and make and get and press the capsule and be located under the frozen soil layer, utilize antifreeze to transmit sleeve pipe pressure to pressure sensor, avoided well head liquid to freeze in winter and the floater blocks up the influence that causes the pressure measurement, sleeve pipe pressure measurement is accurate reliable, arrange pressure sensor in the connector outside, and keep apart antifreeze with the check valve, when needs overhaul the calibration to pressure sensor, dismantle the back with pressure sensor, the check valve is closed, can not cause the liquid leakage, safety ring protects pollution-free.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used 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 for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a casing pressure measuring device provided by the present invention;
FIG. 2 is a schematic diagram of a pressure tapping fitting in the casing pressure measuring device of FIG. 1;
FIG. 3 is an enlarged view of a portion of the casing pressure measuring device of FIG. 1;
FIG. 4 is a schematic cross-sectional view of a connection fitting in the casing pressure measuring device of FIG. 1;
in the figure: 1-pressure taking pipe fitting, 2-pressure data processing unit, 3-pressure sensor, 4-connecting joint, 401-first cavity, 402-second cavity, 403-third cavity, 5-one-way valve, 501-valve body, 502-valve core, 503-spring, 504-ejector rod, 5041-through hole, 5042-side hole, 6-high pressure pipe, 7-pressure taking capsule, 8-wellhead big four-way, 9-oil pipe, 10-casing pipe, 11-frozen soil layer and 12-sealing ring.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model aims at providing a casing pressure measurement device to solve the problem that prior art exists, avoided well head liquid to freeze in winter and the floater blocks up the influence that causes the pressure measurement, casing pressure measurement is accurate, and can not cause the liquid leakage when overhauing, and safety ring protects pollution-free.
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
As shown in fig. 1 to 4, the present embodiment provides a casing pressure measuring device, which includes a pressure measuring pipe 1, a pressure data processing unit 2, a pressure sensor 3 and a connection joint 4,
the pressure taking pipe fitting 1 comprises a one-way valve 5, a high-pressure pipe 6 and a pressure taking capsule 7, one end of an inner cavity of a connecting joint 4 is in sealing detachable connection with the pressure sensor 3, the other end of the inner cavity of the connecting joint 4 is in sealing connection with one end of the one-way valve 5, the connecting joint 4 is used for being in sealing fixed connection with a flange on the side surface of the large four-way 8 of the wellhead and enabling the pressure sensor 3 to be located outside the large four-way 8 of the wellhead, and the one-way valve 5 is located inside;
the other end of the one-way valve 5 is fixedly connected with one end of a high-pressure pipe 6 in a sealing manner, the other end of the high-pressure pipe 6 penetrates through an annular space formed by an oil pipe 9 and a sleeve 10 and extends into the sleeve 10 and is connected with a pressure taking capsule 7 in a sealing manner, the pressure taking capsule 7 is positioned below a frozen soil layer 11, the high-pressure pipe 6 and the pressure taking capsule 7 are filled with antifreeze, when the pressure sensor 3 is fixedly connected with the connecting joint 4 in a sealing manner, the one-way valve 5 is in an open state, and the antifreeze can flow into the pressure sensor 3 from the one-way valve 5; when the pressure sensor 3 is detached from the connecting joint 4, the one-way valve 5 is in a closed state, and the antifreeze cannot flow out of the one-way valve 5;
the pressure sensor 3 is electrically connected to the pressure data processing unit 2.
When pressure measurement is carried out, the pressure sensor 3 is fixedly connected to the connecting joint 4, at the moment, the one-way valve 5 is in an open state, liquid in the casing 10 extrudes the pressure taking capsule 7 to enable the pressure taking capsule 7 to deform, the pressure taking capsule 7 is made of an elastically deformable material such as rubber, antifreeze in the pressure taking capsule 7 and the high-pressure pipe 6 flows out from the one-way valve 5 to the pressure sensor 3, the antifreeze is used for transmitting the pressure in the casing 10 to the pressure sensor 3, the pressure sensor 3 uploads a measured pressure signal to the pressure data processing unit 2, the pressure data processing unit 2 processes the signal to obtain pressure data in the casing 10, as the pressure taking capsule 7 is positioned below a frozen soil layer 11, the liquid in the casing 10 around the pressure taking capsule 7 is ensured not to be frozen all the time, and meanwhile, as the pressure taking capsule 7 is far away from floating objects such as oil stains (the floating objects are, the influence of freezing of liquid at the well head in winter and blockage of floaters on pressure measurement is avoided, and the sleeve pressure measurement is accurate and reliable; the pressure sensor 3 is arranged on the outer side of the connecting joint, the one-way valve 5 is used for isolating the anti-freezing solution, when the pressure sensor 3 needs to be maintained and calibrated, the one-way valve 5 is closed after the pressure sensor 3 is disassembled, liquid leakage cannot be caused, safety, environmental protection and no pollution are realized, the anti-freezing solution can be L-HS (anti-wear in cold regions) low-temperature hydraulic oil and is used within the temperature range of-40-130 ℃, and the anti-freezing solution is ensured to be not solidified absolutely at low temperature.
As shown in fig. 2 to 3, in this embodiment, the check valve 5 includes a valve body 501, a valve core 502, a spring 503 and a plunger 504, the valve core 502 and the spring 503 are both disposed in an inner cavity of the valve body 501, the spring 503 is disposed on one side of the valve core 502, the plunger 504 is slidably disposed in the inner cavity of one end of the valve body 501, the plunger 504 is disposed on the other side of the valve core 502, one end of the valve body 501, which is provided with the plunger 504, is hermetically connected to the inner cavity of the connector 4, one end of the valve body 501, which is far away from the plunger 504, is hermetically and fixedly connected to the high-pressure pipe 6, when the pressure sensor 3 is hermetically and fixedly connected to the connector 4, the pressure sensor 3 pushes the plunger 504, the plunger 504 pushes the valve core 502 to an open state, antifreeze fluid flows into the inner cavity of the connector; when the pressure sensor 3 is detached from the connecting joint 4, the spring 503 pushes the valve core 502 to a closed state, and the antifreeze cannot flow out of the check valve 5, so that the leakage of the antifreeze when the pressure sensor 3 is detached for maintenance calibration is avoided, wherein a sealing ring 12 is arranged at the joint of the valve body 501 and the connecting joint 4, and the sealing effect is better.
As shown in fig. 2 to 3, in the present embodiment, a through hole 5041 is axially formed in the ejector rod 504, a side wall of one end of the ejector rod 504, which is close to the valve core 502, is provided with a side hole 5042, the side hole 5042 is communicated with the through hole 5041, when the ejector rod 504 pushes the valve core 502 to an open state, antifreeze fluid flows through the side hole 5042 and the through hole 5041 and enters the pressure sensor 3, and then pressure is measured by the pressure sensor 3, which is simple in structure and convenient in measurement.
As shown in fig. 3 to 4, in this embodiment, the inner cavity of the connection joint 4 includes a first cavity 401, a second cavity 402, and a third cavity 403, the first cavity 401 and the third cavity 403 are respectively located at two ends of the inner cavity of the connection joint 4, the second cavity 402 communicates the first cavity 401 and the third cavity 403, the pressure sensor 3 is in threaded connection with the inner wall of the first cavity 401, one end of the valve body 501 where the push rod 504 is located is in threaded connection with the inner wall of the third cavity 403, the push rod 504 passes through the third cavity 403 to be in close contact with the pressure sensor 3, and the threaded connection is adopted, so that the valve body is convenient to disassemble and assemble, and the connection is fastened, wherein the outer diameter of the push rod 504 is smaller than the diameter of the inner wall of the third cavity 403, when the pressure sensor 3 is installed, the pressure sensor 3 pushes the push rod 504, so that the push rod 504 can slide more in.
The utility model discloses a concrete example is applied to explain the principle and the implementation mode of the utility model, and the explanation of the above example is only used to help understand the method and the core idea of the utility model; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.
Claims (4)
1. A casing pressure measurement device, characterized in that: comprises a pressure-taking pipe fitting, a pressure data processing unit, a pressure sensor and a connecting joint,
the pressure taking pipe fitting comprises a one-way valve, a high-pressure pipe and a pressure taking capsule, one end of an inner cavity of the connecting joint is hermetically and detachably connected with the pressure sensor, the other end of the inner cavity of the connecting joint is hermetically connected with one end of the one-way valve, the connecting joint is used for being hermetically and fixedly connected with a side flange of the large four-way joint of the wellhead, the pressure sensor is positioned outside the large four-way joint of the wellhead, and the one-way valve is positioned inside the large four-way joint of the wellhead;
the other end of the one-way valve is fixedly connected with one end of the high-pressure pipe in a sealing mode, the other end of the high-pressure pipe penetrates through an annular space formed by the oil pipe and the sleeve and extends into the sleeve and is connected with the pressure taking capsule in a sealing mode, the pressure taking capsule is located below a frozen soil layer, the high-pressure pipe and the pressure taking capsule are filled with anti-freezing solution, when the pressure sensor is fixedly connected with the connecting joint in a sealing mode, the one-way valve is in an open state, and the anti-freezing solution can flow into the pressure sensor from the one-way valve; when the pressure sensor is detached from the connecting joint, the one-way valve is in a closed state, and the antifreeze cannot flow out of the one-way valve;
the pressure sensor is electrically connected with the pressure data processing unit.
2. The casing pressure measurement device of claim 1, wherein: the check valve comprises a valve body, a valve core, a spring and an ejector rod, wherein the valve core and the spring are arranged in an inner cavity of the valve body, the spring is positioned on one side of the valve core, the ejector rod is arranged in an inner cavity of one end of the valve body in a sliding mode and is positioned on the other side of the valve core, one end, provided with the ejector rod, of the valve body is connected with an inner cavity of the connecting joint in a sealing mode, one end, far away from the ejector rod, of the valve body is fixedly connected with the high-pressure pipe in a sealing mode, when the pressure sensor is fixedly connected with the connecting joint in a sealing mode, the pressure sensor pushes the ejector rod, the ejector rod pushes the valve core to an opening state, and when the pressure sensor is detached from the connecting joint.
3. The casing pressure measurement device of claim 2, wherein: the anti-freezing valve is characterized in that a through hole is axially formed in the ejector rod, a side hole is formed in the side wall of one end, close to the valve element, of the ejector rod, the side hole is communicated with the through hole, and when the ejector rod pushes the valve element to be in an open state, anti-freezing liquid flows through the side hole and the through hole and then enters the pressure sensor.
4. The casing pressure measurement device of claim 2, wherein: the inner cavity of the connecting joint comprises a first cavity, a second cavity and a third cavity, the first cavity and the third cavity are respectively located at two ends of the inner cavity of the connecting joint, the second cavity is communicated with the first cavity and the third cavity, the pressure sensor is in threaded connection with the inner wall of the first cavity, one end of the valve body provided with the ejector rod is in threaded connection with the inner wall of the third cavity, and the ejector rod penetrates through the third cavity and is in close contact with the pressure sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021032097.1U CN212296352U (en) | 2020-06-08 | 2020-06-08 | Sleeve pipe pressure measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021032097.1U CN212296352U (en) | 2020-06-08 | 2020-06-08 | Sleeve pipe pressure measuring device |
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| Publication Number | Publication Date |
|---|---|
| CN212296352U true CN212296352U (en) | 2021-01-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021032097.1U Active CN212296352U (en) | 2020-06-08 | 2020-06-08 | Sleeve pipe pressure measuring device |
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|---|---|
| CN (1) | CN212296352U (en) |
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2020
- 2020-06-08 CN CN202021032097.1U patent/CN212296352U/en active Active
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