CN111535801A - Sleeve pipe pressure measuring device - Google Patents
Sleeve pipe pressure measuring device Download PDFInfo
- Publication number
- CN111535801A CN111535801A CN202010513002.6A CN202010513002A CN111535801A CN 111535801 A CN111535801 A CN 111535801A CN 202010513002 A CN202010513002 A CN 202010513002A CN 111535801 A CN111535801 A CN 111535801A
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- Prior art keywords
- pressure
- pressure sensor
- cavity
- connecting joint
- valve
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- 239000002775 capsule Substances 0.000 claims abstract description 25
- 239000007788 liquid Substances 0.000 claims abstract description 16
- 238000009530 blood pressure measurement Methods 0.000 claims abstract description 15
- 238000007710 freezing Methods 0.000 claims abstract description 15
- 230000002528 anti-freeze Effects 0.000 claims abstract description 14
- 239000002689 soil Substances 0.000 claims abstract description 7
- 238000007789 sealing Methods 0.000 claims description 18
- 230000008014 freezing Effects 0.000 abstract description 5
- 238000012423 maintenance Methods 0.000 abstract description 5
- 238000000605 extraction Methods 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 10
- 208000034699 Vitreous floaters Diseases 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
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- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Geophysics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention discloses a casing pressure measuring device, which relates to the technical field of oil extraction well heads in oil fields, wherein a 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 a connecting joint is hermetically and detachably connected with a 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 other end of the one-way valve is hermetically connected with one end of the high-pressure pipe, the other end of the high-pressure pipe extends into the casing and is hermetically connected with the pressure taking capsule, the pressure taking capsule is positioned below a frozen soil layer, the high-pressure pipe and the pressure taking capsule are filled with antifreeze, when the pressure sensor is hermetically connected with the connecting joint; 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 invention relates to the technical field of oil extraction well mouth devices in oil fields, in particular to a casing pressure measuring 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.
Disclosure of Invention
The invention aims to provide a casing pressure measuring device, which solves the problems in the prior art, avoids the influence of freezing of wellhead liquid in winter and blockage of floating objects on pressure measurement, is accurate in casing pressure measurement, does not cause liquid leakage during maintenance, is safe, environment-friendly and pollution-free.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides a casing pressure measuring device, which comprises a pressure measuring 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.
Compared with the prior art, the invention has the following technical effects:
the invention provides a casing pressure measuring device, which is characterized in that a pressure measuring pipe is arranged, a pressure measuring capsule is positioned below a frozen soil layer, and casing pressure is transmitted to a pressure sensor by using antifreeze, so that the influence of freezing of wellhead liquid in winter and floater blockage on pressure measurement is avoided.
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 casing pressure measurement 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 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 casing pressure measuring device, which solves the problems in the prior art, avoids the influence of freezing of wellhead liquid in winter and blockage of floating objects on pressure measurement, is accurate in casing pressure measurement, does not cause liquid leakage during maintenance, is safe, environment-friendly and pollution-free.
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 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 principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the 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 |
|---|---|---|---|
| CN202010513002.6A CN111535801A (en) | 2020-06-08 | 2020-06-08 | Sleeve pipe pressure measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010513002.6A CN111535801A (en) | 2020-06-08 | 2020-06-08 | Sleeve pipe pressure measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111535801A true CN111535801A (en) | 2020-08-14 |
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ID=71974357
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010513002.6A Pending CN111535801A (en) | 2020-06-08 | 2020-06-08 | Sleeve pipe pressure measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111535801A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023081592A1 (en) * | 2021-11-02 | 2023-05-11 | Baker Hughes Oilfield Operations Llc | Convertible gauge module and system |
-
2020
- 2020-06-08 CN CN202010513002.6A patent/CN111535801A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023081592A1 (en) * | 2021-11-02 | 2023-05-11 | Baker Hughes Oilfield Operations Llc | Convertible gauge module and system |
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