CN217156113U - Hydrostatic pressure testing device for oil well pipe - Google Patents
Hydrostatic pressure testing device for oil well pipe Download PDFInfo
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- CN217156113U CN217156113U CN202220593823.XU CN202220593823U CN217156113U CN 217156113 U CN217156113 U CN 217156113U CN 202220593823 U CN202220593823 U CN 202220593823U CN 217156113 U CN217156113 U CN 217156113U
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Abstract
A hydrostatic pressure testing device for an oil well pipe comprises an oil well pipe section of a sample to be tested, wherein a water injection testing end cover is arranged at the male end of the oil well pipe section, a pressure maintaining exhaust end cover is arranged at the female end of the oil well pipe section, and the water injection testing end cover and the pressure maintaining exhaust end cover are in threaded connection with the oil well pipe section by utilizing original threads of the oil well pipe; the water inlet pipe is connected with the water tank, and a rotary pump, a check valve, a first gate valve, a first electromagnetic valve, a pressure pump, an external pressure-taking self-regulating valve, a second gate valve and a three-way valve are sequentially arranged on the water inlet pipe along the flow direction of the water inlet pipe; and a second electromagnetic valve is arranged on the water inlet branch pipe, the first pressure gauge is connected with the three-way valve, and the second pressure gauge is connected with an external pressure-taking self-regulating valve. The utility model discloses an oil well pipe hydrostatic pressure testing arrangement is through utilizing the original screw thread of oil well pipe, after installing water injection testing arrangement, pressurize exhaust apparatus additional, utilizes portable pressurization testing arrangement, realizes under the open-air environment, the hydrostatic pressure test of oil well pipe product detects.
Description
Technical Field
The utility model belongs to the technical field of the hydrostatic pressure test of oil well pipe, concretely relates to hydrostatic pressure testing arrangement of oil well pipe.
Background
According to the statistical analysis of the failure of the API oil well pipe, 86% of the failures of the oil well pipe occur at the connecting part. The main failure mode is structural failure generated by composite stress of tension, compression and bending during service.
The common oil well pipe is hot rolled or heat treated, and then processed with external thread, and screwed with the internal thread of the coupling to form a pipe string buried in the stratum for oil and gas exploitation. The joint connection strength mainly depends on the properties of the materials and the thread structure.
The connection method only depends on the self-performance of the material to ensure the use performance of the joint, and joint connection failure is easy to occur when composite stress acts on the joint part. Hydrostatic pressure test is essential to the oil well pipe, and the oil well pipe has hydrostatic pressure test's demand in warehouse commodity inspection, the on-the-spot use process.
The hydrostatic pressure test of the traditional oil well pipe can be generally carried out only in a processing workshop by special hydraulic pressure test equipment, the equipment system is large in size and complex to operate, corresponding detection support cannot be timely provided in the stages of commodity inspection and field technical service, and no special equipment is used for carrying out the hydrostatic pressure test in the field use period of the existing oil well pipe.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems, the utility model discloses the main objective is to solve during the field usage of oil well pipe, does not have special equipment to carry out the problem of hydrostatic pressure test. Therefore, the utility model provides a hydrostatic pressure testing arrangement is realized by following technical scheme:
a hydrostatic pressure testing device for an oil well pipe comprises an oil well pipe section of a sample to be tested, wherein the oil well pipe section comprises a water inlet pipe, a water inlet branch pipe and a gas outlet pipe, a water injection testing end cover is installed at the male end of the oil well pipe section, a pressure maintaining exhaust end cover is installed at the female end of the oil well pipe section, and the water injection testing end cover and the pressure maintaining exhaust end cover are in threaded connection with the oil well pipe section by utilizing original threads of the oil well pipe;
the water injection testing end cover is connected with the outlet end of the water inlet pipe and the inlet end of the air outlet pipe, the inlet end of the water inlet pipe is connected with the water tank, and a rotary pump, a check valve, a first gate valve, a first electromagnetic valve, a pressure pump, an external pressure-taking self-force adjusting valve, a second gate valve and a three-way valve are sequentially arranged on the water inlet pipe along the flow direction of the water inlet pipe;
the inlet end of the water inlet branch pipe is connected with a pipeline at the outlet end of the first gate valve, and the outlet end of the water inlet branch pipe is connected with a pipeline at the outlet end of the external pressure-taking self-force adjusting valve;
the pressure measuring device comprises a first pressure gauge and a second pressure gauge, wherein the first pressure gauge is connected with a three-way valve, and the second pressure gauge is connected with an external pressure-taking self-regulating valve;
and the air outlet pipe is sequentially provided with an exhaust valve and a third electromagnetic valve along the circulation direction of the pipeline.
Furthermore, a first sealing ring is arranged between the water injection testing end cover and the male end of the oil well pipe section, and a second sealing ring is arranged between the pressure maintaining exhaust end cover and the female end of the oil well pipe section.
Further, a safety valve is arranged on the pressure maintaining exhaust end cover.
Further, the first seal ring is sized to match the size of the male end of the well pipe section and the second seal ring is sized to match the size of the female end of the well pipe section.
Further, the first sealing ring and the second sealing ring are both non-metal rings.
Further, the first sealing ring and the second sealing ring are arranged to be rubber rings or silica gel rings.
The utility model discloses an oil well pipe hydrostatic pressure testing arrangement is through utilizing the original screw thread of oil well pipe, after installing water injection testing arrangement, pressurize exhaust apparatus additional, utilizes portable pressurization testing arrangement, realizes under the open-air environment, the hydrostatic pressure test of oil well pipe product detects.
The utility model discloses an oil well pipe hydrostatic pressure testing arrangement can carry out portable pressurization test to the product that awaits measuring, can realize using a small amount of water sources, and to API screw thread oil well pipe or special screw thread oil well pipe product, carry out the purpose that is greater than or equal to 69 MPa's hydrostatic pressure test in the field environment.
The utility model discloses an oil well pipe hydrostatic pressure testing arrangement has solved traditional oil well pipe and can not carry out the problem of storehouse environment, open-air environment hydrostatic pressure test.
Drawings
Fig. 1 is the utility model discloses a water injection test end cover, pressurize exhaust end cover set up the sketch map, wherein water injection test end cover, the pipe connection of pressurize exhaust end cover is not shown in the figure.
Fig. 2 is a schematic view of the overall structure of the device of the present invention.
The reference numbers in the figures illustrate:
1. a water tank; 2. a rotary pump; 3. a check valve; 4. a first gate valve; 5. a first solenoid valve; 6. a second solenoid valve; 7. a pressure pump; 8. an external pressure-taking self-regulating valve; 9. a second gate valve; 10. a three-way valve; 11. an oil well pipe section; 12. water injection test end covers; 13. a pressure maintaining exhaust end cover; 14. a first seal ring; 15. a second seal ring; 16. a water inlet pipe; 161. a water inlet branch pipe; 17. an air outlet pipe; 18. a third electromagnetic valve; 19. A safety valve; 20. a first pressure gauge; 21. a second pressure gauge; 22. and (4) exhausting the valve.
Detailed Description
The technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiment of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention based on the embodiments of the present invention.
Please refer to fig. 1, which shows the overall structure diagram of the hydrostatic testing device for oil well pipe according to the present invention, the device includes a water tank 1, a rotary pump 2, a check valve 3, a first gate valve 4, a first solenoid valve 5, a second solenoid valve 6, a pressure pump 7, an external pressure-tapping self-regulating valve 8, a second gate valve 9, a three-way valve 10, and an oil well pipe section 11 as a sample to be tested.
Generally, both ends of the oil well pipe section 11 are provided with threads which are original to the oil well pipe section 11, the device does not need to be additionally arranged in comparison, one end of the device is a male end with external threads, the other end of the device is a female end with internal threads, the water injection testing end cover 12 is provided with threads matched with the male end of the oil well pipe section 11, and the pressure maintaining exhaust end cover 13 is provided with threads matched with the female end of the oil well pipe section 11. Referring to fig. 2, a water injection test end cap 12 is installed at the male end of an oil well pipe section 11 through threads, a pressure maintaining exhaust end cap 13 is installed at the female end through threads, a first sealing ring 14 is arranged between the water injection test end cap 12 and the left end of the well pipe section 11, a second sealing ring 15 is arranged between the pressure maintaining exhaust end cover 13 and the right end part of the oil well pipe section 11, generally, the first sealing ring 14 and the second sealing ring 15 are all non-metal rings made of waterproof materials and have certain flexibility, after the water injection test end cover 12 and the pressure maintaining exhaust end cover 13 are arranged on the oil well pipe section 11, the water injection test end cover and the pressure maintaining exhaust end cover can be in close contact with the oil well pipe section 11, the sealing performance of the oil well pipe section is ensured, in this embodiment, the first sealing ring 14 and the second sealing ring 15 are provided as rubber rings or silicone rings, the size of the first sealing ring 14 matches the size of the end of the left end of the well pipe section 11, and the size of the second sealing ring 15 matches the size of the end of the right end of the well pipe section 11.
And a pressure maintaining exhaust end cover 13 at the male end of the oil well pipe section 11 is connected with one end of a water inlet pipe 16 and one end of an air outlet pipe 17. The end connection water tank 1 of intaking of inlet tube 16, water tank 1 connects gradually rotary pump 2 through inlet tube 16, check valve 3, and first gate valve 4, first solenoid valve 5, force (forcing) pump 7, the outside pressure self-operated valve 8, second gate valve 9, three-way valve 10 of getting are drawn to the water tank, and the device still includes intake branch 161, is provided with second solenoid valve 6 on this intake branch 161, intake branch 161's one end is intake and is held the pipeline of connecting the inlet tube 16 of the 4 delivery end departments of first gate valve, and this pipeline also is the pipeline of the 5 delivery end departments of first solenoid valve, intake branch 161's one end delivery end is connected the outside pipeline of taking the inlet tube 16 of the delivery end department of pressure self-operated valve 8, also is the pipeline of the 9 delivery end departments of second gate valve.
In order to read the pressure, the device is provided with a first pressure gauge 20 and a second pressure gauge 21, wherein the first pressure gauge 20 is connected with the three-way valve 10, and the second pressure gauge 21 is connected with the external pressure self-regulating valve 8.
In this embodiment, the outlet pipe 17 discharges the gas together with part of the water during the discharging process, so that the water tank 1 is connected to the other end of the outlet pipe 17, i.e., the end far from the oil well pipe section 11, and the outlet pipe 17 is provided with an exhaust valve 22 and a third electromagnetic valve 18 in this order along the flowing direction of the pipe.
In this embodiment, a safety valve 19 is further disposed on the pressure maintaining exhaust end cap 13 disposed at the right end of the oil well pipe section 11 to further ensure the safety of the device, after the device exhausts water, the safety valve 19 is closed to perform pressure test, and when the safety value of the safety valve 19 is 70-75MPa, and is greater than 75MPa, the safety valve 19 is opened to release pressure.
According to the requirements of the hydrostatic test specified in the API 5CT, each pipe is subjected to a full-length hydrostatic test, wherein the test pressure is as follows:
P＝(2×f×YSmin×t)/D；
p-hydrostatic test pressure (MPa);
f-coefficient, the 40KSI and 55KSI steel grade with specification larger than 95/8 is 0.6, and the others are 0.8;
YSmin — minimum yield strength of pipe (MPa);
d-specified outer diameter (mm);
t-defined wall thickness (mm).
This device is filling water and is carrying out test work during:
the method comprises the following steps: the first solenoid valve 5, the third solenoid valve 18, and the external pressure-taking self-regulating valve 8 are closed.
Step two: the first gate valve 4, the second solenoid valve 6, the second gate valve 9, and the exhaust valve 22 are opened.
Step three: and starting the rotary pump 2 to fill water into the device, closing the exhaust valve 22 when the exhaust valve 22 exhausts gas and starts to exhaust water, closing the first electromagnetic valve 5 and the second electromagnetic valve 6 at the same time, and starting the pressure pump 7 to test the pressure.
Step four: pressure test and self-force control:
and opening the external pressure-taking self-operated regulating valve 8, setting an external pressure-taking pressure gauge, namely a first pressure gauge 20, and setting the self-operated start-stop pressure value of the pressure pump 7 to be less than the test standard value and less than or equal to the test value +5 MPa. When the pressure value of the second pressure gauge 21 is smaller than the test pressure value, starting the booster pump 7 to supplement the test pressure; when the pressure value of the second pressure gauge 21 is greater than the test pressure 5MPa, the pressure pump 7 is closed.
Step five: and when the pressure pump 7 stops, observing the first pressure gauge 20, wherein the pressure value is not less than a standard test value, and the detection is qualified when the pressure maintaining time is 5 seconds and the pressure drop is less than 5 MPa.
The above description is only the preferred embodiment of the present invention; the scope of the present invention is not limited thereto. Any person skilled in the art should also be able to cover the technical scope of the present invention by replacing or changing the technical solution and the improvement concept of the present invention with equivalents and modifications within the technical scope of the present invention.
Claims (6)
1. The utility model provides an oil well pipe hydrostatic pressure testing arrangement, includes oil well pipe section (11) of the sample that awaits measuring, its characterized in that: the device comprises a water inlet pipe (16), a water inlet branch pipe (161) and a gas outlet pipe (17), wherein a male end of the oil well pipe section (11) is provided with a water injection testing end cover (12), and a female end is provided with a pressure maintaining exhaust end cover (13);
the water injection testing end cover (12) is connected with the outlet end of the water inlet pipe (16) and the inlet end of the air outlet pipe (17), the inlet end of the water inlet pipe (16) is connected with the water tank (1), and a rotary pump (2), a check valve (3), a first gate valve (4), a first electromagnetic valve (5), a pressure pump (7), an external pressure taking self-force adjusting valve (8), a second gate valve (9) and a three-way valve (10) are sequentially arranged on the water inlet pipe (16) along the flowing direction of the water inlet pipe (16);
a second electromagnetic valve (6) is arranged on the water inlet branch pipe (161), the inlet end of the water inlet branch pipe (161) is connected with a pipeline at the outlet end of the first gate valve (4), and the outlet end of the water inlet branch pipe (161) is connected with a pipeline at the outlet end of the external pressure-taking self-regulating valve (8);
the pressure measuring device comprises a first pressure gauge (20) and a second pressure gauge (21), wherein the first pressure gauge (20) is connected with a three-way valve (10), and the second pressure gauge (21) is connected with an external pressure-taking self-regulating valve (8);
an exhaust valve (22) and a third electromagnetic valve (18) are sequentially arranged on the air outlet pipe (17) along the circulation direction of the pipeline.
2. The hydrostatic testing device of claim 1, wherein: a first sealing ring (14) is arranged between the water injection testing end cover (12) and the male end of the oil well pipe section (11), and a second sealing ring (15) is arranged between the pressure maintaining exhaust end cover (13) and the female end of the oil well pipe section (11).
3. The hydrostatic testing device for the oil well pipe according to claim 2, wherein: and a safety valve (19) is arranged on the pressure maintaining exhaust end cover (13).
4. The hydrostatic testing device of claim 3, wherein: the first sealing ring (14) is matched with the male end of the oil well pipe section (11) in size, and the second sealing ring (15) is matched with the female end of the oil well pipe section (11) in size.
5. The hydrostatic testing device of claim 4, wherein: the first sealing ring (14) and the second sealing ring (15) are both non-metal rings.
6. The hydrostatic testing device of claim 5, wherein: the first sealing ring (14) and the second sealing ring (15) are rubber rings or silica gel rings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220593823.XU CN217156113U (en) | 2022-03-17 | 2022-03-17 | Hydrostatic pressure testing device for oil well pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220593823.XU CN217156113U (en) | 2022-03-17 | 2022-03-17 | Hydrostatic pressure testing device for oil well pipe |
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| Publication Number | Publication Date |
|---|---|
| CN217156113U true CN217156113U (en) | 2022-08-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220593823.XU Active CN217156113U (en) | 2022-03-17 | 2022-03-17 | Hydrostatic pressure testing device for oil well pipe |
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| Country | Link |
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| CN (1) | CN217156113U (en) |
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2022
- 2022-03-17 CN CN202220593823.XU patent/CN217156113U/en active Active
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