CN103994865A - Air-tight sealing detection apparatus of threaded connection of oil casing tubes - Google Patents
Air-tight sealing detection apparatus of threaded connection of oil casing tubes Download PDFInfo
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- CN103994865A CN103994865A CN201310054717.XA CN201310054717A CN103994865A CN 103994865 A CN103994865 A CN 103994865A CN 201310054717 A CN201310054717 A CN 201310054717A CN 103994865 A CN103994865 A CN 103994865A
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Abstract
The invention, which belongs to the field of petroleum and gas engineering and gas storage, discloses an air-tight sealing detection apparatus of threaded connection of oil casing tubes. The air-tight sealing detection apparatus comprises a liquid-gas power system, a detection gas source system and a detection execution system. The detection gas source system includes a booster energy storage device and a detection gas source. The detection execution system includes a detection tool, a gas collection sleeve and a leakage detection instrument; the detection tool includes a detection body, at least one central tube and a packer rubber sleeve; and a gas outlet valve is installed at the detection body. When detection is carried out, the detection gas enters a to-be-detected oil casing tube; and when detection is complete, the packer rubber sleeve is delocked and the detection gas is exhausted by an annulus cavity. The operation is convenient and the technology is reliable. Moreover, leakage data recorded by the leakage detection instrument can predict unsealed thread timely, thereby effectively removing the leaked thread. The secure guarantee can be provided for field detection of sealing of the oil casing tube; the massive loss caused by thread leakage can be avoided; and the long-time stable exploitation of gas well can be ensured.
Description
Technical field
The present invention relates to the fields such as petroleum gas engineering and gas storage, particularly a kind of oil casing threaded connection hermetic seal pick-up unit.
Background technology
Along with deep-well, horizontal well exploratory development technology are constantly promoted, and the large-scale development of rock gas and gas storage, more and more higher to the sealing requirements of tubing and casing.For ensureing the sealing into well tubing and casing, particularly some high-pressure gas wells, H
2s well, CO
2well, gas input well or densely populated regional well, gas storage well etc., it is particularly important that the sealing of tubing and casing seems.
Due to factors such as colliding with in the machining tolerance of tubing and casing, transportation, microcorrosions, particularly under high-pressure gas well in tubing and casing operation process as torque wrench moment is unreasonable and oil pipe Reusability etc. repeatedly, very easily cause sealing property to lose efficacy.There are statistics, the damage of oil casing, 90% left and right is caused by screw thread link.Therefore in time detecting oil casing threaded sealing, is the necessary means of stopping potential safety hazard, especially to the exploitation of the high sulfur Gas Fields of high pressure and gas storage note adopt produce extremely important.Yet domestic market is not also specifically designed to the oil casing threaded connection hermetic seal pick-up unit that detects oil casing threaded sealing.
Summary of the invention
In order to solve the above-mentioned problem that can detect in time oil casing threaded sealing, the embodiment of the present invention provides a kind of oil casing threaded connection hermetic seal pick-up unit.Described technical scheme is as follows:
On the one hand, provide a kind of oil casing threaded connection hermetic seal pick-up unit, for detection of the impermeability of oil casing collar screw thread, it comprises pneumatic motive power system, detects air supply system and detects executive system; Detecting air supply system comprises booster-type accumulator and operationally connects in booster-type accumulator and to increasing the detection source of the gas of carrying detection gas in accumulator; Pneumatic motive power system comprises operationally to be connected in booster-type accumulator and to the water source that injects water under high pressure in booster-type accumulator; Detect executive system and comprise testing tool, gas-collecting sleeve and leak locator, testing tool is operationally placed in tubing and casing to be detected, and by be detected section of sealing of tubing and casing to be measured, gas-collecting sleeve is arranged on the outer peripheral face of the box cupling of tubing and casing to be detected, leak locator is connected with gas-collecting sleeve; Testing tool comprises detection body; At least one pipe core and the fixed cover that are fixed on detection body are located at the corresponding packing element outside at least one pipe core; Detect the annular space that the outer wall of body and the inwall of tubing and casing to be detected are formed with sealing, detect the air outlet valve assembly that perforation or blocking-up annular space and pipe core are installed on body; Gas in booster-type accumulator operationally enters in pipe core; When detecting, the detection gas detecting in source of the gas enters in tubing and casing to be measured by booster-type accumulator, pipe core and air outlet valve assembly successively; After detection completes, packing element deblocking, detects gas and discharges by annular space.
Further, also comprise control system, control system comprises main control system, booster-type accumulator is provided with the liquid inlet being connected with water source, pneumatic motive power system connects main control system, and pneumatic motive power system also comprises interconnective low pressure centrifugal pump and high-pressure plunger pump, and low pressure centrifugal pump is connected in water source, and high-pressure plunger pump is connected in liquid inlet.
Further, between water source and liquid inlet, be also provided with the first high pressure pressure-release valve that is connected main control system.
Further, on liquid inlet, be also serially connected with a high pressure gauge being electrically connected to main control system, between high-pressure plunger pump and liquid inlet, be also serially connected with high pressure retaining valve.
Further, booster-type accumulator is also provided with the gas access being connected with pipe core, detect air supply system and also comprise the first high-pressure stop valve and the second high-pressure stop valve being connected with main control system, the first high-pressure stop valve is connected in gas access, and the second high-pressure stop valve is connected to the first high-pressure stop valve and pipe core.
Further, the first end of pipe core is provided with gas-tpe fitting, and the second end of pipe core is provided with the orienting lug of being convenient to put into tubing and casing to be measured; The second high-pressure stop valve is connected to the first high-pressure stop valve and gas-tpe fitting.
Further, between the second high-pressure stop valve and gas-tpe fitting, be also serially connected with a high pressure gauge that is connected main control system.
Further, gas-tpe fitting is fixed on pipe core by a top connection, and is equipped with O-ring seal between gas-tpe fitting and top connection and top connection and pipe core.
Further, detect source of the gas and be connected in gas access, and be also serially connected with successively gas stop valve and high pressure retaining valve between detection source of the gas and gas access.
Further, control system also comprises the winch being connected with main control system, testing tool be provided with one operationally with the operation ring of winch lifting.
The beneficial effect that the technical scheme that the embodiment of the present invention provides is brought is: oil casing threaded connection hermetic seal pick-up unit of the present invention flows to testing tool after detection gas being increased by accumulator, and will detect gas discharging to tubing and casing to be measured by detecting; Recycling is collected cover and is collected the detection gas that leak at the box cupling place of tubing and casing to be measured, and by leak locator to on-the-spot or enter detecting of tubing and casing in well process, easy to operate, technology is reliable, and implementation cost is low.The leak data recording in display screen by leak locator gives a forecast to blow-by screw thread in time, effectively reject the screw thread of revealing, for Site Detection oil pipe and sleeve pipe overall tightness provide safety guarantee, avoid, because screw thread leaks the massive losses causing, having guaranteed the stable exploitation that gas well is long-term.Oil casing threaded connection hermetic seal pick-up unit of the present invention utilizes control desk automatic operation, on-the-spot workable, and operation is rapid, does not affect on-the-spot other operation process.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing of required use during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of the oil casing threaded connection hermetic seal pick-up unit that provides of the embodiment of the present invention;
Fig. 2 is the structural representation of the testing tool in Fig. 1.
Embodiment
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.
Referring to Fig. 1, the embodiment of the present invention provides a kind of oil casing threaded connection hermetic seal pick-up unit for to equipment such as the oil casing threaded pair in scene and ground delivery line, christmas trees, before entering well and using, test envelope and detect, to guarantee the impermeability of tubing and casing and ground delivery line, christmas tree.This oil casing threaded connection hermetic seal pick-up unit comprises control system 1, the pneumatic motive power system 3 being connected with control system 1, the detection air supply system 5 being connected with control system 1 and the detection executive system 9 being connected with control system 1.
Control system 1 comprises main control system 10, is integrated on main control system 10 and is convenient to monitoring and selects the control desk 11 of operation and the winch 13 being connected with main control system 10.By selecting the operation item on control desk 11 to trigger main control system 10, then send by main control system 10 running that control signal is controlled pneumatic motive power system 3, detected air supply system 5 and detection executive system 9.Preferably, in the present embodiment, control desk 11 is provided with operation screen, by selection, operates the selection button on screen, controls the motion of pneumatic motive power system 3, detection air supply system 5 and detection executive system 9.
Detecting air supply system 5 comprises booster-type accumulator 7, detects source of the gas 51, the first high-pressure stop valve 53 and the second high-pressure stop valve 55.Booster-type accumulator 7 is provided with 71Ji gas access, liquid inlet 73.Detect source of the gas 51 and connect and be connected with the gas access 73 of booster-type accumulator 7, to inject, detect gas in booster-type accumulator 7, and be also serially connected with successively gas stop valve 511 and high pressure retaining valve 513 between detection source of the gas 51 and gas access 73.Between gas stop valve 51 and detection source of the gas 5, be also serially connected with gas pressure-release valve 57.Preferably, in the present embodiment, detecting source of the gas 51 is helium nitrogen gas mixing device, helium tank and nitrogen cylinder or helium nitrogen mixed gas bottle.
The first high-pressure stop valve 53 and the second high-pressure stop valve 55 all connect main control system 10, are controlled the opening and closing of this first high-pressure stop valve 53 and the second high-pressure stop valve 55 by main control system 10.After the first high-pressure stop valve 53 is connected with the outlet of high pressure retaining valve 513, be connected in the lump the gas access 73 of booster-type accumulator 7.The second high-pressure stop valve 55 is connected in series with the first high-pressure stop valve 53.
Pneumatic motive power system 3 comprises water source 31, low pressure centrifugal pump 33 and the high-pressure plunger pump 35 that water under high pressure is provided to booster-type accumulator 7.In the present embodiment, water source 31 is stainless steel water tank, and the entrance at water source 31 is connected perforation with the liquid inlet 71 of booster-type accumulator 7, like this, booster-type accumulator 7 utilizes the high-pressure water from pneumatic motive power system 3 to carry out supercharging to the helium nitrogen mixture gas entering in booster-type accumulator 7.Between 31He liquid inlet, water source 71, be provided with the first high pressure pressure-release valve 37.The first high pressure pressure-release valve 37 connects main control system 10, controls the break-make of the first high pressure pressure-release valve 37 by main control system 10, thereby controls circulation or the shutoff of liquid between booster-type accumulator 7 and water source 31.Preferably, in the present embodiment, between the first high pressure pressure-release valve 37 and liquid inlet 71, be also provided with a high pressure gauge 39 that plays monitoring effect, and these high pressure gauge 39 connection main control systems 10, so that in time the pressure signal in the booster-type accumulator monitoring 7 is sent to main control system 10.Low pressure centrifugal pump 33 is connected in series mutually with high-pressure plunger pump 35, and all connects main control system 10; Low pressure centrifugal pump 33 is connected with the entrance at water source 31; High-pressure plunger pump 35 is connected perforation with liquid inlet 71.Preferably, in the present embodiment, between low pressure centrifugal pump 33 and the entrance at water source 31, be serially connected with filtrator 32; Between high-pressure plunger pump 35 and liquid inlet 71, be serially connected with high pressure retaining valve 34.
Detect executive system 9 and comprise testing tool 91, gas-collecting sleeve 93 and leak locator 95.Testing tool 91 is connected in main control system 10 by second high-pressure decompression valve 97, thereby by main control system 10, is controlled the motion of testing tool 91.Testing tool 91 is connected in the gas access 73 of booster-type accumulator 7, for the detection gas inject in booster-type accumulator 7 is arrived in tubing and casing to be detected, and by be detected section of sealing of tubing and casing to be measured.Gas-collecting sleeve 93 is for covering on the outside of oil casing collar to be detected, for collecting the detection gas from leaking out along screw thread pair in oil casing collar to be detected.Gas-collecting sleeve 93 is airtight cover, and is only provided with a small opening.Leak locator 95 is for detection of the content of the tubing and casing gas leakage detecting, and it is connected with gas-collecting sleeve 93 by a pipeline (not shown).Pipeline is through the minute opening of gas-collecting sleeve 93, and the pipeline of pipeline probe (not shown) is positioned at gas-collecting sleeve 93.Leak locator 95 also comprises a display screen (not shown) that shows leakage value.
Incorporated by reference to reference to Fig. 2, testing tool 91 comprise hollow detection body 911, be fixed on the pipe core 912 that detects on body 911 and fixed cover at the packing element 914 of the outer peripheral face of pipe core 912.Wherein, pipe core 912 aligns and is socketed side by side with detection body 911, and the center pit of pipe core 912 aligns and is communicated with the hollow that detects body 911.When detecting, testing tool 91 is placed in tubing and casing to be detected, and detect the outer wall of body 911 and tubing and casing to be detected in be formed with annular space (not shown) between keeping away.
The periphery of the first end of pipe core 912 is fixed with top connection 916, and in top connection 916, is fixed with the gas-tpe fitting 917 being connected with the second high-pressure decompression valve 97.Gas-tpe fitting 917 is also connected with the second high-pressure stop valve 55 that detects air supply system 5, preferably, in the present embodiment, between gas-tpe fitting 917 and the second high-pressure stop valve 55, be serially connected with high pressure gauge 22, and this high pressure gauge 22 connects main control system 10, so that high pressure gauge 22 is sent to main control system 10 by the pressure signal in the testing tool monitoring 91 in time.The second end of pipe core 912 is fixed with an orienting lug 918.Preferably, in the present embodiment, this orienting lug 918 exposes to position tapered of pipe core 912, so that put into the process of tubing and casing to be detected at testing tool 91, guiding testing tool 91 enters in tubing and casing to be detected rapidly.Preferably, in the present embodiment, in order to improve sealing effectiveness, between above-mentioned gas-tpe fitting 917 and top connection 916 and top connection 916 and pipe core 912, be equipped with O-ring seal (not label).
Detect body 911 and be provided with the through hole 20 connecting with the external world, and in this through hole 20, air outlet valve assembly 21 is installed.Detection body 911 opens or closes by this air outlet valve assembly 21, makes the center pit inside of pipe core 912 be communicated with annular space or block.Air outlet valve assembly 21 comprises the valve rod 24 being slidably mounted in through hole 20 and is enclosed within the back-moving spring 23 on valve rod 24, and valve rod 24 is provided with a plug 25 of operationally closing or opening through hole 20.While having entered detection gas in the center pit of pipe core 912, detecting gas enters in detection body 911, thereby by gas pressure intensity, force valve rod 24 outwards to move, and open through hole 20, the detection gas in testing tool 91 is entered in tubing and casing to be detected by through hole 20; When the gaseous tension in detecting body 911 reaches and sets pressure, air outlet valve assembly 21 is closed immediately, and now, the plug 25 of valve rod 24 stops up through hole 20, and air outlet valve assembly 21 is closed immediately.
Preferably, for the ease of operation, testing tool 91 be provided with one operationally with the fixing operation ring 6 of the winch 13 of control system 1, particularly, in the present embodiment, operation ring 6 is arranged in top connection 916.
In other embodiments, according to the length needs of tubing and casing to be detected, above-mentioned testing tool 91 can be established one or more pipe cores and corresponding packing element.
When using oil casing threaded connection hermetic seal pick-up unit of the present invention, it is opening that main control system 10 is controlled the second high-pressure decompression valve 97; And the gas stop valve 511 in open detection air supply system 5 simultaneously, make to detect detection gas inject in source of the gas 51 to booster-type accumulator 7; When the gas pressure intensity in the booster-type accumulator 7 of high pressure gauge 39 test reaches the first pressure P1, close gas stop valve 511 and stop to injecting gas in booster-type accumulator 7.Now, main control system 10 starts high-pressure plunger pumps 35, and the high-pressure water in water source 31 is entered in booster-type accumulator 7, with the detection gas boosting in booster-type accumulator 7 to pressure the second pressure P2.At this moment, main control system 10 is controlled the operation ring 6 that winches 13 hook testing tool 91, the testing tool 91 testing tool 91 is transferred to tubing and casing to be checked sling, and adjust testing tool 91 over against the box cupling of tubing and casing to be checked.Gas-collecting sleeve 93 is arranged on to the outside of oil casing collar to be measured, and leak locator 95 is connected in to gas-collecting sleeve 93.
After testing tool 91, gas-collecting sleeve 93 and leak locator 95 install, main control system 10 is closed the second high-pressure decompression valve 97, and opens the first high-pressure stop valve 53 and the second high-pressure stop valve 55 simultaneously.Now, after the gas-tpe fitting 917 of the detection gas of booster-type accumulator 7 by testing tool 91 enters this testing tool 91, enter again in tubing and casing to be detected.Then, main control system 10 starts low pressure centrifugal pump 33, high-pressure water in water source 31 is entered in booster-type accumulator 7, the detected pressures P3 extremely needing with the detection gas boosting in booster-type accumulator 7, and keep this detected pressures P3 after a period of time, observe the leak data recording in the display screen of leak locator 95.The leakage value detecting when leak locator 95 during higher than predefined leakage value, illustrates tubing and casing gas leakage to be detected, need to be to oil casing threaded rectification to be detected; The leakage value detecting when leak locator 95 during lower than predefined leakage value, illustrates that tubing and casing to be detected is qualified, meets seal request, can enter well and use.
After detection, main control system 10 is controlled and is opened the first high pressure pressure-release valve 37 and the second high pressure pressure-release valve 97.At this moment, the first high pressure pressure-release valve 37 is laid down the pressure in booster-type accumulator 7, and the detection gas of being convenient to detect in source of the gas 51 enters booster-type accumulator 7 in next sense cycle; Meanwhile, the increase water source of booster-type accumulator 7 is back to water source 31.The second high pressure pressure-release valve 97 1 is opened, the air outlet valve assembly 21 of testing tool 91 is opened, packing element 914 deblockings of testing tool 91, in testing tool, 91 high pressure detection gas is discharged by the annular space between the outer wall of testing tool 91 and the inwall of tubing and casing to be measured.
From above-mentioned narration: oil casing threaded connection hermetic seal pick-up unit of the present invention flow to testing tool 91 after will detection gas increasing by booster-type accumulator 7, and will detect gas discharging extremely in tubing and casing to be measured by detecting 91; Recycling is collected cover 93 and is collected the detection gas that leak at the box cupling places of tubing and casing to be measured, and by 95 pairs of scenes of leak locator or enter detecting of tubing and casing in well process, easy to operate, technology is reliable, and implementation cost is low.The leak data recording in display screen by leak locator 95 gives a forecast to blow-by screw thread in time, effectively reject the screw thread of revealing, for Site Detection oil pipe and sleeve pipe overall tightness provide safety guarantee, avoid, because screw thread leaks the massive losses causing, having guaranteed the stable exploitation that gas well is long-term.Oil casing threaded connection hermetic seal pick-up unit of the present invention utilizes main control system 10 automatic operations, on-the-spot workable, and operation is rapid, does not affect on-the-spot other operation process.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. an oil casing threaded connection hermetic seal pick-up unit, impermeability for detection of oil casing collar screw thread, it is characterized in that, described oil casing threaded connection hermetic seal pick-up unit comprises pneumatic motive power system (3), detects air supply system (5) and detects executive system (9);
Described detection air supply system (5) comprises booster-type accumulator (7) and operationally connects in described booster-type accumulator (7) and in described increase accumulator (7) and carry the detection source of the gas (51) that detects gas;
Described pneumatic motive power system (3) comprises operationally to be connected in described booster-type accumulator (7) and to injecting the water source (31) of water under high pressure in described booster-type accumulator (7);
Described detection executive system (9) comprises testing tool (91), gas-collecting sleeve (93) and leak locator (95), described testing tool (91) is operationally placed in described tubing and casing to be detected, and by be detected section of sealing of described tubing and casing to be measured, described gas-collecting sleeve (93) is arranged on the outer peripheral face of the box cupling of described tubing and casing to be detected, and described leak locator (95) is connected with described gas-collecting sleeve (93);
Described testing tool (91) comprises detection body (911); At least one pipe core (912) and the fixed cover that are fixed on described detection body (911) are located at the corresponding packing element (914) outside described at least one pipe core; The outer wall of described detection body (911) and the inwall of described tubing and casing to be detected are formed with the annular space of sealing, and the air outlet valve assembly (21) that connects or block described annular space and described pipe core (912) is installed on described detection body (911);
Gas in described booster-type accumulator (7) operationally enters in described pipe core (912);
When detecting, the detection gas in described detection source of the gas (51) enters in described tubing and casing to be measured by described booster-type accumulator (7), pipe core (912) and described air outlet valve assembly (21) successively; After detection completes, described packing element deblocking (914), described detection gas is discharged by described annular space.
2. oil casing threaded connection hermetic seal pick-up unit according to claim 1, it is characterized in that, also comprise control system (1), described control system (1) comprises main control system 10, described booster-type accumulator (7) is provided with the liquid inlet (71) being connected with described water source (31), described pneumatic motive power system (3) connects described main control system (10), and described pneumatic motive power system (3) also comprises interconnective low pressure centrifugal pump (33) and high-pressure plunger pump (35), described low pressure centrifugal pump (33) is connected in described water source (31), described high-pressure plunger pump (35) is connected in described liquid inlet (71).
3. oil casing threaded connection hermetic seal pick-up unit according to claim 2, is characterized in that, between described water source (31) and described liquid inlet (71), is also provided with the first high pressure pressure-release valve (37) that is connected described main control system (10).
4. oil casing threaded connection hermetic seal pick-up unit according to claim 2, it is characterized in that, on described liquid inlet (71), be also serially connected with a high pressure gauge (39) being electrically connected to described main control system (10), between described high-pressure plunger pump (35) and described liquid inlet (71), be also serially connected with high pressure retaining valve (34).
5. oil casing threaded connection hermetic seal pick-up unit according to claim 2, it is characterized in that, described booster-type accumulator (7) is also provided with the gas access (73) being connected with described pipe core (912), described detection air supply system (5) also comprises the first high-pressure stop valve (53) and the second high-pressure stop valve (55) being connected with described main control system (10), described the first high-pressure stop valve (53) is connected in described gas access (73), described the second high-pressure stop valve (55) is connected to described the first high-pressure stop valve (53) and described pipe core (912).
6. oil casing threaded connection hermetic seal pick-up unit according to claim 5, it is characterized in that, the first end of described pipe core (912) is provided with gas-tpe fitting (917), and the second end of described pipe core (912) is provided with the orienting lug (918) of being convenient to put into described tubing and casing to be measured; Described the second high-pressure stop valve (55) is connected to described the first high-pressure stop valve (53) and described gas-tpe fitting (917).
7. oil casing threaded connection hermetic seal pick-up unit according to claim 6, it is characterized in that, between described the second high-pressure stop valve (55) and described gas-tpe fitting (917), be also serially connected with a high pressure gauge (22) that is connected described main control system (10).
8. oil casing threaded connection hermetic seal pick-up unit according to claim 6, it is characterized in that, described gas-tpe fitting (917) is fixed on described pipe core (912) by a top connection (916), and is equipped with O-ring seal between described gas-tpe fitting (917) and described top connection (916) and described top connection (916) and described pipe core (912).
9. oil casing threaded connection hermetic seal pick-up unit according to claim 5, it is characterized in that, described detection source of the gas (51) is connected in described gas access (73), and is also serially connected with successively gas stop valve (511) and high pressure retaining valve (513) between described detection source of the gas (51) and described gas access (73).
10. oil casing threaded connection hermetic seal pick-up unit according to claim 5, it is characterized in that, described control system (1) also comprises the winch (13) being connected with described main control system (10), described testing tool (91) be provided with one operationally with the operation ring (6) of described winch (13) lifting.
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| CN201310054717.XA CN103994865B (en) | 2013-02-20 | 2013-02-20 | Oil casing threaded connection pneumatic sealing test device |
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| CN201310054717.XA CN103994865B (en) | 2013-02-20 | 2013-02-20 | Oil casing threaded connection pneumatic sealing test device |
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| CN110160707A (en) * | 2018-01-30 | 2019-08-23 | 张佳宁 | A kind of tubing and casing antisepsis production line leak source automatic detection device |
| CN110346092A (en) * | 2019-08-02 | 2019-10-18 | 维特力（深圳）流体工程有限公司 | Liquid drives formula tubing and casing pneumatic sealing test device |
| CN112901138A (en) * | 2019-11-17 | 2021-06-04 | 中石化石油工程技术服务有限公司 | Sleeve air-tight seal detection device |
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| CN106644316B (en) * | 2017-03-02 | 2023-07-25 | 西南石油大学 | Oil sleeve thread air tightness detection device, detection system and detection method thereof |
| CN110160707A (en) * | 2018-01-30 | 2019-08-23 | 张佳宁 | A kind of tubing and casing antisepsis production line leak source automatic detection device |
| CN110346092A (en) * | 2019-08-02 | 2019-10-18 | 维特力（深圳）流体工程有限公司 | Liquid drives formula tubing and casing pneumatic sealing test device |
| CN112901138A (en) * | 2019-11-17 | 2021-06-04 | 中石化石油工程技术服务有限公司 | Sleeve air-tight seal detection device |
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