CN117571223A - Full-closed wellhead tightness inspection device - Google Patents
Full-closed wellhead tightness inspection device Download PDFInfo
- Publication number
- CN117571223A CN117571223A CN202210945575.5A CN202210945575A CN117571223A CN 117571223 A CN117571223 A CN 117571223A CN 202210945575 A CN202210945575 A CN 202210945575A CN 117571223 A CN117571223 A CN 117571223A
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- Prior art keywords
- hydraulic cylinder
- piston
- fully
- sealing
- testing device
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Links
- 238000007689 inspection Methods 0.000 title abstract description 6
- 238000012360 testing method Methods 0.000 claims abstract description 35
- 238000007789 sealing Methods 0.000 claims description 45
- 210000002445 nipple Anatomy 0.000 claims description 14
- 230000008878 coupling Effects 0.000 claims description 9
- 238000010168 coupling process Methods 0.000 claims description 9
- 238000005859 coupling reaction Methods 0.000 claims description 9
- 230000006835 compression Effects 0.000 claims description 8
- 238000007906 compression Methods 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 125000006850 spacer group Chemical group 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 15
- 238000001514 detection method Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 18
- 241000191291 Abies alba Species 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
Landscapes
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- General Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention discloses a fully-closed wellhead tightness testing device which comprises a plugging tool, a hydraulic pump, a pressure testing pump and a numerical display instrument, wherein the plugging tool is connected with the hydraulic pump through a first hydraulic pipeline, the plugging tool is connected with the pressure testing pump through a first hydraulic pipeline, and the pressure testing pump is connected with the numerical display instrument through a sensor connecting line. The invention has simple processing and manufacturing and low investment; the method is safe and reliable, has obvious inspection effect, and is approved by site constructors and technicians. In field applications: the pressure test plugging tool is suitable for verifying and checking the tightness of the 250 type and 350 type oil (gas) production trees after being installed, can be quickly assembled according to the matching condition of the on-site oil (gas) production tree and the inner pipe column of the well, and can be used for remotely checking the tightness detection condition of the oil (gas) production tree by a manager through a mobile phone.
Description
Technical Field
The invention relates to the technical field of drilling and underground operation, in particular to a fully-closed wellhead tightness inspection device.
Background
The oil (gas) extraction tree is a wellhead device for oil field exploitation, and is an important device for controlling and regulating oil and gas production at the uppermost part of an oil and gas well. At present, in the workover operation process, when the oil (gas) extraction tree is installed at the wellhead, the flange connection needs to be fastened 12 screws through the manual work on lower flange and the big cross, but often can influence the leakproofness of connecting part because of the screw is not tight, go up unevenly or steel ring and steel ring groove have problem, the phenomenon is leaked to the wellhead thorn often can appear when the oil gas well is produced, there is certain well control potential safety hazard, serious can lead to blowout accident to cause environmental pollution accident to take place, in order to ensure the well control safety of wellhead, the difficult problem of the inspection of christmas tree leakproofness needs to be solved.
Disclosure of Invention
The invention provides a fully-closed wellhead tightness testing device for solving the problem that tightness of a connecting part of a lower flange and an upper flange of a large four-way joint cannot be tested after an oil (gas) production tree is installed at present, so that tightness testing of a final gateway after the oil (gas) production tree is installed is realized, wellhead puncture and leakage phenomena are avoided, and wellhead well control safety is ensured.
In order to solve the technical problems, the technical scheme of the invention is as follows: the utility model provides a totally closed well head leakproofness verifying attachment, includes shutoff instrument, hydraulic pump, test pump, numerical display instrument, and shutoff instrument links to each other with the hydraulic pump through hydraulic line one, and the shutoff instrument links to each other with the test pump through hydraulic line one, and the test pump passes through the sensor connecting wire and links to each other with the numerical display instrument.
Further, the plugging tool comprises an upper joint, and the central internal thread of the upper joint is sequentially connected with the sealing shaft, the connecting rod, the mandrel and the tail plug; the external thread of the upper joint is connected with a hydraulic cylinder, the hydraulic cylinder is respectively connected with a water adding pipe and an exhaust pipe, and the exhaust pipe is connected with a 35Mpa ball valve; the inside of the hydraulic cylinder is in sliding and sealing connection with the pup joint; the inner thread of the piston is connected with the nipple, a spring is arranged between the piston and the hydraulic cylinder, and the nipple is sequentially connected with the connecting pipe, the tail pipe, the compression ring, the two rubber cylinders and the tail plug; the outer circumference of the piston is in sliding and sealing connection with the hydraulic cylinder, the inner circumference of the piston is in sliding and sealing connection with the sealing shaft, and the piston is sealed with the nipple.
Further, the outer diameters of the upper joint and the hydraulic cylinder are equal and are phi 100 mm-phi 130mm, and the upper joint and the hydraulic cylinder are fastened through an inner hexagon screw.
Further, two sealing rings IV are arranged in the hydraulic cylinder and are in sliding and sealing connection with the contact part of the short joint.
Further, the sealing shaft is connected with the connecting rod through a connecting rod coupling.
Further, the nipple joint is connected with the connecting pipe through the coupling.
Further, the two rubber cylinders are separated by a separation ring.
Further, the outer diameters of the compression ring, the rubber cylinder, the spacing ring and the tail plug are equal and are phi 48 mm-phi 62mm.
Further, the piston and the short joint are sealed by a sealing ring three.
Further, the outer circumference of the piston slides with the hydraulic cylinder and is in sealing connection with the hydraulic cylinder through the first sealing rings, and the inner circumference of the piston slides with the sealing shaft and is in sealing connection with the sealing shaft through the second sealing rings.
The invention has simple processing and manufacturing and low investment; the method is safe and reliable, has obvious inspection effect, and is approved by site constructors and technicians. In field applications: the pressure test plugging tool is suitable for verifying and checking the tightness of the 250 type and 350 type oil (gas) production trees after being installed, can be quickly assembled according to the matching condition of the on-site oil (gas) production tree and the inner pipe column of the well, and can be used for remotely checking the tightness detection condition of the oil (gas) production tree by a manager through a mobile phone.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic diagram of a plugging tool;
fig. 3 is a schematic diagram of a second plugging tool configuration.
Wherein: 1. an upper joint; 2. a hydraulic cylinder; 3. a piston; 4. sealing the shaft; 5. a spring; 6. a water supply pipe; 7. a connecting rod coupling; 8. a short section; 9. a connecting rod; 10. coupling; 11. a connecting pipe; 12. a mandrel; 13. a tail pipe; 14. a compression ring; 15. a rubber cylinder; 16. a spacer ring; 17. tail blocking; 18. an inner hexagon screw; 19. a first sealing ring; 20. a second sealing ring; 21. a third sealing ring; 22. a sealing ring IV; 23.35Mpa ball valve; 24. an exhaust pipe; 25. a plugging tool; 26. a first hydraulic pipeline; 27. a hydraulic pump; 28. a pressure test pump; 29. a numerical value display instrument; 30. and a sensor connecting wire.
Detailed Description
Embodiments of the present invention are further described below with reference to FIGS. 1-3.
The utility model provides a totally closed well head leakproofness verifying attachment, includes shutoff instrument 25, hydraulic pump 27, pressure test pump 28, numerical display instrument 29, and shutoff instrument 25 links to each other with hydraulic pump 27 through hydraulic line one 26, and shutoff instrument 25 links to each other with pressure test pump 28 through hydraulic line one 26, and pressure test pump 28 links to each other with numerical display instrument 29 through sensor connecting wire 30.
The plugging tool 25 comprises an upper joint 1, and the central internal thread of the upper joint 1 is sequentially connected with a sealing shaft 4, a connecting rod 9, a mandrel 12 and a tail plug 17; the sealing shaft 4 is connected with the connecting rod 9 through a connecting rod coupling 7; the external thread of the upper joint 1 is connected with the hydraulic cylinder 2, the external diameters of the upper joint 1 and the hydraulic cylinder 2 are equal, and are phi 100 mm-phi 130mm, preferably phi 120mm, and the upper joint 1 and the hydraulic cylinder 2 are fastened through the socket head cap screws 18. The hydraulic cylinder 2 is respectively connected with a water adding pipe 6 and an exhaust pipe 24, and the exhaust pipe 24 is connected with a 35Mpa ball valve 23; two sealing rings IV 22 are arranged in the hydraulic cylinder 2 and are in sliding and sealing connection with the contact part of the short section 8; the internal thread of the piston 3 is connected with a short joint 8, a spring 5 is arranged between the piston 3 and the hydraulic cylinder 2, and the short joint 8 is sequentially connected with a connecting pipe 11, a tail pipe 13, a compression ring 14, two rubber cylinders 15 and a tail plug 17; the two rubber cylinders 15 are separated by a separation ring 16. The outer diameters of the pressing ring 14, the rubber cylinder 15, the spacing ring 16 and the tail plug 17 are equal, and are phi 48 mm-phi 62mm, preferably phi 58mm. The nipple 8 is connected with a connecting pipe 11, and the connecting pipe 11 is connected with a tail pipe 13 through a coupling 10. The outer circumference of the piston 3 slides with the hydraulic cylinder 2 and is in sealing connection with the hydraulic cylinder 2 through two first sealing rings 19, the inner circumference of the piston 3 slides with the sealing shaft 4 and is in sealing connection with the sealing shaft 4 through two second sealing rings 20, and the piston 3 and the short joint 8 are sealed through a third sealing ring 21.
The tool upper joint 1 is provided with a hydraulic oil inlet hole, the upper end of the tool upper joint is provided with a 27/8 "" TBG female buckle, and the tool upper joint can be connected with a 27/8 "" TBG oil pipe nipple to play a lifting role. A hole is formed in the middle body of the hydraulic cylinder 2 for exhausting. The clamp head at the lower end can be connected with the gate of the production tree through slips. The inside of the hydraulic cylinder 2 is provided with 2 sealing rings IV 22 which are in sliding sealing with the contact part of the short section 8, so as to prevent the pressure test medium from leaking. The spring 5 can push the piston 3 to reset after pressure release. The outer diameters of the compression ring 14, the rubber cylinder 15, the spacing ring 16 and the tail plug 17 are equal, and the oil production tree and the oil pipe hanger can be smoothly passed through.
The numerical display instrument is composed of a sensor module, a display module, a printing module, a data transmission module and the like, and has the functions of displaying pressure curve information, printing, data transmission and the like on line. And when the tightness detection of the oil and gas production tree is carried out, the data in the numerical display instrument can be transmitted to the mobile phone terminal of the manager through the wireless network, and the manager can remotely check the tightness detection condition, so that the supervision and management of the construction key node are facilitated.
When the hydraulic pump is applied to the site, the connecting pipe 11 and the connecting rod 10 with different sizes are matched according to the size of the Christmas tree, the rubber sleeve 15 is positioned in an oil pipe, the plugging tool 25 is put down, the plugging tool 25 is connected with the Christmas tree by slips, and the hydraulic pump 27, the pressure test pump 28 and the numerical display instrument 29 are connected. The hydraulic pump 27 is used for pressing 10-15Mpa, the piston 3 in the plugging tool 25 descends, the spring 5 is compressed, the nipple 8, the coupling 10, the connecting pipe 11 and the tail pipe 13 connected with the piston 5 push the compression ring 14 to move downwards, and the two rubber cylinders 15 are compressed and expanded to plug the parts above the rubber cylinders 15. Pressure test medium is added into the inner cavity of the Christmas tree through the water adding pipe 6, and the air in the inner cavity is discharged through the exhaust pipe 24. After the medium is filled up, the pressure is applied by the pressure test pump 28, the highest pressure can reach 35Mpa, the pressure is stabilized for 30 minutes, the pressure drop is smaller than 0.5Mpa, the design requirement is met, and the installation tightness of the christmas tree is confirmed to be qualified. The numerical display instrument 29 can display the pressure test pressure curve information on line and print a pressure test curve report, and meanwhile, a manager can remotely check the on-site pressure test curve by utilizing a mobile phone. After the pressure in the inner cavity of the oil and gas extraction tree and the pressure in the hydraulic cylinder 2 are removed, the piston 3 is gradually reset under the working force of the spring 5 to drive the nipple 8, the connecting pipe 11 and the tail pipe 13 to move upwards, and the two compressed rubber cylinders 15 are gradually restored to the original state. The connecting pipe 11 and the connecting rod 10 in the device can be processed into different sizes so as to meet the tightness test of the oil and gas production trees with different heights.
The present invention is not limited to the above-mentioned embodiments, but any person skilled in the art, based on the technical solution of the present invention and the inventive concept thereof, can be replaced or changed equally within the scope of the present invention.
Claims (10)
1. The utility model provides a totally closed well head leakproofness verifying attachment, its characterized in that includes shutoff instrument (25), hydraulic pump (27), test pump (28), numerical display instrument (29), and shutoff instrument (25) link to each other with hydraulic pump (27) through hydraulic line one (26), and shutoff instrument (25) link to each other with test pump (28) through hydraulic line one (26), and test pump (28) link to each other with numerical display instrument (29) through sensor connecting wire (30).
2. The fully-closed wellhead tightness testing device according to claim 1, wherein the plugging tool (25) comprises an upper joint (1), and the central internal thread of the upper joint (1) is sequentially connected with a sealing shaft (4), a connecting rod (9), a mandrel (12) and a tail plug (17); the external thread of the upper joint (1) is connected with a hydraulic cylinder (2), the hydraulic cylinder (2) is respectively connected with a water adding pipe (6) and an exhaust pipe (24), and the exhaust pipe (24) is connected with a 35Mpa ball valve (23); the inside of the hydraulic cylinder (2) is in sliding and sealing connection with the short section (8); the internal thread of the piston (3) is connected with the nipple (8), a spring (5) is arranged between the piston (3) and the hydraulic cylinder (2), and the nipple (8) is connected with the connecting pipe (11), the tail pipe (13), the compression ring (14), the two rubber barrels (15) and the tail plug (17) in sequence; the outer circumference of the piston (3) is in sliding and sealing connection with the hydraulic cylinder (2), the inner circumference of the piston (3) is in sliding and sealing connection with the sealing shaft (4), and the piston (3) is sealed with the nipple (8).
3. The fully-closed wellhead tightness testing device according to claim 2, wherein the outer diameters of the upper joint (1) and the hydraulic cylinder (2) are equal and are phi 100 mm-phi 130mm, and the upper joint (1) and the hydraulic cylinder (2) are fastened through an inner hexagon screw (18).
4. The fully-closed wellhead tightness testing device according to claim 2, wherein the hydraulic cylinder (2) is internally provided with two sealing rings four (22) and is in sliding and sealing connection with the contact part of the nipple (8).
5. The fully-closed wellhead tightness testing device according to claim 2, wherein the sealing shaft (4) is connected with the connecting rod (9) through a connecting rod coupling (7).
6. The fully-closed wellhead tightness testing device according to claim 2, wherein the nipple (8) is connected with the connecting pipe (11), and the connecting pipe (11) is connected with the tail pipe (13) through the coupling (10).
7. The fully-closed wellhead tightness testing device according to claim 2, wherein the two rubber cylinders (15) are separated by a spacer ring (16).
8. The fully-closed wellhead tightness testing device according to claim 7, wherein the outer diameters of the compression ring (14), the rubber cylinder (15), the spacer ring (16) and the tail plug (17) are equal and are phi 48 mm-phi 62mm.
9. The fully-closed wellhead tightness testing device according to claim 2, wherein the piston (3) and the nipple (8) are sealed by a sealing ring III (21).
10. The fully-closed wellhead tightness testing device according to claim 2, wherein the outer circumference of the piston (3) is sliding with the hydraulic cylinder (2) and is sealingly connected by two first sealing rings (19), and the inner circumference of the piston (3) is sliding with the sealing shaft (4) and is sealingly connected by two second sealing rings (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210945575.5A CN117571223A (en) | 2022-08-08 | 2022-08-08 | Full-closed wellhead tightness inspection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210945575.5A CN117571223A (en) | 2022-08-08 | 2022-08-08 | Full-closed wellhead tightness inspection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117571223A true CN117571223A (en) | 2024-02-20 |
Family
ID=89885011
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210945575.5A Pending CN117571223A (en) | 2022-08-08 | 2022-08-08 | Full-closed wellhead tightness inspection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117571223A (en) |
-
2022
- 2022-08-08 CN CN202210945575.5A patent/CN117571223A/en active Pending
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