CN106812519B - Testing device for downhole tool and testing system for downhole tool - Google Patents
Testing device for downhole tool and testing system for downhole tool Download PDFInfo
- Publication number
- CN106812519B CN106812519B CN201611232571.3A CN201611232571A CN106812519B CN 106812519 B CN106812519 B CN 106812519B CN 201611232571 A CN201611232571 A CN 201611232571A CN 106812519 B CN106812519 B CN 106812519B
- Authority
- CN
- China
- Prior art keywords
- downhole tool
- sealing
- central rod
- testing device
- outer tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
- E21B47/00—Survey of boreholes or wells
-
- 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
- E21B33/10—Sealing or packing boreholes or wells in the borehole
Abstract
The invention discloses a testing device for a downhole tool and a testing system for the downhole tool, wherein the testing device for the downhole tool comprises an external mechanism and a central rod; the central rod penetrates through the external mechanism and can move in the vertical direction relative to the external mechanism; the well core rod with be formed with first cavity between the exterior mechanism, the exterior mechanism be provided with the first opening of first cavity intercommunication, well core rod is provided with the second cavity, the upper portion of second cavity is sealed, the lower part of well core rod's second cavity is opened, well core rod's lower part is used for being connected with downhole tool, be provided with on the well core rod with the second opening of first cavity with the second cavity intercommunication. By adopting the structure, the underground tool can be tested under more underground conditions.
Description
Technical Field
The invention relates to the field of oil and gas field exploitation, in particular to a testing device for an underground tool and a testing system for the underground tool.
Background
In the field of oil production, particularly in the process of thick oil exploitation, a high-temperature-resistant downhole tool is indispensable in steam huff and puff, steam flooding, SAGD, in-situ combustion and steam injection auxiliary thermal recovery matching process technologies, and the quality of the high-temperature-resistant downhole tool directly influences success or failure of thick oil development process measures. In recent years, the number of types of downhole tools used in various oil fields has increased, and the demand for the downhole tools is becoming higher and higher.
The medium heating and circulating system of the existing indoor high-temperature simulation test system is generally in rigid fixed connection with a well body of a test well, and cannot meet the requirement of a downhole tool high-temperature simulation test with lifting and lowering actions. Therefore, upgrading and modification are inevitable on the basis of the current test conditions.
In order to meet the requirement of the high-temperature simulation test of the downhole tool with the lifting and lowering actions, Chinese patent ZL201220740708.7 entitled "wellhead device for testing the downhole tool of the oil field" discloses a test device, but the device is not suitable for the action test of the downhole tool.
Disclosure of Invention
The present invention has an object to provide a testing apparatus for a downhole tool and a testing system for a downhole tool, which can test the downhole tool under more downhole conditions.
The embodiment of the application discloses a testing device for a downhole tool, which comprises an external mechanism and a central rod; the central rod penetrates through the external mechanism and can move in the vertical direction relative to the external mechanism; the well core rod with be formed with first cavity between the exterior mechanism, the exterior mechanism be provided with the first opening of first cavity intercommunication, well core rod is provided with the second cavity, the upper portion of second cavity is sealed, the lower part of well core rod's second cavity is opened, well core rod's lower part is used for being connected with downhole tool, be provided with on the well core rod with the second opening of first cavity with the second cavity intercommunication.
Preferably, the testing device for a downhole tool comprises a first sealing unit disposed between the central rod and the external means, the first sealing unit being located above the first chamber and being for sealing the first chamber.
Preferably, the testing device for a downhole tool comprises a second sealing unit arranged between the central rod and the external means, the second sealing unit being located below the first chamber and being adapted to seal the first chamber.
Preferably, the external mechanism includes an outer tube having a first stepped portion extending toward the center rod at an upper portion thereof, and the first sealing unit includes a first sealing portion provided between the first stepped portion and the center rod.
Preferably, the first sealing portion is a perfluoroether rubber ring.
Preferably, the first sealing unit includes a second sealing portion disposed between the outer tube and the center rod, and the second sealing portion is pressed against an upper end surface of the first stepped portion.
Preferably, the testing device for the downhole tool comprises a first compression ring sleeved between the central rod and the outer pipe, and the lower part of the first compression ring abuts against the second sealing part.
Preferably, the outer wall of the second sealing portion is located outside the outer wall of the first sealing portion.
Preferably, the second sealing portion is a graphite fiber sealing ring.
Preferably, the second sealing portion has a rectangular cross-section.
Preferably, the testing device for the downhole tool comprises a first sealing mechanism, the first sealing mechanism is sleeved on the central rod and fixed with the outer tube, a first space is formed between the first sealing mechanism and the central rod and between the upper ends of the outer tube, the outer tube is provided with a first flow channel, one end of the first flow channel is communicated with the first space, and the other end of the first flow channel is communicated with the first liquid collecting tube.
Preferably, the first flow channel is L-shaped, an upper port of the first flow channel is communicated with the first space, and a lower port of the first flow channel is located on the outer side wall of the outer tube and is communicated with the first liquid collecting tube.
Preferably, the external mechanism includes an outer tube having a lower portion with a second stepped portion extending toward the center rod, and the second sealing unit includes a third sealing portion provided between the second stepped portion and the center rod.
Preferably, the third sealing portion is a perfluoroether rubber ring.
Preferably, the second sealing unit includes a fourth sealing portion disposed between the outer tube and the center rod, and the fourth sealing portion is pressed against a lower end surface of the second stepped portion.
Preferably, the testing device for the downhole tool comprises a second compression ring sleeved outside the central rod, and the upper part of the second compression ring abuts against the lower end face of the fourth sealing part.
Preferably, the outer wall of the fourth sealing portion is located outside the outer wall of the third sealing portion.
Preferably, the fourth sealing portion is a graphite fiber sealing ring.
Preferably, the fourth sealing portion has a rectangular cross-section.
Preferably, the external mechanism includes outer tube, flange seat and second sealing mechanism, the second sealing mechanism cover is established the lower tip of outer tube, the second sealing mechanism with the flange seat is connected, first cavity is formed the outer tube with between the well core rod, the flange seat cover is established outside the well core rod, the flange seat with be provided with the third sealing unit between the well core rod.
Preferably, the inner wall of the flange seat has a third stepped portion extending toward the center rod, and the third sealing unit includes a fifth sealing portion provided between the third stepped portion and the center rod.
Preferably, the fifth sealing portion is a perfluoroether rubber ring.
Preferably, the third sealing unit includes a sixth sealing portion disposed between the flange seat and the central rod, and the sixth sealing portion is pressed against an upper end surface of the third step portion.
Preferably, the third sealing unit includes a third compression ring which is pressed against the upper end surface of the sixth sealing portion and sleeved outside the central rod.
Preferably, a second space is formed among the flange seat, the central rod, the second sealing mechanism and the outer pipe, a second flow channel is formed in the flange seat and is L-shaped, an upper port of the second flow channel is located on the upper end face of the flange seat, and a lower port of the second flow channel is located on the outer side wall of the flange seat and is communicated with a second liquid collecting pipe.
Preferably, the testing device for the downhole tool comprises a connecting sleeve, and the connecting sleeve is respectively connected with the upper part of the central rod and the first sealing mechanism through threads.
The embodiment of the application discloses test system that downhole tool used, include as above-mentioned testing arrangement and oil pipe tubular column that downhole tool used, the upper end of oil pipe tubular column with well core rod connects, and with well core rod's second cavity intercommunication, the lower extreme of oil pipe tubular column is used for being connected with downhole tool.
Preferably, the testing system for the downhole tool comprises a circulation control device, the downhole tool and a test wellbore, and the second opening, the tubing string, the downhole tool, the test wellbore, the circulation control device and the first opening are communicated to form a circulation pipeline.
The structure is adopted, so that the downhole tool testing device is suitable for the downhole tool which can be operated in a large-range temperature field (0-350 ℃), and the downhole tool can be tested under more downhole conditions.
Drawings
FIG. 1 is a schematic diagram of a test rig for a downhole tool of the present application.
Fig. 2 is a partial schematic view of the upper half of fig. 1.
Fig. 3 is a partial schematic view of the lower half of fig. 1.
FIG. 4 is a schematic diagram of a test system for a downhole tool of the present application.
Reference numerals of the above figures:
1. a coupling; 2. connecting sleeves; 3. a first seal seat; 4. a first fastening sleeve; 5. a first clamp ring; 6. a second seal portion; 7. a first seal portion; 8. a circulation interface; 9. an outer tube; 10. a center pole; 11. a third seal portion; 12. a fourth seal portion; 13. a second clamp ring; 14. a second seal seat; 15. a connecting screw; 16. a snap ring; 17. a second fastening sleeve; 18. a third clamp ring; 19. a sixth seal portion; 20. a fifth seal portion; 21. a flange seat; 22. a first connector; 23. a first liquid collection pipe; 24. a second connector; 25. a second liquid collecting pipe; 26. an oil receiving cylinder; 27. a first chamber; 28. a second chamber; 29. a first opening; 30. a second opening; 31. a first step portion; 32. a second step portion; 33. a third step portion; 34. a first space; 35. a second space; 36. a circulation control device; 37. an oil pipe string; 38. a downhole tool; 39. testing a shaft; 40. a first flow passage; 41. a second flow passage.
Detailed Description
The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the invention easier to understand by those skilled in the art, and thus will clearly and clearly define the scope of the invention.
Referring to fig. 1, the present embodiment discloses a test rig for a downhole tool 38 comprising an outer mechanism and a central rod 10. The central rod 10 is inserted into the external mechanism. The central rod 10 is movable in a vertical direction with respect to the external means. A first chamber 27 is formed between the central rod 10 and the external means. The lower portion of the central rod 10 is adapted to be connected to a downhole tool 38. The lower part of the central rod 10 is provided with a second chamber 28 in which fluid flowing therein can act on a downhole tool 38. The external means are provided with a first opening 29 communicating with the first chamber 27. The central rod 10 is provided with a second opening 30 communicating the first chamber 27 with the second chamber 28.
In particular, the external means may comprise an external tube 9. The outer tube 9 extends in a vertical direction (i.e., the length direction of the paper in fig. 1). The central rod 10 is vertically movable with respect to the outer tube 9. A first substantially annular chamber 27 is formed between the outer side wall of the central rod 10 and the inner side wall of the outer tube 9. A first opening 29 is opened in the wall surface of the outer tube 9, and the first opening 29 communicates with the first chamber 27. Preferably, the first opening 29 can be provided with a circulation connection 8, which circulation connection 8 can be connected with other connections.
The central rod 10 may be provided with a second chamber 28. The second chamber 28 of the central rod 10 is sealed at the top. The second chamber 28 of the central rod 10 is open at the lower part. The wall surface of the center rod 10 is provided with a second through opening 30. The second opening 30 may communicate the first and second chambers 27, 28.
After entering the first chamber 27 from the first opening 29, the fluid enters the second chamber 28 from the second opening 30, flows from the lower part of the second chamber 28 to the downhole tool 38 and acts on the downhole tool 38. Accordingly, embodiments of the present application may control the temperature and pressure applied to the downhole tool 38 via the fluid, thereby simulating the operation of the downhole tool under various conditions.
Referring to FIG. 4, the second opening 30 may preferably be circulated through the tubing string 37, the downhole tool 38, the test wellbore 39, the circulation control device 36, and the first opening 29. The fluid circulates in the circulation line, thereby repeatedly heating the downhole tool 38 with the fluid.
When the fluid reaches a certain temperature and the downhole tool 38 needs to be lifted and lowered, the lifting device can be used for applying upper and lower loads to the center rod 10, and the lifting and lowering operation can be performed simultaneously with the circulation heating.
When the fluid reaches the seal test temperature, heating of the fluid may be stopped. The circulation control device 36 is disconnected from the test wellbore 39 and self-circulation is performed, and the downhole tool 38 is tested for sealing by the pumping system through the first opening 29 to the tubing string 37 and the test wellbore 39.
In the present embodiment, as shown in fig. 1 and 2, the testing device for the downhole tool 38 comprises a first sealing unit disposed between the central rod 10 and the external means, the first sealing unit being located above the first chamber 27 and sealing the first chamber 27 so that fluid does not escape from above the first chamber 27.
The upper part of the outer tube 9 has a first step 31 extending towards the central rod 10. The first sealing means may include a first sealing portion 7 disposed between the first stepped portion 31 and the center rod 10. In the present embodiment, the first seal portion 7 is a rubber ring. Specifically, the first seal portion 7 is an O-type perfluoroether rubber ring. The second sealing part 6 is a graphite fiber sealing ring with a rectangular cross section.
The first sealing portion 7 can ensure that the upper portion of the central rod 10 is sealed with the outer tube 9 under a relatively high pressure (for example, not greater than 5.0MPa) during the movement of the central rod 10 relative to the outer tube 9 within the preset pressure range.
The first sealing unit may further include a second sealing portion 6 disposed between the outer tube 9 and the center rod 10, and the second sealing portion 6 is pressed against an upper end surface of the first stepped portion 31. The outer wall of the second seal 6 is located outside the outer wall of the first seal 7. When the first seal portion 7 leaks, the second seal portion 6 can still ensure the seal between the central rod 10 and the outer tube 9.
The second sealing portion 6 ensures that the central rod 10 is sealed at a relatively high pressure (for example, not greater than 26.0MPa) between the upper portion of the central rod 10 and the outer tube 9 during a period in which the central rod 10 is stationary relative to the outer tube 9.
Preferably, the testing device for the downhole tool 38 includes a first compression ring 5, the first compression ring 5 is sleeved outside the central rod 10, an outer wall of the first compression ring 5 is in threaded connection with an inner wall of the upper end of the outer tube 9, and a lower portion of the first compression ring 5 abuts against the second sealing portion 6. The first compression ring 5 can press the second sealing portion 6 against the first step portion 31, so as to seal the central rod 10 and the outer tube 9 as much as possible.
More preferably, the test device for the downhole tool 38 comprises a first sealing means, which is fitted over the central rod 10 and fixed to the upper end of the outer tube 9. Specifically, in the present embodiment, the first sealing mechanism includes a first fastening sleeve 4 and a first sealing seat 3, which are sleeved on the outside of the central rod 10. The first sealing seat 3 is arranged through the first fastening sleeve 4. The first fastening sleeve 4 is fixedly arranged at the upper end of the outer pipe 9 through threads, so that the lower end part of the first sealing seat 3 can be abutted against the upper end part fluorine rubber ring of the outer pipe 9. Preferably, a fluorine rubber ring is arranged between the first sealing seat 3 and the central rod 10.
A first space 34 is formed between the first sealing mechanism and the center rod 10 and between the first sealing mechanism and the outer tube 9, a first flow channel 40 is formed in the upper portion of the outer tube 9, one end of the first flow channel 40 is communicated with the first space 34, and the other end of the first flow channel 40 is communicated with the first liquid collecting tube 23.
Preferably, the first flow channel 40 is L-shaped, an upper port of the first flow channel 40 is communicated with the first space 34, and a lower port of the first flow channel 40 is located on an outer side wall of an upper end of the outer tube 9 and is communicated with the first header 23.
When the first sealing unit fails, fluid may enter the first space 34, enter the upper port of the first flow passage 40, and overflow from the lower port of the first flow passage 40 into the first header 23. When a certain amount of fluid remaining or flowing in the first header 23 is observed, it is found that the first sealing unit is failed. The sealing performance of the test device can then be improved by adjusting the pressure of the first compression ring 5 against the second seal 6.
As shown in connection with fig. 1 and 3, the test device for the downhole tool 38 comprises a second sealing unit arranged between the central rod 10 and the external means, the second sealing unit being located below the first chamber 27 and being adapted to seal the first chamber 27 such that fluid does not escape from below the first chamber 27.
The lower portion of the outer tube 9 has a second stepped portion 32 extending toward the center rod 10, and the second sealing unit may include a third sealing portion 11 disposed between the second stepped portion 32 and the center rod 10. The third sealing part 11 is a perfluoroether rubber ring. The third sealing portion 11 can ensure that the central rod 10 is sealed under a higher pressure (for example, not greater than 5.0MPa) between the middle portion of the central rod 10 and the outer tube 9 during the movement of the central rod 10 relative to the outer tube 9 within the preset pressure range.
The second sealing unit may include a fourth sealing portion 12 disposed between the outer tube 9 and the center rod 10, and the fourth sealing portion 12 is pressed against a lower end surface of the second stepped portion 32.
The testing device for the downhole tool 38 comprises a second compression ring 13 sleeved outside the central rod 10, wherein the outer wall of the second compression ring 13 is in threaded connection with the inner wall of the lower end of the outer pipe 9. The second compression ring 13 may press the fourth sealing portion 12 against the second stepped portion 32 to try to seal both the central rod 10 and the outer tube 9.
The outer wall of the fourth sealing portion 12 is located outside the outer wall of the third sealing portion 11. The fourth sealing portion 12 is a graphite fiber sealing ring with a rectangular cross section. When the third seal 11 leaks, the fourth seal 12 may still ensure the seal between the central rod 10 and the outer tube 9.
The fourth sealing portion 12 ensures that the central rod 10 is sealed at a higher pressure (for example, not greater than 26.0MPa) between the middle of the central rod 10 and the outer tube 9 during a period in which the central rod 10 is stationary relative to the outer tube 9.
With reference to fig. 1 and 3, the external mechanism includes an outer tube 9, a flange seat 21 and a second sealing mechanism, the second sealing mechanism is disposed at the lower end of the outer tube 9, the second sealing mechanism is connected to the flange seat 21, the first cavity 27 is formed between the outer tube 9 and the central rod 10, the flange seat 21 is disposed outside the central rod 10, and a third sealing unit is disposed between the flange seat 21 and the central rod 10.
When the second or third sealing unit fails and fluid enters the second space, the second sealing mechanism can enable the fluid to enter the second liquid collecting pipe, and the fluid is not splashed around. Specifically, in the present embodiment, the second sealing mechanism includes a second fastening sleeve 17 and a second sealing seat 14, which are sleeved outside the outer tube 9. The second sealing seat 14 is sleeved on the outer wall of the lower end of the outer pipe 9. The second sealing seat 14 is arranged on the second fastening sleeve 17 in a penetrating manner. The second fastening sleeve 17 is fixed to the flange seat 21 by a screw. The lower end of the outer pipe 9 is fixedly connected with the upper end surface of the flange seat 21 through a connecting screw 15 and a clamping ring 16.
The inner wall of the flange seat 21 has a third step 33 extending toward the center rod 10, and the third sealing unit includes a fifth sealing portion 20 provided between the third step 33 and the center rod 10. The fifth seal portion 20 is a perfluoroether rubber ring. The fifth sealing portion 20 ensures that the sealing between the lower portion of the central rod 10 and the flange seat 21 is ensured under a relatively high pressure (for example, not greater than 5.0MPa) during the movement of the central rod 10 relative to the outer tube 9 within the preset pressure range.
The third sealing unit may include a sixth sealing portion 19 disposed between the flange seat 21 and the center rod 10, and the sixth sealing portion 19 is pressed against an upper end surface of the third stepped portion 33. The sixth sealing portion 19 ensures that the central rod 10, during a relative rest with respect to the outer tube 9, ensures sealing between the lower portion of the central rod 10 and the flange seat 21 at a relatively high pressure (for example, not greater than 26.0 MPa). When the fifth sealing portion 20 leaks, the sixth sealing portion 19 may still ensure the sealing between the central rod 10 and the flange seat 21. The testing device for the downhole tool 38 comprises a third pressing ring 18 which is pressed against the upper end face of the third step part 33, and the outer wall of the third pressing ring is in threaded connection with the inner wall of the upper end of the flange seat 21. The third clamp ring 18 may press the sixth sealing portion 19 against the third step portion 33, so as to seal the central rod 10 and the flange seat 21 as much as possible.
A second space 35 is formed between the upper end of the flange seat 21, the lower end of the outer tube 9, the central rod 10 and the second sealing mechanism, a second flow channel 41 is formed on the flange seat 21, the second flow channel 41 is L-shaped, the upper port of the second flow channel 41 is located on the upper end face of the flange seat 21, and the lower port of the second flow channel 41 is located on the outer side wall of the flange seat 21 and is communicated with the second liquid collecting tube 25. When the second sealing unit or the third sealing unit fails, fluid may enter the second space 35, enter one end of the second flow channel 41, and overflow from the other end of the first flow channel 40 into the second header pipe 25. When a certain amount of fluid remaining or flowing in the second header pipe 25 is observed, it is found that the second sealing or the third sealing unit is failed. The abutment force of the second clamping ring 13 or the third clamping ring 18 against the third seal 11 or the sixth seal 19 can then be adjusted by means of the second sealing mechanism.
The test rig for the downhole tool 38 of the present application is generally installed as follows: the lower end of the outer pipe 9 is seated on the upper end face of the flange seat 21, a clamping ring 16 is clamped into a clamping groove at the outer edge of the lower end of the outer pipe 9, the clamping ring 16 is fixed with a circumferential screw hole on the upper end face of the flange seat 21 by a connecting screw 15, then a second sealing seat 14 is seated on an O-shaped fluorine rubber ring on the upper end face of the flange seat 21, and then an inner wall screw thread of a second fastening sleeve 17 is fixedly connected with an outer wall screw thread on the upper end of the flange seat 21; the central rod 10 is inserted into the outer pipe 9 and the flange seat 21 from top to bottom, and then the lower end screw thread of the inner wall of the connecting sleeve 2 is connected with the upper end screw thread of the outer wall of the first sealing seat 3, wherein the connecting sleeve 2 is used for preventing the central rod 10 from being drawn out from the connecting body of the outer pipe 9 and the flange seat 21 and facilitating the rotation and up-and-down movement of the central rod 10 during application and hoisting. The first liquid collecting pipe 23 is connected to the L-shaped round hole formed in the upper end face of the outer pipe 9 and communicated with the outer wall of the outer pipe through the first connector 22 in a threaded mode, the second liquid collecting pipe 25 is connected to the L-shaped round hole formed in the upper end face of the flange seat 21 and communicated with the outer wall of the flange seat through the second connector 24 in a threaded mode, and an oil receiving cylinder 26 is placed below the outlets of the two liquid collecting pipes.
When fluid inflow of the oil receiving cylinder 26 is observed, the operation of the test system is stopped, a leak point is determined, the first fastening sleeve 4 or the second fastening sleeve 17 is unscrewed, the first sealing seat 3 and the second sealing seat 14 are respectively pushed upwards, the first compression ring 5, the second compression ring 13 and the third compression ring 18 are exposed, and the compression force of the first compression ring 5, the second compression ring 13 and the third compression ring 18 is readjusted.
The testing device for the downhole tool 38 comprises a connecting sleeve 2, wherein the connecting sleeve 2 is respectively connected with the upper part of the central rod and the first sealing mechanism through threads. A coupling 1 is arranged between the connecting sleeve 2 and the central rod 10. In the process of hoisting the test device on the high-temperature simulation test wellhead, in order to prevent the central rod 10 from being drawn out of the connecting body of the outer pipe 9 and the flange seat 21, the connecting sleeve 2 can be utilized to connect the central rod 10 with the first sealing seat 3 in a common thread form. In normal test operation, the connecting sleeve 2 is rotated upwards when the central rod 10 moves up and down, so that the connecting sleeve 2 is separated from the first sealing seat 3.
When the testing device for the downhole tool 38 in the embodiment of the present application is applied, the specific working process is as follows:
connecting a downhole tool 38 and an oil pipe string 37 which are prepared for a high-temperature simulation test and have lifting and lowering actions with a central rod 10 in a test device for completing the assembly, hoisting the downhole tool 38 and the oil pipe string 37 by using a hoisting tool, putting the downhole tool 38 and the oil pipe string 37 into a high-temperature simulation test well, and simultaneously putting a flange seat 21 on a wellhead flange and fixing the flange seat by using a wellhead bolt; and then the circulating interface 8 is fixedly connected with a circulating pipeline of the medium circulating system of the high-temperature simulation test well by a clamp.
Starting medium circulation heating of the high-temperature simulation test well, the medium circulation path sequentially flows from an outside-well circulation system to the outside-well circulation system through the circulation interface 8, the first cavity 27 between the outer pipe 9 and the central rod 10, the second opening 30 of the central rod 10, the second cavity 28, the oil pipe string 37, the downhole tool 38 and the test well shaft 39.
When the circulating medium reaches a certain temperature and the downhole tool 38 needs to be lifted and lowered, the connecting sleeve 2 is rotated upwards to be separated from the first sealing seat 3, the lifting frame connected with the coupling 1 is used for applying up-and-down loads to the center rod 10, and the lifting and lowering actions and the medium circulating heating can be simultaneously carried out.
When the circulating medium reaches the sealing test temperature, the medium heating is stopped, a valve between the out-of-well circulating system and the test well is closed to realize the self circulation of the heating furnace, and the sealing test is directly carried out on the downhole tool 38 by the pressurizing system through the circulating interface 8, the first cavity 27 formed between the outer pipe 9 and the central rod 10, the second cavity 28 of the central rod 10, the oil pipe column 37 or the pressurizing system through the test wellbore 39.
In the process of carrying out the sealing test, if a medium flows into the oil receiving cylinder 26 from the first header pipe 23 or the second header pipe 25, the pressing is stopped, the first fastening sleeve 44 or the second fastening sleeve 17 with the medium flowing out of the vicinity of the header pipe is unscrewed, the first seal seat 3 or the second seal seat 14 is respectively pushed upwards, the first clamp ring 5, the second clamp ring 13 or the third clamp ring 18 is exposed, the pressing force of the first clamp ring 5, the second clamp ring 13 or the third clamp ring 18 is readjusted, then the components are reset again, and the pressing sealing test is continued.
And after the sealing test is finished, stopping pressurizing, waiting for the cooling of the medium in the test system, and opening all valves at a certain temperature to allow the medium to completely flow back to the oil storage tank.
When the test device for the test shaft 39 and the downhole tool 38 is recovered to normal temperature, the lifting frame is moved away, the connecting sleeve 2 is rotated downwards to be connected with the first sealing seat 3, the wellhead bolt is disassembled, and the test device, the oil pipe column 37 and the downhole tool 38 are lifted out of the test shaft 39 by using a lifting tool.
Referring to fig. 4, the present embodiment discloses a testing system for a downhole tool 38, comprising a testing device for a downhole tool 38 as described above and a tubing string 37, the tubing string 37 being connected at its upper end to the central rod 10 and communicating with the second chamber 28 of the central rod 10, and the tubing string 37 being connected at its lower end to the downhole tool 38.
Preferably, the second opening 30 may be circulated through the tubing string 37, the downhole tool 38, the test wellbore 39, the circulation control device 36, and the first opening 29.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (28)
1. A test rig for a downhole tool comprising an external mechanism and a central rod; the central rod penetrates through the external mechanism and can move in the vertical direction relative to the external mechanism; the underground tool is characterized in that a first cavity is formed between the central rod and the external mechanism, the external mechanism is provided with a first opening communicated with the first cavity, the central rod is provided with a second cavity, the upper portion of the second cavity is sealed, the lower portion of the second cavity of the central rod is open, the lower portion of the central rod is used for being connected with an underground tool, and the central rod is provided with a second opening communicated with the first cavity and the second cavity.
2. The testing device for a downhole tool according to claim 1, comprising a first sealing unit arranged between the central rod and the external means, the first sealing unit being located above the first chamber and sealing the first chamber.
3. The testing device for a downhole tool according to claim 1, comprising a second sealing unit arranged between the central rod and the external means, the second sealing unit being located below the first chamber and sealing the first chamber.
4. The trial for a downhole tool of claim 2, wherein the external mechanism comprises an outer tube having an upper portion with a first step extending toward the central rod, the first sealing unit comprising a first sealing portion disposed between the first step and the central rod.
5. The downhole tool testing device of claim 4, wherein the first seal is a perfluoroether rubber ring.
6. The testing device for a downhole tool according to claim 4, wherein the first sealing unit comprises a second sealing portion provided between the outer tube and the central rod, the second sealing portion being pressed against an upper end surface of the first step portion.
7. The downhole tool testing device of claim 6, comprising a first compression ring disposed between the central rod and the outer tube, a lower portion of the first compression ring abutting the second sealing portion.
8. The trial of claim 7 wherein the outer wall of the second seal is positioned outside the outer wall of the first seal.
9. A test rig for a downhole tool according to claim 6, wherein the second sealing portion is a graphite fibre sealing ring.
10. A test rig for a downhole tool according to claim 6, wherein the second sealing portion is rectangular in cross-section.
11. The testing device of claim 7, wherein the testing device comprises a first sealing mechanism, the first sealing mechanism is sleeved on the central rod and fixed with the outer tube, a first space is formed among the first sealing mechanism, the central rod and the upper end of the outer tube, the outer tube is provided with a first flow passage, one end of the first flow passage is communicated with the first space, and the other end of the first flow passage is communicated with a first liquid collecting tube.
12. The testing device for a downhole tool according to claim 11, wherein the first flow passage is L-shaped, an upper port of the first flow passage communicates with the first space, and a lower port of the first flow passage is located on an outer side wall of the outer tube and communicates with the first header pipe.
13. A test rig for a downhole tool according to claim 3, wherein the external means comprises an outer tube having a lower portion with a second step extending towards the central rod, the second sealing unit comprising a third sealing portion arranged between the second step and the central rod.
14. The downhole tool testing device of claim 13, wherein the third seal is a perfluoroether rubber ring.
15. The testing device for a downhole tool according to claim 13, wherein the second sealing unit comprises a fourth sealing portion provided between the outer tube and the central rod, the fourth sealing portion being pressed against a lower end surface of the second step portion.
16. The downhole tool testing device of claim 15, comprising a second compression ring disposed about the central rod, an upper portion of the second compression ring abutting a lower end surface of the fourth sealing portion.
17. A test rig for a downhole tool according to claim 16, wherein the outer wall of the fourth seal is located outside the outer wall of the third seal.
18. A test rig for a downhole tool according to claim 15, wherein the fourth sealing portion is a graphite fibre sealing ring.
19. A test rig for a downhole tool according to claim 15, wherein the fourth seal is rectangular in cross-section.
20. The testing device for the downhole tool according to claim 1, wherein the external mechanism comprises an outer tube, a flange seat, and a second sealing mechanism, the second sealing mechanism is sleeved on a lower end portion of the outer tube, the second sealing mechanism is connected with the flange seat, the first chamber is formed between the outer tube and the central rod, the flange seat is sleeved outside the central rod, and a third sealing unit is arranged between the flange seat and the central rod.
21. The trial of claim 20 wherein the inner wall of the flange seat has a third step extending towards the central stem, the third seal unit comprising a fifth seal disposed between the third step and the central stem.
22. The downhole tool testing device of claim 21, wherein the fifth seal is a perfluoroether rubber ring.
23. The testing device for a downhole tool according to claim 21, wherein the third sealing unit comprises a sixth sealing portion provided between the flange seat and the central rod, the sixth sealing portion being pressed against an upper end surface of the third step portion.
24. The testing device for a downhole tool according to claim 23, wherein the third sealing unit comprises a third compression ring pressed against the upper end surface of the sixth sealing portion and sleeved on the center rod.
25. The testing device of claim 23, wherein a second space is formed between the flange seat, the central rod, the second sealing mechanism and the outer tube, a second flow channel is formed in the flange seat, the second flow channel is L-shaped, an upper port of the second flow channel is located on an upper end face of the flange seat, and a lower port of the second flow channel is located on an outer side wall of the flange seat and is communicated with a second liquid collecting tube.
26. A testing device for a downhole tool according to claim 11, comprising a nipple threadedly connected to an upper part of the central rod and the first sealing means, respectively.
27. A testing system for a downhole tool, comprising a testing device for a downhole tool according to any of claims 1-26 and a tubing string connected at an upper end to the central rod and communicating with the second chamber of the central rod, the tubing string being adapted at a lower end for connection to a downhole tool.
28. The system of claim 27, wherein the testing system comprises a circulation control device, a downhole tool, a test wellbore, and wherein the second opening, the tubing string, the downhole tool, the test wellbore, the circulation control device, and the first opening communicate to form a circulation circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611232571.3A CN106812519B (en) | 2016-12-28 | 2016-12-28 | Testing device for downhole tool and testing system for downhole tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611232571.3A CN106812519B (en) | 2016-12-28 | 2016-12-28 | Testing device for downhole tool and testing system for downhole tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106812519A CN106812519A (en) | 2017-06-09 |
| CN106812519B true CN106812519B (en) | 2020-01-07 |
Family
ID=59110359
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611232571.3A Active CN106812519B (en) | 2016-12-28 | 2016-12-28 | Testing device for downhole tool and testing system for downhole tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106812519B (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE68929202T2 (en) * | 1988-09-23 | 2001-01-04 | Schlumberger Ltd | Borehole tool for determining rock properties |
| CN1321876A (en) * | 2000-04-30 | 2001-11-14 | 胜利石油管理局采油工艺研究院 | Downhole tool performance testing device |
| CN202417474U (en) * | 2012-01-10 | 2012-09-05 | 中国石油天然气股份有限公司 | Composite simulation test oil well |
| CN204113183U (en) * | 2014-09-23 | 2015-01-21 | 甘肃蓝科石化高新装备股份有限公司 | A kind of sealing device of high temperature resistant compression test under super high pit shaft |
| CN104481447A (en) * | 2014-12-10 | 2015-04-01 | 陕西创源石油科技有限公司 | Quantitative water injection and pressure measuring composite stopper |
| CN204255623U (en) * | 2014-11-14 | 2015-04-08 | 中国石油天然气股份有限公司 | A kind of subsurface tool dynamic performance experiment pick-up unit |
| CN104819858A (en) * | 2015-04-16 | 2015-08-05 | 西南石油大学 | Test device for evaluating reliability of downhole tool of horizontal well |
| CN105003254A (en) * | 2015-08-05 | 2015-10-28 | 中国海洋石油总公司 | High-temperature high-pressure pit shaft annular sealed space temperature and pressure change simulation experiment device |
| CN105004484A (en) * | 2015-06-24 | 2015-10-28 | 上海大学 | High-temperature and high-pressure testing device for underground packer |
| CN205157173U (en) * | 2015-10-28 | 2016-04-13 | 中威联合国际能源服务有限公司 | Downhole tool performance testing device |
| CN205785786U (en) * | 2016-05-31 | 2016-12-07 | 中国石油天然气股份有限公司 | A kind of packer performance detection device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9638005B2 (en) * | 2013-06-12 | 2017-05-02 | Exxonmobil Upstream Research Company | Combined anti-rotation apparatus and pressure test tool |
-
2016
- 2016-12-28 CN CN201611232571.3A patent/CN106812519B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE68929202T2 (en) * | 1988-09-23 | 2001-01-04 | Schlumberger Ltd | Borehole tool for determining rock properties |
| CN1321876A (en) * | 2000-04-30 | 2001-11-14 | 胜利石油管理局采油工艺研究院 | Downhole tool performance testing device |
| CN202417474U (en) * | 2012-01-10 | 2012-09-05 | 中国石油天然气股份有限公司 | Composite simulation test oil well |
| CN204113183U (en) * | 2014-09-23 | 2015-01-21 | 甘肃蓝科石化高新装备股份有限公司 | A kind of sealing device of high temperature resistant compression test under super high pit shaft |
| CN204255623U (en) * | 2014-11-14 | 2015-04-08 | 中国石油天然气股份有限公司 | A kind of subsurface tool dynamic performance experiment pick-up unit |
| CN104481447A (en) * | 2014-12-10 | 2015-04-01 | 陕西创源石油科技有限公司 | Quantitative water injection and pressure measuring composite stopper |
| CN104819858A (en) * | 2015-04-16 | 2015-08-05 | 西南石油大学 | Test device for evaluating reliability of downhole tool of horizontal well |
| CN105004484A (en) * | 2015-06-24 | 2015-10-28 | 上海大学 | High-temperature and high-pressure testing device for underground packer |
| CN105003254A (en) * | 2015-08-05 | 2015-10-28 | 中国海洋石油总公司 | High-temperature high-pressure pit shaft annular sealed space temperature and pressure change simulation experiment device |
| CN205157173U (en) * | 2015-10-28 | 2016-04-13 | 中威联合国际能源服务有限公司 | Downhole tool performance testing device |
| CN205785786U (en) * | 2016-05-31 | 2016-12-07 | 中国石油天然气股份有限公司 | A kind of packer performance detection device |
Non-Patent Citations (2)
| Title |
|---|
| 井下工具模拟试验系统;何传兴;《化工管理》;20161231;第214页 * |
| 井下工具高温试验井系统;王东等;《石油矿场机械》;20090731;第38卷(第7期);第75-79页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106812519A (en) | 2017-06-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| NO320102B1 (en) | Electric water connection connector | |
| CN113494273A (en) | Well completion pipe string and production pipe string of electric pump oil production well and construction method of well completion pipe string and production pipe string | |
| NO335732B1 (en) | Production pipe hanger with annular space passage with hydraulically actuated plug valve | |
| CN203822259U (en) | Safety control tool for oil pipe of thermal production well | |
| CN206693997U (en) | A kind of oil field is every excavating technology tubing string | |
| CN111878069A (en) | Composite continuous pipe cable oil-water well casing leakage finding system and method | |
| CN205638338U (en) | Hourglass packer is looked for to sleeve pipe | |
| CN106812519B (en) | Testing device for downhole tool and testing system for downhole tool | |
| CN112302563A (en) | Ultrashort-clamping-distance water injection sand prevention packer and operation method thereof | |
| US11965389B2 (en) | Patching construction method using a hydraulic variable-grade expansion tool for blocking during drilling | |
| CN103697009A (en) | Hydraulic jumper and testing and installing methods thereof | |
| WO2020145841A1 (en) | Insert safety valve (variants) | |
| RU128896U1 (en) | DEVICE FOR TRANSFER OF WELLS, INCLUDING WATERFILLED, TO OPERATION ON TWO LIFT COLUMNS | |
| CN108240198B (en) | Pump-passing well-flushing device for oil pump | |
| CN203189249U (en) | Tubing oil pump capable of achieving tool seat sealing under pump | |
| CN109779547B (en) | Downhole liquid flow reversing tool | |
| CN111827983A (en) | Water exploration method and device for casing completion horizontal well | |
| CN211851686U (en) | Find stifled water production pipe | |
| CN201635703U (en) | Sleeve pipe pressure test plugging device | |
| CN209228335U (en) | A kind of electric submersible pump packer | |
| CN109538194B (en) | Coiled tubing underground quick leakage finding process pipe column and using method | |
| CN219733310U (en) | Hydraulic control joint for production pipe column | |
| CN202093189U (en) | Fast connecting device for fluid | |
| CN203362114U (en) | Down hole differential pressure type openable and closeable circulating valve | |
| CN203594401U (en) | Sleeve packer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |