CN115199219A - Seal checking joint and oil pipe seal checking method - Google Patents
Seal checking joint and oil pipe seal checking method Download PDFInfo
- Publication number
- CN115199219A CN115199219A CN202110391212.7A CN202110391212A CN115199219A CN 115199219 A CN115199219 A CN 115199219A CN 202110391212 A CN202110391212 A CN 202110391212A CN 115199219 A CN115199219 A CN 115199219A
- Authority
- CN
- China
- Prior art keywords
- oil pipe
- seal
- joint
- cavity
- sealed
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 42
- 238000012360 testing method Methods 0.000 claims abstract description 57
- 238000007689 inspection Methods 0.000 claims abstract description 22
- 239000012530 fluid Substances 0.000 claims description 65
- 230000000903 blocking effect Effects 0.000 claims description 49
- 238000007789 sealing Methods 0.000 claims description 47
- 238000004519 manufacturing process Methods 0.000 claims description 25
- 238000012795 verification Methods 0.000 claims description 12
- 230000009471 action Effects 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 3
- 238000005086 pumping Methods 0.000 abstract description 26
- 230000008569 process Effects 0.000 description 10
- 239000007788 liquid Substances 0.000 description 8
- 239000007789 gas Substances 0.000 description 6
- 230000009467 reduction Effects 0.000 description 6
- 230000008859 change Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 210000002445 nipple Anatomy 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002343 natural gas well Substances 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/02—Valve arrangements for boreholes or wells in well heads
-
- 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
- G01M3/28—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 for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2807—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 for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes
- G01M3/2815—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 for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes using pressure measurements
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention provides a seal checking joint and an oil pipe seal checking method. The seal checking joint comprises: the connector body is provided with a flow passing cavity, an inlet communicated with the flow passing cavity and an outlet communicated with the flow passing cavity; the first thread section is connected with the joint body, the first thread section is arranged on the outer wall surface of the joint body and is positioned at one end where the outlet is located, and the joint body is connected with the part to be checked through the first thread section; the first operation portion is arranged on the connector body, and the connector body can be installed to the part to be verified by screwing the first operation portion. The technical scheme of the invention can smoothly carry out pressure test and seal inspection on the oil pipe of the pumping well.
Description
Technical Field
The invention relates to the technical field of seal inspection, in particular to a seal inspection joint and an oil pipe seal inspection method.
Background
In the mechanical oil extraction process of the oil pumping well, the oil pipe is easy to damage due to friction between the sucker rod string and the oil pipe or due to corrosion of the oil pipe by gas and liquid in the well. The method for verifying the oil pipe sealing at present is to squeeze liquid into an oil pipe through a wellhead nozzle sleeve by using a pump truck for pressurizing, the pump is stopped to observe the pressure reduction condition in the oil pipe after the pressure is required to be pressurized to 5-8 MPa under normal conditions, if the pressure is reduced quickly, the oil pipe sealing is not tight, a leakage breaking point exists, and if the pressure is not reduced quickly, the oil pipe sealing is tight. The production valve and the back-pressure valve are both connected with the wellhead choke sleeve in a sealing mode, in the process, the pressure in the cavity of the wellhead choke sleeve and the pressure at the back-pressure valve are the same as the pressure in the oil pipe, and the pressure bearing of the back-pressure valve is generally below 2.5 MPa. Therefore, when the oil pipe of the pumping well is subjected to pressure test and seal check by the method, the problem that the pressure borne by the back pressure valve exceeds the working pressure of the back pressure valve in the pressure test and seal check process of the oil pipe of the pumping well can occur due to the lower pressure bearing capacity of the back pressure valve. Therefore, how to smoothly carry out pressure test and seal inspection on the oil pipe of the pumping well is a problem which needs to be solved urgently.
Disclosure of Invention
The invention mainly aims to provide a seal checking joint and an oil pipe seal checking method, which can smoothly carry out pressure test and seal checking on an oil pipe of a pumping well.
To achieve the above object, according to one aspect of the present invention, there is provided a seal inspection connector comprising: the connector body is provided with a flow passing cavity, an inlet communicated with the flow passing cavity and an outlet communicated with the flow passing cavity; the first thread section is connected with the joint body, the first thread section is arranged on the outer wall surface of the joint body and is positioned at one end where the outlet is located, and the joint body is connected with the part to be checked through the first thread section; the first operation portion is arranged on the connector body, and the connector body can be installed to the part to be verified by screwing the first operation portion.
Furthermore, the seal checking connector further comprises a second thread section arranged on the inner wall surface of the overflowing cavity, the second thread section is located at one end where the inlet is located, and the connector body is connected with the fluid conveying equipment through the second thread section.
Further, the first operating portion is located between the first thread section and the second thread section.
Further, the seal checking connector further comprises a sealing structure connected with the connector body, the sealing structure is movably arranged relative to the connector body, and the sealing structure is used for sealing a gap between the connector body and a component to be checked.
Further, the plugging structure comprises a plugging body arranged on the periphery of the connector body, internal threads are arranged on at least part of the inner wall surface of the plugging body, external threads matched with the internal threads are arranged on at least part of the outer wall surface of the connector body, and the plugging body is in threaded fit with the connector body.
Furthermore, the plugging structure also comprises a third thread section connected with the plugging body, the third thread section is arranged on at least part of the outer wall surface of the plugging body, and the plugging body is in threaded connection with the component to be verified through the third thread section; or the blocking structure also comprises a stop piece connected with the blocking body; or the plugging structure further comprises a second operation part connected with the plugging body, and under the action of external force, the second operation part drives the plugging body to move relative to the joint body; or the plugging structure further comprises a third threaded section, a stop piece and a second operating part, and the second operating part, the stop piece and the third threaded section are sequentially arranged on the plugging body in the fluid flowing direction.
Furthermore, the seal checking joint also comprises a sealing structure arranged on the first thread section, and the sealing structure is used for sealing the connection part between the first thread section and the part to be checked; or the first operation part comprises an operation block arranged on at least part of the outer wall surface of the joint body, and the operation block is provided with at least two outer wall surfaces arranged at an included angle.
According to another aspect of the invention, an oil pipe seal inspection method is provided, the oil pipe seal inspection method adopts the seal inspection joint to perform seal inspection, and the oil pipe seal inspection method comprises the following steps: step S10: installing a seal checking joint to an oil pipe to be checked and sealed; step S20: connecting the fluid conveying equipment with the seal checking joint; step S30: conveying the fluid sealing joint into an oil pipe to be sealed through fluid conveying equipment, and increasing the pressure in the oil pipe to be sealed to a preset value; step S40: stopping conveying the fluid, observing the pressure drop condition in the oil pipe to be tested and sealed, judging whether the pressure drop value in the oil pipe to be tested and sealed exceeds 30% of a preset value within 3-5 minutes, and if so, not sealing the oil pipe to be tested and sealed; if not, the oil pipe sealing is to be checked.
Furthermore, an oil pipe to be tested and sealed is connected with a wellhead oil nozzle sleeve, one end of the oil pipe to be tested and sealed, which is close to the wellhead oil nozzle sleeve, is provided with a production valve, the wellhead oil nozzle sleeve is provided with a cavity, a first opening communicated with the cavity, a second opening communicated with the cavity and a third opening communicated with the cavity, the oil pipe to be tested and sealed is arranged at the first opening, the wellhead oil nozzle sleeve is connected with a back pressure valve, the back pressure valve is arranged at the second opening, the wellhead oil nozzle sleeve is connected with the wellhead oil nozzle sleeve plug, and the wellhead oil nozzle sleeve plug is arranged at the third opening; before step S10, the method for verifying the seal of the oil pipe further includes: step S05: and closing the production valve and the back pressure valve, emptying the wellhead choke sleeve, removing the wellhead choke plug of the choke sleeve and opening the third opening.
Further, step S10 includes: step S11: connecting the first thread section with at least part of the inner wall surface of a wellhead oil nozzle sleeve to enable the overflowing cavity of the joint body to be communicated with the first opening; step S12: and connecting the plugging structure with at least part of the inner wall surface of the wellhead oil nozzle sleeve, and plugging the third opening by using the plugging structure.
Further, between step S20 and step S30, the method for verifying the seal of the oil pipe further includes: step S25: and opening the production valve to communicate the overflowing cavity of the joint body with the inner cavity of the oil pipe to be tested and sealed.
By applying the technical scheme of the invention, the connector body is connected with the component to be verified through the first threaded section, the overflowing cavity is communicated with the inner cavity of the component to be verified through the outlet, fluid is introduced into the overflowing cavity through the inlet, the fluid enters the inner cavity of the component to be verified through the outlet, the pressure in the component to be verified is increased to a preset value, and then whether the component to be verified is sealed or not is judged according to the pressure change condition in the component to be verified, so that the pressure test and seal verification operation of the component to be verified is completed. When the seal checking joint is used for carrying out pressure test and seal checking on an oil pipe of an oil pumping well, the joint body is in threaded connection with at least part of the inner wall surface of a wellhead oil nozzle sleeve through the first thread section or is directly in threaded connection with at least part of the inner wall surface of the oil pipe to be checked, so that the overflowing cavity is communicated with the inner cavity of the oil pipe to be checked, fluid can be introduced into the overflowing cavity through the inlet of the joint body and enters the inner cavity of the oil pipe to be checked through the outlet, the pressure in the oil pipe to be checked is increased to a preset value, and whether the oil pipe to be checked is sealed or not can be further judged; utilize the in-process that tests to seal to pumping well oil pipe that tests that connects of this application, the fluid can directly get into through the flow chamber and wait to test the inner chamber of sealing oil pipe, need not to get into the cavity of well head glib talker's cover, like this, the pressure in the well head glib talker's cover and the pressure of back pressure valve department all can not increase to can avoid the pressure that back pressure valve department bore to surpass the problem of back pressure valve's operating pressure, and then can carry out the pressure testing to pumping well oil pipe smoothly and test the sealing.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
figure 1 shows a schematic structural view of an embodiment of a seal verification joint according to the present invention;
FIG. 2 is a schematic diagram showing the connection of the seal testing joint of FIG. 1 with a wellhead nipple sleeve;
FIG. 3 shows a flow chart of an embodiment of a method of seal verification of a tubing according to the present invention; and
figure 4 shows a detailed flow chart of the tubing seal verification method of figure 3.
Wherein the figures include the following reference numerals:
10. a connector body; 11. a flow-through chamber; 111. a first cavity section; 112. a second cavity section; 12. an inlet; 13. an outlet; 14. an external thread; 20. a first thread segment; 40. a first operation unit; 41. an operation block; 50. a second thread segment; 60. a blocking structure; 61. plugging the body; 62. a third thread segment; 63. a stopper; 64. a second operation section; 70. a sealing structure; 80. a wellhead choke sleeve; 81. a cavity; 82. a first opening; 83. a second opening.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
It is noted that, unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
In the present invention, unless specified to the contrary, use of the terms of orientation such as "upper, lower, top, bottom" or the like, generally refer to the orientation as shown in the drawings, or to the component itself in a vertical, perpendicular, or gravitational orientation; likewise, for ease of understanding and description, "inner and outer" refer to the inner and outer relative to the profile of the components themselves, but the above directional words are not intended to limit the invention.
In the embodiment of the invention, an oil pipe is connected with a wellhead choke sleeve, one end of the oil pipe close to the wellhead choke sleeve is provided with a production valve, the wellhead choke sleeve is provided with a cavity, a first opening communicated with the cavity, a second opening communicated with the cavity and a third opening communicated with the cavity, the oil pipe is arranged at the first opening, the wellhead choke sleeve is connected with a back pressure valve, the back pressure valve is arranged at the second opening, the wellhead choke sleeve is connected with a wellhead choke plug, and the wellhead choke plug is arranged at the third opening.
The invention provides a seal checking joint and an oil pipe seal checking method, aiming at the problem that in the prior art, in the process of carrying out pressure test and seal checking on an oil pipe of a pumping well, the pressure in a cavity of a wellhead oil nozzle sleeve and the pressure at a back pressure valve are the same as the pressure in the oil pipe, so that the pressure borne by the back pressure valve exceeds the working pressure of the back pressure valve.
It should be noted that, in the embodiment of the present invention, the component to be verified is a pumping well tubing or a wellhead nozzle sleeve connected to the pumping well tubing.
As shown in fig. 1 and 2, in the embodiment of the present invention, the seal check connector comprises a connector body 10, a first thread section 20 and a first operating part 40, wherein the connector body 10 has a flow passing cavity 11, an inlet 12 communicated with the flow passing cavity 11 and an outlet 13 communicated with the flow passing cavity 11; the first thread section 20 is connected with the joint body 10, the first thread section 20 is arranged on the outer wall surface of the joint body 10 and is positioned at one end of the outlet 13, and the joint body 10 is connected with a part to be verified through the first thread section 20; the first operation portion 40 is provided to the joint body 10, and screwing the first operation portion 40 can mount the joint body 10 to the member to be verified.
In the above arrangement, the connector body 10 is connected with the component to be verified through the first thread section 20, the overflowing cavity 11 is communicated with an inner cavity of the component to be verified through the outlet 13, fluid is introduced into the overflowing cavity 11 through the inlet 12, the fluid enters the inner cavity of the component to be verified through the outlet 13, the pressure in the component to be verified is increased to a preset value, and then whether the component to be verified is sealed or not is judged according to the pressure change condition in the component to be verified, so that the pressure test and seal verification operation of the component to be verified is completed.
When the seal checking joint is used for carrying out pressure test and seal checking on an oil pipe of an oil pumping well, the joint body 10 is in threaded connection with at least part of the inner wall surface of a wellhead oil nozzle sleeve through the first threaded section 20 or is directly in threaded connection with at least part of the inner wall surface of the oil pipe to be checked, so that the overflowing cavity 11 is communicated with the inner cavity of the oil pipe to be checked, fluid can be introduced into the overflowing cavity 11 through the inlet 12 of the joint body 10 and enters the inner cavity of the oil pipe to be checked through the outlet 13, the pressure in the oil pipe to be checked is increased to a preset value, and whether the oil pipe to be checked is sealed or not can be further judged; compared with the technology that the pressure born by the back pressure valve exceeds the working pressure of the back pressure valve, the pressure inside the cavity of the wellhead oil nozzle sleeve and the pressure at the back pressure valve are the same as the pressure inside the oil pipe, and the pressure born by the back pressure valve exceeds the working pressure of the back pressure valve.
In addition, the first operating portion 40 is provided for facilitating mounting of the joint body 10 to the member to be verified; specifically, by screwing the first operating portion 40, the first thread section 20 can be screw-fitted to the member to be verified, and finally the joint body 10 can be screw-connected to the member to be mounted.
Preferably, as shown in fig. 1 and fig. 2, in an embodiment of the present invention, the first threaded section 20 is a section of thread disposed on an outer wall surface of the joint body 10, the first threaded section 20 is integrally formed with the joint body 10, and the joint body 10 is in threaded connection with the component to be verified through the first threaded section 20. Of course, in an alternative embodiment not shown in the drawings of the present application, the first thread section 20 may be separately disposed and connected with the joint body 10 according to actual needs, wherein the first thread section 20 has an external thread to facilitate connection with the component to be verified.
As shown in fig. 1 and 2, in the embodiment of the present invention, the seal check connector further includes a sealing structure 70 disposed on the first threaded section 20, and the sealing structure 70 is used for sealing a connection between the first threaded section 20 and the component to be checked. The first thread section 20 can be connected with the component to be verified in a sealing mode through the sealing structure 70, and the problem that the pressure borne by the back pressure valve exceeds the working pressure of the back pressure valve due to the fact that fluid enters the inner cavity of the wellhead choke sleeve through the connection part between the first thread section 20 and the component to be verified and the pressure in the wellhead choke sleeve and the pressure at the back pressure valve are increased can be solved; the connection between the first threaded section 20 and the component to be verified may also be made more secure by the provision of the sealing structure 70.
Preferably, a sealing arrangement 70 is located at the end of the first thread segments 20 remote from the outlet 13 to ensure sealing performance.
Preferably, the seal structure 70 is a gasket. Preferably, the seal structure 70 is a metal gasket.
As shown in fig. 1 and 2, in the embodiment of the present invention, the first operating portion 40 includes an operating block 41 disposed on at least a portion of an outer wall surface of the joint body 10, and the operating block 41 has at least two outer wall surfaces disposed at an included angle. By applying an external force to the operation block 41, that is, screwing the operation block 41, the operation block 41 can drive the joint body 10 to rotate around its axis, so that the first thread section 20 is in thread fit with the component to be verified, and the purpose of connecting the joint body 10 with the component to be verified in thread is achieved. The fitting body 10 can be easily installed by using a tool such as a wrench or a spanner by providing the operation block 41.
In addition, at least two outer wall surfaces of the operation block 41 are arranged in an included angle, so that external force can be conveniently applied to the operation block 41, and the operation block 41 can be conveniently screwed.
Preferably, as shown in fig. 1 and 2, in the embodiment of the present invention, the operation block 41 is a polygonal block body which is inserted into the joint body 10. The operation block 41 can be conveniently and easily screwed, so that the operation block 41 drives the joint body 10 to rotate, and the joint body 10 is conveniently in threaded connection with the part to be verified.
Preferably, the operation block 41 is integrally formed with the joint body 10. The operation block 41 and the joint body 10 are firmly connected by the arrangement, and the joint body 10 can be accurately and stably driven to rotate by the operation block 41. Of course, in alternative embodiments, the operation block 41 may be provided separately from the joint body 10 and connected thereto according to actual needs.
As shown in fig. 1 and 2, in the embodiment of the present invention, the seal check connector further includes a second threaded section 50 disposed on the inner wall surface of the flow-through chamber 11, the second threaded section 50 is located at one end of the inlet 12, and the connector body 10 is connected to the fluid conveying equipment through the second threaded section 50.
In the above arrangement, the connector body 10 is connected with the fluid conveying equipment through the second threaded section 50, the inner cavity of the fluid conveying equipment is communicated with the overflowing cavity 11 through the inlet 12 of the connector body 10, fluid is conveyed into the overflowing cavity 11 through the fluid conveying equipment, the fluid enters the inner cavity of the component to be verified through the outlet 13, the pressure in the component to be verified is increased to a preset value, and therefore the purpose of performing pressure test and seal verification on the component to be verified is achieved.
Preferably, the fluid delivery apparatus is a pump truck. The second thread segment 50 is threaded to mate with the pump truck quick connector oil line.
Preferably, in the embodiment of the present invention, the second thread section 50 is a section of thread provided on an inner wall surface of the flow passage cavity 11 of the connector body 10, the second thread section 50 is integrally formed with the connector body 10, and the connector body 10 is in threaded connection with the fluid delivery device through the second thread section 50. Of course, in an alternative embodiment not shown in the drawings of the present application, the second thread section 50 may be separately provided and connected to the connector body 10 according to actual needs, wherein the second thread section 50 has an internal thread to facilitate connection with a fluid delivery device.
Preferably, as shown in fig. 1 and 2, in the embodiment of the present invention, the overflow chamber 11 extends through the entire connector body 10 to ensure the flow of the high-pressure liquid and block the passage between the wellhead production valve and the back-pressure valve. The overflowing cavity 11 comprises a first cavity section 111 and a second cavity section 112, the first cavity section 111 corresponds to the second threaded section 50, the second cavity section 112 is communicated with the first cavity section 111, the inlet 12, the first cavity section 111, the second cavity section 112 and the outlet 13 are sequentially arranged, the radial size of the inner wall surface of the first cavity section 111 is larger than that of the inner wall surface of the second cavity section 112, and therefore the overflowing cavity 11 can enable the connector body 10 to be connected with fluid conveying equipment through the second threaded section 50 and can guarantee the flow of fluid in the overflowing cavity 11.
Preferably, the second cavity segment 112 is a through-hole having a diameter φ 20.
As shown in fig. 1 and 2, in the embodiment of the present invention, the first operating portion 40 is located between the first thread segment 20 and the second thread segment 50. By the arrangement, the first thread section 20 can be conveniently connected with the part to be verified, the second thread section 50 can be conveniently connected with the fluid conveying equipment, and meanwhile, the purpose of connecting the first thread section 20 with the part to be verified by screwing the first operation part 40 can be achieved; the arrangement is reasonable and convenient.
Preferably, in the embodiment of the present invention, the operation block 41 is located at an end where the inlet 12 is located. When the joint body 10 is in threaded fit with a component to be verified through the first threaded section 20, the operation block 41 is located outside the component to be verified, and through the above arrangement, the joint body 10 can be conveniently driven to rotate by applying external force to the operation block 41, so that the joint body 10 is in threaded connection with the component to be verified.
In the embodiment of the invention, as shown in fig. 1 and fig. 2, the seal-checking connector further includes a blocking structure 60 connected to the connector body 10, the blocking structure 60 is movably disposed relative to the connector body 10, and the blocking structure 60 is used for blocking a gap between the connector body 10 and a component to be checked.
Through the removal of plugging structure 60 for connecting body 10, make plugging structure 60 shutoff joint body 10 gradually with treat the gap between the check part, the setting can avoid treating check part and external environment intercommunication like this, treat to take place the material exchange between check part and the external environment (for example, when utilizing the check joint of this application to carry out the pressure testing to pumping well oil pipe and check and seal, need to close the back pressure valve, through the plugging structure 60 to joint body 10 and the shutoff effect of the clearance between the check part, can avoid when the tight condition of back pressure valve closure appears, oil gas leaks to external problem through the clearance that connects body 10 and treat between the check part), and can make and connect body 10 and treat that the check part is connected more steadily, make and treat that the check part can support and fixed joint body 10 through plugging structure 60 steadily.
As shown in fig. 1 and fig. 2, in the embodiment of the present invention, the blocking structure 60 includes a blocking body 61 disposed on the outer periphery of the joint body 10, at least a part of the inner wall surface of the blocking body 61 is provided with an internal thread, at least a part of the outer wall surface of the joint body 10 is provided with an external thread 14 adapted to the internal thread, and the blocking body 61 is in threaded engagement with the joint body 10.
In the above arrangement, the plugging body 61 is disposed on the outer periphery of the joint body 10 and is in threaded fit with the joint body 10, and through the threaded fit between the plugging body 61 and the joint body 10, the rotational motion can be converted into the linear motion, so that the plugging body 61 is movably disposed relative to the joint body 10, and further, through the movement of the plugging body 61 relative to the joint body 10, the purpose of plugging the gap between the joint body 10 and the component to be verified by using the plugging body 61 can be achieved.
As shown in fig. 1 and 2, in the embodiment of the present invention, the blocking structure 60 further includes a third threaded section 62 connected to the blocking body 61, the third threaded section 62 is disposed on at least a portion of an outer wall surface of the blocking body 61, and the blocking body 61 is threadedly connected to the component to be verified through the third threaded section 62.
In the above arrangement, the plugging body 61 is in threaded fit with the joint body 10 through the internal threads on the inner wall surface of the plugging body 61 and can move relative to the joint body 10, and in the process that the plugging body 61 moves relative to the joint body 10, the plugging body 61 is in threaded connection with the component to be verified through the third threaded section 62, so that the purpose of plugging the gap between the joint body 10 and the component to be verified through the plugging body 61 is achieved. The plugging body 61 supports the whole joint body 10 and seals a third opening of the wellhead oil nozzle sleeve, so that the problem of oil gas leakage possibly caused by untight closing of a back pressure valve is prevented.
Preferably, in an embodiment of the present invention, the third threaded section 62 is a section of thread disposed on at least a portion of an outer wall surface of the plugging body 61, the plugging body 61 is integrally formed with the third threaded section 62, and the plugging body 61 is in threaded connection with the component to be verified through the third threaded section 62. Of course, in an alternative embodiment not shown in the drawings of the present application, the blocking body 61 and the third threaded section 62 may be separately disposed and connected according to actual needs, wherein the third threaded section 62 has an external thread so as to be connected with the component to be verified.
As shown in fig. 1 and 2, in the embodiment of the present invention, the blocking structure 60 further comprises a stopper 63 connected with the blocking body 61. The stop member 63 is disposed on the outer wall surface of the blocking body 61, and the third threaded section 62 is used for being connected with a component to be verified, so that at least a portion of the third threaded section 62 extends into an inner cavity of the component to be verified, and in order to prevent the blocking structure 60 from extending into the component to be verified entirely, the blocking structure 60 is not easy to take out, and the joint body 10 and the component to be verified are difficult to disassemble, and meanwhile, in order to prevent the blocking structure 60 from moving relative to the joint body 10, the internal thread of the blocking structure 60 is disengaged from the external thread 14, and the blocking structure 60 is caused to be separated from the external thread 14 of the joint body 10, so that the blocking structure 60 cannot well block a gap between the joint body 10 and the component to be verified, and therefore, the technical scheme of the application enables the blocking structure 60 to include the stop member 63, so as to avoid the above problem, and ensures that the blocking structure 60 can well block the gap between the joint body 10 and the component to be verified, and is convenient to disassemble.
Preferably, the stopper 63 is a sheet-like structure or a columnar structure provided on the outer wall surface of the occluding body 61.
As shown in fig. 1 and fig. 2, in the embodiment of the present invention, the blocking structure 60 further includes a second operating portion 64 connected to the blocking body 61, and under the action of an external force, the second operating portion 64 drives the blocking body 61 to move relative to the joint body 10. External force acts on the second operation portion 64, under the driving of the second operation portion 64, the plugging body 61 moves relative to the connector body 10, the internal thread of the plugging body 61 is in threaded fit with the external thread 14 on the connector body 10, the third threaded section 62 of the plugging body 61 is in threaded fit with the part to be verified, the external force is stopped being applied according to actual needs, the connector body 10 and the part to be verified are in threaded connection with the plugging body 61, and therefore the plugging body 61 plugs the gap between the connector body 10 and the part to be verified.
Preferably, in the embodiment of the present invention, the second operating portion 64 is provided on the outer wall surface of the blocking body 61, and the second operating portion 64 is integrally formed with the blocking body 61, so that the structural strength and the connection stability can be improved. Of course, in an alternative embodiment not shown in the drawings of the present application, the second operation portion 64 may be provided separately from the closing body 61 and connected thereto as needed.
Preferably, the structure of the second operating portion 64 is the same as the structure of the first operating portion 40, and the description thereof is omitted. Of course, the configuration of the second operation portion 64 may be different from that of the first operation portion 40 according to actual needs.
In the embodiment of the present invention, as shown in fig. 2, the second operating portion 64, the stop member 63 and the third thread segment 62 are sequentially disposed on the blocking body 61 along the fluid flowing direction. In other words, the distances of the third threaded section 62, the stop member 63 and the second operating portion 64 from the component to be verified are sequentially increased, so that the second operating portion 64, which is farther from the component to be verified, can move the plugging body 61 relative to the joint body 10 to make the plugging body 61 be in threaded engagement with the component to be verified through the third threaded section 62 or to make the plugging body 61 be disengaged from the component to be verified, and when the plugging body 61 is in threaded engagement with the component to be verified through the third threaded section 62, the stop member 63 can limit the limit position at which the plugging body 61 moves towards the component to be verified, so that the plugging structure 60 can always plug the gap between the joint body 10 and the component to be verified.
As shown in fig. 3, in the embodiment of the present invention, the seal verification method of the oil pipe uses the seal verification joint to perform seal verification, and the seal verification method of the oil pipe includes:
step S10: installing a seal checking joint to an oil pipe to be checked and sealed; step S20: connecting the fluid conveying equipment with the seal checking joint; step S30: conveying the fluid sealing joint into an oil pipe to be sealed through fluid conveying equipment, and increasing the pressure in the oil pipe to be sealed to a preset value; step S40: stopping conveying the fluid, observing the pressure drop condition in the oil pipe to be tested and sealed, judging whether the pressure drop value in the oil pipe to be tested and sealed exceeds 30% of a preset value within 3-5 minutes, and if so, not sealing the oil pipe to be tested and sealed; if not, the oil pipe sealing is to be checked.
In the above-mentioned setting, adopt the seal of examining of this application to treat the seal oil pipe and examine the seal, at first will examine the seal and connect the installation to waiting to examine the seal oil pipe, later with fluid conveying equipment with examine a articulate, make the inner chamber of fluid conveying equipment, the overflow chamber 11 of examining the seal joint and the inner chamber of waiting to examine the seal oil pipe communicate, like this, can be through fluid conveying equipment experience seal joint to waiting to examine the interior transport fluid of seal oil pipe to make and wait to examine the seal oil pipe internal pressure increase and increase to the predetermined value.
In the process of conveying fluid into the oil pipe to be tested, the technical scheme of the application is that the fluid is directly conveyed into the component to be tested through the experience sealing head of the fluid conveying equipment, and compared with the technology of conveying fluid into the oil pipe through the wellhead oil nozzle sleeve, the pressure in the wellhead oil nozzle sleeve and the pressure at the back pressure valve are the same as the pressure in the oil pipe, so that the pressure borne by the back pressure valve exceeds the working pressure of the back pressure valve.
When the pressure in the oil pipe to be sealed is increased to a preset value, observing the pressure reduction condition in the oil pipe to be sealed, and if the pressure in the oil pipe to be sealed is reduced by more than 30 percent within 3 to 5 minutes (namely the pressure reduction value in the oil pipe to be sealed is more than 30 percent of the preset value), judging that the oil pipe to be sealed is not sealed and a leakage breaking point is arranged on the oil pipe to be sealed; otherwise, judging that the oil pipe to be tested and sealed is sealed, and judging that no leakage breaking point exists on the oil pipe to be tested and sealed.
Preferably, in an embodiment of the present invention, the above "predetermined value" is 5MPa to 8MPa.
It should be noted that, the above-mentioned "sealing" refers to that there is no leakage point on the oil pipe, the oil gas in the oil pipe cannot leak or leaks very little (for example, when the pressure in the oil pipe to be sealed increases to a predetermined value, within 3 minutes to 5 minutes, the pressure drop value in the oil pipe to be sealed is within 30% of the predetermined value) to the outside of the oil pipe, and "not sealing" refers to that there is a leakage point on the oil pipe, the oil gas in the oil pipe leaks out of the oil pipe very quickly (for example, when the pressure in the oil pipe to be sealed increases to a predetermined value, within 3 minutes to 5 minutes, the pressure drop value in the oil pipe to be sealed exceeds 30% of the predetermined value).
Because the oil pipe seal inspection method of this application adopts the seal inspection joint of this application to test and seals, consequently, the oil pipe seal inspection method of this application also has the above-mentioned advantage of the seal inspection joint of this application, and this here is no longer repeated.
In the embodiment of the invention, the oil pipe to be tested and sealed is connected with a wellhead device, and the seal testing joint is connected with the oil pipe to be tested and sealed through the wellhead device so as to test the seal of the oil pipe to be tested and sealed; the wellhead device is installed on a wellhead of an oil and natural gas well and used for controlling the pressure and direction of gas and liquid fluids, and comprises a wellhead oil nozzle sleeve 80, a production valve, a back pressure valve and the like.
Specifically, as shown in fig. 4, in the embodiment of the present invention, an oil pipe to be tested and sealed is connected to a wellhead oil nozzle sleeve 80, one end of the oil pipe to be tested and sealed, which is close to the wellhead oil nozzle sleeve 80, is provided with a production valve, the wellhead oil nozzle sleeve 80 is provided with a cavity 81, a first opening 82 communicated with the cavity 81, a second opening 83 communicated with the cavity 81, and a third opening communicated with the cavity 81, the oil pipe to be tested and sealed is arranged at the first opening 82, the wellhead oil nozzle sleeve 80 is connected to a back pressure valve, the back pressure valve is arranged at the second opening 83, the wellhead oil nozzle sleeve 80 is connected to a wellhead oil nozzle sleeve plug, and the wellhead oil nozzle sleeve plug is arranged at the third opening; before step S10, the method for verifying the seal of the oil pipe further includes:
step S05: closing the production valve and the back pressure valve, emptying the wellhead choke sleeve 80, removing the wellhead choke plug of the choke sleeve and opening the third opening.
Through the steps, the wellhead oil nozzle sleeve 80 connected with the oil pipe to be tested can be emptied, the third opening is opened, when the oil pipe to be tested is required to be tested to test the seal, the seal testing joint is installed in the cavity 81 of the wellhead oil nozzle sleeve 80 from the third opening, so that the fluid conveying equipment can be directly connected with the oil pipe to be tested through the seal testing joint, the overflowing cavity 11 of the fluid seal testing joint can be directly conveyed into the oil pipe to be tested, and the oil pipe to be tested is normally and smoothly tested to perform the pressure test seal work.
The wellhead nipple sleeve 80 has a cavity 81 and first, second and third openings 82, 83 each in communication with the cavity 81; the oil pipe to be tested and sealed is connected with the wellhead oil nozzle sleeve 80, the inner cavity of the oil pipe to be tested and sealed is communicated with the first opening 82, the inner cavity of the oil pipe to be tested and sealed is communicated with the cavity 81 through the first opening 82, and a production valve is arranged between the oil pipe to be tested and sealed and the wellhead oil nozzle sleeve 80; the back pressure valve is connected with the wellhead nozzle sleeve 80, and the back pressure valve is positioned at the second opening 83; and the wellhead choke plug is used for plugging a third opening of the wellhead choke sleeve.
In the prior art, when an oil pipe to be tested is tested and sealed, a wellhead oil nozzle sleeve plug is taken down to open a third opening, a fluid conveying device is connected with the wellhead oil nozzle sleeve and conveys fluid into a cavity of the wellhead oil nozzle sleeve through the third opening, the fluid enters the oil pipe to be tested and sealed through a first opening, so that the pressure in the oil pipe to be tested and sealed is increased to a preset value, in the process, the cavity of the wellhead oil nozzle sleeve is filled with the fluid and the pressure in the oil pipe to be tested and sealed is the same as the pressure in the oil pipe to be tested, therefore, the fluid pressure borne by a back pressure valve is the same as the pressure in the oil pipe to be tested, the pressure borne by the back pressure valve exceeds the working pressure of the back pressure valve, a large safety risk exists, and the pressure testing and sealing work of the oil pipe to be tested and sealed can not be normally carried out.
Compare in above-mentioned technical scheme, among the technical scheme of this application, it wears to establish in the cavity 81 of well head oil nozzle sleeve 80 to test the sealing joint, fluid conveying equipment is connected with waiting to test the oil pipe through testing the sealing joint is direct, the overflow chamber 11 of the fluid experience sealing joint of fluid conveying equipment transport is direct to waiting to test the inner chamber of sealing oil pipe, the fluid can not get into in the cavity 81 of well head oil nozzle sleeve 80, also can not make the pressure increase in well head oil nozzle sleeve 80, like this, the pressure that back pressure valve department bore just can not surpass the operating pressure of back pressure valve, thereby can make the pressure testing of waiting to test the oil pipe seal work normally, go on smoothly.
As shown in fig. 4, in the embodiment of the present invention, step S10 includes:
step S11: connecting the first thread section 20 with at least part of the inner wall surface of the wellhead nozzle sleeve 80, so that the overflowing cavity 11 of the joint body 10 is communicated with the first opening 82; step S12: the blocking structure 60 is connected to at least a part of the inner wall surface of the wellhead oil nozzle sleeve 80, and the third opening is blocked by the blocking structure 60.
In the above arrangement, the first thread section 20 is connected with at least part of the inner wall surface of the wellhead oil nozzle sleeve 80, so as to achieve the purpose of connecting the joint body 10 with the oil pipe to be checked, the first thread section 20 is located at the first opening 82, and the flow passing cavity 11 is communicated with the inner cavity of the oil pipe to be checked through the first opening 82; the plugging structure 60 plugs a gap between the joint body 10 and at least part of the inner wall surface of the wellhead oil nozzle sleeve 80, and the plugging structure 60 plugs the third opening; through the arrangement, the connector body 10 penetrates through the cavity 81 of the wellhead oil nozzle sleeve 80, the connector body 10 is connected with at least part of the inner wall surface of the wellhead oil nozzle sleeve 80 through the first thread section 20, and the connector body 10 is connected with at least part of the inner wall surface of the wellhead oil nozzle sleeve 80 through the blocking structure 60, so that the overflowing cavity 11 of the connector body 10 is isolated from and not communicated with the cavity 81 of the wellhead oil nozzle sleeve 80, fluid conveyed by the fluid conveying equipment enters the overflowing cavity 11 through the inlet 12 and is conveyed into the inner cavity of an oil pipe to be tested and sealed through the outlet 13 and the first opening 82, in the process, the fluid cannot enter the cavity 81 of the wellhead oil nozzle sleeve 80, the pressure born by the back pressure valve cannot exceed the working pressure of the back pressure valve, and the pressure testing work of the oil pipe to be tested and sealed can be carried out normally and smoothly.
As shown in fig. 4, in the embodiment of the present invention, between step S20 and step S30, the method for verifying the seal of the oil pipe further includes:
step S25: and opening the production valve to enable the overflowing cavity 11 of the connector body 10 to be communicated with the inner cavity of the oil pipe to be tested and sealed.
The production valve is arranged between the oil pipe to be tested and sealed and the wellhead oil nozzle sleeve 80, and only when the production valve is opened, the flow passing cavity 11 of the seal testing joint arranged in the wellhead oil nozzle sleeve 80 can be communicated with the inner cavity of the oil pipe to be tested, and then the fluid can enter the oil pipe to be tested through the flow cavity 11, so that the oil pipe to be tested is pressurized.
Specifically, in the embodiment of the invention, the operation steps of the oil pipe seal checking method are as follows:
firstly, stopping the pumping unit, braking and cutting off a power supply;
secondly, closing a well head production valve, closing a back pressure valve, opening an emptying valve for emptying, and removing a well head oil nozzle sleeve plug;
thirdly, installing a seal checking joint to the wellhead oil nozzle sleeve 80, checking that the sealing structure 70 is intact, screwing the first thread section 20 into a wellhead oil nozzle screw hole, screwing the first operation part 40 by using a tool, screwing the plugging structure 60 into the wellhead oil nozzle sleeve screw hole (located at a third opening of the wellhead oil nozzle sleeve) through the external thread 14 of the joint body 10, screwing the second operation part 64 by using the tool, and blocking a passage between a wellhead production valve and a back-pressure valve;
fourthly, quickly connecting the pump truck pipeline with the second thread section 50 by using a seal checking connector, and opening a wellhead production valve to ensure that the overflowing cavity 11 is unblocked;
fifthly, starting a pump to perform pressurization, enabling the pressurized high-pressure liquid of the pump truck to directly enter an oil pipe through a seal checking joint and a wellhead production valve to perform pressure holding and checking, enabling the pressure to rise to 5MPa, stopping the pump, and observing the pressure reduction condition of the pump truck (because the pump truck is communicated with the oil pipe through the seal checking joint arranged on a wellhead oil nozzle sleeve of a wellhead device, the liquid pressure in the pump truck is the same as the liquid pressure in the oil pipe, and the pressure reduction condition in the oil pipe can be conveniently and visually reflected by observing the pressure reduction condition in the pump truck);
sixthly, closing a wellhead production valve, emptying the pump truck, and disassembling a pump truck pipeline and a seal checking connector;
seventhly, installing a wellhead choke plug, closing an emptying valve, opening a wellhead back pressure valve, and opening a wellhead production valve;
and step eight, switching on a power supply, loosening a brake, and starting the oil pumping unit to recover production.
The invention provides a special joint for pressure test of an oil pipe of a pumping well (namely a seal test joint) and a matched oil pipe seal test method aiming at the overpressure phenomenon of a low-pressure part of a well mouth (namely the problem that the pressure born by a back pressure valve exceeds the working pressure of the back pressure valve) in the pressure test seal test process of the oil pipe of the pumping well so as to eliminate the potential safety hazard in the work.
The invention provides a special connector (namely a seal checking connector) for pressure test of an oil pipe of a pumping well and a matched oil pipe seal checking method, wherein the seal checking connector is arranged at a wellhead of the pumping well and is quickly connected with a pipeline of a pump truck, a channel between a wellhead production valve and a back pressure valve is cut off, and high-pressure liquid pressurized by the pump truck directly enters the oil pipe through the seal checking connector and the wellhead production valve to be subjected to pressure holding and seal checking, so that the phenomenon that a low-pressure part of the wellhead exceeds the working pressure (namely the problem that the pressure born by the back pressure valve exceeds the working pressure of the back pressure valve) in the pressure test process of the oil pipe of the pumping well is avoided, the smooth development of the work is ensured, and the working efficiency is improved.
The invention is suitable for the technical field of pressure test and seal inspection of the oil pipe of the pumping well in the oil exploitation industry, can eliminate the phenomenon that the low-pressure part of the well head exceeds the working pressure in the pressure test and seal inspection process of the oil pipe of the pumping well, eliminates the hidden operation trouble and improves the working efficiency.
From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects: the connector body is connected with the part to be checked through the first thread section, the overflowing cavity is communicated with the inner cavity of the part to be checked through the outlet, fluid is introduced into the overflowing cavity through the inlet, the fluid enters the inner cavity of the part to be checked through the outlet, the pressure in the part to be checked is increased to a preset value, and then whether the part to be checked is sealed or not is judged according to the pressure change condition in the part to be checked, so that the pressure test and seal checking operation of the part to be checked is completed. When the seal checking joint is used for carrying out pressure test and seal checking on an oil pipe of an oil pumping well, the joint body is in threaded connection with at least part of the inner wall surface of a wellhead oil nozzle sleeve through the first thread section or is directly in threaded connection with at least part of the inner wall surface of the oil pipe to be checked, so that the overflowing cavity is communicated with the inner cavity of the oil pipe to be checked, fluid can be introduced into the overflowing cavity through the inlet of the joint body and enters the inner cavity of the oil pipe to be checked through the outlet, the pressure in the oil pipe to be checked is increased to a preset value, and whether the oil pipe to be checked is sealed or not can be further judged; utilize the in-process that tests to seal to pumping well oil pipe that tests that connects of this application, the fluid can directly get into through the flow chamber and wait to test the inner chamber of sealing oil pipe, need not to get into the cavity of well head glib talker cover, like this, the pressure in the well head glib cover and the pressure of back pressure valve department all can not increase to can avoid the problem that the pressure that back pressure valve department bore surpasss the operating pressure of back pressure valve, and then can carry out the pressure testing to pumping well oil pipe smoothly and test the sealing.
It is to be understood that the above-described embodiments are only a few, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, shall fall within the protection scope of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the accompanying drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (11)
1. A seal-testing fitting, comprising:
a fitting body (10), the fitting body (10) having an overflow cavity (11), an inlet (12) in communication with the overflow cavity (11), and an outlet (13) in communication with the overflow cavity (11);
the first thread section (20) is connected with the joint body (10), the first thread section (20) is arranged on the outer wall surface of the joint body (10) and located at one end where the outlet (13) is located, and the joint body (10) is connected with a part to be verified through the first thread section (20);
a first operation part (40) provided to the joint body (10), wherein the joint body (10) can be attached to the member to be verified by screwing the first operation part (40).
2. The seal inspection connector according to claim 1, further comprising a second threaded section (50) provided on an inner wall surface of the overflow chamber (11), wherein the second threaded section (50) is located at an end where the inlet (12) is located, and the connector body (10) is connected with a fluid conveying device through the second threaded section (50).
3. The seal inspection connector according to claim 2, wherein the first operating portion (40) is located between the first threaded section (20) and the second threaded section (50).
4. The seal testing joint according to any of claims 1 to 3, characterized in that it further comprises a blocking structure (60) connected to the joint body (10), said blocking structure (60) being movably arranged with respect to the joint body (10), said blocking structure (60) being adapted to block a gap between the joint body (10) and the component to be verified.
5. The seal inspection joint according to claim 4, wherein the sealing structure (60) comprises a sealing body (61) arranged on the outer periphery of the joint body (10), at least part of the inner wall surface of the sealing body (61) is provided with an internal thread, at least part of the outer wall surface of the joint body (10) is provided with an external thread (14) matched with the internal thread, and the sealing body (61) is in threaded fit with the joint body (10).
6. The seal inspection connector of claim 5,
the blocking structure (60) further comprises a third threaded section (62) connected with the blocking body (61), the third threaded section (62) is arranged on at least part of the outer wall surface of the blocking body (61), and the blocking body (61) is in threaded connection with the component to be verified through the third threaded section (62); or,
the occlusion structure (60) further comprising a stopper (63) connected with the occlusion body (61); or,
the plugging structure (60) further comprises a second operation part (64) connected with the plugging body (61), and under the action of external force, the second operation part (64) drives the plugging body (61) to move relative to the joint body (10); or,
the blocking structure (60) further comprises a third thread section (62), a stop piece (63) and a second operating part (64), and the second operating part (64), the stop piece (63) and the third thread section (62) are sequentially arranged on the blocking body (61) along the flow direction of the fluid.
7. The seal inspection connector according to any one of claims 1 to 3,
the seal checking connector further comprises a sealing structure (70) arranged on the first threaded section (20), and the sealing structure (70) is used for sealing the connection position between the first threaded section (20) and the component to be checked; or,
the first operation part (40) comprises an operation block (41) arranged on at least part of the outer wall surface of the joint body (10), and the operation block (41) is provided with at least two outer wall surfaces arranged in an included angle mode.
8. A method for testing a seal of a tubing, wherein the method for testing a seal of a tubing uses the seal testing joint of any one of claims 1 to 7, and the method for testing a seal of a tubing comprises the following steps:
step S10: installing a seal checking joint to an oil pipe to be checked and sealed;
step S20: connecting the fluid conveying equipment with a seal checking joint;
step S30: conveying fluid into the oil pipe to be checked and sealed through the seal checking joint by the fluid conveying equipment, so that the pressure in the oil pipe to be checked and sealed is increased to a preset value;
step S40: stopping conveying fluid, observing the pressure drop condition in the oil pipe to be checked and sealed, and judging whether the pressure drop value in the oil pipe to be checked and sealed exceeds 30% of the preset value within 3-5 minutes, if so, the oil pipe to be checked and sealed is not sealed; and if not, sealing the oil pipe to be sealed.
9. The oil pipe seal testing method according to claim 8, characterized in that the oil pipe to be tested and sealed is connected with a wellhead oil nozzle sleeve (80), one end of the oil pipe to be tested and sealed, which is close to the wellhead oil nozzle sleeve (80), is provided with a production valve, the wellhead oil nozzle sleeve (80) is provided with a cavity (81), a first opening (82) communicated with the cavity (81), a second opening (83) communicated with the cavity (81) and a third opening communicated with the cavity (81), the oil pipe to be tested and sealed is arranged at the first opening (82), the wellhead oil nozzle sleeve (80) is connected with a back pressure valve, the back pressure valve is arranged at the second opening (83), the wellhead oil nozzle sleeve (80) is connected with a wellhead oil nozzle sleeve plug, and the wellhead oil nozzle sleeve plug is arranged at the third opening;
before the step S10, the oil pipe seal verification method further includes:
step S05: and closing the production valve and the back pressure valve, emptying the wellhead oil nozzle sleeve (80), removing the wellhead oil nozzle sleeve plug, and opening the third opening.
10. The tubing seal verification method according to claim 9, wherein the step S10 comprises:
step S11: connecting the first thread section (20) with at least part of the inner wall surface of the wellhead oil nozzle sleeve (80) to enable the overflowing cavity (11) of the joint body (10) to be communicated with the first opening (82);
step S12: and connecting a blocking structure (60) with at least part of the inner wall surface of the wellhead oil nozzle sleeve (80), and blocking the third opening by using the blocking structure (60).
11. The method of verifying the seal of the oil pipe according to claim 9, wherein between the step S20 and the step S30, the method further comprises:
step S25: and opening the production valve to enable the overflowing cavity (11) of the connector body (10) to be communicated with the inner cavity of the oil pipe to be sealed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110391212.7A CN115199219A (en) | 2021-04-12 | 2021-04-12 | Seal checking joint and oil pipe seal checking method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110391212.7A CN115199219A (en) | 2021-04-12 | 2021-04-12 | Seal checking joint and oil pipe seal checking method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115199219A true CN115199219A (en) | 2022-10-18 |
Family
ID=83571657
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110391212.7A Pending CN115199219A (en) | 2021-04-12 | 2021-04-12 | Seal checking joint and oil pipe seal checking method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115199219A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115874994A (en) * | 2023-02-21 | 2023-03-31 | 四川宏大安全技术服务有限公司 | Oil nozzle combination device for gas production |
-
2021
- 2021-04-12 CN CN202110391212.7A patent/CN115199219A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115874994A (en) * | 2023-02-21 | 2023-03-31 | 四川宏大安全技术服务有限公司 | Oil nozzle combination device for gas production |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9644443B1 (en) | Remotely-operated wellhead pressure control apparatus | |
| US20200347706A1 (en) | Fracturing Pump With In-Line Fluid End | |
| RU121025U1 (en) | DEVICE FOR PIPELINE SEALING WHEN REPAIRING A BALL VALVE UNDER PRESSURE | |
| CN110513095B (en) | Oil and gas well fracturing transformation process adopting controllable delay opening toe end sliding sleeve | |
| US9388654B2 (en) | High pressure mechanical seal for cables and power lines in oil wells | |
| CN1087806C (en) | Apparatus and method for determinating integrity of oil well tubing | |
| CN105386737A (en) | Blowout preventing hole opener for casing pipe | |
| US10787883B2 (en) | Testable back pressure valves | |
| CN115199219A (en) | Seal checking joint and oil pipe seal checking method | |
| US4458903A (en) | Control line sealing connection | |
| CN205823229U (en) | A kind of continuous oil pipe anti-blow-out box | |
| CN2753869Y (en) | Snubbing replaceable high-pressure natural gas recovery wellhead sluice valve device | |
| CN110056325B (en) | Pressure testing device and method for sucker rod pump oil production well mouth facility | |
| US8438918B1 (en) | Method for pressure testing a pressure foot assembly | |
| CN106593340B (en) | High-pressure shallow totally-enclosed drilling plug device and using method thereof | |
| US8661877B2 (en) | Apparatus and method for testing float equipment | |
| US8683848B1 (en) | Oil well tubing pressure testing system and method of use | |
| US20170260830A1 (en) | Transition tool and method | |
| US10458198B2 (en) | Test dart system and method | |
| RU2394152C1 (en) | Procedure for repair of production wells | |
| RU2728754C2 (en) | Hydraulic device and method of detection and sealing of holes or cracks in oil well tubing | |
| WO2018032098A1 (en) | Blowout preventer with integrated flow tee, stuffing box bottom, and grease fitting | |
| AU2018222960B2 (en) | Apparatus and method for testing float equipment | |
| CN201651655U (en) | Hydraulic clamping pipe blocker for leaking stoppage under pressure | |
| RU2720714C1 (en) | Well head for pressure release |
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 |