CN210714679U - Oil well casing integrity test evaluation device - Google Patents
Oil well casing integrity test evaluation device Download PDFInfo
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- CN210714679U CN210714679U CN201921219774.8U CN201921219774U CN210714679U CN 210714679 U CN210714679 U CN 210714679U CN 201921219774 U CN201921219774 U CN 201921219774U CN 210714679 U CN210714679 U CN 210714679U
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- 239000003129 oil well Substances 0.000 title claims abstract description 64
- 238000012360 testing method Methods 0.000 title claims abstract description 61
- 210000002445 nipple Anatomy 0.000 claims abstract description 59
- 239000012530 fluid Substances 0.000 claims abstract description 23
- 239000007788 liquid Substances 0.000 claims description 23
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 20
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 20
- 241001330002 Bambuseae Species 0.000 claims description 20
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 20
- 239000011425 bamboo Substances 0.000 claims description 20
- 230000015572 biosynthetic process Effects 0.000 abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 9
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- 238000012854 evaluation process Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
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- 101100008047 Caenorhabditis elegans cut-3 gene Proteins 0.000 description 1
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- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- 238000011105 stabilization Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
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Abstract
The utility model provides an oil well casing integrality test evaluation device, including the oil pipe nipple joint, the pressure gauge has been packaged in the oil pipe nipple joint fluid passage, and the slot has been seted up to the pipe wall of oil pipe nipple joint, the slot is just to the pressure gauge. Two oil well casing integrity test evaluation devices are connected in series on a tubing string of a lower casing and are respectively positioned above and below a packer, the oil well casing integrity test evaluation device above can measure the annular pressure of an oil casing, the oil well casing integrity test evaluation device below is used for measuring the formation pressure, the integrity of the oil well casing can be further evaluated and tested by comparing the annular pressure of the oil casing with the formation pressure and the pressure change condition, and whether the oil well is broken or not, the water yield of a broken sleeve point and the like are judged.
Description
Technical Field
The utility model belongs to the technical field of oil well equipment detection device, concretely relates to oil well casing pipe integrality test evaluation device.
Background
The problem of oil well casing breakage is increasingly serious, and the yield loss after the oil well casing breakage is serious. How to conveniently and rapidly evaluate the integrity of the casing, and meanwhile, judging the water breakthrough reason of the oil well still remains the direction of continuous attack and customs research, and the currently used engineering well logging evaluation method has higher cost and cannot be developed on a large scale; the dynamic identification method has large limitation and cannot accurately judge the reason of water.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides an oil well casing integrity test evaluation device, which aims to solve the problems that the existing engineering well logging method has higher cost and cannot be developed on a large scale; the second purpose is to solve the problem that the existing dynamic identification method is large in limitation.
For solving the technical problem, the utility model provides an oil well casing integrality test evaluation device, including the oil pipe nipple joint, the pressure gauge has been packaged with in the oil pipe nipple joint fluid passage, and the slot has been seted up to the pipe wall of oil pipe nipple joint, the slot is just to the pressure gauge.
Furthermore, a cylinder for accommodating the pressure gauge is axially fixed in the fluid channel of the oil pipe nipple, two ends of the cylinder are sealed, the cylinder wall of the cylinder is attached to the inner wall of the oil pipe nipple, a through hole consistent with the opening of the slot is formed in the position, right opposite to the slot, of the cylinder wall of the attached part of the cylinder, and the through hole and the slot are overlapped to form a liquid passing channel.
Preferably, one end of the cylinder is closed, and the other end of the cylinder is hermetically screwed with a plug.
Furthermore, the outer cylinder wall of the cylinder is hooped with at least one supporting rod for fixing the cylinder, two ends of the supporting rod are fixedly connected to the inner wall of the oil pipe nipple, and the rod body of the supporting rod is hooped with the cylinder.
Preferably, a C-shaped cylinder is axially fixed in the fluid passage of the oil pipe nipple, two ends of the C-shaped cylinder are closed, the C-shaped cylinder is hermetically attached to the inner wall of the oil pipe nipple along the opening side of the length direction, a cavity for accommodating the pressure gauge is formed by the inner wall of the oil pipe nipple and the inner wall of the C-shaped cylinder, and a liquid passing passage is formed by a superposed part of a slot of the oil pipe nipple and the opening side of the C-shaped cylinder along the length direction.
Furthermore, one end of the C-shaped cylinder is closed, and the other end of the C-shaped cylinder is hermetically screwed with a plug.
Preferably, the outer cylinder wall of the C-shaped cylinder is hooped with at least one supporting rod for fixing the C-shaped cylinder, two ends of the supporting rod are fixedly connected to the inner wall of the oil pipe nipple, and the rod body of the supporting rod hoops the C-shaped cylinder.
The utility model has the advantages as follows:
two oil well casing integrity test evaluation devices are connected in series on a tubing string of a lower casing and are respectively positioned above and below a packer, the oil well casing integrity test evaluation device above can measure the annular pressure of an oil casing, the oil well casing integrity test evaluation device below is used for measuring the formation pressure, the integrity of the oil well casing can be further evaluated and tested by comparing the annular pressure of the oil casing with the formation pressure and the pressure change condition, and whether the oil well is broken or not, the water yield of a broken sleeve point and the like are judged.
In order to make the above and other objects of the present invention more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
FIG. 1 is a schematic diagram of the structure of an evaluation device for an integrity test of an oil well casing.
FIG. 2 is a schematic diagram of the application installation of the well casing integrity test evaluation device.
Description of reference numerals:
1. an oil pipe nipple; 2. a pressure gauge; 3. slotting; 4. a liquid passing channel; 5. a plug; 6. a support bar; 7. an oil well casing integrity test evaluation device; 8. and (4) a packer.
Detailed Description
The following description is provided for illustrative embodiments of the present invention, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein.
It should be noted that, in the present invention, the upper, lower, left, and right in the drawings are regarded as the upper, lower, left, and right of the oil well casing integrity test evaluation device described in this specification.
The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, which, however, may be embodied in many different forms and are not limited to the embodiments described herein, which are provided for complete and complete disclosure of the present invention and to fully convey the scope of the invention to those skilled in the art. The terminology used in the exemplary embodiments presented in the accompanying drawings is not intended to be limiting of the invention. In the drawings, the same units/elements are denoted by the same reference numerals.
Unless otherwise defined, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Further, it will be understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
First embodiment
Referring to fig. 1, the utility model discloses a first embodiment relates to an oil well casing integrality test evaluation device, including oil pipe nipple joint 1, the pressure gauge 2 has been packaged in the 1 fluid passage of oil pipe nipple joint, and slot 3 has been seted up to the pipe wall of oil pipe nipple joint 1, slot 3 is just to pressure gauge 2.
The working process of the oil well casing integrity test evaluation device protected by the embodiment is as follows:
assembling two oil well casing integrity test evaluation devices according to the structure of the oil well casing integrity test evaluation device, connecting the two oil well casing integrity test evaluation devices in series to a tubing string at a certain distance respectively, then lowering the tubing string into a well, and pressurizing an oil casing annulus, wherein as shown in fig. 2, the oil well casing integrity test evaluation device 7 at the upper part is positioned above a packer 8 (is separated from the packer 8 by an oil pipe) and is used for measuring the pressure of the oil casing annulus; the lower well casing integrity test and evaluation device 7 is located at a deep position in the oil layer and is used for measuring the formation pressure.
Pressure gauge in the oil well casing integrity test evaluation device is when measuring oil jacket annular space pressure and formation pressure, oil jacket annular space pressure and formation pressure have also been stored, after the measurement is accomplished, play out the oil string, oil well casing integrity test evaluation device is pulled down, take out pressure gauge 2, record oil jacket annular space pressure value and formation pressure value, compare oil jacket annular space pressure value and formation pressure value, and respective pressure variation condition (rise/fall/steady voltage), further evaluate the integrality of oil well casing, the broken and water condition of analysis oil well casing, concrete evaluation process is as follows:
firstly, the evaluation device provided by the embodiment is adopted to test a perfect casing, the annulus of the oil casing is pressurized, the air pressure value of the oil casing measured by the oil casing integrity test evaluation device 7 (hereinafter referred to as an upper evaluation device) above the packer 8 and the formation pressure value measured by the oil casing integrity test evaluation device 7 (hereinafter referred to as a lower evaluation device) below the packer 8 are recorded, and a pressure-time curve is drawn, so that the pressure measured by the lower evaluation device stably rises after pressurization and pump stopping, the pressure measured by the upper evaluation device rises after pressurization and is stable after pump stopping, and the condition that the packer 8 is well seated and the casing has no leakage point is indicated;
then, the evaluation device provided by the embodiment is adopted to test a suspected casing broken well, the annulus of the oil casing is pressurized, the pressure value of the annulus of the oil casing measured by the upper evaluation device and the formation pressure value measured by the lower evaluation device are recorded, a pressure-time curve is drawn, if the pressure value occurs, the pressure measured by the lower evaluation device stably rises after pressurization and pump stop, the pressure measured by the upper evaluation device rises after pressurization, and the pressure measured by the upper evaluation device obviously drops after pump stop, so that the packer 8 is well seated, but a casing pipe has a broken leakage point; if the pressure is increased, the pressure measured by the upper evaluation device and the pressure measured by the lower evaluation device both increase, and the pressure decreases after the pump is stopped, so that the setting of the packer 8 is failed, and whether a leakage point exists in the casing can not be judged.
Specifically, the working principle of the oil well casing integrity test evaluation device protected by the embodiment is as follows:
when the oil sleeve annulus is pressurized, fluid in the oil sleeve annulus extrudes the pressure gauge 2 through the slot 3, and the pressure gauge 2 measures and records the received pressure (the oil sleeve annulus pressure or the formation pressure).
It should be noted that in the embodiment, the oil pipe nipple 1 is modified, the pressure gauge 2 is packaged firstly, the purpose of packaging is to isolate the pressure gauge 2 from the liquid in the fluid passage of the oil pipe nipple 1, and the liquid in the fluid passage of the oil pipe nipple 1 is prevented from contacting the pressure gauge 2, so that the upper oil sleeve of the packer is communicated, and the test result is interfered; and secondly, a cutting seam 3 is formed in the pipe wall of the oil pipe nipple 1, and the cutting seam 3 is used for communicating the pressure gauge 2 with the annular space of the casing pipe and measuring the pressure recovery condition of the hollow part of the oil sleeve.
Second embodiment
Referring to fig. 1, the utility model discloses a first embodiment relates to an oil well casing integrality test evaluation device, including oil pipe nipple joint 1, the pressure gauge 2 has been packaged in the 1 fluid passage of oil pipe nipple joint, and slot 3 has been seted up to the pipe wall of oil pipe nipple joint 1, slot 3 is just to pressure gauge 2.
Specifically, a cylinder for accommodating the pressure gauge 2 is axially fixed in the fluid channel of the oil pipe nipple 1, two ends of the cylinder are sealed, the cylinder wall of the cylinder is attached to the inner wall of the oil pipe nipple 1, a through hole with the opening consistent with that of the slot 3 is formed in the position, facing the slot 3, of the cylinder wall of the attached cylinder, and the through hole and the slot 3 are overlapped to form a liquid passing channel 4.
Furthermore, one end of the cylinder is closed, and the other end of the cylinder is hermetically screwed with a plug 5; the outer cylinder wall of the cylinder is hooped with at least one supporting rod 6 used for fixing the cylinder, two ends of the supporting rod 6 are fixedly connected to the inner wall of the oil pipe nipple 1, and the rod body of the supporting rod 6 is hooped with the cylinder.
The working process of the oil well casing integrity test evaluation device protected by the embodiment is as follows:
assembling two oil well casing integrity test evaluation devices according to the structure of the oil well casing integrity test evaluation device, connecting the two oil well casing integrity test evaluation devices in series to a tubing string at a certain distance respectively, then lowering the tubing string into a well, and pressurizing an oil casing annulus, wherein as shown in fig. 2, the oil well casing integrity test evaluation device 7 at the upper part is positioned above a packer 8 (is separated from the packer 8 by an oil pipe) and is used for measuring the pressure of the oil casing annulus; the lower well casing integrity test and evaluation device 7 is located at a deep position in the oil layer and is used for measuring the formation pressure.
The pressure gauge in the oil well casing integrity test evaluation device also stores the oil casing annulus pressure and the formation pressure while measuring the oil casing annulus pressure and the formation pressure, after the measurement is completed, the oil string is taken out, the oil well casing integrity test evaluation device is detached, the pressure gauge 2 is taken out, the oil casing annulus pressure value and the formation pressure value are recorded, the oil casing annulus pressure value and the formation pressure value are compared, and respective pressure change conditions (ascending/descending/pressure stabilizing) are obtained, the integrity of the oil well casing is further evaluated, the oil well casing breakage and water outlet conditions are analyzed, whether the oil well casing breakage and the casing breakage point water outlet conditions are judged, and the integrity of the oil well casing is evaluated and tested.
Specifically, the working principle of the oil well casing integrity test evaluation device protected by the embodiment is as follows:
when the oil sleeve annulus is pressurized, fluid in the oil sleeve annulus enters the cylinder through the liquid passing channel 4, the pressure gauge 2 in the cylinder is squeezed, and the pressure gauge 2 measures and records the received pressure (the oil sleeve annulus pressure or the formation pressure).
Different from the first embodiment, this embodiment has set up a drum in the fluid passage of oil pipe nipple joint 1, and the stack shell of this drum is laminated in the inner wall of oil pipe nipple joint 1 along its length direction, because the both ends of this drum are sealed, consequently pressure gauge 2 in the drum can not contact with the fluid in the oil pipe nipple joint 1, when suppressing the oil jacket annular space, the interior liquid stream of oil jacket annular space gets into the drum through fluid passage 4 in, pressure gauge 2 in the extrusion drum.
Because when suppressing, the liquid in the oil jacket annular space has certain pressure, and the collision pressurization is when pressure gauge 2, can high-pressure impact pressure gauge 2, and the production removes, for fixed pressure gauge 2, this embodiment connects the inner wall in oil pipe nipple joint 1 with the drum hoop through bracing piece 6, and bracing piece 6 is used for fixing the drum, and pressure gauge 2 in protection drum and the drum is not beaten by the high pressure.
Further, in order to conveniently detach and take out the pressure gauge 2 and isolate the liquid in the casing and the oil pipe nipple 1, the plug 5 is arranged at the position of the cylinder close to the orifice of the oil pipe nipple 1, and the plug 5 is screwed on the end part of the cylinder to play the roles of sealing and preventing the liquid from streaming.
It should be noted that, since the through hole of the cylinder coincides with the slit 3 to form the liquid passing passage 4, the slit 3 and the liquid passing passage 4 are identified at the same position in fig. 1.
Third embodiment
Referring to fig. 1, the utility model discloses a first embodiment relates to an oil well casing integrality test evaluation device, including oil pipe nipple joint 1, the pressure gauge 2 has been packaged in the 1 fluid passage of oil pipe nipple joint, and slot 3 has been seted up to the pipe wall of oil pipe nipple joint 1, slot 3 is just to pressure gauge 2.
Specifically, in the fluid passage of oil pipe nipple 1, along the axial fixity have a C shape section of thick bamboo, the both ends of a C shape section of thick bamboo are sealed, a C shape section of thick bamboo along length direction's opening side sealed laminate in oil pipe nipple 1's inner wall, oil pipe nipple 1's inner wall and the inner wall of a C shape section of thick bamboo form the cavity that holds pressure gauge 2, the portion of coincidence of the cut 3 of oil pipe nipple 1 and the C shape section of thick bamboo along length direction's opening side forms cross liquid passageway 4.
Furthermore, one end of the C-shaped cylinder is closed, and the other end of the C-shaped cylinder is hermetically screwed with a plug 5; the outer barrel wall of the C-shaped barrel is hooped with at least one supporting rod 6 used for fixing the C-shaped barrel, the two ends of the supporting rod 6 are fixedly connected to the inner wall of the oil pipe nipple 1, and the rod body of the supporting rod 6 is hooped with the C-shaped barrel.
In order to clearly show the structure and positional relationship of the respective components of the evaluation apparatus, fig. 1 is a structural view of a visible stopper 5 in which a C-shaped tube or a cylinder is drawn outward.
The working process of the oil well casing integrity test evaluation device protected by the embodiment is as follows:
as shown in fig. 2, according to the structure of the oil well casing integrity test evaluation device, assembling two oil well casing integrity test evaluation devices, connecting the two oil well casing integrity test evaluation devices in series to a tubing string at a certain distance, then lowering the tubing string into the well, and pressurizing an oil casing annulus, so that the upper oil well casing integrity test evaluation device 7 is positioned above a packer 8 (one tubing is away from the packer 8) and is used for measuring the pressure of the oil casing annulus; the lower well casing integrity test and evaluation device 7 is located at a deep position in the oil layer and is used for measuring the formation pressure.
The pressure gauge in the oil well casing integrity test evaluation device also stores the oil casing annulus pressure and the formation pressure while measuring the oil casing annulus pressure and the formation pressure, after the measurement is completed, the oil string is taken out, the oil well casing integrity test evaluation device is detached, the pressure gauge 2 is taken out, the oil casing annulus pressure value and the formation pressure value are recorded, the oil casing annulus pressure value and the formation pressure value are compared with the respective pressure change conditions (ascending/descending/pressure stabilization), the integrity of the oil well casing is further evaluated, the oil well casing breakage and water outlet conditions are analyzed, the specific evaluation process or method is a conventional technology in the field, and is not used as a protection point of the embodiment, and detailed description is not provided herein.
Specifically, the working principle of the oil well casing integrity test evaluation device protected by the embodiment is as follows:
when the oil sleeve annulus is pressurized, fluid in the oil sleeve annulus enters the C-shaped cylinder through the liquid passing channel 4 to extrude the pressure gauge 2 in the C-shaped cylinder, and the pressure gauge 2 measures and records the received pressure (the oil sleeve annulus pressure or the formation pressure).
Different from the first embodiment, this embodiment has set up a C shape section of thick bamboo in the fluid passage of oil pipe nipple joint 1, and the stack shell of this C shape section of thick bamboo is along length direction's opening laminating in the inner wall of oil pipe nipple joint 1, because the both ends of this C shape section of thick bamboo are sealed, consequently pressure gauge 2 in the C shape section of thick bamboo can not contact with the fluid in the oil pipe nipple joint 1, when suppressing the oil jacket annular space, the interior liquid stream of oil jacket annular space gets into the C shape section of thick bamboo through fluid passage 4 in, pressure gauge 2 in the extrusion C shape section of thick bamboo.
Because when suppressing, the liquid in the oil jacket annular space has certain pressure, and the collision pressurization is when pressure gauge 2, can high-pressure impact pressure gauge 2, and the production removes, for fixed pressure gauge 2, this embodiment hoops C shape section of thick bamboo in the inner wall of oil pipe nipple joint 1 through bracing piece 6, and bracing piece 6 is used for fixed C shape section of thick bamboo, and pressure gauge 2 in protection C shape section of thick bamboo and the C shape section of thick bamboo is not beaten by the high pressure.
Furthermore, in order to conveniently detach and take out the pressure gauge 2, the liquid in the casing and the oil pipe nipple 1 is isolated, a plug 5 is arranged at a position close to the pipe orifice of the oil pipe nipple 1, and the plug 5 is rotatably connected to the end part of the C-shaped cylinder to play a role in sealing and preventing liquid streaming.
It should be noted that, since the side opening of the C-shaped cylinder coincides with the slit 3 to form the liquid passing passage 4, the slit 3 and the liquid passing passage 4 are identified at the same position in fig. 1.
To sum up, the present embodiment specifically includes: two oil well casing integrity test evaluation devices are connected in series on a tubing string of a lower casing and are respectively positioned above and below a packer, the oil well casing integrity test evaluation device above can measure the annular pressure of an oil casing, the oil well casing integrity test evaluation device below is used for measuring the formation pressure, the integrity of the oil well casing can be further evaluated and tested by comparing the annular pressure of the oil casing with the formation pressure and the pressure change condition, and whether the oil well is broken or not, the water yield of a broken sleeve point and the like are judged.
It will be understood by those skilled in the art that the foregoing embodiments are specific examples of the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in its practical application.
Claims (7)
1. The utility model provides an oil well casing integrality test evaluation device, includes oil pipe nipple joint (1), its characterized in that: pressure gauge (2) are packaged in the fluid passage of oil pipe nipple joint (1), and slot (3) have been seted up to the pipe wall of oil pipe nipple joint (1), slot (3) are just to pressure gauge (2).
2. The well casing integrity test evaluation device of claim 1, wherein: a cylinder for accommodating the pressure gauge (2) is axially fixed in the fluid channel of the oil pipe nipple (1), two ends of the cylinder are closed, the cylinder wall of the cylinder is attached to the inner wall of the oil pipe nipple (1), a through hole with the opening consistent with that of the slit (3) is formed in the position, right opposite to the slit (3), of the cylinder wall of the attached part, and the through hole and the slit (3) are overlapped to form a liquid passing channel (4).
3. The well casing integrity test evaluation device of claim 2, wherein: one end of the cylinder is closed, and the other end of the cylinder is hermetically screwed with a plug (5).
4. The well casing integrity test evaluation device of claim 3, wherein: the outer cylinder wall of the cylinder is hooped with at least one supporting rod (6) used for fixing the cylinder, the two ends of the supporting rod (6) are fixedly connected to the inner wall of the oil pipe nipple (1), and the rod body of the supporting rod (6) is hooped with the cylinder.
5. The well casing integrity test evaluation device of claim 1, wherein: in the fluid passage of oil pipe nipple joint (1), there is a C shape section of thick bamboo along the axial fixity, the both ends of a C shape section of thick bamboo are sealed, and a C shape section of thick bamboo seals along length direction's opening side and fits in the inner wall of oil pipe nipple joint (1), the inner wall of oil pipe nipple joint (1) and the inner wall of a C shape section of thick bamboo form the cavity that holds pressure gauge (2), liquid passageway (4) are crossed to cut (3) of oil pipe nipple joint (1) and the coincidence of a C shape section of thick bamboo along length direction's opening side.
6. The well casing integrity test evaluation device of claim 5, wherein: one end of the C-shaped cylinder is closed, and the other end of the C-shaped cylinder is hermetically screwed with a plug (5).
7. The well casing integrity test evaluation device of claim 6, wherein: the outer barrel wall of the C-shaped barrel is hooped with at least one supporting rod (6) used for fixing the C-shaped barrel, the two ends of the supporting rod (6) are fixedly connected to the inner wall of the oil pipe nipple (1), and the rod body of the supporting rod (6) is hooped with the C-shaped barrel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921219774.8U CN210714679U (en) | 2019-07-31 | 2019-07-31 | Oil well casing integrity test evaluation device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921219774.8U CN210714679U (en) | 2019-07-31 | 2019-07-31 | Oil well casing integrity test evaluation device |
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| CN210714679U true CN210714679U (en) | 2020-06-09 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111735573A (en) * | 2020-07-09 | 2020-10-02 | 李超 | Oil gas well casing reliability evaluation device |
| CN112343584A (en) * | 2020-11-03 | 2021-02-09 | 中国石油天然气股份有限公司 | Pressure working barrel for external channeling of horizontal well inspection pipe and verification method thereof |
| CN112727397A (en) * | 2021-01-05 | 2021-04-30 | 西南石油大学 | Method for repairing casing damage by using temperature response type sealing agent |
-
2019
- 2019-07-31 CN CN201921219774.8U patent/CN210714679U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111735573A (en) * | 2020-07-09 | 2020-10-02 | 李超 | Oil gas well casing reliability evaluation device |
| CN112343584A (en) * | 2020-11-03 | 2021-02-09 | 中国石油天然气股份有限公司 | Pressure working barrel for external channeling of horizontal well inspection pipe and verification method thereof |
| CN112727397A (en) * | 2021-01-05 | 2021-04-30 | 西南石油大学 | Method for repairing casing damage by using temperature response type sealing agent |
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