CN214062930U - Sand prevention structure of underground test valve - Google Patents
Sand prevention structure of underground test valve Download PDFInfo
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- CN214062930U CN214062930U CN202023066551.8U CN202023066551U CN214062930U CN 214062930 U CN214062930 U CN 214062930U CN 202023066551 U CN202023066551 U CN 202023066551U CN 214062930 U CN214062930 U CN 214062930U
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Abstract
A sand prevention structure of an underground test valve comprises an outer connecting sleeve and an inner connecting joint, wherein the outer connecting sleeve is vertically arranged at the lower part of the test valve, and the inner connecting joint is arranged at the inner side of the outer connecting sleeve; the outer connecting sleeve is of a cylindrical structure, the upper end of an inner hole of the outer connecting sleeve is provided with an internal thread, and the internal thread of the outer connecting sleeve is matched and installed with the external thread of the lower joint of the test valve; the inner connecting joint is of a stepped circular tube structure, the upper part of the inner connecting joint is a small-diameter circular tube, and the lower part of the inner connecting joint is a large-diameter circular tube; the utility model provides a technical scheme has reached good effect: the sand control structure of the underground test valve is provided with a gap by the inner hole of the outer connecting sleeve and the outer diameter of the large-diameter circular pipe of the inner connecting joint, so that sand in an oil-gas medium is isolated to the outer side and cannot enter when the oil-gas medium can enter the test valve in the effective guarantee test, the test valve is prevented from being damaged, and the safe operation of the test valve is ensured.
Description
Technical Field
The utility model relates to a petrochemical industry equipment makes the field, concretely relates to test valve sand control structure in pit.
Background
Oil and natural gas are life lines of world economy, oil and natural gas wells are usually drilled with deep holes on the ground by a drilling machine, then the oil and natural gas are led out to the ground from the underground, after drilling is finished, testing equipment is usually required to be placed into the oil and gas wells to test the oil and gas wells, the traditional method is that a testing switch valve is arranged at the lower end of a testing pipe to lead oil and gas media into the testing pipe and then to the ground, but the existing testing valve quickly leads the oil and gas media into the testing pipe after being opened, and the oil and gas media usually contain a large amount of sand, so that a sealing element in the testing valve is very easy to damage, the testing valve cannot be closed after testing is finished, and great influence is caused on oil and gas operation in the later period; therefore, a novel structure is needed to solve the problem that the sand in the oil-gas medium in the existing oil-gas test process damages the test valve and cannot be closed to influence the operation in the later period.
SUMMERY OF THE UTILITY MODEL
The utility model provides a test valve sand control structure in pit for solve the problem that the operation that influences the later stage can't be closed to the test valve to the grit in the oil gas medium of current oil gas test in-process causes the damage.
The purpose of the utility model is realized by adopting the following technical scheme:
a sand prevention structure of an underground test valve comprises an outer connecting sleeve and an inner connecting joint, wherein the outer connecting sleeve is vertically arranged at the lower part of the test valve, and the inner connecting joint is arranged at the inner side of the outer connecting sleeve; the outer connecting sleeve is of a cylindrical structure, the upper end of an inner hole of the outer connecting sleeve is provided with an internal thread, and the internal thread of the outer connecting sleeve is matched and installed with the external thread of the lower joint of the test valve; the inner connecting joint is of a stepped circular tube structure, the upper part of the inner connecting joint is a small-diameter circular tube, and the lower part of the inner connecting joint is a large-diameter circular tube; the outer diameter of the large-diameter circular tube is larger than that of the small-diameter circular tube; the large-diameter circular tube and the small-diameter circular tube are coaxially arranged.
The middle part of the inner hole of the small-diameter circular tube is provided with a partition plate, the upper end of the inner hole of the small-diameter circular tube is provided with an upper connecting internal thread, and the lower outer circle of the small-diameter circular tube is uniformly provided with connecting through holes.
The upper end of the large-diameter circular pipe is in transition connection with the small-diameter circular pipe through an oblique angle, the lower end of the outer circle of the large-diameter circular pipe is provided with pipe threads, and the outer circle of the large-diameter circular pipe is in clearance fit with the lower inner hole of the outer connecting sleeve.
The size of the gap between the excircle of the large-diameter circular tube of the inner connecting joint and the inner hole of the outer connecting sleeve is 0.4-0.6 mm.
The connecting through holes of the small-diameter pipe are arranged in an upper layer and a lower layer, each layer of connecting through holes are arranged in a radial direction, the upper connecting through holes and the lower connecting through holes are arranged in a staggered mode, and 4-8 connecting through holes are arranged in each layer.
The length of the inner connecting joint is greater than that of the outer connecting sleeve.
The utility model provides a technical scheme has reached good effect: the sand control structure of the underground test valve is provided with a gap by the inner hole of the outer connecting sleeve and the outer diameter of the large-diameter circular pipe of the inner connecting joint, so that sand in an oil-gas medium is isolated to the outer side and cannot enter when the oil-gas medium can enter the test valve in the effective guarantee test, the test valve is prevented from being damaged, and the safe operation of the test valve is ensured.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
FIG. 2 is a schematic view of the interconnect joint of FIG. 1.
In the figure: 1. the device comprises an outer connecting sleeve, 2 parts of an inner connecting joint, 3 parts of a lower joint, 4 parts of a sampling inner mandrel, 2-1 parts of a large-diameter circular tube, 2-2 parts of a small-diameter circular tube, 2-3 parts of an upper connecting inner thread, 2-4 parts of a partition plate, 2-5 parts of a connecting through hole, 2-6 parts of a pipe thread.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings and the detailed description thereof:
the sand prevention structure of the underground test valve comprises an outer connecting sleeve 1 and an inner connecting joint 2, wherein the outer connecting sleeve 1 is vertically arranged at the lower part of the test valve, the outer connecting sleeve 1 is of a cylindrical structure, inner threads are arranged at the upper end of an inner hole of the outer connecting sleeve 1, and the inner threads of the outer connecting sleeve 1 are matched and installed with the outer threads of a lower connecting joint 3 of the test valve; the inner connecting joint 2 is arranged on the inner side of the outer connecting sleeve 1, the inner connecting joint 2 is of a stepped circular tube structure, the upper part is a small-diameter circular tube 2-2, and the lower part is a large-diameter circular tube 2-1; the middle part of an inner hole of the small-diameter circular tube 2-2 is provided with a partition plate 2-4, the upper end of the inner hole of the small-diameter circular tube 2-2 is provided with an upper connecting internal thread 2-3, and the outer circle of the lower part of the small-diameter circular tube 2-2 is uniformly provided with connecting through holes 2-5; the connecting through holes 2-5 of the small-diameter pipe are arranged in an upper layer and a lower layer, each layer of connecting through hole 2-5 is arranged in a radial direction, the connecting through holes 2-5 adjacent to each other in the upper layer and the lower layer are arranged in a staggered manner, and 4-8 connecting through holes 2-5 in each layer are arranged; the outer diameter of the large-diameter circular tube 2-1 is larger than that of the small-diameter circular tube 2-2; the large-diameter circular tube 2-1 and the small-diameter circular tube 2-2 are coaxially arranged; the upper end of the large-diameter circular tube 2-1 is in transition connection with the small-diameter circular tube 2-2 through an oblique angle, the lower end of the outer circle of the large-diameter circular tube 2-1 is provided with a tube thread 2-6, and the outer circle of the large-diameter circular tube 2-1 is in clearance fit with the inner hole at the lower part of the outer connecting sleeve 1; the size of the clearance between the excircle of the large-diameter circular tube 2-1 and the inner hole of the outer connecting sleeve 1 is 0.4-0.6 mm; the length of the inner connecting joint 2 is larger than that of the outer connecting sleeve 1.
When the underground test valve sand prevention structure is used, the underground test valve sand prevention structure is vertically and downwards installed at the lower end of a test valve, internal threads on the left side of an outer connecting sleeve 1 are connected with external thread heads of a lower connector 3 of the test valve, upper connecting internal threads 2-3 at the upper end of an inner hole of an inner connector 2 are connected with external threads on the lower part of a sampling inner mandrel 4 of the test valve, and finally other test devices are connected with pipe threads 2-6 at the lower end of a small-diameter pipe of the inner connector 2; during testing, the lower joint 3 of the test valve moves upwards under the pulling of a hydraulic element, the lower joint 3 pulls the outer connecting sleeve 1 to move upwards, an oil-gas medium enters from a gap between the outer connecting sleeve 1 and the inner connecting sleeve 2, sand in the oil-gas medium is blocked by the gap and cannot enter, and the oil-gas medium enters the test valve through a gap between an inner hole of the lower joint 3 and the sampling inner mandrel 4 and flows out from the upper part; the effective operation of the underground test valve in the oil well is ensured.
The part of the utility model not detailed is prior art.
Claims (6)
1. The utility model provides a test valve sand control structure in pit, includes outer connecting sleeve (1) and inner connector (2), characterized by: the outer connecting sleeve (1) is vertically arranged at the lower part of the test valve, and the inner connecting joint (2) is arranged at the inner side of the outer connecting sleeve (1); the outer connecting sleeve (1) is of a cylindrical structure, an internal thread is arranged at the upper end of an inner hole of the outer connecting sleeve (1), and the internal thread of the outer connecting sleeve (1) is matched and installed with the external thread of the lower joint (3) of the test valve; the inner connecting joint (2) is of a stepped circular tube structure, the upper part is a small-diameter circular tube (2-2), and the lower part is a large-diameter circular tube (2-1); the outer diameter of the large-diameter circular tube (2-1) is larger than that of the small-diameter circular tube (2-2); the large-diameter circular tube (2-1) and the small-diameter circular tube (2-2) are coaxially arranged.
2. The sand control structure of the downhole test valve of claim 1, wherein: the middle part of an inner hole of the small-diameter circular pipe (2-2) is provided with a partition plate (2-4), the upper end of the inner hole of the small-diameter circular pipe (2-2) is provided with an upper connecting internal thread (2-3), and the excircle of the lower part of the small-diameter circular pipe (2-2) is uniformly provided with connecting through holes (2-5).
3. The sand control structure of the downhole test valve of claim 1, wherein: the upper end of the large-diameter circular tube (2-1) is in transition connection with the small-diameter circular tube (2-2) through an oblique angle, the lower end of the outer circle of the large-diameter circular tube (2-1) is provided with a tube thread (2-6), and the outer circle of the large-diameter circular tube (2-1) is in clearance fit with the inner hole in the lower portion of the outer connecting sleeve (1).
4. The sand control structure of the downhole test valve of claim 1, wherein: the gap size between the excircle of the large-diameter circular tube (2-1) of the inner connecting joint (2) and the inner hole of the outer connecting sleeve (1) is 0.4-0.6 mm.
5. The sand control structure of the downhole test valve of claim 2, wherein: the connecting through holes (2-5) of the small-diameter pipe are arranged in an upper-lower layered mode, each layer of connecting through holes (2-5) are arranged in a radial mode, the connecting through holes (2-5) adjacent to each other in the upper-lower layered mode are arranged in a staggered mode, and 4-8 connecting through holes (2-5) are arranged in each layer.
6. The sand control structure of the downhole test valve of claim 1, wherein: the length of the inner connecting joint (2) is greater than that of the outer connecting sleeve (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023066551.8U CN214062930U (en) | 2020-12-18 | 2020-12-18 | Sand prevention structure of underground test valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023066551.8U CN214062930U (en) | 2020-12-18 | 2020-12-18 | Sand prevention structure of underground test valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214062930U true CN214062930U (en) | 2021-08-27 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023066551.8U Active CN214062930U (en) | 2020-12-18 | 2020-12-18 | Sand prevention structure of underground test valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214062930U (en) |
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2020
- 2020-12-18 CN CN202023066551.8U patent/CN214062930U/en active Active
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