CN212428783U - Two-stage separation efficient sand setting gas anchor - Google Patents
Two-stage separation efficient sand setting gas anchor Download PDFInfo
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- CN212428783U CN212428783U CN202023254434.4U CN202023254434U CN212428783U CN 212428783 U CN212428783 U CN 212428783U CN 202023254434 U CN202023254434 U CN 202023254434U CN 212428783 U CN212428783 U CN 212428783U
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Abstract
The utility model discloses a two-stage separated high-efficiency sand setting gas anchor, which relates to the technical field of oil field downhole equipment, and comprises an upper joint, a lower joint, an outer sleeve, a separation pipe, an upper spiral, a lower spiral and a one-way valve, wherein the upper joint is detachably connected with the upper end of the outer sleeve, the lower joint is detachably connected with the lower end of the outer sleeve, the separation pipe is arranged in the outer sleeve, and the upper end of the separation pipe is detachably connected with the upper joint; the pipe wall of the upper part of the outer sleeve is provided with a plurality of sieve pores, the pipe wall of the lower part of the separating pipe is provided with a plurality of oil inlets, and the upper spiral and the lower spiral are fixedly arranged on the outer wall of the separating pipe and are arranged in parallel up and down; a filter screen is arranged in the inner cavity of the separation pipe, and the one-way valve is fixedly arranged at the lower end of the separation pipe; the device has a novel, simple and reliable structure, adopts the principle of separation of spiral separation and slippage effect, realizes the effect of two-stage separation of liquid flow in the pipe, and can prevent well flushing liquid from being injected into stratum to play a role in oil layer protection when a well is flushed.
Description
Technical Field
The utility model relates to an oil field downhole equipment technical field, concretely relates to high-efficient sand setting gas anchor of two-stage separation.
Background
After the oil field enters the middle and later development, along with the exploitation of the oil well, because the formation pressure is reduced, the dissolved gas in the crude oil is easy to separate out too early, so that the filling degree of the oil well pump is reduced, the pump efficiency is reduced, and even air lock is caused. In addition, due to factors such as loose stratum cementation and overlarge production pressure difference, sand is produced from the stratum, so that the abrasion of an oil well pump is aggravated, the pump is blocked, and the normal production of an oil well is influenced. Practice has shown that the larger the gas-oil ratio of an oil well, the more severe the sand production from the formation. In order to solve the problems, a first-stage gas anchor or sand anchor which is separated by utilizing the slippage effect and the gravity is usually arranged below a pump in each oil field to carry out simple separation so as to prevent gas and sand from entering the pump. Although having a certain effect, the oil well with serious gas and sand has poor effect from the field application condition; although the multistage separation type gas and sand anchor produced abroad has good use effect, the structure is complex, the production cost is high, and the range of practical application is limited.
In view of the above problems, there is an urgent need to develop a sand setting gas anchor with a simple structure and an excellent gas-sand separation effect.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a high-efficient sand setting gas anchor of two-stage separation to the defect that prior art exists.
The technical scheme of the utility model is that: a two-stage separated high-efficiency sand setting gas anchor comprises an upper joint, a lower joint, an outer sleeve, a separation pipe, an upper spiral, a lower spiral and a one-way valve, wherein the upper joint is detachably connected with the upper end of the outer sleeve, the lower joint is detachably connected with the lower end of the outer sleeve, the separation pipe is arranged in the outer sleeve, and the upper end of the separation pipe is detachably connected with the upper joint; the upper part of the outer sleeve is provided with a plurality of sieve holes, the lower part of the outer sleeve is provided with a plurality of oil inlets, and the upper spiral and the lower spiral are fixedly arranged on the outer wall of the separating pipe and are arranged in parallel up and down;
the check valve is fixedly installed at the lower end of the separation pipe and comprises a valve body, a valve core, a spring and an end cover, the valve core is movably arranged in an inner cavity of the valve body, the end cover is installed at the bottom of the valve body, a sand discharge port is formed in the end cover, the spring is located between the valve core and the end cover, one end of the spring is fixed to the bottom of the valve core, and the other end of the spring is fixed to the end cover.
Preferably, a gap is left between the joints of the upper spiral and the lower spiral and the separation pipe.
Preferably, the upper spiral is opposite to the lower spiral in spiral direction.
Preferably, the width of the gap between the upper spiral and the inner wall of the outer sleeve is 1mm-2 mm.
Preferably, a filter screen is arranged in an inner cavity of the separation pipe and is positioned above the oil inlet.
Preferably, four rows of sieve holes are arranged on the pipe wall of the upper part of the outer sleeve in a circumferential array, and each row comprises three sieve holes.
Compared with the prior art, the utility model, have following advantage:
the device has a novel, simple and reliable structure, adopts the principle of separation of spiral separation and slippage effect, realizes the two-stage separation effect of liquid flow in the pipe, and can prevent flushing liquid from being injected into stratum to play a role of oil layer protection during well flushing;
the device adopts the upper and lower sections of spiral sheets with different directions to carry out spiral separation, so that the rotary motion direction of well fluid is changed once, and the spiral separation effect of the sand setting gas anchor is greatly improved;
the filter screen in the device is matched with the one-way valve, so that fine sand can be blocked, the fine sand can be smoothly discharged, the damage of sand to the oil well pump is reduced, and the normal production of the oil well is facilitated.
Drawings
FIG. 1 is a schematic half-sectional view of the present invention;
fig. 2 is a partial enlarged view of a point a of the present invention.
In the figure: 1. the device comprises an upper joint, a lower joint, a valve core, a valve body, a valve core, a spring, an end cover, 705, a sand discharge port, 8 and a filter screen, wherein the upper joint is 2, the lower joint is 3, an outer sleeve is 301, a sieve hole is 4, a separating pipe is 401, an oil inlet is 5, an upper spiral is 6, a lower spiral is 7, the check valve is 701, the valve body is 702, the valve core is 703, the spring is 704.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
Example one
Referring to fig. 1, the two-stage separated high-efficiency sand setting gas anchor comprises an upper connector 1, a lower connector 2, an outer sleeve 3, a separation pipe 4, an upper spiral 5, a lower spiral 6 and a one-way valve 7, wherein the upper connector 1 is detachably connected with the upper end of the outer sleeve 3, the lower connector 2 is detachably connected with the lower end of the outer sleeve 3, the separation pipe 4 is arranged in the outer sleeve 3, and the upper end of the separation pipe is detachably connected with the upper connector 1; four rows of sieve holes 301 which are arranged in a circumferential array are arranged on the upper pipe wall of the outer sleeve 3, and each row comprises three sieve holes 301; the lower pipe wall of the separation pipe 4 is provided with a plurality of oil inlets 401, the upper spiral 5 and the lower spiral 6 are fixedly arranged on the outer wall of the separation pipe 4 and are arranged in parallel up and down, and the spiral directions of the upper spiral 5 and the lower spiral 6 are opposite.
Referring to fig. 2, the check valve 7 is fixedly installed at the lower end of the separation pipe 4, the check valve 7 includes a valve body 701, a valve core 702, a spring 703 and an end cover 704, the valve core 702 is movably arranged in the inner cavity of the valve body 701, the end cover 704 is installed at the bottom of the valve body 701, the end cover 704 is provided with a sand discharge port 705, the spring 703 is located between the valve core 702 and the end cover 704, one end of the spring is fixed at the bottom of the valve core 702, and the other end of.
When the device is used, the device is arranged below an oil well pump through the upper connector 1, the oil pumping plunger moves upwards, negative pressure is formed between the separation pipe 4 and the outer sleeve 3, mixed liquid in the well enters through the sieve pore 301 on the upper part of the outer sleeve 3, the mixed liquid firstly makes spiral rotary motion downwards along the upper spiral 5 and then makes reverse spiral rotary motion downwards along the lower spiral 6; at the moment, bubbles in the mixed liquid float upwards along the outer wall of the separation pipe 4 under the action of spiral centrifugal force and gravity differentiation, and are discharged into the annular space of the sleeve pipe and the oil pipe through four rows of sieve holes 301 on the outer sleeve 3 during the down stroke of the plunger, and sand grains sink into a tail pipe under the pump under the action of centrifugal force and gravity to realize primary separation; the separated mixed liquid enters the inner cavity of the separation pipe 4 through the oil inlet 401 at the lower part of the separation pipe 4, part of fine sand in the mixed liquid can be deposited on the one-way valve 7, and the valve core 702 is pressed to move the one-way valve 7 downwards to open and discharge the fine sand during the downward stroke of the plunger; and finally, pumping the mixed liquid in the well separated by gas and sand by an oil pump.
The device has a novel, simple and reliable structure, adopts the principle of separation of spiral separation and slippage effect to separate gas and sand in the pipe by liquid flow, and can prevent flushing fluid from being injected into stratum to play a role in protecting oil layer during well flushing; the spiral separation is carried out by the upper section of spiral sheet and the lower section of spiral sheet with different directions, so that the rotary motion direction of well fluid is changed once, and the spiral separation effect of the sand setting gas anchor is greatly improved.
Example two
As an embodiment of the present invention, the present embodiment adds the filter screen 8 in the separation tube 4 on the basis of the first embodiment, specifically, the inner cavity of the separation tube 4 is provided with the filter screen 8, and the filter screen 8 is located above the oil inlet 401.
When the separating device is used, mixed liquid after primary separation enters an inner cavity of the separating tube 4 through the oil inlet 401 at the lower part of the separating tube 4, fine sand can be filtered by the filter screen 8 in the inner cavity of the separating tube 4, the fine sand sinks onto the one-way valve 7, the valve core 702 is pressed to move the one-way valve 7 downwards to open the one-way valve 7 to discharge the fine sand during plunger downstroke, and secondary separation is realized.
The device adopts the spiral sheet and the filter screen 8 to fully separate mixed liquid in the well, so that the well liquid realizes the effect of two-stage separation in the sand setting gas anchor; the filter screen 8 in the device is matched with the one-way valve 7, so that fine sand can be blocked, the fine sand can be smoothly discharged, the damage of sand to the oil well pump is reduced, and the normal production of the oil well is facilitated.
EXAMPLE III
As a preferred embodiment of the present invention, this embodiment optimizes the structure of the upper spiral 5 and the lower spiral 6 on the basis of the second embodiment, specifically, the joints between the upper spiral 5 and the lower spiral 6 and the separation tube 4 are left with gaps, and the width of the gap between the upper spiral 5 and the inner wall of the outer sleeve 3 and the width of the gap between the lower spiral 6 and the inner wall of the outer sleeve 5 are 1mm-2 mm.
When the utility model is used, the gaps left at the joints of the upper spiral 5, the lower spiral 6 and the separating tube 4 provide a channel for the upwards floating of the bubbles separated by the spirals, thus improving the exhaust rate of the device; and the clearance with the width of 1mm-2mm between the upper spiral 5 and the lower spiral 6 and the inner wall of the outer sleeve 3 ensures that the separated sand grains can quickly sink into the tail pipe of the pump.
The present invention is not limited to the above-described embodiments, and various changes can be made within the knowledge range of those skilled in the art without departing from the spirit of the present invention, and the changed contents still belong to the protection scope of the present invention.
Claims (6)
1. The utility model provides a high-efficient sand setting gas anchor of two-stage separation which characterized in that: the device comprises an upper joint, a lower joint, an outer sleeve, a separation pipe, an upper screw, a lower screw and a one-way valve, wherein the upper joint is detachably connected with the upper end of the outer sleeve, the lower joint is detachably connected with the lower end of the outer sleeve, the separation pipe is arranged in the outer sleeve, and the upper end of the separation pipe is detachably connected with the upper joint; the upper part of the outer sleeve is provided with a plurality of sieve holes, the lower part of the outer sleeve is provided with a plurality of oil inlets, and the upper spiral and the lower spiral are fixedly arranged on the outer wall of the separating pipe and are arranged in parallel up and down;
the check valve is fixedly installed at the lower end of the separation pipe and comprises a valve body, a valve core, a spring and an end cover, the valve core is movably arranged in an inner cavity of the valve body, the end cover is installed at the bottom of the valve body, a sand discharge port is formed in the end cover, the spring is located between the valve core and the end cover, one end of the spring is fixed to the bottom of the valve core, and the other end of the spring is fixed to the end cover.
2. A two-stage separation high efficiency sand setting gas anchor as claimed in claim 1, wherein: gaps are reserved at the joints of the upper spiral, the lower spiral and the separating pipe.
3. A two-stage separation high efficiency sand setting gas anchor as claimed in claim 1 or 2, wherein: the spiral direction of the upper spiral is opposite to that of the lower spiral.
4. A two-stage separation high efficiency sand setting gas anchor as claimed in claim 1, wherein: the width of the gap between the upper spiral and the lower spiral and the inner wall of the outer sleeve is 1mm-2 mm.
5. A two-stage separation high efficiency sand setting gas anchor as claimed in claim 1, wherein: and a filter screen is arranged in the inner cavity of the separation pipe and is positioned above the oil inlet.
6. A two-stage separation high efficiency sand setting gas anchor as claimed in claim 1, wherein: four rows of sieve pores are arranged on the pipe wall of the upper part of the outer sleeve in a circumferential array, and each row contains three sieve pores.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023254434.4U CN212428783U (en) | 2020-12-30 | 2020-12-30 | Two-stage separation efficient sand setting gas anchor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023254434.4U CN212428783U (en) | 2020-12-30 | 2020-12-30 | Two-stage separation efficient sand setting gas anchor |
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| CN212428783U true CN212428783U (en) | 2021-01-29 |
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| CN202023254434.4U Active CN212428783U (en) | 2020-12-30 | 2020-12-30 | Two-stage separation efficient sand setting gas anchor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115370347A (en) * | 2022-08-22 | 2022-11-22 | 宋燕明 | Sand setting gas anchor for petroleum well and method |
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2020
- 2020-12-30 CN CN202023254434.4U patent/CN212428783U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115370347A (en) * | 2022-08-22 | 2022-11-22 | 宋燕明 | Sand setting gas anchor for petroleum well and method |
| CN115370347B (en) * | 2022-08-22 | 2023-09-05 | 盐城市弘通石油机械有限公司 | Sand setting gas anchor and method for petroleum underground |
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Effective date of registration: 20230904 Address after: 257000 No.37 Qilianshan Road, Shengli Economic Development Zone, Dongying District, Dongying City, Shandong Province Patentee after: DONGYING ZHAOXIN INDUSTRY AND TRADE CO.,LTD. Patentee after: SINOPEC SHENGLI PETROLEUM ENGINEERING Co.,Ltd. Address before: 257000 No.37 Qilianshan Road, Shengli Economic Development Zone, Dongying District, Dongying City, Shandong Province Patentee before: DONGYING ZHAOXIN INDUSTRY AND TRADE CO.,LTD. |