CN211058779U - Soluble temporary plugging slotted screen pipe - Google Patents
Soluble temporary plugging slotted screen pipe Download PDFInfo
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- CN211058779U CN211058779U CN201922282765.XU CN201922282765U CN211058779U CN 211058779 U CN211058779 U CN 211058779U CN 201922282765 U CN201922282765 U CN 201922282765U CN 211058779 U CN211058779 U CN 211058779U
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Abstract
The utility model discloses a soluble temporary plugging slot sieve tube, which consists of a punching inner tube, a supporting layer, a slot outer tube, an upper joint and a lower joint, wherein the supporting layer is wrapped outside the punching inner tube, the slot outer tube is nested outside the supporting layer, the punching inner tube, the supporting layer and the slot outer tube are tightly attached together without clearance, and the upper joint and the lower joint are respectively connected with two ends of the punching inner tube and the slot outer tube; the punching inner pipe is of a circular pipe structure, holes are uniformly drilled in the pipe body, the holes are sealed by soluble hole plugs, and the soluble hole plugs are made of soluble materials; the outer slotting tube is of a circular tube structure, a certain number of gaps are uniformly cut on the tube body, the supporting layer is provided with a plurality of overflowing channels, and the size of the overflowing channels is larger than the width of the gaps of the outer slotting tube. The utility model discloses can effectively solve high-pressure oil gas well and horizontal well screen pipe well completion and can not effectively replace the problem of thick liquid.
Description
Technical Field
The utility model relates to a well completion engineering technical field specifically is a soluble temporary blocking slot screen pipe.
Background
The screen pipe well completion is a commonly adopted oil and gas well completion mode, and the screen pipe can play a role in supporting a well wall, providing an oil and gas flow passage and preventing formation sand production. In high-pressure oil and gas wells and horizontal wells, the screen pipe is adopted for well completion, so that slurry can not effectively replace slurry in a shaft, the problem that the slurry pollutes a reservoir and blocks the screen pipe is caused, and the yield of the oil and gas wells is influenced.
In order to solve the problem of slurry replacement in screen pipe well completion, Chinese patent CN201554436U and Chinese patent CN101737024A disclose a temporary plugging screen pipe which can be opened, a plugging cover is connected in the base pipe hole of the screen pipe, and after the screen pipe is put into a shaft, the plugging cover is opened by a special tool. The problems of the temporary blocking mode are as follows: the plugging cover is opened by a special drilling and grinding tool which needs to be put in, the construction period is long, the construction risk is large, and especially for an ultra-deep high-pressure oil-gas well, once the plugging cover is suddenly opened, high-pressure oil gas enters an oil pipe, so that great well control risk is caused.
At present, the commonly used sieve tube is of various types, mainly including a slotted sieve tube, a wire-wound sieve tube, a metal cotton sieve tube, a metal mesh sieve tube, a pre-filled sieve tube and the like, wherein the slotted sieve tube has the advantages of simple processing, low cost, well wall collapse prevention and good medium-coarse sand prevention effect, and is widely applied to oil fields. Compared with other types of sieve tubes, due to the special structure, the slotted sieve tube has higher difficulty in realizing the temporary plugging function.
SUMMERY OF THE UTILITY MODEL
To the above problem, the utility model provides a soluble temporary blocking slot screen pipe can effectively solve the problem that high-pressure oil gas well and horizontal well screen pipe well completion can not effectively replace the thick liquid.
The technical scheme of the utility model as follows:
a soluble temporary plugging slotted screen pipe comprises a perforated inner pipe, a supporting layer, a slotted outer pipe, an upper joint and a lower joint, wherein the supporting layer is wrapped outside the perforated inner pipe, the slotted outer pipe is nested outside the supporting layer, the perforated inner pipe, the supporting layer and the slotted outer pipe are tightly attached together without gaps, and the upper joint and the lower joint are respectively connected with two ends of the perforated inner pipe and two ends of the slotted outer pipe; the punching inner pipe is of a circular pipe structure, holes are uniformly drilled in the pipe body, the holes are sealed by soluble hole plugs, and the soluble hole plugs are made of soluble materials; the outer slotting tube is of a circular tube structure, a certain number of gaps are uniformly cut on the tube body, the supporting layer is provided with a plurality of overflowing channels, and the size of the overflowing channels is larger than the width of the gaps of the outer slotting tube.
Further, the structure of the flow passage is a grid structure.
Furthermore, a rotary tool mounting groove is further formed in the circular surface of the lower portion of the soluble plug, and the rotary tool mounting groove is a strip-shaped groove or a cross groove.
Further, the soluble hole plug is a composite hole plug.
Furthermore, the composite hole plug consists of a plug seat, a soluble plug and a sealing ring.
Further, the plug seat is of a cylindrical structure, and the outer wall of the plug seat is provided with an external thread; the plug seat is internally provided with a through hole, the upper part of the through hole is of a conical surface structure, the lower part of the through hole is of a cylindrical structure, and an internal thread is arranged on the cylindrical structure at the lower part of the through hole.
Furthermore, the upper part of the soluble plug is of a cone structure, a groove is arranged on the cone structure, and a sealing ring is arranged in the groove; the lower part of the soluble plug is of a cylindrical structure, and the cylindrical structure is provided with external threads; the soluble plug is fixedly installed in the plug seat through threads to form a composite hole plug, and the soluble plug and the plug seat are in interference fit to ensure the sealing property.
Further, the lower portion of the soluble plug is located inside the base pipe, and the upper portion of the soluble plug is located outside the base pipe.
The utility model discloses an useful part lies in:
(1) the perforated base pipe is temporarily sealed by adopting the soluble plug, so that the requirements of slurry replacement, pressing and setting of a packer and fracturing transformation are met, the overflowing capacity of the base pipe can be recovered after the soluble plug is dissolved, and the production and sand prevention requirements are met; the structural design of the perforated inner pipe, the supporting layer and the slotted outer pipe not only utilizes the sand prevention function of the slotted sieve pipe, but also realizes the temporary plugging function through the perforated inner pipe, and simultaneously utilizes the supporting layer to improve the overall external extrusion resistance of the sieve pipe; the thickness of the outer slotted pipe is small, the depth of the slotted pipe is small, sand is not easy to block in the slot, the size of the flow passage of the supporting layer is larger than the width of the slotted pipe, and part of sand can smoothly enter the oil pipe through the supporting layer after passing through the slot and is discharged, so that the sieve pipe has self-cleaning capability, and the anti-blocking capability of the sieve pipe is improved.
(2) Adopt the utility model discloses a structure can effectively improve installation and sealed efficiency to holding the stopple, ensures the stability high-efficient of stifled function temporarily.
Drawings
Fig. 1 is a schematic external structural view of the present invention;
FIG. 2 is a cross-sectional view of FIG. 1;
FIG. 3 is a schematic structural diagram of the area A in FIG. 2;
FIG. 4 is a cross-sectional view of one embodiment of a soluble plug;
FIG. 5 is a cross-sectional view of another embodiment of a soluble pore plug;
FIG. 6 is a schematic diagram of the external structure of the soluble plug of FIG. 5;
FIG. 7 is a bottom view of FIG. 6;
fig. 8 is a schematic diagram of the position of the present invention in a well.
The figures are labeled as follows:
1 inner perforated pipe, 2 supporting layers, 3 outer slotted pipes, 4 upper joints, 5 lower joints, 6 rotary tool mounting grooves,
101 soluble hole plug,
301 gap,
1011 plug seat, 1012 soluble plug and 1013 sealing ring.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
As shown in figure 8, the soluble temporary plugging slotted screen is arranged on a downhole production section, and a packer is arranged at the outer part of the screen, so that the requirements of downhole operations such as well completion, fracturing and the like are met.
The first embodiment is as follows:
a soluble temporary plugging slotted screen pipe comprises a perforated inner pipe 1, a supporting layer 2, a slotted outer pipe 3, an upper joint 4 and a lower joint 5. The inner tube 1 that punches adopts the pipe, and the wall thickness is 6mm, evenly drills the punchhole on the body, is equipped with soluble stopple 101 in the punchhole. The outer side of the perforating inner pipe 1 is wrapped by the supporting layer 2, and the slotting outer pipe 3 is nested on the outer side of the supporting layer 2. The outer tube 3 is a round tube with the wall thickness of 3mm, a certain number of gaps 301 are uniformly cut on the tube body, the length of each gap 301 is 30-50mm, and the width of each gap 301 is 0.15-0.8 mm; the supporting layer 2 adopts a metal net with a certain thickness, and presents a grid structure or a diamond structure, and the size of the flow holes of the metal net is larger than the width of the gaps 301 of the slotted outer pipe 3. The inner perforated pipe 1, the supporting layer 2 and the outer slotted pipe 3 are tightly attached together without gaps. The upper joint 4 and the lower joint 5 are respectively connected with two ends of the inner pipe 1 for punching through threads, and two ends of the outer pipe 3 for cutting the seam are respectively fixed on the upper joint 4 and the lower joint 5 in a welding mode. The upper joint 4 is a male buckle, and the lower joint 5 is a female buckle.
The soluble hole plug 101 is made of magnesium aluminum alloy capable of being dissolved in acid, the lower part of the soluble hole plug 101 is provided with external threads, and the upper part of the soluble hole plug is provided with a sealing ring 1013. Is fixed in the hole of the base pipe by a threaded connection mode, and the sealing ring 1013 plays a role of leakage prevention. The lower circular surface of the soluble plug 1012 is also provided with a rotary tool mounting groove 6, specifically a strip-shaped groove or a cross groove, which is convenient for mounting the soluble hole plug 101.
The technical principle of the sand control completion by adopting the soluble temporary plugging slotted screen pipe is as follows:
and combining a plurality of soluble temporary plugging slotted screen pipes with other matched tools, and putting the soluble temporary plugging slotted screen pipes into the shaft, wherein the slotted screen pipes are positioned in the reservoir interval. Injecting solid-free completion fluid from the oil jacket ring in the air to replace the heavy mud in the well bore. Because the inner pipe 1 is in a closed state, the solid-free completion fluid cannot enter the oil pipe through the sieve tube and only can continuously displace the heavy mud to enter the oil pipe from the bottom of the completion pipe string, so that the heavy mud in the shaft can be completely displaced. After slurry replacement is finished, acid liquor is squeezed and injected, the soluble plug 1012 is dissolved, and the sand control screen pipe recovers a flow channel. In the production process, oil gas enters the oil pipe through the 3 gaps 301 of the slotted outer pipe, the 2 holes of the supporting layer and the 1 hole of the perforated inner pipe, and meanwhile, the slotted outer pipe 3 prevents formation sand from entering the oil pipe, so that the sand prevention effect is achieved. Because the inner tube 1 that punches, supporting layer 2 and slot outer tube 3 zero clearance hug closely together for big, the high slot inner tube 1 that punches of intensity can play the supporting role to the relatively less slot outer tube 3 of intensity through supporting layer 2, prevents that slot outer tube 3 from taking place to warp under the external pressure effect, allows the fluid to get into the inner tube 1 punchhole that punches through the runner of supporting layer 2 simultaneously.
Example two:
a soluble temporary plugging slotted screen pipe comprises a perforated inner pipe 1, a supporting layer 2, a slotted outer pipe 3, an upper joint 4 and a lower joint 5. The inner pipe 1 that punches adopts the pipe, and the wall thickness is 6mm, evenly drills the punchhole on the body, is equipped with compound stopple in the punchhole. The outer side of the perforating inner pipe 1 is wrapped by the supporting layer 2, and the slotting outer pipe 3 is nested on the outer side of the supporting layer 2. The outer tube 3 is a round tube with the wall thickness of 3mm, a certain number of gaps 301 are uniformly cut on the tube body, the length of each gap 301 is 30-50mm, and the width of each gap 301 is 0.15-0.8 mm; the supporting layer 2 adopts a metal net with a certain thickness, and presents a grid structure or a diamond structure, and the size of the flow holes of the metal net is larger than the width of the gaps 301 of the slotted outer pipe 3. The inner perforated pipe 1, the supporting layer 2 and the outer slotted pipe 3 are tightly attached together without gaps. The upper joint 4 and the lower joint 5 are respectively connected with two ends of the inner pipe 1 for punching through threads, and two ends of the outer pipe 3 for cutting the seam are respectively fixed on the upper joint 4 and the lower joint 5 in a welding mode. The upper joint 4 is a male buckle, and the lower joint 5 is a female buckle.
The composite plug consists of a plug seat 1011, a soluble plug 1012 and a sealing ring 1013. The plug seat 1011 is a cylindrical structure, and the outer wall of the plug seat is provided with external threads. The inside through-hole that sets up of stopper seat 1011, through-hole upper portion is the conical surface structure, and the lower part is the cylindricality structure, and sets up the internal thread on the cylindricality structure of lower part. The upper part of the soluble plug 1012 is of a cone structure, a groove is arranged on the cone structure, and a sealing ring 1013 is arranged in the groove; the lower portion of soluble plug 1012 is a cylindrical structure with external threads disposed thereon. A strip-shaped groove or a cross-shaped groove is further formed in the lower circular surface of the soluble plug 1012, so that the soluble plug 1012 and the composite hole plug can be conveniently installed. The soluble plug 1012 is fixedly installed in the plug seat 1011 through threads to form a composite hole plug, and the soluble plug 1012 and the plug seat 1011 are in interference fit, so that the sealing performance is guaranteed. The composite plug is installed in the base pipe bore by a threaded attachment, with the lower portion of soluble plug 1012 being inside the base pipe and the upper portion of soluble plug 1012 being outside the base pipe. The plug seat 1011 is made of steel material the same as that of the base pipe, and the soluble plug 1012 is made of magnesium-aluminum alloy capable of being dissolved in acid.
This embodiment, for embodiment one, has higher anti internal pressure intensity, can cooperate the layering packer for the layering fracturing transformation, when the layering fracturing changes the layer, need beat and set a packer and squeeze injection fracturing fluid, very high anti internal pressure requirement can be guaranteed in the design of compound stopple.
The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiments, and although the present invention has been disclosed with the preferred embodiments, it is not limited to the present invention, and any skilled person in the art can make some modifications or equivalent embodiments without departing from the scope of the present invention, but all the technical matters of the present invention are within the scope of the present invention.
Claims (8)
1. A soluble temporary plugging slotted screen pipe is characterized by comprising a perforated inner pipe, a supporting layer, a slotted outer pipe, an upper joint and a lower joint, wherein the supporting layer is wrapped outside the perforated inner pipe; the punching inner pipe is of a circular pipe structure, holes are uniformly drilled in the pipe body, the holes are sealed by soluble hole plugs, and the soluble hole plugs are made of soluble materials; the outer slotting tube is of a circular tube structure, a certain number of gaps are uniformly cut on the tube body, the supporting layer is provided with a plurality of overflowing channels, and the size of the overflowing channels is larger than the width of the gaps of the outer slotting tube.
2. The soluble temporary plugging slotted screen of claim 1, wherein said structure of said flow-through channels is a grid structure.
3. The soluble temporary plugging slotted screen pipe according to claim 1, wherein the soluble hole plug is externally threaded at the lower part and provided with a sealing ring at the upper part, the soluble plug is further provided with a rotary tool mounting groove on the lower circular surface, and the rotary tool mounting groove is in a strip-shaped groove or a cross-shaped groove.
4. The soluble temporary plugging slotted screen of claim 1, wherein said soluble plug comprises a composite plug.
5. The soluble temporary plugging slotted screen of claim 4, wherein said composite plug is comprised of a plug base, a soluble plug and a sealing ring.
6. The soluble temporary plugging slotted screen pipe according to claim 5, wherein said plug base is of a cylindrical structure, the outer wall of which is provided with external threads; the plug seat is internally provided with a through hole, the upper part of the through hole is of a conical surface structure, the lower part of the through hole is of a cylindrical structure, and an internal thread is arranged on the cylindrical structure at the lower part of the through hole.
7. The soluble temporary plugging slotted screen pipe according to claim 5, wherein the upper part of the soluble plug is in a cone structure, a groove is arranged on the cone structure, and a sealing ring is arranged in the groove; the lower part of the soluble plug is of a cylindrical structure, and the cylindrical structure is provided with an external thread; the soluble plug is fixedly installed in the plug seat through threads to form the composite hole plug, and the soluble plug and the plug seat are in interference fit.
8. The soluble temporary plugging slotted screen of claim 6 or 7, wherein a lower portion of the soluble plug is located inside the basepipe and an upper portion of the soluble plug is located outside the basepipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922282765.XU CN211058779U (en) | 2019-12-18 | 2019-12-18 | Soluble temporary plugging slotted screen pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922282765.XU CN211058779U (en) | 2019-12-18 | 2019-12-18 | Soluble temporary plugging slotted screen pipe |
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| Publication Number | Publication Date |
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| CN211058779U true CN211058779U (en) | 2020-07-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201922282765.XU Active CN211058779U (en) | 2019-12-18 | 2019-12-18 | Soluble temporary plugging slotted screen pipe |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111980638A (en) * | 2020-08-28 | 2020-11-24 | 中国石油天然气股份有限公司 | Temporary plugging sieve tube, well completion pipe string and running method of well completion pipe string |
| CN112814630A (en) * | 2020-09-29 | 2021-05-18 | 中海油能源发展股份有限公司 | Soluble sieve tube and using method thereof |
| CN115306354A (en) * | 2022-10-09 | 2022-11-08 | 四川圣诺油气工程技术服务有限公司 | Temporary plugging type liner tube for under-pressure pressing |
| CN115573684A (en) * | 2022-11-18 | 2023-01-06 | 山东圣颐石油技术开发有限公司 | Device for automatically closing overcurrent at fixed time and using method thereof |
| CN116877031A (en) * | 2023-09-08 | 2023-10-13 | 山东博赛特石油技术有限公司 | Temporary plugging soluble slotted screen pipe and use method thereof |
-
2019
- 2019-12-18 CN CN201922282765.XU patent/CN211058779U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111980638A (en) * | 2020-08-28 | 2020-11-24 | 中国石油天然气股份有限公司 | Temporary plugging sieve tube, well completion pipe string and running method of well completion pipe string |
| CN112814630A (en) * | 2020-09-29 | 2021-05-18 | 中海油能源发展股份有限公司 | Soluble sieve tube and using method thereof |
| CN115306354A (en) * | 2022-10-09 | 2022-11-08 | 四川圣诺油气工程技术服务有限公司 | Temporary plugging type liner tube for under-pressure pressing |
| CN115573684A (en) * | 2022-11-18 | 2023-01-06 | 山东圣颐石油技术开发有限公司 | Device for automatically closing overcurrent at fixed time and using method thereof |
| CN115573684B (en) * | 2022-11-18 | 2023-04-07 | 山东圣颐石油技术开发有限公司 | Device for automatically closing overcurrent at fixed time and using method thereof |
| CN116877031A (en) * | 2023-09-08 | 2023-10-13 | 山东博赛特石油技术有限公司 | Temporary plugging soluble slotted screen pipe and use method thereof |
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