CN210598921U - Acid injection sliding sleeve valve capable of recovering water injection - Google Patents
Acid injection sliding sleeve valve capable of recovering water injection Download PDFInfo
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- CN210598921U CN210598921U CN201921530645.0U CN201921530645U CN210598921U CN 210598921 U CN210598921 U CN 210598921U CN 201921530645 U CN201921530645 U CN 201921530645U CN 210598921 U CN210598921 U CN 210598921U
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- outer barrel
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Abstract
The utility model relates to a recoverable water injection acid injection sliding sleeve valve, which comprises an outer barrel, wherein the lower end of the outer barrel is screwed with a lower joint, the upper port of the outer barrel is provided with a conical female thread, a first inner step of the barrel is arranged below the conical female thread, the middle section of the inner cavity of the outer barrel is provided with a sliding sleeve, the outer wall of the sliding sleeve is attached to the inner wall of the outer barrel, and the upper end surface of the sliding sleeve is propped against the lower part of the first inner step of the barrel; a sliding sleeve bell mouth is arranged at the upper end of the central hole of the sliding sleeve, and a soluble ball is seated at the sliding sleeve bell mouth; a through barrel liquid outlet is arranged below the first inner step of the barrel, and the inner port of the barrel liquid outlet is covered by a sliding sleeve; the sliding sleeve spring is supported below the sliding sleeve and surrounds the periphery of the bushing, the bushing is screwed at the lower end of the sliding sleeve, the lower end of the sliding sleeve spring is supported on the upper end face of the lower connector, and the upper end of the sliding sleeve spring abuts against the lower end face of the sliding sleeve. The acid injection sliding sleeve valve can inject acid liquor into a stratum, an acid injection channel can be closed in time after acid injection is finished, and the water injection channel can be recovered after an acidification reaction.
Description
Technical Field
The utility model relates to a ooff valve that acidizing water injection tubular column was used especially relates to a sour sliding sleeve valve of notes of recoverable water injection, belongs to water injection tubular column downhole valve technical field.
Background
After the water injection well is developed for a period of time, particularly in the later stage of oil field development, the water injection pressure of most of the water injection wells can be greatly improved, and the water injection well shows the trend of increasing year by year, so that the water injection amount is less and less, the water injection development effect is seriously influenced, and finally the oil field yield is greatly reduced.
The acidification is a blockage removal and injection increase measure frequently adopted for the stratum, and by utilizing the chemical corrosion action of acid liquor and the hydraulic action when acid is squeezed into the stratum, stratum plugs and partial stratum minerals are corroded, stratum slots are enlarged, extended and communicated, or artificial cracks with higher flow conductivity are formed in the stratum, so that the stratum permeability is restored and improved, the resistance of oil gas flowing into the bottom of a well is reduced, the injection capacity of a water injection well is improved, and the aims of increasing the yield of an oil well and increasing the injection of the water well are fulfilled.
In the prior water injection well blockage removal or injection increase construction, separate injection and blockage removal are respectively implemented by two pipe columns, and the operation procedures are generally as follows: lifting a water injection pipe column under the well → treating a shaft → lowering a separate layer plugging removal or injection adding pipe column → plugging removal or injection adding construction → draining liquid → lowering a separate injection pipe column, wherein the separate layer plugging removal or injection adding pipe column generally adopts a mechanical setting or hydraulic setting packer and a matched sieve pipe or a single flow valve sliding sleeve switch.
The traditional acidification and blockage removal process mainly has the following problems that ⑴ has certain risk due to the fact that pressure relief or liquid drainage is carried out after acidification, an oil layer is excited, particles are possibly moved, and therefore damage to a reservoir is caused, ⑵ long-time flowback treatment is carried out after acidification and blockage removal, the well occupying time is long, ⑶ construction procedures are multiple, the period is long, tools are multiple, the operation cost is increased, in order to prevent the coating of a coating oil pipe below a sieve pipe from being damaged in the process of ⑷ pumping and liquid drainage, a set of common oil pipe needs to be arranged again for acidification and liquid drainage construction, the material cost is increased, acid liquid discharged from ⑸ flowback cannot be discharged on site, a special vehicle needs to be transported to a specified place for treatment, and the subsequent treatment cost is increased.
Under the current situation of low oil price, the research of the layered acidification and layered water injection integrated non-return process is developed, the water drive development effect is improved, the operation cost is reduced, the material cost is saved, the well occupation period is shortened, the oil field development cost is reduced, the oil field development benefit is improved, and the method has important significance in the aspects of energy conservation, environmental protection and the like.
The acidizing and water injection integrated tubular column comprises two eccentric water distributors corresponding to two water injection layers, a packer is arranged between the two eccentric water distributors, an acidizing check valve, a sieve tube, a coating oil tube and a plug are arranged below the lower eccentric water distributor, the acidizing check valve can control the formation below the packer to inject acid, and a switch valve is matched above the upper eccentric water distributor to control the formation above the packer to inject acid.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the problem that exists among the prior art, provide a sour sliding sleeve valve of notes of recoverable water injection, be applied to acidizing water injection integration tubular column, can pour into the acidizing fluid into to the stratum, annotate and can in time close notes sour passageway after sour finishes, can resume water injection passageway after the acidizing reaction.
For solving above technical problem, the utility model discloses a sour sliding sleeve valve of notes of recoverable water injection, including outer barrel, the lower extreme of outer barrel has connect the lower clutch soon, the last port of outer barrel is equipped with toper box thread, its characterized in that: a first barrel inner step is arranged below the conical female thread, a sliding sleeve is arranged in the middle section of the inner cavity of the outer barrel, the outer wall of the sliding sleeve is attached to the inner wall of the outer barrel, and the upper end face of the sliding sleeve abuts against the lower part of the first barrel inner step; a sliding sleeve bell mouth is arranged at the upper end of the central hole of the sliding sleeve, and a soluble ball is seated at the sliding sleeve bell mouth; a through cylinder liquid outlet is arranged below the first inner step of the cylinder, and the inner port of the cylinder liquid outlet is covered by a sliding sleeve; the lower end of the sliding sleeve is provided with a sliding sleeve spring for pushing the sliding sleeve to move upwards, the sliding sleeve spring surrounds the periphery of the bushing, the upper end of the bushing is screwed in the internal thread at the lower end of the sliding sleeve, and the lower end of the bushing is inserted into the inner cavity of the lower joint; the lower end of the sliding sleeve spring is supported on the upper end face of the lower joint, and the inner edge of the upper end of the sliding sleeve spring abuts against the lower end face of the sliding sleeve.
Compared with the prior art, the utility model discloses following beneficial effect has been obtained: after dropping into the soluble ball and setting up at the last port of sliding sleeve, cement truck is just being suppressed, and the soluble ball promotes the sliding sleeve gliding, and the lower extreme of bush slides in the centre bore of lower clutch, plays the effect of direction and stable sliding sleeve spring, moves down when the sliding sleeve exposes to the barrel liquid outlet, pours into the acidizing fluid into the tubular column through cement truck, and the acidizing fluid flows out from the barrel liquid outlet, gets into the water injection layer from the annular space of tubular column. After the acid solution is fed completely, the displacing liquid is continuously injected, and the inner cavity of the pipe column is ensured to be filled with the displacing liquid; then the cement truck is turned off, the high pressure above the soluble ball disappears, the sliding sleeve spring pushes the sliding sleeve to move upwards to cover the liquid outlet of the barrel body, and the acidification liquid outlet channel is closed. And then closing the well, carrying out an acidification reaction on a water injection layer, dissolving the soluble ball, and enabling the central channel of the acid injection sliding sleeve valve to be unblocked again for water injection.
As a further improvement, the lower extreme outer wall of bush with the downthehole wall laminating of lower clutch, the middle section of lower clutch centre bore is equipped with lower clutch inner step, the lower terminal surface of bush with distance between the lower clutch inner step equals the up end of sliding sleeve with distance between the lower edge of barrel liquid outlet. The lower extreme of bush and the centre bore of lower clutch form good cooperation for the direction of bush is more accurate, and when the lower terminal surface of bush was down and supported and lean on the lower clutch inner step, the up end of sliding sleeve has been down to the below of barrel liquid outlet, exposes the barrel liquid outlet completely, ensures the smoothness of acidizing fluid passageway on the one hand, and on the other hand has realized the location of stroke under the sliding sleeve.
As a further improvement, the inner wall of outer barrel is equipped with the step in the barrel second with the position of the lower terminal surface parallel and level of sliding sleeve, the upper end outer fringe of sliding sleeve spring supports and leans on the below of step in the barrel second. The upper stroke of the sliding sleeve spring can be positioned in an auxiliary mode through the second inner step of the cylinder body, the cavity below the second inner step of the cylinder body provides an accommodating space for the sliding sleeve spring, the diameter of an inner hole of the bushing is enlarged as far as possible, and a larger downward channel is provided for the sealing steel ball and a downhole instrument.
As a further improvement, the upper portion periphery of sliding sleeve is inlayed and is equipped with at least twice upper seal circle, the middle part periphery of sliding sleeve is inlayed and is equipped with at least twice well sealing washer, the barrel liquid outlet is located at the direction of height between upper seal circle and the well sealing washer. Go up the sealing washer and seal up the ascending leakage clearance of barrel liquid outlet, well sealing washer seals up the decurrent leakage clearance of barrel liquid outlet for before the sliding sleeve is down, the acidizing fluid can not spill from the barrel liquid outlet.
As a further improvement, the external screw thread section below of lower clutch is equipped with the outer step of lower clutch, the lower terminal surface of outer barrel supports and leans on the outer step of lower clutch, the top of the external screw thread section of lower clutch is equipped with the lower clutch seal section, the periphery of lower clutch seal section inlay be equipped with at least twice lower seal circle with the inner wall of outer barrel realizes sealedly. The outer step of lower clutch plays the axial positioning effect to the precession of lower clutch, and at least twice lower seal circle can be installed to the sealed section of lower clutch for the sealed good between lower clutch and the outer barrel.
As a further improvement, the inner diameter of the upper end opening of the horn mouth of the sliding sleeve is equal to the inner diameter of the first inner step of the cylinder, and the inner diameter of the bushing is equal to the inner diameter of the sliding sleeve. The upper port of the sliding sleeve bell mouth is in smooth butt joint with the first inner step of the barrel, and the lining is in smooth butt joint with the inner wall of the sliding sleeve, so that the smooth descending of a well descending instrument is facilitated.
Drawings
The invention will be described in further detail with reference to the drawings and the detailed description, which are provided for reference and illustration purposes only and are not intended to limit the invention.
Fig. 1 is a schematic structural view of the acid-filling sliding sleeve valve capable of recovering water injection according to the present invention.
In the figure: 1. an outer cylinder; 1a, conical female threads; 1b, a first inner step of the cylinder; 1c, a liquid outlet of the cylinder; 1d, a second inner step of the cylinder; 2. a soluble ball; 3. a sliding sleeve; 3a, an upper sealing ring; 3b, a middle sealing ring; 4. a sliding sleeve spring; 5. a bushing; 6. a lower joint; 6a, a lower sealing ring; 6b, lower joint inner steps; and 6c, connecting the lower joint outer step.
Detailed Description
As shown in fig. 1, the acid-injected sliding sleeve valve capable of recovering water injection of the present invention comprises an outer cylinder 1, a lower joint 6 is screwed to the lower end of the outer cylinder 1, a tapered female thread 1a is provided at the upper port of the outer cylinder 1, a first inner step 1b of the cylinder is provided below the tapered female thread 1a, a sliding sleeve 3 is provided in the middle section of the inner cavity of the outer cylinder 1, the outer wall of the sliding sleeve 3 is attached to the inner wall of the outer cylinder 1, and the upper end surface of the sliding sleeve 3 is abutted to the lower part of the first inner step 1b of the cylinder; the upper end of the central hole of the sliding sleeve 3 is provided with a sliding sleeve bell mouth, and the sliding sleeve bell mouth is provided with a soluble ball 2 in a seating manner. A through cylinder liquid outlet 1c is arranged below the first inner step 1b of the cylinder, and the inner port of the cylinder liquid outlet 1c is covered by a sliding sleeve 3; the lower end of the sliding sleeve 3 is provided with a sliding sleeve spring 4 for pushing the sliding sleeve 3 to move upwards.
The periphery at bush 5 is encircleed to sliding sleeve spring 4, and the upper end of bush 5 articulates in the internal thread of 3 lower extremes of sliding sleeve, and the lower extreme of bush 5 inserts in the inner chamber of lower clutch 6, and the lower extreme of sliding sleeve spring 4 supports in the up end of lower clutch 6, and the lower terminal surface at sliding sleeve 3 is pushed up to the upper end inner edge of sliding sleeve spring 4.
After the soluble ball 2 is put into and is seated at the upper port of the sliding sleeve 3, the cement truck is being pressed, the soluble ball 2 pushes the sliding sleeve 3 to slide downwards, and the lower end of the bushing 5 slides in the central hole of the lower joint 6, so that the functions of guiding and stabilizing the sliding sleeve spring 4 are achieved. When the sliding sleeve 3 moves down to the barrel liquid outlet 1c to be exposed, acid liquor is injected into the pipe column through the cement truck, flows out of the barrel liquid outlet 1c, and enters the water injection layer from the annular space of the pipe column. After the acid solution is fed completely, the displacing liquid is continuously injected, and the inner cavity of the pipe column is ensured to be filled with the displacing liquid; then the cement truck is closed, the high pressure above the soluble ball 2 disappears, the sliding sleeve spring 4 pushes the sliding sleeve 3 to move upwards, the liquid outlet 1c of the cylinder body is shielded, and the acidification liquid outlet channel is closed. And then closing the well, carrying out an acidification reaction on the water injection layer, dissolving the soluble ball 2, and enabling the central channel of the acid injection sliding sleeve valve to be unblocked again for water injection.
The lower extreme outer wall of bush 5 and the downthehole wall laminating of center of lower clutch 6, the middle section of lower clutch centre bore is equipped with lower clutch inner step 6b, and the distance between the lower terminal surface of bush 5 and the lower clutch inner step 6b equals the distance between the up end of sliding sleeve 3 and the lower edge of barrel liquid outlet 1c. The lower extreme of bush 5 and the centre bore of lower clutch 6 form good cooperation for the direction of bush 5 is more accurate, and when the lower terminal surface of bush 5 was down and supported and lean on in the lower clutch on step 6b, the up end of sliding sleeve 3 has been down to the below of barrel liquid outlet 1c, exposes barrel liquid outlet 1c completely, ensures the smoothness of acidizing fluid passageway on the one hand, and on the other hand has realized the location of sliding sleeve 3 lower stroke.
The inner wall of outer barrel 1 and the lower terminal surface parallel and level of sliding sleeve 3 position are equipped with barrel second inner step 1d, and the upper end outer fringe of sliding sleeve spring 4 supports and leans on the below at barrel second inner step 1d. The upper stroke of the sliding sleeve spring 4 can be positioned in an auxiliary mode through the second inner step 1d of the cylinder body, a containing space is provided for the sliding sleeve spring 4 through the concave cavity below the second inner step 1d of the cylinder body, the diameter of an inner hole of the bushing 5 is enlarged as far as possible, and a larger downward channel is provided for a sealing steel ball and a downhole instrument.
At least two upper sealing rings 3a are embedded on the periphery of the upper part of the sliding sleeve 3, at least two middle sealing rings 3b are embedded on the periphery of the middle part of the sliding sleeve 3, and the liquid outlet 1c of the cylinder body is positioned between the upper sealing rings 3a and the middle sealing rings 3b in the height direction. Go up sealing washer 3a and seal the ascending leakage clearance of barrel liquid outlet 1c, well sealing washer 3b seals the decurrent leakage clearance of barrel liquid outlet 1c for before sliding sleeve 3 descends, the acidizing fluid can not spill from barrel liquid outlet 1c.
The lower joint outer step 6c is arranged below the outer thread section of the lower joint 6, the lower end face of the outer cylinder body 1 abuts against the lower joint outer step 6c, the lower joint sealing section is arranged above the outer thread section of the lower joint, and at least two lower sealing rings 6a are embedded in the periphery of the lower joint sealing section to realize sealing with the inner wall of the outer cylinder body 1. The outer step 6c of lower clutch plays the axial positioning effect to the precession of lower clutch 6, and at least twice lower seal circle 6a can be installed to the sealed section of lower clutch for the sealed good between lower clutch 6 and the outer barrel 1.
The inner diameter of the upper end opening of the sliding sleeve bell mouth is equal to the inner diameter of the first inner step 1b of the cylinder body, and the inner diameter of the lining 5 is equal to the inner diameter of the sliding sleeve 3. The upper port of the sliding sleeve bell mouth is in smooth butt joint with the first inner step 1b of the barrel, and the lining 5 is in smooth butt joint with the inner wall of the sliding sleeve 3, so that smooth descending of a downhole instrument is facilitated.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention. In addition to the above embodiments, the present invention may have other embodiments. All the technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope claimed by the present invention. The undescribed technical features of the present invention can be realized by or using the prior art, and are not described herein again.
Claims (6)
1. The utility model provides a recoverable water injection annotate sour sliding sleeve valve, includes outer barrel, the lower extreme of outer barrel has connect the lower clutch soon, the last port of outer barrel is equipped with toper female screw, its characterized in that: a first barrel inner step is arranged below the conical female thread, a sliding sleeve is arranged in the middle section of the inner cavity of the outer barrel, the outer wall of the sliding sleeve is attached to the inner wall of the outer barrel, and the upper end face of the sliding sleeve abuts against the lower part of the first barrel inner step; a sliding sleeve bell mouth is arranged at the upper end of the central hole of the sliding sleeve, and a soluble ball is seated at the sliding sleeve bell mouth; a through cylinder liquid outlet is arranged below the first inner step of the cylinder, and the inner port of the cylinder liquid outlet is covered by a sliding sleeve; the lower end of the sliding sleeve is provided with a sliding sleeve spring for pushing the sliding sleeve to move upwards, the sliding sleeve spring surrounds the periphery of the bushing, the upper end of the bushing is screwed in the internal thread at the lower end of the sliding sleeve, and the lower end of the bushing is inserted into the inner cavity of the lower joint; the lower end of the sliding sleeve spring is supported on the upper end face of the lower joint, and the inner edge of the upper end of the sliding sleeve spring abuts against the lower end face of the sliding sleeve.
2. The acid injection sliding sleeve valve capable of recovering water injection as claimed in claim 1, wherein: the lower extreme outer wall of bush with the downthehole wall laminating of centre of lower clutch, the middle section of lower clutch centre bore is equipped with the lower clutch interior step, the lower terminal surface of bush with distance between the interior step of lower clutch equals the up end of sliding sleeve with distance between the lower edge of barrel liquid outlet.
3. The acid injection sliding sleeve valve capable of recovering water injection as claimed in claim 1, wherein: the inner wall of outer barrel and the lower terminal surface parallel and level of sliding sleeve position are equipped with barrel second inner step, the upper end outer fringe of sliding sleeve spring supports and leans on the below at barrel second inner step.
4. The acid injection sliding sleeve valve capable of recovering water injection as claimed in claim 1, wherein: the upper portion periphery of sliding sleeve inlays and is equipped with at least twice upper seal circle, the middle part periphery of sliding sleeve inlays and is equipped with at least twice well sealing washer, the barrel liquid outlet is located in the direction of height between upper seal circle and the well sealing washer.
5. The acid injection sliding sleeve valve capable of recovering water injection as claimed in claim 1, wherein: the outer screw thread section below of lower clutch is equipped with the outer step of lower clutch, the lower terminal surface of outer barrel supports and leans on the outer step of lower clutch, the top of the outer screw thread section of lower clutch is equipped with the lower clutch seal section, the periphery of lower clutch seal section is inlayed and is equipped with at least twice lower seal circle with the inner wall of outer barrel realizes sealing.
6. The acid injection sliding sleeve valve capable of recovering water injection as claimed in claim 1, wherein: the inner diameter of the upper end opening of the horn mouth of the sliding sleeve is equal to the inner diameter of the first inner step of the cylinder body, and the inner diameter of the bushing is equal to the inner diameter of the sliding sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921530645.0U CN210598921U (en) | 2019-09-16 | 2019-09-16 | Acid injection sliding sleeve valve capable of recovering water injection |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921530645.0U CN210598921U (en) | 2019-09-16 | 2019-09-16 | Acid injection sliding sleeve valve capable of recovering water injection |
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| Publication Number | Publication Date |
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| CN210598921U true CN210598921U (en) | 2020-05-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921530645.0U Active CN210598921U (en) | 2019-09-16 | 2019-09-16 | Acid injection sliding sleeve valve capable of recovering water injection |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111734352A (en) * | 2020-07-17 | 2020-10-02 | 西南石油大学 | Acid distributing effect is effectual even acid distributing device |
| CN113846993A (en) * | 2021-09-29 | 2021-12-28 | 山东大东联石油设备有限公司 | Pressure drive valve and use method |
| CN114753801A (en) * | 2022-04-08 | 2022-07-15 | 中国石油化工股份有限公司 | Cementing plug slide valve and cementing plug tubular column |
| CN115135849A (en) * | 2021-07-20 | 2022-09-30 | 北京合力奇点科技有限公司 | Flow-regulating water-controlling acidizing well completion device for oil-gas well and use method |
-
2019
- 2019-09-16 CN CN201921530645.0U patent/CN210598921U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111734352A (en) * | 2020-07-17 | 2020-10-02 | 西南石油大学 | Acid distributing effect is effectual even acid distributing device |
| CN115135849A (en) * | 2021-07-20 | 2022-09-30 | 北京合力奇点科技有限公司 | Flow-regulating water-controlling acidizing well completion device for oil-gas well and use method |
| WO2023000169A1 (en) * | 2021-07-20 | 2023-01-26 | 北京合力奇点科技有限公司 | Flow-regulating water-controlling and acidification well-completion device for oil-gas well and use method |
| CN113846993A (en) * | 2021-09-29 | 2021-12-28 | 山东大东联石油设备有限公司 | Pressure drive valve and use method |
| CN114753801A (en) * | 2022-04-08 | 2022-07-15 | 中国石油化工股份有限公司 | Cementing plug slide valve and cementing plug tubular column |
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