CN211448620U - Leakage-proof cleaning device under pump and oil gas production pipe column - Google Patents
Leakage-proof cleaning device under pump and oil gas production pipe column Download PDFInfo
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- CN211448620U CN211448620U CN201921854092.4U CN201921854092U CN211448620U CN 211448620 U CN211448620 U CN 211448620U CN 201921854092 U CN201921854092 U CN 201921854092U CN 211448620 U CN211448620 U CN 211448620U
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- oil
- sand control
- control screen
- pump
- pipe
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- 238000004140 cleaning Methods 0.000 title claims abstract description 37
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 35
- 239000004576 sand Substances 0.000 claims abstract description 68
- 239000003129 oil well Substances 0.000 claims abstract description 27
- 239000007788 liquid Substances 0.000 claims abstract description 18
- 239000010985 leather Substances 0.000 claims description 34
- 238000007599 discharging Methods 0.000 claims description 5
- 238000012856 packing Methods 0.000 claims description 3
- 239000004215 Carbon black (E152) Substances 0.000 claims 2
- 229930195733 hydrocarbon Natural products 0.000 claims 2
- 150000002430 hydrocarbons Chemical class 0.000 claims 2
- 238000011010 flushing procedure Methods 0.000 abstract description 26
- 239000003921 oil Substances 0.000 description 90
- 239000012530 fluid Substances 0.000 description 23
- 238000000034 method Methods 0.000 description 4
- 238000005086 pumping Methods 0.000 description 4
- 230000008602 contraction Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 230000033558 biomineral tissue development Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000008398 formation water Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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Abstract
The utility model relates to a leak protection belt cleaning device and oil gas production tubular column under pump, wherein, belt cleaning device include vertical setting and top-down order fixed connection's oil-well pump, go up sand control screen pipe and sand control screen pipe down, the cover is equipped with the rubber cup device that can the aerial liquid of the oil supply lantern ring passes through or shutoff oil jacket annulus on the pipe wall between last sand control screen pipe and the sand control screen pipe down, and the top of sand control screen pipe is fixed with the single current valve down. The utility model provides a leak protection belt cleaning device and oil gas production tubular column under pump can prevent that the well-flushing liquid from getting into the oil layer section of leaking when wasing pump barrel and upper portion tubular column.
Description
Technical Field
The utility model relates to an oil gas exploitation technical field especially relates to a leak protection belt cleaning device and oil gas production tubular column under pump, mainly is applicable to the more serious oil well of oil reservoir leakage.
Background
In the prior sand control measures of a sand production well, a two-stage sand control structure is generally adopted, wherein a lower sand control screen pipe is hung or connected in an oil interval to serve as a first-stage sand control structure, and an upper sand control screen pipe is connected below a pump to serve as a second-stage sand control structure. Under the concept of moderate sand control, a small part of formation sand with smaller particle size is allowed to enter the two-stage sand control pipe column along with the produced fluid of the oil layer and is discharged out of the ground. However, during the long-term production of the oil well, the oil layer production liquid in the pump cylinder contains small-particle formation sand, and the factors such as the nature of the crude oil, the mineralization degree of formation water and the like are easy to scale, wax or block nearby the pump cylinder. In addition, during the period that the oil well pump stops pumping occasionally due to other factors, solid particles in the oil layer production liquid in the oil pipe above the pump barrel can settle to a traveling valve and a fixed valve of the oil well pump due to the action of gravity, and the pump is blocked. It is therefore necessary to clean the pump barrel and its upper string after a certain period of well production or after occasional pumping interruptions.
Because the standing valve in the oil well pump plays the effect of single current, the well-flushing fluid can not pass through from top to bottom through oil pipe. At present, the pump barrel of the oil well pump and the upper pipe column thereof are washed mainly by pumping well washing liquid into an oil sleeve annulus (namely the annulus between an oil pipe and a sleeve), entering from a sand control screen pipe below the pump, upwards passing through the oil well pump and returning to the ground along the oil pipe.
However, if the oil interval has a leakage condition, a large part of the flushing fluid enters the oil layer, and little or no flushing fluid returns to the ground after the pump barrel is cleaned, so that the cleaning efficiency is seriously influenced, and the pollution of the reservoir is also caused.
Therefore, the inventor provides the leakage-proof cleaning device under the pump and the oil-gas production pipe column by virtue of experience and practice of related industries for many years, so as to overcome the defects in the prior art.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a leak protection belt cleaning device and oil gas production tubular column under pump can prevent that well-flushing liquid from getting into the oil layer section of leaking when wasing pump barrel and upper portion tubular column.
The purpose of the utility model can be realized by adopting the following technical scheme:
the utility model provides an anti-leakage cleaning device under a pump, which comprises an oil well pump, an upper sand control screen pipe and a lower sand control screen pipe which are vertically arranged and fixedly connected in sequence from top to bottom; the pipe wall between the upper sand control screen pipe and the lower sand control screen pipe is sleeved with a leather cup device which can allow liquid in the air of the oil supply sleeve ring to pass through or block the annular space of the oil sleeve, and the top end of the lower sand control screen pipe is fixed with a check valve.
In a preferred embodiment of the present invention, the leather cup device is made of rubber.
In a preferred embodiment of the present invention, a lower oil pipe is fixed between the upper sand control screen pipe and the check valve, and the leather cup device is fixed on the outer wall of the lower oil pipe.
In a preferred embodiment of the present invention, the lower end of the sand control screen is fixedly connected with a plug.
In a preferred embodiment of the present invention, the oil pump, the upper sand control screen, the lower oil pipe, the check valve, the lower sand control screen and the plug are all connected by threads.
In a preferred embodiment of the present invention, the oil well pump, the upper sand control screen, the lower oil pipe, the check valve, the lower sand control screen and the plug have the same outer diameter.
The utility model also provides an oil gas production pipe column, which comprises the leakage-proof cleaning device under the pump and an oil feeding pipe; the upper end of the oil well pump is fixedly connected with the lower end of the upper oil pipe.
In a preferred embodiment of the present invention, the utility model further comprises a vertically arranged sleeve; the upper oil pipe and the lower pump anti-leakage cleaning device are inserted in the sleeve.
In a preferred embodiment of the present invention, the outer diameter of the cup device is smaller than the inner diameter of the sleeve.
In a preferred embodiment of the present invention, the gap between the outer wall of the cup device and the inner wall of the sleeve is 3-5 mm.
From above, the utility model provides a characteristic of utilizing the leather cup device ingeniously under pump leak protection belt cleaning device and oil gas production tubular column washs the operation and go into the oil jacket annular space with the flushing fluid pump after, the leather cup device can expand automatically and shutoff oil jacket annular space to when wasing pump barrel and upper portion tubular column, can prevent that the flushing fluid from getting into the oil layer section of leaking, and then avoid the flushing fluid to get into the oil layer and the reservoir pollution that causes, improved the cleaning efficiency simultaneously.
Drawings
The drawings are only intended to illustrate and explain the present invention and do not limit the scope of the invention. Wherein:
FIG. 1: do the utility model provides a structural schematic of oil gas production tubular column when the packing cup device is in the contraction state.
FIG. 2: do the utility model provides a structural schematic of oil gas production tubular column when the packing cup device is in the inflation open mode.
Wherein the arrows in fig. 1 indicate the flow path of the oil production fluid during oil and gas production and the arrows in fig. 2 indicate the flow path of the well-flushing fluid during the flushing operation.
The reference numbers illustrate:
1. feeding an oil pipe; 2. an oil well pump; 3. mounting a sand control screen pipe; 4. discharging an oil pipe; 5. a cup device; 6. a check valve; 7. setting a sand control screen pipe; 8. plugging with a thread; 9. a sleeve.
Detailed Description
In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described with reference to the accompanying drawings.
As shown in fig. 1 and 2, the embodiment provides a pump-down leakage-proof cleaning device, which comprises an oil well pump 2, an upper sand control screen 3 and a lower sand control screen 7, which are vertically arranged and fixedly connected in sequence from top to bottom, wherein a leather cup device 5 capable of allowing liquid in the air of an oil supply sleeve to pass through or blocking the annular space of the oil sleeve is sleeved on the pipe wall between the upper sand control screen 3 and the lower sand control screen 7, and a check valve 6 is fixed at the top end of the lower sand control screen 7.
Wherein, the check valve 6 is located the below position of leather cup device 5, and foretell oil-well pump 2 can adopt the oil-well pump 2 of current oil field universal application, has travelling valve and standing valve in. The upper sand screen 3 and the lower sand screen 7 may be sand screens commonly used in the oil field, such as a slot-type screen or a throat-type screen. The leather cup device 5 is an annular rubber part, can adopt the leather cup device 5 commonly used in the existing oilfield field, and is mainly characterized in that when external fluid passes through the leather cup device, throttling action is generated, throttling pressure difference is generated, the leather cup device expands when the pressure is increased to a specific value, and the leather cup device contracts when the pressure is reduced. The check valve 6 mainly plays a role of single flow, only allows liquid to pass through from bottom to top, but not from top to bottom, so that well washing liquid is prevented from flowing into an oil layer through the lower sand control screen pipe 7 at the lower part after entering the inner part of the upper sand control screen pipe 3 during cleaning operation.
To foretell oil-well pump 2, go up sand control screen pipe 3, lower sand control screen pipe 7, leather cup device 5 and single current valve 6 concrete structure be prior art, the utility model discloses do not inject this.
Thus, when the anti-leakage cleaning device under the pump is used, when the cleaning device under the pump is put into a specified position in the sleeve 9, after the flushing liquid is pumped into the annular space of the oil sleeve on the ground, when the pressure in the air of the oil sleeve ring rises to a specific value, the leather cup device 5 expands to further seal the annular space of the oil sleeve, at the moment, the flushing liquid enters the inner part of the oil sleeve from the sand control screen pipe 3, and then the flushing pump cylinder and the upper pipe column return out from the ground. After the pressure in the air of the oil sleeve ring is reduced, the leather cup device 5 is contracted, and the oil sleeve ring space is unsealed.
From this, leak protection belt cleaning device utilizes the characteristic of leather cup device 5 ingeniously under the pump in this embodiment, after cleaning the operation and pump the flushing fluid into the oil jacket annular space, leather cup device 5 can expand automatically and shutoff oil jacket annular space to when wasing pump barrel and upper portion tubular column, can prevent that the flushing fluid from getting into the oil layer section of leaking, and then avoid the flushing fluid to get into the oil layer and the reservoir pollution that causes, improved the cleaning efficiency simultaneously.
In a specific implementation mode, a lower oil pipe 4 is fixed between the upper sand control screen pipe 3 and the check valve 6, and a leather cup device 5 is sleeved and fixed on the outer wall of the lower oil pipe 4. In order to prevent oil production liquid from entering the lower sand control screen pipe 7 from the bottom thereof, the lower end of the lower sand control screen pipe 7 is fixedly connected with a plug 8. The plug 8 is of an existing structure, and is not described herein again.
In practical application, the oil feeding pipe 1, the oil well pump 2, the sand control screen pipe 3, the oil discharging pipe 4, the check valve 6, the sand control screen pipe 7 and the plug 8 are connected by threads. The external diameters of the oil feeding pipe 1, the oil well pump 2, the sand control screen pipe 3, the oil discharging pipe 4, the check valve 6, the sand control screen pipe 7 and the plug 8 are the same.
As shown in fig. 1 and 2, the present embodiment further provides an oil and gas production string, which includes the above-mentioned leakage-proof cleaning device under pump and the oil feeding pipe 1, and the upper end of the oil well pump 2 is fixedly connected to the lower end of the oil feeding pipe 1.
Particularly, the oil and gas production pipe column further comprises a vertically arranged sleeve 9, and the upper oil pipe 1 and the pump lower anti-leakage cleaning device are inserted into the sleeve 9. The external diameter of leather cup device 5 is less than the internal diameter of sleeve pipe 9, and in order to guarantee the sealed effect of leather cup device 5 inflation back and sleeve pipe 9 inner wall, the clearance between the outer wall of leather cup device 5 and the inner wall of sleeve pipe 9 is preferred 3 ~ 5 mm.
In order to better understand the scheme of the embodiment, the following describes the working process of the whole oil and gas production string in the embodiment in detail with reference to fig. 1 and 2, specifically as follows:
in going into sleeve pipe 9 after being connected oil pipe 1 and belt cleaning device, because the tubular column is at the in-process of going into down, there is not pressure in the oil jacket annular space, and leather cup device 5 is in the contraction state this moment, can be with the tubular column normally down to design well depth position, and then carry out normal oil gas production.
In the oil-gas production process, the leather cup device 5 is in a contraction state at the moment, the flow path of the oil layer production liquid is shown by an arrow in figure 1, the oil layer production liquid enters an oil sleeve annulus from an oil layer, one part of the oil layer production liquid enters the lower sand control screen pipe 7, flows upwards through the check valve 6, continues to flow upwards through the oil well pump 2 and finally is produced into the ground; the other part enters the upper sand control screen pipe 3 and directly flows upwards through the oil well pump 2 to produce the ground. It should be noted that, in the oil and gas production process, the oil production fluid mainly enters from the lower sand control screen pipe 7, goes upward from the gap between the outer wall of the cup device 5 and the inner wall of the casing pipe 9, and the oil production fluid entering the upper sand control screen pipe 3 has less volume, and the cup device 5 cannot expand in the process. Of course, in special cases, the cup device 5 may expand to seal off the oil casing annulus, but this does not affect the overall oil and gas production.
In the process of cleaning the pump cylinder and the upper pipe column, the flow path of the flushing fluid is shown by an arrow in fig. 2, the flushing fluid is pumped into an oil sleeve annulus from the ground and flows downwards to the position near the leather cup device 5, throttling is generated at a gap between the outer wall of the leather cup device 5 and the inner wall of the sleeve 9, the pressure of the oil sleeve annulus on the upper part of the leather cup device 5 is increased, when the pressure is increased to a specific value (namely expansion pressure), the leather cup device 5 expands and blocks the oil sleeve annulus, the flushing fluid enters the upper sand control screen pipe 3 from the upper sand control screen pipe 3, and under the action of the annular pressure, the flushing fluid flows upwards along the upper sand control screen pipe 3. And pumping the flushing fluid into the ground continuously, continuously expanding the cup device 5 to be in closer contact with the inner wall of the sleeve 9, and flushing the pump barrel and the upper pipe column with the flushing fluid and then returning the flushing fluid out of the ground from the oil pipe. The expansion pressure of the leather cup device 5 is related to the material and size of the leather cup device 5, and is generally set to be 5-6 MPa.
After the construction is finished, after the pressure in the air of the oil sleeve ring is reduced, the leather cup device 5 is contracted, and the oil sleeve ring space is unsealed.
In addition, the under-pump leak-proof cleaning device in the present embodiment is mainly used for an oil well with a serious oil leak, and can prevent the flushing fluid from entering the leaking oil interval when cleaning the pump barrel and the upper string thereof. Of course, the cleaning device in the embodiment can also be applied to an oil well with less serious oil layer leakage, and can further prevent the well-flushing liquid from leaking into the oil layer during cleaning.
The above are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention. Any person skilled in the art should also realize that such equivalent changes and modifications can be made without departing from the spirit and principles of the present invention.
Claims (10)
1. The anti-leakage cleaning device under the pump is characterized by comprising an oil well pump, an upper sand control screen pipe and a lower sand control screen pipe which are vertically arranged and fixedly connected in sequence from top to bottom;
the pipe wall between the upper sand control screen pipe and the lower sand control screen pipe is sleeved with a leather cup device which can allow liquid in the air of the oil jacket ring to pass through or block the oil jacket annulus, and the top end of the lower sand control screen pipe is fixed with a check valve.
2. The under-pump leak-proof cleaning apparatus according to claim 1,
the leather cup device is made of rubber.
3. The under-pump leak-proof cleaning apparatus according to claim 1,
an oil discharging pipe is fixed between the upper sand control screen pipe and the check valve, and the leather cup device is sleeved and fixed on the outer wall of the oil discharging pipe.
4. The under-pump leak-proof cleaning apparatus according to claim 3,
and the lower end of the lower sand control screen pipe is fixedly connected with a plug.
5. The under-pump leak-proof cleaning apparatus according to claim 4,
the oil well pump, the sand control screen pipe, the oil outlet pipe, the check valve, the sand control screen pipe and the plug are all in threaded connection.
6. The under-pump leak-proof cleaning apparatus according to claim 4,
the oil well pump, the sand control screen pipe, the oil outlet pipe, the check valve, the sand control screen pipe and the plug have the same outer diameter.
7. An oil and gas production string comprising the pump-down leak-proof cleaning apparatus of any one of claims 1 to 6 and an upper tubing;
the upper end of the oil well pump is fixedly connected with the lower end of the upper oil pipe.
8. The oil and gas production string of claim 7, further comprising a vertically disposed casing;
the upper oil pipe and the lower pump anti-leakage cleaning device are inserted in the sleeve.
9. The hydrocarbon production string of claim 8,
the outer diameter of the cup packing device is smaller than the inner diameter of the sleeve.
10. The hydrocarbon production string of claim 9,
the clearance between the outer wall of the leather cup device and the inner wall of the sleeve is 3-5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921854092.4U CN211448620U (en) | 2019-10-30 | 2019-10-30 | Leakage-proof cleaning device under pump and oil gas production pipe column |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921854092.4U CN211448620U (en) | 2019-10-30 | 2019-10-30 | Leakage-proof cleaning device under pump and oil gas production pipe column |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211448620U true CN211448620U (en) | 2020-09-08 |
Family
ID=72298532
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921854092.4U Active CN211448620U (en) | 2019-10-30 | 2019-10-30 | Leakage-proof cleaning device under pump and oil gas production pipe column |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211448620U (en) |
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2019
- 2019-10-30 CN CN201921854092.4U patent/CN211448620U/en active Active
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