CN211819260U - Sand washing process pipe column for sand-buried production oil layer of oil-water well of thickened oil block - Google Patents
Sand washing process pipe column for sand-buried production oil layer of oil-water well of thickened oil block Download PDFInfo
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- CN211819260U CN211819260U CN202020359808.XU CN202020359808U CN211819260U CN 211819260 U CN211819260 U CN 211819260U CN 202020359808 U CN202020359808 U CN 202020359808U CN 211819260 U CN211819260 U CN 211819260U
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Abstract
The utility model discloses a viscous crude block oil-water well sand buries production oil blanket washing sand technology tubular column, include: the sand washing device comprises a sand washing outer pipe column and a sand washing inner pipe column, wherein a first check valve and a second check valve are installed on the sand washing inner pipe column, the first check valve is positioned below the second check valve, the outlet of the first check valve faces downwards, and the outlet of the second check valve faces upwards; a forward and reverse shunting liquid reversing short joint is arranged on the sand washing outer pipe column; the inlet at the upper end of the first check valve is connected and communicated with the lower end of the inner pipe of the forward and reverse flow-dividing liquid reversing short circuit, and the inlet at the lower end of the second check valve is connected and communicated with the upper end of the inner pipe of the forward and reverse flow-dividing liquid reversing short circuit. The utility model discloses make oil sludge sand bury production oil layer well can continuous production, the normal production cycle of extension oil-water well, the result of use ideal.
Description
Technical Field
The utility model belongs to the technical field of the oil gas field exploitation technique and specifically relates to a viscous crude block oil-water well sand buries production oil reservoir washing sand technology tubular column.
Background
In the process of oil field development, water well water injection is used for maintaining stratum energy, and oil production by using an oil well is a common development mode.
In the process of oil extraction of the water well water injection oil well, oil sludge sand in a loose stratum can enter a shaft along with liquid entering the shaft due to the pressure relief and the pumping action of the oil well, and can gradually sink to the bottom of the shaft due to the specific gravity of the oil sludge sand being greater than that of the carried liquid. Along with the gradual increase of oil sludge and sand sunk into the shaft, the shaft can be gradually buried to produce an oil layer, so that the oil-water well can not normally produce. Therefore, it is very important to develop shaft sand washing to ensure that the oil layer is exposed and the normal production of the oil-water well is ensured.
At present, the main method for solving the problem of oil reservoir production by oil sludge sand landfill in a shaft is to provide liquid for shaft circulating sand washing by using a sand washing pipe column and a surface cement truck. There are major problems: one method is to use a positive circulation to perform wellbore sand wash. The advantages are small inner diameter of sand washing pipe column, fast liquid flowing out speed, strong impact force, and fast sand washing speed, and can be hollowed out to a depth of 4-5m below the nose tip of sand washing. The defects are that the annular space of the oil sleeve is large, the upward return speed of the flushed oil sludge sand is slow, and if larger particles exist, the sand flushing pipe column is easy to block. One method is to perform wellbore sand wash using reverse circulation. The sand washing pipe column has the advantages that the inner diameter of the sand washing pipe column is small, the liquid return speed is high, larger particles can be taken out, and the sand washing pipe column is not easy to clamp. The oil sleeve has the defects of large annular space, weak impact force, capability of hollowing the depth of about 0.5m below a sand washing pen point, very low sand washing speed and easy pollution to stratum. If the sand surface of the well bore is cemented, the sand surface is basically fixed due to weak impact force.
The two methods can basically maintain production at present, but the workload is large in the construction process, the efficiency is low, a time-saving and labor-saving method is required to solve the production problem in order to thoroughly solve the difficulty in the shaft sand washing process, and the working efficiency is improved.
Application No.: 201720877567.6, filing date: 2017-07-19 discloses an oil well sand washing pipe column and an oil well sand washing system, which relate to the field of petroleum engineering, and the oil well sand washing pipe column comprises: a first bypass flow through the bridge tube; the inner pipe is connected with the first branch flow bridge pipe and is provided with a diffusion opening which is expanded upwards vertically and communicated with the second flow channel; a second shunt bridge pipe connected to the lower end of the inner pipe; the inflow mechanism comprises a screen pipe connected to the lower end of the second shunt bridge pipe; the telescopic mechanism comprises N telescopic pipes which are sequentially sleeved, the adjacent telescopic pipes can slide to enable the length of the telescopic mechanism in the vertical direction to extend, and the lower end of the middle telescopic pipe is provided with a sand washing device. The utility model provides an oil well sand washing tubular column can effectively reduce the pollution and the destruction of oil well sand washing construction to the oil reservoir, dismantles and installs the operating time that consumes of hose line once more when needing to connect oil pipe in the reduction sand washing work progress.
Application No.: 201610965703.7, filing date: 2016-11-04 discloses a controllable formula reposition of redundant personnel of hydraulic pressure for scraping pipe sand washing technology, including outer tubular column and inlayer tubular column, outer tubular column is including connecting in the biography pressure nipple joint that is provided with the pressure transmission hole of inlayer tubular column upper end outside, passes pressure nipple joint lower extreme and is connected with the piston, and the piston is provided with internal orifice and track along the circumference, the piston lower extreme is connected with the spring sleeve, and the piston outside cover is equipped with the reposition of redundant personnel urceolus of outband reposition of redundant personnel hole, and the piston chamber that passes sealedly to form and pass pressure hole intercommunication between reposition of redundant personnel urceolus, piston and the biography pressure nipple joint, reposition of redundant personnel urceolus lower part connect gradually urceolus, connecting pipe and the change nipple joint of being connected with outer tubular column. The invention can control the opening and closing of the tool in a hydraulic mode for the inner-layer tubular column, and realizes the communication and closing of the oil sleeve annulus and the outer-layer tubular column.
Application No.: 200720019136.2, filing date: 2007-03-07 discloses a downhole fluid reversing device used in the petroleum industry for well flushing operations in well workover operations. The device comprises a shunting mechanism and a shunting barrel, wherein the shunting mechanism is arranged in the shunting barrel. The device is connected to a fishing tool or a screw drilling tool, and is connected with a well by a joint of a well-descending pipe column. The labor intensity, the production cost and the operation time of workers are reduced, and the number of small well workovers changed into large well workovers is also reduced.
Application No.: 201821921306.0, filing date: 2018-11-20 discloses a sand washing process pipe column for a thick oil block, which mainly comprises a shunting short section, a shunting packer, a double-layer pipe, a reversing washing short section and a rotary washing tool, wherein the shunting short section, the shunting packer, the double-layer pipe, the reversing washing short section and the rotary washing tool are sequentially connected to form the sand washing process pipe column; the sand washing process pipe column is of a double-layer pipe structure and comprises an outer layer pipe column and an inner layer pipe column, when the sand washing process pipe column is used, the sand washing process pipe column is arranged in a downhole casing pipe, a first annular space is formed between the outer layer pipe column of the sand washing process pipe column and the downhole casing pipe, a second annular space is formed between the outer layer pipe column and the inner layer pipe column of the sand washing process pipe column, and the inner space of the inner layer pipe column of the sand washing process pipe column forms a central pipe flow channel. And for a well with large leakage, the jet pump is put into the central pipe flow channel, and certain negative pressure is caused when the sand washing liquid returns through the jet pump on the central pipe flow channel, so that negative pressure sand washing operation is realized.
Application No.: 201610810910.5, filing date: 2016-09-08 discloses an oil well pipe scraping and sand washing integrated device, which comprises a flow dividing short section, a flow dividing packer, a double-layer pipe body, a pipe scraper and a sand washing short section, wherein the flow dividing short section, the flow dividing packer, the double-layer pipe body, the pipe scraper and the sand washing short section are communicated with each other and are of a double-layer pipe structure; the scraping and sand washing method comprises the following steps: firstly, opening a pipe scraper, retracting a shunt packer, lowering the device into an oil well casing, and injecting a well washing liquid into the annular space of the casing to complete the pipe scraping and well washing; secondly, after the sand surface position is established, the scraper retracts and the shunt packer is set; then, injecting sand washing liquid into the annular space of the casing, and washing the bottom of the well by adopting positive pressure sand washing or negative pressure sand washing; and finally, deblocking the shunt packer and tripping the drill. The invention can realize the operations of scraping the pipe and washing the sand in one time, can wash the sand in positive pressure and wash the sand in negative pressure aiming at the stratum leakage condition, reduce the risk of the drilling operation, improve the efficiency of the operation of scraping the pipe and washing the sand, shorten the period of the well completion operation and reduce the cost of the well completion operation.
Technical scheme and the technical problem that will solve and the beneficial effect who produces of above disclosure technique all with the utility model discloses inequality, perhaps technical field or application scenario are different, are directed to the utility model discloses more technical problem and the beneficial effect that will solve, above open technical document all do not have the technological inspiration.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problems existing in the prior art, the oil-contained silt buries the production oil-well to realize continuous production, the normal production period of the oil-water well is prolonged, and the using effect is ideal.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a sand washing process pipe column for a sand-buried production oil layer of an oil-water well of a thickened oil block comprises:
the sand washing outer pipe column is arranged in the sleeve, and an annular space between the inner wall of the sleeve and the outer wall of the sand washing outer pipe column is called as an oil sleeve annulus;
the sand washing inner pipe column is arranged in the sand washing outer pipe column, and an annular space between the inner wall of the sand washing outer pipe column and the outer wall of the sand washing inner pipe column is called a production annulus;
a first check valve and a second check valve are installed on the sand washing inner pipe column, the first check valve is positioned below the second check valve, the outlet of the first check valve faces downwards, and the outlet of the second check valve faces upwards;
the sand washing outer pipe column is provided with a forward and reverse shunting liquid reversing short joint, namely, the outer pipe of the forward and reverse shunting liquid reversing short joint is connected with the sand washing outer pipe column; the inner pipe of the forward and reverse shunting liquid reversing short joint is provided with a radial through hole, so that the outer pipe of the forward and reverse shunting liquid reversing short joint is radially communicated with the inner pipe of the forward and reverse shunting liquid reversing short joint;
the inlet at the upper end of the first check valve is connected and communicated with the lower end of the inner pipe of the forward and reverse flow-dividing liquid reversing short circuit, and the inlet at the lower end of the second check valve is connected and communicated with the upper end of the inner pipe of the forward and reverse flow-dividing liquid reversing short circuit.
Further, still include:
the upper end of the sand washing pen point is connected with the lower end of the sand washing inner tubular column, and the lower end of the sand washing pen point faces the artificial well bottom.
Further, still include:
the reposition of redundant personnel short circuit, the reposition of redundant personnel short circuit is connected on the outer tubular column of sand washing, and the reposition of redundant personnel short circuit makes sleeve pipe and outer tubular column of sand washing communicate each other, the position that the reposition of redundant personnel short circuit was located is higher than positive and negative reposition of redundant personnel liquid switching-over short circuit.
Further, still include:
the upper port of the small pipe hanger is connected with a sand washing outer pipe column, and the lower port of the small pipe hanger is connected with a sand washing inner pipe column, namely the sand washing inner pipe column is hung in the sand washing outer pipe column through the small pipe hanger.
Further, the small pipe hanger is located at a position higher than the shunt short.
Furthermore, a packer is arranged on the sand washing outer pipe column and axially seals the oil sleeve annulus.
Further, the packer is located at a position lower than the shunt short circuit.
Compared with the prior art, the utility model following beneficial effect has:
the sand washing pen point is positioned at the bottom of the sand washing process pipe column, and the advantages of small pipe diameter and large water flow scouring force are mainly utilized for fast sand washing. The guide function is realized because the guide device is positioned at the bottommost part of the whole process pipe column.
The sand washing inner pipe column is located inside the whole sand washing process pipe column and mainly comprises a plurality of thin oil pipes, under the action of the forward and reverse shunting liquid reversing short circuit, the pipe column located on the lower portion of the forward and reverse shunting short circuit is responsible for water flow to move downwards from top to bottom and is finally input to a pen point for sand washing, the pipe column located on the upper portion of the forward and reverse shunting short circuit is responsible for water flow to move upwards from bottom to top, sand washing liquid and oil sludge sand are carried to return to the ground quickly, and oil sludge sand is effectively prevented from being stuck to the pipe column due to the fact that the oil sludge.
The first check valve is positioned in the pipe column at the lower part of the forward and reverse shunt short circuit and mainly used for enabling sand washing liquid to flow from top to bottom, so that the sand washing liquid can flow in a single direction, and the liquid cannot return from the pipe column when sand washing is stopped.
The forward and reverse flow-dividing liquid reversing short joint is connected into the sand washing outer pipe and mainly used for reversing the sand washing liquid between the sand washing outer pipe column and the sand washing inner pipe column at the upper part into the sand washing inner pipe column for sand washing. The sand washing liquid and the oil sludge sand between the sand washing outer pipe column and the sand washing inner pipe column at the lower part are reversed to the sand washing inner pipe column to be timely returned to the ground.
The second check valve is positioned in the pipe column at the upper part of the forward and reverse shunt short circuit and mainly used for enabling the sand washing liquid and the oil sludge sand to flow from bottom to top, ensuring the one-way flow of the sand washing liquid and the oil sludge sand, and preventing the liquid and the oil sludge sand from returning and sinking from the pipe column when the sand washing is stopped.
The packer is positioned in the space of the oil sleeve ring, plays a role in sealing, and ensures that liquid above and below the packer is not mixed and does not circulate.
The shunt short joint is connected in the sand washing outer pipe and positioned at the lower part of the small pipe hanger and mainly used for enabling the sand washing liquid outside the oil sleeve annulus to be reversed to the sand washing outer pipe column to descend.
The small pipe hanger is connected in the sand washing outer pipe and mainly used for hanging the small pipe and sealing the sand washing inner pipe and the sand washing outer pipe.
The sand washing outer pipe column is positioned outside the whole sand washing process pipe column and mainly comprises a plurality of common oil pipes, and under the action of the shunt short circuit and the forward and reverse shunt short circuits, sand washing liquid flows into a sand washing pen point step by step from an oil sleeve annulus to wash sand.
The utility model discloses an implementation of this set of technology tubular column has solved the difficult problem of oil-water well sand washing, has guaranteed the normal continuous production of oil-water well, has prolonged the life-span of oil-water well production. The effect is very obvious through field use.
Drawings
Fig. 1 is a schematic structural view of the sand washing process pipe column for the oil-water well sand-buried production oil layer of the thickened oil block of the utility model.
In the figure: 1: a sleeve; 2: washing the sand outer pipe column; 3: a small pipe hanger; 4: shunting short circuit; 5: a packer; 6: a second check valve; 7: the forward and reverse flow-dividing liquid reversing short circuit; 8: a first check valve; 9: washing the sand inner pipe column; 10: a sand washing pen point; 11: settling sand; 12: and (5) artificial well bottom.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example 1:
referring to fig. 1, the present invention provides a technical solution:
a sand washing process pipe column for a sand-buried production oil layer of an oil-water well of a thickened oil block comprises:
the sand washing outer pipe column 2 is arranged in the sleeve 1, and an annular space between the inner wall of the sleeve and the outer wall of the sand washing outer pipe column is called an oil sleeve annulus;
the sand washing inner pipe column 9 is arranged in the sand washing outer pipe column, and an annular space between the inner wall of the sand washing outer pipe column and the outer wall of the sand washing inner pipe column is called a production annulus;
a first check valve 8 and a second check valve 6 are installed on the sand washing inner pipe column, the first check valve is positioned below the second check valve, the outlet of the first check valve faces downwards, and the outlet of the second check valve faces upwards;
a forward and reverse shunting liquid reversing short joint 7 is arranged on the sand washing outer pipe column, namely, the outer pipe of the forward and reverse shunting liquid reversing short joint is connected with the sand washing outer pipe column; the inner pipe of the forward and reverse shunting liquid reversing short joint is provided with a radial through hole, so that the outer pipe of the forward and reverse shunting liquid reversing short joint is radially communicated with the inner pipe of the forward and reverse shunting liquid reversing short joint; the forward and reverse flow-dividing liquid reversing short circuit 7 belongs to the general known technology in the field and can be directly applied. Of course, other components are well known in the art, such as a check valve, a pen tip, a shunt short, a hanger, etc., and may be purchased or used directly, and will not be described further below.
The inlet at the upper end of the first check valve is connected and communicated with the lower end of the inner pipe of the forward and reverse flow-dividing liquid reversing short circuit, and the inlet at the lower end of the second check valve is connected and communicated with the upper end of the inner pipe of the forward and reverse flow-dividing liquid reversing short circuit.
Further, still include:
the upper end of the sand washing pen point is connected with the lower end of the sand washing inner tubular column, and the lower end of the sand washing pen point faces the artificial well bottom 12.
Further, still include:
shunt short circuit 4, the shunt short circuit is connected on the outer tubular column of sand washing, and the shunt short circuit makes sleeve pipe and outer tubular column of sand washing communicate each other, the position that the shunt short circuit was located is higher than positive and negative reposition of redundant personnel liquid switching-over short circuit.
Further, still include:
and the upper port of the small pipe hanger is connected with a sand washing outer pipe column, and the lower port of the small pipe hanger is connected with a sand washing inner pipe column, namely the sand washing inner pipe column is hung in the sand washing outer pipe column through the small pipe hanger.
Further, the small pipe hanger is located at a position higher than the shunt short.
Furthermore, a packer 5 is arranged on the sand washing outer pipe column, and the packer axially seals the oil sleeve annulus.
Further, the packer is located at a position lower than the shunt short circuit.
The sand washing pen point is positioned at the bottom of the sand washing process pipe column, and the advantages of small pipe diameter and large water flow scouring force are mainly utilized for fast sand washing. The guide function is realized because the guide device is positioned at the bottommost part of the whole process pipe column.
The sand washing inner pipe column is located inside the whole sand washing process pipe column and mainly comprises a plurality of thin oil pipes, under the action of the forward and reverse shunting liquid reversing short circuit, the pipe column located on the lower portion of the forward and reverse shunting short circuit is responsible for water flow to move downwards from top to bottom and is finally input to a pen point for sand washing, the pipe column located on the upper portion of the forward and reverse shunting short circuit is responsible for water flow to move upwards from bottom to top, sand washing liquid and oil sludge sand are carried to return to the ground quickly, and oil sludge sand is effectively prevented from being stuck to the pipe column due to the fact that the oil sludge sand.
The first check valve is positioned in the pipe column at the lower part of the forward and reverse shunt short circuit and mainly used for enabling sand washing liquid to flow from top to bottom, so that the sand washing liquid is enabled to flow in a one-way mode, and the liquid does not return from the pipe column when sand washing is stopped.
The forward and reverse flow-dividing liquid reversing short joint is connected into the sand washing outer pipe and mainly used for reversing the sand washing liquid between the sand washing outer pipe column and the sand washing inner pipe column at the upper part into the sand washing inner pipe column for sand washing. The sand washing liquid and the oil sludge sand between the sand washing outer pipe column and the sand washing inner pipe column at the lower part are reversed to the sand washing inner pipe column to be timely returned to the ground.
The second check valve is positioned in the pipe column at the upper part of the forward and reverse shunt short circuit and mainly used for enabling the sand washing liquid and the oil sludge sand to flow from bottom to top, ensuring the one-way flow of the sand washing liquid and the oil sludge sand, and preventing the liquid and the oil sludge sand from returning and sinking from the bottom of the pipe column when the sand washing is stopped.
The packer is positioned in the space of the oil sleeve ring, plays a role in sealing, and ensures that liquid above and below the packer is not mixed and does not circulate.
The shunt short joint is connected in the sand washing outer pipe and positioned at the lower part of the small pipe hanger and mainly used for enabling the sand washing liquid outside the oil sleeve annulus to be reversed to the sand washing outer pipe column to descend.
The small pipe hanger is connected in the sand washing outer pipe and mainly used for hanging the small pipe and sealing the sand washing inner pipe and the sand washing outer pipe.
The sand washing outer pipe column is positioned outside the whole sand washing process pipe column and mainly comprises a plurality of common oil pipes, and under the action of the shunt short circuit and the forward and reverse shunt short circuits, sand washing liquid flows into a sand washing pen point step by step from an oil sleeve annulus to wash sand.
When the sand washing process pipe column is installed, firstly, a sand washing pen point 10, a sand washing inner pipe column 9, a first check valve 8, a forward and reverse flow dividing liquid reversing short joint 7, a second check valve 6, a packer 5, a flow dividing short joint 4, a small pipe hanger 3 and a sand washing outer pipe column 2 are arranged below a well mouth. After the whole process pipe column is installed, pumping the sand washing liquid to the oil sleeve annulus through ground equipment, enabling the sand washing liquid to flow into a sand washing pen point step by step through the oil sleeve annulus to wash sand under the effects of the shunting short circuit and the forward and reverse shunting liquid reversing short circuit, enabling the sand washing liquid and the carried oil sludge sand to be discharged back to a sand washing outer pipe column step by step through a sand washing inner pipe column until the sand washing outer pipe column reaches the ground, sequentially circulating to a preset position to wash sand until the preset position is washed, and circulating to an outlet without oil sludge sand in large discharge.
Example 2:
referring to fig. 1, the present invention provides a technical solution:
a sand washing process pipe column for a sand-buried production oil layer of an oil-water well of a thickened oil block comprises:
the sand washing outer pipe column 2 is arranged in the sleeve 1, and an annular space between the inner wall of the sleeve and the outer wall of the sand washing outer pipe column is called an oil sleeve annulus;
the sand washing inner pipe column 9 is arranged in the sand washing outer pipe column, and an annular space between the inner wall of the sand washing outer pipe column and the outer wall of the sand washing inner pipe column is called a production annulus;
a first check valve 8 and a second check valve 6 are installed on the sand washing inner pipe column, the first check valve is positioned below the second check valve, the outlet of the first check valve faces downwards, and the outlet of the second check valve faces upwards;
a forward and reverse shunting liquid reversing short joint 7 is arranged on the sand washing outer pipe column, namely, the outer pipe of the forward and reverse shunting liquid reversing short joint is connected with the sand washing outer pipe column; the inner pipe of the forward and reverse shunting liquid reversing short joint is provided with a radial through hole, so that the outer pipe of the forward and reverse shunting liquid reversing short joint is radially communicated with the inner pipe of the forward and reverse shunting liquid reversing short joint; the forward and reverse flow-dividing liquid reversing short circuit 7 belongs to the general known technology in the field and can be directly applied.
The inlet at the upper end of the first check valve is connected and communicated with the lower end of the inner pipe of the forward and reverse flow-dividing liquid reversing short circuit, and the inlet at the lower end of the second check valve is connected and communicated with the upper end of the inner pipe of the forward and reverse flow-dividing liquid reversing short circuit.
Although fig. 1 is used for all the above embodiments, it is obvious to those skilled in the art that a separate drawing is not shown as long as the parts or structural features missing in the embodiments are removed from the drawing. As will be clear to the skilled person. Of course, the embodiments with more components are only the preferred embodiments, and the embodiments with fewer components are the basic embodiments, but the basic utility model objects can also be achieved, so all these are within the protection scope of the present invention.
All parts and parts which are not discussed in the present application and the connection mode of all parts and parts in the present application belong to the known technology in the technical field, and are not described again. Such as welding, threaded connections, etc.
In the present application, the term "plurality" means two or more unless expressly defined otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or unit indicated must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the present invention.
In the description of the present specification, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A sand washing process pipe column for a sand-buried production oil layer of an oil-water well of a thickened oil block comprises:
the sand washing outer pipe column is arranged in the sleeve, and an annular space between the inner wall of the sleeve and the outer wall of the sand washing outer pipe column is called as an oil sleeve annulus;
the sand washing inner pipe column is arranged in the sand washing outer pipe column, and an annular space between the inner wall of the sand washing outer pipe column and the outer wall of the sand washing inner pipe column is called a production annulus;
the sand washing device is characterized in that a first check valve and a second check valve are mounted on the sand washing inner pipe column, the first check valve is positioned below the second check valve, an outlet of the first check valve faces downwards, and an outlet of the second check valve faces upwards;
the sand washing outer pipe column is provided with a forward and reverse shunting liquid reversing short joint, namely, the outer pipe of the forward and reverse shunting liquid reversing short joint is connected with the sand washing outer pipe column; the inner pipe of the forward and reverse shunting liquid reversing short joint is provided with a radial through hole, so that the outer pipe of the forward and reverse shunting liquid reversing short joint is radially communicated with the inner pipe of the forward and reverse shunting liquid reversing short joint;
the inlet at the upper end of the first check valve is connected and communicated with the lower end of the inner pipe of the forward and reverse flow-dividing liquid reversing short circuit, and the inlet at the lower end of the second check valve is connected and communicated with the upper end of the inner pipe of the forward and reverse flow-dividing liquid reversing short circuit.
2. The thick oil block oil-water well sand-buried production oil layer sand washing process pipe column as claimed in claim 1, further comprising:
the upper end of the sand washing pen point is connected with the lower end of the sand washing inner tubular column, and the lower end of the sand washing pen point faces the artificial well bottom.
3. The heavy oil block oil-water well sand-burying production oil-bed sand-washing process pipe column as claimed in claim 1 or 2, further comprising:
the reposition of redundant personnel short circuit, the reposition of redundant personnel short circuit is connected on the outer tubular column of sand washing, and the reposition of redundant personnel short circuit makes sleeve pipe and outer tubular column of sand washing communicate each other, the position that the reposition of redundant personnel short circuit was located is higher than positive and negative reposition of redundant personnel liquid switching-over short circuit.
4. The thick oil block oil-water well sand-buried production oil layer sand washing process pipe column as claimed in claim 3, further comprising:
the upper port of the small pipe hanger is connected with a sand washing outer pipe column, and the lower port of the small pipe hanger is connected with a sand washing inner pipe column, namely the sand washing inner pipe column is hung in the sand washing outer pipe column through the small pipe hanger.
5. The heavy oil block oil-water well sand-burying production oil-bed sand-washing process tubular column as claimed in claim 4, wherein the small tubular hanger is located at a position higher than the shunt short joint.
6. The sand washing process pipe string of the sand-buried production oil layer of the thickened oil block oil-water well according to claim 4 or 5, wherein a packer is installed on the sand washing outer pipe string, and the packer axially seals the oil sleeve annulus.
7. The heavy oil block oil-water well sand-burying production oil-bed sand-washing process tubular column as claimed in claim 6, wherein the packer is located at a position lower than the shunt short joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020359808.XU CN211819260U (en) | 2020-03-20 | 2020-03-20 | Sand washing process pipe column for sand-buried production oil layer of oil-water well of thickened oil block |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020359808.XU CN211819260U (en) | 2020-03-20 | 2020-03-20 | Sand washing process pipe column for sand-buried production oil layer of oil-water well of thickened oil block |
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| CN211819260U true CN211819260U (en) | 2020-10-30 |
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| CN202020359808.XU Active CN211819260U (en) | 2020-03-20 | 2020-03-20 | Sand washing process pipe column for sand-buried production oil layer of oil-water well of thickened oil block |
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| CN112483038A (en) * | 2020-11-16 | 2021-03-12 | 东营百华石油技术开发有限公司 | Washable well slip supporting packer and method |
| CN115012878A (en) * | 2022-06-30 | 2022-09-06 | 西南石油大学 | Double-layer pipe-based inhibitor filling system for sulfur-containing gas well without production stop |
| CN119352914A (en) * | 2024-12-27 | 2025-01-24 | 中国石油大学(华东) | A double-layer tube internal and external fluid conversion and unification check valve |
-
2020
- 2020-03-20 CN CN202020359808.XU patent/CN211819260U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112483038A (en) * | 2020-11-16 | 2021-03-12 | 东营百华石油技术开发有限公司 | Washable well slip supporting packer and method |
| CN115012878A (en) * | 2022-06-30 | 2022-09-06 | 西南石油大学 | Double-layer pipe-based inhibitor filling system for sulfur-containing gas well without production stop |
| CN119352914A (en) * | 2024-12-27 | 2025-01-24 | 中国石油大学(华东) | A double-layer tube internal and external fluid conversion and unification check valve |
| CN119352914B (en) * | 2024-12-27 | 2025-04-08 | 中国石油大学(华东) | Double-layer pipe internal and external fluid conversion different direction communication check valve |
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