CN210396710U - Anti-breaking and anti-falling filling tool for oil-water well - Google Patents
Anti-breaking and anti-falling filling tool for oil-water well Download PDFInfo
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- CN210396710U CN210396710U CN201921131707.0U CN201921131707U CN210396710U CN 210396710 U CN210396710 U CN 210396710U CN 201921131707 U CN201921131707 U CN 201921131707U CN 210396710 U CN210396710 U CN 210396710U
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- valve body
- lower valve
- ball seat
- oil
- breaking
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Abstract
The utility model relates to an oil-water well prevents breaking and takes off and fills instrument includes valve body down, and lower valve body is equipped with down valve body ball seat and adapter sleeve, and lower valve body ball seat passes through pin joint with the adapter sleeve, and the both ends of adapter sleeve are connected with center tube and washing pipe joint respectively, and the body lower part of adapter sleeve is equipped with liquid flow groove or hole. Connecting the anti-breaking and anti-falling filling tool above the sand-proof pipe column and putting the anti-breaking and anti-falling filling tool into a designed position in a well, and after the opening pressure of a filling opening is pressed, exposing the filling opening of the filling tool, and performing forward extrusion filling construction from an oil pipe. The utility model discloses changed the design of traditional sand control packing instrument, divided into two parts of lower valve body ball seat and adapter sleeve with the valve body down, guaranteed the reliability of pin work. The problem of the pin on the lower valve body in the existing filling tool that the seat seal fails because of being cut in advance in the operation process is effectively solved, the success rate of filling construction is greatly improved, and the operation cost is effectively reduced.
Description
Technical Field
The utility model relates to a sand control operation instrument is filled in oil and water well's pit, especially a packing instrument is taken off absolutely in oil and water well preventing.
Background
The conventional filling sand prevention tool, such as 445-plus-115 filling tool, is provided with a sealing rubber cylinder assembly, an anchoring assembly and a reversing sleeve assembly, and is provided with two ball seats, one is arranged on the lower valve body, the other is arranged in a washing pipe joint, and the ball seat in the lower valve body is matched with a sealing ball for pressing. When the pressure is applied from the oil pipe, the rubber sleeve pushes the slips to be clamped on the sleeve, the sheath continues to be pressed to push the rubber sleeve, the rubber sleeve expands to seal the oil sleeve annulus, the slips are tightly clamped on the sleeve to support the anchoring sand control operation pipe column, and after the pressure is released, the filling tool is suspended to keep the well part and the sand filtering pipe part connected below the well part.
After the filling sand prevention tool is lowered to a designed position, a ball is thrown to press the seat seal and the filling channel is opened. Closing the casing, and squeezing and filling the stratum; opening the casing pipe, annular circulation filling, completing filling, reverse well flushing, forward releasing, raising the pipe column, closing the filling port, raising the connecting part of the filling tool above the releasing, and pumping directly for production.
However, the sand control filling tool has a low success rate of operation, and after the tool is lowered to a designed position, the pressing setting seal is not pressed frequently, so that the filling tool and the sand control pipe column are failed to set. The main reason is that the lower valve body in the filling tool is directly in threaded connection with the flushing pipe joint, and the pin on the lower valve body bears the weight of the flushing pipe connected below the flushing pipe joint and also bears the inertia force when the oil pipe is pulled out and pulled out. In the sand control well with multiple oil layers and long well sections in offshore oil fields and onshore oil fields, the length of the flushing pipe connected below is increased, and the weight is increased. Under the conditions that the sand control pipe column is lifted too fast, the pipe column is lowered too violently and the like, the stress exceeds the shearing force of the lower valve body connecting pin, the pin is sheared in advance, the setting failure is caused, the failure of the sand control pipe column in the well operation is also caused, and the current situations of low operation success rate and high operation cost are caused.
The above problems are urgently needed to be solved.
Disclosure of Invention
The utility model aims at providing a to the not enough of current instrument of filling existence, provide an oil-water well and prevent breaking off and fill instrument, avoid the pin to cut the emergence of the condition in advance, solve the operation failure that the seat seal failure caused, improve the success rate that the sand control was filled the construction, reduce the operating cost.
In order to solve the above problem, the utility model discloses a realize like this:
the utility model provides an oil-water well anti-breaking filling tool that takes off includes valve body down, and lower valve body is equipped with valve body ball seat and adapter sleeve down, and the valve body ball seat passes through pin joint with the adapter sleeve down, and the both ends of adapter sleeve are connected with center tube and washing pipe joint respectively, and the body lower part of adapter sleeve is equipped with liquid flow groove or hole.
And a receiving step is arranged in the inner cavity of the upper part of the connecting sleeve, a lower valve body ball seat can be seated in the receiving step, the outer circle of the upper part of the connecting sleeve is in threaded connection with the central pipe, and the outer circle of the lower part of the connecting sleeve is in threaded connection with the washing pipe joint.
The distance between the upper end surface of the receiving step of the connecting sleeve and the lower edge of the sand outlet of the central pipe is greater than the total length of the ball seat of the lower valve body.
The outer circle of the upper part of the connecting sleeve is larger than the outer circle of the lower part of the connecting sleeve, and the outer circle of the upper part of the connecting sleeve is smaller than the inner circle of the lower joint, a liquid flow wall clamping cavity is formed between the connecting sleeve and the lower joint and between the connecting sleeve and the buckle changing joint, and the liquid flow wall clamping cavity is communicated with a liquid flow channel of the filling tool.
The upper inner cavity of the lower valve body ball seat is a conical cavity and is matched with the input sealing ball, and the upper excircle of the lower valve body ball seat is larger than the lower excircle and forms a liquid flow annular space with the lower inner circle of the central tube.
The upper excircle of the lower valve body ball seat is provided with a sealing ring, and the distance between the sealing ring below the upper excircle and the upper sealing ring is greater than the height of the sand outlet of the central pipe.
Compare with current filling tool, the utility model discloses a show the effect and be, the utility model discloses changed the design that traditional sand control filled tool, divided into two parts of valve body ball seat and adapter sleeve down with the valve body down. The lower valve body ball seat is connected with the connecting sleeve through a pin, the upper part of the connecting sleeve is in threaded connection with the central pipe, and the lower part of the connecting sleeve is in threaded connection with the washing pipe joint. Therefore, the weight of the flushing pipe cannot be transferred to the pin of the ball seat of the lower valve body, the working reliability of the pin is guaranteed, and the problem that the pin on the lower valve body in the existing filling tool is cut in advance to cause the failure of seat sealing in the operation process is effectively solved.
The utility model discloses a technical transformation scheme is simple, the effect is showing, has improved the success rate of filling the construction greatly, has effectively reduced the operating cost. The method can meet the operation requirements of offshore large-inclination, multi-oil-layer, long-well-section sand control wells and land complex-operation sand control wells, has remarkable use effect and can obtain good economic benefit.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
The following detailed description of the present invention with reference to the drawings is not intended to limit the scope of the present invention, and all the modifications of the present invention belong to the protection category.
The utility model discloses will be described in further detail below with the accompanying drawing, refer to fig. 1, an oil-water well anti-break filling tool includes valve body down, and lower valve body is equipped with down valve body ball seat 15 and adapter sleeve 21, and lower valve body ball seat 15 passes through pin 18 with adapter sleeve 21 to be connected, and the both ends of adapter sleeve 21 are connected with center tube 3 and wash union coupling 22 respectively, and the body lower part of adapter sleeve 21 is equipped with liquid flow groove or hole, washes union coupling 22 upper portion and is equipped with the ball seat, the lower part is connected with the wash union coupling. The upper end of a central tube 3 of the tool is in threaded connection with an upper joint 1, and the lower end of the central tube is sequentially connected with a connecting sleeve 21 and a pipe flushing joint 22 through threads, a connecting step in the middle of the central tube 3 is provided with a left-handed external thread which is connected with an outer tube 9, a rubber cylinder assembly and an anchoring assembly are connected to the outside of the central tube 3 through the outer tube 9, and a longitudinal liquid flow groove is formed in the left-handed external thread of the connecting step of the central tube 3. The lower cone 14 of the anchoring assembly is also internally provided with a reversing sleeve assembly which comprises a reversing sleeve, a sealing sleeve 16 and a spring 17. The sealing sleeve 16 and the spring 17 are arranged in the reversing sleeve, and the sealing sleeve 16 can move upwards under the thrust of the spring 17 to close the sand outlet on the reversing sleeve. The filling port of the tool consists of a sand outlet of the central tube 3 and a sand outlet of the lower cone 14. The sand outlet of the lower cone 14 is closed, which closes the filling opening of the filling tool. The overshot 5 is connected with the seat seal sliding sleeve 4 and the outer pipe 9 through a seat seal pin I6 and a seat seal pin II 10 respectively.
The inner cavity of the upper part of the connecting sleeve 21 is provided with a receiving step, the receiving step can be seated in the lower valve body ball seat 15, the outer circle of the upper part of the connecting sleeve 21 is in threaded connection with the central pipe 3, and the outer circle of the lower part of the connecting sleeve 21 is in threaded connection with the washing pipe joint 22.
The distance between the upper end surface of the receiving step of the connecting sleeve 21 and the lower edge of the sand outlet of the central tube 3 is greater than the total length of the lower valve body ball seat 15, and the sand outlet of the central tube 3 cannot be shielded after the lower valve body ball seat 15 is seated on the receiving step of the connecting sleeve 21.
The upper portion excircle of adapter sleeve 21 is greater than the lower part excircle, and the upper portion excircle still is less than the interior circle of lower clutch 20, forms the liquid stream between adapter sleeve 21 and lower clutch 20 and change knot joint 19 and presss from both sides the wall chamber, and this liquid stream presss from both sides the wall chamber and fills the liquid flow channel intercommunication of instrument, can realize reverse circulation well-flushing. When the filling tool is used for backwashing, liquid flow enters from the circulating hole in the seat seal sliding sleeve 4, and flows into the longitudinal liquid flow groove in the connecting step along the middle part of the central tube 3, the liquid flow annular gap between the central tube 3 and the outer tube 9 and the wall clamping cavity of the lower cone 14, and then flows into the inner cavity of the central tube 3 through the liquid flow groove or hole at the lower part of the connecting sleeve 21, and then flows upwards into the oil tube, so that backwashing is realized. Three sand outlets are uniformly distributed at the lower part of the lower cone 14, two layers of pipe bodies are welded between the sand outlets to form a wall clamping cavity, liquid can pass through the wall clamping cavity, the lower cone 14 is connected with the lower connector 20 through the buckle changing connector 19, and a liquid flow wall clamping cavity is formed between the lower connector 20, the buckle changing connector 19 and the connecting sleeve 21.
The upper inner cavity of the lower valve body ball seat 15 is a conical cavity and is matched with a thrown sealing ball, and the upper excircle of the lower valve body ball seat 15 is larger than the lower excircle and forms a liquid flow annular space with the lower inner circle of the central tube 3.
The distance between the sealing ring on the lower valve body ball seat 15 upper portion excircle is equipped with the sealing washer, is located the sealing washer of aforementioned upper portion excircle below to the top sealing washer is greater than the mouth height of the sand outlet of center tube 3, and before the filling opening of this instrument is opened in not suppressing, the sand outlet on the center tube 3 realizes sealedly.
The construction method for the anti-breaking and anti-falling filling tool for the oil-water well comprises the following steps:
A. connecting the anti-breaking and anti-falling filling tool above the sand-proof pipe column and putting the anti-breaking and anti-falling filling tool into a designed position in a well, firstly putting a sealing ball, and setting the sealing ball in a conical cavity at the upper part of a lower valve body ball seat 15;
B. pressing the setting pin I6 from the oil pipe, cutting off the setting pin I, and continuing pressing to expand the rubber cylinder 11 and firmly clamp the slip teeth of the slip 13 on the casing pipe to finish setting;
in the step B, the liquid pressure sequentially pushes the seat seal piston 2, the seat seal sliding sleeve 4 and the locking ring 7 to move downwards through a pressure transfer hole in the central pipe 3, and the seat seal pin I6 is cut off; meanwhile, the setting sliding sleeve 4 also sequentially pushes the sheath 8, the rubber cylinder 11, the upper cone 12 and the slips 13 to move downwards; along with the increase of the pressure and the downward movement of the setting sliding sleeve 4, a circulation port on the setting sliding sleeve 4 is exposed, the rubber cylinder 11 is tightly attached to the casing after being compressed and deformed, and the slips 13 are firmly anchored on the inner wall of the casing; rubber sleeve 11 has sealed the oil jacket annular space, plays the switching-over effect, and slips 13 plays the effect of anchoring connection this sand control tubular column of preventing taking off the packing instrument and can hang the effect of the sand screen that this packing instrument lower part is connected by lower clutch 20 after sand control tubular column realizes giving up.
C. After the pressure is continuously increased to the opening pressure of the filling opening, the pin 18 between the lower valve body ball seat 15 and the connecting sleeve 21 is cut off, the lower valve body ball seat 15 slides downwards to be seated on the receiving step of the connecting sleeve 21, and the filling opening of the filling tool is exposed;
D. closing the casing gate, performing positive extrusion filling construction from the oil pipe, allowing sand-carrying liquid or water to flow out of the filling port and enter the stratum through the sand filter pipe, leaving gravel outside the sand filter pipe, and allowing the liquid to enter the washing pipe joint 22 through the bottom of the washing pipe connected with the washing pipe joint 22;
E. opening a casing gate, performing positive circulation filling from the oil pipe, and enabling liquid to flow into the oil casing annulus from a filling port;
in the step E, the liquid pushes open the sealing ball on the flushing pipe joint 22, enters a liquid flow interlayer cavity through a liquid flow groove or a hole on the connecting sleeve 21, enters a liquid flow annular gap formed by the central pipe 3 and the outer pipe 9 through the interlayer cavity of the lower cone 14 in the anchoring assembly, and then reaches the connecting step of the central pipe 3 and the outer pipe 9, and the left-handed thread on the central pipe 3 is provided with a longitudinal liquid flow groove which allows the fluid to flow through; the liquid flow continues upwards to flow to the sleeve from the exposed circulation port at the upper part of the seat seal sliding sleeve 4 through the annular space formed by the central tube 3, the overshot 5 and the seat seal sliding sleeve 4 respectively, so that the positive circulation filling of the filling tool is realized.
F. After the positive circulation filling is finished, performing reverse circulation well flushing; and (3) washing out excessive sand grains, wherein a well washing liquid enters from the casing, enters through a circulating port at the upper part of the seat sealing sliding sleeve 4, downwards enters a cavity of the double wall of the lower cone 14, enters an inner cavity of the central tube 3 from a liquid flow groove or a hole of the connecting sleeve 21, and then enters an oil tube, so that reverse circulation well washing is realized.
G. After reverse circulation well flushing, the sand control pipe column is lifted to the original hanging weight, and the hand is released in the forward rotation mode, so that the filling tool is separated from the well-reserved pipe column.
In the G step, after the reverse well washing is clean, the sand control pipe column is lifted to the original hanging weight, when the positive rotation is released, the upper joint 1 drives the central pipe 3 to rotate, the central pipe 3 and the outer pipe 9 are in left-handed threaded connection, and after the central pipe 3 and the outer pipe 9 rotate for a certain number of turns, the central pipe 3 is separated from the outer pipe 9. And lifting the sand control pipe column, wherein the upper joint 1 drives the central pipe 3, the seat sealing piston 2, the lower valve body ball seat 15, the connecting sleeve 21, the flushing pipe joint 22 and the flushing pipe connected with the flushing pipe joint 22 to be lifted out of the well. Simultaneously along with the shifting up of center tube 3, spring 17 of original card on the spring support step of center tube 3 promotes seal cover 16 and goes upward, closes this packing instrument's packing mouth, plays sand control tubular column, accomplishes whole sand control process.
The opening pressure of the filling port is set between 17MPa and 19 MPa.
The embodiments described above are merely exemplary embodiments, but the present invention is not limited to these embodiments, and those skilled in the art can make modifications without departing from the spirit and teaching of the present invention. Many variations, combinations, and modifications of the aspects disclosed herein are possible and are within the scope of the invention, which is, therefore, not to be limited by the above description.
Claims (6)
1. The utility model provides an oil-water well anti-breaking filling tool, includes lower valve body, characterized by, lower valve body is equipped with lower valve body ball seat (15) and adapter sleeve (21), and lower valve body ball seat (15) are connected through pin (18) with adapter sleeve (21), and the both ends of adapter sleeve (21) are connected with center tube (3) and wash union coupling (22) respectively, and the body lower part of adapter sleeve (21) is equipped with liquid flow groove or hole.
2. A breaking-off prevention filling tool for oil-water wells as claimed in claim 1, wherein a receiving step is provided in the upper inner cavity of the connecting sleeve (21), the receiving step can be seated in the lower valve body ball seat (15), the upper outer circle of the connecting sleeve (21) is in threaded connection with the central pipe (3), and the lower outer circle of the connecting sleeve (21) is in threaded connection with the flushing pipe joint (22).
3. A breaking-off prevention filling tool for oil and water wells as claimed in claim 2, wherein the distance from the upper end surface of the receiving step of the connecting sleeve (21) to the lower edge of the sand outlet of the central tube (3) is greater than the total length of the ball seat (15) of the lower valve body.
4. A tool for preventing the oil-water well from breaking off and filling as claimed in claim 1, 2 or 3, wherein the upper outer circle of the connecting sleeve (21) is larger than the lower outer circle and smaller than the inner circle of the lower joint (20), and a liquid flow cavity is formed between the connecting sleeve (21) and the lower joint (20) and between the connecting sleeve and the fastening joint (19), and is communicated with the liquid flow channel of the filling tool.
5. A breaking-off prevention filling tool for oil-water wells as claimed in claim 4, wherein the upper inner cavity of the lower valve body ball seat (15) is a conical cavity and is matched with the inserted sealing ball, and the upper outer circle of the lower valve body ball seat (15) is larger than the lower outer circle and forms a liquid flow annular space with the lower inner circle of the central tube (3).
6. A breaking-off prevention filling tool for oil-water wells as claimed in claim 5, wherein the upper outer circle of the ball seat (15) of the lower valve body is provided with a sealing ring, and the distance from the sealing ring below the upper outer circle to the upper sealing ring is larger than the height of the sand outlet of the central tube (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921131707.0U CN210396710U (en) | 2019-07-18 | 2019-07-18 | Anti-breaking and anti-falling filling tool for oil-water well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921131707.0U CN210396710U (en) | 2019-07-18 | 2019-07-18 | Anti-breaking and anti-falling filling tool for oil-water well |
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| Publication Number | Publication Date |
|---|---|
| CN210396710U true CN210396710U (en) | 2020-04-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921131707.0U Expired - Fee Related CN210396710U (en) | 2019-07-18 | 2019-07-18 | Anti-breaking and anti-falling filling tool for oil-water well |
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| CN (1) | CN210396710U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112240178A (en) * | 2019-07-18 | 2021-01-19 | 中石化石油工程技术服务有限公司 | Anti-breaking and anti-falling filling tool for oil-water well and construction method thereof |
-
2019
- 2019-07-18 CN CN201921131707.0U patent/CN210396710U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112240178A (en) * | 2019-07-18 | 2021-01-19 | 中石化石油工程技术服务有限公司 | Anti-breaking and anti-falling filling tool for oil-water well and construction method thereof |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200424 Termination date: 20210718 |