CN219570064U - Oil inlet prevention ball seat and separate injection pipe column - Google Patents
Oil inlet prevention ball seat and separate injection pipe column Download PDFInfo
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- CN219570064U CN219570064U CN202320107831.3U CN202320107831U CN219570064U CN 219570064 U CN219570064 U CN 219570064U CN 202320107831 U CN202320107831 U CN 202320107831U CN 219570064 U CN219570064 U CN 219570064U
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Abstract
The utility model belongs to the technical field of oil and gas exploitation equipment, and particularly relates to an oil inlet prevention ball seat and a separate injection pipe column. The oil inlet prevention ball seat comprises a tubular seat body and a piston, wherein the piston is provided with a sealing position and a conducting position positioned above the sealing position on the tubular seat body and is kept at the sealing position through a transposition shear pin, one of the piston and the tubular seat body is provided with a release shear pin, the other one of the piston and the tubular seat body is provided with a limiting groove matched with the release shear pin, the distance between the lower side wall of the limiting groove and the release shear pin in the axial direction of the tubular seat body is not less than the moving distance of the piston from the sealing position to the conducting position, and the shearing force of the release shear pin is greater than the pressure required by closing a backwashing channel of an adaptive packer. Through setting up spacing groove and the release shear pin that cooperates with it on one of piston or the tubular seat body respectively, when the piston is pressed down to move, owing to receive spacing groove and release shear pin cooperation to block to form sufficient pressure in the tubular column in order to close the backwash passageway of packer.
Description
Technical Field
The utility model belongs to the technical field of oil and gas exploitation equipment, and particularly relates to an oil inlet prevention ball seat and a separate injection pipe column.
Background
In the oil field exploitation process, the oil well recovery ratio is improved by adopting separate layer water injection, the common separate injection pipe column comprises a packer connected with the pipe column, a water distributor and a ball valve positioned at the bottom of the pipe column, the water injection quantity is often required to be detected through an instrument during water injection, oil and water in the stratum can flow back into a water injection well shaft due to the fact that the oil and water are communicated between the oil and water well layers and are affected by the water injection well stop injection and formation pressure change, the density of the oil is smaller than that of the water, and floating oil gathers in the shaft to form an oil cap. The conventional ball valve comprises ball and ball seat, when the well completion tubular column is gone into in the operation of sub-injection well in the pit, the sub-injection tubular column is when passing through the oil cap section, and the oil in the pit shaft gets into the sub-injection tubular column through the ball seat of bottom, and the adhesion is at tubular column and instrument inner wall, causes tubular column and instrument inner chamber to diminish, and the test instrument passes through the difficulty, leads to the test to meet and hinders, even needs to return to the industry.
The Chinese patent utility model with the authority of CN209742842U and the authority of 2018, 9 and 27 discloses a dispensing pipe column and an oil inlet prevention ball seat thereof, the dispensing pipe column comprises a tubular ball seat with a central channel, the tubular ball seat comprises a ball seat section, a conducting position and a sealing position, the conducting position and the sealing position are connected with the ball seat section and are sequentially arranged from top to bottom, a piston rod for sealing the central channel is arranged in the sealing position in a sealing and guiding manner, a shearable shear pin is connected between the sealing position and the piston rod, the conducting position is provided with a containing cavity for the piston rod to move upwards to be separated from the sealing position after the piston rod is sheared by upward pressure, a blocking part for blocking the piston rod upwards after the piston rod moves upwards to be separated from the sealing position in a sealing fit manner is arranged in the tubular seat, a flow guide channel for enabling the central channel to be conducted up and down is formed between the piston rod and the conducting position after the piston rod moves upwards to the conducting position under the pushing action, and an outlet for the piston rod to move downwards to leave the tubular seat body is arranged at the lower end of the tubular seat.
In the practical application process, when the oil inlet prevention ball seat is matched with the Y221 type packer with a backwashing function, a backwashing channel of the backwashing packer is initially in a closed state, and when the operation is completed, the oil inlet prevention ball seat is put into a separate injection string, when the separate injection string passes through an oil cap section, a piston rod seals the central channel through sealing fit of a shear pin and a sealing position, liquid in a shaft cannot enter the separate injection string, the pressure of the liquid column outside the separate injection string is larger than the pressure inside the separate injection string, an internal pressure difference and an external pressure difference push a backwashing valve of the packer to move upwards, and a backwashing well channel of the packer is opened; after the pipe column passes through the oil cap section, the pressure difference between the inside and the outside of the pipe column is gradually increased along with the continuous increase of the depth of the pipe column in the well, the hydraulic pressure outside the pipe column pushes the piston rod upwards, when the pressure reaches the shearing pressure of the shear pins, the shear pins shear, the piston rod is pushed to move upwards, at the moment, the liquid in the well enters the separate injection pipe column through the diversion channel, the pressure difference between the inside and the outside of the separate injection pipe column is at a relatively stable value, the backwash valve of the packer cannot be pushed to reset, and the backwash channel of the packer is still in an open state; after the packer is set to the set depth, the oil pipe is used for pressing and checking the sealing in the pipe column, the piston rod is pushed downwards to separate from the sealing position, the piston rod is separated from the outlet of the tubular base body, the pressure pushing the piston rod to move downwards cannot form enough internal and external pressure difference to close the backwash valve of the packer, the backwash channel of the packer is still in an open state, and the pressing liquid in the split injection pipe column can return from the backwash channel of the packer to enter the outside of the split injection pipe column during checking and sealing, so that the checking and sealing are unqualified, and the checking and sealing requirements cannot be met.
Disclosure of Invention
The utility model aims to provide an oil inlet prevention ball seat, which solves the problem that a backwashing channel cannot be closed after being opened when the oil inlet prevention ball seat is matched with a packer with a backwashing function in the prior art. The utility model also aims to provide a dispensing pipe column which solves the same problems.
In order to achieve the above purpose, the oil inlet prevention ball seat provided by the utility model adopts the following technical scheme:
the utility model provides an prevent advance oil ball seat, includes tubular seat body, piston, the piston has the sealing position on tubular seat body and is located the conduction position on the sealing position to keep at the sealing position through transposition shear pin be equipped with on one of piston and the tubular seat body and give up the shear pin, be equipped with on the other one with give up the shear pin complex spacing groove, the lower lateral wall of spacing groove with give up the shear pin be not less than the piston from the axial distance of removal of sealing position guide position on tubular seat body to the shearing force of giving up the shear pin is greater than the required pressure of the backwash passageway closure of adaptation packer.
The beneficial effects of the technical scheme are that: the utility model provides an improved oil inlet prevention ball seat, which is characterized in that a limit groove and a release shear pin matched with the limit groove are respectively arranged on one of a piston or a tubular seat body, and the distance between the lower side wall of the limit groove and the release shear pin in the axial direction of the tubular seat body is further limited to be not smaller than the distance of the piston moving from a sealing position to a communicating position, so that when the piston is pressed to move from the sealing position to the communicating position, the release shear pin is ensured not to be influenced by the shearing force of the piston, and the blocking of the release shear pin to the piston is prevented from influencing the movement of the piston; when the piston is pressed to move downwards, the piston is blocked by the cooperation of the limiting groove and the releasing shear pin, so that enough pressure is formed in the pipe column to close the backwashing valve of the packer, and further the backwashing channel of the packer is closed.
Further, the limit groove is a ring groove, and the ring groove and the piston are coaxially arranged.
The beneficial effects of the technical scheme are that: by adopting the ring groove, the through-mounting of the shear pin can be realized without positioning, and the assembly efficiency is improved; the coaxial arrangement is easy to manufacture the ring groove.
Further, the transposition shear pin and the releasing shear pin are positioned on the same side of the piston in the circumferential direction of the piston.
The beneficial effects of the technical scheme are that: by means of the arrangement, the replacement shear pin and the releasing shear pin are convenient to wear, and assembly efficiency is improved.
Further, more than two releasing shear pins are arranged.
The beneficial effects of the technical scheme are that: by the arrangement, larger pressure can be formed in the tubular column, so that the backwashing channels of the packer are closed more efficiently.
Further, an avoidance groove is formed in the inner wall of the tubular base body at a position corresponding to the transposition shear pin and/or the releasing shear pin.
The beneficial effects of the technical scheme are that: by the arrangement, the transposition shear pin and the releasing shear pin are convenient to deform when being subjected to shearing force, and then are easier to shear.
In order to achieve the above purpose, the dispensing pipe column of the utility model adopts the following technical scheme:
the split injection pipe column comprises a pipe column body, wherein the lower end of the pipe column body is connected with an oil inlet prevention ball seat, the oil inlet prevention ball seat comprises a tubular seat body and a piston, the piston is provided with a sealing position and a conducting position located above the sealing position on the tubular seat body, the piston is kept at the sealing position through a transposition shear pin, one of the piston and the tubular seat body is provided with a release shear pin, the other one of the piston and the tubular seat body is provided with a limiting groove matched with the release shear pin, the distance between the lower side wall of the limiting groove and the release shear pin in the axial direction of the tubular seat body is not less than the moving distance of the piston from the sealing position to the conducting position, and the shearing force of the release shear pin is larger than the pressure required by closing a backwashing channel of an adaptive packer.
The beneficial effects of the technical scheme are that: the utility model provides an improved oil inlet prevention ball seat, which is characterized in that a limit groove and a release shear pin matched with the limit groove are respectively arranged on one of a piston or a tubular seat body, and the distance between the lower side wall of the limit groove and the release shear pin in the axial direction of the tubular seat body is further limited to be not smaller than the distance of the piston from a sealing position to a communicating position, so that when the piston is pressed to move from the sealing position to the communicating position, the release shear pin is prevented from being influenced by the shearing force of the piston, and the blocking of the release shear pin on the piston is prevented from influencing the movement of the piston; when the piston is pressed to move downwards, the piston is blocked by the cooperation of the limiting groove and the releasing shear pin, so that enough pressure is formed in the pipe column to close the backwashing valve of the packer, and further the backwashing channel of the packer is closed.
Further, the limit groove is a ring groove, and the ring groove and the piston are coaxially arranged.
The beneficial effects of the technical scheme are that: by adopting the ring groove, the through-mounting of the shear pin can be realized without positioning, and the assembly efficiency is improved; the coaxial arrangement is easy to manufacture the ring groove.
Further, the transposition shear pin and the releasing shear pin are positioned on the same side of the piston in the circumferential direction of the piston.
The beneficial effects of the technical scheme are that: by means of the arrangement, the replacement shear pin and the releasing shear pin are convenient to wear, and assembly efficiency is improved.
Further, more than two releasing shear pins are arranged.
The beneficial effects of the technical scheme are that: by the arrangement, larger pressure can be formed in the tubular column, so that the backwashing channels of the packer are closed more efficiently.
Further, an avoidance groove is formed in the inner wall of the tubular base body at a position corresponding to the transposition shear pin and/or the releasing shear pin.
The beneficial effects of the technical scheme are that: by the arrangement, the transposition shear pin and the releasing shear pin can be deformed when being subjected to shearing force, and then are cut off more easily.
Drawings
Fig. 1 is a schematic structural view of an oil feed prevention tee of the present utility model.
In the figure: 1. a tubular seat body; 11. an internal thread; 12. a tee section; 121. a stopper; 13. a conducting bit; 14. a sealing position; 15. an external thread; 16. a central passage; 2. a seal ring; 3. transposition shear pins; 4. releasing shear pins; 5. a piston; 51. a limit groove; 52. a diversion opening groove; 141. avoiding the groove.
Detailed Description
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the particular embodiments described herein are illustrative only and are not intended to limit the utility model, i.e., the embodiments described are merely some, but not all, of the embodiments of the utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present utility model.
It is noted that relational terms such as "first" and "second", and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, terms such as "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" or the like does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The features and capabilities of the present utility model are described in further detail below in connection with the examples.
Embodiment 1 of the oil feed prevention tee of the present utility model:
as shown in fig. 1, the oil inlet prevention ball seat provided by the utility model is applied to a separate injection pipe column and comprises a tubular seat body 1, wherein the upper end of the tubular seat body 1 is provided with an internal thread 11, the lower end of the tubular seat body 1 is provided with an external thread 15, the upper end of the tubular seat body 1 is connected with the lower end part of the pipe column body of the separate injection pipe column, and the lower end of the tubular seat body 1 is connected with a screen pipe and a plug.
The inner bore of the tubular housing 1 forms a central passage 16 for the passage of liquid, the tubular housing 1 comprising a ball seat section 12, a conducting location 13 and a sealing location 14 connected in sequence from top to bottom. Wherein the ball seat section 12 is arranged below the internal thread 11, the ball seat section 12 is of a necking structure with wide upper part and narrow lower part, and is used for supporting a ball body thrown from the upper end of the dispensing pipe column and sealing the central channel 16 by being matched with the conical surface of the ball body; the sealing position 14 is provided with a piston 5 in a penetrating manner along the axial direction of the tubular seat body 1, the outer peripheral surface of the piston 5 is provided with an annular sealing groove, and the piston 5 is in sealing fit with the sealing position 14 through a sealing ring 2 arranged in the annular sealing groove, so that the central channel 16 is sealed. An avoiding groove 141 is arranged on the inner wall of the tubular seat body 1 at the position corresponding to the transposition shear pin 3 and/or the releasing shear pin 4.
In the embodiment, a transposition shear pin 3 and a releasing shear pin 4 are radially arranged on the piston 5 and the sealing position 14 in a penetrating manner, and the transposition shear pin 3 and the releasing shear pin 4 are positioned on the same side in the circumferential direction of the piston 5; the outer peripheral surface of the piston 5 is provided with a limit groove 51 below the transposition shear pin 3, specifically, the limit groove 51 is an annular groove coaxially arranged with the piston 5 and used for accommodating the releasing shear pin 4, and the annular groove is arranged so as to facilitate quick assembly of the releasing shear pin 4; the position of the piston 5 can be limited through the arrangement of the transposition shear pin 3 so as to ensure that the piston 5 is positioned in the sealing position 14, the transposition shear pin 3 can be sheared after being sheared to enable the piston 5 to be separated from the limit fit between the sealing position 14 and to be uplink, and then the piston 5 can be pushed upwards to enter the conducting position 13 by the pushing force; when the piston 5 moves downwards to return to the sealing position 14 under the action of pressure, the releasing shear pin 4 is matched with the upper end face of the limiting groove 51 to form a stop for the piston 5, so that enough pressure can be held in the pipe column to close a backwashing valve of the matched packer, the pressure continues to be pressed, and the releasing shear pin 4 is sheared after being subjected to shearing force, so that the piston 5 is completely separated from the limiting fit between the piston 5 and the sealing position 14 and moves downwards out of the sealing position 14.
In this embodiment, the lower end surface of the ball seat segment 12 has an inner diameter less than the diameter of the piston 5 such that after the piston 5 is moved up into the pass-through position 13, the piston 5 is prevented from moving up out of the tubular housing 1 by the lower end surface of the ball seat segment 12 having a stop 121 for a stop engagement with the piston 5.
In this embodiment, the inner diameter of the conducting position 13 is larger than the diameter of the piston 5, so that after the piston 5 moves up into the conducting position 13 and the sealing ring 2 enters the inner cavity of the conducting position 13, an annular space is formed between the conducting position 13 and the piston 5 due to the difference of the size structures, meanwhile, a diversion opening groove 52 extending radially to the outer side wall of the piston 5 is formed at the upper end part of the piston 5, so that the channel at the ball seat section 12 can be conducted with the channel at the sealing position 14 after passing through the diversion opening groove 52 and the annular space, and then the overall up-down conduction of the central channel 16 is realized, the inner cavity of the conducting position 13 forms a containing cavity for containing the piston 5, and the annular space forms a sealing failure part which is arranged at intervals with the sealing ring 2 to make the sealing ring 2 fail; the annular space and the flow guiding open groove 52 form a flow guiding channel which enables the central channel 16 to be conducted up and down after the piston 5 is pushed to move up into the conducting position 13, and the flow guiding open groove 52 forms a flow guiding structure communicated with the annular space.
In the embodiment, the shearing pressure set by the transposition shear pin 3 is larger than the pushing pressure of the outer liquid column of the column when the column passes through the oil cap section, so that the shearing of the transposition shear pin 3 caused by overlarge pushing pressure of the outer liquid column can be effectively avoided when the column passes through the oil cap section, and the problem that liquid outside the column enters the column is avoided; the shearing pressure set by the releasing shear pin 4 is larger than the pushing pressure required by closing the matched packer backwashing valve. Because the distance between the lower side wall of the limit groove 51 and the releasing shear pin 4 in the axial direction of the tubular seat body 1 is not smaller than the moving distance of the piston 5 from the sealing position 14 to the conducting position 13, when the piston 5 moves upwards in the conducting position 13, the position of the limit groove 51 arranged on the outer peripheral surface of the piston 5 moves upwards along with the position, the releasing shear pin 4 slides in the limit groove 51, and when the piston 5 moves upwards to the conducting position 13 and stops upwards due to the stop of the ball seat stop part 121, the releasing shear pin 4 is still positioned in the limit groove 51, namely the lower end surface of the limit groove 51 does not touch the releasing shear pin 4, so that the releasing shear pin 4 cannot receive the shearing force; when the oil pipe is pressed into the pipe column, the piston 5 is pushed back into the sealing position 14 under the action of pressure, the piston 5 is matched with the sealing position 14 again to seal the central channel 16, the releasing shear pin 4 is matched with the upper end face of the limiting groove 51 to form a stop for the piston 5, and the shearing pressure set by the releasing shear pin 4 is larger than the pushing pressure required by closing the back flushing valve of the packer, so that the back flushing valve of the packer can be closed by forming enough pressure in the pipe column before the shearing force of the releasing shear pin 4 caused by the piston 5 is sheared, and the back flushing channel of the packer is closed.
In actual use, when the separate injection pipe column passes through the oil cap section, the piston 5 seals the central channel 16 through sealing fit between the transposition shear pin 3 and the sealing position 14, at the moment, the oil cap and the liquid in the well cannot enter the separate injection pipe column, and the backwash valve of the packer continuously moves upwards under the action of internal and external pressure differences, so that the backwash channel of the packer is opened; after the separate injection pipe column passes through the oil cap section, the liquid pressure outside the separate injection pipe column is larger along with the increase of the internal and external pressure difference of the separate injection pipe column, upward pushing force is applied to the piston 5, when the pushing force reaches a certain value, the transposition shear pin 3 is sheared under the shearing force action of the piston 5, the piston 5 is separated from the fixed limit between the sealing position 14, the piston 5 is pushed by the liquid pressure and enters the conducting position 13, the sealing ring 2 moves upwards along with the piston 5 to the conducting position 13, at the moment, the inner diameter of the conducting position 13 is larger than the diameter of the piston 5, so that the sealing ring 2 cannot form sealing, well liquid enters the inside of the separate injection pipe column through the sealing position 14, the annular interval and the diversion opening groove 52, at the moment, the pressure difference between the inside and the outside of the separate injection pipe column is in a relatively stable value, the sufficient internal and external pressure difference cannot be formed to close a backwash valve of the packer, and a backwash channel of the packer is still in an open state; after the separate injection pipe column is lowered to the designed depth, the packer is set, the pressure test is carried out in the pipe column through an oil pipe, the piston 5 moves back into the sealing position 14 under the action of pressure and stops moving downwards under the stop of the upper end surfaces of the releasing shear pin 4 and the limiting groove 51, at the moment, the piston 5 is in sealing fit with the sealing position 14 to seal the central channel 16, and the shearing pressure of the releasing shear pin 4 is larger than the pushing pressure required by closing the backwashing valve of the packer, so that enough pressure can be held in the pipe column, and the backwashing valve of the packer continuously moves downwards under the action of internal and external pressure difference, so that the backwashing channel of the packer is closed; continuing to press, the thrust that piston 5 received increases gradually, when the thrust reaches a definite value, release shear pin 4 receives the shearing force effect of piston 5 to be cut off, piston 5 breaks away from with sealing position 14 downwards, deviate from the export of tubular pedestal 1 to open tubular column central channel 16's bottom completely, can carry out operation processes such as well-flushing, test seal this moment, after well-flushing, test seal accomplish, through throwing into the spheroid from the tubular column upper end, fall on the ball seat section, realize the shutoff to tubular column bottom passageway, carry out the water injection operation after the blending is qualified. In this embodiment, the packer adapted to the separate injection string is a Y221 type packer.
Example 2 of the oil feed prevention tee of the present utility model:
in the embodiment 1 of the oil inlet prevention ball seat, the transposition shear pin is arranged above the upper side wall of the limit groove in a penetrating way. In the embodiment, the transposition shear pin is arranged below the lower side wall of the limiting groove in a penetrating way; in other embodiments, the index shear pin may also be threaded into the restraint slot and adjacent to the lower side wall of the restraint slot.
Example 3 of the oil feed prevention tee of the present utility model:
in embodiment 1 of the oil feed prevention ball seat of the present utility model, the limit groove is a ring groove coaxial with the piston. In the embodiment, the limit grooves are axial slide grooves uniformly distributed along the circumferential direction of the piston; in other embodiments, the limiting groove is a plurality of ring grooves coaxial with the piston, and corresponding releasing shear pins are arranged for each of the sliding grooves according to the shearing force requirement.
Example 4 of the oil feed prevention tee of the present utility model:
in embodiment 1 of the oil feed prevention ball seat of the present utility model, the index shear pin and the release shear pin are located on the same side of the piston in the circumferential direction of the piston. In this embodiment, the index shear pin and the release shear pin are located on both circumferential sides of the piston, respectively.
Example 5 of the oil feed prevention tee of the present utility model:
in example 1 of the oil feed prevention tee of the present utility model, a release shear pin is provided. In the embodiment, more than two releasing shear pins are arranged, so that larger pressure can be formed in the tubular column, and the backwashing channels of the packer are closed more efficiently. In other embodiments, more than three or other suitable number of releasing pins may be provided.
Example 6 of the oil feed prevention tee of the present utility model:
in the embodiment 1 of the oil feed prevention ball seat, the limit groove is arranged on the piston. In this embodiment, the limiting groove is disposed on the tubular seat body.
Example 7 of the oil feed prevention tee of the present utility model:
in the embodiment 1 of the oil inlet prevention ball seat, an avoidance groove is formed in the inner wall of the tubular seat body at the position corresponding to the transposition shear pin and/or the releasing shear pin. In this embodiment, the inner wall of the tubular seat body is not provided with a avoiding groove at the position corresponding to the position of the transposition shear pin and/or the releasing shear pin.
Embodiments of the dispensing column of the present utility model:
in the embodiment of the separate injection pipe column, the separate injection pipe column comprises a pipe column body, wherein the lower end of the pipe column body is connected with an oil inlet prevention ball seat, and the oil inlet prevention ball seat is consistent with the oil inlet prevention ball seat in the embodiment 1-7, and is not repeated herein.
The above description is only a preferred embodiment of the present utility model, and the patent protection scope of the present utility model is defined by the claims, and all equivalent structural changes made by the specification and the drawings of the present utility model should be included in the protection scope of the present utility model.
Claims (10)
1. The utility model provides an prevent advance oil ball seat, includes tubular seat body, piston, the piston has sealing position and the conduction position that is located the sealing position on tubular seat body to keep in sealing position through transposition shear pin, its characterized in that: the device is characterized in that a releasing shear pin is arranged on one of the piston and the tubular seat body, a limiting groove matched with the releasing shear pin is formed in the other one of the piston and the tubular seat body, the distance between the lower side wall of the limiting groove and the releasing shear pin in the axial direction of the tubular seat body is not smaller than the moving distance of the piston in the self-sealing position to the communicating position, and the shearing force of the releasing shear pin is larger than the pressure required by closing a backwashing channel of the adaptive packer.
2. The anti-tee of claim 1, wherein: the limiting groove is a ring groove, and the ring groove and the piston are coaxially arranged.
3. The anti-tee according to claim 1 or 2, wherein: the transposition shear pin and the releasing shear pin are positioned on the same side of the piston in the circumferential direction of the piston.
4. The anti-tee according to claim 1 or 2, wherein: more than two releasing shear pins are arranged.
5. The anti-tee of claim 4, wherein: and an avoidance groove is formed in the inner wall of the tubular seat body at a position corresponding to the transposition shear pin and/or the release shear pin.
6. The branch annotates the tubular column, including the tubular column body, the lower extreme of tubular column body is connected with prevents into oil ball seat, prevent into oil ball seat and include tubular pedestal, piston, the piston has sealed position and the conduction position that is located sealed position on tubular pedestal to keep at sealed position, its characterized in that through transposition shear pin: the device is characterized in that a releasing shear pin is arranged on one of the piston and the tubular seat body, a limiting groove matched with the releasing shear pin is formed in the other one of the piston and the tubular seat body, the distance between the lower side wall of the limiting groove and the releasing shear pin in the axial direction of the tubular seat body is not smaller than the moving distance of the piston in the self-sealing position to the communicating position, and the shearing force of the releasing shear pin is larger than the pressure required by closing a backwashing channel of the adaptive packer.
7. The dispensing string of claim 6, wherein: the limiting groove is a ring groove, and the ring groove and the piston are coaxially arranged.
8. The dispensing column of claim 6 or 7, wherein: the transposition shear pin and the releasing shear pin are positioned on the same side of the piston in the circumferential direction of the piston.
9. The dispensing column of claim 6 or 7, wherein: more than two releasing shear pins are arranged.
10. The dispensing string of claim 9, wherein: and an avoidance groove is formed in the inner wall of the tubular seat body at a position corresponding to the transposition shear pin and/or the release shear pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320107831.3U CN219570064U (en) | 2023-02-03 | 2023-02-03 | Oil inlet prevention ball seat and separate injection pipe column |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320107831.3U CN219570064U (en) | 2023-02-03 | 2023-02-03 | Oil inlet prevention ball seat and separate injection pipe column |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219570064U true CN219570064U (en) | 2023-08-22 |
Family
ID=87652505
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320107831.3U Active CN219570064U (en) | 2023-02-03 | 2023-02-03 | Oil inlet prevention ball seat and separate injection pipe column |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219570064U (en) |
-
2023
- 2023-02-03 CN CN202320107831.3U patent/CN219570064U/en active Active
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