CN212054600U - Tail pipe blocking device - Google Patents
Tail pipe blocking device Download PDFInfo
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- CN212054600U CN212054600U CN202020215660.2U CN202020215660U CN212054600U CN 212054600 U CN212054600 U CN 212054600U CN 202020215660 U CN202020215660 U CN 202020215660U CN 212054600 U CN212054600 U CN 212054600U
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Abstract
The utility model discloses a tail pipe blocking device belongs to well completion technical field. The tail pipe plugging device comprises: an upper joint; the shell is detachably connected with the upper joint; the soluble blocking sliding sleeve is fixed in the shell through a constant pressure shear pin; the boosting spring is sleeved outside the plugging sliding sleeve, and one end of the boosting spring is in contact with the upper connector; and the sealing ring is arranged between the outer wall of the plugging sliding sleeve and the inner wall of the shell. Because the plugging sliding sleeve is soluble, the plugging sliding sleeve can be dissolved automatically after falling into a shaft for a certain time, solid residues cannot be generated in the shaft, and the problem of plugging of a well completion pipe column is effectively solved. Through establishing a helping hand spring at shutoff sliding sleeve outer wall cover, the one end of helping hand spring offsets with the spacing step on the shutoff sliding sleeve outer wall, and when the level pressure shear pin was cut off by the suppress, the helping hand spring was by compression state diastole to the state of extending, can promote supplementary shutoff sliding sleeve and pop out the casing, got into pit shaft depths smoothly.
Description
Technical Field
The utility model relates to a well completion technical field, in particular to tail pipe blocking device.
Background
The operation under pressure is used as an underground operation technology, is beneficial to reducing the pollution to the stratum, stably produces oil and is widely applied to the development of oil and gas fields. When the well is completed under the pressure operation, a tail pipe plugging device is needed to temporarily plug the bottom of a well completion pipe column which is put into the well, after the well completion pipe column is put to a preset depth, an oil pipe channel is opened in a pressure-building or touch mode, and the oil well can be normally produced. It is seen that there is a need for a tailpipe plugging device.
The prior art provides a tailpipe plugging device including: the body, be fixed in the inside jam body of body through the level pressure pin, set up the sealing washer between body and jam body, during the operation, the upper portion of body is connected with the well completion tubular column of going into, and the lower part is connected with screen pipe or guide cone, and after the well is gone into, suppress the pressure in the tubular column and make the level pressure pin cut off, and the jam body falls into pit shaft or screen pipe, makes well completion tubular column and well intercommunication.
The inventor finds that the prior art has at least the following technical problems:
because the plugging body falls into the screen or wellbore, when the completion string is run into the horizontal section, the plugging body tends to return with the well fluid to the completion string, resulting in plugging of the completion string.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a tail pipe blocking device can solve above-mentioned technical problem.
Specifically, the method comprises the following technical scheme:
a tailpipe plugging device, comprising: an upper joint;
the shell is detachably connected with the upper joint;
the soluble blocking sliding sleeve is fixed in the shell through a constant pressure shear pin;
the boosting spring is sleeved outside the plugging sliding sleeve in a compressed state, and one end of the boosting spring is abutted to a limiting step on the outer wall of the plugging sliding sleeve;
and the sealing ring is arranged between the outer wall of the plugging sliding sleeve and the inner wall of the shell.
In one possible implementation, the blocking sleeve includes: the small-diameter sealing end is connected with the first end of the small-diameter body;
the limiting step is formed between the large-diameter sealing end and the small-diameter body;
the power-assisted spring is sleeved on the small-diameter body in a compressed state, and one end of the power-assisted spring is abutted to the limiting step;
the large-diameter sealing end is fixed inside the shell through the constant-pressure shear pin;
the sealing ring is arranged between the outer wall of the large-diameter sealing end and the inner wall of the shell.
In a possible implementation manner, a sealing groove is arranged on the inner wall of the shell and used for accommodating the sealing ring.
In one possible implementation, the upper joint includes: the first connecting section, the limiting section and the second connecting section are connected in sequence;
the inner diameter of the limiting section is smaller than that of the first connecting section and that of the second connecting section;
the other end of the power-assisted spring is in contact with the end face of the limiting section.
In one possible implementation, the first end of the housing is threadedly connected to the first connection section.
In a possible implementation manner, the outer wall of the first end of the housing is provided with a first external thread, and the inner wall of the first connecting section is provided with a first internal thread matched with the first external thread.
In a possible implementation manner, a second internal thread is arranged on the inner wall of the second connecting section and is used for being in threaded connection with the well-descending pipe column.
In one possible implementation, the second end of the housing has a second external thread provided on an outer wall thereof for threaded connection with a tubular string.
In one possible implementation, the second end of the minor-diameter body is located within the second connecting section.
In a possible implementation manner, an arc-shaped groove is formed in the end face of the second end of the small-diameter body and used for supporting the spherical bottom valve;
the second connecting section is provided with a spherical cavity matched with the spherical bottom valve.
The embodiment of the utility model provides a technical scheme's beneficial effect includes at least:
the embodiment of the utility model provides a tail pipe blocks up device can carry out temporary shutoff to the completion tubular column bottom of going into the well, during the application, makes this tail pipe block up device's top connection and casing be connected with the completion tubular column bottom of going into, sets for position department in going into the well, can carry out the area and press the well completion under the operation. After the well completion operation is finished, the pressure is applied to the inside of the well completion pipe string according to the shearing pressure of the constant pressure shear pin so as to shear the constant pressure shear pin, the plugging sliding sleeve falls into the shaft from the shell, and the well completion pipe string is communicated with the casing pipe so as to facilitate subsequent oil and gas production.
Because the plugging sliding sleeve is soluble, the plugging sliding sleeve can be dissolved automatically after falling into a shaft for a certain time, solid residues cannot be generated in the shaft, and the problem of plugging of a well completion pipe column is effectively solved. Through establishing a helping hand spring at shutoff sliding sleeve outer wall cover to make helping hand spring's one end offset with the spacing step on the shutoff sliding sleeve outer wall, when the level pressure shear pin is not cut, helping hand spring is in compression state, when the level pressure shear pin is cut by the suppress, helping hand spring is by compression state diastole to the state of extending, can promote supplementary shutoff sliding sleeve and pop out the casing, get into pit shaft depths smoothly.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a tail pipe plugging device according to an embodiment of the present invention.
The reference numerals denote:
1-an upper joint, wherein the joint is a hollow joint,
101-a first connecting section, 102-a limiting section, 103-a second connecting section,
2-shell, 3-constant pressure shear pin,
4-a plugging sliding sleeve, 401-a small-diameter body, 402-a large-diameter sealing end, 403-an arc groove,
5-power-assisted spring, 6-sealing ring.
Detailed Description
In order to make the technical solutions and advantages of the present invention clearer, the following will describe the embodiments of the present invention in further detail with reference to the accompanying drawings.
The embodiment of the utility model provides a tail pipe blocks up device, as shown in figure 1, this tail pipe blocks up device includes: an upper joint 1;
a housing 2 detachably connected to the upper joint 1;
the soluble plugging sliding sleeve 4 is fixed in the shell 2 through a constant pressure shear pin 3;
the boosting spring 5 is sleeved outside the plugging sliding sleeve 4 in a compressed state, and one end of the boosting spring is abutted against a limiting step on the outer wall of the plugging sliding sleeve 4;
and the sealing ring 6 is arranged between the outer wall of the plugging sliding sleeve 4 and the inner wall of the shell 2.
The embodiment of the utility model provides a tail pipe blocks up device can carry out temporary shutoff to the completion tubular column bottom of going into the well, during the application, makes this tail pipe block up device's top connection 1 and casing 2 be connected with the completion tubular column bottom of going into, sets for position department in going into the well, can take the area to press the well completion under the operation. After the well completion operation is finished, the pressure is applied to the inside of the well completion pipe string according to the shearing pressure of the constant pressure shear pin 3 so as to shear the constant pressure shear pin 3, the plugging sliding sleeve 4 falls into the shaft from the shell 2, and the well completion pipe string is communicated with the casing pipe so as to facilitate subsequent oil and gas production.
Because the plugging sliding sleeve 4 is soluble, the plugging sliding sleeve can be dissolved automatically after falling into a shaft for a certain time, solid residues cannot be generated in the shaft, and the problem of plugging of a well completion pipe column is effectively solved. Through establishing a helping hand spring 5 at 4 outer wall covers of shutoff sliding sleeve to make the one end of helping hand spring 5 offset with last spacing step on 4 outer walls of shutoff sliding sleeve, set up like this, when the level pressure shear pin is not cut, helping hand spring is in compression state, when the level pressure shear pin is cut by the suppress, helping hand spring is by compression state diastole to the state of stretching, can promote supplementary shutoff sliding sleeve and pop out the casing, get into pit shaft depths smoothly.
The embodiment of the utility model provides an in, shutoff sliding sleeve 4 is used for realizing the tail pipe and blocks up as the shutoff inner core, and it adopts soluble material preparation to obtain, for example, this soluble material can be for the soluble composite metal material etc. of oil company research and development such as beckhaus, schlumberger, PEAK, and after the shutoff sliding sleeve 4 falls into the inherent chloridion that contacts fluid in it contained a period of time, can take place chemical reaction with it like this, in time dissolve.
In the embodiment of the present invention, as shown in fig. 1, the plugging sliding sleeve 4 includes: the small-diameter sealing structure comprises a small-diameter body 401 and a large-diameter sealing end 402 connected with a first end of the small-diameter body 401, wherein the limiting step is formed between the large-diameter sealing end 402 and the small-diameter body 401. Wherein, the power spring 5 is sleeved on the small-diameter body 401 in a compressed state, and one end of the power spring is abutted against the limit step; the large-diameter sealing end 402 is fixed inside the shell 2 through a constant-pressure shear pin 3; the seal ring 6 is provided between the outer wall of the large diameter seal end 402 and the inner wall of the housing 2.
It can be understood that the outer diameter of the small-diameter body 401 is smaller than that of the large-diameter sealing end 402, and a limit step is formed at the joint of the two. The limiting step can be used for limiting one end of the power-assisted spring 5 sleeved on the small-diameter body 401.
By arranging the plugging sliding sleeve 4 to comprise: the small-diameter body 401 and the large-diameter sealing end 402 can enable the booster spring 5 to be easily sleeved on the small-diameter body 401 and enable the booster spring 5 to be compressed when the constant-pressure shear pin 3 is not sheared, and can enable the large-diameter sealing end 402 to be used for plugging the inside of the shell 2.
Specifically, the large-diameter seal end 402 is fixed inside the housing 2 by the constant pressure shear pin 3, and the seal ring 6 is disposed between the outer wall of the large-diameter seal end 402 and the inner wall of the housing 2 to seal the gap between the large-diameter seal end 402 and the housing 2, thereby achieving sealing.
In a possible example, the sealing ring 6 is located upstream of the constant pressure shear pin 3 to ensure that the blocking sleeve 4 can slide smoothly out of the housing 2 after the constant pressure shear pin 3 is sheared.
It will be appreciated that the pressure at which the tubing is pressed is determined based on the specific shear force that the constant pressure shear pin 3 has to shear the constant pressure shear pin 3 smoothly. The embodiment of the utility model provides an in, can follow the circumferencial direction, evenly set up two or three level pressure shear pins 3.
In order to keep the sealing ring 6 stably in the gap between the housing 2 and the large diameter sealing end 402, and at the same time, when the large diameter sealing end 402 moves downwards from the housing 2, the sealing ring 6 may not move downwards along with the plugging sliding sleeve 4 and fall into the wellbore, in a possible example, a sealing groove may be provided on the inner wall of the housing 2, and the sealing ring 6 is accommodated by the sealing groove.
In another possible example, a sealing groove may also be provided on the outer wall of the large-diameter sealing end 402, with which sealing ring 6 is accommodated.
In yet another possible example, two opposite sealing grooves may be provided on the outer wall of the large-diameter sealing end 402 and the inner wall of the housing 2, respectively, and the two sealing grooves are used to accommodate the sealing ring 6.
The embodiment of the utility model provides an in, sealing washer 6 can set up to a plurality ofly, for example two, three etc. to improve sealed effect.
In connecting the tail pipe plugging device with the completion string (specifically, the tubing in the completion string), the tubing of the completion string is connected using the ends of the upper joint 1 and the housing 2, respectively.
As an example, for the upper joint 1, the upper joint 1 may include: the device comprises a first connecting section 101, a limiting section 102 and a second connecting section 103 which are connected in sequence, wherein the inner diameter of the limiting section 102 is smaller than that of the first connecting section 101 and that of the second connecting section 103; the other end of the booster spring 5 is in contact with the end face of the limiting section 102.
The first connection section 101 of the upper joint 1 may be connected with the housing 2 and the second connection section 103 of the upper joint 1 may be connected with the tubing of the completion string. Wherein, the inner diameter of the limiting section 102 is smaller than the inner diameter of the first connecting section 101 and the inner diameter of the second connecting section 103, that is, the limiting section 102 can be understood as a limiting step arranged inside the upper joint 1, and one end of the power spring 5 is in contact with the end surface of the limiting section 102 to limit the power spring 5.
It can be understood that the inner diameter of the limiting section 102 is smaller than the diameter of the power spring 5, so that the end surface of the power spring 5 is in contact with the end surface of the limiting section 102, and thus, the power spring 5 is compressed by the limiting step and the upper joint 1, so that the purpose that the power spring 5 is in a compressed state when the constant pressure shear pin 3 is not sheared, and the soluble blocking sliding sleeve 4 is assisted to pop out the tail pipe blocking device when the constant pressure shear pin 3 is sheared by pressure is achieved.
For convenience of installation and maintenance, the first end of the housing 2 may be detachably connected to the first connection section 101 of the upper joint 1, for example, the first end of the housing 2 may be screwed to the first connection section 101.
Specifically, the outer wall of the first end of the housing 2 may be provided with a first external thread, and the inner wall of the first connecting section 101 of the upper joint 1 may be provided with a first internal thread adapted to the first external thread.
By providing the first external thread on the outer wall of the first end of the housing 2, not only the threaded connection with the first connection section 101 of the upper joint 1 can be realized, but also the upper joint 1 can be detached when the tail pipe plugging device is connected to the lower part of the oil well pump, and the first external thread of the first end of the housing 2 is directly used to connect with the bottom valve of the oil well pump.
In order to make the second end of the small diameter body 401 smoothly contact the spherical foot valve, in the embodiment of the present invention, the second end of the small diameter body 401 is located in the second connecting section 103.
Based on the above, can utilize this tail pipe blocking device to replace the bottom plug of oil well pump, make simultaneously be provided with arc recess 403 on the terminal surface of the second end of path body 401 for the ball shape bottom valve of bearing oil well pump, make the ball shape cavity separation with ball shape bottom valve looks adaptation that ball bottom valve and second linkage segment 103 have, make pressure can transmit the lower part, cut the pin when needs, shutoff sliding sleeve 4 falls into the well, oil well pump ball shape bottom valve falls into the ball shape cavity of the second linkage segment 103 of device top connection 1, form new bottom valve, cooperation oil well pump production. Therefore, the device can be respectively suitable for pump operation in a water well and an oil well, and has universality.
It can be understood that the arc-shaped groove 403 arranged on the end surface of the second end of the small-diameter body 401 of the plugging sliding sleeve 4 is matched with the structure of the spherical bottom valve so as to just accommodate the bottom of the spherical bottom valve.
For the upper joint 1, a second internal thread is provided on the inner wall of the second connection section 103 thereof for threaded connection with the tubular string. Specifically, the second connection section 103 is threaded with tubing on the running string.
Based on the second inner thread provided on the second connection section 103 connected to one end of the running string, correspondingly, a second outer thread should be provided on the outer wall of the second end of the housing 2 connected to the other end of the running string for threaded connection with the running string.
To sum up, as shown in fig. 1, the embodiment of the present invention provides a tail pipe plugging device with an optimized structure, which includes: an upper joint 1; a housing 2 detachably connected to the upper joint 1; a soluble plugging sliding sleeve 4 fixed in the shell 2 through a constant pressure shear pin 3; the boosting spring 5 is sleeved outside the plugging sliding sleeve 4, and one end of the boosting spring is in contact with the upper connector 1; and the sealing ring 6 is arranged between the outer wall of the plugging sliding sleeve 4 and the inner wall of the shell 2.
Wherein, the material of shutoff sliding sleeve 4 is selected from soluble composite metal material etc. that oil company such as beckhaus, schlumberger, PEAK researched and developed, and it includes: a small-diameter body 401, and a large-diameter seal end 402 connected to a first end of the small-diameter body 401.
Wherein, the second end of path body 401 is provided with arc recess 403 for supporting ball shape bottom valve.
The large-diameter sealing end 402 is fixed inside the shell 2 through a constant-pressure shear pin 3; at least one ring of sealing rings 6 is disposed between the outer wall of the large diameter sealing end 402 and the inner wall of the housing 2.
The upper joint 1 includes: the connecting structure comprises a first connecting section 101, a limiting section 102 and a second connecting section 103 which are connected in sequence, wherein the inner diameter of the limiting section 102 is smaller than that of the first connecting section 101 and that of the second connecting section 103.
The booster spring 5 is sleeved on the small-diameter body 401, one end of the booster spring is in contact with the end face of the limiting section 102, and the other end of the booster spring is in contact with the end face of the large-diameter sealing end 402.
Specifically, the outer wall of the first end of the housing 2 is provided with a first external thread, the inner wall of the first connecting section 101 of the upper joint 1 is provided with a first internal thread matched with the first external thread, the inner wall of the second connecting section 103 of the upper joint 1 is provided with a second internal thread for being connected with the lower tubular column thread, and meanwhile, the outer wall of the second end of the housing 2 is provided with a second external thread for being connected with the lower tubular column thread.
Utilize the embodiment of the utility model provides a tail pipe blocking device can carry out temporary shutoff to the completion tubular column bottom of going into the well, during the application, makes this tail pipe blocking device's top connection 1 and casing 2 be connected with the completion tubular column bottom of going into, sets for position department in going into the well, can take the area to press the well completion under the operation. After the well completion operation is finished, the pressure is applied to the inside of the well completion pipe string according to the shearing pressure of the constant pressure shear pin 3 so as to shear the constant pressure shear pin 3, the plugging sliding sleeve 4 falls into the shaft from the shell 2, and the well completion pipe string is communicated with the casing pipe so as to facilitate subsequent oil and gas production.
Because the plugging sliding sleeve 4 is soluble, the plugging sliding sleeve can be dissolved automatically after falling into a shaft for a certain time, solid residues cannot be generated in the shaft, and the problem of plugging of a well completion pipe column is effectively solved. The assisting spring 5 is sleeved on the outer wall of the plugging sliding sleeve 4, and one end of the assisting spring 5 is in contact with the upper connector 1, so that the aims that the assisting spring 5 is in a compressed state when the constant pressure shear pin 3 is not sheared, and the soluble plugging sliding sleeve 4 is assisted to pop out the tail pipe plugging device when the constant pressure shear pin 3 is sheared.
The embodiment of the utility model provides a tail pipe blocking device can use as ordinary tail when the well operation, connects through top connection 103 and goes into in the well in the tubular column of going into the well after the lower extreme, directly suppresses when needs and cuts level pressure shear pin 3, beats soluble shutoff sliding sleeve 4 that falls, makes tubular column and pit shaft intercommunication.
When the oil well is operated, the tail pipe plugging device is used for replacing an oil well pump bottom plug, meanwhile, the second end of the small-diameter body 401 is provided with an arc-shaped groove 403 for supporting a spherical bottom valve of the oil well pump, the spherical bottom valve and the tail pipe plugging device are separated from a concave cavity in the upper connector 1, such as a spherical concave surface, pressure can be transmitted to the lower part, and a pin is cut off when needed. The plugging sliding sleeve 4 falls into the well, and the spherical bottom valve of the oil well pump falls into the spherical concave cavity of the second connecting section 103 of the upper connector 1 of the device to form a new bottom valve which is matched with the production of the oil well pump. Therefore, the device can be respectively suitable for pump operation in a water well and an oil well, and has universality.
The above description is only for facilitating the understanding of the technical solutions of the present invention by those skilled in the art, and is not intended to limit the present invention. 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 (10)
1. A tailpipe plugging device, comprising: an upper joint;
the shell is detachably connected with the upper joint;
a soluble plugging sliding sleeve fixed in the shell through a constant pressure shear pin;
the boosting spring is sleeved outside the plugging sliding sleeve in a compressed state, and one end of the boosting spring is abutted to a limiting step on the outer wall of the plugging sliding sleeve;
and the sealing ring is arranged between the outer wall of the plugging sliding sleeve and the inner wall of the shell.
2. The tailpipe plugging device according to claim 1, wherein the plugging sliding sleeve comprises: the small-diameter sealing end is connected with the first end of the small-diameter body;
the limiting step is formed between the large-diameter sealing end and the small-diameter body;
the power-assisted spring is sleeved on the small-diameter body in a compressed state, and one end of the power-assisted spring is abutted to the limiting step;
the large-diameter sealing end is fixed inside the shell through the constant-pressure shear pin;
the sealing ring is arranged between the outer wall of the large-diameter sealing end and the inner wall of the shell.
3. The tailpipe plugging device according to claim 2, wherein the inner wall of the casing is provided with a seal groove for receiving the seal ring.
4. The tailpipe plugging device according to claim 2, wherein the upper joint comprises: the first connecting section, the limiting section and the second connecting section are connected in sequence;
the inner diameter of the limiting section is smaller than that of the first connecting section and that of the second connecting section;
the other end of the power-assisted spring is abutted and contacted with the end face of the limiting section.
5. The tailpipe plugging device according to claim 4, wherein the first end of the housing is threadedly coupled to the first connection section.
6. The tailpipe plugging device according to claim 5, wherein the outer wall of the first end of the housing is provided with a first external thread, and the inner wall of the first connection section is provided with a first internal thread adapted to the first external thread.
7. The tailpipe plugging device according to claim 6, wherein the inner wall of the second connection section is provided with a second internal thread for screwing with a tubular string.
8. The tailpipe plugging device according to claim 7, wherein the second end of the housing has a second external thread provided on an outer wall thereof for threaded connection with a tubular string.
9. The tailpipe plugging device according to claim 4, wherein the second end of the small diameter body is located in the second connection section.
10. The tailpipe plugging device according to claim 9, wherein an end face of the second end of the small diameter body is provided with an arc-shaped groove for supporting the spherical bottom valve;
the second connecting section is provided with a spherical cavity matched with the spherical bottom valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020215660.2U CN212054600U (en) | 2020-02-26 | 2020-02-26 | Tail pipe blocking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020215660.2U CN212054600U (en) | 2020-02-26 | 2020-02-26 | Tail pipe blocking device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212054600U true CN212054600U (en) | 2020-12-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020215660.2U Active CN212054600U (en) | 2020-02-26 | 2020-02-26 | Tail pipe blocking device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212054600U (en) |
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2020
- 2020-02-26 CN CN202020215660.2U patent/CN212054600U/en active Active
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