CN216240514U - Positioning device in underground pipe - Google Patents
Positioning device in underground pipe Download PDFInfo
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- CN216240514U CN216240514U CN202122994542.3U CN202122994542U CN216240514U CN 216240514 U CN216240514 U CN 216240514U CN 202122994542 U CN202122994542 U CN 202122994542U CN 216240514 U CN216240514 U CN 216240514U
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- pipe
- shear pin
- hydraulic cylinder
- positioning device
- downhole
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Abstract
The application discloses a downhole in-pipe positioning device which comprises a central pipe, wherein a hydraulic cylinder sleeve is sleeved on the periphery of the middle part of the central pipe, and the lower end of the hydraulic cylinder sleeve is fixed with the central pipe through a hydraulic cylinder shear pin; the hydraulic cylinder is characterized by further comprising an expansion clamping ring, a mounting gap is arranged between the upper end of the hydraulic cylinder sleeve and the outer wall of the central pipe in a clamped mode, and the expansion clamping ring is arranged in the mounting gap in a pre-compression mode; after the hydraulic cylinder shear pin is sheared off, the hydraulic cylinder sleeve can slide downwards relative to the central pipe, so that the expansion snap ring in the mounting gap is released. The setting of inflation snap ring precompression can avoid the inflation snap ring to scrape the sleeve pipe inner wall in the in-process of going into in the installation clearance on the one hand, and on the other hand has also made things convenient for devices such as this positioner and packer to go into the intraductal survey position of sleeve, improves workover efficiency.
Description
Technical Field
The utility model belongs to the technical field of oil and gas equipment, and particularly relates to a positioning device in a downhole pipe.
Background
During the well repairing process, the casing needs to be replaced or the casing with the measured depth needs to be repaired when tens of meters of inner casing damage, corrosion and other reasons on the surface are met. The positioning device needs to have sufficient axial load resistance, high torque resistance and high pressure sealing capability. The major at home and abroad adopts a slip type anchoring tool to add a packer or a sleeve for short distance tie-back positioning from bottom to top in the well due to technical limitation, but slips and the like have hard damage to the sleeve when being put in, the long distance sleeve tie-back can not bear larger load and torque, so that the orientation is inaccurate, the position and the direction of a lower well-descending tool are not easy to align, the construction is complicated, and the construction period is long.
It will thus be seen that the prior art is susceptible to further improvements and enhancements.
SUMMERY OF THE UTILITY MODEL
The utility model provides a downhole in-pipe positioning device to solve at least one of the technical problems.
The technical scheme adopted by the utility model is as follows:
the utility model provides a downhole in-pipe positioning device which comprises a central pipe, wherein a hydraulic cylinder sleeve is sleeved on the periphery of the middle part of the central pipe, and the lower end of the hydraulic cylinder sleeve is fixed with the central pipe through a hydraulic cylinder shear pin; the hydraulic cylinder is characterized by further comprising an expansion clamping ring, a mounting gap is arranged between the upper end of the hydraulic cylinder sleeve and the outer wall of the central pipe in a clamped mode, and the expansion clamping ring is arranged in the mounting gap in a pre-compression mode; after the hydraulic cylinder shear pin is sheared off, the hydraulic cylinder sleeve can slide downwards relative to the central pipe, so that the expansion snap ring in the installation gap is released.
The ball seat is arranged inside the central pipe and is fixed with the central pipe through ball seat shear pins; the outer side wall of the ball seat is provided with a first fixing hole, the central pipe is provided with a first shear pin hole corresponding to the first fixing hole, and the first shear pin hole penetrates through the side wall of the central pipe; the ball seat shear pin penetrates through the first shear pin hole and extends into the fixing hole.
As a preferred embodiment of the present invention, the central tube further has a second shear pin hole, the lower end of the hydraulic cylinder sleeve is provided with a second fixing hole, and the hydraulic cylinder shear pin passes through the second fixing hole and extends into the second shear pin hole; the first shear pin hole is arranged above the second shear pin hole.
In a preferred embodiment of the present invention, the middle outer wall of the central tube is further provided with a limit ring, and the expansion snap ring is arranged on the upper portion of the limit ring.
As a preferred embodiment of the present invention, the expansion snap ring further comprises a centering ring, the centering ring is coaxially sleeved outside the central tube, and the centering ring is disposed above the expansion snap ring.
As a preferred embodiment of the present invention, the present invention further comprises an outer sheath, the outer sheath is disposed at the lower end of the central tube; the outer sheath comprises an outer protection part and a connecting part, the lower part of the central tube is provided with a mounting part, and the connecting part is connected with the mounting part; the outer guard portion with press from both sides between the center tube and be equipped with the mounting groove, the lower extreme setting of cylinder liner is in the mounting groove.
As a preferred embodiment of the present invention, a stroke gap is provided between the lower end surface of the cylinder liner and the upper end surface of the connecting portion; the length of the stroke gap is not less than the width of the expansion snap ring.
As a preferred embodiment of the present invention, the sheath further includes a guide head, the guide head is disposed below the outer sheath, and the guide head is connected to the mounting portion.
In a preferred embodiment of the present invention, the connecting portion and the guide head each have an internal thread, and the mounting portion is provided with an external thread; the connecting part and the guide head are connected with the mounting part through thread fit.
In a preferred embodiment of the present invention, a sealing member is disposed between the cylinder sleeve and an outer wall of the central tube, and a sealing member is disposed between the ball seat and an inner wall of the central tube.
Due to the adoption of the technical scheme, the utility model has the beneficial effects that:
1. as a preferred embodiment of the application, the pre-compression arrangement of the expansion snap ring in the installation gap can prevent the expansion snap ring from scratching the inner wall of the casing pipe in the running process, and is convenient for measuring the running position of the positioning device, the packer and other devices in the casing pipe, so that the well repairing efficiency is improved.
2. As a preferred embodiment of the application, due to the existence of the ball seat, the inside of the casing pipe is always communicated before the ball is thrown, so that the large-flow circulating well washing can be carried out in the process of descending the positioning device and other well repairing tools, the working efficiency of the whole well cementation and repairing operation is greatly improved, and the time cost is saved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and not to limit the utility model. In the drawings:
FIG. 1 is a schematic diagram of a downhole in-pipe positioning device.
Wherein the content of the first and second substances,
1, a central tube, 11 first shear pin holes, 12 second shear pin holes, 13 limiting rings and 14 mounting parts;
2, a righting ring;
3 expanding the snap ring;
4 hydraulic cylinder sleeve, 41 hydraulic cylinder shear pin and 42 second fixing hole;
5, installing a gap;
6 ball seats, 61 ball seat shear pins and 62 first fixing holes;
7 outer sheath, 71 mounting groove, 73 outer sheath part and 74 connecting part;
8, guiding the head;
9 sealing element.
Detailed Description
In order to more clearly explain the overall concept of the present application, the following detailed description is given by way of example in conjunction with the accompanying drawings.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
In addition, in the description of the present invention, it is to be understood that the terms "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus are not to be construed as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
As shown in fig. 1, the utility model provides a downhole in-pipe positioning device, which comprises a central pipe 1, wherein a hydraulic cylinder sleeve 4 is sleeved on the periphery of the middle part of the central pipe 1, and the lower end of the hydraulic cylinder sleeve 4 is fixed with the central pipe 1 through a hydraulic cylinder shear pin 41; the expansion clamping ring is characterized by further comprising an expansion clamping ring 3, a mounting gap 5 is arranged between the upper end of the hydraulic cylinder sleeve 4 and the outer wall of the central tube 1 in a clamped mode, and the expansion clamping ring 3 is arranged in the mounting gap 5 in a pre-compressed mode; after the hydraulic cylinder shear pin 41 is sheared, the hydraulic cylinder sleeve 4 can slide downwards relative to the central pipe 1, so that the expansion snap ring 3 in the installation gap 5 is released.
By adopting the structure, on one hand, the inner wall of the sleeve can be prevented from being scratched and damaged in the process of putting the expansion snap ring 3 into the measured position in the sleeve, and meanwhile, the positioning device and the connected well repairing devices such as packers and the like can be conveniently put into the sleeve. And compare in prior art need just/reverse, carry the pipe and transfer mode such as again and release expansion capsule or expansion snap ring 3 and carry out the mode of fixing a position, adopt the positioner operation in this application more simple and convenient, fix a position more rapidly, be favorable to promoting production efficiency.
Further, referring to fig. 1, the pipe joint further comprises a ball seat 6, wherein the ball seat 6 is arranged inside the central pipe 1, and the ball seat 6 is fixed with the central pipe 1 through a ball seat shear pin 61; the outer side wall of the ball seat 6 is provided with a first fixing hole 62, the central tube 1 is provided with a first shear pin hole 11 corresponding to the first fixing hole 62, and the first shear pin hole 11 penetrates through the side wall of the central tube 1; the ball seat shear pin 61 passes through the first shear pin hole 11 and extends into the fixing hole to be fixed relative to the center pipe 1.
Further, as shown in fig. 1, the central tube 1 further has a second shear pin hole 12, the lower end of the hydraulic cylinder sleeve 4 is provided with a second fixing hole 42, and the hydraulic cylinder shear pin 41 extends into the second shear pin hole 12 through the second fixing hole 42; the first nail trimming hole 11 is provided above the second nail trimming hole 12.
In the practical application process, when the positioning device in the underground pipe is lowered to the measuring position, a ball is thrown into the pipe firstly, the ball is seated on the ball seat 6, the upper part of the ball seat is pressurized, so that the ball seat shear pin 61 is cut off, the ball seat 6 slides downwards, and the first fixing hole 62 is released; the pressure in the sleeve can be transmitted to the closed space between the central pipe 1 and the hydraulic cylinder sleeve 4 through the first fixing hole 62, so that the hydraulic cylinder shear pin 41 bears pressure and is cut off, the cylinder sleeve can slide downwards relative to the central pipe 1, the expansion snap ring 3 in the mounting gap 5 is released, and finally the expansion snap ring 3 is clamped at the designated position in the sleeve, so that subsequent well repair construction is facilitated.
In addition, due to the existence of the ball seat 6, the inside of the casing pipe is always communicated before the ball is thrown, so that the large-flow circulating well washing can be carried out in the process of putting the positioning device and other well repairing tools, the working efficiency of the whole well cementation and well repairing operation is greatly improved, and the time cost is saved.
It should be noted that the working mode of the positioning device in the present application is not limited to the above example, the ball seat 6 in the central tube 1 may also be replaced by a rupture disc, when in use, a ball is not required to be thrown, when the upper wellhead is pressurized, the rupture disc bears pressure and is suppressed in the central tube 1, first, the hydraulic cylinder shear pin 41 is sheared off, and the hydraulic cylinder sleeve 4 slides down to release the expansion snap ring 3 to realize positioning; and continuously pressurizing the inlet, and finally, bearing and breaking the rupture disc to ensure that the central pipe 1 is communicated, thereby completing the subsequent workover operation. Of course, many different structures and methods may be employed.
Further, referring to fig. 1, a limit ring 13 is further arranged on the outer wall of the middle part of the central tube 1, and the expansion snap ring 3 is arranged on the upper part of the limit ring 13; still including righting the ring 2, the coaxial cover of righting the ring 2 is established in the outside of center tube 1, and righting the ring 2 setting in the top of inflation snap ring 3. The setting of spacing ring 13 and centering ring 2 has realized spacing fixed to inflation snap ring 3 in the axial, avoids appearing inflation snap ring 3 along the axial float and lead to the phenomenon that the location is inaccurate or drop, is favorable to guaranteeing the precision of location and guarantees location structure's stability.
Further, referring to fig. 1, the central tube further comprises an outer sheath 7, wherein the outer sheath 7 is arranged at the lower end of the central tube 1; the outer sheath 7 comprises an outer sheath part 72 and a connecting part 73, the lower part of the central tube 1 is provided with a mounting part 14, and the connecting part 73 is connected with the mounting part 14; an installation groove 71 is clamped between the outer protection part 72 and the central tube 1, and the lower end of the hydraulic cylinder sleeve 4 is arranged in the installation groove 71.
Still further, with continued reference to fig. 1, there is a travel gap between the lower end surface of the cylinder liner 4 and the upper end surface of the connecting portion 73; the length of the stroke gap is not less than the width of the expansion snap ring 3.
The setting of oversheath 7, cylinder liner 4 can be protected to its outer jacket portion 72, avoid cylinder liner 4 to go into the in-process under and sleeve pipe inner wall bumps and lead to the inflation snap ring 3 to be released in advance down, mounting groove 71 between oversheath 7 and the center tube 1 has also reserved sufficient stroke clearance for the gliding of cylinder liner 4 simultaneously, when guaranteeing that inflation snap ring 3 can be released, avoid cylinder liner 4 to lose directly to throw into the shaft bottom after fixing, make things convenient for the recycle of equipment.
Further, referring to fig. 1, the device further comprises a guide head 8, wherein the guide head 8 is arranged below the outer sheath 7, and the guide head 8 is connected with the mounting part 14. The arrangement of the guide head 8 is favorable for matching with the centralizing ring 2 at the upper end to ensure that the positioning device is always positioned in the axial direction of the sleeve, thereby facilitating the running-in of the positioning device and other well repairing equipment. In a preferred example, the connecting portion 73 and the guide head 8 each have an internal thread, the mounting portion 14 being provided with an external thread; the connecting portion 73 and the guide head 8 are connected to the mounting portion 14 by screw-fitting. It should be noted that the connection portion 73 and the connection manner of the guide head 8 and the central tube 1 are not particularly limited in the present application, and the above distance is only a preferred embodiment of the present application, and other different connection manners and connection structures such as bolt connection, clamping connection and the like may be adopted.
Further, refer to fig. 1 and show, be provided with sealing member 9 between the outer wall of hydraulic cylinder cover 4 and center tube 1, be provided with sealing member 9 between the inner wall of ball seat 6 and center tube 1, sealing member 9 is provided with and does benefit to the sealing performance who further promotes between each part to guarantee positioner normal use in this application, and then guarantee the normal clear of whole workover. The structure and type of the sealing element 9 are not specifically limited in the present application, and the sealing element may be a sealing rubber ring or other sealing device and sealing structure.
The method can be realized by adopting or referring to the prior art in places which are not described in the utility model.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments.
The above description is only an example of the present invention, and is not intended to limit the present invention. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (10)
1. The underground pipe inner positioning device is characterized by comprising a central pipe, wherein a hydraulic cylinder sleeve is sleeved on the periphery of the middle part of the central pipe, and the lower end of the hydraulic cylinder sleeve is fixed with the central pipe through a hydraulic cylinder shear pin; the hydraulic cylinder is characterized by further comprising an expansion clamping ring, a mounting gap is arranged between the upper end of the hydraulic cylinder sleeve and the outer wall of the central pipe in a clamped mode, and the expansion clamping ring is arranged in the mounting gap in a pre-compression mode;
after the hydraulic cylinder shear pin is sheared off, the hydraulic cylinder sleeve can slide downwards relative to the central pipe, so that the expansion snap ring in the installation gap is released.
2. The downhole in-pipe positioning device of claim 1, further comprising a ball seat disposed inside the base pipe, the ball seat secured to the base pipe by a ball seat shear pin;
the outer side wall of the ball seat is provided with a first fixing hole, the central pipe is provided with a first shear pin hole corresponding to the first fixing hole, and the first shear pin hole penetrates through the side wall of the central pipe; the ball seat shear pin penetrates through the first shear pin hole and extends into the first fixing hole.
3. The downhole in-pipe positioning device as recited in claim 2, wherein the base pipe further has a second shear pin hole, the lower end of the cylinder sleeve is provided with a second fixing hole, and the cylinder shear pin passes through the second fixing hole and extends into the second shear pin hole; the first shear pin hole is arranged above the second shear pin hole.
4. The downhole in-pipe positioning device of claim 3, wherein the middle outer wall of the base pipe is further provided with a stop ring, and the expansion snap ring is arranged on the upper portion of the stop ring.
5. The downhole in-pipe positioning device of claim 3 further comprising a centralizing ring coaxially sleeved outside the base pipe, the centralizing ring disposed above the expansion snap ring.
6. The downhole in-pipe positioning device of claim 5 further comprising an outer jacket disposed at a lower end of the base pipe; the outer sheath comprises an outer protection part and a connecting part, the lower part of the central tube is provided with a mounting part, and the connecting part is connected with the mounting part;
the outer guard portion with press from both sides between the center tube and be equipped with the mounting groove, the lower extreme setting of cylinder liner is in the mounting groove.
7. The downhole tubular positioning apparatus of claim 6, wherein a travel gap is provided between a lower end surface of the cylinder liner and an upper end surface of the connecting portion; the length of the stroke gap is not less than the width of the expansion snap ring.
8. The downhole intraductal positioning device of claim 6 further comprising a guide head disposed below the outer sheath, the guide head coupled to the mounting portion.
9. The downhole tubular positioning apparatus of claim 8 wherein the connecting portion and the guide head each have internal threads and the mounting portion is provided with external threads; the connecting part and the guide head are connected with the mounting part through thread fit.
10. The downhole in-pipe positioning device of claim 5, wherein a seal is disposed between the cylinder sleeve and an outer wall of the base pipe, and a seal is disposed between the ball seat and an inner wall of the base pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122994542.3U CN216240514U (en) | 2021-12-01 | 2021-12-01 | Positioning device in underground pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122994542.3U CN216240514U (en) | 2021-12-01 | 2021-12-01 | Positioning device in underground pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216240514U true CN216240514U (en) | 2022-04-08 |
Family
ID=80960124
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122994542.3U Active CN216240514U (en) | 2021-12-01 | 2021-12-01 | Positioning device in underground pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216240514U (en) |
-
2021
- 2021-12-01 CN CN202122994542.3U patent/CN216240514U/en active Active
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