CN214464009U - Tail pipe tie-back sealing tool - Google Patents
Tail pipe tie-back sealing tool Download PDFInfo
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- CN214464009U CN214464009U CN202022966351.1U CN202022966351U CN214464009U CN 214464009 U CN214464009 U CN 214464009U CN 202022966351 U CN202022966351 U CN 202022966351U CN 214464009 U CN214464009 U CN 214464009U
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Abstract
The utility model relates to a tail pipe tieback sealing tool, which comprises an upper joint, an upper mandrel, a middle body, a movable sleeve and a plug body which are all in sleeve-shaped structures; one end of the upper joint is fixedly connected with one end of the upper mandrel, the other end of the upper mandrel is fixedly connected with one end of the middle body, and the other end of the middle body is fixedly connected with the plug body; the outer wall of the upper mandrel is sleeved with an anchoring mechanism, the outer wall of the middle body is sequentially sleeved with an upper rubber cylinder shoulder protector, an upper rubber cylinder, a middle isolation ring, a lower rubber cylinder shoulder protector and a baffle ring from top to bottom, and the movable sleeve is fixedly arranged on the inner wall of the middle body; the outer wall of the middle body below the retaining ring is provided with a driving mechanism, the driving mechanism can drive the anchoring mechanism to anchor the tie-back pipe string and can drive the upper rubber cylinder and the lower rubber cylinder to expand, and the tie-back sealing tool can be released from anchoring and expanding sealing by pushing the movable sleeve to act on the driving mechanism. The utility model discloses can realize sitting and hang, sit and seal and hang, the function of deblocking, the reliability is high.
Description
Technical Field
The utility model belongs to the technical field of oil gas well cementation, especially, relate to a tail pipe tieback sealing tool.
Background
The tail pipe tieback technology is a well cementing process which uses a tieback device to tieback a lower tail pipe to a wellhead or a certain position in a well to cover an upper casing which is damaged or has low strength, so that the upper casing is repaired or an oil-gas upward channeling channel at the overlapped section of the tail pipes is plugged. In recent years, special wells and complex wells are increased continuously, the pressure coefficient of the formation of a part of wells is low, the density window of drilling fluid is narrow, overflow and leakage are stored at the same time, and the conventional tail pipe tie-back technology is difficult to implement. At present, the tie-back tools at home and abroad are also more and are relatively mature, such as simple tie-back plug sealing tools and top sealing tie-back tools. The simple tieback plug sealing tool is easy to damage and lose efficacy. The top packing tie-back tool is added with a packer part on the basis of a tie-back plug sealing tool, and has a good supplementary sealing function. However, in some special wells, in the oil extraction process, the pressure of a well bore is high, which may cause high pressure acting on the end face of the sealing plug, and the whole tie-back pipe string has the effect of pushing up, which may cause damage to a well head tool and easily cause accidents. In addition, some wells need to be pulled up out of the well repair at the later stage of exploitation, and if the sealed part cannot be unsealed or hung, the well repair can not be pulled out of the tieback pipe string.
Therefore, based on the problems, the tail pipe tie-back sealing tool can realize the functions of hanging, setting, hanging releasing and unpacking, has high reliability, solves the problems of sealing and anchoring of the conventional tail pipe tie-back tool, lifting of subsequent tail pipe strings and the like, and has important practical significance.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art not enough, provide a can realize sitting and hang, sit to seal and separate the function of hanging, the deblocking, the reliability is high, solves the tail pipe tieback sealing tool of the play scheduling problem of current tail pipe tieback instrument sealed, anchoring and follow-up tail pipe cluster.
The utility model provides a its technical problem take following technical scheme to realize:
a tail pipe tieback sealing tool comprises an upper joint, an upper mandrel, a middle body, a movable sleeve and a plug body which are all sleeve-shaped structures;
one end of the upper joint is fixedly connected with one end of the upper mandrel, the other end of the upper mandrel is fixedly connected with one end of the middle body, and the other end of the middle body is fixedly connected with the plug body; the outer wall of the upper mandrel is sleeved with an anchoring mechanism, the outer wall of the middle body is sequentially sleeved with an upper rubber cylinder shoulder protector, an upper rubber cylinder, a middle isolation ring, a lower rubber cylinder shoulder protector and a retaining ring from top to bottom, and the movable sleeve is fixedly arranged on the inner wall of the middle body; the outer wall of the middle body below the baffle ring is provided with a driving mechanism, the driving mechanism can drive the anchoring mechanism to anchor the tieback pipe string and can drive the upper rubber cylinder and the lower rubber cylinder to expand, and the tieback sealing tool can be released from anchoring and expanding sealing by pushing the movable sleeve to act on the driving mechanism.
Furthermore, the driving mechanism comprises a plurality of guide blocks, a movable cylinder sleeve and a limiting outer ring, a plurality of axial guide grooves are formed in the side wall of the middle body, the guide blocks are installed in the guide grooves and fixedly connected with the movable sleeve, an inner limiting ring is sleeved around the guide blocks, first inverted teeth are arranged on the outer surface of the inner limiting ring, and the inner limiting ring is fixedly connected with the guide blocks through first shear pins; the movable cylinder sleeve is fixedly sleeved on the outer wall of the middle body through a second shear pin and covers the guide block, the limiting outer ring is sleeved on the outer wall of the middle body and is positioned at the bottommost part in the movable cylinder sleeve, and second inverted teeth are arranged on the outer surface of the limiting outer ring; when the movable cylinder sleeve moves, the limiting outer ring and the inner limiting ring can be driven to be locked through the matching of the inverted teeth.
Further, anchoring mechanism includes two-way slips, two-way slips cover is established on the upper spindle outer wall, and two-way slips installs in the slips urceolus, both sides are connected the cooperation with last taper sleeve, lower taper sleeve respectively about the slips urceolus, just anchoring mechanism is spacing in the axial at initial state, and two-way slips is in the contraction state under the effect of spring.
Furthermore, the device also comprises a limiting sleeve, wherein one end of the limiting sleeve is fixedly connected with the upper joint, and the other end of the limiting sleeve is fixedly connected with the upper taper sleeve.
Furthermore, a limiting block is arranged between the upper joint and the upper taper sleeve, and the limiting block is matched with a step structure on the outer wall of the upper mandrel, so that the upper mandrel can be prevented from moving downwards.
Furthermore, a centering sleeve is sleeved between the lower taper sleeve and the shoulder protector of the upper sleeve, and the centering sleeve is positioned on the outer wall of the fixed connection position of the upper mandrel and the middle body.
Furthermore, a plurality of elastic claws are arranged on the side wall of the movable sleeve, two groups of limiting grooves are axially arranged on the inner wall of the middle body, the elastic claws are embedded into the upper limiting grooves in an initial state, when the movable sleeve is pushed, the elastic claws are extruded, deformed and inwardly contracted, and then sink into the lower limiting grooves in a downward direction, and the movable sleeve drives the limiting blocks to shear the first shear pins in the downward direction.
Furthermore, three groups of sealing grooves are formed in the outer wall of the plug body, and the upstream group is a dovetail groove structure.
Further, the upper end of the upper connector can be connected with the upper sleeve through sleeve threads.
The utility model has the advantages that:
the utility model discloses a collect anchoring, rise to seal, deblocking and insert and seal in an organic whole, can realize sitting the function of hanging, sitting and sealing and hanging, deblocking, the reliability is high.
Drawings
The technical solution of the present invention will be described in further detail with reference to the accompanying drawings and examples, but it should be understood that these drawings are designed for illustrative purposes only and thus are not intended to limit the scope of the present invention. Furthermore, unless otherwise indicated, the drawings are intended to be illustrative of the structural configurations described herein and are not necessarily drawn to scale.
Fig. 1 is a schematic upper structure view of a tail pipe tieback sealing tool according to an embodiment of the present invention;
fig. 2 is a schematic view of a middle part of a tail pipe tieback sealing tool according to an embodiment of the present invention;
fig. 3 is a schematic structural view of a lower portion of a tailpipe tie-back sealing tool according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a part of a middle body of a tail pipe tieback sealing tool according to an embodiment of the present invention;
fig. 5 is a schematic structural view of a movable sleeve of a tail pipe tieback sealing tool according to an embodiment of the present invention;
FIG. 6 is a schematic view of the structure of FIG. 5 along the line A-A;
Detailed Description
First, it should be noted that the specific structures, features, advantages, etc. of the present invention will be described in detail below by way of example, but all the descriptions are only for illustrative purpose and should not be construed as forming any limitation to the present invention. Furthermore, any single feature described or implicit in any embodiment or any single feature shown or implicit in any drawing may still be combined or subtracted between any of the features (or equivalents thereof) to obtain still further embodiments of the invention that may not be directly mentioned herein. In addition, for the sake of simplicity, the same or similar features may be indicated in only one place in the same drawing.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
The present invention will be described in detail with reference to fig. 1 to 6.
As shown in fig. 1-6, the tailpipe tie-back sealing tool provided by the present embodiment includes an upper joint 1, an upper mandrel 4, a middle body 14, a movable sleeve 15, a plug body 27, all of which are sleeve-shaped structures;
one end of the upper joint 1 is fixedly connected with one end of the upper mandrel 4, the other end of the upper mandrel 4 is hermetically connected with one end of the middle body through threads, and the other end of the middle body is fixedly connected with the plug body through threads; the outer wall of the upper mandrel 4 is sleeved with an anchoring mechanism, the outer wall of the middle body is sequentially sleeved with an upper rubber cylinder shoulder protector 12, an upper rubber cylinder 13, a middle isolating ring 16, a lower rubber cylinder 17, a lower rubber cylinder shoulder protector 18 and a baffle ring 19 from top to bottom, and the movable sleeve 15 is fixedly arranged on the inner wall of the middle body 14; the outer wall of the middle body below the baffle ring 19 is provided with a driving mechanism, the driving mechanism can drive the anchoring mechanism to anchor the tieback pipe string and can drive the upper rubber cylinder 13 and the lower rubber cylinder 17 to expand, and the tieback sealing tool can be released from anchoring and expansion sealing by pushing the movable sleeve 15 to act on the driving mechanism.
The driving mechanism comprises a plurality of guide blocks 21, a movable cylinder sleeve 24 and a limiting outer ring 25, a plurality of axial guide grooves 1401 are formed in the side wall of the middle body 14, the guide blocks 21 are installed in the guide grooves and fixedly connected with the movable sleeve through first jackscrews 20, an inner limiting ring 23 is sleeved around the guide blocks 21, first inverted teeth are arranged on the outer surface of the inner limiting ring 23, and the inner limiting ring 23 is fixedly connected with the guide blocks 21 through first shear pins 22; the movable cylinder sleeve 24 is fixedly sleeved on the outer wall of the middle body through a second shear pin 26 and covers the guide block, the limiting outer ring 25 is sleeved on the outer wall of the middle body and is positioned at the bottommost part in the movable cylinder sleeve 24, and second inverted teeth are arranged on the outer surface of the limiting outer ring 25; when the movable cylinder sleeve 24 moves, the limiting outer ring 25 and the inner limiting ring can be driven to be locked through the matching of the inverted teeth.
The anchoring mechanism comprises a bidirectional slip 8, the bidirectional slip 8 is sleeved on the outer wall of the upper mandrel 4, the bidirectional slip 8 is installed in a slip outer cylinder 7, the upper side and the lower side of the slip outer cylinder 7 are respectively connected and matched with an upper taper sleeve 6 and a lower taper sleeve 10, the anchoring mechanism is limited in the axial direction in an initial state, the bidirectional slip is in a contraction state under the action of a spring 9, it needs to be explained that the bidirectional slip 8, the slip outer cylinder 7, the upper taper sleeve 6 and the lower taper sleeve 10 can all adopt existing products, and detailed structures are not repeated; the two-way slip is adopted for anchoring, so that the pipe string can bear large jacking force once the pipe string is hung, and the pipe string can be prevented from jumping upwards and losing sealing effect in the subsequent mining process.
Still include stop collar 3, 3 one end of stop collar and top connection 1 pass through second jackscrew 2 fixed connection, the other end with go up taper sleeve 6 and pass through screw thread fixed connection.
Install stopper 5 between top connection 1 and the last taper sleeve 6, stopper 5 and the stair structure cooperation on the 4 outer walls of last dabber can prevent that upper spindle 4 from shifting down.
A centering sleeve 11 is sleeved between the lower taper sleeve 10 and the upper sleeve shoulder protector 12, and the centering sleeve is positioned on the outer wall of the fixed connection part of the upper mandrel 4 and the middle body.
The side wall of the movable sleeve 15 is provided with a plurality of elastic claws 1501, the inner wall of the middle body 14 is axially provided with two groups of limiting grooves which are a first group of limiting grooves 1402 and a second group of limiting grooves 1403 respectively, the elastic claws 1501 are embedded into the first group of limiting grooves 1402 in an initial state, when the movable sleeve is pushed, the elastic claws are extruded, deformed and contracted inwards, then the elastic claws sink into the second group of limiting grooves 1403 in a downward mode, and the movable sleeve drives the limiting blocks to shear the first shear pins in the downward mode.
The outer wall of the plug body 27 is provided with three groups of sealing grooves, namely a first group of sealing grooves 28, a second group of sealing grooves 29 and a third group of sealing grooves 30, wherein the first group of sealing grooves 28 are in a dovetail groove structure, and the other two groups of sealing grooves are in an O-shaped sealing ring structure.
The upper end of the upper joint can be connected with the upper sleeve through sleeve threads.
For example, in this embodiment, during actual use, a matching sealing element is installed in a sealing groove of a plug body, the plug body is connected to the lowest end of a tieback pipe string, and is lowered into a tieback cylinder of a liner hanger, a downward-pressing plug body is inserted into the tieback cylinder, the lower end face of a movable cylinder sleeve is seated at a bell mouth of the tieback cylinder, and is pressed downward continuously to shear a second shear pin 26, the movable cylinder sleeve pushes a rubber cylinder to go upward, and then pushes a lower cone sleeve to go upward, a bidirectional slip is lifted out, and a slip is hung by sitting, so that the slip engages with the inside of an upper sleeve to play a role of anchoring the tieback pipe string; and (4) continuously pressing down, the rubber cylinder cannot go upwards, and the rubber cylinder is sealed in an expanding way to seal an annular space between the tie-back pipe string and the upper-layer sleeve. At this moment, spacing outer loop passes through pawl cooperation locking with interior spacing ring, and spacing outer loop has the restriction of movable cylinder liner again, consequently under the effect of pawl structure, relative motion does not take place between movable cylinder liner and well body, the movable sleeve, and the packer setting finishes, and after the release upper portion pressure, also can not the deblocking. When the later stage need play out the pipe cluster, specialized tool can be gone into down, promotes the movable sleeve and descends, cuts first shear pin 22, and interior spacing ring separates with the stopper, and the activity cylinder liner breaks away from with well body promptly, and the packing element is the reconversion under self elasticity, and the slips also contracts under the effect of spring, can realize the deblocking, unhook, and upward the pipe cluster can play out whole tieback pipe cluster, carries out follow-up construction.
The above embodiments are described in detail, but the above description is only for the preferred embodiments of the present invention, and should not be construed as limiting the scope of the present invention. All the equivalent changes and improvements made according to the application scope of the present invention should still fall within the patent coverage of the present invention.
Claims (9)
1. A tailpipe tieback seal tool, comprising: comprises an upper joint, an upper mandrel, a middle body, a movable sleeve and a plug body which are all sleeve-shaped structures;
one end of the upper joint is fixedly connected with one end of the upper mandrel, the other end of the upper mandrel is fixedly connected with one end of the middle body, and the other end of the middle body is fixedly connected with the plug body; the outer wall of the upper mandrel is sleeved with an anchoring mechanism, the outer wall of the middle body is sequentially sleeved with an upper rubber cylinder shoulder protector, an upper rubber cylinder, a middle isolation ring, a lower rubber cylinder shoulder protector and a retaining ring from top to bottom, and the movable sleeve is fixedly arranged on the inner wall of the middle body; the outer wall of the middle body below the baffle ring is provided with a driving mechanism, the driving mechanism can drive the anchoring mechanism to anchor the tieback pipe string and can drive the upper rubber cylinder and the lower rubber cylinder to expand, and the tieback sealing tool can be released from anchoring and expanding sealing by pushing the movable sleeve to act on the driving mechanism.
2. A tailpipe tieback sealing tool according to claim 1, wherein: the driving mechanism comprises a plurality of guide blocks, a movable cylinder sleeve and a limiting outer ring, a plurality of axial guide grooves are formed in the side wall of the middle body, the guide blocks are installed in the guide grooves and are fixedly connected with the movable sleeve, an inner limiting ring is sleeved around the guide blocks, first inverted teeth are arranged on the outer surface of the inner limiting ring, and the inner limiting ring is fixedly connected with the guide blocks through first shear pins; the movable cylinder sleeve is fixedly sleeved on the outer wall of the middle body through a second shear pin and covers the guide block, the limiting outer ring is sleeved on the outer wall of the middle body and is positioned at the bottommost part in the movable cylinder sleeve, and second inverted teeth are arranged on the outer surface of the limiting outer ring; when the movable cylinder sleeve moves, the limiting outer ring and the inner limiting ring can be driven to be locked through the matching of the inverted teeth.
3. A tailpipe tieback sealing tool according to claim 2, wherein: the anchoring mechanism comprises a bidirectional slip, the bidirectional slip is sleeved on the outer wall of the upper mandrel, the bidirectional slip is installed in the slip outer barrel, the upper side and the lower side of the slip outer barrel are respectively connected and matched with the upper taper sleeve and the lower taper sleeve, the anchoring mechanism is limited in the axial direction in an initial state, and the bidirectional slip is in a contraction state under the action of the spring.
4. A tailpipe tieback sealing tool according to claim 3, wherein: the limiting sleeve is characterized by further comprising a limiting sleeve, one end of the limiting sleeve is fixedly connected with the upper joint, and the other end of the limiting sleeve is fixedly connected with the upper taper sleeve.
5. A tailpipe tieback sealing tool according to claim 4, wherein: a limiting block is arranged between the upper joint and the upper taper sleeve, and the limiting block is matched with a step structure on the outer wall of the upper mandrel, so that the upper mandrel can be prevented from moving downwards.
6. A tailpipe tieback sealing tool according to claim 3, wherein: a centering sleeve is sleeved between the lower taper sleeve and the upper sleeve shoulder protector, and the centering sleeve is positioned on the outer wall of the fixed connection position of the upper mandrel and the middle body.
7. A tailpipe tieback sealing tool according to claim 5, wherein: the side wall of the movable sleeve is provided with a plurality of elastic claws, the inner wall of the middle body is axially provided with two groups of limiting grooves, the elastic claws are embedded into the upper limiting grooves in an initial state, when the movable sleeve is pushed, the elastic claws are extruded, deformed and contracted inwards, and then sink into the lower limiting grooves downwards, and the movable sleeve drives the limiting blocks to shear the first shear pins when going downwards.
8. A tailpipe tieback sealing tool according to claim 1, wherein: the plug is characterized in that three groups of sealing grooves are formed in the outer wall of the plug body, and the group at the most upstream is a dovetail groove structure.
9. A tailpipe tieback sealing tool according to claim 1, wherein: the upper end of the upper joint can be connected with the upper sleeve through sleeve threads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022966351.1U CN214464009U (en) | 2020-12-10 | 2020-12-10 | Tail pipe tie-back sealing tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022966351.1U CN214464009U (en) | 2020-12-10 | 2020-12-10 | Tail pipe tie-back sealing tool |
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| Publication Number | Publication Date |
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| CN214464009U true CN214464009U (en) | 2021-10-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022966351.1U Active CN214464009U (en) | 2020-12-10 | 2020-12-10 | Tail pipe tie-back sealing tool |
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| CN (1) | CN214464009U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114086918A (en) * | 2021-11-11 | 2022-02-25 | 川南航天能源科技有限公司 | Hydraulic tie-back tool |
-
2020
- 2020-12-10 CN CN202022966351.1U patent/CN214464009U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114086918A (en) * | 2021-11-11 | 2022-02-25 | 川南航天能源科技有限公司 | Hydraulic tie-back tool |
| CN114086918B (en) * | 2021-11-11 | 2023-09-12 | 川南航天能源科技有限公司 | Hydraulic tieback tool |
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