CN112324385B - Block type reverse high-pressure resistant self-locking rubber plug seat nipple - Google Patents
Block type reverse high-pressure resistant self-locking rubber plug seat nipple Download PDFInfo
- Publication number
- CN112324385B CN112324385B CN202011405432.2A CN202011405432A CN112324385B CN 112324385 B CN112324385 B CN 112324385B CN 202011405432 A CN202011405432 A CN 202011405432A CN 112324385 B CN112324385 B CN 112324385B
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- clamping block
- rubber plug
- clamping
- block group
- sleeve
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
- E21B33/134—Bridging plugs
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
Abstract
The invention relates to a clamping block type reverse high-pressure resistant self-locking rubber plug seat short section which comprises a collision pressing short section body, a sliding block sleeve body and an inner sleeve, wherein the collision pressing short section body, the sliding block sleeve body and the inner sleeve are all of sleeve-shaped structures; an upper clamping block groove and a lower clamping block groove which can be matched and matched with the first clamping block group and the second clamping block group respectively are arranged on the inner wall of the bumping nipple body; the sliding block sleeve body is hermetically sleeved on the inner wall of the impact short section body, the inner sleeve is fixed on the inner wall of the sliding block sleeve body through a shearing pin, and a second clamping block group positioning mechanism is further arranged between the impact short section body below the sliding block sleeve body and the inner sleeve; the invention does not increase the prior construction process, realizes the rotation-proof self-locking function of the rubber plug, and can ensure that the sealing surface of the rubber plug and the rubber plug seat short section bears the reverse pressure.
Description
Technical Field
The invention belongs to the technical field of petroleum and natural gas well cementing tools, and particularly relates to a clamping block type reverse high-pressure resistant self-locking rubber plug seat short section.
Background
After the well drilling operation is finished, in order to enable the production to be smooth in the future, the well cementation operation is required to be carried out, but before the well cementation operation is carried out, because the well is still provided with the well drilling mud which does not return to the ground, the conventional well cementation operation is carried out, and before the cement is injected, the mud which is still left in the well in the casing pipe is required to be separated from the cement slurry to be injected by using a rubber plug, so that the problem that the well drilling mud and the well cementation cement slurry are mixed to prevent the well cementation cement slurry from being polluted by the well drilling mud is solved; the isolation rubber plug put into the well is pushed by the displacement fluid before the well cementation and the water injection mud, descends from the well mouth to the floating collar and is pressed, then the work of the well cementation and the water injection mud is carried out, and finally the effect of forming good cement sealing quality at the position of the casing shoe is achieved; the conventional rubber plug has incomplete self-locking function after being impacted and cannot resist reverse high pressure.
Therefore, based on the problems, the clamping block type reverse high-pressure resistant self-locking rubber plug seat short section is provided, the operation is simple and easy, the rotation-preventing self-locking function of the rubber plug is realized without increasing the existing construction procedures, the sealing surface of the rubber plug and the rubber plug seat short section can bear reverse pressure, the hidden danger that annular cement slurry flows backwards and returns into a sleeve pipe when the floating hoop sealing fails can be eliminated, and the well cementation quality is ensured.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides the clamping block type reverse high pressure resistant self-locking rubber plug seat short section, is simple and easy to operate, can realize the anti-rotation self-locking function of the rubber plug without increasing the prior construction process, can enable the sealing surface of the rubber plug and the rubber plug seat short section to bear reverse pressure, can eliminate the hidden danger of annular cement slurry flowing back into a sleeve when the floating hoop sealing fails, and ensures the well cementation quality.
The technical problem to be solved by the invention is realized by adopting the following technical scheme:
a clamping block type reverse high-pressure resistant self-locking rubber plug seat pup joint comprises a collision pressing pup joint body, a sliding block sleeve body and an inner sleeve which are all of sleeve-shaped structures, wherein a first clamping block group and a second clamping block group are arranged on the side wall of the sliding block sleeve body in the axial direction and respectively comprise at least two clamping blocks, and the clamping blocks of the first clamping block group and the second clamping block group are limited at the axial part of the sliding block sleeve body; an upper clamping block groove and a lower clamping block groove which can be matched and matched with the first clamping block group and the second clamping block group respectively are formed in the inner wall of the collision pressing nipple joint body; the sliding block sleeve body is sleeved on the inner wall of the contact pressure short section body in a sealing mode, the inner sleeve is fixed on the inner wall of the sliding block sleeve body through a shearing pin, and a second clamping block group positioning mechanism is further arranged between the contact pressure short section body below the sliding block sleeve body and the inner sleeve;
in an initial state, the clamping blocks of the first clamping block group are all tightly matched with the upper clamping block groove, and the clamping block of the second clamping block group is not tightly matched with the lower clamping block groove and is positioned above the lower clamping block groove; after the rubber plug is partially clamped into the inner sleeve, the rubber plug is clamped and matched with the clamping block of the first clamping block group through axial movement, and the clamping block of the second clamping block group is clamped and matched with the lower clamping block groove, so that the rubber plug is axially limited.
Furthermore, a protrusion is arranged on the side wall of the fixture block in a surrounding mode, an inclined connecting surface is formed between the outer side wall of the protrusion and the side wall of the fixture block, and the shapes of the upper fixture block groove and the lower fixture block groove are matched with the shape of the protrusion, so that the fixture block is tightly matched with the upper fixture block groove and the lower fixture block groove through the protrusion.
Furthermore, the second fixture block group positioning mechanism comprises a positioning ring, the positioning ring is sleeved on the outer wall of the inner sleeve, part of the positioning ring is inserted between the sliding block sleeve body and the inner sleeve, and the positioning ring is limited in the axial direction of the impact short section body; when the sliding block sleeve body moves axially, the clamping blocks of the second clamping block group are limited by the positioning ring, so that the clamping blocks of the second clamping block group are clamped into the lower clamping block groove.
Further, a support ring is fixedly arranged on the outer wall of the positioning ring, and the support ring is axially limited by a clamp spring on the inner wall of the abutting pressing nipple body.
Furthermore, a rubber plug clamping block groove is formed in the side wall of the rubber plug, and the inner sleeve and the sliding block sleeve body are driven to move successively during axial movement, so that the clamping block of the first clamping block group is separated from the upper clamping block groove and is clamped and matched with the rubber plug clamping block groove of the rubber plug.
Further, the rubber plug pushes the inner sleeve to cut off the shearing pin to move downwards, when the rubber plug moves downwards to the rubber plug clamping block groove to be right opposite to the clamping block of the first clamping block group, the step structure on the outer wall of the rubber plug is matched with the sliding block sleeve body to push the sliding block sleeve body to move downwards, so that the clamping block of the first clamping block group is separated from the upper clamping block groove and is tightly clamped and matched with the rubber plug clamping block groove of the rubber plug.
Furthermore, the clamping blocks of the first clamping block group and the second clamping block group are symmetrically distributed on the side wall of the sliding block sleeve body, clamping block fixing pins are fixedly inserted into the sliding block sleeve body, and the clamping block fixing pins penetrate through the clamping blocks of the first clamping block group and the second clamping block group, so that the clamping blocks of the first clamping block group and the second clamping block group are limited in the axial part of the sliding block sleeve body.
The invention has the advantages and positive effects that:
the sliding block sleeve body is provided with two groups of clamping blocks, and the clamping block of the first clamping block group can be meshed with a rubber plug clamping block groove of a rubber plug to lock the rubber plug; the clamping blocks of the second clamping block group can form meshing with the lower clamping block groove on the bumping short section body, and the sliding block sleeve body is locked and can bear forward and reverse pressure without migration.
Drawings
The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and examples, but it should be understood that these drawings are designed for illustrative purposes only and thus do not 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 cross-sectional view of the structure of the rubber plug provided in the embodiment of the present invention;
FIG. 2 is a structural section view of a block type reverse high pressure resistant self-locking rubber plug seat short section provided by the embodiment of the invention;
fig. 3 is a schematic diagram illustrating the engagement between the pressed rubber plug and the first block set;
fig. 4 is a schematic diagram illustrating engagement between a fixture block of the second fixture block set and a lower fixture block groove according to an embodiment of the present invention;
Detailed Description
First, it should be noted that the specific structures, features, advantages, etc. of the present invention will be specifically described below by way of example, but all the descriptions are for illustrative purposes only and should not be construed as limiting the present invention in any way. 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", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, 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 4.
As shown in fig. 1-4, the block type reverse high-pressure resistant self-locking rubber plug seat pup joint provided in this embodiment includes a collision pressure pup joint body 4, a slider sleeve body 7, and an inner sleeve 14, which are both sleeve-shaped structures, wherein a first block set and a second block set are axially installed on a side wall of the slider sleeve body 7, and both the first block set and the second block set include at least two blocks, and the blocks of the first block set and the second block set are limited at an axial portion of the slider sleeve body 7; an upper clamping block groove 9 and a lower clamping block groove 12 which can be matched and matched with the first clamping block group and the second clamping block group respectively are arranged on the inner wall of the collision pressing nipple joint body 4; the sliding block sleeve body 7 is hermetically sleeved on the inner wall of the impact short section body 4 through a first sealing ring 5, the inner sleeve 14 is fixed on the inner wall of the sliding block sleeve body 7 through a shearing pin 6, and a second clamping block group positioning mechanism is further arranged between the impact short section body 4 and the inner sleeve 14 below the sliding block sleeve body 7;
in an initial state, the fixture blocks 8 of the first fixture block group are tightly fitted with the upper fixture block groove 9, and the fixture block 11 of the second fixture block group is not tightly fitted with the lower fixture block groove 12 and is positioned above the lower fixture block groove; after the rubber plug is partially clamped into the inner sleeve 14, the rubber plug is in clamping fit with the clamping block 8 of the first clamping block group through axial movement, and the clamping block 11 of the second clamping block group is in clamping fit with the lower clamping block groove 12, so that the rubber plug is axially limited.
The side wall of the fixture block is provided with a protrusion 18 in a surrounding manner, an inclined connecting surface is formed between the outer side wall of the protrusion 18 and the side wall of the fixture block, and the shapes of the upper fixture block groove 9 and the lower fixture block groove 12 are matched with the shape of the protrusion 18, so that the fixture block is tightly clamped and matched with the upper fixture block groove 9 and the lower fixture block groove 12 through the protrusion.
The second fixture block group positioning mechanism comprises a positioning ring 19, the positioning ring 19 is sleeved on the outer wall of the inner sleeve 14, is in sealing contact with the inner sleeve 14 through a second sealing ring 15, is partially inserted between the sliding block sleeve body 7 and the inner sleeve 14, and is limited in the axial direction of the abutting pressing nipple section body 4; when the sliding block sleeve body 7 moves axially, the clamping blocks 11 of the second clamping block group are limited by the positioning ring, so that the clamping blocks of the second clamping block group are clamped into the lower clamping block grooves 12.
A support ring 16 is fixedly arranged on the outer wall of the positioning ring 19, and the support ring is axially limited by a clamp spring 17 on the inner wall of the collision pressure nipple body 4.
The side wall of the rubber plug 1 is provided with a rubber plug clamping block groove 3, and the inner sleeve 14 and the sliding block sleeve body 7 are driven to move in sequence during axial movement, so that a clamping block of the first clamping block group is separated from the upper clamping block groove 9 and is tightly clamped and matched with the rubber plug clamping block groove 3 of the rubber plug;
specifically, the rubber plug 1 is inserted into the inner sleeve 14, and is in sealing contact with the inner sleeve 14 through the third sealing ring 2, so that the inner sleeve 14 is pushed to shear the shearing pin 6 to move downwards, when the rubber plug moves downwards, the rubber plug clamping block groove 3 is just opposite to the clamping block of the first clamping block group, the step structure 20 on the outer wall of the rubber plug is matched with the sliding block sleeve body 7 to push the sliding block sleeve body 7 to move downwards, so that the clamping block of the first clamping block group is separated from the upper clamping block groove 9 and is tightly clamped and matched with the rubber plug clamping block groove 3 of the rubber plug.
It should be noted that the rubber plug used in conjunction with the clip block type reverse high pressure resistant self-locking rubber plug seat pup joint of the present invention needs to have a rubber plug clip groove 3 on the sidewall thereof, and the outer wall of the rubber plug is provided with a step structure 20 capable of cooperating with the slider sleeve body 7 to push the movement thereof, specifically, the rubber plug shown in fig. 1 can be used.
The clamping blocks of the first clamping block group and the second clamping block group are symmetrically distributed on the side wall of the sliding block sleeve body 7, the sliding block sleeve body 7 is fixedly inserted with a clamping block fixing pin 10, and the clamping block fixing pin 10 penetrates through the clamping blocks of the first clamping block group and the second clamping block group, so that the clamping blocks of the first clamping block group and the second clamping block group are limited at the axial part of the sliding block sleeve body 7, and it can be considered that a top thread 13 is installed at the bottom end of the clamping block fixing pin 10, and plays a role in protecting the clamping block fixing pin 10; it should be noted that, in order to realize that the clamping blocks of the first clamping block set and the second clamping block set are movable in the axial direction of the sliding block sleeve body 7, it may be considered that the width of the through hole for the clamping block fixing pin 10 to pass through by the clamping blocks of the first clamping block set and the second clamping block set is greater than the width of the clamping block fixing pin 10, so as to limit the displacement range of the clamping blocks.
For example, in this embodiment, during construction, the upper and lower ends of the impact sub body 4 are respectively connected to a casing, and are lowered to a designated position along with the casing, during well cementing construction, a rubber plug 1 is placed after cement slurry injection is completed to replace drilling fluid, when the rubber plug 1 is moved to the impact sub body 4, the rubber plug 1 and the inner sleeve 14 compositely shear the shear pin 6, push the inner sleeve 14 to move downward, and when the fixture block 8 of the first fixture block group is engaged with the fixture block groove 3 of the rubber plug, the fixture block 8 of the first fixture block group is separated from the upper fixture block groove 9, and push the slide block sleeve body 7 to move downward together; after the fixture block 11 of the second fixture block group is engaged with the lower fixture block groove 12, the fixture block 8 of the first fixture block group and the fixture block 11 of the second fixture block group are combined to lock the rubber plug under the action of the support ring 16, and the well cementation is finished.
The present invention has been described in detail with reference to the above examples, but the description is only for the preferred examples of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (5)
1. The utility model provides a block formula is able to bear or endure reverse high pressure auto-lock plug seat nipple joint which characterized in that: the anti-collision sliding block comprises a collision pressing nipple body, a sliding block sleeve body and an inner sleeve which are all of sleeve-shaped structures, wherein a first clamping block group and a second clamping block group are arranged on the side wall of the sliding block sleeve body in the axial direction, the first clamping block group and the second clamping block group respectively comprise at least two clamping blocks, and the clamping blocks of the first clamping block group and the second clamping block group are limited at the axial part of the sliding block sleeve body; an upper clamping block groove and a lower clamping block groove which can be matched and matched with the first clamping block group and the second clamping block group respectively are formed in the inner wall of the collision pressing nipple joint body; the sliding block sleeve body is sleeved on the inner wall of the contact pressure short section body in a sealing mode, the inner sleeve is fixed on the inner wall of the sliding block sleeve body through a shearing pin, and a second clamping block group positioning mechanism is further arranged between the contact pressure short section body below the sliding block sleeve body and the inner sleeve;
in an initial state, the clamping blocks of the first clamping block group are all tightly matched with the upper clamping block groove, and the clamping block of the second clamping block group is not tightly matched with the lower clamping block groove and is positioned above the lower clamping block groove; after the rubber plug is partially clamped into the inner sleeve, the rubber plug is clamped and matched with a clamping block of the first clamping block group through axial movement, and a clamping block of the second clamping block group is clamped and matched with the lower clamping block groove, so that the rubber plug is axially limited;
the side wall of the rubber plug is provided with a rubber plug clamping block groove, and the inner sleeve and the sliding block sleeve body are driven to move successively during axial movement, so that the clamping block of the first clamping block group is separated from the upper clamping block groove and is clamped and matched with the rubber plug clamping block groove of the rubber plug; the rubber plug is inserted into the inner sleeve and is in sealing contact with the inner sleeve to push the inner sleeve to shear the shearing pin to move downwards, when the rubber plug moves downwards to the rubber plug clamping block groove to be opposite to the clamping block of the first clamping block group, the step structure on the outer wall of the rubber plug is matched with the sliding block sleeve body to push the sliding block sleeve body to move downwards, so that the clamping block of the first clamping block group is separated from the upper clamping block groove and is tightly clamped and matched with the rubber plug clamping block groove of the rubber plug.
2. The clamping block type reverse high pressure resistant self-locking rubber plug seat short joint according to claim 1, characterized in that: the side wall of the fixture block is provided with a bulge in a surrounding manner, an inclined connecting surface is formed between the outer side wall of the bulge and the side wall of the fixture block, and the shapes of the upper fixture block groove and the lower fixture block groove are matched with the shape of the bulge, so that the fixture block is tightly clamped and matched with the upper fixture block groove and the lower fixture block groove through the bulge.
3. The clamping block type reverse high pressure resistant self-locking rubber plug seat short joint according to claim 1, characterized in that: the second fixture block group positioning mechanism comprises a positioning ring, the positioning ring is sleeved on the outer wall of the inner sleeve, part of the positioning ring is inserted between the sliding block sleeve body and the inner sleeve, and the positioning ring is limited in the axial direction of the bumping short section body; when the sliding block sleeve body moves axially, the clamping blocks of the second clamping block group are limited by the positioning ring, so that the clamping blocks of the second clamping block group are clamped into the lower clamping block groove.
4. The clamping block type reverse high pressure resistant self-locking rubber plug seat short joint according to claim 3, characterized in that: the outer wall of the positioning ring is fixedly provided with a support ring, and the support ring is axially limited by a clamp spring on the inner wall of the collision pressure nipple body.
5. The clamping block type reverse high pressure resistant self-locking rubber plug seat short joint according to claim 1, characterized in that: the clamping blocks of the first clamping block group and the second clamping block group are symmetrically distributed on the side wall of the sliding block sleeve body, clamping block fixing pins are fixedly inserted in the sliding block sleeve body, and penetrate through the clamping blocks of the first clamping block group and the second clamping block group, so that the clamping blocks of the first clamping block group and the second clamping block group are limited in the axial part of the sliding block sleeve body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011405432.2A CN112324385B (en) | 2020-12-02 | 2020-12-02 | Block type reverse high-pressure resistant self-locking rubber plug seat nipple |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011405432.2A CN112324385B (en) | 2020-12-02 | 2020-12-02 | Block type reverse high-pressure resistant self-locking rubber plug seat nipple |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112324385A CN112324385A (en) | 2021-02-05 |
| CN112324385B true CN112324385B (en) | 2022-03-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011405432.2A Active CN112324385B (en) | 2020-12-02 | 2020-12-02 | Block type reverse high-pressure resistant self-locking rubber plug seat nipple |
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| CN (1) | CN112324385B (en) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2203390C2 (en) * | 2001-07-25 | 2003-04-27 | Открытое акционерное общество "Акционерная нефтяная компания "Башнефть" | Equal-passage multiple stage cementer |
| US7182135B2 (en) * | 2003-11-14 | 2007-02-27 | Halliburton Energy Services, Inc. | Plug systems and methods for using plugs in subterranean formations |
| CN201650210U (en) * | 2010-01-11 | 2010-11-24 | 中国石油化工股份有限公司 | Bidirectional high-pressure removable bridge plug |
| CN202866745U (en) * | 2012-10-29 | 2013-04-10 | 中国石油化工股份有限公司 | Cement plug positioner |
| CN105064949B (en) * | 2015-08-05 | 2017-12-26 | 中国石油集团川庆钻探工程有限公司 | Drilling liner cementing cement mortar back-flow preventer |
| CN205225178U (en) * | 2015-12-22 | 2016-05-11 | 中国石油化工股份有限公司 | Novel pressure is bumped in auto -lock device |
| CN107829707A (en) * | 2017-11-21 | 2018-03-23 | 中国石油集团西部钻探工程有限公司 | Drilling liner cementing tail pipe plug assembly |
| CN211573476U (en) * | 2019-11-11 | 2020-09-25 | 陕西固德石油工程有限公司 | Self-locking type bumping short joint device |
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2020
- 2020-12-02 CN CN202011405432.2A patent/CN112324385B/en active Active
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| CN112324385A (en) | 2021-02-05 |
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