CN112253045A - Sliding sleeve type impacting seat - Google Patents
Sliding sleeve type impacting seat Download PDFInfo
- Publication number
- CN112253045A CN112253045A CN202011425212.6A CN202011425212A CN112253045A CN 112253045 A CN112253045 A CN 112253045A CN 202011425212 A CN202011425212 A CN 202011425212A CN 112253045 A CN112253045 A CN 112253045A
- Authority
- CN
- China
- Prior art keywords
- sliding sleeve
- joint
- sealing ring
- ball
- wall
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000003116 impacting effect Effects 0.000 title description 3
- 238000007789 sealing Methods 0.000 claims abstract description 50
- 238000010008 shearing Methods 0.000 claims abstract description 8
- 230000006835 compression Effects 0.000 claims description 7
- 238000007906 compression Methods 0.000 claims description 7
- 239000004568 cement Substances 0.000 abstract description 14
- 238000009434 installation Methods 0.000 abstract description 12
- 239000002002 slurry Substances 0.000 abstract description 7
- 238000005553 drilling Methods 0.000 description 11
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 239000011440 grout Substances 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000005067 remediation Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 125000003003 spiro group Chemical group 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/14—Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Check Valves (AREA)
Abstract
The invention relates to the technical field of oilfield cementing operation devices, in particular to a sliding sleeve type bumping seat which comprises a joint, a floating ball check valve, an inner cylinder and a sliding sleeve, wherein the upper end of the joint is provided with the sliding sleeve, the outer side of the sliding sleeve is provided with an installation ring platform, the inner wall of the joint is provided with an installation ring groove, the installation ring platform is installed in the installation ring groove in a sliding and sealing mode, the installation ring platform is fixed with the joint through a shearing pin, the lower end of the sliding sleeve is sleeved with the inner cylinder, the lower end of the inner cylinder is provided with an outer ring platform, the outer ring platform is fixedly installed on the inner wall of the joint, the outer ring platform is provided with a. The invention has reasonable and compact structure and convenient use, can cut off the shearing pin when the well cementation rubber plug presses the sliding sleeve downwards, and the rubber plug and the sliding sleeve move downwards, so that the circulating hole at the lower end of the sliding sleeve is sealed by the upper end of the inner cylinder, thereby effectively preventing cement slurry from returning into the pipe, and having the characteristics of simplicity, convenience, high efficiency and good sealing property.
Description
Technical Field
The invention relates to the technical field of oil field well cementation operation devices, in particular to a sliding sleeve type bumping seat.
Background
In the well cementation operation, when the conventional well cementation operation is finished, the floating collar and the floating shoe are used for sealing, so that cement slurry is prevented from returning. In reality, due to extreme conditions and long-time circulation in the well, the sealing rubber of the floating ball sealing surface is washed for a long time or the floating ball is not centered under high temperature and high pressure, so that the floating collar and the floating shoe are sealed to lose effectiveness, the pipe needs to be pressed for waiting for setting, cement slurry is poured into the casing pipe to form a cement plug, and the well cementation quality is influenced. Delays the later development progress, needs drilling and plugging and cement squeezing remediation, and causes unnecessary economic loss.
Disclosure of Invention
The invention provides a sliding sleeve type bumping seat, which overcomes the defects of the prior art and can effectively solve the problem that cement paste flows back into a sleeve to form a cement plug to influence the well cementation quality due to the failure of floating ball sealing in the well cementation operation.
The technical scheme of the invention is realized by the following measures: the utility model provides a sliding sleeve formula is bumped and is pressed seat, including joint, ball check valve, inner tube and sliding sleeve, the inside sliding sleeve that is equipped with in joint upper end, the sliding sleeve upper end outside is equipped with the collar extension, be equipped with the installation ring groove on the joint inner wall that corresponds collar extension position, collar extension sliding seal installs in the installation ring groove, and the collar extension is together fixed with the joint through the shearing pin, the inside cover of sliding sleeve lower extreme is equipped with the inner tube, inner tube upper end sliding seal installs in the sliding sleeve, the inner tube lower extreme outside is equipped with the outer loop platform, outer loop platform fixed mounting is on connecting the inner wall, the outer loop bench is equipped with a plurality of circulation channels that link up from top to bottom, be equipped with a plurality of inside and outside circulation holes that link up on the sliding sleeve lateral wall that corresponds the position between collar extension and the inner.
The following is further optimization or/and improvement of the technical scheme of the invention:
above-mentioned ball check valve can include basketball stands, guide arm, floater, reset spring and well logical ball seat, the ball seat spiro union is inside connecting the lower extreme, and there is the open lower extreme confined cylindric basketball stands in upper end inside the ball seat lower extreme is inside through threaded connection, and the guiding hole that link up about the bottom middle part of basketball stands is equipped with, wears to be equipped with the guide arm in the guiding hole, and the upper end fixed mounting of guide arm has the floater, and the through-hole inner wall of the ball seat that corresponds the floater position be with the sealed complex inner conical surface of floater sphere, corresponds on the guide arm between basketball stands inboard bottom and the floater the cover and is equipped with the reset spring that can be tight in inner conical surface with the sealed top of floater, and the.
Above-mentioned mounting ring bench can be equipped with two upper and lower sealed annular, all be equipped with in two sealed annular and be used for carrying out the sealing washer sealed to the clearance between mounting ring groove and the mounting ring platform, the mounting ring platform outside equipartition that corresponds the position between two sealed annular has three radial counter bore, install a locating piece in every radial counter bore, be equipped with compression spring between locating piece and the radial counter bore inner wall, the locating piece sticiss on the joint inner wall through compression spring, all be equipped with one on the inner wall of the mounting ring groove that corresponds every radial counter bore below position and be used for with locating piece complex location counter bore, the locating piece can insert in the location counter bore when the sliding sleeve is down to the circulation hole by the inner tube closed position.
At least one sealing ring can be fixedly arranged between the sliding sleeve and the inner cylinder.
The outside of the ball basket corresponding to the lower part of the ball seat can be provided with a sealing ring platform, and a sealing ring is fixedly arranged between the sealing ring platform and the inner wall of the joint.
The cross-section of the circulation channel may be fan-shaped.
The invention has reasonable and compact structure and convenient use, can cut off the shearing pin when the well cementation rubber plug presses the sliding sleeve downwards, and the rubber plug and the sliding sleeve move downwards, so that the circulating hole at the lower end of the sliding sleeve is sealed by the upper end of the inner cylinder, and the cement paste can be effectively prevented from returning into the pipe even if the floating ball fails in sealing, and the invention has the characteristics of simplicity, convenience, high efficiency and good sealing property.
Drawings
FIG. 1 is a schematic sectional view of the preferred embodiment of the present invention.
Fig. 2 is a schematic sectional structure view of the present invention in use.
The codes in the figures are respectively: the device comprises a connector 1, an inner barrel 2, an outer ring platform 3, a sliding sleeve 4, a shearing pin 5, an installation ring groove 6, a circulation hole 7, a circulation channel 8, a ball seat 9, a ball basket 10, a guide rod 11, a floating ball 12, a return spring 13, a sealing ring groove 14, a positioning block 15, a radial counter bore 16, a compression spring 17, a positioning counter bore 18, a sealing ring platform 19, a well cementation rubber plug 20, an installation ring platform 21 and a guide hole 22.
Detailed Description
The present invention is not limited by the following examples, and specific embodiments may be determined according to the technical solutions and practical situations of the present invention.
In the present invention, for convenience of description, the description of the relative positional relationship of the components is described according to the layout pattern of fig. 1 of the specification, such as: the positional relationship of front, rear, upper, lower, left, right, etc. is determined in accordance with the layout direction of the drawings of the specification.
The invention is further described with reference to the following examples and figures:
as shown in attached figures 1 and 2, the sliding sleeve type bumping seat comprises a joint 1, a floating ball check valve, an inner cylinder 2 and a sliding sleeve 4, a sliding sleeve 4 is arranged inside the upper end of the joint 1, an installation ring platform 21 is arranged outside the upper end of the sliding sleeve 4, the inner wall of the joint 1 corresponding to the position of the mounting ring platform 21 is provided with a mounting ring groove 6, the mounting ring platform 21 is arranged in the mounting ring groove 6 in a sliding and sealing way, the mounting ring platform 21 is fixed with the joint 1 through a shearing pin 5, an inner cylinder 2 is sleeved in the lower end of the sliding sleeve 4, the upper end of the inner cylinder 2 is arranged in the sliding sleeve 4 in a sliding and sealing way, an outer ring platform 3 is arranged on the outer side of the lower end of the inner cylinder 2, the outer ring platform 3 is fixedly arranged on the inner wall of the joint 1, a plurality of circulating channels 8 which are communicated up and down are arranged on the outer ring platform 3, a plurality of internally and externally communicated circulating holes 7 are arranged on the side wall of the inner cylinder 2 corresponding to the position between the mounting ring platform 21 and the inner cylinder 2, and a floating ball check valve is fixedly arranged on the inner wall of the joint 1 corresponding to the position below the inner cylinder 2. According to the requirement, the upper end and the lower end of the joint 1 are respectively provided with joint threads connected with a drilling casing, when the joint is used, the upper end and the lower end of the joint are respectively connected with an upper drilling casing and a lower drilling casing, cement slurry injected into the upper drilling casing passes through the sliding sleeve 4 and enters a circulating channel 8 on an outer ring platform 3 of the inner barrel 2 from a circulating hole 7 at the lower end of the sliding sleeve 4, and then enters the lower drilling casing through a floating ball check valve; when the pipe needs to be subjected to pressure building and setting waiting, the well cementation rubber plug 20 is put into the drilling casing pipe from the upper part, when the well cementation rubber plug 20 is put into contact with the sliding sleeve 4 and continues to press the sliding sleeve 4 downwards, the shearing pin 5 between the joint 1 and the sliding sleeve 4 is sheared, the sliding sleeve 4 moves downwards in the mounting ring groove 6, the upper end of the inner barrel 2 completely enters the inside of the sliding sleeve 4, and the circulating hole 7 at the lower end of the sliding sleeve 4 is sealed, if the floating ball check valve fails, the upward returning slurry enters from the circulating channel 8 on the outer ring platform 3 of the inner barrel 2 and is effectively blocked between the sliding sleeve 4 and the inner barrel 2 and cannot enter the drilling casing pipe from the upper part, and therefore the cement slurry can be prevented from being poured into the drilling casing pipe from the upper part to form a. The invention has reasonable and compact structure and convenient use, can cut the cutting pin 5 when the well cementation rubber plug 20 presses the sliding sleeve 4 downwards, and the rubber plug and the sliding sleeve 4 go downwards, so that the circulating hole 7 at the lower end of the sliding sleeve 4 is sealed by the upper end of the inner barrel 2, and the cement paste can be effectively prevented from returning into the pipe even if the floating ball 12 fails in sealing, and the invention has the characteristics of simplicity, convenience, high efficiency and good sealing property.
The sliding sleeve type impacting seat can be further optimized or/and improved according to actual requirements:
as shown in the attached drawings 1 and 2, the floating ball check valve comprises a ball basket 10, a guide rod 11, a floating ball 12, a reset spring 13 and a hollow ball seat 9, wherein the ball seat 9 is screwed inside the lower end of a connector 1, the lower end of the ball seat 9 is internally connected with a cylindrical ball basket 10 with an upper end open and a lower end closed through threads, a guide hole 22 which is communicated from top to bottom is formed in the middle of the bottom end of the ball basket 10, the guide rod 11 is arranged in the guide hole 22 in a penetrating mode, the floating ball 12 is fixedly installed at the upper end of the guide rod 11, the inner wall of a through hole of the ball seat 9 corresponding to the position of the floating ball 12 is an inner conical surface which is in sealed fit with the spherical surface of the floating ball 12, the reset spring 13 capable of tightly pushing the floating ball 12 against the inner conical surface is. During the cement injection, high-pressure fluid acts on the floating ball 12 after flowing through the through hole on the ball seat 9, the floating ball 12 pushes down the reset spring 13, the floating ball 12 and the guide rod 11 go down, the injection channel is opened, and the cement injection enters into the drilling sleeve below through the liquid outlet hole, so that the use requirement of well cementation is met.
As shown in fig. 1 and 2, the mounting ring platform 21 is provided with an upper sealing ring groove 14 and a lower sealing ring groove 14, each sealing ring groove 14 is internally provided with a sealing ring for sealing a gap between the mounting ring groove 6 and the mounting ring platform 21, three radial counter bores 16 are uniformly distributed on the outer side of the mounting ring platform 21 corresponding to a position between the two sealing ring grooves 14, each radial counter bore 16 is internally provided with a positioning block 15, a compression spring 17 is arranged between the positioning block 15 and the inner wall of each radial counter bore 16, the positioning block 15 is tightly pressed on the inner wall of the joint 1 through the compression spring 17, the inner wall of the mounting ring groove 6 corresponding to a position below each radial counter bore 16 is provided with a positioning counter bore 18 for matching with the positioning block 15, and the positioning block 15 can be inserted into the positioning counter bore 18 when the sliding sleeve 4 descends. The gap between the mounting ring groove 6 and the mounting ring platform 21 is sealed by arranging the sealing ring, so that the mechanical sealing property of the invention is enhanced; through setting up locating piece 15 on installation ring platform 21, set up location counter bore 18 on installation ring groove 6 inner wall for sliding sleeve 4 moves down to circulation hole 7 by inner tube 2 closed position, locating piece 15 wears to locate in radial counter bore 16 and the location counter bore 18, prevents that the grout pressure of going up the return is greater than the pressure that well cementation plug 20 acted on sliding sleeve 4, causes sliding sleeve 4 to move up the grout and gets into the drilling sleeve pipe in top.
As shown in fig. 1 and 2, at least one sealing ring is fixedly installed between the sliding sleeve 4 and the inner cylinder 2. The mechanical sealing performance of the invention is enhanced by arranging the sealing ring to seal the gap between the sliding sleeve 4 and the inner cylinder 2.
As shown in fig. 1 and 2, a sealing ring platform 19 is arranged on the outer side of the basketball goal 10 corresponding to the position below the ball seat 9, and a sealing ring is fixedly arranged between the sealing ring platform 19 and the inner wall of the joint 1. The mechanical sealing performance of the invention is enhanced by arranging the sealing ring to seal the gap between the sealing ring platform 19 and the inner wall of the joint 1.
The cross section of the circulation passage 8 is formed in a sector shape as required. The circulation channel 8 with the sector cross section can enable the cement slurry to flow more smoothly.
The above technical features constitute the best embodiment of the present invention, which has strong adaptability and best implementation effect, and unnecessary technical features can be increased or decreased according to actual needs to meet the requirements of different situations.
Claims (10)
1. The utility model provides a sliding sleeve formula is bumped and is pressed seat, its characterized in that includes and connects, ball check valve, inner tube and sliding sleeve, connect the inside sliding sleeve that is equipped with in upper end, the sliding sleeve upper end outside is equipped with the collar extension, be equipped with the collar extension on the joint inner wall that corresponds collar extension position, collar extension sliding seal installs in the collar extension, and the collar extension passes through the shearing pin and fixes together with the joint, the inside cover of sliding sleeve lower extreme is equipped with the inner tube, inner tube upper end sliding seal installs in the sliding sleeve, the inner tube lower extreme outside is equipped with the outer loop platform, outer loop platform fixed mounting is on connecting the inner wall, the outer loop bench is equipped with a plurality of circulation passageways that link up from top to bottom, be equipped with a plurality of inside and outside circulation holes that link up on the sliding sleeve lateral wall that corresponds the position between collar extension and the.
2. The sliding sleeve type impact seat according to claim 1, wherein the floating ball check valve comprises a ball basket, a guide rod, a floating ball, a return spring and a hollow ball seat, the ball seat is screwed inside the lower end of the joint, a cylindrical ball basket with an upper end open and a lower end closed is connected inside the lower end of the ball seat through threads, a guide hole which is communicated from top to bottom is formed in the middle of the bottom end of the ball basket, the guide rod penetrates through the guide hole, a floating ball is fixedly mounted at the upper end of the guide rod, the inner wall of a through hole of the ball seat corresponding to the position of the floating ball is an inner conical surface hermetically matched with the spherical surface of the floating ball, the return spring capable of tightly pushing the floating ball against the inner conical surface in a sealing manner is sleeved on the guide rod between the.
3. The sliding sleeve type bumping seat according to claim 1 or 2, characterized in that the mounting ring platform is provided with an upper sealing ring groove and a lower sealing ring groove, the two sealing ring grooves are respectively provided with a sealing ring for sealing a gap between the mounting ring groove and the mounting ring platform, three radial counter bores are uniformly distributed on the outer side of the mounting ring platform corresponding to the position between the two sealing ring grooves, each radial counter bore is internally provided with a positioning block, a compression spring is arranged between the positioning block and the inner wall of the radial counter bore, the positioning block is tightly pressed on the inner wall of the joint through the compression spring, the inner wall of the mounting ring groove corresponding to the position below each radial counter bore is provided with a positioning counter bore matched with the positioning block, and the positioning block can be inserted into the positioning counter bore when the sliding sleeve moves down to the.
4. The sliding sleeve type impact base according to claim 1 or 2, wherein at least one sealing ring is fixedly installed between the sliding sleeve and the inner cylinder.
5. The sliding sleeve type impact base according to claim 3, wherein at least one seal ring is fixedly installed between the sliding sleeve and the inner cylinder.
6. The sliding sleeve type impact base according to claim 1, 2 or 5, wherein a sealing ring is disposed at an outer side of the ball basket corresponding to a position below the ball seat, and a sealing ring is fixedly mounted between the sealing ring and an inner wall of the joint.
7. The sliding sleeve type impact base according to claim 3, wherein a sealing ring is disposed at an outer side of the ball basket corresponding to a position below the ball seat, and a sealing ring is fixedly mounted between the sealing ring and an inner wall of the joint.
8. The sliding sleeve impingement seat according to claim 1, 2, 5 or 7, wherein said recirculation passage has a fan-shaped cross-section.
9. The sliding sleeve impingement seat of claim 3, wherein said recirculation passage is fan-shaped in cross-section.
10. The sliding sleeve impingement seat of claim 4, wherein said recirculation passage is fan-shaped in cross-section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011425212.6A CN112253045A (en) | 2020-12-08 | 2020-12-08 | Sliding sleeve type impacting seat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011425212.6A CN112253045A (en) | 2020-12-08 | 2020-12-08 | Sliding sleeve type impacting seat |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112253045A true CN112253045A (en) | 2021-01-22 |
Family
ID=74224991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011425212.6A Pending CN112253045A (en) | 2020-12-08 | 2020-12-08 | Sliding sleeve type impacting seat |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112253045A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116006122A (en) * | 2023-03-27 | 2023-04-25 | 山东胜油固井工程技术有限公司 | Composite multifunctional casing floating collar device for well cementation and use method |
| CN120139712A (en) * | 2025-05-14 | 2025-06-13 | 中国石油大学(北京)克拉玛依校区 | Switch and fracturing device |
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|---|---|---|---|---|
| CN2426013Y (en) * | 2000-04-17 | 2001-04-04 | 大庆石油管理局钻井研究所 | Hydraulic controlled casing valve for well cementing |
| CN101949274A (en) * | 2010-08-27 | 2011-01-19 | 陈尚礼 | Casing shut-in valve for cementing operation |
| CN102606107A (en) * | 2011-01-21 | 2012-07-25 | 中国石油化工股份有限公司 | Halfway cementing well completion tube column and halfway cementing method |
| CN202946100U (en) * | 2012-12-07 | 2013-05-22 | 中国石油集团西部钻探工程有限公司 | Halfway well cementation self-grouting float collar |
| CN203214003U (en) * | 2013-01-21 | 2013-09-25 | 中国石油化工股份有限公司 | Float collar and pipe string using same |
| CN103573212A (en) * | 2013-10-28 | 2014-02-12 | 中国石油集团西部钻探工程有限公司 | Composite casing pipe split type rubber plug device well cementing |
| CN204024592U (en) * | 2014-09-05 | 2014-12-17 | 陕西延长石油(集团)有限责任公司研究院 | Bruising shut-in valve in down-hole for well cementation |
| CN204283321U (en) * | 2014-10-31 | 2015-04-22 | 中国石油化工集团公司 | Spring-go type casing float collar |
| CN204729052U (en) * | 2015-06-10 | 2015-10-28 | 新疆再兴科苑石油科技有限公司 | Self-locking well cementation seal rubber plug and bruising device |
| CN204827363U (en) * | 2015-07-08 | 2015-12-02 | 延长油田股份有限公司 | It closes closed float collar to bump to press |
| CN205135545U (en) * | 2015-11-13 | 2016-04-06 | 中国石油集团西部钻探工程有限公司 | Play column type auto -lock plug and play column type self -lock device |
| CN205577943U (en) * | 2016-04-25 | 2016-09-14 | 中国石油集团渤海钻探工程有限公司 | Well cementation valve is closed to plug that can irritate certainly |
| CN207229063U (en) * | 2017-08-20 | 2018-04-13 | 中国石油集团长城钻探工程有限公司 | A kind of bruising closing well formula casing float collar |
| CN210068071U (en) * | 2019-01-08 | 2020-02-14 | 青岛海蚨奥工贸有限公司 | Drillable grading hoop |
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2020
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| CN2426013Y (en) * | 2000-04-17 | 2001-04-04 | 大庆石油管理局钻井研究所 | Hydraulic controlled casing valve for well cementing |
| CN101949274A (en) * | 2010-08-27 | 2011-01-19 | 陈尚礼 | Casing shut-in valve for cementing operation |
| CN102606107A (en) * | 2011-01-21 | 2012-07-25 | 中国石油化工股份有限公司 | Halfway cementing well completion tube column and halfway cementing method |
| CN202946100U (en) * | 2012-12-07 | 2013-05-22 | 中国石油集团西部钻探工程有限公司 | Halfway well cementation self-grouting float collar |
| CN203214003U (en) * | 2013-01-21 | 2013-09-25 | 中国石油化工股份有限公司 | Float collar and pipe string using same |
| CN103573212A (en) * | 2013-10-28 | 2014-02-12 | 中国石油集团西部钻探工程有限公司 | Composite casing pipe split type rubber plug device well cementing |
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| CN205135545U (en) * | 2015-11-13 | 2016-04-06 | 中国石油集团西部钻探工程有限公司 | Play column type auto -lock plug and play column type self -lock device |
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| CN207229063U (en) * | 2017-08-20 | 2018-04-13 | 中国石油集团长城钻探工程有限公司 | A kind of bruising closing well formula casing float collar |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116006122A (en) * | 2023-03-27 | 2023-04-25 | 山东胜油固井工程技术有限公司 | Composite multifunctional casing floating collar device for well cementation and use method |
| CN120139712A (en) * | 2025-05-14 | 2025-06-13 | 中国石油大学(北京)克拉玛依校区 | Switch and fracturing device |
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Application publication date: 20210122 |
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| RJ01 | Rejection of invention patent application after publication |