CN112096339A - Automatic packing device for casing - Google Patents
Automatic packing device for casing Download PDFInfo
- Publication number
- CN112096339A CN112096339A CN201910527800.1A CN201910527800A CN112096339A CN 112096339 A CN112096339 A CN 112096339A CN 201910527800 A CN201910527800 A CN 201910527800A CN 112096339 A CN112096339 A CN 112096339A
- Authority
- CN
- China
- Prior art keywords
- sleeve
- wall
- annular groove
- automatic packing
- packing device
- 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.)
- Granted
Links
- 238000012856 packing Methods 0.000 title claims abstract description 73
- 239000012530 fluid Substances 0.000 claims abstract description 21
- 238000007790 scraping Methods 0.000 claims abstract description 17
- 238000002955 isolation Methods 0.000 claims abstract description 15
- 230000007246 mechanism Effects 0.000 claims abstract description 15
- 230000009471 action Effects 0.000 claims description 9
- 238000010008 shearing Methods 0.000 claims description 2
- 230000006835 compression Effects 0.000 claims 1
- 238000007906 compression Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 14
- 230000002093 peripheral effect Effects 0.000 abstract description 2
- 238000005192 partition Methods 0.000 abstract 1
- 239000004568 cement Substances 0.000 description 12
- 238000007789 sealing Methods 0.000 description 8
- 238000004140 cleaning Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000002708 enhancing effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000005381 potential energy Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000007596 consolidation process Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/127—Packers; Plugs with inflatable sleeve
- E21B33/1277—Packers; Plugs with inflatable sleeve characterised by the construction or fixation of the sleeve
-
- 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
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
- E21B37/02—Scrapers specially adapted therefor
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)
- Sealing Devices (AREA)
Abstract
The invention provides an automatic packing device for a casing, which comprises: the device comprises a body provided with a central flow passage, wherein the outer surface of the body is provided with an annular groove; the expansion sleeve is arranged in the annular groove, and a plurality of scraping blades which are uniformly distributed in the circumferential direction are arranged on the peripheral surface of the expansion sleeve; set up being used for in the annular groove to drive the wiper blade is in order to clear up the isolation mechanism of outer sheathed tube inner wall, and it includes the elastic component, sets gradually first sleeve and the second sleeve in the radial outside of elastic component, wherein, be equipped with a plurality of messenger on the body lateral wall fluid in the center flow way gets into the through-hole of annular groove, the inflation sleeve radially outwards expands under fluidic effect, just isolation mechanism constructs to drive the outer sheathed tube inner wall of wiper blade clearance, so that the inflation sleeve fully expands to contact with outer sheathed tube inner wall to accomplish and seal the partition.
Description
Technical Field
The invention belongs to the technical field of well cementation engineering, particularly relates to tail pipe well cementation construction operation, and particularly relates to an automatic packing device for a casing.
Background
In the process of oil exploitation, a plurality of layers of casings are generally put in and cemented in the well cementation operation, so as to achieve the purposes of supporting a well wall and sealing different strata. However, in a multi-layer sleeve, the diameter of the sleeve of the upper layer is larger than the diameter of the sleeve of the lower layer. Furthermore, the next casing is used as a liner, without the need to tie back to the wellhead, but instead is suspended from the lower end of the previous casing with a partial overlap. The overlap needs to be sealed by process techniques and the prior art typically uses cement seals, or additional running packers, to seal the overlap.
However, the partial overlapping is generally small in gap, cementing and packing are carried out by adopting cement injection, the problems of poor annular cement consolidation quality reliability, poor shaft integrity and the like exist, and the packing effect is poor. The liner hanger with the top packer is adopted for well cementation packing, so that a plurality of risks exist, such as setting in advance, incapability of setting and the like, the construction effect of well cementation operation is seriously influenced, and the well cementation construction efficiency is reduced.
At present, in the prior art, there are many packing devices for wellbore annulus, wherein, an equal-bore-diameter expansion casing and sealing rubber are adopted to pack the overlapped section of the casing, or a metal expansion sleeve and a rubber sleeve are adopted to pack the overlapped section of the casing. These packing devices usually pack by extruding an expansion sleeve or by a rubber body, some need to pack for many times, and have the disadvantages of poor packing efficiency, poor device integrity, low safety, or complex structure, high production and manufacturing cost, inconvenient operation of packing operation and poor control precision.
Disclosure of Invention
In view of the above technical problems, the present invention is directed to an automatic packer for casing, which can automatically pack after being lowered to a predetermined depth, thereby effectively avoiding setting ahead of time. Simultaneously, can clear up the cement of outer sheathed tube inner wall before sealing to the packing effect of automatic packing device has been guaranteed. In addition, the automatic packing device is simple to operate, high in packing efficiency and high in safety.
To this end, according to the present invention, there is provided an automatic packing device for casing, comprising: the fluid pump comprises a cylindrical body, a pump body and a pump body, wherein the body is provided with a central flow passage through which fluid flows, and the outer surface of the body is provided with an annular groove; the expansion sleeve is arranged in the annular groove and can expand along the radial direction, and a plurality of scraping blades which are uniformly distributed in the circumferential direction are arranged on the peripheral surface of the expansion sleeve; the isolation mechanism is arranged in the annular groove and used for driving the scraping blade to move along the axial direction of the body so as to clean the inner wall of the outer sleeve outside the body, and comprises an elastic part, a first sleeve and a second sleeve, wherein the first sleeve and the second sleeve are sequentially sleeved on the radial outer side of the elastic part; the body is provided with a plurality of through holes on the side wall corresponding to the annular groove, fluid from the central flow passage enters the annular groove through the through holes, the expansion sleeve is expanded to radially push the scraping blade to clamp the scraping blade with the second sleeve, and the isolation mechanism is constructed to enable the elastic piece to push the moving block to move and drive the scraping blade to clean the inner wall of the outer sleeve through the second sleeve, so that the expansion sleeve is completely expanded to contact with the inner wall of the outer sleeve, and then the packing is completed.
In a preferred embodiment, a first retaining ring fixedly connected with the body is arranged between the elastic member and the moving block, so that the elastic member is initially in a compressed state, and the first retaining ring can be dissolved under the action of fluid, so that the elastic member pushes the moving block to move.
In a preferred embodiment, a second retaining ring fixedly connected with the body is arranged between the elastic member and the expansion sleeve, and one end of the first sleeve is fixedly connected with the second retaining ring.
In a preferred embodiment, a plurality of sliding grooves which are uniformly distributed in the circumferential direction and extend along the axial portion are formed in the side wall of the second sleeve, and the moving block is mounted in the sliding grooves and can move along the sliding grooves.
In a preferred embodiment, the wiper blade comprises a first part in the shape of an arc-shaped sheet and a second part in the shape of a sector, the first part is perpendicularly connected with the second part, and the second part is used for cleaning the inner wall of the outer sleeve.
In a preferred embodiment, a protrusion is formed on the outer wall surface of the first portion, a clamping groove is formed in the inner wall of one end of the second sleeve, and the protrusion can be matched and clamped with the clamping groove, so that the second sleeve drives the scraping blade to clean the inner wall of the outer sleeve.
In a preferred embodiment, the second portion is secured to the body by a first pin, the wiper being movable radially outwardly by shearing the first pin under the action of expansion of the first sleeve.
In a preferred embodiment, a dissolvable inner sleeve is provided in the region of the inner wall of the body corresponding to the annular groove.
In a preferred embodiment, the inner sleeve is fixedly mounted to the inner wall of the body by a second pin.
In a preferred embodiment, a protective sleeve is mounted on the outside of the annular groove corresponding to the isolation mechanism.
Compared with the prior art, the invention has the advantages that:
the automatic packing device for the casing pipe can automatically pack after being lowered to a preset depth, and can clean cement on the inner wall of the outer casing pipe before packing, so that the inner wall of the outer sleeve pipe is clean, and the packing effect of the automatic packing device is greatly improved. In addition, this automatic packing device adopts the expansion sleeve to pack apart, has improved packing efficiency and packing effect greatly. And the controllability of packing is improved through the soluble inner skleeve and the first fender ring, makes it seal after reaching the preset position, has effectively avoided setting in advance. The automatic packing device is simple to operate, high in packing efficiency, safe, reliable and capable of obviously enhancing the packing effect.
Drawings
The invention will now be described with reference to the accompanying drawings.
Fig. 1 schematically shows a structure of an automatic packing apparatus for casing according to the present invention in an initial state.
Fig. 2 and 3 together show the structure of a wiper blade in the automatic packing apparatus for bushings shown in fig. 1.
Fig. 4 schematically shows a structure of an automatic packing apparatus for casing according to the present invention in a packing state.
In the present application, the drawings are all schematic and are used only for illustrating the principles of the invention and are not drawn to scale.
Detailed Description
The invention is described below with reference to the accompanying drawings.
In this application, the end of the automatic pack-off device for casing according to the invention lowered into the wellbore close to the wellhead is defined as the upper end or the like, and the end remote from the wellhead is defined as the lower end or the like.
Fig. 1 schematically shows the structure of an automatic packing apparatus 100 for casing according to the present invention. As shown in fig. 1, the automatic packing device 100 includes a cylindrical body 110. The body 110 is provided with a central flow passage 111, the central flow passage 111 being for fluid in the wellbore to flow therethrough. In one embodiment, the upper end of the body 110 is configured as a male connector 112 and the lower end of the body 110 is configured as a female connector 113. The body 110 is connected to other drilling tools by a pin connector 112 and a box connector 113, respectively.
In accordance with the present invention, a radially inwardly extending annular groove 114 is provided on the outer surface of the body 110. As shown in fig. 1, an expansion sleeve 120 is disposed within the annular recess 114. In one embodiment, the expansion sleeve 120 is made of a rubber material. An interference fit is provided between the expansion sleeve 120 and the body 110 to fixedly mount the expansion sleeve to the body 110 at a sidewall surface adjacent to the axially lower end of the annular recess 114. The expansion sleeve 120 is capable of expanding gradually under the influence of the well fluid and expanding radially outward. Meanwhile, a plurality of wipers 130 are disposed on the outer circumference of the expansion sleeve 120, and in one embodiment, the plurality of wipers 130 are uniformly arranged on the outer circumferential surface of the expansion sleeve 120 in the circumferential direction and are fixed on the side wall surfaces of the annular groove 114 by first pins, respectively. When the expansion sleeve 120 expands in the radial direction, the wiper 130 is pushed until the first pin is sheared so that the wiper 130 is extended in the radial direction, thereby cleaning the cement on the inner wall of the outer casing by the wiper 130.
Fig. 2 and 3 schematically show the structure of the wiper 130. As shown in fig. 2 and 3, the blade 130 includes a first portion 131 having an arc-shaped sheet shape and a second portion 132 perpendicularly connected to the first portion 131 and configured in a fan shape. In the present embodiment, a projection 133 extending radially outward is provided on the outer wall surface of the first portion 131 of the wiper 130. The function of the projection 133 will be described below. When installed, the second portion 132 is fixed to the upper end side wall surface of the annular groove 114 by a first pin, and the first portion 131 is located radially outside the expansion sleeve 120. As the well fluid expands the expansion sleeve 120, the expansion sleeve 120 continues to expand radially outward until the first pin is sheared, thereby pushing the wiper 130 radially outward, thereby causing the second portion 132 to extend radially to clear the inner wall of the outer casing of cement. The structure of the scraping blade 130 can effectively improve the cleaning efficiency and the cleaning effect of cement on the inner wall of the outer casing pipe, and further enhance the packing effect of the automatic packing device.
According to the present invention, an isolation mechanism is also provided within the annular groove 114. The isolation mechanism is used to drive the scraper 130 to move axially to clean the cement on the inner wall of the outer casing. As shown in fig. 1, the isolation mechanism includes an elastic member 140. In one embodiment, the elastic member 140 is a spring, and the spring is sleeved on the body 110. A first retainer ring 150 and a second retainer ring 160 are respectively connected to both ends of the elastic member 140, the first retainer ring 150 being dissolvable by the well fluid, and the second retainer ring 160 being disposed near the axial end of the expansion sleeve 120. In one embodiment, the first retainer 150 is secured to the body 110 by a pin and the second retainer 160 is secured to the body 110 by a screw. Thus, both ends of the elastic member 140 are fixed by the first and second catching rings 150 and 160, respectively. In the initial state, the elastic member 140 is in a compressed state, thereby storing elastic potential energy.
As shown in fig. 1, the isolation mechanism further includes a first sleeve 170 disposed radially outward of the elastic member 140. One end of the first sleeve 170 is fixedly connected to the second retainer 160. A sliding groove (not shown) extending along an axial portion is provided on a side wall of an end of the first sleeve 170 away from the first baffle ring 150. A moving block 172 is installed in the sliding groove, the first retainer ring 150 is located between the elastic member 140 and the moving block 172, and the moving block 172 can move axially along the sliding groove. In the initial state, the moving block 172 is at one end of the sliding chute and is close to the first retainer ring 150. When the well fluid dissolves the first retainer ring 150, the elastic member 140 pushes the traveling block 172 to move in the sliding groove under the action of elastic potential energy.
According to the present invention, a second sleeve 180 is provided outside the first sleeve 170. As shown in fig. 1, one end of the second sleeve 180 is fixedly connected to the moving block 172. A radially outwardly concave locking groove 181 is formed on the inner wall of the other end of the second sleeve 180. The catch 181 is adapted to engage with the protrusion 133 on the first portion 131 of the blade 130. In the initial state, the second sleeve 180 is located radially outside the wiper 130 and the first sleeve 170. When the expansion sleeve 120 pushes the scraping blade 130 to extend radially, the protrusion 131 is clamped into the clamping groove 181 to form a clamping connection, and then under the action of the elastic member 140, the moving block 172 moves in the sliding groove, and the second sleeve 180 drives the scraping blade 130 to move, so that the scraping blade 130 cleans cement on the inner wall of the outer sleeve. And the expansion sleeve 120 continues to expand under the action of the well fluid until it is fully in contact with the inner wall of the outer casing, eventually completing the annulus packing.
According to the present invention, a plurality of through holes 118 are respectively formed at the sidewall regions of the body 110 where the expansion sleeve 120 and the first stopper ring 150 are correspondingly installed. Well fluid enters the annular groove 114 through the through-hole 118, thereby gradually expanding the expansion sleeve 120 and, at the same time, gradually dissolving the first retainer 150. Therefore, the cement on the inner wall of the outer layer sleeve can be cleaned firstly, the inner wall is sealed and isolated cleanly, the sealing performance of annular sealing is guaranteed by sealing and isolating the inner wall through the expansion sleeve 120, and the sealing and isolating effect and the sealing and isolating efficiency are greatly improved.
In the present embodiment, an inner sleeve 115 is provided in an inner wall region of the body 110 corresponding to the annular groove 114. In one embodiment, the inner sleeve 115 is fixedly mounted to the inner wall of the body 110 by a second pin. The inner sleeve 115 can gradually dissolve under the influence of the wellbore fluid and then fall out of the body 110. The inner sleeve 115 can prevent wellbore fluid from entering the annular groove 114 in advance, so that the automatic packing device 100 is controlled to pack at a preset position, and early packing can be effectively avoided, so that the packing effectiveness of the automatic packing device 100 is improved.
In addition, a protective sleeve 116 is provided on the outer wall of the body 110 to protect the isolation mechanism. As shown in fig. 1, a protection sleeve 116 is fixed on the outer surface of the body 110 and corresponds to the isolation mechanism. The protection sleeve 116 can effectively protect the isolation mechanism, thereby ensuring the packing effect of the automatic packing apparatus 100.
The operation of the automatic packing apparatus 100 for casing according to the present invention is briefly described as follows. FIG. 1 shows the configuration of the automatic packing apparatus 100 in an initial state. As shown in FIG. 1, in an initial state, the inner sleeve 115 is fixed to the inner wall of the body 110, closing the through-holes 118 of the inner wall and the upper wall of the body 110. The expansion sleeve 120 is in a contracted state and the blade 130 is fixed to the body 110. And, the first stopper ring 150 compresses the elastic member 140 and is fixed to the body 110. Meanwhile, the moving block 172 is located at one end of the sliding groove close to the first retainer ring 150, so that the locking groove 181 of the second sleeve 180 is located radially outside the protrusion 133 of the wiper 130. During construction, the automatic packing apparatus 100 is connected to the liner string via the pin connector 112 and the box connector 113 and lowered into the wellbore. After completion of the cementing operation, the fluid in the wellbore gradually dissolves the inner sleeve 115 until the inner sleeve 115 is completely dissolved. Thus, fluid in the central flow passage 111 enters the annular groove 114 through the through hole 118, and the expansion sleeve 120 gradually expands under the action of the fluid until the first pin fixing the wiper 130 is sheared off, thereby pushing the wiper 130 radially outward until the protrusion 133 on the wiper 130 is caught in the catching groove 181 of the second sleeve 180. Meanwhile, the first retainer ring 150 is gradually dissolved under the action of the fluid, so that the elastic member 140 acts on the moving block 172 to push the moving block 172 to move along the sliding groove, and the second sleeve 180 drives the scraper 130 to clean the inner wall of the outer sleeve. Until the expansion sleeve 120 is fully expanded and then contacts with the inner wall of the outer sleeve, and finally annular packing is realized. FIG. 4 shows the configuration of the automatic packing apparatus 100 in a final packing state.
The automatic packing device 100 for the casing pipe can automatically pack after being lowered to a preset depth, and can clean cement on the inner wall of the outer casing pipe before packing, so that the inner wall of the outer sleeve pipe is clean, and the packing effect of the automatic packing device is greatly improved. In addition, this automatic packing device adopts the expansion sleeve to pack apart, has improved packing efficiency and packing effect greatly. In addition, the controllability of packing is improved through the soluble inner sleeve 115 and the first baffle ring 150, so that the packing is carried out after the packing reaches a preset position, and the advance setting is effectively avoided. The automatic packing device is simple to operate, high in packing efficiency, safe, reliable and capable of obviously enhancing the packing effect.
Finally, it should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and do not limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing examples, or that equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An automatic packing apparatus for casing, comprising:
a cylindrical body (110) provided with a central flow channel (111) through which a fluid flows, an annular groove (114) being provided on an outer surface of the body;
the expansion sleeve (120) is arranged in the annular groove and can expand along the radial direction, and a plurality of scraping blades (130) which are uniformly distributed in the circumferential direction are arranged on the outer circumferential surface of the expansion sleeve;
the isolation mechanism is arranged in the annular groove and used for driving the scraping blade to move along the axial direction of the body so as to clean the inner wall of an outer layer sleeve (200) outside the body, and comprises an elastic part (140), a first sleeve (170) and a second sleeve (180) which are sequentially sleeved on the radial outer side of the elastic part, the first sleeve is provided with a moving block (172) capable of moving along the axial direction, the elastic part is arranged between the expansion sleeve and the moving block in the axial direction and is initially in a compression state, one end of the second sleeve is fixedly connected with the moving block, and the other end of the second sleeve is constructed to be capable of being clamped with the scraping blade;
the body is provided with a plurality of through holes (118) on the side wall corresponding to the annular groove, fluid from the central flow passage enters the annular groove through the through holes, the expansion sleeve expands to radially push the scraping blade to clamp the scraping blade with the second sleeve, and the isolation mechanism is constructed to enable the elastic piece to push the moving block to move and drive the scraping blade to clean the inner wall of the outer sleeve through the second sleeve, so that the expansion sleeve completely expands to contact with the inner wall of the outer sleeve, thereby completing packing.
2. The automatic packing device of claim 1, wherein a first stop ring (150) is fixedly connected to the body between the resilient member and the moving block so that the resilient member is initially in a compressed state, the first stop ring being capable of dissolving under the action of a fluid so that the resilient member urges the moving block to move.
3. The automatic packing device of claim 1 or 2, wherein a second retainer ring (160) is fixedly connected to the body between the resilient member and the expansion sleeve, and wherein one end of the first sleeve is fixedly connected to the second retainer ring.
4. The automatic packing device of claim 1, wherein a plurality of sliding grooves are uniformly distributed in the circumferential direction and extend along the axial portion on the side wall of the second sleeve, and the moving block is mounted in the sliding grooves and can move along the sliding grooves.
5. The automatic packing device according to claim 4, characterized in that said wiper comprises a first sector (131) in the form of an arc-shaped blade and a second sector (132) in the form of a sector, said first sector being perpendicularly connected to said second sector and said second sector being adapted to clean the inner wall of said outer casing.
6. The automatic packing device of claim 5, wherein a protrusion (133) is provided on an outer wall surface of the first portion, and a locking groove (181) is provided on an inner wall of one end of the second sleeve, the protrusion being adapted to engage with the locking groove, so that the second sleeve drives the scraper to clean the inner wall of the outer sleeve.
7. The automatic packing device of claim 5 or 6, wherein said second portion is secured to said body by a first pin, said wiper being movable radially outwardly by shearing said first pin under the action of expansion of said first sleeve.
8. The automatic packing device of claim 1, characterized in that a dissolvable inner sleeve (115) is provided in the inner wall area of the body corresponding to the annular groove.
9. The automatic packing device of claim 8, wherein the inner sleeve is fixedly mounted to the inner wall of the body by a second pin.
10. The automatic packing device of claim 1, characterized in that a protection sleeve (116) is mounted outside the annular groove corresponding to the isolation mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910527800.1A CN112096339B (en) | 2019-06-18 | 2019-06-18 | Automatic packing device for casing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910527800.1A CN112096339B (en) | 2019-06-18 | 2019-06-18 | Automatic packing device for casing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112096339A true CN112096339A (en) | 2020-12-18 |
| CN112096339B CN112096339B (en) | 2022-02-18 |
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ID=73748349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910527800.1A Active CN112096339B (en) | 2019-06-18 | 2019-06-18 | Automatic packing device for casing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112096339B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113153214A (en) * | 2021-03-24 | 2021-07-23 | 大庆市天德忠石油科技有限公司 | Sealing structure for soluble bridge plug |
| CN114961641A (en) * | 2022-05-12 | 2022-08-30 | 阜新市石油工具厂 | Soluble bridge plug with high dissolving speed |
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| CN2761830Y (en) * | 2005-01-10 | 2006-03-01 | 辽河石油勘探局 | Outside pipe liquid expansion packer |
| CN2931775Y (en) * | 2006-05-12 | 2007-08-08 | 中国海洋石油总公司 | Highly effective pipeline scraper |
| CN101509361A (en) * | 2008-02-13 | 2009-08-19 | 刘景斌 | Remediable scale scraping packer |
| CN202325323U (en) * | 2011-11-22 | 2012-07-11 | 刘传礼 | underground operation tool integrated with sand washing, paraffin scraping, sealing and separating |
| CN104763367A (en) * | 2015-03-24 | 2015-07-08 | 中国石油天然气股份有限公司 | Pigging and pipe scraping integrated tool |
| CN204532213U (en) * | 2015-02-28 | 2015-08-05 | 克拉玛依市建业有限责任公司 | A kind of well head frizing self-sealing head device of improvement |
| US9752403B1 (en) * | 2013-12-18 | 2017-09-05 | Robert J. Frey | Well remediation method and apparatus |
| CN206753533U (en) * | 2017-04-27 | 2017-12-15 | 江楠 | Split type front suspension device |
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2019
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2761830Y (en) * | 2005-01-10 | 2006-03-01 | 辽河石油勘探局 | Outside pipe liquid expansion packer |
| CN2931775Y (en) * | 2006-05-12 | 2007-08-08 | 中国海洋石油总公司 | Highly effective pipeline scraper |
| CN101509361A (en) * | 2008-02-13 | 2009-08-19 | 刘景斌 | Remediable scale scraping packer |
| CN202325323U (en) * | 2011-11-22 | 2012-07-11 | 刘传礼 | underground operation tool integrated with sand washing, paraffin scraping, sealing and separating |
| US9752403B1 (en) * | 2013-12-18 | 2017-09-05 | Robert J. Frey | Well remediation method and apparatus |
| CN204532213U (en) * | 2015-02-28 | 2015-08-05 | 克拉玛依市建业有限责任公司 | A kind of well head frizing self-sealing head device of improvement |
| CN104763367A (en) * | 2015-03-24 | 2015-07-08 | 中国石油天然气股份有限公司 | Pigging and pipe scraping integrated tool |
| CN206753533U (en) * | 2017-04-27 | 2017-12-15 | 江楠 | Split type front suspension device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113153214A (en) * | 2021-03-24 | 2021-07-23 | 大庆市天德忠石油科技有限公司 | Sealing structure for soluble bridge plug |
| CN113153214B (en) * | 2021-03-24 | 2022-03-29 | 大庆市天德忠石油科技有限公司 | Sealing structure for soluble bridge plug |
| CN114961641A (en) * | 2022-05-12 | 2022-08-30 | 阜新市石油工具厂 | Soluble bridge plug with high dissolving speed |
| CN114961641B (en) * | 2022-05-12 | 2024-02-09 | 阜新市石油工具厂 | Soluble bridge plug with high dissolution speed |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112096339B (en) | 2022-02-18 |
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