CN113338850A - Step-by-step setting soluble bridge plug - Google Patents
Step-by-step setting soluble bridge plug Download PDFInfo
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- CN113338850A CN113338850A CN202110727135.8A CN202110727135A CN113338850A CN 113338850 A CN113338850 A CN 113338850A CN 202110727135 A CN202110727135 A CN 202110727135A CN 113338850 A CN113338850 A CN 113338850A
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- cone
- rubber
- slips
- setting
- outer side
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 30
- 239000010959 steel Substances 0.000 claims abstract description 30
- 125000006850 spacer group Chemical group 0.000 claims abstract description 8
- 238000012856 packing Methods 0.000 claims abstract description 5
- 238000007789 sealing Methods 0.000 claims description 24
- 239000010720 hydraulic oil Substances 0.000 claims description 9
- 230000009471 action Effects 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 4
- 239000010687 lubricating oil Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 description 6
- 230000008093 supporting effect Effects 0.000 description 6
- 238000009434 installation Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000003292 glue Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
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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
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
- E21B33/134—Bridging plugs
-
- 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
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/10—Slips; Spiders ; Catching devices
-
- 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
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
- E21B23/01—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells for anchoring the tools or the like
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (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)
- Mechanical Engineering (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The utility model provides a soluble bridge plug is sat to step, relates to downhole tool technical field, including top connection, setting piston, center tube, packing element, last cone, lower cone and slips, its characterized in that: the upper joint is connected to the upper end of the central tube through threads, the upper cone and the lower cone are sleeved on the outer side of the central tube, the upper cone is fixed to the upper portion of the central tube through a setting pin, the lower cone is fixed to the lower portion of the central tube through a deblocking pin, the slips are arranged on the outer side of the central tube, the axial position of the slips is located between the upper cone and the lower cone, and ratchets are machined on the outer side of the slips; the rubber cylinders are three and are respectively called as an upper rubber cylinder, a middle rubber cylinder and a lower rubber cylinder, the three rubber cylinders are sleeved on the outer side of the upper cone, and a steel spacer ring A and a steel spacer ring B are respectively arranged between every two adjacent rubber cylinders. After the slips are sealed, the main body part of the lower rubber cylinder can be effectively supported by limiting the shifting position of the thin-wall section, so that the integral bearing capacity of each rubber cylinder is improved.
Description
Technical Field
The invention belongs to the technical field of downhole tools, and particularly relates to a step-by-step setting soluble bridge plug.
Background
The bridge plug is an underground tool applied to the underground of an oil well and playing a role in plugging, when the bridge plug is used, the bridge plug is placed into an underground casing, then the rubber cylinder is compressed on the ground by a certain means, the diameter of the rubber cylinder is increased, and finally, the outer surface of the rubber cylinder is attached to the inner wall of the casing, so that the casing is plugged. Meanwhile, in order to prevent the bridge plug from moving along the casing after bearing pressure, an anchoring mechanism capable of fixing the bridge plug on the inner wall of the casing needs to be arranged on the bridge plug.
In the prior art, a rubber cylinder of a bridge plug has the same structure as that of a rubber cylinder on a traditional packer, the pressure-bearing capacity after plugging is poor, and the requirement of a new technology and a new process on the pressure-bearing capacity of the bridge plug is difficult to meet, so that improvement is needed.
Disclosure of Invention
In order to solve the technical problems in the background art, the invention provides a step-by-step setting soluble bridge plug.
The technical problem solved by the invention is realized by adopting the following technical scheme: the invention provides a step-by-step setting soluble bridge plug which comprises an upper joint, a setting piston, a central tube, a rubber cylinder, an upper cone, a lower cone and a slip, wherein the upper joint is connected to the upper end of the central tube through threads;
the three rubber cylinders are respectively called as an upper rubber cylinder, a middle rubber cylinder and a lower rubber cylinder, the three rubber cylinders are sleeved on the outer side of the upper cone, and a steel spacer ring A and a steel spacer ring B are respectively arranged between every two adjacent rubber cylinders;
the inner side of the upper cone is in sliding and sealing fit with the central pipe, the upper end of the upper cone is inserted between the central pipe and the upper joint, the outer surface of the upper cone is in sliding and sealing fit with the inner surface of the upper joint, and the upper part of the central pipe and the upper end of the upper cone are correspondingly provided with liquid passing holes;
the setting piston is sleeved on the outer side of the upper cone and is in sliding sealing fit with the outer surface of the upper cone, the upper end of the setting piston is sleeved on the outer side of the lower end of the upper joint and is in sliding sealing fit with the upper joint, a spring is arranged between the upper side of the setting piston and the upper joint, the setting piston always keeps a movement trend away from the upper joint under the elastic force action of the spring, and a push ring is arranged between the lower end of the setting piston and the upper rubber barrel;
an annular groove is formed in the outer side of the upper connector, a C-shaped clamp spring is installed in the annular groove, and one-way backstop threads matched with each other are respectively formed in the outer side of the C-shaped clamp spring and the inner side of the setting piston;
the lower rubber cylinder is provided with a thin-wall section, the thin-wall section extends downwards to the outer side of the slips, and the thin-wall section is provided with a window for the slips to extend out;
the slip comprises four slips, four arc plates are arranged corresponding to the four slips and are respectively arranged between two adjacent slips, and the arc plates are provided with an inner arc surface and an outer arc surface which are called an inner arc surface and an outer arc surface, wherein the diameter of the outer arc surface is equal to the difference value between the inner diameter of the sleeve and the wall thickness of the thin-wall section;
and the inner side of the arc-shaped plate is fixedly provided with a sliding rod, and the sliding rod is inserted on the central pipe in a sliding manner and can slide along the radial direction of the central pipe.
Preferably, a skeleton ring is arranged on the inner side of the lower rubber cylinder.
Preferably, the skeleton ring is a solid ring made of rubber, and the hardness of the skeleton ring is greater than that of the lower rubber barrel.
Preferably, the skeleton ring comprises a hollow sac-shaped structure made of rubber, and hydraulic oil is filled in the hollow sac-shaped structure.
Preferably, the skeleton ring comprises a hollow sac-shaped structure made of rubber, and steel balls are filled in the hollow sac-shaped structure.
Preferably, gaps among the steel balls are filled with rubber.
Preferably, the gaps between the steel balls are filled with hydraulic oil.
Preferably, the skeleton ring comprises a hollow sac-shaped structure made of rubber, an inner rubber ring is arranged in the hollow sac-shaped structure, a steel wire is spirally wound on the outer side of the inner rubber ring, and lubricating oil is coated on the surface of the steel wire.
Preferably, the slips are provided with bosses, and the ratchets are arranged at the tops of the bosses.
Preferably, a necking section is arranged on the thin-wall section corresponding to the position of the slip, and the slip is installed between the upper cone and the lower cone under the constraint of the necking section.
The invention has the beneficial effects that:
1. the invention extends a thin-wall section from the lower end of the lower rubber cylinder, and an arc-shaped plate is arranged between two adjacent slips. After the slips are seated, the thin-wall section, the slips and the arc-shaped plate interact with each other in two aspects, on one hand, the arc-shaped plate is propped up and presses the thin-wall section on the inner wall of the sleeve, and on the other hand, the seated slips are embedded into a window on the thin-wall section and are blocked at the inner edge of the window. The interaction of the two aspects can limit the shifting position of the thin-wall section, and the main body part of the lower rubber cylinder can be effectively supported by limiting the shifting position of the thin-wall section, so that the integral pressure-bearing capacity of each rubber cylinder is improved.
2. According to the invention, the slips are arranged around the central pipe through the constraint effect of the necking section, so that the slip is a brand-new installation mode which does not exist in the prior art, and compared with the prior art, the installation mode has the characteristics of simple structure and quick assembly, and meanwhile, the radial movement range of the slips is greatly expanded.
3. The invention adopts a step-by-step setting mode, the slips are set firstly and the rubber cylinder is set secondly during setting, compared with the prior art, the step-by-step setting mode ensures that the setting processes of the slips and the rubber cylinder are not interfered with each other, thereby ensuring the setting quality to the maximum extent. Meanwhile, after the rubber cylinder is seated, the upper cone body is continuously pushed and strong setting force is applied to the slips, so that the setting quality of the slips is guaranteed, the linkage of setting actions of the rubber cylinder and the slips can be realized, and the rubber cylinder and the slips are further guaranteed to be in place.
4. In the prior art, the main function of the middle rubber cylinder is sealing, so the hardness of the used rubber is lower, and the function of the lower rubber cylinder is mainly to provide support for the middle rubber cylinder instead of sealing, so the hardness of the used rubber material is higher. The framework rings are arranged in the lower rubber cylinder, and after the lower rubber cylinder is compressed, the framework rings bulge outwards, so that the lower rubber cylinder is strongly supported from the inner side, and after the supporting function is ensured, the lower rubber cylinder can be woven by rubber materials with lower hardness, so that the integral pressure-bearing capacity and sealing performance of the rubber cylinder are further improved.
5. After the sealing is carried out, the space enclosed by two adjacent slips, the arc-shaped plate and the sleeve is filled by the rubber material between two adjacent windows on the thin-wall section, so that the slips can be effectively prevented from moving in a string manner, the stability of the slips sealing is greatly improved, and the sealing performance of the rubber cylinder can be further improved.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a cross-sectional view at A in FIG. 1;
FIG. 3 is a schematic structural view of a second embodiment of a lower glue cartridge;
FIG. 4 is a schematic structural view of a third embodiment of a lower packing element;
FIG. 5 is a schematic structural view of a fourth embodiment of a lower glue cartridge;
FIG. 6 is a state diagram after the slips are set.
In the figure: 1. the hydraulic oil sealing device comprises an upper connector, 2, a setting piston, 3, a liquid passing hole, 4, a sealing ring, 5, a spring, 6, an upper cone, 7, a central pipe, 8, an upper rubber cylinder, 9, a middle rubber cylinder, 10, a lower rubber cylinder, 11, a skeleton ring, 12, a slip, 13, a window, 14, a lower cone, 15, an arc-shaped plate, 16, a ratchet, 17, a boss, 18, a push ring, 19 and a C-shaped snap spring, 20, a one-way retaining thread, 21, a hollow saccular structure, 22, hydraulic oil, 23, a steel ball, 24 and an inner rubber ring; 25. a steel wire.
Detailed Description
The invention will be further described with reference to the accompanying drawings, in which the solid filling portions are all O-rings 4.
As shown in fig. 1, the present invention comprises an upper sub 1, a setting piston 2, a center tube 7, a packing element, an upper cone 6, a lower cone 14, and slips 12. The above is a common structure in the prior art, and is not described herein again.
As shown in fig. 1, the upper joint 1 is connected to the upper end of a central tube 7 through threads, an upper cone 6 and a lower cone 14 are both sleeved on the outer side of the central tube 7, the upper cone 6 is fixed on the upper portion of the central tube 7 through a setting pin, the lower cone 14 is fixed on the lower portion of the central tube 7 through a deblocking pin, a slip 12 is arranged on the outer side of the central tube 7, the axial position of the slip is located between the upper cone 6 and the lower cone 14, and ratchets 16 are machined on the outer side of the slip 12; the three rubber cylinders are respectively called an upper rubber cylinder 8, a middle rubber cylinder 9 and a lower rubber cylinder 10, the three rubber cylinders are sleeved on the outer side of the upper cone 6, and a steel spacer ring A and a steel spacer ring B are respectively arranged between every two adjacent rubber cylinders; the inner side of the upper cone 6 is in sliding sealing fit with the central pipe 7, the upper end of the upper cone 6 is inserted between the central pipe 7 and the upper joint 1, the outer surface of the upper cone 6 is in sliding sealing fit with the inner surface of the upper joint 1, and the upper part of the central pipe 7 and the upper end of the upper cone 6 are correspondingly provided with the liquid passing hole 3; the setting piston 2 is sleeved on the outer side of the upper cone 6 and is in sliding sealing fit with the outer surface of the upper cone 6, the upper end of the setting piston 2 is sleeved on the outer side of the lower end of the upper joint 1 and is in sliding sealing fit with the upper joint 1, a spring 5 is arranged between the upper side of the setting piston 2 and the upper joint 1, the setting piston 2 always keeps a movement trend away from the upper joint 1 under the elastic force action of the spring 5, and a push ring 18 is arranged between the lower end of the setting piston 2 and the upper rubber cylinder 8; the invention adopts a step-by-step setting mode, when setting, the slips 12 are set firstly, and the rubber cylinder is set secondly. Meanwhile, after the rubber cylinder is set, the upper cone 6 is continuously pushed and strong setting force is applied to the slips 12, so that the setting quality of the slips 12 is guaranteed, the linkage of setting actions of the rubber cylinder and the slips 12 can be realized, and the rubber cylinder and the slips 12 can be further set in place.
As shown in fig. 1, an annular groove is formed in the outer side of the upper joint 1, a C-shaped snap spring 19 is installed in the annular groove, and one-way retaining threads 20 which are matched with each other are respectively formed in the outer side of the C-shaped snap spring 19 and the inner side of the setting piston 2. The one-way retaining thread 20 is a common structure in downhole tools and functions to allow the setting piston 2 to slide only in one direction, but not to be withdrawn. Since they are of common structure, they are not described in detail herein.
As shown in fig. 1, a thin-wall section is arranged on the lower packing element 10, the thin-wall section extends downwards to the outer side of the slips 12, and a window 13 for the slips 12 to extend out is arranged on the thin-wall section; as shown in fig. 2, the slips 12 have four pieces, four arc plates 15 are provided corresponding to the four slips 12, and the four arc plates 15 are respectively provided between two adjacent slips 12. The present invention extends a thin wall section from the lower end of the lower glue barrel 10 and provides an arcuate plate 15 between adjacent slips 12. After the slips 12 are set, the thin-wall section, the slips 12 and the arc-shaped plate 15 interact with each other in two aspects, on one hand, the arc-shaped plate 15 supports and presses the thin-wall section on the inner wall of the casing, and on the other hand, the set slips 12 are embedded into the window 13 on the thin-wall section and are blocked in the window 13. The interaction of the two aspects can limit the shifting position of the thin-wall section, and the main body part of the lower rubber cylinder 10 can be effectively supported by limiting the shifting position of the thin-wall section, so that the integral pressure-bearing capacity of each rubber cylinder is improved.
As shown in fig. 2, the arc plate 15 is provided with inner and outer arc surfaces, which are called inner arc surface and outer arc surface, wherein the diameter of the outer arc surface is equal to the difference between the inner diameter of the casing and the wall thickness of the thin-walled segment. As shown in fig. 6, after setting, the rubber material between two adjacent windows 13 on the thin-wall section fills the space surrounded by two adjacent slips 12, the arc-shaped plate 15 and the sleeve, which not only can effectively prevent the slips 12 from moving, greatly improves the setting stability of the slips 12, but also can further improve the sealing performance of the rubber sleeve.
As shown in fig. 2, slide rods are fixedly mounted on the inner side of the arc-shaped plate 15, and the slide rods are slidably inserted on the central tube 7 and can slide along the radial direction of the central tube 7. The arrangement of the slide bar is beneficial to ensuring the stability of the arc-shaped plate 15 in the process of sliding along the radial direction.
The setting process of the invention is as follows:
when setting, the central tube 7 is pressurized, the pressure reaches the upper part of the upper cone 6 through the liquid passing hole 3 and cuts off a setting pin, then the upper cone 6 is pushed to approach the lower cone 14, then the slip 12 is pushed to move in the direction far away from the central tube 7, after the slip 12 finishes over 90 percent of travel, the seal between the upper cone 6 and the upper joint 1 (namely the position of the seal ring 44 marked in figure 1) fails, so that the pressure can reach the upper side of the setting piston 2, and meanwhile, the upper end of the upper cone 6 continues to bear pressure. After that, the setting piston 2 is pushed by pressure to compress the rubber cylinder downwards, so that the diameter of the rubber cylinder is increased, and the setting of the rubber cylinder is realized.
As shown in fig. 1, a skeleton ring 11 is preferably disposed inside the lower rubber tube 10. The skeleton ring 11 is a solid ring made of rubber, and the hardness of the skeleton ring 11 is greater than that of the lower rubber tube 10. In the prior art, the main function of the middle rubber cylinder 9 is sealing, so the hardness of the used rubber is low, and the function of the lower rubber cylinder 10 is mainly to provide support for the middle rubber cylinder 9 instead of sealing, so the hardness of the used rubber material is high. In the invention, the skeleton ring 11 is arranged in the lower rubber cylinder 10, and after the lower rubber cylinder 10 is compressed, the skeleton ring 11 bulges outwards, so that the lower rubber cylinder 10 is strongly supported from the inner side, and after the supporting function is ensured, the lower rubber cylinder 10 can be woven by rubber materials with lower hardness, so that the pressure-bearing capacity and the sealing performance of the whole rubber cylinder are further improved.
It should be noted that the skeleton ring 11 is not installed inside the lower rubber tube 10, but inside, so that the upper and lower sides of the skeleton ring 11 are not pulled by the lower rubber tube 10, and when the skeleton ring 11 deforms, the skeleton ring is bent and then bulges outwards, instead of being extruded and then bulges outwards, and different bulging modes lead to different stress concentration conditions on the bulging surface, thereby leading to completely different supporting effects.
As shown in fig. 3, the skeleton ring 11 preferably includes a hollow sac-like structure 21 made of rubber, and the hollow sac-like structure 21 is filled with hydraulic oil 22. In this structure, the hydraulic oil 22 makes it easier for the hollow sac-like structure 21 made of high hardness rubber to be compressed and deformed, but at the same time, ensures the supporting performance after deformation.
As shown in fig. 4, the skeleton ring 11 preferably includes a hollow sac-like structure 21 made of rubber, and the hollow sac-like structure 21 is filled with steel balls 23. The steel ball 23 filling structure has certain fluidity when the pressure bearing of the skeleton ring 11 is small, and when the pressure bearing of the skeleton ring 11 is large, the relative positions of the steel balls 23 are fixed and cannot flow, so that the supporting effect of the skeleton ring 11 is greatly improved. The gaps between the steel balls 23 are filled with rubber or hydraulic oil 22.
As shown in fig. 5, the skeleton ring 11 preferably includes a hollow bladder-like structure 21 made of rubber, an inner rubber ring 24 is disposed in the hollow bladder-like structure 21, a steel wire 25 is spirally wound on an outer side of the inner rubber ring 24, and a surface of the steel wire 25 is coated with a lubricating oil. After the framework rings 11 are pressed, the inner rubber rings 24 are bulged upwards and support the steel wires 25 from the inner side, and very reliable support is realized through the hardness of the steel wires 25. Meanwhile, compared with the steel balls 23, the steel wire 25 has the characteristic of continuity, and the supporting force on the lower rubber cylinder 10 is more uniform.
As shown in FIG. 2, the slips 12 are provided with a boss 17, and the ratchet 16 is provided on the top of the boss 17.
As shown in fig. 1, preferably, a necking section is provided on the thin-wall section corresponding to the position of the slips 12, and the slips 12 are installed between the upper cone 6 and the lower cone 14 under the constraint of the necking section. In the invention, the slips 12 are arranged around the central pipe 7 through the constraint action of the necking section, which is a brand new installation mode that does not exist in the prior art, compared with the prior art, the installation mode has the characteristics of simple structure and quick assembly, and simultaneously, the radial movement range of the slips 12 is greatly enlarged.
Claims (10)
1. The utility model provides a step by step seat seals soluble bridging plug, includes top connection (1), seals piston (2), center tube (7), packing element, upward cone (6), lower cone (14) and slips (12), its characterized in that: the upper joint (1) is connected to the upper end of the central tube (7) through threads, an upper cone (6) and a lower cone (14) are sleeved on the outer side of the central tube (7), the upper cone (6) is fixed to the upper portion of the central tube (7) through a setting pin, the lower cone (14) is fixed to the lower portion of the central tube (7) through an unsetting pin, a slip (12) is arranged on the outer side of the central tube (7), the axial position of the slip is located between the upper cone (6) and the lower cone (14), and ratchets (16) are machined on the outer side of the slip (12);
the rubber cylinders are three and are respectively called an upper rubber cylinder (8), a middle rubber cylinder (9) and a lower rubber cylinder (10), the three rubber cylinders are sleeved on the outer side of the upper cone (6), and a steel spacer ring A and a steel spacer ring B are respectively arranged between every two adjacent rubber cylinders;
the inner side of the upper cone (6) is in sliding sealing fit with the central pipe (7), the upper end of the upper cone (6) is inserted between the central pipe (7) and the upper joint (1), the outer surface of the upper cone (6) is in sliding sealing fit with the inner surface of the upper joint (1), and the upper part of the central pipe (7) and the upper end of the upper cone (6) are correspondingly provided with liquid passing holes (3);
the setting piston (2) is sleeved on the outer side of the upper cone (6) and is in sliding sealing fit with the outer surface of the upper cone (6), the upper end of the setting piston (2) is sleeved on the outer side of the lower end of the upper joint (1) and is in sliding sealing fit with the upper joint (1), a spring (5) is arranged between the upper side of the setting piston (2) and the upper joint (1), the setting piston (2) always keeps a movement trend away from the upper joint (1) under the elastic force action of the spring (5), and a push ring (18) is arranged between the lower end of the setting piston (2) and the upper rubber barrel (8);
an annular groove is formed in the outer side of the upper connector (1), a C-shaped clamp spring (19) is installed in the annular groove, and one-way backstop threads (20) which are matched with each other are respectively formed in the outer side of the C-shaped clamp spring (19) and the inner side of the setting piston (2);
the lower rubber cylinder (10) is provided with a thin-wall section, the thin-wall section extends downwards to the outer side of the slips (12), and the thin-wall section is provided with a window (13) for the slips (12) to extend out;
the slip (12) is provided with four arc plates (15) corresponding to the four slips (12), the four arc plates (15) are respectively arranged between the two adjacent slips (12), the arc plates (15) are provided with an inner arc surface and an outer arc surface, the inner arc surface and the outer arc surface are called as the inner arc surface and the outer arc surface, and the diameter of the outer arc surface is equal to the difference value between the inner diameter of the sleeve and the wall thickness of the thin-wall section;
the inner side of the arc-shaped plate (15) is fixedly provided with a sliding rod, and the sliding rod is inserted on the central pipe (7) in a sliding manner and can slide along the radial direction of the central pipe (7).
2. The stepwise-setting soluble bridge plug according to claim 1, wherein: and a framework ring (11) is arranged on the inner side of the lower rubber cylinder (10).
3. A step-wise setting soluble bridge plug according to claim 2, wherein: the skeleton ring (11) is a solid ring made of rubber, and the hardness of the skeleton ring (11) is greater than that of the lower rubber cylinder (10).
4. A step-wise setting soluble bridge plug according to claim 2, wherein: the skeleton ring (11) comprises a hollow saccular structure (21) made of rubber, and hydraulic oil (22) is filled in the hollow saccular structure (21).
5. A step-wise setting soluble bridge plug according to claim 2, wherein: the skeleton ring (11) comprises a hollow saccate structure (21) made of rubber, and steel balls (23) are filled in the hollow saccate structure (21).
6. The stepwise-setting soluble bridge plug according to claim 5, wherein: gaps among the steel balls (23) are filled with rubber.
7. The stepwise-setting soluble bridge plug according to claim 5, wherein: gaps among the steel balls (23) are filled with hydraulic oil (22).
8. A step-wise setting soluble bridge plug according to claim 2, wherein: the framework ring (11) comprises a hollow saccate structure (21) made of rubber, an inner rubber ring (24) is arranged in the hollow saccate structure (21), a steel wire (25) is spirally wound on the outer side of the inner rubber ring (24), and lubricating oil is coated on the surface of the steel wire (25).
9. The stepwise-setting soluble bridge plug according to claim 1, wherein: a boss (17) is arranged on the slip (12), and the ratchet (16) is arranged at the top of the boss (17).
10. The stepwise-setting soluble bridge plug according to claim 1, wherein: and a necking section is arranged on the thin-wall section corresponding to the position of the slips (12), and the slips (12) are arranged between the upper cone (6) and the lower cone (14) under the constraint of the necking section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110727135.8A CN113338850A (en) | 2021-06-29 | 2021-06-29 | Step-by-step setting soluble bridge plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110727135.8A CN113338850A (en) | 2021-06-29 | 2021-06-29 | Step-by-step setting soluble bridge plug |
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| Publication Number | Publication Date |
|---|---|
| CN113338850A true CN113338850A (en) | 2021-09-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110727135.8A Withdrawn CN113338850A (en) | 2021-06-29 | 2021-06-29 | Step-by-step setting soluble bridge plug |
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| CN (1) | CN113338850A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114458236A (en) * | 2022-01-18 | 2022-05-10 | 大庆市天德忠石油科技有限公司 | Soluble bridge plug for petroleum and natural gas drilling |
| CN116733417A (en) * | 2023-08-16 | 2023-09-12 | 陕西海格瑞恩实业有限公司 | Anti-drop's soluble bridging plug |
| CN116892378A (en) * | 2023-09-11 | 2023-10-17 | 大庆信辰油田技术服务有限公司 | Soluble bridge plug special for oil and gas well production increase |
| CN117166953A (en) * | 2023-11-02 | 2023-12-05 | 大庆市璞庆钻采设备制造有限公司 | Mechanical wellhead sealing protection device |
-
2021
- 2021-06-29 CN CN202110727135.8A patent/CN113338850A/en not_active Withdrawn
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114458236A (en) * | 2022-01-18 | 2022-05-10 | 大庆市天德忠石油科技有限公司 | Soluble bridge plug for petroleum and natural gas drilling |
| CN116733417A (en) * | 2023-08-16 | 2023-09-12 | 陕西海格瑞恩实业有限公司 | Anti-drop's soluble bridging plug |
| CN116733417B (en) * | 2023-08-16 | 2023-11-10 | 陕西海格瑞恩实业有限公司 | Anti-drop's soluble bridging plug |
| CN116892378A (en) * | 2023-09-11 | 2023-10-17 | 大庆信辰油田技术服务有限公司 | Soluble bridge plug special for oil and gas well production increase |
| CN116892378B (en) * | 2023-09-11 | 2023-12-19 | 大庆信辰油田技术服务有限公司 | Soluble bridge plug special for oil and gas well production increase |
| CN117166953A (en) * | 2023-11-02 | 2023-12-05 | 大庆市璞庆钻采设备制造有限公司 | Mechanical wellhead sealing protection device |
| CN117166953B (en) * | 2023-11-02 | 2024-02-06 | 大庆市璞庆钻采设备制造有限公司 | Mechanical wellhead sealing protection device |
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