CN111577199A - Bridge plug with sand production preventing function for fracturing and using method thereof - Google Patents
Bridge plug with sand production preventing function for fracturing and using method thereof Download PDFInfo
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- CN111577199A CN111577199A CN202010392073.5A CN202010392073A CN111577199A CN 111577199 A CN111577199 A CN 111577199A CN 202010392073 A CN202010392073 A CN 202010392073A CN 111577199 A CN111577199 A CN 111577199A
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- push cylinder
- cylinder
- fracturing
- setting
- sealing rubber
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
- E21B33/134—Bridging plugs
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
- E21B43/08—Screens or liners
Abstract
The invention relates to the field of underground partial pressure tools for fracturing of oil and gas fields, in particular to a bridge plug for fracturing with a sand production prevention function and a using method thereof, wherein the bridge plug comprises the following steps: the base sleeve base, the locking portion, the setting push cylinder, the sealing rubber cylinder, the ball seat, the setting cylinder and the explosive are arranged outside the central tube from bottom to top in sequence, the explosive, the setting push cylinder, the sealing rubber cylinder, the ball seat, the setting cylinder and the explosive are in contact with each other, the lower end of the setting push cylinder is in contact with the locking portion and located in the locking portion, so that the top end of the setting push cylinder is located in the sealing rubber cylinder, and the explosive, the setting push cylinder, the ball seat, the sealing rubber cylinder and the inner circle face of the setting push cylinder are in clearance fit with the central tube. The invention effectively solves the problems that the returned solid matters damage the wellhead and the oil and gas production pipelines by high-speed erosion, the returned solid matters block the inner diameter of the bridge plug and the like, and realizes the bridge plug capable of preventing blocking.
Description
Technical Field
The invention relates to the field of underground partial pressure tools for fracturing of oil and gas fields, in particular to a bridge plug for fracturing with a sand production preventing function and a using method thereof.
Background
The single-well yield of the compact oil gas and shale oil gas horizontal well depends on the size of the reservoir transformation volume, in order to increase the transformation volume of unconventional resources such as compact oil gas, shale oil gas and the like and improve the development effect, the application proportion of the horizontal well bridge plug staged fracturing process is gradually improved, the process is a main technology for developing the unconventional oil gas reservoir horizontal well in North America, the application proportion reaches more than 80 percent, and the process is also a key technology for the volume fracturing of the horizontal well such as compact oil, shale gas and the like in the oilfield in China.
At present, the application proportion of the bridge plug multistage fracturing process is up to more than 80%, the main working mode is that the bridge plug is set by a setting tool after being lowered to a preset position through a cable, fracturing construction is carried out on a target interval after setting is completed, another stage of bridge plug is lowered after the construction of the target interval is completed, the previous target interval is plugged, and fracturing construction of the next target interval is completed.
However, in the process of implementing the present invention, the inventor finds that the prior art has at least the following problems: in the liquid drainage and production putting stage after the oil and gas well fracturing transformation, because the sand added by fracturing and other fillers in the stratum are moved out along with a large amount of stratum fluid, a well head, an oil extraction pipeline and a gas pipeline are damaged by high-speed erosion, and simultaneously, because the inner drift diameter of the bridge plug is relatively small, the risk of blockage by the return products of the sand and the like exists.
"a fracturing is with removing bridging plug certainly" among the prior art, its application number is 201511018677.9, and this technique is strikeed the slips through the secondary explosion and is moved outward and fix at the pipeline inner wall, because can produce the space behind the explosion device explosion, makes a support section of thick bamboo can draw close each other, can make packing element and slips inefficacy, has unstable defect, does not reach anticipated result of use.
Disclosure of Invention
The invention provides a bridge plug for fracturing with a sand production prevention function and a using method thereof, which solve the problems that returned solid matters damage a wellhead and an oil and gas production pipeline at high speed and the returned solid matters block the inner diameter of the bridge plug and realize the bridge plug capable of preventing blocking.
The technical problem solved by the invention can be realized by adopting the following technical scheme:
a bridge plug for fracturing with a sand production prevention function comprises: the base sleeve base, the locking portion, the setting push cylinder, the sealing rubber cylinder, the ball seat, the setting cylinder and the explosive are arranged outside the central tube from bottom to top in sequence, the explosive, the setting push cylinder, the sealing rubber cylinder, the ball seat, the setting cylinder and the explosive are in contact with each other, the lower end of the setting push cylinder is in contact with the locking portion and located in the locking portion, so that the top end of the setting push cylinder is located in the sealing rubber cylinder, and the explosive, the setting push cylinder, the ball seat, the sealing rubber cylinder and the inner circle face of the setting push cylinder are in clearance fit with the central tube.
Shear nails are fixedly connected between the base and the central tube, at least two pairs of shear nails are arranged between the base and the central tube, and the at least two pairs of shear nails are uniformly distributed between the base and the central tube.
A sand control net is fixed on the lower surface of the base, and the bottom end of the central pipe is located in the sand control net.
The sand control net is of a tubular structure, rectangular channels are formed in the outer circumferential surface of the sand control net at equal intervals, the width of each channel is 0.1mm, and a sealing plate is fixed at the bottom end of the sand control net.
The locking part comprises at least three slips of a fan-shaped structure, the slips are sleeved outside the central pipe in an end-to-end contact manner, the inner sides of the slips are provided with push surfaces with the same angle and inclined from the lower end of the inner side to the upper end of the outer side, and the setting push cylinder is provided with an inclined surface which is opposite to the push surface and has the same angle with the push surface and is in contact with the push surface.
The slip is externally provided with a bulge.
The upper part of the setting push cylinder is provided with a guide surface which is inclined inwards from the outer circumferential surface, and the guide surface is positioned below the sealing rubber cylinder.
The lower end in the setting push cylinder is provided with inner anchoring teeth, the outer wall surface of the central tube is provided with outer anchoring teeth, and the outer anchoring teeth are meshed with the lower ends of the inner anchoring teeth.
A method for using a bridge plug with a sand production prevention function for fracturing at least comprises the bridge plug with the sand production prevention function for fracturing, and further comprises the following steps:
the method comprises the following steps that firstly, preparation is carried out, wherein a cable is connected with the top end of a central tube and extends downwards through the cable, so that the central tube, a setting push cylinder, a base, a ball seat, a sealing rubber cylinder, a setting cylinder, a locking part and explosives on the central tube are placed to preset positions;
secondly, locking, namely detonating an explosive at the top end of a setting push cylinder by a cable, pushing the setting push cylinder to move downwards quickly by the impact force formed by the explosive, pushing a ball seat and a sealing rubber cylinder to move downwards quickly by the setting push cylinder, simultaneously plugging the sealing rubber cylinder between the setting cylinder and a pipe wall, simultaneously plugging the sealing rubber cylinder between the setting cylinder and the pipe wall, rapidly moving the setting cylinder downwards, pushing slips to move outwards, clamping the slips in the pipe wall, simultaneously plugging the setting push cylinder downwards to drive an inner anchoring tooth to move along with the downward movement, meshing an outer anchoring tooth with the upper part of the inner anchoring tooth, simultaneously reversely aligning the inner anchoring tooth and the outer anchoring tooth, and preventing the setting cylinder from moving upwards due to inward rebound of the slips to complete locking by limiting the rebound and upward movement of the inner anchoring tooth;
thirdly, separation, wherein the base moves downwards under impact force while the setting cylinder pushes the slips to move outwards, so that the shear nails between the central pipe and the base are broken, and the central pipe is separated from the base;
fourthly, throwing balls, after the central pipe is separated from the base, driving the central pipe and the setting push cylinder to be lifted out of the well through a cable, then throwing soluble fracturing plugging balls to complete plugging of the fractured well section, and then performing fracturing operation on the well section above the soluble fracturing plugging balls;
and fifthly, after fracturing is completed, the gas or liquid fluid in the stratum carries the solid propping agent or the stratum filler to enter the shaft, and when the solid flows to the position of the sand control net, the solid is blocked by the vertical strip-shaped passage on the side surface of the sand control net and cannot flow to the wellhead.
The invention has the beneficial effects that: the sand control net is arranged under the bridge plug, so that the problem of sand blocking of the inner drift diameter of the bridge plug in the prior art is effectively solved, and meanwhile, the problem that fillers such as fracturing sand, stratum rocks and the like are moved out along with a large amount of fluid can be reduced, so that a wellhead, an oil extraction pipeline and an air pipeline are damaged by high-speed erosion is solved.
Through interior anchor tooth and outer anchor tooth, effectively solved the slips when the push pipe wall, can produce the problem of kick-backing, through interior anchor tooth and outer anchor tooth cooperation restriction, prevent to sit a section of thick bamboo and receive the slips to promote and rebound, make the card that the slips is stable in the pipe wall.
Drawings
The invention is further illustrated with reference to the following figures and examples.
Fig. 1 is a schematic structural view of the present invention.
FIG. 2 is a top view of the slips of the present invention.
FIG. 3 is an enlarged view of the inner and outer anchor teeth of the present invention.
In the figure: 1-a central tube; 2-setting the push cylinder; 3-a base; 4-a ball seat; 5-sealing the rubber cylinder; 6-setting the cylinder; 7-explosives; 8-shear nails; 9-a sand control net; 10-closing the plate; 11-slips; 12-a bump; 13-inner anchoring teeth; 14-outer anchoring teeth.
Detailed Description
Example 1:
referring to fig. 1, which is a schematic structural view of embodiment 1 of the present invention, a bridge plug for fracturing having a sand production prevention function includes: the base sleeve comprises a central tube 1, a setting push cylinder 6, a base 3, a ball seat 4, a sealing rubber cylinder 5, a setting cylinder 2, a locking part and an explosive 7, wherein the base sleeve base 3, the locking part, the setting push cylinder 6, the sealing rubber cylinder 5, the ball seat 4, the setting cylinder 2 and the explosive 7 are sequentially arranged outside the central tube 1 from bottom to top, the explosive 7, the setting cylinder 2, the ball seat 4 and the sealing rubber cylinder 5 are in mutual contact, the lower end of the setting push cylinder 6 is in contact with the locking part and is located in the locking part, so the top end of the setting push cylinder 6 is located in the sealing rubber cylinder 5, and the explosive 7, the setting cylinder 2, the ball seat 4, the sealing rubber cylinder 5 and the setting push cylinder 6 are in clearance fit with the central tube 1 on the circumferential surface.
In actual use: the cable is connected with the top end of a central tube 1, the central tube 1 and a setting push cylinder 6, a base 3, a ball seat 4, a sealing rubber cylinder 5, a setting cylinder 2, a locking part and explosives 7 on the central tube 1 are enabled to be lowered to preset positions through the cable to detonate the explosives 7 at the top end of the setting push cylinder 6, the setting push cylinder 6 is pushed to move downwards quickly by impact force formed by the explosives 7, the setting push cylinder 6 pushes the ball seat 4 and the sealing rubber cylinder 5 to move downwards quickly, the sealing rubber cylinder 5 is plugged between the setting cylinder 2 and the tube wall, the setting cylinder 2 moves downwards quickly while the sealing rubber cylinder 5 is plugged between the setting cylinder 2 and the tube wall, a slip 11 is pushed to move outwards, the slip 11 is clamped in the tube wall to complete locking, the base 3 moves downwards by impact force while the setting cylinder 2 pushes the slip 11 to move outwards, the central tube 1 is separated from the base 3, the central tube 1 and the setting push cylinder 6 are driven to be lifted out of the well through the cable, then putting soluble fracturing plugging balls to plug the fractured well section, and then performing fracturing operation on the well section above the soluble fracturing plugging balls.
Example 2:
referring to fig. 1, the present embodiment is different from embodiment 1 in that: shear nails 8 are fixedly connected between the base 3 and the central tube 1, at least two pairs of shear nails 8 are arranged, and at least two pairs of shear nails 8 are uniformly distributed between the base 3 and the central tube 1.
In actual use: when the setting cylinder 2 pushes the slips 11 to move outwards, the base 3 moves downwards under impact force, so that the shear nails 8 between the central pipe 1 and the base 3 are broken, and the central pipe 1 is separated from the base 3.
Example 3:
referring to fig. 1, the present embodiment is different from embodiment 2 in that: the sand control net 9 is fixed on the lower surface of the base 3, and the bottom end of the central pipe 1 is positioned in the sand control net 9.
In actual use: after the upper fracturing section of the soluble fracturing plugging ball plugging is completed, the gaseous or liquid fluid in the stratum carries the solid propping agent or the stratum filler to enter the shaft, and when the solid flows to the position of the sand control net 9, the solid is blocked by the sand control net 9 and cannot flow to a wellhead.
Example 4:
referring to fig. 1, the present embodiment is different from embodiment 3 in that: the sand control net 9 is of a tubular structure, rectangular channels are formed in the outer circumferential surface of the sand control net 9 at equal intervals, the width of each channel is 0.1mm, and a sealing plate 10 is fixed at the bottom end of the sand control net 9.
In actual use: when the gaseous or liquid fluid in the stratum carries the solid propping agent or the stratum filler to flow to the position of the sand control net 9, the solid is blocked by the vertical strip-shaped passages on the side surface of the sand control net 9, and the blocking of the strip-shaped passages can reduce the blocking of all the passages and can keep the space flowing liquid.
Example 5:
referring to fig. 1-2, this embodiment is different from embodiment 4 in that: the locking part comprises at least three slips 11 of a fan-shaped structure, the slips 11 are sleeved outside the central tube 1 in an end-to-end contact manner, the inner sides of the slips 11 are all provided with pushing surfaces which have the same angle and are inclined from the lower ends of the inner sides to the upper ends of the outer sides, and the setting push cylinder 6 is provided with an inclined surface which is opposite to the pushing surfaces and has the same angle with the pushing surfaces and is in contact with the pushing surfaces.
In actual use: in this embodiment, the number of the slips 11 is four, when the setting barrel 2 moves downwards, because the setting barrel 2 is located on the inclined plane of the slips 11, the setting barrel 2 moves downwards, the slips 11 moves outwards due to the pushing surface and clings to the inner wall of the pipeline, because the setting barrel 2 moves upwards and is limited by the sealing rubber barrel 5, the slips 11 can not move downwards due to the base 3, and the slips 11 are tightly clamped between the pipeline and the setting barrel 2.
Example 6:
referring to fig. 1, the present embodiment is different from embodiment 5 in that: the slip 11 is externally provided with a bulge 12.
In actual use: the friction force between the slips 11 and the inner wall surface of the pipeline can be increased through the protrusions 12 on the slips 11.
Example 7:
referring to fig. 1, this embodiment is different from embodiment 6 in that: the upper part of the setting push cylinder 6 is provided with a guide surface which is inclined inwards from the outer circumferential surface, and the guide surface is positioned below the sealing rubber cylinder 5.
In actual use: when the sealing rubber tube 5 is pushed by the ball seat 4, the sealing rubber tube 5 moves downwards, due to the guide surface effect, the sealing rubber tube 5 expands and moves downwards, when the bottom of the ball seat 4 is contacted with the top of the setting rubber tube 2, the sealing rubber tube 5 is clamped between the setting rubber tube 2 and the tube wall, and due to the rubber characteristic, the sealing rubber tube 5 is limited by the tube wall, and the setting rubber tube 2 is clamped tightly.
Example 8:
referring to fig. 3, this embodiment is different from embodiment 7 in that: the lower end in the setting cylinder 2 is provided with inner anchoring teeth 13, the outer wall surface of the central tube 1 is provided with outer anchoring teeth 14, and the outer anchoring teeth 14 are meshed with the lower ends of the inner anchoring teeth 13.
In actual use: the setting push cylinder 6 moves downwards to drive the inner anchoring teeth 13 to move along with the setting push cylinder, the outer anchoring teeth 14 are meshed with the upper parts of the inner anchoring teeth, meanwhile, the tooth directions of the inner anchoring teeth 13 and the outer anchoring teeth 14 are opposite, and the setting push cylinder 2 is prevented from moving upwards due to the inward rebounding of the slips 11 through limiting the rebound of the inner anchoring teeth 13.
Example 9:
a method for using a bridge plug with a sand production prevention function for fracturing at least comprises the bridge plug with the sand production prevention function for fracturing, and further comprises the following steps:
the method comprises the following steps that firstly, preparation is carried out, wherein a cable is connected with the top end of a central tube 1 and extends downwards through the cable, so that the central tube 1, a setting push cylinder 6, a base 3, a ball seat 4, a sealing rubber cylinder 5, a setting cylinder 2, a locking part and explosives 7 on the central tube 1 are lowered to preset positions;
secondly, locking, namely detonating an explosive 7 at the top end of a setting push cylinder 6 by a cable, pushing the setting push cylinder 6 to move downwards quickly by the impact force formed by the explosive 7, pushing a ball seat 4 and a sealing rubber cylinder 5 to move downwards quickly by the setting push cylinder 6, simultaneously plugging the sealing rubber cylinder 5 between the setting push cylinder 2 and the pipe wall, simultaneously enabling the setting push cylinder 2 to move downwards quickly, pushing slips 11 to move outwards, clamping the slips 11 in the pipe wall, simultaneously enabling the setting push cylinder 6 to move downwards to drive an inner anchoring tooth 13 to move along with the sealing push cylinder, enabling an outer anchoring tooth 14 to be meshed with the upper part of the inner anchoring tooth, enabling the inner anchoring tooth 13 and the outer anchoring tooth 14 to have opposite tooth directions, and preventing the setting push cylinder 2 from moving upwards due to inward rebound of the slips 11 by limiting the upward movement of the inner anchoring tooth 13, and completing locking;
thirdly, separation, wherein the setting cylinder 2 in the second step pushes the slips 11 to move outwards, and simultaneously, the base 3 moves downwards under impact force, so that the shear nails 8 between the central pipe 1 and the base 3 are broken, and the central pipe 1 is separated from the base 3;
fourthly, throwing balls, after the central pipe 1 is separated from the base 3 in the third step, driving the central pipe 1 and the setting push cylinder 6 to be lifted out of the well through a cable, then throwing soluble fracturing plugging balls to finish plugging fractured well sections, and then performing fracturing operation on the well sections above the soluble fracturing plugging balls;
and fifthly, after fracturing is completed, the gas or liquid fluid in the stratum carries the solid propping agent or the stratum filler to enter the shaft, and when the solid flows to the position of the sand control net 9, the solid is blocked by the vertical strip-shaped passage on the side surface of the sand control net 9 and cannot flow to the wellhead.
While the embodiments of the present invention have been described in detail with reference to the drawings, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art, and the scope of the present invention is within the scope of the claims.
Claims (9)
1. The utility model provides a bridge plug for fracturing with prevent sand function which characterized in that includes: center tube (1), seat push cylinder (6), base (3), ball seat (4), sealing rubber tube (5), seat push cylinder (2), locking portion and explosive (7), supreme seat cover base (3), locking portion, seat push cylinder (6), sealing rubber tube (5), ball seat (4), seat push cylinder (2) and explosive (7) in proper order are followed down to center tube (1) outer, contact each other between explosive (7), seat push cylinder (2), ball seat (4), the sealing rubber tube (5), seat push cylinder (6) lower extreme and locking portion contact and be located locking portion, so seat push cylinder (6) top is located sealing rubber tube (5), explosive (7), seat push cylinder (2), ball seat (4), sealing rubber tube (5) and seat push cylinder (6) interior global and center tube (1) clearance fit.
2. The bridge plug with the sand production preventing function for fracturing is characterized in that shear nails (8) are fixedly connected between the base (3) and the central pipe (1), at least two pairs of shear nails (8) are arranged between the base (3) and the central pipe (1), and at least two pairs of shear nails (8) are uniformly distributed between the base (3) and the central pipe (1).
3. The bridge plug for fracturing with the sand production prevention function according to claim 1, wherein a sand control net (9) is fixed on the lower surface of the base (3), and the bottom end of the central pipe (1) is positioned in the sand control net (9).
4. The bridge plug for fracturing with sand production prevention function according to claim 3, wherein the sand control net (9) is a cylindrical structure, rectangular passages are equidistantly arranged on the outer circumferential surface of the sand control net (9), the width of the passages is 0.1mm, and a closing plate (10) is fixed at the bottom end of the sand control net (9).
5. The bridge plug for fracturing with the sand production preventing function according to claim 1, wherein the locking part comprises at least three slips (11) with sector structures, the at least three slips (11) are sleeved outside the central pipe (1) in an end-to-end contact manner, the inner sides of the at least three slips (11) are provided with pushing surfaces with the same angle and inclined from the lower end of the inner side to the upper end of the outer side, and the setting push cylinder (6) is provided with an inclined surface which is opposite to the pushing surfaces and has the same angle to contact with the pushing surfaces.
6. A bridge plug for fracturing with sand production prevention function according to claim 5, characterized in that the slips (11) are externally provided with protrusions (12).
7. The bridge plug for fracturing with sand production prevention function according to claim 1, wherein the upper part of the setting push cylinder (6) is provided with a guide surface which is inclined inwards from the outer circumferential surface, and the guide surface is positioned below the sealing rubber cylinder (5).
8. The bridge plug for fracturing with the sand production prevention function according to claim 1, wherein the setting push cylinder (6) is provided with inner anchoring teeth (13) at the inner lower end, the central tube (1) is provided with outer anchoring teeth (14) on the outer wall surface, and the outer anchoring teeth (14) are meshed with the lower ends of the inner anchoring teeth (13).
9. A method for using a bridge plug for fracturing with a sand production prevention function, which is characterized by comprising at least the bridge plug for fracturing with the sand production prevention function of any one of claims 1 to 8, and further comprising the following steps:
the method comprises the following steps that firstly, a cable is connected with the top end of a central tube (1) and extends downwards through the cable, so that the central tube (1) and a setting push cylinder (6), a base (3), a ball seat (4), a sealing rubber cylinder (5), a setting cylinder (2), a locking part and explosives (7) on the central tube (1) are placed to preset positions;
secondly, locking, detonating explosive (7) at the top end of the setting push cylinder (6) by a cable, pushing the setting push cylinder (6) to move downwards quickly by impact force formed by the explosive (7), pushing the ball seat (4) and the sealing rubber cylinder (5) to move downwards quickly by the setting push cylinder (6), simultaneously plugging the sealing rubber cylinder (5) between the setting push cylinder (2) and the pipe wall, plugging the sealing rubber cylinder (5) between the setting push cylinder (2) and the pipe wall while the setting push cylinder (2) moves downwards quickly, pushing the slips (11) to move outwards, clamping the slips (11) in the pipe wall, simultaneously plugging the setting push cylinder (6) to move downwards to drive the inner anchoring teeth (13) to move along with the pipe wall, meshing the outer anchoring teeth (14) with the upper parts of the inner anchoring teeth, simultaneously reversely rotating the inner anchoring teeth (13) and the outer anchoring teeth (14), and preventing the setting push cylinder (2) from rebounding upwards due to the slips (11), completing locking;
thirdly, separation, wherein the base (3) moves downwards under impact force while the setting cylinder (2) pushes the slips (11) to move outwards, so that the shear nails (8) between the central tube (1) and the base (3) are broken, and the central tube (1) is separated from the base (3);
fourthly, throwing balls, after the central pipe (1) is separated from the base (3) in the third step, driving the central pipe (1) and the setting push cylinder (6) to be lifted out of the well through a cable, then throwing soluble fracturing plugging balls to complete plugging of the fractured well section, and then performing fracturing operation on the well section above the soluble fracturing plugging balls;
and fifthly, after fracturing is completed, the gas or liquid fluid in the stratum carries the solid propping agent or the stratum filler to enter the shaft, and when the solid flows to the position of the sand control net (9), the solid is blocked by the vertical strip-shaped passage on the side surface of the sand control net (9) and cannot flow to the wellhead.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010392073.5A CN111577199B (en) | 2020-05-11 | 2020-05-11 | Bridge plug with sand production preventing function for fracturing and using method thereof |
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| CN202010392073.5A CN111577199B (en) | 2020-05-11 | 2020-05-11 | Bridge plug with sand production preventing function for fracturing and using method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112855066A (en) * | 2021-01-05 | 2021-05-28 | 孙淑芳 | From soluble bridging plug of taking fracturing ball |
| CN112855066B (en) * | 2021-01-05 | 2021-09-14 | 大安鸿源管业有限公司 | From soluble bridging plug of taking fracturing ball |
| GB2620838A (en) * | 2022-06-10 | 2024-01-24 | Tco As | Asymmetric bearing ring |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111577199B (en) | 2023-01-06 |
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