CN114607315B - Bridge plug and assembling method thereof - Google Patents
Bridge plug and assembling method thereof Download PDFInfo
- Publication number
- CN114607315B CN114607315B CN202210085791.7A CN202210085791A CN114607315B CN 114607315 B CN114607315 B CN 114607315B CN 202210085791 A CN202210085791 A CN 202210085791A CN 114607315 B CN114607315 B CN 114607315B
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- slip
- seat
- adjusting
- conical surface
- clamping
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- 238000000034 method Methods 0.000 title claims abstract description 19
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910052802 copper Inorganic materials 0.000 claims abstract description 14
- 239000010949 copper Substances 0.000 claims abstract description 14
- 238000009751 slip forming Methods 0.000 claims abstract description 8
- 230000007246 mechanism Effects 0.000 claims description 84
- 238000005553 drilling Methods 0.000 claims description 53
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 15
- 230000001070 adhesive effect Effects 0.000 claims description 14
- 239000000853 adhesive Substances 0.000 claims description 13
- 238000003754 machining Methods 0.000 claims description 12
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 11
- 238000005488 sandblasting Methods 0.000 claims description 9
- 229910000531 Co alloy Inorganic materials 0.000 claims description 5
- JPNWDVUTVSTKMV-UHFFFAOYSA-N cobalt tungsten Chemical compound [Co].[W] JPNWDVUTVSTKMV-UHFFFAOYSA-N 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 4
- 239000003292 glue Substances 0.000 claims description 4
- 229920002635 polyurethane Polymers 0.000 claims description 4
- 239000004814 polyurethane Substances 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 4
- 238000005507 spraying Methods 0.000 claims description 3
- 239000011230 binding agent Substances 0.000 claims description 2
- FGBJXOREULPLGL-UHFFFAOYSA-N ethyl cyanoacrylate Chemical compound CCOC(=O)C(=C)C#N FGBJXOREULPLGL-UHFFFAOYSA-N 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 19
- 238000007789 sealing Methods 0.000 abstract description 11
- 229920001971 elastomer Polymers 0.000 description 8
- 239000007767 bonding agent Substances 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- IJVRPNIWWODHHA-UHFFFAOYSA-N 2-cyanoprop-2-enoic acid Chemical compound OC(=O)C(=C)C#N IJVRPNIWWODHHA-UHFFFAOYSA-N 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000007788 roughening Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
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)
- Earth Drilling (AREA)
Abstract
A bridge plug and an assembling method thereof, wherein the bridge plug comprises a slip seat, slips, a cone, an expansion ring and a central tube; the slips are arranged at one end of the slip seat; the cone is arranged at the other end of the slip; the expansion ring is sleeved on the central tube and is arranged between the cone and the central tube; the central tube is connected in the cone in a threaded fit manner; the outer wall of the slip is embedded with a plurality of slip teeth; one end of the slip, which is assembled with the cone, is formed with a first inner conical surface, and the inner side end of the first inner conical surface is continuously formed with a second inner conical surface; a first outer conical surface is formed at one end of the cone, which is assembled with the slips, and a second outer conical surface is continuously formed at the inner side end of the first outer conical surface; the inclination angle of the second inner conical surface is consistent with that of the second outer conical surface, and the inclination angle of the second inner conical surface is consistent with that of the first outer conical surface; the inner wall of the expansion ring is of an arc-shaped structure, and the expansion ring is made of red copper. According to the scheme, the fixing effect of the slips and the sleeve is improved, the cost is saved, the sealing effect of the bridge plug in a high-temperature environment is integrally improved, and the practicability is high.
Description
Technical Field
The invention relates to the technical field related to structural members for oil and gas exploitation, in particular to a bridge plug and an assembling method of the bridge plug.
Background
The bridge plug can temporarily block the oil, gas, water and other layers, and the exploitation operation of oil gas and the like is realized by carrying out high-pressure fracturing construction operation on the upper part of the bridge plug.
The slips, in turn, act as a bite-stabilizing element of the bridge plug which interacts with a sleeve disposed on the outside of the bridge plug for the securement of the entire bridge plug, while the critical element thereof is the slip teeth disposed on the slips. The existing slip teeth are generally installed by adopting a thermal assembly method, the installation method can be normally used when the temperature of a construction environment is below 100 ℃, and when the temperature is higher than 100 ℃, the diameter of a sleeve is increased due to the effect of thermal expansion, the dimensional change is obviously increased along with the increase of the temperature, and the effect of fixing a bridge plug is finally lost.
Meanwhile, the existing slips and cones generally have only one-stage inclined plane, if the slips and cones are required to have smaller lengths, the angle of the matched inclined plane needs to be increased, and the increase of the angle of the inclined plane influences the fixing effect of the bridge plug, so that the using effect of the bridge plug is adversely affected.
Meanwhile, when the existing bridge plug is sealed, a rubber cylinder is generally adopted, and rubber has excellent elasticity, and after being extruded, the bridge plug can be easily expanded and enlarged, so that the bridge plug is contacted with the inner wall of the sleeve and achieves the sealing effect. However, the strength of the rubber cylinder is low, and the tensile strength is generally lower than 40MPa, so that the maximum sealing limit pressure of the rubber cylinder is lower, the sealing effect of the rubber cylinder is obviously reduced when the temperature is overhigh, and the sealing performance is obviously reduced after the temperature reaches 120 ℃.
Disclosure of Invention
The invention provides the bridge plug and the assembling method thereof, which solve the defects of the prior art, improve the fixing effect of the slips and the sleeve, save the cost, integrally improve the sealing effect of the bridge plug in a high-temperature environment and have stronger practicability.
In order to achieve the object of the present invention, the following techniques are proposed:
A bridge plug comprises a slip seat, slips, a cone, an expansion ring and a central tube;
the slips are arranged at one end of the slip seat;
the cone is arranged at the other end of the slip;
The expansion ring is sleeved on the central tube and is arranged between the cone and the central tube;
the central tube is connected in the cone in a threaded fit manner;
The outer wall of the slip is embedded with a plurality of slip teeth;
one end of the slip, which is assembled with the cone, is formed with a first inner conical surface, and the inner side end of the first inner conical surface is continuously formed with a second inner conical surface;
A first outer conical surface is formed at one end of the cone, which is assembled with the slips, and a second outer conical surface is continuously formed at the inner side end of the first outer conical surface;
the inclination angle of the second inner conical surface is consistent with that of the second outer conical surface, and the inclination angle of the second inner conical surface is consistent with that of the first outer conical surface;
The inner wall of the expansion ring is of an arc-shaped structure, and the expansion ring is made of red copper.
Further, the slip teeth are of a cylindrical structure and made of tungsten-cobalt alloy, the slip teeth are obliquely arranged on the slip, and an included angle formed between the axial direction of the slip teeth and the radial direction of the slip is 5-10 degrees.
Further, the taper of the first inner conical surface is 30-45 degrees;
The taper of the second inner conical surface is 5-10 degrees.
A method of assembling a bridge plug for use in assembling a bridge plug, comprising the steps of:
step 1, processing inclined holes on slips;
step2, carrying out sand blasting treatment on the inclined hole obtained in the step 1 by adopting silicon carbide, and obtaining a roughened inner wall;
Carrying out sand blasting on the slip teeth by adopting silicon carbide, and coarsening the outer walls of the slip teeth;
Step 3, spraying polyurethane binder on the roughened inner wall obtained in the step 2;
step 4, placing the slips in an oven to primarily harden the adhesive;
step 5, the slip teeth obtained in the step 2 are knocked into the inclined holes;
step 6, placing the slips in an oven to bond and fix slip teeth;
Step7, adopting silicon carbide to carry out sand blasting treatment on the slips, and removing residual adhesive on the periphery of the slip teeth;
and 8, assembling the slip seat, the slips, the cone, the expansion ring and the central tube to form the bridge plug.
Further, 20-40 mesh silicon carbide is adopted to sand the inner wall of the inclined hole, the outer wall of the slip teeth and the outer wall of the slip.
Further, the baking temperature in the step4 is 50-60 ℃ and the baking time is 30min.
Further, the baking temperature in the step 6 is 110-120 ℃, the baking time is 90min, and the baking is cooled by adopting a natural cooling mode.
Further, in step 1, the inclined hole is processed by an inclined hole processing device.
Further, when the bridge plug is assembled in the step 8, the expansion ring is sleeved on the central tube;
Screwing the cone into the central tube and compacting the expander;
then placing the slips on the other end of the cone, and enabling the first inner cone surface to be in contact with the second outer cone surface;
Then the slip seat is placed on the slip, and alignment is carried out;
finally, dripping alpha-cyanoacrylate glue between the first inner conical surface and the second outer conical surface and the contact surface circumference of the slips and the slip seat so as to ensure that the slip seat, the slips and the cone are fixedly connected and form a bridge plug together with the expansion ring and the central tube which are fixed on the cone.
The technical scheme has the advantages that:
1. According to the invention, the slip teeth are fixed with the slips by adopting a bonding mode of the bonding agent, the bonding agent is coated in the filling holes of the slip teeth, the bonding of the bonding agent is flexible and bonding, and meanwhile, the bonding agent adopts a high-temperature-resistant polyurethane bonding agent, so that the slip teeth can be fixed in a high-temperature environment, and the slip teeth are prevented from falling off;
2. Secondly, the matching surfaces of the slips and the cone are formed into two-stage inclined surfaces, wherein the inclined surface which is contacted firstly is an inclined surface with a larger angle, under the action of the inclined surface, the slips can realize a larger diameter increment in a smaller axial movement distance, so that the fixing effect of a bridge plug is realized rapidly, the inclined surface which is contacted again is an inclined surface with a smaller angle, the stable combination between the slips and the sleeve can be ensured, the length of the slips is obviously shortened in the mode, meanwhile, under the condition that the inner diameter of the sleeve is fixed, the length of the slips is shortened, so that the cost is saved, the production difficulty is reduced, and meanwhile, the slips and the cone can be kept to have a smaller matching angle to provide firm engagement;
3. And when the extrusion force applied to the copper expander is larger, the adhesion force between the copper expander and the inner wall of the sleeve is larger, and accordingly the sealing effect is improved. And red copper is a metal material, so that the high temperature resistance of the red copper is obviously superior to that of a rubber cylinder, and the pressure born by the red copper is more than 140MPa, so that the sealing effectiveness of the red copper is improved, and the red copper has strong practicability.
Drawings
Fig. 1 shows a cross-section of a bridge plug.
Fig. 2 shows a flow chart of the loading of slip teeth, wherein fig. 2 (a) is the drilling of an inclined hole, fig. 2 (b) is the roughening of the inclined hole, fig. 2 (c) is the adhesive coating, and fig. 2 (d) is the assembly of the slip teeth.
Fig. 3 shows a first perspective view of the inclined hole machining apparatus.
Fig. 4 shows a second perspective view of the inclined hole machining apparatus.
Fig. 5 shows a third perspective view of the inclined hole processing apparatus.
Fig. 6 shows an enlarged view at a in fig. 5.
Reference numerals illustrate: the slip comprises a slip seat-100, a slip-101, a second inner conical surface-102, a first inner conical surface-103, slip teeth-104, a cone-105, a second outer conical surface-106, an expanding ring-107, a central tube-108, an inclined hole-110 and a roughened inner wall-111; the inclined hole machining device-2, the base plate-200, the supporting leg-201, the Y-shaped hole-202, the sliding piece-203, the clamping piece-204, the clamping bearing seat-205, the middle connecting plate-206, the clamping motor-207, the clamping screw rod-208, the clamping seat-209, the clamping push plate-210, the mounting piece-211, the concave frame-212, the first hinging seat-213, the second hinging seat-214, the inner pushing transverse plate-216, the L-shaped hinged plate-217, the V-shaped hinged plate-218, the concave piece-219, the keyhole-220, the azimuth adjusting driving seat-221, the azimuth driving motor-222, the azimuth adjusting driving wheel-223, the toothed ring-224, the fixed inner ring-225, the mounting seat-226, the inner extending convex plate-227, the limiting wheel-228, lifting backboard-229, lifting bearing seat-230, lifting guide rod-260, lifting motor-261, lifting screw rod-262, lifting seat-263, inner rotating seat-231, rotating concave part-232, outer rotating seat-233, worm wheel-234, worm-235, pitching seat-236, pitching motor-237, inner pushing bearing seat-238, inner pushing connecting plate-239, inner pushing motor-240, inner pushing screw rod-241, inner pushing seat-242, inner pushing plate-243, inner pushing end plate-244, adjusting bottom plate-245, guide groove-246, adjusting driving seat-247, adjusting motor-248, adjusting driving wheel-249, adjusting driven wheel-250, adjusting screw sleeve-251, adjusting rotating seat-252, adjusting screw rod-253, the drilling machine comprises an adjusting seat-254, a limiting side plate-255, a folded fixing piece-256 and a drilling motor-257.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention.
The terms "first," "second," and the like are used merely to distinguish between descriptions and are not to be construed as indicating or implying relative importance.
The terms "parallel", "perpendicular", and the like do not denote that the components are required to be absolutely parallel or perpendicular, but may be slightly inclined. For example, "parallel" merely means that the directions are more parallel than "perpendicular" and does not mean that the structures must be perfectly parallel, but may be slightly tilted.
Furthermore, the terms "substantially," "essentially," and the like, are intended to be limited to the precise form disclosed herein and are not necessarily intended to be limiting. For example: the term "substantially equal to" does not mean absolute equal to only that it is difficult to achieve absolute equal to during actual production and operation, and there is generally a certain deviation. Thus, in addition to absolute equality, "approximately equal to" includes the above-described case where there is a certain deviation. In other cases, the terms "substantially", "essentially" and the like are used in a similar manner to those described above unless otherwise indicated.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Example 1
As shown in fig. 1, a bridge plug includes a slip bowl 100, slips 101, cone 105, expander 107, and center tube 108. The slip 101 is disposed at one end of the slip bowl 100, the cone 105 is disposed at the other end of the slip 101, the expansion ring 107 is sleeved on the central tube 108 and is between the cone 105 and the central tube 108, and the central tube 108 is connected in the cone 105 through screw thread fit.
The outer wall of the slip 101 is inlaid with a plurality of slip teeth 104, the slip teeth 104 are of a cylindrical structure and made of tungsten-cobalt alloy, the slip teeth 104 are obliquely arranged on the slip 101, an included angle formed between the axial direction of the slip teeth 104 and the radial direction of the slip 101 is 5-10 degrees, a first inner conical surface 103 is formed at one end of the slip 101 assembled with a cone 105, a second inner conical surface 102 is continuously formed at the inner side end of the first inner conical surface 103, a first outer conical surface is formed at one end of the cone 105 assembled with the slip 101, a second outer conical surface 106 is continuously formed at the inner side end of the first outer conical surface, the inclination angle of the second inner conical surface 102 is consistent with that of the second outer conical surface 106, the inclination angle of the first inner conical surface 103 is consistent with that of the first outer conical surface, the taper angle of the first inner conical surface 103 is 30-45 degrees, and the taper angle of the second inner conical surface 102 is 5-10 degrees.
Wherein, the inner wall of the expander 107 is of an arc structure, and the expander 107 is made of red copper.
In this embodiment, firstly, a round rod-shaped slip tooth 104 made of tungsten-cobalt alloy is adopted, when the slip tooth 104 with the round rod-shaped structure is used for connecting and fixing the slip 101 and the sleeve, a pit is extruded and deformed on the inner wall of the sleeve from the end surface of the round rod-shaped slip tooth 104, and the longer the slip is embedded into the sleeve along with the further opening of the slip 101, and in order to achieve the technical effect, the tungsten-cobalt alloy is adopted as a preparation material of the slip tooth 104, the hardness of the slip tooth made of the alloy is higher than HRA80, and the hardness of the sleeve is lower than HRC40, so that the slip tooth 104 is more easily embedded into the sleeve, thereby improving the stability of the bridge plug fixing in this embodiment, and simultaneously, in order to further improve the stability after the occlusion, the included angle between the axial direction of the slip tooth 104 and the radial direction of the slip 101 is 5-10 degrees.
In this embodiment, the slips 101 and the cone 105 with the secondary inclined planes are adopted, and the design mode firstly realizes the larger opening of the slips 101 through the first outer conical surface and the first inner conical surface 103 under the smaller movement amount of the cone 105, so that the connection effect of the slips 101 and the sleeve is improved while the length of the slips 101 is shortened. And as the cone 105 continues to move, the second outer cone 106 contacts the second inner cone 102 and, under the influence of the second inner cone 102, causes the slips 101 to firmly engage the casing. Meanwhile, in order to remarkably improve the functions of the first outer conical surface and the first inner conical surface 103 when the slips are opened, the taper angles of the first outer conical surface and the first inner conical surface 103 are designed to be 30-45 degrees, so that the effective deformation of the slips 101 can be ensured under the angle, and meanwhile, the connecting effect of the slips 101 and a sleeve can be improved. In order to improve the stability of the connection between the slips 101 and the casing, the taper of the second outer cone 106 and the second inner cone 102 is designed to be 5-10 degrees.
In this embodiment, the rubber cylinder made of rubber is replaced by the expander ring 107 made of red copper, and the high temperature resistance of the expander ring 107 is improved by this design, and meanwhile, the ductility of the metal material is very excellent, so that the improvement of the high temperature resistance is not premised on the sacrifice of the sealing effect and the deformation capability. Meanwhile, in order to facilitate the deformation of the expander 107, the inner wall of the expander 107 is provided with an arc mechanism, so that the expander 107 is easier to shorten and the diameter of the outer wall of the expander is easier to increase in the extrusion deformation process, thereby reducing the deformation difficulty of the expander 107.
Example 2
As shown in fig. 2, the present embodiment provides a method for assembling a bridge plug in embodiment 1, which includes the following steps:
Step 1, a slant hole 110 with the diameter of 8mm is machined on the slip 101 through a slant hole machining device 2.
And 2, carrying out sand blasting on the inclined holes 110 obtained in the step 1 by adopting 20-40 meshes of silicon carbide, obtaining roughened inner walls 111, carrying out sand blasting on the slip teeth 104 by adopting 20-40 meshes of silicon carbide, and roughening the outer walls of the slip teeth 104. In this step, the inclined hole 110 and the slip teeth 104 are roughened by the carborundum, so that when the carborundum and the carborundum are bonded, the bonding capability of the carborundum and the slip teeth is improved, and the slip teeth 104 are prevented from falling off when the bridge plug is used.
And 3, spraying polyurethane adhesive on the roughened inner wall 111 obtained in the step 2, wherein the adhesive has excellent high-temperature resistance, so that the adhesive fixing effect of the slip teeth 104 and the slips 101 at high temperature is improved.
And 4, placing the slips 101 in an oven to harden the adhesive primarily, wherein the baking temperature is 50-60 ℃ and the baking time is 30min. The baking is mainly used for facilitating the knocking-in operation of the slip teeth 104 in the later period, avoiding the bad influence of the fluid-shaped adhesive on the knocking-in of the slip teeth 104, and avoiding the phenomenon that the adhesive is extruded out when the slip teeth 104 are knocked in, thereby ensuring the adhesive quantity in the inclined holes 110 and improving the adhesive effect between the slips 101 and the slip teeth 104.
Step 5, the slip teeth 104 obtained in step 2 are knocked into the inclined holes 110 by copper bars. The copper rod knocking mode is mainly used for avoiding curling or deformation of the slip teeth 104 during knocking, so that the occlusion capacity of the slip teeth 104 is improved.
And 6, placing the slips 101 in an oven to bond and fix the slip teeth 104, baking at 100-120 ℃ for 90min, and cooling in a natural cooling mode after baking. By this step, a connection fixation of the slip teeth 104 and the slips 101 is achieved, and an optimal fixation effect can be achieved at this temperature and time.
And 7, carrying out sand blasting treatment on the slips 101 by adopting 20-40 meshes of silicon carbide, removing residual adhesive on the periphery of the slip teeth 104, and improving the effect of the slips 101 when being connected with a sleeve and improving the appearance quality of the slips 101.
Step 8, assembling the slip bowl 100, the slips 101, the cone 105, the expander 107 and the center tube 108 to form a bridge plug. Specifically, when the bridge plug is assembled, the expansion ring 107 is sleeved on the central tube 108, the cone 105 is screwed on the central tube 108, the expansion ring is tightly pressed, the slip 101 is placed on the other end of the cone 105, the first inner conical surface 103 is contacted with the second outer conical surface 106, the slip seat 100 is placed on the slip 101, alignment is carried out, and finally, alpha-ethyl cyanoacrylate glue is dripped between the first inner conical surface 103 and the second outer conical surface 106 and the contact surface circumference of the slip 101 and the slip seat 100, so that the slip seat 100, the slip 101 and the cone 105 are fixedly connected, and the bridge plug is formed with the expansion ring 107 and the central tube 108 which are fixedly arranged on the cone 105. Through the mode, the bridge plug becomes a whole when the bridge plug is put in, and the putting construction is convenient. The adopted alpha-cyanoacrylate glue is convenient for the slip 101 and the cone 105 to be separated when in sealing connection with the bridge plug and the sleeve, so that the cone 105 can move in the slip 101, and the bridge plug and the sleeve are convenient to be fixedly connected. The cone 105 and the central tube 108 are matched through fine threads, so that on one hand, connection and fixation of the cone 105 and the central tube are facilitated, on the other hand, when the bridge plug is fixed, the slips 101 and the sleeve are connected, when acting force is continuously applied to the bridge plug after the sleeve and the slips 101 are connected and fixed, the matched threads between the central tube 108 and the cone 105 are broken, deformation of the expansion ring 107 is finally realized, and sealing of the sleeve is finally realized.
Example 3
As shown in fig. 3-6, the present embodiment provides an inclined hole machining apparatus for machining an inclined hole in step 1 in embodiment 2, which includes a clamping mechanism, an azimuth adjusting mechanism, a height adjusting mechanism, a pitch adjusting mechanism, an inner pushing mechanism and a drilling mechanism, wherein the clamping mechanism is used for clamping and fixing the slips 101, the azimuth adjusting mechanism is arranged on the clamping mechanism and is used for adjusting the azimuth of the drilling mechanism, the drilling mechanism drills the inclined hole 110 on the outer wall of the slips 101, the height adjusting mechanism is arranged on the azimuth adjusting mechanism and is used for adjusting the height of the drilling mechanism, the drilling mechanism drills the inclined hole 110 at different heights of the slips 101, the pitch adjusting mechanism is arranged on the height adjusting mechanism and is used for adjusting the pitch angle of the drilling mechanism, the inner pushing mechanism is arranged on the pitch adjusting mechanism and is used for adjusting the distance between the drilling mechanism and the pitch adjusting mechanism, and the drilling mechanism is arranged on the inner pushing mechanism and is used for drilling the inclined hole 110, and the drilling depth of the drilling mechanism is controlled.
The operation steps of the implementation are that the slips 101 are sleeved on the clamping mechanism, and the slips 101 are fixed in a three-grip clamping and positioning mode; then the height adjustment of the drilling mechanism is realized through the height adjustment mechanism, and the drilling mechanism is positioned at the top end of the slip 101; then the inclination angle of the drilling mechanism is adjusted by a pitching adjusting mechanism according to the inclination angle of the processed inclined hole 110; then, the inner side end of the drilling mechanism is close to the outer wall of the slip 101 under the adjustment of the inner pushing mechanism; then drilling the inclined hole 110 by a drilling mechanism, and controlling the drilling depth of the inclined hole by the drilling mechanism; and then the azimuth adjustment of the drilling mechanism is carried out through the azimuth adjustment mechanism, and the drilling operation of a plurality of inclined holes is carried out at the same height through the drilling mechanism.
The inclined hole machining device reduces the difficulty of inclined hole machining, improves the automation degree and efficiency of inclined hole machining, and accordingly improves the production capacity of the slips 101.
The clamping mechanism comprises a base plate 200, Y-shaped holes 202 are formed in the base plate 200, four supporting legs 201 are arranged on the base plate 200, three sliding pieces 203 are arranged in the Y-shaped holes 202, an included angle formed between the moving directions of two adjacent sliding pieces 203 is 120 degrees, connecting rods are arranged at the lower ends of the sliding pieces 203, clamping pieces 204 are arranged at the upper ends of the sliding pieces 203, the outer walls of the clamping pieces 204 are arc-shaped structures, a pair of clamping bearing seats 205 are horizontally distributed on one side of the base plate 200, the clamping bearing seats 205 positioned on the inner side are arranged on the side wall of the base plate 200, a clamping motor 207 is arranged on the clamping bearing seats 205 positioned on the outer side, a pair of centering connecting plates 206 are arranged between the clamping bearing seats 205, clamping screw rods 208 are connected with output shafts of the clamping motor 207, clamping seats 209 are arranged on the clamping screw rods 208, a pair of clamping push plates 210 are inwards extended, the clamping pushing plates 210 are all penetrated through the clamping bearing seats 205 positioned at the inner sides, the mounting pieces 211 are arranged at the inner sides of the clamping pushing plates 210, the inner pushing transverse plates 216 are arranged on the mounting pieces 211, a pair of key-shaped holes are symmetrically formed at the two ends of the inner pushing transverse plates 216, the concave frames 212 are arranged on the clamping bearing seats 205 positioned at the inner sides, a first hinging seat 213 is arranged at one end of each concave frame 212, a second hinging seat 214 is arranged at the other end of each concave frame 212, the length of each first hinging seat 213 is shorter than that of each second hinging seat 214, the first hinging seat 213 and the second hinging seat 214 are hinged with L-shaped hinge plates 217, the L-shaped hinge plates 217 are mutually symmetrical, one ends of the L-shaped hinge plates 217 are hinged in the key-shaped holes through hinge rods, the other ends of the L-shaped hinge plates 217 are respectively arranged on a pair of mutually symmetrical connecting rods, the second hinging seats 214 are hinged with V-shaped hinge plates 218, the included angle formed by the V-shaped hinge plates 218 is obtuse angle, one end of the V-shaped hinge plate 218 is arranged on the unconnected connecting rod, the other end of the V-shaped hinge plate 218 is provided with a concave piece 219, the concave piece 219 is arranged on one end of the inner pushing transverse plate 216, a key hole 220 is formed in the concave piece 219, and the other end of the V-shaped hinge plate 218 is connected with the key hole 220 through a hinge shaft.
The gripping mechanism adjusts the position of the gripping seat 209 by means of the rotating gripping screw 208 and during gripping the gripping seat 209 moves inwards, whereupon the push-in cross plate 216 will move inwards with it, while the two L-shaped hinge plates 217 are rotated around the second hinge seat 214 and the first hinge seat 213 by means of the two key-shaped holes acting on the connecting rod, and by means of this rotation the two mutually symmetrical slide members 203 are moved outwards and by means of the gripping members 204 provided on the two slide members 203 act on the inner wall of the slip 101, while on the other hand when the push-in cross plate 216 moves inwards the upper end key-hole 220 of the female member 219 at one end will act on the hinge shaft, thus also rotating the V-shaped hinge plate 218 and causing the slide member 203 connected to the V-shaped hinge plate 218 to move outwards along the Y-shaped hole 202 and finally together completing the fixing of the slip 101 by means of the gripping members 204 provided on the slide member 203 and the two other gripping members 204 mentioned earlier. This kind of centre gripping fixed mode does not need the centering operation when slips 101 centre gripping, has reduced the degree of difficulty when slips 101 centre gripping, has improved the efficiency of centre gripping simultaneously to and the precision after the centre gripping, and then improve the precision of inclined hole 110 drilling, simultaneously owing to adopt the transmission mode of centre gripping lead screw 208, thereby improved the stability of centre gripping, and corresponding also conveniently adjust.
The azimuth adjusting mechanism comprises an azimuth adjusting driving seat 221 arranged on one side of the base plate 200, an azimuth driving motor 222 is arranged on the azimuth adjusting driving seat 221, an azimuth adjusting driving wheel 223 is connected with an output shaft of the azimuth driving motor 222, a toothed ring 224 is meshed with the azimuth adjusting driving wheel 223, a fixed inner ring 225 is arranged in the toothed ring 224, the fixed inner ring 225 is arranged on the base plate 200, a mounting base 226 is arranged on the toothed ring 224, an inward extending protruding plate 227 is arranged on the mounting base 226 in an inward extending mode, a limiting wheel 228 is arranged at the inner side end of the inward extending protruding plate 227, and the outer wall of the limiting wheel 228 is tangent with the inner wall of the fixed inner ring 225. When the mechanism is used for carrying out the azimuth adjustment of the drilling mechanism, the driving wheel 223 drives the toothed ring 224 to rotate, and in order to ensure the stability after rotation and improve the machining precision of the inclined hole 110, the driving motor 222 is a self-locking motor.
The height adjusting mechanism comprises a pair of lifting backboard 229 installed on the installation base 226, lifting holes are formed in the lifting backboard 229, a lifting bearing seat 230 is installed at the upper end and the lower end of the outer wall of one lifting backboard 229 respectively, a plurality of lifting guide rods 260 are arranged between the lifting bearing seats 230, a lifting motor 261 is installed on the lifting bearing seat 230 at the upper end, an output shaft of the lifting motor 261 is connected with a lifting screw rod 262, a lifting seat 263 is arranged on the lifting screw rod 262, and the inner side end of the lifting seat 263 penetrates through the lifting holes. The mechanism adopts a lifting screw rod 262 transmission mode to improve the adjusting precision and ensure the stability when the inclined hole 110 is processed.
The pitch adjusting mechanism comprises an inner rotating seat 231 arranged at the inner side end of a lifting seat 263, an outer rotating seat 233 is arranged in a lifting hole of the other lifting backboard 229, a rotating concave part 232 is arranged between the outer rotating seat 233 and the inner rotating seat 231, one end of the rotating concave part 232 is connected with a worm wheel 234, the worm wheel 234 is meshed with a worm 235, pitch seats 236 are arranged at two ends of the worm 235, one end of the worm 235 is connected with a pitch motor 237, and the pitch seats 236 are arranged on the outer rotating seat 233. The mechanism adopts a worm wheel 234 and a worm 235 to drive to adjust the pitching angle of the drilling mechanism, so that the accuracy and stability of drilling are improved.
The inner pushing mechanism comprises a pair of inner pushing bearing seats 238, a pair of inner pushing connecting plates 239 are arranged between the inner pushing bearing seats 238, the inner pushing bearing seats 238 positioned on the inner side are arranged on the rotating concave piece 232, the inner pushing bearing seats 238 positioned on the outer side are provided with inner pushing motors 240, the output shafts of the inner pushing motors 240 are connected with inner pushing screw rods 241, inner pushing seats 242 are arranged on the inner pushing screw rods 241, a pair of inner pushing plates 243 are arranged on the inner pushing seats 242 in an inward extending mode, the inner pushing plates 243 penetrate through the inner pushing bearing seats 238 positioned on the inner side, and inner pushing end plates 244 are arranged at the inner side ends of the inner pushing plates 243. When the position of the drilling mechanism is adjusted, the mechanism adopts a mode of driving the inner pushing screw rod 241, so that the stability and the accuracy of adjustment are ensured.
The drilling mechanism comprises an adjusting bottom plate 245 arranged on an inner pushing end plate 244, guide grooves 246 are formed in two sides of the adjusting bottom plate 245, an adjusting driving seat 247 is arranged at one end of the adjusting bottom plate 245, an adjusting motor 248 is arranged on the adjusting driving seat 247, an adjusting driving wheel 249 is connected with an output shaft of the adjusting motor 248, an adjusting driven wheel 250 is meshed with the adjusting driving wheel 249, an adjusting wire sleeve 251 is arranged in the adjusting driven wheel 250, an adjusting swivel base 252 is arranged on the adjusting wire sleeve 251, an adjusting screw 253 is arranged in the adjusting wire sleeve 251, an adjusting seat 254 is arranged at the inner side end of the adjusting screw 253, limit side plates 255 are arranged on two sides of the adjusting seat 254, limit side plates 255 are sleeved in the guide grooves 246 in an inlaid mode, a folding fixing piece 256 is arranged on the adjusting seat 254, a drilling motor 257 is arranged on the folding fixing piece 256, and the output shaft of the drilling motor 257 is connected with a drilling tool. The drilling blade in the mechanism is driven by the drilling motor 257 to rotate, and the drilling operation is performed by the drilling blade. And the feeding of the drilling tool adopts a mode of transmission of the adjusting screw 253, so that the feeding control precision is improved, and the limiting side plate 255 and the guide groove 246 play a role in limiting and guiding the adjustment of the adjusting seat 254.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the invention, and it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (7)
1. A method of assembling a bridge plug, characterized by being used for the assembly of said bridge plug;
The bridge plug comprises a slip seat (100), slips (101), a cone (105), an expanding ring (107) and a central tube (108);
the slips (101) are arranged at one end of the slip seat (100);
The cone (105) is arranged at the other end of the slip (101);
The expansion ring (107) is sleeved on the central tube (108) and is arranged between the cone (105) and the central tube (108);
the central tube (108) is connected in the cone (105) in a threaded fit manner;
the outer wall of the slip (101) is embedded with a plurality of slip teeth (104);
A first inner conical surface (103) is formed at one end of the slip (101) assembled with the cone (105), and a second inner conical surface (102) is continuously formed at the inner side end of the first inner conical surface (103);
One end of the cone (105) assembled with the slip (101) is formed with a first outer conical surface, and the inner side end of the first outer conical surface is continuously formed with a second outer conical surface (106);
the inclination angle of the second inner conical surface (102) is consistent with that of the second outer conical surface (106), and the inclination angle of the first inner conical surface (103) is consistent with that of the first outer conical surface;
The inner wall of the expansion ring (107) is of an arc-shaped structure, and the expansion ring (107) is made of red copper;
The method comprises the following steps:
step1, machining an inclined hole (110) on a slip (101) through an inclined hole machining device (2);
Step 2, carrying out sand blasting treatment on the inclined hole (110) obtained in the step1 by adopting silicon carbide, and obtaining a roughened inner wall (111);
carrying out sand blasting on the slip teeth (104) by adopting silicon carbide, and coarsening the outer wall of the slip teeth (104);
Step 3, spraying a polyurethane binder on the roughened inner wall (111) obtained in the step 2;
Step 4, placing the slips (101) in an oven to harden the adhesive preliminarily;
Step 5, the slip teeth (104) obtained in the step 2 are knocked into the inclined holes (110);
step 6, placing the slips (101) in an oven to bond and fix the slip teeth (104);
step 7, carrying out sand blasting treatment on the slips (101) by adopting silicon carbide, and removing residual adhesive on the periphery of the slip teeth (104);
step 8, assembling a slip seat (100), a slip (101), a cone (105), an expanding ring (107) and a central tube (108) to form a bridge plug;
Wherein, the inclined hole processing device (2) comprises a clamping mechanism, an azimuth adjusting mechanism, a height adjusting mechanism, a pitching adjusting mechanism, an inward pushing mechanism and a drilling mechanism;
The clamping mechanism is used for clamping and fixing the slips (101);
The azimuth adjusting mechanism is arranged on the clamping mechanism and is used for azimuth adjustment of the drilling mechanism, and the drilling mechanism drills inclined holes (110) on the outer wall of the slips (101);
The height adjusting mechanism is arranged on the azimuth adjusting mechanism and is used for adjusting the height of the drilling mechanism so that the drilling mechanism drills inclined holes (110) at different heights of the slips (101);
The pitching adjusting mechanism is arranged on the height adjusting mechanism and is used for adjusting the pitching angle of the drilling mechanism and adjusting the inclination angle of the drilling inclined hole (110);
the inner pushing mechanism is arranged on the pitching adjusting mechanism and is used for spacing between the drilling mechanism and the pitching adjusting mechanism;
the drilling mechanism is arranged on the inner pushing mechanism and is used for drilling the inclined hole (110) and controlling the drilling depth;
The clamping mechanism comprises a base plate (200), Y-shaped holes (202) are formed in the base plate (200), four supporting feet (201) are arranged on the base plate (200), three sliding pieces (203) are arranged in the Y-shaped holes (202), an included angle formed between the moving directions of two adjacent sliding pieces (203) is 120 degrees, connecting rods are arranged at the lower ends of the sliding pieces (203), clamping pieces (204) are arranged at the upper ends of the sliding pieces (203), the outer walls of the clamping pieces (204) are arc-shaped structures, a pair of clamping bearing seats (205) are horizontally distributed on one side of the base plate (200), the clamping bearing seats (205) positioned at the inner sides are arranged on the side wall of the base plate (200), clamping motors (207) are arranged on the clamping bearing seats (205) positioned at the outer sides, a pair of connecting plates (206) are arranged between the clamping bearing seats (205), clamping screw rods (208) are connected with output shafts of the clamping screws (209), a pair of clamping push plates (210) are arranged on the clamping screw rods (208) in an inward extending mode, the clamping bearing seats (205) are penetrated through the clamping bearing seats (205) positioned at the inner sides, the clamping bearing seats (205) are arranged at the inner sides, the two side faces of the clamping plates (211) are symmetrically arranged at the inner sides, and the two inner side faces (216) are arranged at the two inner side faces of the clamping plates (216) respectively, the clamping bearing seat (205) positioned at the inner side is provided with a concave frame (212), one end of the concave frame (212) is provided with a first hinging seat (213), the other end of the concave frame (212) is provided with a second hinging seat (214), the length of the first hinging seat (213) is shorter than that of the second hinging seat (214), the first hinging seat (213) and the second hinging seat (214) are hinged with L-shaped hinging plates (217), the L-shaped hinging plates (217) are mutually symmetrical, one ends of the L-shaped hinging plates (217) are hinged in key holes through hinging rods, the other ends of the L-shaped hinging plates (217) are arranged on a pair of mutually symmetrical connecting rods, the second hinging seat (214) is hinged with V-shaped hinging plates (218), an included angle formed by the V-shaped hinging plates (218) is an obtuse angle, one end of each V-shaped hinging plate (218) is arranged on an unconnected connecting rod, the other end of each V-shaped hinging plate (218) is provided with a concave piece (219), each concave piece (219) is arranged on one end of each inner pushing transverse plate (216), each concave piece (219) is provided with a hole (220), and the other end of each V-shaped hinging plate (218) is connected with the key holes (220) through hinging shafts;
the azimuth adjusting mechanism comprises an azimuth adjusting driving seat (221) arranged on one side of the base plate (200), an azimuth driving motor (222) is arranged on the azimuth adjusting driving seat (221), an azimuth adjusting driving wheel (223) is connected with an output shaft of the azimuth driving motor (222), a toothed ring (224) is meshed with the azimuth adjusting driving wheel (223), a fixed inner ring (225) is arranged in the toothed ring (224), the fixed inner ring (225) is arranged on the base plate (200), an installation base (226) is arranged on the toothed ring (224), an inward extending convex plate (227) is arranged on the installation base (226) in an inward extending mode, a limiting wheel (228) is arranged at the inner side end of the inward extending convex plate (227), and the outer wall of the limiting wheel (228) is tangent with the inner wall of the fixed inner ring (225);
The height adjusting mechanism comprises a pair of lifting back plates (229) arranged on an installation base (226), lifting holes are formed in the lifting back plates (229), lifting bearing seats (230) are respectively arranged at the upper end and the lower end of the outer wall of one lifting back plate (229), a plurality of lifting guide rods (260) are arranged between the lifting bearing seats (230), a lifting motor (261) is arranged on the lifting bearing seat (230) at the upper end, a lifting screw rod (262) is connected with an output shaft of the lifting motor (261), a lifting seat (263) is arranged on the lifting screw rod (262), and the inner side end of the lifting seat (263) penetrates through the lifting holes;
The pitching adjusting mechanism comprises an inner rotating seat (231) arranged at the inner side end of a lifting seat (263), an outer rotating seat (233) is arranged in a lifting hole of the other lifting backboard (229), a rotary concave part (232) is arranged between the outer rotating seat (233) and the inner rotating seat (231), one end of the rotary concave part (232) is connected with a worm wheel (234), the worm wheel (234) is meshed with a worm (235), pitching seats (236) are arranged at two ends of the worm (235), one end of the worm (235) is connected with a pitching motor (237), and the pitching seats (236) are arranged on the outer rotating seat (233);
the inner pushing mechanism comprises a pair of inner pushing bearing blocks (238), a pair of inner pushing connecting plates (239) are arranged between the inner pushing bearing blocks (238), the inner pushing bearing blocks (238) positioned at the inner sides are arranged on the rotating concave parts (232), the inner pushing bearing blocks (238) positioned at the outer sides are provided with inner pushing motors (240), the output shafts of the inner pushing motors (240) are connected with inner pushing screw rods (241), the inner pushing screw rods (241) are provided with inner pushing blocks (242), the inner pushing blocks (242) are internally provided with a pair of inner pushing plates (243) in an extending mode, the inner pushing plates (243) penetrate through the inner pushing bearing blocks (238) positioned at the inner sides, and inner pushing end plates (244) are arranged at the inner side ends of the inner pushing plates (243);
The drilling mechanism comprises an adjusting bottom plate (245) arranged on the inner pushing end plate (244), guide grooves (246) are formed in two sides of the adjusting bottom plate (245), an adjusting driving seat (247) is arranged at one end of the adjusting bottom plate (245), an adjusting motor (248) is arranged on the adjusting driving seat (247), an output shaft of the adjusting motor (248) is connected with an adjusting driving wheel (249), the adjusting driving wheel (249) is meshed with an adjusting driven wheel (250), an adjusting screw sleeve (251) is arranged in the adjusting driven wheel (250), an adjusting swivel mount (252) is arranged on the adjusting screw sleeve (251), an adjusting screw rod (253) is arranged in the adjusting bottom plate (245), an adjusting seat (254) is arranged at the inner side end of the adjusting screw rod (253), limit side plates (255) are arranged on two sides of the adjusting seat (254), the limit side plates (255) are sleeved in the guide grooves (246), a folding fixing piece (256) is arranged on the folding fixing piece (256), and the output shaft of the drilling motor (257) is connected with a drilling cutter.
2. The bridge plug assembly method according to claim 1, wherein the slip teeth (104) are of cylindrical structure and made of tungsten-cobalt alloy, the slip teeth (104) are obliquely arranged on the slip (101), and an included angle formed between the axial direction of the slip teeth (104) and the radial direction of the slip (101) is 5-10 degrees.
3. The method of assembling a bridge plug according to claim 1, wherein the taper of the first internal conical surface (103) is 30-45 degrees;
The taper of the second inner conical surface (102) is 5-10 degrees.
4. The method of assembling a bridge plug according to claim 1, wherein 20-40 mesh silicon carbide is used to blast the inner wall of the inclined bore (110), the outer wall of the slip teeth (104), the outer wall of the slip (101).
5. The method of assembling a bridge plug according to claim 1, wherein the baking temperature in step 4 is 50 ℃ to 60 ℃ and the baking time is 30 minutes.
6. The method for assembling a bridge plug according to claim 1, wherein the baking temperature in the step 6 is 100-120 ℃, the baking time is 90min, and the bridge plug is cooled by natural cooling after the baking.
7. The method for assembling the bridge plug according to claim 1, wherein the step 8 is performed by first sleeving the expander (107) on the center tube (108);
Screwing the cone (105) into the central tube (108) and compacting the expander;
then placing the slips (101) on the other end of the cone (105), and contacting the first inner cone (103) with the second outer cone (106);
placing the slip seat (100) on the slip (101) and aligning;
Finally, alpha-ethyl cyanoacrylate glue is dripped between the first inner conical surface (103) and the second outer conical surface (106) and the contact surface circumference of the slips (101) and the slip seat (100), so that the slip seat (100), the slips (101) and the cone (105) are fixedly connected, and a bridge plug is formed by the slips, the expansion ring (107) and the central tube (108) which are fixed on the cone (105).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210085791.7A CN114607315B (en) | 2022-01-25 | 2022-01-25 | Bridge plug and assembling method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210085791.7A CN114607315B (en) | 2022-01-25 | 2022-01-25 | Bridge plug and assembling method thereof |
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| CN114607315B true CN114607315B (en) | 2024-05-28 |
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| CN215169884U (en) * | 2021-06-08 | 2021-12-14 | 长江大学 | Special coating film short bridge plug for fracturing of marlite reservoir |
| CN113881375A (en) * | 2021-10-08 | 2022-01-04 | 成都托克密封件有限责任公司 | Slip coating and preparation method thereof, slip and soluble bridge plug |
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| US8579024B2 (en) * | 2010-07-14 | 2013-11-12 | Team Oil Tools, Lp | Non-damaging slips and drillable bridge plug |
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| WO2016101374A1 (en) * | 2014-12-26 | 2016-06-30 | 杰瑞能源服务有限公司 | Bridge plug having large drift diameter and setting method thereof |
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| CN113881375A (en) * | 2021-10-08 | 2022-01-04 | 成都托克密封件有限责任公司 | Slip coating and preparation method thereof, slip and soluble bridge plug |
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| CN114607315A (en) | 2022-06-10 |
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