CN114135238A - Slip and preparation method thereof - Google Patents

Abstract

The invention provides a slip and a preparation method thereof, comprising the following steps: the slip comprises a slip body and a slip body, wherein the slip body is provided with an assembling surface, and the assembling surface is provided with a plurality of bulges; the attachment structure is partially or completely attached to the assembly surface of the slip body and is formed by mixing an adhesive and metal particles; a finish partially or completely covering the attachment structure. The slip has the advantages that the slip hardness and the engagement strength attached to the shaft or the inner wall of the casing can be improved, meanwhile, the damage to the shaft or the inner wall of the casing during engagement is greatly reduced, the structure is simple, the preparation is easy, and the implementation and popularization are facilitated.

Description

Slip and preparation method thereof

Technical Field

The invention relates to the technical field of oil drilling, in particular to a slip and a preparation method thereof.

Background

In the field of oil drilling technology, fracturing operations are required. In the fracturing process, a fracturing tool, such as a bridge plug, a sliding sleeve, a divider and the like, needs to be used and is fixed through slips. In order to facilitate the drift diameter of the shaft, slips are generally made of soluble materials so as to facilitate the dissolution of liquid in the well and realize the drift diameter. However, the method has the problem of low hardness of the slips, which is not favorable for the slips to be attached to the inner wall of a well bore in use. In the prior art, the adhesion strength is improved by arranging the cylindrical protrusion on the surface of the slip, which is in contact with the shaft, although the adhesion strength is improved.

The column protrusion in the prior art can form obvious occlusion traces on the inner wall of a shaft or a casing, and damage is caused to the inner wall of the shaft or the inner wall of the casing. Accordingly, there is a need for a slip that provides improved adhesion to the desired gripping strength while minimizing damage to the inner wall or casing.

Disclosure of Invention

In view of the problems in the prior art, the invention provides the slip and the preparation method thereof, which can improve the hardness of the slip and the engagement strength of the slip attached to the inner wall of the shaft or the casing, greatly reduce the damage to the inner wall of the shaft or the casing during engagement, have simple structure and easy preparation, and are beneficial to implementation and popularization.

According to one aspect of the invention, there is provided a slip comprising: the slip comprises a slip body and a slip body, wherein the slip body is provided with an assembling surface, and the assembling surface is provided with a plurality of bulges; the attaching structure is attached to part or all of the assembling surface and comprises an adhesive and metal particles; and the paint surface covers part or all of the attachment structure.

According to some embodiments of the invention, the plurality of protrusions comprises laterally disposed bar-shaped protrusions; preferably, the assembling surface is provided with a plurality of transverse strip-shaped bulges, and strip-shaped triangular grooves are formed between the adjacent strip-shaped bulges.

Further, a groove face of the strip-shaped triangular groove is a vertical face protruding in the front strip shape, another groove face is an inclined face protruding in the rear strip shape, the included angle between the two groove faces is 30-60 degrees, and further, the included angle between the two groove faces is 60 degrees.

Furthermore, still further, the assembly face of the slip body has at least two mounting grooves for mounting the slip.

According to some embodiments of the invention, the width of the top surface of the strip-shaped protrusion is 1/10-2/5, preferably 1/10-1/5, more preferably 1/10 of the width of the top notch of the strip-shaped triangular groove; and/or the height of the strip-shaped protrusions is 1-2 mm, preferably 1-1.5 mm, and more preferably 1-1.3 mm.

According to some embodiments of the invention, the attachment structure fills the bar-shaped triangular groove and is 0.2-2 mm higher than the top surface of the bar-shaped protrusion; and/or the thickness of the attachment structure is 0.3-1 mm, preferably 0.3-0.5 mm, and more preferably 0.4-0.5 mm; and/or the volume ratio of the adhesive to the metal particles is 1-2, preferably 1-1.5, and more preferably 1.3-1.5.

According to some embodiments of the invention, the adhesive comprises a cyanoacrylate, preferably ethyl cyanoacrylate; and/or the metal particles comprise tungsten-cobalt alloy particles, preferably YG8 tungsten-cobalt alloy particles; the particle size of the tungsten-cobalt alloy particles is 0.5-2 mm, preferably 0.5-1 mm, and more preferably 0.5-0.8 mm.

According to some embodiments of the invention, the finish comprises one or more of an acrylic paint, a polyurethane paint, an epoxy paint, a phenolic paint; and/or the thickness of the paint surface is 0.02-0.05 mm, preferably 0.02-0.03 mm, and more preferably 0.03 mm.

According to another aspect of the invention, there is provided a method of preparing slips as described above, comprising the steps of:

step a), applying an adhesive and metal particles to an assembly surface of a slip body to form an adhesive-metal particle mixed layer;

furthermore, the adhesive and the metal particles can be distributed and paved, or the adhesive and the metal particles are mixed in advance and paved;

step b) baking the slips with the adhesive-metal particle mixed layer prepared in the step a);

and c) cooling the slips baked in the step b), and spraying a paint surface.

According to some embodiments of the invention, said step a) comprises: coating an adhesive on the assembling surface of the slip body, and paving metal particles on the adhesive; immersing adhesive in gaps for laying metal particles; and after the adhesive-metal particle mixed layer is formed, standing at normal temperature for 20-45 minutes.

According to some embodiments of the invention, said step a) further comprises: the assembly surface of the slip body is provided with a plurality of transverse strip-shaped protrusions, triangular grooves are formed between every two adjacent strip-shaped protrusions, two groove surfaces of each triangular groove are coated with an adhesive, metal particles are laid in each triangular groove, and the slip body is placed at normal temperature for 2-10 minutes; and continuously coating the adhesive on the top surface of each strip-shaped protrusion and the triangular groove on which the metal particles are already laid, laying the metal particles on the adhesive again, and standing at normal temperature for 20-45 minutes.

According to some embodiments of the invention, the adhesive in step a) comprises a cyanoacrylate, preferably ethyl cyanoacrylate; and/or the metal particles comprise tungsten-cobalt alloy particles, preferably YG8 tungsten-cobalt alloy particles; the particle size of the tungsten-cobalt alloy particles is 0.5-2 mm; and/or the paint surface comprises one or more of acrylic paint, polyurethane paint, epoxy resin paint and phenolic paint.

According to some embodiments of the invention, the baking temperature in step b) is 90 ℃ to 150 ℃ and the baking time is 60 to 120 minutes.

According to some embodiments of the invention, the method of preparing slips of the invention further comprises:

step d) carrying out normal-temperature air drying or baking on the paint surface formed in the step c);

wherein the normal-temperature air drying time is 1-3 hours; or the baking time is 20-45 minutes, and the temperature is 70-90 ℃.

The invention has the beneficial effects that:

(1) according to the invention, the slip formed by preparing the attachment structure formed by the adhesive and the metal particles and spraying the paint surface can effectively improve the hardness of the slip assembly surface, improve the engaging force between the slip and the inner wall of the casing or the shaft after the slip is assembled and applied, and realize effective engagement.

Furthermore, the acrylic resin paint can further fill the gaps between the YG 8W-Co alloy particles, and further protect the surface of the mixed layer formed by the ethyl cyanoacrylate and the YG 8W-Co alloy particles, so as to prevent the metal particles from falling off and causing unnecessary pollution or loss in the slip using process.

(2) Compared with the cylindrical protrusion mode in the prior art, the slip disclosed by the invention has the advantages that the damage to the inner wall of the casing or the shaft is greatly reduced, and the purpose of effectively protecting the casing or the shaft can be achieved.

(3) The front surface of the slip is arranged in a mode of array strip-shaped protrusions, strip-shaped triangular grooves are formed, the slip coating is formed on the structure, the strip-shaped triangular grooves are filled firstly, then the filled strip-shaped triangular grooves and the top surfaces of the strip-shaped protrusions are filled again, and the adhesion effect of the slip coating and the front surface of the slip can be ensured through the matching of the structure and the filling mode.

Drawings

FIG. 1A is a photograph of a slip object according to an exemplary embodiment of the present invention;

FIG. 1B is a schematic cross-sectional view of the slip of FIG. 1A taken along section line A-A;

FIG. 2 is a schematic illustration of a slip body construction according to an exemplary embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view of slips according to an exemplary embodiment of the invention;

FIG. 4 is a flow diagram of a method of preparing slips according to an exemplary embodiment of the invention;

FIG. 5 is a schematic view of a uniform filling apparatus used in an exemplary embodiment of the present invention;

FIG. 6 is an enlarged view of a portion A of FIG. 5;

FIG. 7 is a schematic view of another perspective structure of a uniform filling apparatus used in an exemplary embodiment of the present invention;

FIG. 8 is an enlarged view of a portion B shown in FIG. 7;

FIG. 9 is a top view of a preferred embodiment of a uniform filling apparatus used in exemplary embodiments of the present invention;

FIG. 10A is a photograph of an assembled prior art slip;

FIG. 10B is a pictorial photograph of an assembled slip of an exemplary embodiment of the present invention;

FIG. 11 is a photograph and a partially enlarged photograph of damage to a casing caused by slips of the prior art;

FIG. 12 is a photograph and a partially enlarged photograph of damage to a casing by slips according to an exemplary embodiment of the present invention;

description of reference numerals:

100 slip body

101 is convex

102 attachment structure

104 painted surface

206 mounting groove

301 strip-shaped projection

303 bar-shaped triangular groove

305 metallic particles

306 adhesive

4 even filling device

41 mesh plate and 42 fixing plate

51 fixed partition, 52 groove filling area and 52 top surface filling

61 movable partition plate, 62 push plate and 63 horizontal pushing cylinder

7 straight line mechanism

70 moving rod, 71 motor, 72 guide rail, 73 sliding groove, 74 screw rod, 75 groove area material catching plate, 76 through hole, 77 guide rod and 78 baffle plate

8 lifting plate

81 top surface driving material plate, 82 fixing rod and 83 vertical cylinder

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

FIG. 1A is a photograph of a slip object according to an exemplary embodiment of the present invention.

As shown in fig. 1A, according to an exemplary embodiment of the present invention, there is provided a slip for use in the field of oil drilling having a strong hardness and strength to be adhered to an inner wall of a wellbore or a casing.

FIG. 1B is a schematic cross-sectional view of the slip shown in FIG. 1A along section line A-A.

As shown in FIG. 1B, the slip according to an exemplary embodiment of the present invention includes a slip body 100, an attachment structure 102 and a paint surface 104. The mounting face is provided with a plurality of projections 101. The attachment structure 102 is partially or completely attached to the assembly surface of the slip body 100 and is formed by mixing an adhesive and metal particles. The finish 104, partially or completely covers the attachment structure 102.

According to some embodiments, the slips with the attachment structure and the painted surface provided by the invention have high slip assembly surface hardness, and effective engagement is realized after the casing or the inner wall of a well bore is matched.

FIG. 2 is a schematic illustration of a slip body construction according to an exemplary embodiment of the present invention.

As shown in fig. 2, the slip body 100 has at least one mounting groove 206 on the assembly face for mounting the slips according to some embodiments of the invention. The plurality of protrusions 101 of the slip body 100 include laterally disposed bar-shaped protrusions. In some embodiments, the setting surface of the slip body 100 is provided with a plurality of laterally disposed, bar-shaped protrusions.

FIG. 3 is a schematic cross-sectional view of slips according to an exemplary embodiment of the invention.

As shown in fig. 3, according to some embodiments of the present invention, the slip body 100 is provided at the setting surface thereof with a plurality of laterally arranged bar-shaped protrusions 301, and bar-shaped triangular grooves 303 are formed between the adjacent bar-shaped protrusions 301. In some embodiments, one groove surface of the strip-shaped triangular groove 303 is a vertical surface of a previous strip-shaped protrusion, the other groove surface is an inclined surface of a next strip-shaped protrusion, and an included angle between the two groove surfaces is 30-60 degrees. In a preferred embodiment of the invention the angle between the two groove surfaces is 60.

Referring to FIG. 3, according to some embodiments, the width a of the top surface of the bar-shaped protrusion 301 is 1/10-2/5, preferably 1/10-1/5, and more preferably 1/10 of the width b of the top notch of the bar-shaped triangular groove 303. According to other embodiments, the height c of the strip-shaped protrusion 101 or the strip-shaped protrusion 301 is 1-2 mm, preferably 1-1.5 mm, and more preferably 1-1.3 mm.

As shown in FIG. 3, according to an exemplary embodiment, the attachment structure fills the strip-shaped triangular groove 303 and is 1-2 mm, preferably 1-1.5 mm, and more preferably 1-1.3 mm higher than the top surface of the strip-shaped protrusion. According to some embodiments of the present application, the thickness of the attachment structure is 0.3 to 1mm, preferably 0.3 to 0.5mm, and more preferably 0.4 to 0.5 mm. In some embodiments, the volume ratio of the adhesive 306 to the metal particles 305 is 1 to 2, preferably 1 to 1.5, and more preferably 1.3 to 1.5.

As shown in fig. 3, according to some embodiments, the adhesive 306 includes cyanoacrylate. In some embodiments, the adhesive 306 is ethyl cyanoacrylate.

According to an exemplary embodiment, the metal particles 305 include tungsten-cobalt alloy particles. In some embodiments, the metal particles are YG8 tungsten cobalt alloy particles. The particle size of the tungsten-cobalt alloy particles is 0.5-2 mm, preferably 0.5-1 mm, and more preferably 0.5-0.8 mm.

According to some embodiments, the finish 104 includes one or more of an acrylic paint, a polyurethane paint, an epoxy paint, and a phenolic paint. According to an exemplary embodiment, the thickness of the finish is 0.02 to 0.05mm, preferably 0.02 to 0.03mm, more preferably 0.03 mm.

According to the exemplary embodiment, the slip assembling surface is provided with the transverse strip-shaped protrusions and the triangular grooves are formed, the slip coating is formed on the structure, the strip-shaped triangular grooves are filled firstly, then the filled strip-shaped triangular grooves and the top surfaces of the strip-shaped protrusions are filled again, the adhesion effect of the slip coating and the front surface of the slip can be ensured through the matching of the structure and the filling mode, and meanwhile, the slip is obtained through the structure and the mode, so that the adhesion strength with a casing or the inner wall of a shaft can be improved when the slip is assembled and applied.

FIG. 4 is a flow chart of a method of preparing slips according to an exemplary embodiment of the present invention.

Referring to fig. 4, according to an exemplary embodiment, an adhesive is coated on an assembly surface of a slip body at the slip body and metal particles are laid on the adhesive to form an adhesive-metal particle mixed layer S401. Then, the process proceeds to S402.

In S402, the adhesive 306 is immersed into the gaps where the metal particles 305 have been laid, so as to ensure that the adhesive 306 is present between the metal particles 305, and after the adhesive-metal particle mixed layer is formed, the mixture is placed at room temperature for 20 to 45 minutes.

In S403, the slip with the adhesive-metal particle mixed layer is baked. And then proceeds to S405.

In S404, the baked slips are cooled and painted. Then, the process proceeds to step S405.

In S405, the painted surface formed in S404 is air-dried or baked at normal temperature.

In some embodiments, step S401 may be further specifically divided into the following steps:

in S4011, coating adhesives 306 on two groove surfaces of each strip-shaped triangular groove 303, uniformly paving metal particles 305 in each strip-shaped triangular groove 303, and directly entering the next step, namely directly entering the step S402; or standing for about 2-10 min at normal temperature and entering the next step. And then transferred to S4012.

In S4012, an adhesive 306 is applied on the top surface including the bar-shaped protrusions 301 and the bar-shaped triangular grooves 303 on which the metal particles 305 have been already laid, and the metal particles 305 are continuously laid on the adhesive 306 applied again, and the mixture is left at room temperature for 30 min.

Further, in some embodiments, some experimental pieces show that the process efficiency can be improved by directly entering step S402 from S4011, but when the adhesive 306 is applied again, a certain disturbance is caused to the metal particles 305 and the adhesive 306 that have been filled in the bar-shaped triangular groove 303. In some embodiments, in step S4011, the test piece is placed at room temperature for 2min to 10min, which does not substantially occur, and only when the placement time is less than or equal to 2min, the coated metal particles 305 and the adhesive 306 are not substantially affected except a few disturbances.

In addition, in step S401, the adhesive 306 may be applied by brushing, and the metal particles 305 are manually or mechanically uniformly spread on the adhesive 306, and are uniformly adjusted by the brush body during spreading.

Further, for the purpose of uniform deposition effect of the metal particles 305 and increasing the deposition speed, it is preferable that the deposition of the metal particles 305 in S4011 and S4012 is performed by using the uniform filling apparatus 4 shown in fig. 5 to 9.

Fig. 5 is a schematic view of a uniform filling apparatus used in an exemplary embodiment of the present invention.

Referring to fig. 5, according to some embodiments, the uniform filling device 4 includes a mesh plate 41 and a fixing plate 42 spliced together, the mesh plate 41 having uniformly arranged meshes. The aperture of the mesh is exemplified by metal particles 305 with a particle diameter of 2mm, a plurality of fixed partition plates 51 are arranged on the mesh plate 41, a plurality of movable partition plates 61 are arranged on the fixed plate 42, and the movable partition plates 61 and the fixed partition plates 51 are arranged in a one-to-one correspondence manner and are matched in height. Fixed baffle 51 is cut apart into mesh board 41 and is distinguished 52 and top surface filling area 53 in the groove, and 52 width in groove filling area matches with the top mouth width of bar-shaped triangular groove 303, but slightly is less than the top mouth width of bar-shaped triangular groove 303, and top surface filling area 53 matches with the protruding 301's of bar-shaped top surface width, but slightly is less than the protruding 301's of bar-shaped top surface width, and the adjacent interval in groove filling area 52 and top surface filling area 53 sets up, is the arranging in mesh board 41 of array. Both the slot fill area 52 and the top fill area 53 have a uniform arrangement of mesh openings therein. The rear ends of the movable partition boards 61 are connected to the push plates 62, and the push plates 62 are connected with a pile of horizontal pushing cylinders 63 for pushing the push plates 62 and the movable partition boards 61. The linear mechanism 7 is arranged on two sides of the fixed plate 42, and the running direction of the linear mechanism 7 is parallel to the length direction of the movable partition plate 61.

Fig. 7 is a schematic view of another perspective structure of a uniform filling apparatus used in an exemplary embodiment of the present invention.

Referring to fig. 7, according to some embodiments, the linear mechanism 7 includes a guide rail 72 and a connection motor 71.

Fig. 6 is a partially enlarged view of a shown in fig. 5.

Fig. 8 is a partial enlarged view of B shown in fig. 7.

Referring to fig. 8, according to an exemplary embodiment, the linear mechanism 7 includes a lead screw 74 provided to the slide groove 73 of the guide rail 72, the lead screw 74 being connected to the motor 71. The screw rod 74 is threaded with a moving rod 70, the moving rod 70 is connected with a plurality of groove area material driving plates 75, and the groove area material driving plates 75 are positioned between adjacent movable partition plates 61 and are positioned in the area corresponding to the groove filling area 52.

As shown in fig. 6 and 8, according to an exemplary embodiment, the moving rod 70 is provided with a plurality of through holes 76 and a pair of guide rods 77, the guide rods 77 are sleeved with the lifting plate 8, the top of the guide rods 77 is provided with a fixed rod 82, the fixed rod 82 is provided with a pair of vertical cylinders 83, the movable ends of the vertical cylinders 83 are connected with the lifting plate 8, the lifting plate 8 is provided with a plurality of top surface material expelling plates 81, and the top surface material expelling plates 81 are correspondingly located above the through holes 76, as shown in fig. 6, which is a partial enlarged view of a shown in fig. 5. After the lifting plate 8 is lowered by the vertical cylinder 83, the bottom surface of the top-surface-region material-driving plate 81 is matched with the bottom surface of the groove-region material-driving plate 75, spaces through which the movable partition 61 passes are formed in the two sides of the top-surface-region material-driving plate 81, and spaces through which the movable partition 61 passes are also formed in the two sides of the groove-region material-driving plate 75.

FIG. 9 is a top view of a preferred embodiment of a uniform filling apparatus used in an exemplary embodiment of the present invention.

As shown in fig. 9, according to the exemplary embodiment, as a preferable mode of the uniform filling apparatus 4, a shielding plate 78 is connected to the movable rod 70, the bottom surface of the shielding plate 78 is matched with the movable partition and the top surface of the fixed partition 51, the shielding plate 78 is used for preventing the metal particles from overflowing from the region between the movable partitions or between the fixed partitions 51 to both sides from the upper direction during the pushing process when the movable rod 70 moves, and the metal particles between the movable partitions and between the fixed partitions 51 can be confined in the strip-shaped region where the metal particles are located together with the groove region material-removing plate 75 and/or the top surface region material-removing plate 81, and the metal particles do not overflow to both sides during the pushing process. The size of the shielding plate 78 is set according to the amount of metal particles prepared on the fixing plate 42. If the thickness of the metal particles is not high after the metal particles are scraped, the shielding plate 78 may be shorter, and conversely, the shielding plate may be longer.

In some embodiments, based on the uniform filling device, after the adhesive 306 is applied to the two groove surfaces of each of the strip-shaped triangular grooves 303 in step S401, the metal particles 305 may be laid according to the following steps:

s401 a: the slip body 100 with two groove surfaces of each strip-shaped triangular groove 303 coated with the adhesive 306 is arranged below the mesh plate 41 and has a smaller distance with the mesh plate 41, the strip-shaped triangular groove 303 corresponds to the groove filling area 52, and the strip-shaped protrusion 301 corresponds to the top surface filling area 53.

Specifically, can set up slips body 100 in an upgrading mechanism top, when smearing gluing agent 306, descending elevating system conveniently pulls open the distance with mesh board 41, for scribbling gluing agent 306 provides operating space, scribbles the back, rises elevating system, rises slips body 100 to have preset packing interval department with mesh board 41.

S401 b: the movable partition 61 is in a recovery state, a material containing area is formed on the fixed plate 42, and the metal particles 305 to be filled are placed on the fixed plate 42 and scraped off, so that the metal particles 305 are uniformly distributed on the fixed plate 42.

S401 c: then, the pushing plate 62 and the movable partition 61 are pushed by the horizontal pushing cylinder 63, so that the movable partition 61 moves forward to contact with the fixed partition 51, at this time, the movable partition 61 partitions the metal particles 305 on the fixed plate 42, the metal particles 305 are located between two adjacent movable partitions 61, and the partitioned metal particles 305 correspond to the groove filling area 52 and the top surface filling area 53 respectively.

S401 d: the elevating plate 8 and the top surface area repelling plate 81 are maintained in the raised position by the vertical air cylinder 83, and the top surface area repelling plate 81 is temporarily located at a height where it can contact the metal particles 305.

S401 e: the motor 71 of the linear mechanism 7 rotates to drive the screw rod 74 to rotate, so that the moving rod 70 can move along the length direction of the moving screw rod 74, the groove area material expelling plate 75 is used for pushing the metal particles 305 in the area where the moving rod is located to the mesh plate 41, the movable partition plate 61 is already abutted to the fixed partition plate 51, so that the metal particles 305 in the area limited by the movable partition plate 61 and the fixed partition plate 51 cannot be pushed to other areas, the groove area material expelling plate 75 can push the metal particles 305 in the area where the moving rod is located to the groove filling area 52 and continue to push on the groove filling area 52 until the metal particles are pushed to the tail end of the groove filling area 52, the filling of the strip-shaped triangular grooves 303 corresponding to the lower part through the groove filling area 52 of the mesh plate 41 is completed, and all the strip-shaped triangular grooves 303 can be filled through one stroke.

S401 f: then, the moving rod 70 and the trough area catch-up plate 75 are retracted by the linear mechanism 7, and the push plate 62 and the movable partition 61 are retracted by the horizontal push cylinder 63.

According to some embodiments, in step S402, the adhesive 306 is ethyl cyanoacrylate, and the metal particles 305 are YG8 tungsten-cobalt alloy particles, forming an attachment structure, i.e., an adhesive-metal particle mixed layer.

Based on the uniform filling device, step S402 specifically includes the following steps:

s402 a: after the slip body 100 is placed at normal temperature for 2min to 10min, the lifting mechanism is used for descending the slip body 100, the adhesive 306 is continuously coated on the top surfaces of the strip-shaped protrusions 301 and the strip-shaped triangular grooves 303 paved with the metal particles 305 again, after the coating is finished, the lifting mechanism is used for lifting the slip body 100 to be placed below the mesh plate 41, a preset filling distance is formed between the slip body and the mesh plate 41, the strip-shaped triangular grooves 303 are continuously kept corresponding to the groove filling areas 52, and the strip-shaped protrusions 301 correspond to the top surface filling areas 53;

s402 b: supplementing the fixing plate 42 with the metal particles 305 and leveling them;

s402 c: then, a horizontal pushing cylinder 63 is used for pushing a pushing plate 62 and a movable partition plate 61, so that the movable partition plate 61 moves forwards to be in contact with the fixed partition plate 51, at the moment, the movable partition plate 61 partitions the metal particles 305 on the fixed plate 42, the metal particles 305 are arranged between every two adjacent movable partition plates 61, and the partitioned metal particles 305 respectively correspond to the groove filling areas 52 and the top surface filling area 53;

s402 d: the lifting plate 8 and the top surface area material expelling plate 81 are lowered by using the vertical cylinder 83 until the top surface area material expelling plate 81 is in surface contact with the fixed plate 42 or has a preset gap, so that the top surface area material expelling plate 81 is at a height capable of effectively contacting and pushing the metal particles 305;

s402 e: the motor 71 of the linear mechanism 7 is used for rotating to drive the screw rod 74 to rotate, so that the movable rod 70 can move along the length direction of the movable screw rod 74, so that the metal particles 305 in the region where the trough region material repelling plate 75 and the top surface region material repelling plate 81 are respectively pushed towards the mesh plate 41, since the movable partition board 61 and the fixed partition board 51 are already abutted, so that the metal particles 305 in the region defined by the movable partition board 61 and the fixed partition board 51 are not pushed to other regions, the groove region material expelling plate 75 can push the metal particles 305 in the region to the groove filling region 52, the top surface region material expelling plate 81 can push the metal particles 305 in the region to the top surface filling region 53, continuing pushing until the top surfaces of the strip triangular grooves 303 and the strip-shaped bulges 301 which correspond to the bottom surfaces of the strip triangular grooves are pushed to the tail ends of the groove filling area 52 and the top surface filling area 53 through the groove filling area 52 and the top surface filling area 53 of the mesh plate 41;

s402 f: the moving rod 70 is retracted by the linear mechanism 7, the top surface material expelling plate 81 is retracted by the vertical cylinder 83, and the pushing plate 62 and the movable partition 61 are retracted by the horizontal pushing cylinder 63; the slip body 100 is placed at normal temperature for 20min to 45 min.

Example 1

Referring to fig. 4, the preparation method of example 1 is as follows:

step S401: uniformly coating ethyl cyanoacrylate on the assembling surface of the slip body 100, paving YG8 tungsten-cobalt alloy particles with the particle size of 0.5mm on the ethyl cyanoacrylate, and standing for 20min at normal temperature.

Step S402: and continuously immersing ethyl cyanoacrylate into gaps among the laid YG8 tungsten-cobalt alloy particles to ensure that ethyl cyanoacrylate exists among the YG8 tungsten-cobalt alloy particles to form an ethyl cyanoacrylate-YG 8 tungsten-cobalt alloy particle mixed layer, and standing at normal temperature for 20 min.

Step S403: baking the tile body 100 for 60min at 150 ℃.

Step S404: after cooling to normal temperature, uniformly spraying phenolic paint on the surface of the mixed layer to form a paint surface 104.

Step S405: and (3) air-drying at normal temperature for 1h or baking at the temperature of 70 ℃ for 45min, ensuring that the paint is sprayed and dried, completing the preparation of the slip coating, and forming the slip coating to form a relatively flat surface on the assembly surface.

Example 2

Referring to fig. 4, the preparation method of example 2 is as follows:

step S401: uniformly coating ethyl cyanoacrylate on the assembling surface of the slip body 100, paving YG8 tungsten-cobalt alloy particles with the particle size of 2mm on the ethyl cyanoacrylate, and standing for 45min at normal temperature.

Step S402: and continuously immersing ethyl cyanoacrylate into gaps among the laid YG8 tungsten-cobalt alloy particles to ensure that ethyl cyanoacrylate exists among the YG8 tungsten-cobalt alloy particles to form an ethyl cyanoacrylate-YG 8 tungsten-cobalt alloy particle mixed layer, and standing at normal temperature for 45 min.

Step S403: baking the tile body 100 for 120min at 90 ℃.

Step S404: after cooling to normal temperature, polyurethane paint is uniformly sprayed on the surface of the mixed layer to form a paint surface 104.

Step S405: and (3) air-drying at normal temperature for 3h or baking at 90 ℃ for 20min to ensure that the paint is sprayed and dried, so that the preparation of the slip coating is completed, and after the slip coating is formed, the assembling surface is a relatively flat surface.

Example 3

Referring to fig. 4, the preparation method of example 3 is as follows:

step S401: uniformly coating ethyl cyanoacrylate on the assembling surface of the slip body 100, paving YG8 tungsten-cobalt alloy particles with the particle size of 1.2mm on the ethyl cyanoacrylate, and standing for 30min at normal temperature.

Wherein, referring to fig. 1A and 2, the assembly face of the slip body 100 has at least two mounting slots 206 for mounting slips. As shown in fig. 3, the assembly surface of the slip body 100 is provided with strip-shaped protrusions 301 arranged transversely, strip-shaped triangular grooves 303 are formed between adjacent strip-shaped protrusions 301, the width a of the top surfaces of the strip-shaped protrusions 301 is 1/2 of the width (b-a) of the top notches of the strip-shaped triangular grooves 303, one groove surface of each strip-shaped triangular groove 303 is the vertical surface of the previous strip-shaped protrusion 301, the other groove surface is the inclined surface of the next strip-shaped protrusion 301, and an included angle of 60 degrees is formed between the two groove surfaces.

In this embodiment, one test piece is selected and directly entered into S402. The step S402 is performed after 1 test piece is left at normal temperature for 2 minutes, 1 test piece is left at normal temperature for 5 minutes, and 1 test piece is left at normal temperature for 10 minutes. The test piece shows that the process efficiency can be improved by directly entering the next step, but when the ethyl cyanoacrylate is coated again, certain disturbance can be caused to the YG8 tungsten-cobalt alloy particles and the ethyl cyanoacrylate which are filled in the strip-shaped triangular groove; the test piece is placed at normal temperature for 2-10 min, so that the situation is basically avoided, and only 2min, the coated YG8 tungsten-cobalt alloy particles and ethyl cyanoacrylate are basically not influenced except a little disturbance.

In step S402, ethyl cyanoacrylate continues to be immersed in gaps between the laid YG8 tungsten-cobalt alloy particles, to ensure that there is ethyl cyanoacrylate between YG8 tungsten-cobalt alloy particles, to form a mixed layer of ethyl cyanoacrylate-YG 8 tungsten-cobalt alloy particles, where the top surface of the mixed layer is 1mm higher than the top surface of the stripe-shaped protrusion, and the mixed layer is left at room temperature for 30 min.

In this embodiment, the laying of YG8 tungsten-cobalt alloy in S401 and S402 was performed using the uniform filling device 4 as described above. Through the operation of laying that adopts even filling device 4, through a propelling movement, can accomplish YG8 tungsten-cobalt alloy granule of step S401 and fill and lay, through propelling movement once more, can accomplish YG8 tungsten-cobalt alloy granule of step S402 and fill and lay, compare the artifical packing of accomplishing each bar triangular groove in proper order and lay to and the whole packing of secondary assembly surface is laid, greatly improved and laid efficiency, and the assurance that the homogeneity can be better.

Step S403: baking the tile body 100 for 90min at 110 ℃.

Step S404: after cooling to normal temperature, epoxy resin paint is uniformly sprayed on the surface of the mixed layer to form a paint surface 104.

Step S405: and (3) air-drying at normal temperature for 2h or baking at the temperature of 80 ℃ for 30min to ensure that the paint is sprayed and dried, completing the preparation of the slip coating, and forming the object shown in the figure 1A by forming a relatively flat assembly surface after the slip coating is formed.

Example 4

Referring to fig. 2 and 3, in the present embodiment, the slip body 100 is machined such that the mounting surface has at least two mounting grooves 206 for mounting the slips. The assembly surface of slips body 100 has the protruding 301 of bar of horizontal setting, forms bar triangular groove 303 between the protruding 301 of adjacent bar, and the protruding 301's of bar top surface width is 1/2 of bar triangular groove 303 top notch width, and a cell surface of bar triangular groove 303 is the protruding 301's of preceding bar vertical face, and another cell surface is the protruding 301's of back bar inclined plane, has 60 contained angles between two cell surfaces.

In this embodiment, in step S401, firstly, two groove surfaces of each bar-shaped triangular groove are coated with ethyl cyanoacrylate, YG8 tungsten-cobalt alloy particles are uniformly laid in each bar-shaped triangular groove, and the bar-shaped triangular groove is placed at normal temperature for 10min to enter the next step, so that YG8 tungsten-cobalt alloy particles and ethyl cyanoacrylate in the bar-shaped triangular groove are in a semi-solidified state.

Step S401, smearing ethyl cyanoacrylate on the top surface of the strip-shaped protrusion and each strip-shaped triangular groove paved with YG8 tungsten-cobalt alloy particles, filling gaps of the YG8 tungsten-cobalt alloy particles paved for the first time, continuously paving YG8 tungsten-cobalt alloy particles on the smeared ethyl cyanoacrylate again, and standing for 30min at normal temperature.

Step S402: and continuously immersing ethyl cyanoacrylate into gaps among the laid YG8 tungsten-cobalt alloy particles to ensure that ethyl cyanoacrylate exists among the YG8 tungsten-cobalt alloy particles to form a mixed layer of ethyl cyanoacrylate-YG 8 tungsten-cobalt alloy particles, wherein the top surface of the mixed layer is 2mm higher than the top surface of the strip-shaped protrusion, and standing at normal temperature for 30 min.

Step S403: baking the tile body 100 for 90min at 110 ℃.

Step S404: after cooling to normal temperature, uniformly spraying black acrylic resin paint on the surface of the mixed layer to form a paint surface 104, wherein the paint surface 104 is positioned on the surface of the mixed layer.

Step S405: and (3) air-drying at normal temperature for 2h or baking at the temperature of 80 ℃ for 30min, ensuring that the paint is sprayed and dried, completing the preparation of the slip coating, and forming the slip coating to form a relatively flat surface on the assembly surface.

And finally, packaging the prepared slips for storage for later use.

FIGS. 10A and 10B are photographs of prior art slips assembled according to the present application.

FIG. 11 is a photograph and a magnified partial view of the damage to casing caused by slips of the prior art.

FIG. 12 is a photograph and a partially enlarged photograph of damage to a casing by slips according to an exemplary embodiment of the present invention.

The slips obtained through the embodiment of the application are assembled and then applied to drilling, not only can be used for effectively occluding the inner wall of a shaft or a sleeve, but also can leave marks which are only small punctiform pits without other loss, as shown in fig. 11 and 12, the depth of each small pit is about 0.3 mm-0.8 mm, and the length and the width of each small pit are about 0.8 mm-1.2 mm.

What has been described above is merely a preferred example of the present invention. It should be noted that other equivalent variations and modifications can be made by those skilled in the art based on the technical teaching provided by the present invention, and the protection scope of the present invention should be considered.

Claims (12)

1. A slip, comprising:

the slip comprises a slip body and a slip body, wherein the slip body is provided with an assembling surface, and the assembling surface is provided with a plurality of bulges;

the attaching structure is attached to part or all of the assembling surface and comprises an adhesive and metal particles;

and the paint surface covers part or all of the attachment structure.

2. The slip of claim 1, wherein the plurality of protrusions comprise laterally disposed bar-shaped protrusions;

preferably, the assembling surface is provided with a plurality of transverse strip-shaped bulges, and strip-shaped triangular grooves are formed between the adjacent strip-shaped bulges.

3. The slip of claim 2, wherein the width of the top surface of the strip-shaped protrusion is 1/10-2/5, preferably 1/10-1/5, more preferably 1/10 of the width of the top notch of the strip-shaped triangular groove; and/or

The height of the strip-shaped protrusions is 1-2 mm, preferably 1-1.5 mm, and more preferably 1-1.3 mm.

4. The slip of claim 3, wherein the attachment structure fills the triangular bar-shaped grooves and is 0.2-2 mm higher than the top surfaces of the bar-shaped protrusions; and/or

The thickness of the attachment structure is 0.3-1 mm, preferably 0.3-0.5 mm, and more preferably 0.4-0.5 mm; and/or

The volume ratio of the adhesive to the metal particles is 1.0-2.0, preferably 1.0-1.5, and more preferably 1.3-1.5.

5. The slip of any of claims 1-4, wherein the adhesive comprises a cyanoacrylate ester, preferably ethyl cyanoacrylate; and/or

The metal particles comprise tungsten-cobalt alloy particles, preferably YG8 tungsten-cobalt alloy particles;

the particle size of the tungsten-cobalt alloy particles is 0.5-2 mm, preferably 0.5-1 mm, and more preferably 0.5-0.8 mm.

6. The slip of claim 1, wherein the finish comprises one or more of an acrylic paint, a polyurethane paint, an epoxy paint, a phenolic paint; and/or

The thickness of the paint surface is 0.02-0.05 mm, preferably 0.02-0.03 mm, and more preferably 0.03 mm.

7. A method of making the slips of any one of claims 1-6, comprising the steps of:

step a), applying an adhesive and metal particles to an assembly surface of a slip body to form an adhesive-metal particle mixed layer;

step b) baking the slips with the adhesive-metal particle mixed layer prepared in the step a);

and c) cooling the slips baked in the step b), and spraying a paint surface.

8. The method of claim 7, wherein step a) comprises:

coating an adhesive on the assembling surface of the slip body, and paving metal particles on the adhesive;

immersing adhesive in gaps for laying metal particles;

and after the adhesive-metal particle mixed layer is formed, standing at normal temperature for 20-45 minutes.

9. The method according to claim 7 or 8, wherein the step a) further comprises:

the assembly surface of the slip body is provided with a plurality of transverse strip-shaped protrusions, triangular grooves are formed between every two adjacent strip-shaped protrusions, two groove surfaces of each triangular groove are coated with an adhesive, metal particles are laid in each triangular groove, and the slip body is placed at normal temperature for 2-10 minutes;

and continuously coating the adhesive on the top surface of each strip-shaped protrusion and the triangular groove on which the metal particles are already laid, laying the metal particles on the adhesive again, and standing at normal temperature for 20-45 minutes.

10. The method according to any one of claims 7-9, wherein the glue in step a) comprises a cyanoacrylate, preferably ethyl cyanoacrylate; and/or

The metal particles comprise tungsten-cobalt alloy particles, preferably YG8 tungsten-cobalt alloy particles; the particle size of the tungsten-cobalt alloy particles is 0.5-2 mm; and/or

The paint surface comprises one or more of acrylic resin paint, polyurethane paint, epoxy resin paint and phenolic paint.

11. The method according to any one of claims 7 to 10, wherein the baking temperature in step b) is 90 ℃ to 150 ℃ and the baking time is 60 to 120 minutes.

12. The method according to any one of claims 7-11, further comprising:

step d) carrying out normal-temperature air drying or baking on the paint surface formed in the step c);

wherein the normal-temperature air drying time is 1-3 hours; or

The baking time is 20-45 minutes, and the temperature is 70-90 ℃.

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