CN215057245U

CN215057245U - Drilling-free blind plate well cementing device

Info

Publication number: CN215057245U
Application number: CN202121165688.0U
Authority: CN
Inventors: 苏长明; 唐丙杰; 田玉刚
Original assignee: Liaoning Huaye Energy Technology Service Co ltd
Current assignee: Liaoning Huaye Energy Technology Service Co ltd
Priority date: 2021-05-27
Filing date: 2021-05-27
Publication date: 2021-12-07
Anticipated expiration: 2031-05-27

Abstract

The utility model discloses an exempt from to bore blind plate well cementation device belongs to well cementation technical field, including the blind plate part and bump the pressure plug, be provided with on the blind plate part and be the mud passageway that link up the form and be used for connecting the blind plate part can separate or the connection structure of disconnection with the sleeve pipe, and the blind plate part and bump and press to be equipped with on one of them of plug the first connection locking structure that is used for being connected with another person. The utility model provides an exempt from to bore blind plate well cementation device after the well cementation, can smoothly will bump and press plug and blind plate to salvage out, avoids drilling, eliminates drilling to sheathed tube influence, and salvages the back, and the pit shaft is latus rectum such as, does not have the undergauge problem, does benefit to and carries out follow-up borehole operation.

Description

Drilling-free blind plate well cementing device

Technical Field

The utility model relates to a well cementation technical field, more specifically say, relate to a exempt from to bore blind plate well cementation device.

Background

Cementing is an important ring in well completion and refers to the construction of running a casing into a well and injecting cement slurry into the annular space between the well bore and the casing. In the construction process, the inner and outer parts of the sleeve and the wall of the stratum well need to be sealed at a certain height position, and the space needing to be injected with cement paste is separated from the underground part. In the prior art, a well packer is generally used for plugging and dividing an annular space outside a casing, and a blind plate is used for radially plugging a casing pipe cavity and dividing an inner space of the casing; then pour into grout into the sleeve pipe, grout flows into the sleeve pipe outside through the grout through-hole on the sleeve pipe wall of blind plate top, seals the annular space between well and the sleeve pipe, then puts into to the sleeve pipe and bumps the pressure plug, impels to bump the pressure plug through rivers and all impress the annular space with the intraductal grout of sleeve, and shutoff mud passageway, wait to congeal the back, grout solidifies, then, often among the prior art to bump pressure plug and blind plate drill hole, with the intercommunication sleeve pipe lumen, carry out subsequent borehole operation.

However, when the collision pressure rubber plug and the blind plate are drilled, the phenomenon of drilling the casing wall to be thin or drilling leakage is easy to occur, so that the production life of the oil well is shortened or the oil well is scrapped to be seriously used. Therefore, how to solve the problem that in the prior art, after cementing, the collision pressure rubber plug and the blind plate are drilled to penetrate through the shaft, so that the casing is easy to damage and damaged, which is not beneficial to the subsequent downhole operation, is the current situation, and the technical problem to be solved by the technical staff in the field is urgently needed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an exempt from to bore blind plate well cementation device, after the well cementation, can smoothly will bump and press plug and blind plate to salvage out, avoid drilling, eliminate drilling to sheathed tube influence, and salvage the back, the lumen is latus rectum such as basically, does not have the undergauge problem, does benefit to and carries out follow-up borehole operation.

In order to achieve the above object, the utility model provides a pair of exempt from to bore blind plate well cementation device, press the plug including the blind plate part and bumping, be equipped with on the blind plate part and be the mud passageway that link up the form and be used for connecting blind plate part and sleeve pipe can separate or the connection structure of disconnection, the blind plate part reaches bump and press to be equipped with on one of the two of the plug and be used for the first connection locking structure that is connected with another person.

Preferably, the fishing rod further comprises a fishing barrel, and a second connecting and locking structure used for being connected with the fishing barrel is arranged on the pressure rubber plug.

Preferably, a plugging component for conducting or plugging is arranged on the slurry channel.

Preferably, the connecting structure comprises a locking pin passing through the blind plate member and adapted to be connected to the sleeve.

Preferably, the first connecting and locking structure comprises a connecting slip connected with the blind plate component, a first elastic clamping cavity is arranged on the connecting slip, and the first elastic clamping cavity at least has expansion elasticity for expanding the inner diameter or recovering the inner diameter at the cavity opening.

Preferably, the inner wall of the first elastic clamping cavity is provided with a connecting clamping tooth in a protruding manner, the touch pressing rubber plug is provided with an outer clamping tooth matched with the connecting clamping tooth, and the connecting clamping tooth is in a ratchet shape inclined from the cavity opening to the cavity bottom from inside to outside.

Preferably, the blind plate component comprises a sealing blind plate and an auxiliary blind plate connected with the sealing blind plate, the sealing blind plate is in sealing connection with the inner wall of the casing, and the connecting structure and the connecting slip are arranged on the auxiliary blind plate.

Preferably, a clamping slip is arranged on the overshot and provided with a second elastic clamping cavity, and the second elastic clamping cavity at least has expansion elasticity for expanding the inner diameter or restoring at the cavity opening.

Preferably, the inner wall of the second elastic clamping cavity is convexly provided with a clamping tooth, the bumping rubber plug is provided with an outer clamping tooth matched with the clamping tooth, and the clamping tooth is in a ratchet shape which is inclined from the cavity opening to the cavity bottom from inside to outside.

Preferably, the connecting slips are connected with the auxiliary blind plate in a sliding mode, and a first anti-falling structure for preventing the connecting slips from falling off is arranged between the auxiliary blind plate and the connecting slips.

The technical scheme provided by the application can comprise the following beneficial effects: the utility model provides a exempt from to bore blind plate well cementation device includes the blind plate part and bumps and presses the plug, the blind plate part can link to each other with the sleeve pipe through connection structure and separate the lumen, and simultaneously, can be connected with bumping the pressure plug through first connection locking structure blind plate part, then can link to each other with the blind plate part after bumping and pressing the plug and setting down the well, treat grout marquis after congealing, carry and draw or salvage and bump the pressure plug, the blind plate part also can be carried, at this moment, the connection structure atress separation or the disconnection of blind plate part, then bump the plug and can be carried in step or salvage the well with the blind plate part, the sleeve pipe lumen resumes the intercommunication, do not need drilling, and intraductal not have remaining well cementation device, there is not the undergaught part, whole sleeve pipe lumen all is the latus switch-on situation such as the same with the internal diameter size, do benefit to follow-up borehole operation.

The technical effects that can be produced by the preferred technical scheme in the technical schemes provided by the application are described in detail in the following.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of a blind plate component of a drilling-free blind plate fixing device in an embodiment of the present invention;

FIG. 2 is a schematic view of the connection between the blind plate member and the rubber plug;

FIG. 3 is a schematic connection diagram of the blind plate member, the pressing rubber plug and the overshot according to the embodiment of the present invention;

fig. 4 is a schematic structural view of the overshot according to the embodiment of the present invention;

fig. 5 is a schematic structural view of the rubber plug pressed by the impact in the embodiment of the present invention.

In fig. 1-5:

1. a well packer; 2. setting a valve sleeve; 3. sealing the blind plate; 4. an auxiliary blind plate; 5. a plugging member; 6. a locking pin; 7. a rubber plug cylinder; 71. a second inclined surface; 8. connecting slips; 81. a first locking tab; 82. connecting clamping teeth; 84. a first inclined surface; 9. the rubber plug is pressed; 91. a plug head; 92. fishing a handle; 93. a rubber bowl; 10. a water injection channel; 11. a slurry channel; 12. an overshot; 121. a fourth inclined surface; 13. clamping slips; 131. a second locking tab; 132. clamping the clamping teeth; 133. a third inclined surface.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

The purpose of this embodiment is to provide a drilling-free blind plate well cementation device, after the well cementation, can smoothly salvage out touching and pressing plug and blind plate, avoid drilling, eliminate the influence of drilling to the sheathed tube, and salvage the back, the lumen is the latus rectum such as, does not have the undergauge problem, does benefit to and carries out follow-up borehole operation.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. The embodiments described below do not limit the scope of the invention described in the claims. Further, the entire contents of the configurations shown in the following embodiments are not limited to those necessary as a solution of the invention described in the claims.

Referring to fig. 1-5, the drilling-free blind plate well cementing device provided by the embodiment comprises a blind plate part and a collision pressing rubber plug 9, wherein the blind plate part is used for being connected with a casing and dividing a pipe cavity of the casing, a slurry channel 11 is arranged on the blind plate part, the slurry channel 11 is in a through shape along the self extending direction, and if two ends of the slurry channel are open, the slurry channel is used for being communicated with a slurry through hole on the casing to establish a cement slurry injection passage for well cementing; the blind plate component is also provided with a connecting structure used for being connected with the sleeve, and the connecting structure can be separated or disconnected after being subjected to external force, namely, the blind plate component can be separated from the sleeve under the action of the external force; meanwhile, one of the blind plate part and the bumping rubber plug 9 is provided with a first connecting and locking structure for connecting with the other, and the first connecting and locking structure can also have at least one-way locking function; when the collision pressing rubber plug 9 enters the well, the collision pressing rubber plug advances and pushes cement slurry in the direction of the blind plate component, and when the collision pressing rubber plug 9 touches the blind plate component, the collision pressing rubber plug can be connected with the blind plate component through the first connecting and locking structure, the locking direction of the first connecting and locking structure is set to be the upward direction from the blind plate component to the well mouth, so that the collision pressing rubber plug 9 and the blind plate component can have a locking connection effect in the upward direction, and stable connection is realized; the touch rubber plug 9 is lifted, then the touch rubber plug 9 lifts the blind plate component towards the direction of the wellhead, the connecting structure between the blind plate component and the sleeve is separated or disconnected by the lifting force, the blind plate component is separated from the sleeve in a short circuit manner, and is lifted out of the well together with the touch rubber plug 9, and the pipe cavity of the sleeve is recovered to be in a conduction state. So set up, the drilling-free blind plate well cementation device that this embodiment provided, after the well cementation operation, can be directly and smoothly salvage away bumping and pressing plug 9 and blind plate part, need not carry out the drilling operation, relatively speaking, the operation intensity alleviates with the degree of difficulty, and the sleeve pipe can not receive the drilling influence and produce the pipe wall attenuation or by the drilling split, bore the problem of leaking, bump and press plug 9 and blind plate part and be carried out the well, the intraductal well cementation device that does not remain, the whole latus rectum that all is the same with the internal diameter size of lumen switches on the situation, there is not undergauge department, can not produce the block to follow-up running tool, in having solved prior art, easily block to running tool, the problem of production operation accident, operation security, convenience and smoothness have been improved.

The blind plate part is connected with the sleeve, and is separated after being stressed, so that the wall of the sleeve is prevented from being damaged in the separation process. Specifically, the blind plate component and the sleeve connecting structure can be realized by penetrating the blind plate component and the setting valve sleeve 2 through the locking pin 6 by including the locking pin 6, and the blind plate component and the setting valve sleeve 2 are both provided with connecting holes for the locking pin 6 to penetrate or penetrate. Therefore, when the blind plate part is pulled, the locking pin 6 is broken under the stress, so that the blind plate part can be separated from the setting valve sleeve 2, and the blind plate part is smoothly pulled out of the well.

As shown in fig. 1, for better sealing the pipe cavity of the casing and avoiding cement slurry from being injected into the separated downhole space, the blind plate component may include a sealing blind plate 3 and an auxiliary blind plate 4, the sealing blind plate 3 is in sealing connection with the casing or the setting valve sleeve 2, a sealing ring groove may be provided on the sealing blind plate 3, a sealing ring embedded in the sealing ring groove is provided between the sealing blind plate 3 and the inner wall of the casing or the setting valve sleeve 2, and the sealing blind plate 3 may be made of other materials, and has an overall full-circle column shape and an outer diameter in interference fit with the inner diameter of the casing or the setting valve sleeve 2. Mud passageway 11 all establishes on vice blind plate 4 with first connection locking structure, bumps and presses plug 9 and is connected with vice blind plate 4, and sealed blind plate 3 is connected with vice blind plate 4, can be the integral type, also can connect through the fastener, so, when carrying and drawing, sealed blind plate 3 and vice blind plate 4 are all carried and are pulled out the well.

After the rubber plug 9 is pressed to push cement slurry into an annular space outside the sleeve, a slurry channel 11 on a blind plate part needs to be plugged, in the prior art, the phenomena that the plugging is not in place and tight enough and the cement slurry is poured into the sleeve reversely often occur, and tools in the sleeve are easy to coagulate and fish up too soundly. To solve this problem, in the present embodiment, the slurry channel 11 of the blind plate member is provided with a plugging member 5 for conducting or plugging. As shown in fig. 1, the plugging member 5 may be a valve, such as a check valve, so that it is not only able to prevent cement slurry from flowing back into the pipe, but also able to achieve conduction or plugging without performing excessive additional operations, thereby avoiding increasing the difficulty of operation.

The collision pressing rubber plug 9 is lifted, a lifting rope or a tool can be connected to the collision pressing rubber plug 9 before going down the well, or a fishing tool can be lowered after the collision pressing rubber plug 9 goes down the well and waiting for coagulation is finished, therefore, in the embodiment, as shown in fig. 3, the drilling-free blind plate well cementation device further comprises a fishing barrel 12, one of the collision pressing rubber plug 9 or the fishing barrel 12 is provided with a second connection locking structure used for being connected with the other, the second connection locking structure can also have a one-way locking function, the fishing barrel 12 is lowered into a sleeve at the well mouth, after the fishing barrel 12 touches the collision pressing rubber plug 9, the fishing barrel 12 is connected with the collision pressing rubber plug 9 through the second connection locking structure, the locking direction of the second connection locking structure is an upward direction facing the well mouth, when the fishing barrel 12 and the collision pressing rubber plug 9 are lifted and fished, the fishing barrel 12 and the collision pressing rubber plug 9 can be stably connected, and the fishing barrel 12, the fishing barrel and the fishing barrel can be lifted and lifted, The collision pressing rubber plug 9 and the blind plate component are fished out together, and the operation is convenient and smooth.

In order to facilitate the collision and pressing of the rubber plug 9 and the blind plate part, the auxiliary blind plate 4 can be a hollow cylinder with one open end and is provided with a cylinder cavity for the collision and pressing of the rubber plug 9, the first connecting and locking structure is arranged in the cylinder cavity, and the slurry channel 11 can be arranged on the side wall of the cylinder cavity. Specifically, as shown in fig. 1 and fig. 2, the first connecting and locking structure may include a connecting slip 8 connected to the auxiliary blind plate 4, the connecting slip 8 is provided with a first elastic clamping cavity, the first elastic clamping cavity may be coaxial with a cylinder cavity of the auxiliary blind plate 4, and the first elastic clamping cavity may at least allow a partial region of the rubber plug 9, such as the plug head 91, to enter and realize connecting and locking; can be, the accent in at least first elasticity card chamber has the flexible elasticity that enlarges the internal diameter or retract and resume, then under the promotion of area pressure rivers, it advances to stopper head 91 and struts the accent in first elasticity card chamber and imbeds first elasticity card chamber to bump and press plug 9, then first elasticity card chamber receives the elasticity effort of retracting, can the chucking or cramp and bump and press plug 9, and when bumping and pressing plug 9 and being carried upwards, produce the trend that breaks away from first elasticity card chamber, then the first elasticity card chamber of the effort of retracting produces the trend of retracting thereupon, can the chucking bump and press plug 9 more, possess certain one-way locking effect, realize the blind plate part and bump the zonulae occludens of pressing plug 9 and press.

A rubber plug tube 7 can be further arranged in the tube cavity of the auxiliary blind plate 4, the rubber plug tube 7 is a hollow tube shape with two open ends and is attached to the inner wall of the auxiliary blind plate 4, and the rubber plug tube 7 can be in threaded connection with the auxiliary blind plate 4 or in vulcanization composite connection. The rubber plug cylinder 7 can also be connected with the auxiliary blind plate 4 at one end and extend out to the upper part of the auxiliary blind plate 4 at the other end, and the connecting slip 8 is connected with the inner wall of the rubber plug cylinder 7. Bump and be provided with rubber bowl 93 in the main part of pressing plug 9, rubber bowl 93's external diameter can carry out interference fit with the internal diameter of packing element stopper, so, smash into the first elasticity card chamber of connecting slips 8 and carry out the locking connection back colliding plug 91 of pressing plug 9, collide the rubber bowl 93 of pressing plug 9 and be in the top of connecting slips 8 to carry out interference fit with 7 inner walls of a packing element, stronger frictional force has between the two, when carrying and drawing, also play certain enhancement connection's effect.

The connecting slips 8 can be in a cylindrical shape, and the connecting slips 8 and the rubber plug cylinder 7 can be in fixed connection, threaded connection or sliding connection. In this embodiment, as shown in fig. 2, the connection slip 8 is slidably connected to the plug cylinder 7, the connection slip and the plug cylinder 7 are coaxially arranged, and a first anti-disengaging structure for preventing the connection slip 8 from disengaging is arranged between the connection slip 8 and the plug cylinder 7. Specifically, as shown in fig. 2, a first inclined surface 84 is provided on the outer wall of the top end (toward the end of the rubber plug 9) of the connecting slip 8, a second inclined surface 71 is provided on the inner wall of the cylinder cavity of the auxiliary blind plate 4 or the inner wall of the cylinder cavity of the rubber plug cylinder 7, the first inclined surface 84 and the second inclined surface 71 are both inclined in the direction from the center to the outside of the cylinder and from the cylinder cavity opening to the cavity bottom, the first inclined surface 84 and the second inclined surface 71 are used for abutting against each other, and after the rubber plug 9 is connected with the connecting slip 8, the connecting slip 8 is lifted towards the well mouth, the connecting slip 8 moves upwards and cannot be separated from the cylinder cavities of the rubber plug cylinder 7 and the auxiliary blind plate 4 under the pressing effect of the second inclined surface 71.

As shown in fig. 2, the rubber plug cylinder 7 may be provided with a first inner cylinder cavity with a smaller inner diameter and a second inner cylinder cavity with a larger inner diameter, the second inclined plane 71 is disposed on the inner wall of the first inner cylinder cavity, and the inner diameter of the first inner cylinder cavity may be smaller than the outer diameter of the rubber plug 9 main body, so that the top end of the first inner cylinder cavity may abut against the plug 91 of the rubber plug 9 and the step surface of the middle main body, and thus, the connection stability of the connecting slip 8, the rubber plug cylinder 7 and the auxiliary blind plate 4 may be enhanced.

Connect slips 8 can be and be the cavity tube-shape and be equipped with a plurality of first locking pieces 81 along circumference distribution, a plurality of first locking pieces 81 are arranged and are enclosed together along circumference and form first elasticity card chamber, the bottom of each first locking piece 81 is all fixed to be set up, if all connect on the bottom plate, or the bottom of each first locking piece 81 all links together, be the integral type structure, and all be provided with the interval between every two adjacent first locking pieces 81 along circumference, this interval forms the fine motion space of part above each first locking piece 81 bottom, make first elasticity card chamber at least mouth of a cavity department have the flexible elasticity that enlarges internal diameter or retract.

Furthermore, in order to strengthen the one-way locking function and the connection stability and tightness, a connecting clamping tooth 82 protrudes from the inner wall of the first elastic clamping cavity, and a tooth socket is arranged between the connecting clamping tooth 82 and the inner wall of the first elastic clamping cavity and a step surface is formed. The outer wall of the rubber plug 9 is impacted, and at least the plug head 91 is provided with an outer clamping tooth. When the plug head 91 of the rubber plug 9 is hit into the first elastic clamping cavity, the outer clamping tooth is clamped into the tooth groove and is abutted against the step surface, and when the plug head is subjected to upward pulling force towards the wellhead direction, the outer clamping tooth is meshed with the connecting clamping tooth 82, so that unidirectional locking is realized. The coupling catches 82 are provided on an inner wall of the first locking piece 81.

Furthermore, as shown in fig. 1, the connecting teeth 82 are in a ratchet shape, and the whole tooth socket or the step surface abutting against the outer teeth is in an inclined shape from inside to outside and from the mouth to the bottom of the cavity, so that the unidirectional locking function is enhanced, and the separation of the impact rubber plug 9 and the connecting slip 8 can be effectively prevented.

As shown in fig. 3, the overshot 12 is a hollow cylinder, and at least for being open with the one end that links to each other with the pressure plug 9, the second is connected locking structure and is set up in the barrel cavity mouth department of the overshot 12, the second is connected locking structure and also can be including the chucking slips 13 with 12 inner wall connections of overshot, be provided with the second elasticity card chamber that supplies to touch the fishing handle 92 that presses the plug 9 and stretch into on the chucking slips 13, the second elasticity card chamber extends to and is whole card chamber in the upper end of mouth department or being close to the mouth at least, have the flexible elasticity that enlarges the internal diameter or resume. So, put in fishing barrel 12 at the well head, fishing barrel 12 pound to bumping and press the plug 9, the salvage handle 92 of bumping and pressing plug 9 can strut the second elasticity card chamber and imbed the second elasticity card intracavity on fishing barrel 12, then the second elasticity card chamber is held tightly or is cramped and is bumped and press the salvage handle 92 of plug 9, and bump and press plug 9 when being pulled upwards, it produces the trend of contracting thereupon to contract by elasticity reaction force second elasticity card chamber that contracts, can the chucking bump and press plug 9 more, possess certain one-way locking effect, realize fishing barrel 12 and bump the zonulae occludens of pressing plug 9.

The clamping slips 13 can be cylindrical, and the clamping slips 13 and the overshot 12 can be fixedly connected or in threaded connection. In this embodiment, the clamping slip 13 and the overshot 12 are slidably connected and arranged in the same axial direction, the outer diameter of the clamping slip 13 is smaller than the inner diameter of the overshot 12, and a second anti-disengaging structure for preventing the clamping slip 13 from disengaging is arranged at the opening of the overshot 12. Specifically, as shown in fig. 4, a third inclined plane 133 is disposed on an outer wall of a bottom end (facing one end of the impact plug 9) of the clamping slip 13, a fourth inclined plane 121 is disposed on an inner wall of a cylinder cavity of the overshot 12, the third inclined plane 133 and the fourth inclined plane 121 are both inclined from a center to an outside of the cylinder from one end of the cylinder cavity close to the clamping slip 13 to one end far away from the clamping slip 13, the third inclined plane 133 and the fourth inclined plane 121 are used for abutting against each other, and after the impact plug 9 is connected with the clamping slip 13, the third inclined plane and the fourth inclined plane 121 are lifted and pulled in a wellhead direction, the clamping slip 13 moves upward and is pressed by the fourth inclined plane 121, so that the cylinder cavity of the overshot 12 cannot be separated.

The clamping slip 13 may be a hollow cylinder and is provided with a plurality of second locking sheets 131 distributed along the circumferential direction, the plurality of second locking sheets 131 are arranged along the circumferential direction and are enclosed to form a second elastic clamping cavity, the bottom ends of the second locking sheets 131 are all fixedly arranged, if all connected to the bottom plate, or the bottom ends of the second locking sheets 131 are all connected together, so as to form an integral structure, and an interval is arranged between every two adjacent second locking sheets 131 along the circumferential direction, and the interval forms a micro-motion space above the bottom end of each second locking sheet 131, so that the second elastic clamping cavity has a telescopic elasticity for expanding the inner diameter or retracting at least at the cavity opening.

Furthermore, in order to strengthen the one-way locking effect and the stability and tightness of connection, the inner wall of the second elastic clamping cavity is convexly provided with a clamping tooth 132, and a tooth socket is arranged between the clamping tooth 132 and the inner wall of the second elastic clamping cavity and a step surface is formed. An outer clamping tooth is arranged on the fishing handle 92 of the bumping rubber plug 9. When the fishing handle 92 of the rubber plug 9 is hit into the second elastic clamping cavity, the outer clamping tooth is clamped into the tooth groove and is abutted against the step surface, and when the fishing rod is subjected to upward pulling force towards the wellhead direction, the outer clamping tooth is meshed with the clamping tooth 132 to realize unidirectional locking. The chucking teeth 132 are provided on the inner wall of the second locking piece 131.

Further, as shown in fig. 3, the clamping teeth 132 are ratchet-shaped, and the whole tooth socket or the step surface abutting against the outer clamping teeth is inclined from inside to outside and from the mouth to the other end, so that the unidirectional locking function is enhanced, and the separation of the rubber plug 9 and the clamping slip 13 can be effectively prevented.

The annulus outside the casing is separated, and is generally carried out by using a well packer 1, therefore, in the embodiment, the drilling-free blind plate well cementation device further comprises the well packer 1 which is used for being sleeved on the outer wall of the casing, the well packer 1 can be a well packer in the prior art, water is injected into the well packer 1 through a channel in the casing, the well packer 1 can be expanded, and therefore the annulus outside the casing is separated. The blind plate component and the setting valve sleeve 2 are both provided with a water injection channel 10 which is communicated with the inner pipe cavity of the sleeve and the well packer 1. The filling channel 10 may also be provided with a one-way/non-return valve.

It should be noted that the terms "first," "second," and the like, as used herein, are not intended to limit the specific order, but merely to distinguish one element or function from another. The stated horizontal, vertical, up, down, left, right, top and bottom are the same when the drilling-free blind plate well cementation device is in the placing state or the using state as shown in the attached drawings.

It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments. The utility model provides a plurality of schemes contain the basic scheme of itself, mutual independence to restrict each other, but it also can combine each other under the condition of not conflicting, reaches a plurality of effects and realizes jointly.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The drilling-free blind plate well cementation device is characterized by comprising a blind plate part and a collision pressing rubber plug (9), wherein a slurry channel (11) which is in a through shape and a connecting structure which is used for connecting the blind plate part with a sleeve and can be separated or disconnected are arranged on the blind plate part, and a first connecting locking structure which is used for being connected with the other one is arranged on one of the blind plate part and the collision pressing rubber plug (9).

2. The drilling-free blind plate well cementation device as claimed in claim 1, further comprises an overshot (12), wherein the impact rubber plug (9) is provided with a second connection locking structure for connecting with the overshot (12).

3. Drilling-free blind plate cementing device according to claim 1, characterized in that the slurry channel (11) is provided with a plugging member (5) for conducting or plugging.

4. Drilling-free blind plate cementing device according to claim 1, wherein the connecting structure comprises a locking pin (6), the locking pin (6) passing through the blind plate member and being adapted to be connected to the casing.

5. Drilling-free blind plate cementing device according to claim 2, wherein the first connection locking structure comprises a connection slip (8) connected with the blind plate part, the connection slip (8) is provided with a first elastic clamping cavity, and the first elastic clamping cavity has expanded inner diameter or restored elastic elasticity at least at the cavity opening.

6. The drilling-free blind plate well cementation device as claimed in claim 5, wherein a connecting clamping tooth (82) protrudes from the inner wall of the first elastic clamping cavity, an outer clamping tooth matched with the connecting clamping tooth (82) is arranged on the pressing rubber plug (9), and the connecting clamping tooth (82) is in a ratchet shape inclined from the cavity opening to the cavity bottom from inside to outside.

7. Drilling-free blind plate cementing device according to claim 5, characterized in that the blind plate part comprises a sealing blind plate (3) and a secondary blind plate (4) connected with the sealing blind plate (3), the sealing blind plate (3) is connected with the inner wall of the casing in a sealing way, and the connecting structure and the connecting slips (8) are arranged on the secondary blind plate (4).

8. Drilling-free blind plate cementing device according to claim 2, characterized in that the overshot (12) is provided with a gripping slip (13), the gripping slip (13) being provided with a second elastic gripping chamber having an enlarged inner diameter or a restored elasticity at least at the mouth.

9. The drilling-free blind plate well cementation device as claimed in claim 8, wherein a clamping tooth (132) protrudes from the inner wall of the second elastic clamping cavity, an outer clamping tooth matched with the clamping tooth (132) is arranged on the bumping rubber plug (9), and the clamping tooth (132) is in a ratchet shape inclined from the cavity opening to the cavity bottom from inside to outside.

10. The drilling-free blind plate well cementation device as claimed in claim 7, wherein the connecting slip (8) is connected with the auxiliary blind plate in a sliding way, and a first anti-falling structure for preventing the connecting slip from falling off is arranged between the auxiliary blind plate and the connecting slip.