CN112345164B

CN112345164B - Calibration rubber plug for casing sealing test

Info

Publication number: CN112345164B
Application number: CN202011206196.1A
Authority: CN
Inventors: 马国耀; 杨晨; 肖志海; 居建江
Original assignee: Jiangsu Huarisheng Oil And Gas Downhole Tools Co ltd
Current assignee: Jiangsu Huarisheng Oil And Gas Downhole Tools Co ltd
Priority date: 2020-11-03
Filing date: 2020-11-03
Publication date: 2022-12-16
Anticipated expiration: 2040-11-03
Also published as: CN112345164A

Abstract

The invention discloses a novel calibration rubber plug for casing sealing test, which comprises a rubber plug top, wherein a threaded block is fixedly connected to the bottom end of the rubber plug top, a groove A is fixedly connected to the middle part of the top end of the rubber plug top, a moving block A is slidably connected inside the groove A, a groove B is fixedly connected to the left side of the moving block A, a moving block B is slidably connected inside the groove B, a connecting rod is fixedly connected to the left side of the moving block B, a supporting plate is fixedly connected to the right side of the top end of the rubber plug top, an open groove is fixedly connected to the middle part of the top end of the supporting plate, slide rails are fixedly connected to the left side and the right side inside of the open groove, slide blocks are slidably connected to the surfaces of the slide rails, a buffer plate is fixedly connected between the slide blocks, and a supporting rod is fixedly connected to the top end of the buffer plate.

Description

Calibration rubber plug for casing sealing test

Technical Field

The invention relates to a calibration rubber plug, in particular to a calibration rubber plug for a casing pipe sealing test.

Background

The butyl rubber bottle stopper has good intrinsic cleanliness, chemical stability, air tightness and biological performance, but the compatibility problem of the rubber stopper and medicines is generated due to the complex formula and the relation of the concentration gradient of added raw materials, and the compatibility problem of the rubber stopper and the medicines is generated by the absorption, adsorption, leaching and permeation of some medicines with stronger molecular activity after being packaged, and the more prominent are part of cephalosporins, part of large infusion solutions, more traditional Chinese medicine injection preparations and the like. Therefore, the inert soft coating is selected to cover the surface of the rubber plug and isolate the direct contact between the medicine and the rubber plug, so that the compatibility with the medicine can be obviously improved. All medicinal rubber plugs (including rubber plugs for various dosage forms such as transfusion, oral liquid and the like) stop using common natural rubber plugs uniformly from the state to the end of 2004; butyl rubber plug sleeves are used for medicine rubber plugs in pharmaceutical factories and are generally used in building basements for protecting pipelines or facilitating iron rings for pipeline installation. The casing pipe is divided into a rigid casing pipe and a flexible waterproof casing pipe. The invention discloses a seamless steel tube for a casing and an oil tube for an oil well, and relates to a calibration rubber plug for casing sealing test.

The patent number is as follows: CN102251755A discloses a vibration excitation rubber plug, which has been studied in relation to the vibration cementing technology in drilling engineering since a long time abroad, and experiments by the Soviet union-Blume oil research institute prove that when the vibration excitation frequency is 20 Hz to 175 Hz, the cement strength can be improved by fifteen percent to twenty percent no matter the vibration strength, and the vibration excitation rubber plug can be successfully used in nearly one hundred wells of five oil fields; the American Dale Dusterhoft and CTES company places a pressure measuring instrument outside a casing, and proves that cement paste in a well can keep a low-speed movement by applying proper low-frequency hydraulic pulse on a wellhead after well cementation; on-board vibratory equipment was developed by Trican oil well service, canada. The research and development of the vibration well cementation technology in China is rapid, from the research of Daqing drilling institute and technical service company in 1992 on the hydraulic pulse casing shoe, field tests of hundreds of oil wells are carried out by the hydraulic pulse generator of Liaohe oil field drilling company in 1998, the percent of pass is ninety-nine, and the percent of quality is ninety-four. The invention is characterized in that the vibration exciter is combined with a cementing plug to form damping resonance in the process of vibrating and exciting a casing string to form dynamic vibration cementing, thereby effectively preventing formation fluid from entering, improving the interface and cement bond strength and obviously improving the quality

However, the above patents have some disadvantages: 1. the above design has no buffer structure and is easily crushed by a heavy object, so improvement is needed. 2. Above-mentioned design is when dismantling, if the plug installation when too tight, is difficult to follow the sleeve pipe and dismantles to inconvenient the calibration of carrying out the sealed test of sleeve pipe, so need improve.

Disclosure of Invention

The invention provides a calibration rubber plug for a casing sealing test, which has a cache structure, can well prevent a rubber plug from being crushed by a heavy object, is convenient to detach from a casing, is more convenient to calibrate the casing sealing test, and can effectively solve the problems in the background art.

The specific technical scheme provided by the invention is as follows:

the invention provides a calibration rubber plug for casing sealing test, which comprises a rubber plug top, wherein the bottom end of the rubber plug top is fixedly connected with a threaded block, the middle part of the top end of the rubber plug top is fixedly connected with a groove A, the inside of the groove A is connected with a movable block A in a sliding manner, the left side of the movable block A is fixedly connected with a groove B, the inside of the groove B is connected with a movable block B in a sliding manner, the left side of the movable block B is fixedly connected with a connecting rod, the right side of the top end of the rubber plug top is fixedly connected with a support plate, the middle part of the top end of the support plate is fixedly connected with an open slot, the left side and the right side of the inside of the open slot are both fixedly connected with slide rails, the surfaces of the slide rails are connected with slide blocks in a sliding manner, a buffer plate is fixedly connected between the slide blocks, the top end of the buffer plate is fixedly connected with a support rod, and the top end of the support rod is fixedly connected with a protection plate.

Optionally, the bottom end of the thread block is fixedly connected with a mounting block.

Optionally, the top end of the connecting rod is fixedly connected with a handle.

Optionally, the left side and the right side of the top end of the groove A are fixedly connected with a baffle A.

Optionally, the left side and the right side of the top end of the groove B are fixedly connected with baffle plates B.

Optionally, a buffer rubber is fixedly installed between the bottom end of the buffer plate and the bottom end of the inside of the open slot.

Optionally, a hydraulic rod is fixedly mounted on both sides of the open slot between the bottom end of the protection plate and the top end of the support plate, and a spring is fixedly mounted on the outer side wall of the hydraulic rod.

The invention has the following beneficial effects:

1. the mounting block is aligned to the opening on the sleeve, then the mounting block is inserted into the opening of the sleeve, the thread block just props against the upper part of the opening, the rubber plug top is rotated clockwise (the rubber plug top is made of stainless steel materials, the structure below the rubber plug top is made of butyl rubber), the thread block is clamped into the opening (threads corresponding to the thread block are arranged inside the opening), the rubber plug can be mounted, after the mounting is completed, when a weight presses the rubber plug downwards, the rubber plug can be completely protected by the protection plate, the weight presses the protection plate firstly, the protection plate drives the support rod to move downwards, the support rod drives the buffer plate to move downwards, the buffer plate drives the slide block to move downwards, the slide block slides downwards along the slide rail, buffer rubber between the bottom end of the buffer plate and the bottom end inside the open slot is extruded, the buffer rubber utilizes the elasticity of the rubber to play a good buffer role, the protection plate also extrudes the hydraulic rod in the downward movement process, the hydraulic rod begins to shrink, the spring also can play a good buffer role, the good buffer role of buffering function of the spring can be realized by utilizing the elasticity of the rubber, the elastic rod to prevent the protection plate from being pressed by the original rubber plug from being pressed in the original elastic rod, the background rubber sleeve from being damaged, the rubber sleeve, the problem that the expansion of the original rubber plug can be quickly recovered to the original elastic weight can be recovered to the original rubber sleeve is solved, and the original elastic weight, and the original rubber sleeve is not easily recovered to the original weight, and the original weight can be recovered by the original rubber sleeve, and the original elastic rod.

2. When the rubber plug is tightly installed, the rubber plug is difficult to rotate by normal bare hands, so that the rubber plug cannot be taken down, the connecting rod is pulled by the handle to move leftwards, the connecting rod drives the moving block B to move leftwards, the moving block B moves leftwards along the groove B, when the moving block B abuts against the baffle B, the moving block B is clamped by the baffle B, the moving block B is prevented from separating from the groove B, when the handle is pulled leftwards, the groove B is pulled to move leftwards, the groove B drives the moving block A to move leftwards (the cross section of the moving block A is the same as that in the groove A, so that the moving block A can move leftwards and rightwards along the groove A, the moving block B and the groove B are the same, the moving block A moves rightwards along the groove A, and when the moving block A abuts against the baffle A, the moving block A is abutted against by the baffle A, prevent that movable block A from breaking away from recess A, formed a long pole (the pole that comprises recess A, recess B and connecting rod) between handle to the plug top middle part like this, because the lever theorem, the power arm is more laborsaving longer more, just so can be through rotating the handle, light rotation that drives the plug, take off the plug from the sleeve pipe, it is very convenient, after using the completion, can promote moving right of handle, promote the original position with the handle, thereby shorten the pole, occupation space not, conveniently dismantle the plug like this, conveniently carry out sleeve pipe seal test calibration more, can effectively solve when dismantling in the background art, if the plug installs when tight, hardly dismantle from the sleeve pipe, thereby the inconvenient problem of sleeve pipe seal test calibration of carrying on.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic overall structure diagram of a calibration rubber plug for casing sealing test according to an embodiment of the present invention;

fig. 2 is an enlarged view of the structures of a moving block a and a moving block B in the calibration rubber plug for the casing sealing test according to the embodiment of the invention;

fig. 3 is an enlarged view of a connection structure of a slide block and a slide rail in a calibration rubber plug for a casing sealing test according to an embodiment of the present invention.

In the figure: 1. pushing a rubber plug; 2. a thread block; 3. mounting blocks; 4. a groove A; 5. moving a block A; 6. a groove B; 7. a baffle A; 8. a moving block B; 9. a connecting rod; 10. a baffle B; 11. a handle; 12. a support plate; 13. an open slot; 14. a slide rail; 15. a slider; 16. a cache board; 17. caching rubber; 18. a support bar; 19. a protection plate; 20. a hydraulic rod; 21. a spring.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

A calibration rubber plug for a casing sealing test according to an embodiment of the present invention will be described in detail with reference to fig. 1 to 3.

Referring to fig. 1, 2 and 3, the calibration rubber plug for the casing sealing test provided by the invention comprises a rubber plug top 1, wherein a threaded block 2 is fixedly connected to the bottom end of the rubber plug top 1, a groove A4 is fixedly connected to the middle part of the top end of the rubber plug top 1, a moving block A5 is slidably connected to the inside of the groove A4, a groove B6 is fixedly connected to the left side of the moving block A5, a moving block B8 is slidably connected to the inside of the groove B6, a connecting rod 9 is fixedly connected to the left side of the moving block B8, a supporting plate 12 is fixedly connected to the right side of the top end of the rubber plug top 1, an open groove 13 is fixedly connected to the middle part of the top end of the supporting plate 12, a slide rail 14 is fixedly connected to the left side and the right side of the inside of the open groove 13, a slide block 15 is slidably connected to the surface of the slide rail 14, a buffer plate 16 is fixedly connected between the slide blocks 15, a supporting rod 18 is fixedly connected to the top end of the buffer plate 16, and a protecting plate 19 is fixedly connected to the top end of the supporting rod 18.

Referring to fig. 1, the bottom end of the thread block 2 is fixedly connected with a mounting block 3, and the mounting block 3 can be inserted into an opening on a sleeve in advance, so that the mounting of the thread block 2 is facilitated.

Referring to fig. 1, the top end of the connecting rod 9 is fixedly connected with a handle 11, and the handle 11 facilitates rotation of the rubber plug.

Referring to fig. 1, the left side and the right side of the top end of the groove A4 are fixedly connected with the baffle plates A7, the baffle plates A7 can well prevent the moving block A7 from sliding out of the groove a,

referring to fig. 1, the left side and the right side of the top end of the groove B6 are fixedly connected with baffle plates B10, and the baffle plates B10 can well prevent the moving block B8 from sliding out of the groove B6.

Referring to fig. 1, a buffer rubber 17 is fixedly installed between the bottom end of the buffer plate 16 and the bottom end inside the open slot 13, and the buffer rubber 17 can play a good buffer role by using the elasticity of rubber.

Referring to fig. 1, hydraulic rods 20 are fixedly mounted on both sides of the open slot 13 between the bottom end of the protection plate 19 and the top end of the support plate 12, and springs 21 are fixedly mounted on outer side walls of the hydraulic rods 20, and the springs 21 play roles of buffering and resetting by utilizing elastic energy of the springs 21.

The embodiment of the invention provides a calibration rubber plug for casing sealing test, wherein an installation block 3 is aligned to an opening on a casing, then the installation block 3 is inserted into the opening of the casing, a thread block 2 just props against the upper part of the opening, at the moment, a rubber plug top 1 (the rubber plug top 1 is made of stainless steel materials and the lower part of the rubber plug top 1 is made of butyl rubber) is rotated clockwise, the thread block 2 is clamped into the opening (threads corresponding to the thread block 2 are arranged in the opening), the rubber plug can be installed, when a heavy object presses the rubber plug downwards after the installation is finished, the protective plate 19 can completely protect the rubber plug, the heavy object presses the protective plate 19 firstly, the protective plate 19 drives a support rod 18 to move downwards, the support rod 18 drives a buffer plate 16 to move downwards, the buffer plate 16 drives a sliding block 15 to move downwards, the sliding block 15 slides downwards along a sliding rail 14, thereby the buffer rubber 17 between the bottom of the buffer board 16 and the bottom inside the open slot 13 is squeezed, the buffer rubber 17 utilizes the elasticity of rubber to play a good buffer role, and the protection board 19 also extrudes the hydraulic rod 20 in the downward moving process, the hydraulic rod 20 begins to shrink, thereby driving the spring 21 to shrink, the spring 21 utilizes the elasticity thereof to play a good buffer role, thereby buffering the pressure, thereby protecting the rubber plug well, preventing the rubber plug from being crushed or pressed into the sleeve to be not taken out easily, when the pressure of the heavy object disappears, the elasticity of the spring 21 can prevent the hydraulic rod 20 from recovering to the original height, thereby driving the protection board 19 to recover to the original height, the buffer rubber 17 utilizes the ductility of the rubber to recover to the original shape rapidly, and aligning the installation block 3 to the opening on the sleeve, then insert installation piece 3 in the sheathed tube opening, at this moment the screw thread piece 2 just in time supports the open-ended top, at this moment clockwise turning plug top 1 (it is required to explain that plug top 1 comprises stainless steel material, the structure is for butyl rubber constitution under the plug top 1), block screw thread piece 2 card in the opening (the opening internally mounted has the screw thread corresponding with screw thread piece 2), can accomplish the installation of plug, after the installation is accomplished, when the plug is pushed down to the heavy object, protection shield 19 can protect the plug completely, the heavy object pushes down protection shield 19 first, protection shield 19 drives the downward movement of bracing piece 18, bracing piece 18 drives the downward movement of buffer board 16, buffer board 16 drives the downward movement of slider 15, slider 15 slide rail 14 slides down, thereby extrude buffer rubber 17 between the bottom of buffer board 16 and the inside bottom of open slot 13, buffer rubber 17 utilizes the elasticity of rubber, can play fine buffer effect, and in-process that protection shield 19 moved down, also can extrude hydraulic stem 20, thereby drive buffer spring 21 to the shrink, thereby it can utilize its elasticity to play fine elasticity to prevent the effect of the buffer rubber plug to press the high ductility of the protection shield, thereby can be recovered to the rubber sleeve 19 can be utilized to the high recovery of the rubber, thereby prevent the rubber plug from being damaged, thereby the high ductility of the rubber sleeve 21 can be recovered to the high elasticity of the rubber.

The calibration rubber plug for the sleeve sealing test comprises a hydraulic rod 20 (model: DP-60 manufacturer: shanghai New Xishan, under the condition that air is in a water pumping pipe of a water pump, negative pressure (vacuum) formed when the pump works is utilized, the negative pressure is lower than the water pressure of a water pumping port under the action of atmospheric pressure, and then the negative pressure is discharged from a water discharging end of the water pump), the electrical components are all products in the prior art, the electrical components are selected, installed and completed by a person skilled in the art according to the use requirement, so that all electrical appliances can normally work, the electrical components are all universal standard components or components known by the person skilled in the art, the structure and the principle of the electrical components are known by the person skilled in the art or known by a conventional experimental method, and the applicant does not make specific limitation here.

It will be apparent to those skilled in the art that various modifications and variations can be made in the embodiments of the present invention without departing from the spirit or scope of the embodiments of the invention. Thus, if such modifications and variations of the embodiments of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to encompass such modifications and variations.

Claims

1. The utility model provides a calibration plug is used in sealed test of sleeve pipe, includes plug top (1), its characterized in that, the bottom fixedly connected with screw thread piece (2) of plug top (1), the inside sliding connection of the top middle part fixedly connected with recess A (4) and recess A (4) of plug top (1) has movable block A (5), the left side fixedly connected with recess B (6) of movable block A (5), the inside sliding connection of recess B (6) has movable block B (8) and movable block B (8) left side fixedly connected with connecting rod (9), the top right side fixedly connected with backup pad (12) of plug top (1) and the top middle part fixedly connected with open slot (13) of backup pad (12), the equal fixedly connected with slide rail (14) of the inside left and right sides of open slot (13) and the surperficial sliding connection of slide rail (14) have slider (15), fixedly connected with buffer board (16) between slider (15), the top fixedly connected with bracing piece (18) and the bracing piece (18) of buffer board (16) has protection shield (19).

2. The calibration rubber plug for the casing sealing test according to claim 1, wherein the bottom end of the thread block (2) is fixedly connected with a mounting block (3).

3. The calibration rubber plug for the casing sealing test according to claim 1, wherein a handle (11) is fixedly connected to the top end of the connecting rod (9).

4. The calibration rubber plug for the casing sealing test according to claim 1, wherein the left and right sides of the top end of the groove A (4) are fixedly connected with baffle plates A (7).

5. The calibration rubber plug for the casing sealing test according to claim 1, wherein the left and right sides of the top end of the groove B (6) are fixedly connected with baffle plates B (10).

6. The calibration rubber plug for the casing sealing test according to claim 1, wherein a buffer rubber (17) is fixedly installed between the bottom end of the buffer plate (16) and the inner bottom end of the open slot (13).

7. The calibration rubber plug for the casing sealing test according to claim 1, wherein a hydraulic rod (20) is fixedly installed on both sides of the open slot (13) between the bottom end of the protection plate (19) and the top end of the support plate (12), and a spring (21) is fixedly installed on the outer side wall of the hydraulic rod (20).