CN216013065U

CN216013065U - Displacement device for slurry cup of oil well cement thickening instrument

Info

Publication number: CN216013065U
Application number: CN202121002198.9U
Authority: CN
Inventors: 方彬; 张晓宇; 胡梅; 汪霞; 贾晓燕; 赵瑞明; 成俊峰; 陈蒲礼
Original assignee: China Petroleum and Chemical Corp; Sinopec Northwest Oil Field Co
Current assignee: China Petroleum and Chemical Corp; Sinopec Northwest Oil Field Co
Priority date: 2021-05-11
Filing date: 2021-05-11
Publication date: 2022-03-11
Anticipated expiration: 2031-05-11

Abstract

A displacement device for a slurry cup of an oil well cement thickening instrument comprises a supporting structure, a force application structure and a demolding structure, wherein the demolding structure comprises a demolding device and a demolding lining; the supporting structure sequentially comprises a base, a pulp cup seat and a detachable pulp cup gland from bottom to top; the force application structure is arranged between the base and the pulp cup seat, and the base is provided with a force application end which can move along the up-down direction; the stripper is arranged at the force application end; the grout cup seat is provided with a demoulding hole which enables the demoulding device and the force application end to move up and down, the grout cup press cover and the demoulding hole are coaxially provided with a cement mould outlet hole and a demoulding liner ring embedding hole, the diameter of the cement mould outlet hole is not more than the inner diameter of the grout cup, and the demoulding liner ring embedding hole is positioned below the cement mould outlet hole and has a diameter larger than the outer diameter of the grout cup; after the demoulding liner ring is embedded into the embedding hole of the demoulding liner ring, the upper edge of the slurry cup can be just coated; when the force application end moves upwards, the cement paste can be separated from the slurry cup by applying an upward force to the cement paste in the slurry cup through the stripper.

Description

Displacement device for slurry cup of oil well cement thickening instrument

Technical Field

The utility model relates to the technical field of oil well cement tests, in particular to a replacing device for a slurry cup of an oil well cement thickening instrument.

Background

With the development of science and technology, the well cementation cement slurry is applied to more complex underground environment and faces ultrahigh temperature and ultrahigh pressure, and the dry and wet mixed materials of the cement slurry are also different day by day.

In the test for detecting the cement slurry thickening time, the well cementation cement slurry is heated and pressurized to constant temperature and constant pressure in a high-temperature high-pressure thickening instrument, and then in the process of transition stage to thickening, the environment of underground temperature and pressure is simulated, so that the cement slurry forms cement stones with high strength and strong cementing capacity. When the high-temperature and high-pressure thickening instrument needs to take out the slurry cup after the temperature reduction process, cement stones formed after thickening firmly die in the slurry cup, the strength is high, and simultaneously, the cementing capacity is enhanced due to volume expansion, so that the slurry shaft and the paddle in the slurry cup are difficult to take out. The pulp cup is made of soft materials, the pulp cup assembly is expensive to manufacture, and the pulp cup assembly is damaged due to violent disassembly.

The current methods for removing the set cement include an air blowing method and a hard smashing method of violent disassembly. The cement paste is taken out by using an air blowing method, specifically, a slurry cup is fixed in a mould, the bottom of the slurry cup is connected with a nitrogen high-pressure pipe, and the cement paste is ejected out by using high-pressure nitrogen. The method has the disadvantages that the high-pressure gas is difficult to control, the bottom silk of the pulp cup is easy to damage, and the personal safety is endangered. When the hard smashing method of violence disassembly is adopted, the pulp cup, the pulp shaft and the paddle are made of softer materials, the internal flatness of the pulp cup can be damaged by using the sharp tool, the paddle of the pulp shaft is seriously deformed, the thickness jump occurs in a later test, and the data is not true.

In the detection of the thickening time of the cement paste, how to take out the set cement becomes a big problem. Because the materials are changed day by day, the high-temperature and high-pressure test conditions are gradually increased, and the cement stones are more difficult to take out after being formed, the design of the slurry cup replacing device of the oil well cement thickening instrument is particularly important.

SUMMERY OF THE UTILITY MODEL

The utility model provides a displacement device for a slurry cup of an oil well cement thickening instrument, wherein the slurry cup is fixed through a demolding bushing and a slurry cup seat, upward force is applied to a demolding device through a force application structure so that cement is separated from the slurry cup, and then a slurry shaft slurry cup is taken out without damage, so that a slurry cup assembly is greatly protected, the use cost of accessories is reduced, and the personal safety is protected.

The technical scheme of the utility model is as follows:

the displacement device for the oil well cement thickening instrument slurry cup is characterized by comprising a supporting structure, a force application structure and a demolding structure, wherein the demolding structure comprises a demolding device and a demolding lining; the supporting structure sequentially comprises a base, a pulp cup seat and a detachable pulp cup gland from bottom to top; the force application structure is arranged between the base and the pulp cup seat and is provided with a force application end which can move along the up-down direction; the ejector is arranged at the force application end; the grout cup seat is provided with a demoulding hole which enables the demoulding device and the force application end to move up and down, a cement mould outlet hole and a demoulding liner ring embedding hole are coaxially arranged on the grout cup gland and the demoulding hole, the diameter of the cement mould outlet hole is not larger than the inner diameter of the grout cup, and the demoulding liner ring embedding hole is positioned below the cement mould outlet hole and has a diameter larger than the outer diameter of the grout cup; after the demoulding liner ring is embedded into the demoulding liner ring embedding hole, the upper edge of the pulp cup can be just coated; when the force application end moves upwards, the cement paste can be separated from the slurry cup by applying an upward acting force to the cement paste in the slurry cup through the stripper.

Preferably, the force application structure comprises a jack; the jack is driven by an electric hydraulic pump, and a pressure gauge is connected to a pipeline for supplying pressure to the jack by the electric hydraulic pump through a one-way valve.

Preferably, the top of the force application end is provided with a top bracket for placing the ejector, the ejector comprises an ejector disc and a connecting block coaxially fixed below the ejector disc, and the bottom of the connecting block is matched with the top bracket.

Preferably, the diameter of the stripping disc is slightly smaller than the inner diameter of the pulp cup and larger than the diameter of the stripping hole.

Preferably, in the ejector, at least the hardness of the upper surface of the ejector plate is lower than the hardness of the paddle shaft and the paddle of the paddle cup assembly.

Preferably, the demoulding disc is an aluminum demoulding disc or a copper demoulding disc; and/or the release liner is an aluminum release liner or a copper release liner.

Preferably, the supporting structure further comprises a first supporting body supported between the base and the pulp cup seat and a second supporting body supported between the pulp cup seat and the pulp cup gland, the first supporting body, the base and the pulp cup seat jointly form a power supply chamber, and the second supporting body, the pulp cup seat and the pulp cup gland jointly form a pulp cup fixing chamber.

Preferably, the area occupied by the bottom of the pulp cup fixing chamber is smaller than the area occupied by the top of the power supply chamber, and the pulp cup fixing chamber and the power supply chamber are coaxially arranged, so that a shoulder portion convenient for standing appears on the outer side of the pulp cup fixing chamber positioned above the pulp cup fixing chamber, and the shoulder portion is a part of a pulp cup seat positioned on the top of the power supply chamber.

Preferably, the side surface of the pulp cup fixing chamber and/or the power supply chamber is cylindrical or rectangular parallelepiped surrounded by the upright post, and/or the side surface of the pulp cup fixing chamber and/or the power supply chamber is cylindrical or rectangular parallelepiped surrounded by the steel plate.

Preferably, the size of the stripper, the size of the stripping bushing and the size of the detachable pulp cup gland are designed into a plurality of sets according to the inner diameter of the pulp cup.

Compared with the prior art, the utility model has the advantages that: according to the replacing device for the oil well cement thickening instrument slurry cup, the slurry cup is fixed through the demolding bushing and the slurry cup seat, upward force is applied to the demolding device through the force application structure, so that cement is separated from the slurry cup, the slurry shaft slurry cup is taken out without damage, a slurry cup assembly is greatly protected, the use cost of accessories is reduced, the demolding bushing can prevent a slurry shaft paddle from flying out, personal safety is protected, and the replacing device is simple to manufacture, small in investment, small in size, small in occupied space, convenient to use and practical. Wherein application of force structure adopts electronic hydraulic pump drive like hydraulic jack, and the displacement rate is adjustable, convenient to use, and it is simple to maintain the clearance, also can change it into the manual hydraulic pump of convenient transportation. The electric hydraulic pump to be connected with the manometer through the check valve on the pipeline that the jack supplied pressure, be equipped with the check valve before the manometer, the manometer can show displacement pressure when the ejecting instant of thick liquid axle paddle, and then provides the judgement basis for the grout performance, helps experimental data analysis. After the displacement is finished, the pressure release valve is only needed to be opened, the jack is pressed down, and the slurry cup is taken out, so that the displacement efficiency is effectively improved.

Drawings

FIG. 1 is a schematic diagram of the construction of a displacement device for a slurry cup of an oil well cement thickening apparatus of the present invention.

The reference numbers in the figures are: 1-supporting structure, 11-base, 12-pulp cup base, 121-demoulding hole, 13-pulp cup gland, 131-cement demoulding hole, 132-demoulding lining ring embedding hole, 14-first supporting body, 15-second supporting body, 1A-pulp cup fixing chamber, 1B-power supply chamber, 2-force application structure, 211-force application end, 21-jack, 212-top supporting seat, 22-electric hydraulic pump, 23-pressure supply pipeline, 3-demoulding structure, 31-demoulding device, 311-demoulding disc, 312-connecting block, 32-demoulding lining, 4-pulp cup assembly, 41-pulp cup, 42-pulp shaft, 43-blade, 5-one-way valve and 6-pressure gauge.

Detailed Description

In order to facilitate an understanding of the utility model, the utility model is described in more detail below with reference to specific examples.

A displacement device for a slurry cup of an oil well cement thickening instrument comprises a supporting structure 1, a force application structure 2 and a demoulding structure 3, wherein the supporting structure 1 sequentially comprises a base 11, a slurry cup base 12 and a detachable slurry cup gland 13 from bottom to top; the supporting structure 1 further comprises a first supporting body 14 supported between the base 11 and the pulp cup holder 12 and a second supporting body 15 supported between the pulp cup holder 12 and the pulp cup pressing cover 13, the first supporting body 14, the base 11 and the pulp cup holder 12 jointly form a power supply chamber 1B, and the second supporting body 15, the pulp cup holder 12 and the pulp cup pressing cover 13 jointly form a pulp cup fixing chamber 1A. The force application structure 2 is arranged in the power supply chamber 1B between the base 11 and the pulp cup base 12, and when in use, the pulp cup assembly 4 is placed on the pulp cup base 12 in the pulp cup fixing chamber 1A, and the pulp cup 41 of the pulp cup assembly 4 is pressed by the pulp cup pressing cover 13.

The ejector structure 3 includes an ejector 31 and an ejector bush 32; the force application structure 2 is provided with a force application end 211 which can move along the up-down direction; the ejector 31 is arranged at the force application end 211; the grout cup holder 12 is provided with a demoulding hole 121 which enables the demoulding device 31 and the force application end 211 to move up and down, the grout cup gland 13 is provided with a cement mould outlet hole 131 and a demoulding lining ring embedding hole 132 coaxially with the demoulding hole 121, the diameter of the cement mould outlet hole 131 is not more than the inner diameter of the grout cup 41, and the demoulding lining ring embedding hole 132 is positioned below the cement mould outlet hole 131 and has a diameter more than the outer diameter of the grout cup 41; namely, a stepped hole is formed in the pulp cup gland 13, and the upper edge of the pulp cup 41 can be just covered after the demolding bushing 32 is annularly embedded in the demolding bushing ring embedding hole 132; so that the force application end 211 moves upward, the cement paste can be separated from the mortar cup 41 by applying an upward force to the cement paste in the mortar cup 41 by the ejector 31. When the cement paste is separated from the mortar cup 41, the cement paste is broken, and thus the mortar shaft 42 and the paddles 43 are more easily taken out. And because the diameter of the cement demolding hole 131 is not more than the internal diameter of the slurry cup 41, the slurry cup gland 13 can prevent the blade of the slurry shaft from flying out to a certain extent, thereby protecting personal safety.

Then the slurry shaft slurry cup is taken out without damage, the slurry cup assembly is greatly protected, the use cost of accessories is reduced, the demolding bushing can prevent the slurry shaft paddle from flying out, the personal safety is protected, the manufacturing is simple, the investment is low, the size is small, the occupied space is small, and the device is convenient and practical. Wherein application of force structure adopts electronic hydraulic pump drive like hydraulic jack, and the displacement rate is adjustable, convenient to use, and it is simple to maintain the clearance, also can change it into the manual hydraulic pump of convenient transportation. The electric hydraulic pump is connected with the pressure gauge through the one-way valve on the pipeline that the jack supplied pressure, is equipped with the one-way valve before the pressure gauge, after the replacement, only need open the relief valve, push down the jack, take out the thick liquid cup can, effectual improvement replacement efficiency

Preferably, the force application structure 2 comprises a jack 21; the jack 21 is driven by an electric hydraulic pump 22, and a pressure supply pipeline 23 for providing power for the jack 21 by the electric hydraulic pump 22 is connected with a pressure gauge 6 through a one-way valve 5. When the propeller shaft 42 and the paddle 43 are ejected out or cement stones are broken, the pressure gauge 6 can display displacement pressure, so that judgment basis is provided for cement slurry performance, and experimental data analysis is facilitated.

Preferably, the top of the force application end 211 is provided with a top bracket 212 for placing the ejector 31, the ejector 31 comprises an ejector plate 311 and a connecting block 312 coaxially fixed below the ejector plate 311, and the bottom of the connecting block 312 is matched with the top bracket 212. In the ejector 31, at least the upper surface of the ejector plate 311 has a hardness lower than the hardness of the paddle shaft 42 and the paddle 43 of the paddle cup assembly 4. Since the paddle shaft 42 and the paddle 43 are generally made of steel, the stripper plate 311 is preferably made of aluminum or copper; the release liner 32 is preferably an aluminum release liner or a copper release liner.

Preferably, the diameter of the demoulding disc 311 is slightly smaller than or equal to the inner diameter of the grout cup 41 and larger than the diameter of the demoulding hole 121, so as to position the demoulding disc 311 of the stripper 31 at the demoulding hole 121 and to maximize the ejection of cement stones in the grout cup 41.

Preferably, the area occupied by the bottom of the cup fixing chamber 1A is smaller than the area occupied by the top of the power supply chamber 1B, and the cup fixing chamber 1A and the power supply chamber 1B are coaxially arranged so that a shoulder portion for standing conveniently appears on the outer side of the upper cup fixing chamber 1A, which is a part of the cup holder 12 located on the top of the power supply chamber 1B. Preferably, the sides of the pulp cup fixing chamber 1A and the power supply chamber 1B are in a shape of a coaxially arranged rectangular parallelepiped surrounded by 4 columns, and the length and width of the pulp cup fixing chamber 1A are both 20 to 60 cm smaller than those of the power supply chamber 1B.

Or the sides of the pulp cup fixing chamber 1A and the power supply chamber 1B are coaxially arranged in a cylindrical shape formed by surrounding steel plates, and the radius of the pulp cup fixing chamber 1A is 20-60 cm smaller than that of the power supply chamber 1B.

Preferably, the size of the ejector 31, the size of the ejector bush 32, and the size of the removable pulp cup cover (particularly, the diameter of the cement outlet hole 131 and the ejector bush ring insertion hole 132) can be designed into a plurality of sets according to the size of the inner diameter and the outer diameter of the pulp cup, so that the removable pulp cup cover can be suitable for pulp cups with different sizes.

It should be noted that the above-described embodiments may enable those skilled in the art to more fully understand the present invention, but do not limit the present invention in any way. Therefore, although the present invention has been described in detail with reference to the drawings and examples, it will be understood by those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the utility model.

Claims

1. The displacement device for the oil well cement thickening instrument slurry cup is characterized by comprising a supporting structure, a force application structure and a demolding structure, wherein the demolding structure comprises a demolding device and a demolding lining; the supporting structure sequentially comprises a base, a pulp cup seat and a detachable pulp cup gland from bottom to top; the force application structure is arranged between the base and the pulp cup seat and is provided with a force application end which can move along the up-down direction; the ejector is arranged at the force application end; the grout cup seat is provided with a demoulding hole which enables the demoulding device and the force application end to move up and down, a cement mould outlet hole and a demoulding liner ring embedding hole are coaxially arranged on the grout cup gland and the demoulding hole, the diameter of the cement mould outlet hole is not larger than the inner diameter of the grout cup, and the demoulding liner ring embedding hole is positioned below the cement mould outlet hole and has a diameter larger than the outer diameter of the grout cup; after the demoulding liner ring is embedded into the demoulding liner ring embedding hole, the upper edge of the pulp cup can be just coated; when the force application end moves upwards, the cement paste can be separated from the slurry cup by applying an upward acting force to the cement paste in the slurry cup through the stripper.

2. The well cement thickening instrument slurry cup displacement apparatus of claim 1, wherein said force applying structure comprises a jack; the jack is driven by an electric hydraulic pump, and a pressure gauge is connected to a pipeline for supplying pressure to the jack by the electric hydraulic pump through a one-way valve.

3. The displacement device for oil well cement thickening instrument slurry cup according to claim 1 or 2, wherein the top of the force application end is provided with a top bracket for placing the stripper, the stripper comprises a stripper plate and a connecting block coaxially fixed below the stripper plate, and the bottom of the connecting block is matched with the top bracket.

4. The displacement apparatus for an oil well cement thickening instrument slurry cup according to claim 3, wherein the diameter of the stripper plate is slightly smaller than the inner diameter of the slurry cup and larger than the diameter of the stripper hole.

5. The apparatus for displacing a cup in an oil well cement thickening instrument of claim 3, wherein at least the upper surface of the stripper plate in the stripper has a hardness lower than the hardness of the paddle shaft and paddle of the cup assembly.

6. The displacement apparatus for an oil well cement thickening instrument slurry cup according to claim 3, wherein the stripper plate is an aluminum stripper plate or a copper stripper plate; and/or the release liner is an aluminum release liner or a copper release liner.

7. The apparatus of claim 1, wherein the support structure further comprises a first support body supported between the base and the slurry cup holder, and a second support body supported between the slurry cup holder and the slurry cup gland, the first support body, base and slurry cup holder collectively comprising a power supply chamber, and the second support body, slurry cup holder and slurry cup gland collectively comprising a slurry cup holding chamber.

8. The well cement thickening instrument slurry cup displacement apparatus of claim 7, wherein the bottom of the slurry cup holding chamber occupies an area smaller than the top of the power supply chamber, and the slurry cup holding chamber and the power supply chamber are coaxially arranged such that a shoulder portion for standing is present on the outside of the slurry cup holding chamber located above, the shoulder portion being a part of a slurry cup seat located on the top of the power supply chamber.

9. The apparatus for replacing a slurry cup in an oil well cement thickening instrument according to claim 7, wherein the side surface of the slurry cup holding chamber and/or the power supply chamber is cylindrical or rectangular parallelepiped surrounded by a pillar, and/or the side surface of the slurry cup holding chamber and/or the power supply chamber is cylindrical or rectangular parallelepiped surrounded by a steel plate.

10. The apparatus for displacing a mud cup of an oil well cement thickening instrument according to claim 1, wherein the dimensions of the stripper, the stripper bushing and the removable mud cup gland are designed in sets according to the internal diameter of the mud cup.