Cylinder unit for constant-pressure tank

A technology of cylinder device and constant pressure tank, which is applied in wellbore/well parts, earthwork drilling, sealing/package, etc. It can solve the problems of easy aging and high price of rubber airbags, and achieve the elimination of constant pressure tank air leakage, Low cost and increased economic benefits

Inactive Publication Date: 2004-06-23
华丽缘
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the defects that the rubber airbag of the imported constant pressure tank cylinder device is easy to age and is expensive, and to provide a practical constant pressure tank cylinder device with simple structure and no need for rubber airbags

Method used

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  • Cylinder unit for constant-pressure tank
  • Cylinder unit for constant-pressure tank

Examples

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Embodiment Construction

[0012] See figure 1 Shown, a constant pressure tank cylinder device. It is characterized in that a piston 3 embedded with an O-ring 6 is installed in the cylinder body 1, and a compression spring 2 and a cylinder head 4 are arranged on the upper part of the piston 3 to make it move axially to form a pre-tightening sealing device. The spherical body of the piston and the head of the pin shaft 5 is flexibly connected with a pressure block 7, the other end of the pin shaft 5 is connected with the constant pressure container 10 by a universal joint 9, and the rubber sealing cover 8 installed on the lower part of the pin shaft 5 is lapped on the constant pressure container. Pressure vessel 10 upper port. In addition, install the dustproof box 11 made of compressible adhesive tape on the bearing pin between the pre-tightening sealing device and the sealing cover. Its working principle is: when the air with a fixed pressure is input from A, the positive pressure moves down through ...

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Abstract

The present invention is cylinder unit for constant-pressure tank for well cementing operation in exploiting petroleum and natural gas. The present invention consists of constant-pressure container, sealing unit to ensure the constant-pressure sealing of the constant-pressure container, seal ensuring unit and sealing cap. The sealing unit includes cylinder, piston and elastic part inside the cylinder, and cylinder head; the seal ensuring unit pinshaft and other parts. The present invention can ensure the constant pressure of the constant pressure tank reliably without leakage, and its use can raise the exploitation quality of oil and gas well.

Description

technical field [0001] The invention belongs to a cylinder device, in particular to a cylinder device used for a constant pressure tank. Background technique [0002] In the cementing operation of exploiting oil or natural gas, if the constant pressure tank device is used, the cementing quality can be guaranteed, thereby improving the quality of oil and gas wells and greatly increasing the oil (gas) production. But because the constant pressure tank relies on imports for a long time, not only the imported constant pressure tank device is expensive, but also the key component—the rubber air bag in the cylinder device has a complicated manufacturing process, and the rubber is easily aged and causes the air bag to leak. The constant pressure tank is in an unstable state and affects the cementing quality. Therefore, in daily oil (natural gas) extraction and production, in order to save the extraction cost, the exploitation of land oil and gas fields is basically not used, and t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/13E21B41/00
Inventor 华丽缘
Owner 华丽缘
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