A method for replacing high-pressure valves under pressure
A technology for high-pressure valves and valve replacement, which is applied in earthwork drilling, wellbore/well valve devices, wellbore/well components, etc., which can solve the problems that endanger production safety and human health, the surrounding environment and the injury of operators, and affect the wellhead Problems such as production capacity can be solved to achieve the effect of improving operation efficiency, shortening operation time and providing safety
Active Publication Date: 2019-11-19
JIANGSU JINSHI MACHINERY GROUP
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Problems solved by technology
Therefore, it causes environmental pollution and endangers production safety and human health.
Usually, this kind of problem needs to be dealt with by well killing operation, but the processing time is long, the safety factor is low, and it consumes a lot of manpower and material resources, and the well killing operation may affect the original production capacity of the wellhead
Once the leak is not repaired in time or the wellhead is out of control, it will cause irreversible damage to the surrounding environment and operators
Method used
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[0034] In order to make the above objects, features and advantages of the present invention more obvious and comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0035] In the following description, a lot of specific details are set forth in order to fully understand the present invention, but the present invention can also be implemented in other ways different from those described here, and those skilled in the art can do it without departing from the meaning of the present invention. By analogy, the present invention is therefore not limited to the specific examples disclosed below.
[0036]Second, "one embodiment" or "an embodiment" referred to herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. "In one embodiment" appearing in different places in this specification does not all refer to t...
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The invention discloses a method for replacing a high-pressure valve, comprising driving a first lifting mechanism to move downward so that a packer mechanism is inserted into an oil pipe of a wellhead device; Removing the valve to be replaced connected with the upper end of the wellhead device, and lifting the valve to be replaced connected with the second lifting mechanism and the lower end of the second lifting mechanism through a supporting mechanism to separate the second lifting mechanism from the wellhead device; A temporary fixing mechanism is arranged on the wellhead device to press and fix the packaging mechanism in the tubing, and simultaneously the supporting mechanism, the first lifting mechanism, the second lifting mechanism and the valve to be replaced at the lower end thereof are taken out in an integral form, and are separated from the wellhead device; Replace the valve to be replaced in the separated and taken-out entirety with a new valve and reinstall it on the wellhead unit. The invention can replace the valve or the gasket ring of the wellhead device under the condition of pressure, and can safely and quickly deal with the problem of leakage of the on-site valve, the gasket ring and other parts.
Description
technical field [0001] The invention relates to the field of wellhead operation under pressure, in particular to a method for replacing a high-pressure valve under pressure. Background technique [0002] Due to the long-term exploitation of domestic oil and gas fields, various corrosions and aging of seals have occurred in wellhead devices, resulting in varying degrees of leakage of valves, gasket rings and other components. Therefore, it causes environmental pollution and endangers production safety and human health. Usually, such problems need to be dealt with by well killing operation, but the treatment time is long, the safety factor is low, and a lot of manpower and material resources are consumed, and the original production capacity of the wellhead may be affected after the well killing operation. Once the leak is not repaired in time or the wellhead is out of control, it will cause irreversible damage to the surrounding environment and operators. Contents of the i...
Claims
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IPC IPC(8): E21B23/00E21B34/02
CPCB25B27/24
Inventor 殷绎如邹勇仲剑波
Owner JIANGSU JINSHI MACHINERY GROUP