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High-pressure filter for drilling fluid circulating system

A technology of circulation system and drilling fluid, which is applied in earth-moving drilling, flushing wellbore, wellbore/well components, etc., can solve the problems of downhole equipment and drilling operation loss, etc., and achieve long service life, simple structure, and working stability. Good results

Inactive Publication Date: 2019-06-21
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under special circumstances, if the colloid in the inner layer of high-pressure hoses such as hoses falls off under the impact of strong liquid flow or the filter element breaks off, etc., the drilling fluid will bring these harmful solid substances downhole, causing huge losses to downhole equipment and drilling operations

Method used

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  • High-pressure filter for drilling fluid circulating system
  • High-pressure filter for drilling fluid circulating system
  • High-pressure filter for drilling fluid circulating system

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Embodiment Construction

[0014] In order to make the purpose, technical solution and advantages of the application clearer, the embodiments of the application will be described in detail below in conjunction with the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.

[0015] An exemplary embodiment of the present invention provides a high-pressure filter for drilling fluid circulation system, including a body 1 and a filter element 2, the body 1 includes a housing cavity 13, a male union 11 and a female union 16 , the male union head 11 is set at the front end of the housing cavity 13, the union female head 16 is set at the tail end of the housing cavity 13, and the filter element 2 is fixed in the housing cavity 13 Inside, the surface of the filter element 2 is provided with filter holes, and the body 1 is also provided with a diameter-reducing portion ...

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Abstract

The invention provides a high-pressure filter for a drilling fluid circulating system. The filter comprises a body and a filter element. the body comprises a containing cavity, a union male head and aunion female head, the union male head is arranged at the front end of the containing cavity, the union female head is arranged at the tail end of the containing cavity, the filter element is fixed in the containing cavity, filter holes are formed in the surface of the filter element, a reducing part is further arranged on the body, and the reducing part is arranged between the union male head and the containing cavity. The high-pressure filter is good in working stability, the filter element is arranged in the containing cavity of the body, large-particle solid-phase substances in liquid media such as oil can be effectively filtered, and impurities are prevented from entering a follow-up pipeline to block liquid conveying or cannot establish drilling circulation; the reducing part is arranged between the union male head of the body and the containing cavity and can effectively protect a drilled well, and the situation that the filter element is damaged and falls into a subsequent drilling pipeline is avoided.

Description

technical field [0001] The present application relates to but not limited to drilling fluid circulation system, especially a high-pressure filter used in drilling fluid circulation system. Background technique [0002] In the drilling fluid circulation system of oil drilling rigs, the drilling fluid enters the bottom of the well through drilling pumps, surface manifolds, standpipes, hoses, drilling tools and drill nozzles, etc., and the pressure of the drilling fluid entering the downhole is extremely high. There are no harmful solid substances in the output high-pressure drilling fluid. Under special circumstances, if the colloid in the inner layer of high-pressure hoses such as hoses falls off under the impact of strong liquid flow or the filter element breaks off, etc., the drilling fluid will bring these harmful solid substances downhole, causing huge losses to downhole equipment and drilling operations . Contents of the invention [0003] The application provides a ...

Claims

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Application Information

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IPC IPC(8): E21B21/06
Inventor 李成胜范鹏闫许峰廖易波刘玉杰陆永伟邵振友张震夏川蒋荣星
Owner CHINA NAT OFFSHORE OIL CORP
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