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A thermal sealing assembly

A technology of sealing components and seals, which is applied in sealing/isolation, earthwork drilling, wellbore/well components, etc., can solve the problems of loss of sealing performance, achieve stable pressure bearing performance, ensure stability, and promote development Effect

Active Publication Date: 2016-08-17
CHINA NAT OFFSHORE OIL CORP +1
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Problems solved by technology

[0003] The invention provides a sealing assembly for thermal recovery, which can withstand a high temperature of 350°C and a high pressure of 20MPa, and can still withstand a high pressure of more than 15MPa after returning to a low temperature after passing through a high temperature of 350°C, which solves the problem of the seal of conventional thermal recovery packers It can only meet the problem of sealing at high temperature, and then returning to the low temperature state after high temperature and losing the sealing performance

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Embodiment Construction

[0019] In order to facilitate the description of the present invention, the implementation of the technical solutions of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0020] combine figure 1 , figure 2 As shown, the present invention provides a thermal recovery sealing assembly, including a wedging component, a multiple combined sealing component, a mandrel 11, and a base 14, wherein the wedging component and the multiple combined sealing component are sequentially sleeved on the mandrel 11 and can be Sliding on the mandrel 11, the base 14 is mounted on the mandrel 11 adjacent to the multi-combination sealing member. The entire thermal recovery sealing assembly is placed in the casing 15 .

[0021] The wedging part is mainly composed of locking sleeve 1, compression ring 2, inner sealing ring 3, and expansion ring 4; the inner sealing ring 3 is installed in the annular groove formed ...

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Abstract

The invention relates to a thermal recovery seal assembly which can bear the high pressure of 20 MPa or above at the high temperature of 350 DEG C and bear the high pressure of 15 MPa or above after the seal assembly bears the high temperature and then the high temperature is reduced to the low temperature. The thermal recovery seal assembly comprises a wedging component, a double-combined seal component, a mandrel and a base. The mandrel is sequentially sleeved with the wedging component and the double-combined seal component. The wedging component and the double-combined seal component can slide on the mandrel. The base is installed on the mandrel and is close to multiple-combined seal components. According to the thermal recovery seal assembly, the requirement for a thermal recovery packer in offshore thermal recovery well production is met and the thermal recovery seal assembly is suitable for the technical field of oil thermal recovery.

Description

technical field [0001] The invention relates to a sealing assembly for thermal recovery, which belongs to the technical field of petroleum thermal recovery. Background technique [0002] The seal is the core component of the packer in the oil thermal recovery equipment, and the reliability of the seal performance of the packer mainly depends on the seal. Due to the needs of different processes in field operations, the performance requirements for the seals of the packers are also different. For example, the packer used for steam injection needs to withstand a high temperature of 350°C and a high pressure of 15MPa, and the corresponding seals only need to meet a high temperature of 350°C and a high pressure of 15MPa. However, at present, in the production of offshore thermal recovery wells, the seal of the packer is required to withstand a high pressure of 20 MPa at a high temperature of 350°C, and the seal is required to withstand a high pressure of more than 15 MPa when th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B33/122
Inventor 刘花军孙永涛马增华林涛顾启林刘海涛孙玉豹王通胡厚猛
Owner CHINA NAT OFFSHORE OIL CORP
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