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Under-well cable wet type butt-joint device for oil well

A docking device and cable docking technology, which is applied to the two-part connecting device, the parts of the connecting device, the coupling device, etc., to achieve the effects of high reliability, easy piping operation, and good straightening effect

Active Publication Date: 2019-11-22
CNOOC ENERGY TECH & SERVICES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This downhole cable connection technology is widely used in the field of horizontal well testing technology. Considering the application occasion, use method and structural form, it can only serve as a reference

Method used

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  • Under-well cable wet type butt-joint device for oil well
  • Under-well cable wet type butt-joint device for oil well
  • Under-well cable wet type butt-joint device for oil well

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Embodiment Construction

[0031]In order to make the present invention easier to understand, the technical solutions and technical effects of the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0032] Such as figure 1 As shown, the downhole cable wet docking device for oil wells of the present invention includes a cable docking male head and a hands-off connector.

[0033] The male cable butt joint includes an oil pipe nipple 101, and the lower part of the oil pipe nipple 101 is threadedly connected with the inner threaded hole of the outlet joint 104 through an external thread. The longitudinal section of the outlet joint 104 is an inverted convex structure, so The outlet joint 104 is set in the middle opening of the upper centering 103, and the top surface of the large-diameter end of the inverted convex structure is pressed against the upper positioning boss in the middle opening, and the upper part of the outer cylinder 105 is plu...

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Abstract

The invention discloses an under-well cable wet type butt-joint device for an oil well. The under-well cable wet type butt-joint device comprises a cable butt-joint male connector and a release joint.When the cable butt-joint male connector is carried by a pipe column to be guided into the release joint of a well, an upper insulation sleeve is arranged on an upper insulation ring in a sleeving mode, thus sealing is achieved between the upper insulation sleeve and the upper insulation ring, a lower insulation sleeve is arranged on a lower insulation ring in a sleeving mode, thus sealing is achieved between the lower insulation sleeve and the lower insulation ring, a conductive sleeve is arranged on a conductive ring in a sleeving mode to form conductive connection, and thus an upper data cable L1 communicates with a lower data cable L2. A locking ball with a spring is inserted into a butt-joint guide head annular groove of a middle hole penetrating through a locking ball seat, and butt-joint locking is achieved. A limiting basket is supported on a receiving basket. The under-well cable wet type butt-joint device has the advantages that the under-well cable wet type butt-joint device has repeated butt-joint ability, long-term stable power supply and communication can be kept after successful butt-joint connection, only the cable butt-joint male connector is pulled out and maintenance is conducted during pump inspection operation, and field operation is facilitated.

Description

technical field [0001] The invention relates to downhole tools in the field of layered oil production in oil fields, in particular to a downhole cable wet-type docking device for oil wells. Background technique [0002] At present, in some blocks of Bohai Oilfield, 7" casing sand control completions account for a certain proportion of production wells. This completion method makes it impossible to implement separate production strings commonly used in offshore Y-type electric pumps, and layered production cannot be realized. Only common combined production can be used. However, with the deepening of oilfield development, the water cut continues to rise, and there is no effective means of water control. As a new technology, the cable-controlled electric pump separate production technology can solve the problem of 7" cased well delamination. However, considering the Due to the limitation of string structure, it is necessary to use downhole cable docking technology, that is, to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B17/02E21B17/046E21B17/042E21B23/00E21B17/00H01R24/00H01R13/631H01R13/52H01R13/502
CPCE21B17/00E21B17/028E21B17/042E21B17/046E21B23/00H01R13/502H01R13/5202H01R13/5205H01R13/5219H01R13/631H01R24/00
Inventor 张凤辉赵仲浩杨万有刘敏张成富邹明华王胜晁圣棋
Owner CNOOC ENERGY TECH & SERVICES
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