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Electrical & Fluid Disconnect with Fluid Drain

IP.com Disclosure Number: IPCOM000242364D
Publication Date: 2015-Jul-09
Document File: 3 page(s) / 133K

Publishing Venue

The IP.com Prior Art Database

Abstract

Downhole tools that have field-joints containing both hydraulic and electrical connections are historically prone to electrical failure due to fluid accumulation across electrical contacts during disconnect. This invention reduces the likelihood of fluid-related electrical failure by employing a disconnect sequence and a number of drain features designed to promote adequate drainage during disconnect of the joint.

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OPE4-58644-US

Title:  Electrical & Fluid Disconnect with Fluid Drain

Abstract:  Downhole tools that have field-joints containing both hydraulic and electrical connections are historically prone to electrical failure due to fluid accumulation across electrical contacts during disconnect.   This invention reduces the likelihood of fluid-related electrical failure by employing a disconnect sequence and a number of drain features designed to promote adequate drainage during disconnect of the joint.

Description:  The purpose of the invention is to reduce a common mode of electrical failure in downhole tool field-joints (which contain both electrical connections and fluid couplings) whereby fluid accumulates across electrical contacts and arcs or shorts electronics.  Increased reliability is accomplished by a disengagement sequence in combination with a number of seals and fluid drain-paths as herein described.  The invention consists of an upper (uphole) segment (1), and a lower (downhole) segment (2), which are shown disengaged in fig 1a and 1b, fully engaged in fig. 2, and slightly engaged in fig. 3, whereby the top of one downhole tool section engages and seals to the bottom of the downhole tool section above it.  Referring to fig 1a and 1b, the features of the upper segment include the tool body (3), a threaded ring or collar (4) used to engage or disengage the joint, at least one main sealing element (5), and a sealed electrical connector (6) with a number of electrical contacts (7).  The lower segment includes an outer housing and receptacle(s) (8), for the features of the upper segment fig. 1b is an oblique view looking into the bottom of the lower segment (2), and showing a number of rotational alignment features (9), which guide the upper and lower segments together while the joint is partly engages and prevent relative rotation while the joint is fully engaged. Fig.2 and 3 show internal features including a number of rotational alignment features (9), with their corresponding receptacles (10), an upper and lower fluid check mechanism (11) and (12) with their receptacle(s) (13) , and upper and lower mating electrical connectors (14) and (15).  Fig. 4 shows a separate detail of the upper and lower fluid checks.  The fluid checks consist of a sealing member (16) which seals on a surface (17).  The seal (16) is attached to a movable poppe...