Invention Grant
- Patent Title: Downhole tubing swivels and related methods
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Application No.: US14561853Application Date: 2014-12-05
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Publication No.: US09932778B2Publication Date: 2018-04-03
- Inventor: Marcel Obrejanu
- Applicant: Premium Artificial Lift Systems Ltd.
- Applicant Address: CA Calgary
- Assignee: Premium Artificial Lift Systems Ltd.
- Current Assignee: Premium Artificial Lift Systems Ltd.
- Current Assignee Address: CA Calgary
- Agency: Wolf, Greenfield & Sacks, P.C.
- Main IPC: E21B17/05
- IPC: E21B17/05 ; E21B23/01 ; E21B21/02 ; E21B17/10 ; E21B19/16 ; E21B33/04

Abstract:
A top sub, for connection to a tubing string of a production well, has a first engagement structure, and a mandrel has a second engagement structure. A coupling engages the first and second engagement structures. A housing covers an internal space of the tubing swivel, in which the coupling is located. The coupling includes a first coupling structure having a shape complementary to a shape of the first engagement structure and a second coupling structure having a shape complementary to a shape of the second engagement structure. One of (i) the first engagement structure and the first coupling structure and (ii) the second engagement structure and the second coupling structure has a clutch mechanism to enable the top sub to be rotated in a first direction relative to the mandrel and to rotate the mandrel with rotation of the top sub in a second direction opposite the first direction.
Public/Granted literature
- US20160160576A1 DOWNHOLE TUBING SWIVELS AND RELATED METHODS Public/Granted day:2016-06-09
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