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Title:
CASING HEAD AND ANNULUS SEALING DEVICE RUNNING TOOL FOR DEEPWATER DRILLING, AND METHOD FOR USING SAME
Document Type and Number:
WIPO Patent Application WO/2019/205479
Kind Code:
A1
Abstract:
Disclosed is a casing head and annulus sealing device running tool (100) for deepwater drilling. The running tool comprises a spindle (1). The spindle (1) is connected to a hollow suspension structure (3) with an open bottom via a hollow torque transmission structure (2) in a sealed manner; the end of the spindle away from the torque transmission structure slidably passes through a hollow piston (41) capable of being fixed at a subsea wellhead (95); the suspension structure can rotate with the spindle and can slide axially along the piston in a sealed manner; an inner cavity of the torque transmission structure is in communication with an inner cavity of the suspension structure to form a piston cavity (40), and the top of the piston cavity can be in communication with an inner cavity of the spindle; the piston cavity and the piston form a hydraulic piston structure (61); and one end of the suspension structure away from the torque transmission structure can rotatably hook an annulus sealing device (91) and can release same by means of axial lift, and the end of the piston away from the torque transmission structure can be radially opened to hook a casing head (92) and can be radially contracted to release the casing head. The running tool can realize the requirement for installation of the casing head and the annulus sealing device at a subsea wellhead at the bottom of the sea, and has the advantages of fewer installation and construction steps and low cost. Further disclosed is a method for using the casing head and annulus sealing device running tool for deepwater drilling.

Inventors:
WANG, Yanbin (No.18 Fuxue Road, Changping District, Beijing 9, 102249, CN)
GAO, Deli (No.18 Fuxue Road, Changping District, Beijing 9, 102249, CN)
FANG, Jun (No.18 Fuxue Road, Changping District, Beijing 9, 102249, CN)
ZENG, Jing (No.18 Fuxue Road, Changping District, Beijing 9, 102249, CN)
Application Number:
CN2018/107292
Publication Date:
October 31, 2019
Filing Date:
September 25, 2018
Export Citation:
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Assignee:
CHINA UNIVERSITY OF PETROLEUM-BEIJING (No.18 Fuxue Road, Changping District, Beijing 9, 102249, CN)
International Classes:
E21B23/04; F16K11/02
Foreign References:
CN108386146A2018-08-10
CN208184692U2018-12-04
CN102877810A2013-01-16
CN205025395U2016-02-10
CN107387026A2017-11-24
US6148664A2000-11-21
US5655606A1997-08-12
Attorney, Agent or Firm:
BEIJING SANYOU INTELLECTUAL PROPERTY AGENCY LTD. (16th Fl, Block A Corporate Square, No.35 Jinrong Street, Beijing 3, 100033, CN)
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