Apparatus and methods for tubular makeup interlock

a makeup interlocking and tubular technology, applied in the direction of drilling casings, well accessories, pipes, etc., can solve the problems of increasing the likelihood of thread damage, increasing the potential for downtime, and wasting time in the process of connecting and disconnecting the casing using the thread connection, so as to prevent the inadvertent release of the tubular or the tubular string
US20080264648A1Inactive Publication Date: 2008-10-30WEATHERFORDLAMB
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
WEATHERFORDLAMB
Publication Date
2008-10-30
Estimated Expiration
Not applicable · inactive patent

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Abstract

Apparatus and methods are provided to prevent an operator from inadvertently dropping a string into a wellbore during assembling and disassembling of tubulars. In one embodiment, an interlock system is used to control the operations of a gripping apparatus connected to the top drive and a spider such that at least one of the top drive or the spider retains the tubular. The interlock system allows the spider to open when the gripping apparatus is supporting a load of the tubular or is in position to support a load of the tubular.
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Description

CROSS REFERENCE TO RELATED APPLICATIONS

[0001] This application claims benefit of U.S. Provisional Patent Application Ser. No. 60 / 926,502, filed Apr. 27, 2007, which application is incorporated herein by reference in its entirety.BACKGROUND OF THE INVENTION

[0002] 1. Field of the Invention

[0003] The present invention relates to an apparatus and methods for facilitating the connection of tubulars. More particularly, the invention relates to an interlock system for use with two or more tubular holding apparatus during the assembly or disassembly of tubulars. More particularly still, the invention relates to an interlock system for use with a top drive and a spider during the assembly or disassembly of tubulars.

[0004] 2. Background of the Related Art

[0005] It is known in the industry to use top drive systems to rotate a drill string to form a borehole. Top drive systems are equipped with a motor to provide torque for rotating the drilling string. The quill of the top drive is typically thread...

Claims

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