Quill saver sub

Details Quill saver sub Quill saver sub

2006-04-18

2009-06-09

Bomar, Shane (Department: 3676)

Wells

Processes

Assembling well part

C166S077510, C175S320000

Reexamination Certificate

active

07543650

ABSTRACT:
A saver sub assembly has a body capable of coupling with a quill, and a split ring capable of coupling with the quill and the body and capable of keeping the quill and body together. The body has splines to prevent relative rotation between the quill and the body. The body may be hollow, and/or have a split ring retainer to maintain the position of the split ring. The saver sub assembly may also have one or more O-rings positioned between the body and the quill. The body of the saver sub assembly may have a threaded pin for engaging a drill string.

REFERENCES:
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patent: 5544712 (1996-08-01), McEwen et al.
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patent: 6220363 (2001-04-01), Dallas
patent: 6845826 (2005-01-01), Feld et al.
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patent: 2005/0274508 (2005-12-01), Folk et al.
patent: 2005/0279507 (2005-12-01), Folk et al.
International App. No. PCT/US 06/14472/ Intl. Search Report and Written Opinion mailed Apr. 18, 2006.

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