The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 02, 2003
Filed:
May. 26, 2000
Applicant:
Inventors:
Mark Carmichael, Jersey, GB;
Paul Howlett, Aberdeen, GB;
Assignee:
SPS-AFOS International Limited, Aberdeen, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B 1/710 ; E21B 3/106 ; E21B 3/700 ;
U.S. Cl.
CPC ...
E21B 1/710 ; E21B 3/106 ; E21B 3/700 ;
Abstract
Apparatus which can collect loose debris, particularly ferrous debris, has a body with upper and lower stabiliser sleeve. The body has a one or more integral magnets or magnetic areas . In one embodiment the magnets are located in a first and second row on a split sleeve and are covered by a protective stainless steel sleeve . The apparatus may alternatively comprise magnetic scraper blades or a magnetic sub. The magnets are selectively activated. There is also described a method of trapping or retaining debris in a well bore.