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:
Oct. 17, 1995
Filed:
Aug. 26, 1993
Reza Hashemi, Sea Cliff, NY (US);
Christophe A Malbrel, New York, NY (US);
Pall Corporation, East Hills, NY (US);
Abstract
An oil or gas well cleaning method includes inserting tubing, such as a coiled tubing, into a well bore, for example, into a production pipe in a well bore. A cleaning fluid containing a flocculant is passed into the well and the flocculant in the cleaning fluid is mixed with solid particles in the well bore to flocculate the particles. The cleaning fluid and the flocculated particles are then removed from the well. In one embodiment, the cleaning fluid containing the flocculant is discharged from the lower end of the tubing into the well, and the cleaning fluid with the flocculated particles is removed from the well via the production pipe. Alternatively, the cleaning fluid containing the flocculant may be introduced into the well through the production pipe, and the cleaning fluid with the flocculated particles may be removed via the tubing. The flocculant may also serve as a friction reducer to reduce friction between the cleaning fluid, the solids, the production pipe, and the tubing.