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:
May. 16, 2000
Filed:
Jun. 12, 1997
Applicant:
Inventors:
Leonard Michael Haberman, Cypress, TX (US);
James Jang Nahm, Houston, TX (US);
Assignee:
Shell Oil Company, Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09K / ; E21B / ; E21B / ;
U.S. Cl.
CPC ...
507261 ; 507928 ; 166304 ; 166292 ; 166312 ;
Abstract
An aqueous displacement fluid composition is used as a spacer fluid composition to change one type of drilling mud for another type of drilling mud or in cementing operations downhole, to clean downhole hardware in wellbores. The method comprises introducing into a wellbore an aqueous displacement fluid composition, such as a spacer fluid, to displace downhole wellbore fluids, having an improved rate of emulsification and a high capacity for emulsifying hydrocarbons, and aqueous fluid compositions. The aqueous displacement fluid composition introduced into wellbores contain mixtures of: