Earth boring – well treating – and oil field chemistry – Earth boring – Contains organic component
Reexamination Certificate
2007-09-18
2007-09-18
Tucker, Philip C. (Department: 1712)
Earth boring, well treating, and oil field chemistry
Earth boring
Contains organic component
C507S119000, C507S125000
Reexamination Certificate
active
10656047
ABSTRACT:
An oil-based drilling fluid having a polymer latex capable of providing a deformable latex film on at least a portion of a subterranean sand formation has been discovered to inhibit or control fluid loss and act as a sealing agent when used to drill in sand formations for hydrocarbon recovery operations. Typically, the polymer latex is an aqueous suspension of particles formed by emulsion polymerization that is in turn emulsified into a hydrocarbon base fluid. The polymer particles of suitable size precipitate onto the pores of a subterranean sand formation to at least partial seal the formation with a deformable polymer film.
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C. Stowe, et al., “Laboratory Pore Pressure Transmission Testing of Shale,” AADE National Drilling Technical Conference, 2001, pp. 1-10, AADE 01-NC-HO-44.
British Combined Search and Examination Report for United Kingdom Patent Application No. GB 0114390.8, Oct. 15, 2001.
Clapper Dennis K.
Halliday William S.
Schwertner David
Xiang Tao
Baker Hughes Incorporated
Madan Mossman & Sriram P.C.
Tucker Philip C.
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