Measuring and testing – Borehole or drilling – Downhole test
Patent
1990-02-09
1991-10-01
Williams, Hezron E.
Measuring and testing
Borehole or drilling
Downhole test
73 9, 73 60, 73151, G01N 1110
Patent
active
050522191
ABSTRACT:
The process for measuring the coefficients of adhesion and friction of a drilling fluid involves, following the standardized filtration of the drilling fluid or mud from which a solid phase "filtration cake" and a liquid phase or filtrate collected on the downstream side of a filter 15 are obtained, placing a metal piston skirt 29 in contact with a filtration cake in the presence of a contact pressure, and measuring the moments of adhesion and friction when the skirt is driven in axial rotation perpendicular to the contact surface, and the axial extraction or contact adhesion force when the skirt is withdrawn after a determinate period of contact.
REFERENCES:
patent: 1960226 (1934-05-01), Schoenberg
patent: 2691298 (1954-10-01), Cook
patent: 2752778 (1956-07-01), Roberts et al.
patent: 2801537 (1957-08-01), Kabelitz et al.
patent: 4173142 (1979-11-01), Heinz
patent: 4458528 (1984-07-01), Roper et al.
patent: 4557142 (1985-12-01), Hensley et al.
patent: 4601195 (1986-07-01), Garritano
World Oil, vol. 183, No. 1, Jul. 1976, pp. 105-110, S. E. Alford: "New Technique Evaluates Drilling Mud Lubricants".
Fery Jean-Jacques
Patroni Jean-Marc
Miller Craig
Total Compagnie Francaise des Petroles
Williams Hezron E.
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