Bulletin . ssy/?^4$Mi^,ing the mud fluid and forcingit into the sand under pumppressure. Nolan15 cites an abandon-ment job in the East SideCoalinga field, where over 40tons of mud under a pressureof less than 200 pounds waspumped into a 30-foot sand. and three days afterwards ap- j[£:Sv>SS>^peared in a well 400 feet away. $:«&-5^£$:;^ The purposes of mud fluid Figure 4.—Penetration of mud fluid in differ- should not be confused. This ,ent formations- discussion is confined to the action of mud fluid in penetrating porousformations and not to the hydrostatic value of a column of mud fluid
Bulletin . ssy/?^4$Mi^,ing the mud fluid and forcingit into the sand under pumppressure. Nolan15 cites an abandon-ment job in the East SideCoalinga field, where over 40tons of mud under a pressureof less than 200 pounds waspumped into a 30-foot sand. and three days afterwards ap- j[£:Sv>SS>^peared in a well 400 feet away. $:«&-5^£$:;^ The purposes of mud fluid Figure 4.—Penetration of mud fluid in differ- should not be confused. This ,ent formations- discussion is confined to the action of mud fluid in penetrating porousformations and not to the hydrostatic value of a column of mud fluidback of a string of casing in preventing the migration of fluids, forwhich a nonsettling fluid is desired. A fact frequently overlooked isthat mud rapidly settles out of a salt-water mixture no matter howfinely divided it may be. Where mud fluid is used for sealing formations, the necessity ofhaving the fluid free from sand and grit is not apparent. Smallparticles in the fluid may often facilitate the clogging action of thefilter. 14 Kirwan, M. J., Mud fluid in abandonment of well No. 8, American Petroleum Com-pany, sec. 19, T. 20 S., R. 15 E., Coalinga : California State Mining Bureau Bull. 82,1918, pp. 339-341. 16 Nolan, E. D., Use
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectminesandmineralresou
