Lost Circulation Drilling Fluids Comprising Elastomeric Rubber Particles and a Method for Decreasing Whole Mud Loss Using Such Composition

摘要

The disclosed invention is a unique drilling fluid composition and method for reducing lost mud circulation in wellbores due to seepage loss into fluid permeable subterranean formations. The drilling fluid composition comprises a variety of shapes and sizes of distinctive unadulterated elastomeric rubber particles derived from the tire retreading (recapping) process. These elastomeric rubber particles are incorporated into an aqueous, hydrocarbon, or synthetic drilling fluid in sufficient amounts as to plug holes, fractures, and fissures, form a mud cake, and thus stem the loss of drilling fluids from the lost circulation zone.

主权项

1. A drilling fluid additive comprising elastomeric rubber sealant material resulting from the by-product of the retreading (recapping) of rubber tires, said particles having a diameter of from 1 to 2,000 microns and length up to 4,000 microns.