Schlumberger Technology Corporation

Fatma Daou

Diankui Fu

Olga Alexandrovna Minikh

Bernhard Lungwitz

Gregory Kubala

Anthony Loiseau

Bernhard Rudolf Lungwitz

Bernardo Engelke

Adding shapeable particles to drilling fluids may be useful for curing lost circulation. When the shapeable particles are pumped downhole through the drillpipe and the drillbit, they may deform when exposed to shear as they pass through the drillbit nozzles. While circulating back toward the surface they may relax at least partially and assume the shape of cracks or voids they encounter along the formation wall, thereby stopping losses.

Compositons and methods for curing lost circulation

The current application discloses compositions and methods for reducing fluid loss during subterranean operations. COactivated swellable elastomers can be used in subterranean operations to reduce fluid loss. In particular, the current application discloses compositions and methods for reducing lost circulation during drilling and drilling related subterranean operations.

Compositions and methods for reducing fluid loss

The current application discloses compositions and methods for treating a subterranean formation. CO2 swellable elastomers can be used in a treatment fluid to at least partially block a high permeability region, therefore improving the performance of an operation such as matrix stimulation, acidizing, and acid fracturing.

Swellable elastomer and its use in acidizing or matrix stimulation

Well cementing compositions comprise water, an inorganic cement and flexible particles having an average density higher than 1.5 g/cm. The flexible particles may be elastomers. The flexible particles and cement particles may be present in a trimodal particle size distribution. The compositions may be placed in subterranean wells in the context of primary or remedial cementing.

Growing community of inventors

Leblon, Brazil

Fatma Daou