Internal breaker for oilfield fluids

Details Internal breaker for oilfield fluids Internal breaker for oilfield fluids

E - Fixed Constructions

21

B

E21B 43/25 (2006.01) C09K 8/524 (2006.01) C09K 8/68 (2006.01)

Patent

CA 2662483

Delayed breakers are given that break viscoelastic surfactant fluids inside the pores of formations into which the fluids have been injected. The breakers comprise proteins, proteins that contain breakers, or cells that contain breakers. Proteins become breakers, and proteins and cells release breakers, due to a triggering mechanism that may be, for example, a change in temperature, pH, or salinity.

La présente invention concerne des agents de rupture à retardement qui permettent de rompre des fluides tensioactifs viscoélastiques à l'intérieur des pores de formations dans lesquelles les fluides ont été injectés. Ces agents de rupture comprennent des protéines, des protéines qui contiennent des agents de rupture ou des cellules qui contiennent des agents de rupture. Des protéines deviennent des agents de rupture et des protéines et des cellules libèrent des agents de rupture suite à un mécanisme de déclenchement qui peut être par exemple une variation de température, de pH ou de salinité.

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