Cementing casing strings in deep water offshore wells

Details Cementing casing strings in deep water offshore wells Cementing casing strings in deep water offshore wells

E - Fixed Constructions

21

B

E21B 33/14 (2006.01) C04B 7/00 (2006.01) C04B 28/04 (2006.01) C09K 8/46 (2006.01)

Patent

CA 2313835

The present invention provides improved methods of cementing casing strings in deep water offshore formations penetrated by well bores. The methods are basically comprised of the steps of preparing a cement composition comprised of hydraulic cement, water, gas, a mixture of foaming and foam stabilizing surfactants, a cement early strength accelerator and a mildly set retarding cement dispersing agent, placing the cement composition in the annulus between the casing string and the well bore and allowing the cement composition to set into a hard impermeable mass.

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