公开(公告)号：US07259130B2

公开(公告)日：2007-08-21

申请号：US10910103

申请日：2004-08-03

Applicant: James E. Griffith ,  Ron D. Nida ,  John L. Dennis, Jr.

Inventor： James E. Griffith ,  Ron D. Nida ,  John L. Dennis, Jr.

IPC: C09K8/40

CPC classification number: C04B28/02 ,  C09K8/467 ,  C09K8/506 ,  C04B22/064 ,  C04B24/08 ,  C04B40/005 ,  C04B40/0075

Abstract: Methods of servicing a wellbore in contact with a subterranean formation include passing an ester-based fluid into the wellbore and reducing a temperature of the ester-based fluid by an amount effective to cause the ester-based fluid to set, e.g., by from about 10° F. to about 20° F. The ester-based fluid includes a water in ester-based oil emulsion, a pH controlling additive, e.g., hydrated lime, in the water-phase, and an emulsifier to stabilize the pH controlling additive. Cooling the ester-based fluid causes the emulsion to destabilize, resulting in the release of the pH controlling additive. This release raises pH of the ester-based fluid by an effective amount to cause it to set. Wellbore servicing fluids comprising the foregoing ester-based fluid may be employed as environmentally friendly sealants or spotting fluids in wellbores.

Abstract translation: 维护与地下地层相接触的井眼的方法包括将酯基流体通入井眼中，并且以有效地使酯基流体凝固的量使酯基流体的温度降低，例如从约 10°F至约20°F。酯基流体包括酯基油乳液中的水，水相中的pH调节添加剂，例如熟石灰，以及稳定pH控制添加剂的乳化剂 。 冷却酯基流体导致乳液不稳定，导致pH控制添加剂的释放。 该释放使酯类流体的pH值提高有效量使其成为固定状态。 包含上述酯基流体的井筒维修流体可以用作在井筒中的环境密封剂或点样液。