发明名称 |
APHRON-CONTAINING WELL DRILLING AND SERVICING FLUIDS |
摘要 |
The invention provides a method and fluid for drilling or servicing a well in a subterranean formation containing lost circulation zones or depleted, low pressure reservoirs. The fluid comprises an aqueous liquid having dispersed therein a polymer which increases the low shear rate viscosity of the fluid to the extent that the thixotropic index of the fluid is at least about 10 and a surfactant, and wherein the fluid contains less than about 15 % by volume of aphrons preferably generated by the turbulence and pressure drop as the fluid exits the drill bit in the vicinity of the formation. The method of drilling a wellbore in a subterranean formation comprises continuously circulating, while drilling, such a drilling fluid.
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申请公布号 |
WO9836151(A1) |
申请公布日期 |
1998.08.20 |
申请号 |
WO1998US02566 |
申请日期 |
1998.02.10 |
申请人 |
ACTISYSTEMS, INC.;BROOKEY, TOMMY, F. |
发明人 |
BROOKEY, TOMMY, F. |
分类号 |
C09K8/20;C09K8/575;E21B21/00;(IPC1-7):E21B21/14;C09K7/00 |
主分类号 |
C09K8/20 |
代理机构 |
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