发明名称 |
FLUID LOSS ADDITIVE FOR WATER BASED DRILLING FLUIDS WITH IMPROVED THERMAL STABILITY |
摘要 |
A polymer microsphere for use as a fluid loss additive in drilling muds including a hydrophobic core of hydrophobic monomers and a hydrophilic shell of hydrophilic monomers wherein the hydrophilic shell surrounds the hydrophobic core. The polymer microsphere is capable of forming micelles or microgels in water without using surfactants and can be block, graft, and random copolymers. The hydrophilic shell is physically or chemically linked to the hydrophobic core. The polymer microsphere further includes crosslinkers, preferably where the crosslinkers are monomers containing at least two ethylenically unsaturated groups. |
申请公布号 |
CA2930985(A1) |
申请公布日期 |
2015.07.02 |
申请号 |
CA20132930985 |
申请日期 |
2013.12.26 |
申请人 |
HALLIBURTON ENERGY SERVICES, INC. |
发明人 |
ZHA, WEIBIN;ZHOU, HUI |
分类号 |
C09K8/24;E21B21/00;E21B21/14 |
主分类号 |
C09K8/24 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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