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    • 8. 发明申请
    • HIGH PRESSURE HIGH TEMPERATURE (HPHT) FLUID LOSS CONTROL AID FOR DRILLING FLUIDS
    • 用于钻井液的高压高温(HPHT)流体损失控制辅助
    • WO00026322A1
    • 2000-05-11
    • PCT/US1999/025474
    • 1999-10-29
    • C09K8/03C09K8/16C09K7/02C09K7/00
    • C09K8/16C09K8/032
    • The invention relates to a composition comprising an HPHT fluid loss control aid, stable at elevated temperatures and which also acts as an excellent shale stabilizer, bore hold lubricant, sealant for depleted sand, and wall cake conditioner. The HPHT fluid loss control aid broadly comprises a uintaite sold under the trade name Gilsonite®, which also contains a surfactant such as a nonionic surfactant. The HPHT fluid loss control aid also contains a solubilized lignite such as causticized lignite and carbon black. The fluid loss control aid reduces HPHT filtrate loss, has good stability at elevated temperatures such as at 300 DEG F, stabilizes troublesome shales and decreases bore hole erosion, helps seal depleted sands, reduces torque and drag, causes no adverse effects on the flow properties of the properly conditioned drilling fluid, and lowers total well costs.
    • 本发明涉及包含HPHT流体损失控制助剂的组合物,其在高温下稳定,并且还用作优异的页岩稳定剂,孔保持润滑剂,用于贫化砂的密封剂和壁蛋糕调理剂。 HPHT流体损失控制辅助剂广泛地包括以商品名Gilsonite出售的uintaite,其还含有表面活性剂如非离子表面活性剂。 HPHT流体损失控制辅助剂还含有溶解的褐煤,例如苛性褐煤和炭黑。 流体损失控制辅助剂可降低HPHT滤液损失,在高温(如300°F)时具有良好的稳定性,稳定麻烦的页岩,减少钻孔侵蚀,有助于密封枯竭砂,减少扭矩和阻力,不会对流动性产生不利影响 的适当调节的钻井液,并降低总井成本。