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    • 9. 发明授权
    • Well treating fluid
    • 处理流体好
    • US4568392A
    • 1986-02-04
    • US483394
    • 1983-04-08
    • Charles R. DawsonNorman N. LiDennis E. O'Brien
    • Charles R. DawsonNorman N. LiDennis E. O'Brien
    • C09K8/50E21B21/00C09K3/00C09K7/00
    • C09K8/50E21B21/003
    • The instant invention is directed to shear thickening fluids which comprise a water-swellable material (clay), present in a sufficient concentration so as to be capable of forming a stiff paste upon interaction with the water used, and water wherein the clay and water are kept separated by an intervening hydrocarbon-surfactant composition. The intervening oil phase prevents the interaction between the water and the clay phases and results in a stable, nonreacting, pumpable composite until such time as the oil envelope is ruptured by application of a sufficiently high shear force. Upon such rupture, the materials interact rapidly forming a semi-rigid stiff paste.Various well-control problems, such as oil and gas with blowouts, can be controlled by use of the above-described composite. The composite is pumped down the well pipe. Exiting the orifices of the drill bit or a nozzle supplies the shear force needed to rupture the oil envelope thereby permitting the interaction between the clay and the water resulting in the formation of a stiff paste which can stop or prevent unwanted flow in or near the wellbore.
    • 本发明涉及剪切增稠流体,其包含水溶胀性材料(粘土),其以足够的浓度存在,以便能够在与所用的水相互作用时形成刚性糊料,以及其中粘土和水是 通过中间的烃 - 表面活性剂组合物保持分离。 中间油相防止水和粘土相之间的相互作用,并导致稳定的,不反应的可泵送复合材料,直到通过施加足够高的剪切力使油封破裂的时间为止。 在这种破裂的情况下,材料相互作用迅速地形成半刚性刚性浆料。 可以通过使用上述复合材料来控制各种井控问题,例如具有井喷的油和气。 将复合材料从井管中抽出。 排出钻头或喷嘴的孔口提供破裂油包壳所需的剪切力,从而允许粘土和水之间的相互作用,导致形成刚性浆料,从而可以阻止或防止在井筒内或附近不必要的流动 。