会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 37. 发明申请
    • WELLBORE FLUID
    • 井底流体
    • WO2009047480A1
    • 2009-04-16
    • PCT/GB2008/003237
    • 2008-09-24
    • BP EXPLORATION OPERATING COMPANY LIMITEDSAWDON, Christopher Alan
    • SAWDON, Christopher Alan
    • C09K8/10C09K8/20C09K8/24C09K8/52C09K8/86C09K8/68
    • C09K8/514C09K8/10C09K8/206C09K8/28C09K8/52C09K8/68C09K8/90C09K2208/08C09K2208/18
    • A method of carrying out a wellbore operation, which includes the steps of: (a) introducing into a wellbore an aqueous-based wellbore fluid comprising: - an aqueous base fluid having a first level of salinity; and - at least one polymer dissolved in said aqueous base fluid at a concentration of at least 1.Og/1, said polymer (i) having a viscosity average molecular weight in the range of from 20,000 to 900,000; and (ii) having a molecular structure such that the polymer chains dissolved in said wellbore fluid adopt a globular conformation, while in a fluid of a second level of salinity, said second level being a lower level of salinity than said first level, the polymer chains adopt an extended conformation; (b) allowing a filter-cake including said polymer in globular conformation to form; and subsequently (c) bringing a second fluid into contact with the filter-cake, said second fluid having a level of salinity which is lower than the level of salinity of said aqueous base fluid such that said polymer chains in said filter-cake adopt an extended conformation, thereby increasing the permeability of said filter-cake. The invention also provides novel compositions for use in the method of the invention.
    • 一种进行井眼操作的方法,其包括以下步骤:(a)向井筒中引入含水基井筒流体,其包括: - 具有第一盐度水平的含水基液; 和 - 至少一种以至少1.0g / l的浓度溶于所述含水基础液体中的聚合物,所述聚合物(i)的粘均分子量为20,000至900,000; 和(ii)具有分子结构,使得溶解在所述井筒流体中的聚合物链采用球形构象,而在第二水平盐度的流体中,所述第二水平比所述第一水平低的盐度水平,所述聚合物 链采用扩展构象; (b)使含有球状构象的所述聚合物的滤饼形成; 并且随后(c)使第二流体与滤饼接触,所述第二流体的盐度水平低于所述含水基础流体的盐度水平,使得所述滤饼中的所述聚合物链采用 扩展构象,从而增加所述滤饼的渗透性。 本发明还提供了用于本发明方法的新型组合物。
    • 39. 发明申请
    • SHALE HYDRATION INHIBITION AGENT AND METHOD OF USE
    • WO2006041898A3
    • 2006-04-20
    • PCT/US2005/035789
    • 2005-10-04
    • M-I L.L.C.
    • PATEL, Arvind, D.STAMATAKIS, Emanuel
    • C09K8/06C09K8/86
    • A water-base fluid for use in drilling, cementing, workover, fracturing and abandonment of subterranean wells through a formation containing shale which swells in the presence of water. In one illustrative embodiment, the drilling fluid is composed of an aqueous based continuous phase, a weighting agent, and a shale hydration inhibition agent. The shale hydration inhibition agent should have the general formula (I): in which R and R' independently selected from hydrogen, methyl, ethyl or propyl, and X has a value from 1 to 6. The shale hydration inhibition agent is present in sufficient concentration to substantially reduce the swelling of shale drilling cuttings upon contact with the drilling fluid. The drilling fluid may be formulated to include a wide variety of components of aqueous based drilling fluids, such as weighting agents, fluid loss control agents, suspending agents, viscosifying agents, rheology control agents, as well as other compounds and materials known to one of skill in the art. The fluids may also be used in fracturing and the disposal by reinjection of drilling cutting into a selected subterranean disposal formation.