Drill-in fluid compositions and methods

    公开(公告)号:US12018206B2

    公开(公告)日:2024-06-25

    申请号:US18061820

    申请日:2022-12-05

    CPC classification number: C09K8/08 C09K8/514 E21B21/003

    Abstract: Drill-in fluids disclosed herein comprise an aqueous base fluid, a viscosifier, a fluid loss control additive, and a degradable bridging agent comprising a degradable high strength polymetaphosphate material capable of undergoing an irreversible degradation downhole. The present disclosure further relates to a method for controlling fluid loss through a subterranean surface by using the drill-in fluid for form a filter cake on the subterranean surface. Also provided is a method of degrading a filter cake with an aqueous fluid or aqueous acidic fluid, wherein the filter cake is produced from the drill-in fluid. Further provided is a specific order of addition of constituents of the drill-in fluid, which results in improved filter cake performance and/or filter cake removal.

    BRIDGING PARTICLE AND FLUID LOSS CONTROL AGENT

    公开(公告)号:US20240132772A1

    公开(公告)日:2024-04-25

    申请号:US18382964

    申请日:2023-10-22

    CPC classification number: C09K8/514 C09K8/516 C09K2208/18

    Abstract: Novel completion fluid compositions for fluid loss control during completion conducted on a wellbore penetrating a subterranean formation are disclosed. In particular, the composition described herein has an aqueous base fluid, a suspension polymer, a fluid loss control additive, and a degradable bridging agent. These novel compositions provide a means to temporarily seal a wellbore communicating with a subterranean formation to enable completion or workover operations to be performed, after which the composition can be removed by contact with a mild clean-up composition.

    DRILL-IN FLUID COMPOSITIONS AND METHODS
    16.
    发明公开

    公开(公告)号:US20230174840A1

    公开(公告)日:2023-06-08

    申请号:US18061820

    申请日:2022-12-05

    CPC classification number: C09K8/08 C09K8/514 E21B21/003

    Abstract: Drill-in fluids disclosed herein comprise an aqueous base fluid, a viscosifier, a fluid loss control additive, and a degradable bridging agent comprising a degradable high strength polymetaphosphate material capable of undergoing an irreversible degradation downhole. The present disclosure further relates to a method for controlling fluid loss through a subterranean surface by using the drill-in fluid for form a filter cake on the subterranean surface. Also provided is a method of degrading a filter cake with an aqueous fluid or aqueous acidic fluid, wherein the filter cake is produced from the drill-in fluid. Further provided is a specific order of addition of constituents of the drill-in fluid, which results in improved filter cake performance and/or filter cake removal.

    COMPOSITIONS WITH INCREASED ELECTRICAL CONDUCTIVITY

    公开(公告)号:US20220017737A1

    公开(公告)日:2022-01-20

    申请号:US17368278

    申请日:2021-07-06

    Abstract: Thermoset bulk molding compounds (BMC) useful for making electrically conductive components such as bipolar plates for fuel cells are described. The thermoset bulk molding compounds incorporate graphene nanoplatelets to increase the through-plane electrical conductivity by at least 20% compared to BMCs without the graphene nanoplatelets. Additionally, these compositions have low shrinkage, low density for lightweight parts, and are easily processed. The compositions can be used to prepare a variety of electrically conductive components, including bipolar plates for fuel cells and chemical storage batteries that operate at temperatures of less than 100° C.

    ANTI-CAKING OR BLOCKING AGENT FOR TREATING SOLID ACID PRECURSOR ADDITIVES USED IN TREATING SUBTERRANEAN FORMATIONS

    公开(公告)号:US20210403800A1

    公开(公告)日:2021-12-30

    申请号:US17355984

    申请日:2021-06-23

    Abstract: Degradable material for treatment fluids for use in fluid loss control, diversion, and plugging operations, methods of preparing the degradable material, and methods of using the degradable material in treatment fluids are disclosed. The degradable materials are polymer-based solid acid precursor particles that have been partially or fully coated with an anti-caking agent to prevent agglomeration of the polymer-based solid acid precursor particles during storage and transport. These coated polymer-based solid acid precursor particles can then be added to a variety of treatment fluids to temporarily create a physical barrier to fluid flow before degrading and generating acids that can be used in other treatment operations. This degradable coated polymer-based solid acid precursor additive can be combined with other traditional downhole additives such surfactants, viscosifiers, and biocides, allowing for a wide variety of applications in hydrocarbon reservoirs.

    WEIGHTED FLUID LOSS CONTROL PILL FOR COMPLETION & WORKOVER OPERATIONS

    公开(公告)号:US20210032527A1

    公开(公告)日:2021-02-04

    申请号:US16934494

    申请日:2020-07-21

    Inventor: BRADLEY L. TODD

    Abstract: Novel completion fluid compositions for fluid loss control during completion and workover operations conducted on a wellbore penetrating a subterranean formation are disclosed. In particular, the composition is a weighted brine fluid having a polymetaphosphate composition, a biopolymer suspension agent, and a fluid loss control additive. These novel compositions provide a means to temporarily seal a wellbore communicating with a subterranean formation to enable completion or workover operations to be performed, after which the composition can be removed by contact with an acidic composition.

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