知搜-全球专利检索

  1. Login
  2. Sign Up

Search Results

2867 records (took 0.026 seconds)

    System for successively uncovering ports along a wellbore to permit injection of a fluid along said wellbore
    81.
    发明授权
    System for successively uncovering ports along a wellbore to permit injection of a fluid along said wellbore 有权

    公开(公告)号：US11268348B2

    公开(公告)日：2022-03-08

    申请号：US16790679

    申请日：2020-02-13

    Applicant: SC ASSET CORPORATION

    Inventor： David Nordheimer

    IPC: E21B34/14 ,  E21B33/14 ,  E21B34/06 ,  E21B43/26

    Abstract: A system for successively uncovering a plurality of contiguous ports in a tubing liner within a wellbore, or for successively uncovering individual groups of ports arranged at different but adjacent locations along the liner, to allow successive fracking of the wellbore at such locations. Sliding sleeves in the tubing liner are provided, having a circumferential groove therein, which are successively moved from a closed position covering a respective port to an open position uncovering such port by an actuation member placed in the bore of the tubing liner. Each actuation member comprises a dissolvable plug which in one embodiment is retained by shear pins at an uphole end of a collet sleeve, the latter having radially-outwardly biased protuberances (fingers) which matingly engage sliding sleeves having cylindrical grooves therein, based on the width of the protuberance. In one embodiment, when actuating the most downhole sleeve, the shear pin shears allowing the plug to move in the collet sleeve and prevent the protuberance (fingers) from disengaging.

    Systems and methods to remove and re-apply sealant on the annular side of casing
    83.
    发明授权
    Systems and methods to remove and re-apply sealant on the annular side of casing 有权

    公开(公告)号：US11261695B2

    公开(公告)日：2022-03-01

    申请号：US16902090

    申请日：2020-06-15

    Applicant: Saudi Arabian Oil Company

    Inventor： Krzysztof Karol Machocki

    IPC: E21B33/14 ,  E21B29/02 ,  E21B29/10 ,  E21B33/12

    Abstract: Systems and methods for removing and replacing a first sealant in a subterranean well include a running sub located at an end of a running string. A helical guide port extends through the running sub. A port exit of the guide port is at a downhole end of the guide port and extends through a sidewall of the running sub. An inner assembly is extendable through the guide port. A head assembly is located at a drilling end of the inner assembly. The head assembly is sized to pass through the port exit and is oriented to drill a helical path within the first sealant radially exterior of the inner casing and form a void.

    Wellbore cement having polymer capsule shells
    86.
    发明授权
    Wellbore cement having polymer capsule shells 有权

    公开(公告)号：US11236582B2

    公开(公告)日：2022-02-01

    申请号：US16133219

    申请日：2018-09-17

    Applicant: Saudi Arabian Oil Company

    Inventor： Elizabeth Q. Contreras

    IPC: E21B33/14 ,  C09K8/467 ,  C04B24/24 ,  C04B28/04 ,  C04B20/10 ,  E21B47/005 ,  C04B24/28 ,  C04B103/00 ,  C04B111/50

    Abstract: Capsules with a cement additive covered by a polymeric outer shell are added to wellbore cement. The additive is released from the shells by osmosis or shell ruptures. Capillary forces draw the additive into micro-annuli or cracks present in the cement, where the additive seals the micro-annuli and cracks to define a self-sealing material. The empty shells remain in the cement and act as an additive that modifies cement elasticity. The capsules are formed by combining immiscible liquids, where one of the liquids contains a signaling substance, and each of the liquids contains a reagent. When combined, the liquids segregate into a dispersed phase and a continuous phase, with the dispersed phase having the signaling agent. The reagents react at interfaces between dispersed and continuous phases and form polymer layers encapsulating the signaling agent to form the capsules. Adjusting relative concentrations of the reagents varies membrane strength and permeability.

    System and method for intelligent flow control system for production cementing returns
    87.
    发明授权
    System and method for intelligent flow control system for production cementing returns 有权

    公开(公告)号：US11230897B2

    公开(公告)日：2022-01-25

    申请号：US16137515

    申请日：2018-09-20

    Applicant: SPM Oil & Gas PC LLC

    Inventor： Matthew Brady Green

    IPC: E21B21/06 ,  E21B47/06 ,  E21B21/10 ,  E21B33/14 ,  E21B21/08 ,  G01F1/05 ,  E21B47/10

    Abstract: A system and method of controlling and monitoring a cementing process injecting a cement slurry down a well that causes a return of a drilling fluid includes a first and second flowmeters disposed in the primary return conduit configured to generate a flow rate measurements of the returned drilling fluid, a first control valve receiving control signals from a microprocessor to regulate conducting the returned drilling fluid to a reservoir, a choke valve disposed downstream from the first and second flowmeters receiving control signals from a microprocessor to regulate diverting the returned drilling fluid in the primary return conduit in response to a detection of the presence of gas in the returned drilling fluid, and a mud-gas separator disposed in the primary return conduit configured to receive the diverted drilling fluid and separate the diverted drilling fluid into a mud component for return to the reservoir and a gas component for controlled burn off.

    SYSTEM AND METHOD FOR CEMENTING A WELLBORE
    88.
    发明申请
    SYSTEM AND METHOD FOR CEMENTING A WELLBORE 有权

    公开(公告)号：US20220018212A1

    公开(公告)日：2022-01-20

    申请号：US16928250

    申请日：2020-07-14

    Applicant: Saudi Arabian Oil Company

    Inventor： Abdulaziz Al-Somali ,  Ossama Sehsah ,  Tariq Al-Talhi

    IPC: E21B33/14 ,  E21B47/005 ,  E21B47/06 ,  E21B47/07 ,  E21B47/18

    Abstract: Before, during, and after a wellbore cementing operation temperature, pressure, and other conditions of a cement slurry are monitored downhole. The monitored conditions are compared to theoretical or calculated conditions to confirm the cementing operation is carried out in downhole conditions as planned. When differences between the monitored conditions and those used in planning the cementing operation exceed an acceptable range, adjustments are made to the cementing operation to account for the differences. The adjustments include changing a composition of the cement slurry to increase its design temperature, wellbore intervention if monitored pressure reveals a backflow of cement, and proceeding with another cementing stage if the monitored conditions indicate the cement slurry has cured into a set cement.

    STAGE CEMENTING SYSTEM
    89.
    发明申请
    STAGE CEMENTING SYSTEM 有权

    公开(公告)号：US20220003069A1

    公开(公告)日：2022-01-06

    申请号：US17477113

    申请日：2021-09-16

    Applicant: Weatherford Technology Holdings, LLC

    Inventor： Richard Lee GIROUX ,  Jeffery MORRISON ,  Jobby T. JACOB

    IPC: E21B33/14 ,  E21B34/10

    Abstract: A stage cementing system includes a stage cementing assembly having a stage tool. The stage tool has an outer mandrel, an inner mandrel coupled to and disposed inside of the outer mandrel, an annular chamber between the outer mandrel and the inner mandrel, a first outer port through the outer mandrel, and longitudinally spaced first and second inner ports through the inner mandrel. The stage cementing system further includes an inner string assembly configured to be located inside the inner mandrel. The inner string assembly has a tubular body having a central throughbore and longitudinally spaced first and second side ports, a lower external seal element below the first and second side ports, a middle external seal element between the first and second side ports, and an upper external seal element above the first and second side ports.

Patent Agency Ranking