Actuation of downhole devices
    11.
    发明授权

    公开(公告)号:US11814933B2

    公开(公告)日:2023-11-14

    申请号:US17539565

    申请日:2021-12-01

    CPC classification number: E21B41/0085 E21B2200/08

    Abstract: A method for actuation of a downhole device includes rotating a drill pipe relative to a cylindrical pipe disposed coaxially within the drill pipe. First segments including a first material are disposed on the inner surface of the drill pipe. Second segments including a degradable material are disposed on the outer surface of the cylindrical pipe, with each of the second segments aligned with a corresponding first segment. The first material and the degradable material are insoluble in the downhole fluid, and a solubility of the degradable material in a solvent is greater than a solubility of the first material in the solvent. The method includes generating a first electrical signal pattern during rotation of the drill pipe; introducing the solvent into the drill pipe, in which the degradable material degrades responsive to introduction of the solvent; and generating a second electrical signal pattern after introduction of the solvent.

    SYSTEM AND METHOD FOR PLUGGING A LOST-CIRCULATION ZONE IN A SUBSURFACE FORMATION

    公开(公告)号:US20230193705A1

    公开(公告)日:2023-06-22

    申请号:US17559544

    申请日:2021-12-22

    CPC classification number: E21B21/003 C09K8/426 C09K8/487 E21B33/138

    Abstract: A method for plugging a lost-circulation zone in a subsurface formation includes introducing a drillstem including a drilling stabilizer into a wellbore during drilling operations, the drilling stabilizer including at least stabilizer blades and a pressure sensor. Each stabilizer blade includes at least an inner chamber, a light source, and a window. The method further includes injecting a lost-circulation fluid, including a plurality of lost-circulation particles, into the wellbore. Each lost-circulation particle includes a lost-circulation additive encapsulated by a photo-sensitive coating. The method further includes measuring a pressure differential with the pressure sensor and providing a pressure signal to the light source of each stabilizer blade, thereby actuating the light source to produce a light beam, which allows the light beam to contact the photo-sensitive coatings of the lost-circulation particles to release the lost-circulation additives. The method further includes allowing the lost-circulation fluid to plug the lost-circulation zone.

    FABRICATING DRILL BITS
    17.
    发明公开

    公开(公告)号:US20230366272A1

    公开(公告)日:2023-11-16

    申请号:US17740741

    申请日:2022-05-10

    CPC classification number: E21B10/567 B22F7/062 B33Y80/00 B22F10/14

    Abstract: A method of fabricating a drill bit is described. The method includes forming a mold with interior surfaces defining a mold cavity within the mold, the mold cavity having a shape corresponding to a shape of a body of the drill bit; forming catalyst-free synthesized polycrystalline diamond compact (PDC) cutting elements using an ultra-high pressure and temperature process; determining positions of the catalyst-free synthesized PDC cutting elements within the mold cavity; placing the catalyst-free synthesized PDC cutting elements at the determined positions within the mold cavity; filling the mold cavity with matrix materials of the body of the drill bit; and bonding the catalyst-free synthesized PDC cutting elements with the matrix materials of the body to form an impregnated drill bit.

    METHOD AND APPARATUS FOR DOWNHOLE CHARGING AND INITIATION OF DRILLING MICROCHIPS

    公开(公告)号:US20230184090A1

    公开(公告)日:2023-06-15

    申请号:US17644276

    申请日:2021-12-14

    CPC classification number: E21B47/01 E21B34/142 E21B2200/06

    Abstract: A system includes a sliding sleeve, a ball landing seat, microchips, a ball catcher, and a charging ring. The sliding sleeve is installed within a tubular body. The tubular body has an exit groove. The ball landing seat is formed by the sliding sleeve and is configured to receive a ball. The plurality of microchips are housed in a microchip ring installed within the sliding sleeve. The plurality of microchips are configured to be released into the well to gather data upon reception of the ball in the ball landing seat. The ball catcher is configured to receive and hold the ball after the plurality of microchips are released into the well. The charging ring is electronically connected to the microchip ring and has a circuit, a power source, and a charging coil. The circuit has a voltage regulation chip, a microprocessor, and a circuit motion sensor.

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