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    41.
    发明专利
    未知

    公开(公告)号：NO941435L

    公开(公告)日：1994-10-24

    申请号：NO941435

    申请日：1994-04-20

    Applicant: BAKER HUGHES INC

    Inventor： COLLEE PIERRE EMMANUEL ,  MALLOW WILLIAM A ,  RADFORD STEVEN R

    IPC: C09K8/60 ,  C09K8/92 ,  E21B25/08

    Abstract: The present invention provides a method for maintaining the mechanical integrity and for maximizing the chemical integrity of a core sample during transport from a subterranean formation to the surface. The method involves cutting and encapsulating a core sample with an encapsulating material that increases in viscosity or even solidifies, at temperatures slightly lower than those expected downhole, or relatively early in the transport process. A preferred encapsulating material contains at least one polyglycol or chemically modified polyglycol from the oxyalkylene polymer family. The specific formulation of the encapsulating material differs depending upon the expected downhole conditions. For example, the encapsulating material can include a thickener, a nucleating agent, and a water swellable material or another inert material that is capable of sealing the core sample against water. A preferred nucleating agent would serve both as a heat transfer agent and a crystallization trigger, and therefore would speed up the rate at which the encapsulating material would solidify or increase in viscosity, particularly downhole. The encapsulating material should either solidify or increase in viscosity enough to protect the mechanical integrity and maximize the chemical integrity of the core sample for analysis at the surface. The chemical integrity of the core sample can be further maximized by using the present invention in conjunction with a pressure core barrel.

    ANGLED SIDEWALL CORING ASSEMBLY AND METHOD OF OPERATION
    42.
    发明专利
    ANGLED SIDEWALL CORING ASSEMBLY AND METHOD OF OPERATION 未知

    公开(公告)号：CA2065141A1

    公开(公告)日：1992-11-21

    申请号：CA2065141

    申请日：1992-04-03

    Applicant: BAKER HUGHES INC

    Inventor： EATON NICK G ,  RADFORD STEVEN R

    IPC: E21B7/06 ,  E21B49/06

    Abstract: The present invention is a sidewall coring assembly and method for taking a core sample at an angle to an existing borehole. The assembly includes a core barrel run at the end of a drill string and having a whipstock suspended below it, the whipstock having a anchor packer at its lower end. The packer is hydraulically inflated through the core barrel and an hydraulic line extending from the bottom thereof, the core barrel is released from the whipstock and the hydraulic line, and lowered to core at the angle and azimuth dictated by the whipstock. After coring is completed, the core barrel is withdrawn from the well and subsequently the whipstock and packer are retrieved with a stinger run on the drill string.

    INNER TUBE STABILIZER FOR A COREBARREL
    43.
    发明专利
    INNER TUBE STABILIZER FOR A COREBARREL 未知

    公开(公告)号：CA2065142A1

    公开(公告)日：1992-10-05

    申请号：CA2065142

    申请日：1992-04-03

    Applicant: BAKER HUGHES INC

    Inventor： RADFORD STEVEN R

    IPC: E21B25/00 ,  F16C17/18 ,  E21B49/02

    Abstract: A stabilizer bearing assembly is described for maintaining separation between a substantially nonrotating inner tube assembly and a rotating core barrel within which the inner tube assembly is disposed. The bearing assembly comprises a cylindrical tube having a cylindrical sleeve segment concentrically slidably mounted on the tube over an external bearing portion thereof. The tube includes an upper and a lower segment, with the hardened bearing portion over which the sleeve sits being located near the lower end of the upper segments. A flange demarcs the upper edge of the bearing portion. The upper end of the lower tube segments is threadedly attached over the lower end of the upper segment. The sleeve segment is trapped between the flange and the edge of the upper end of the lower tube segment. The inner surface of the sleeve has a plurality of spaced longitudinal furrows and the outer surface of the sleeve has raised ridges corresponding to the furrows. The furrows provide a passage for drilling fluid and debris. The ridges have at their tops flattened bearing surfaces which define an outer circumference whose radius is greater than the radius of the outer circumference of the sleeve segment and the tube. The stabilizer assembly can be detachably inserted between adjacent upper and lower elements of a inner tube assembly. For use, one or more of such stabilizer assemblies would be inserted at spaced intervals in an inner tube assembly.

    44.
    发明专利
    未知

    公开(公告)号：NO921312D0

    公开(公告)日：1992-04-03

    申请号：NO921312

    申请日：1992-04-03

    Applicant: BAKER HUGHES INC

    Inventor： RADFORD STEVEN R ,  WISER HELMA S

    IPC: E21B25/14 ,  E21B

    Abstract: The application is directed to a shoe assembly with a core catcher for retaining a core of an unconsolidated rock or earth formation in a coring barrel. The shoe assembly includes a tube section adapted to fit removably within the core barrel near the coring bit. Two sets of hinged fingers are attached to the inner surface of the tube section on respective circumferential lines which are displaced from each other. The fingers are movable about the hinged ends between an open position in which the fingers do not significantly occlude the passageway, and a closed position in which the fingers do occlude the passageway. The fingers are biased toward the closed position by means of respective springs associated with each finger. When in the closed position, the two sets of fingers together occlude at least 90% of the cross-section of the passageway. The fingers are urged to the open position by the action of a core moving through the coring barrel away from the drilling end. When the motion of the core into the barrel stops and then reverses as the core barrel is withdrawn from the wellbore, the springs exert sufficient force to move the fingers into the core taken from an unconsolidated formation. Continued upward movement of the core barrel drives the fingers through the core material to the closed position. In the closed position, the core catcher holds the core in place in the core barrel during its removal from the drill hole.

    Actuation assemblies, hydraulically actuated tools for use in subterranean boreholes including actuation assemblies and related methods
    46.
    发明专利
    Actuation assemblies, hydraulically actuated tools for use in subterranean boreholes including actuation assemblies and related methods 未知

    公开(公告)号：NO20151260A1

    公开(公告)日：2015-09-25

    申请号：NO20151260

    申请日：2015-09-25

    Applicant: BAKER HUGHES INC

    Inventor： RADFORD STEVEN R

    IPC: E21B10/32 ,  E21B21/10 ,  E21B34/14

    Abstract: Actuation assemblies include a valve assembly comprising a valve sleeve configured to rotate to selectively enable fluid flow through at least one aperture in the valve sleeve and into at least one port of an outer sleeve and a ball retention feature configured to selectively retain a ball dropped through a fluid passageway of the valve assembly in order to rotate the valve sleeve. Downhole tools include actuation assemblies. Methods for actuating a downhole tool include receiving a ball in an actuation assembly, rotating a valve sleeve of the actuation assembly to enable fluid to flow through a portion of the actuation assembly, and actuating a portion of the downhole tool with the fluid.

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