Earth-boring tools including selectively actuatable cutting elements and related methods

    公开(公告)号:US10066444B2

    公开(公告)日:2018-09-04

    申请号:US14957186

    申请日:2015-12-02

    Abstract: Method of operating earth-boring tools may involve activating a selectively activatable hydraulic fracturing device secured to the earth-boring tool to impact an underlying earth formation with a fluid from the selectively activatable hydraulic fracturing device. A crack may be at least one of initiated or propagated in a portion of the underlying earth formation utilizing the fluid in response to activation of the selectively activatable hydraulic fracturing device. The selectively activatable hydraulic fracturing device may be subsequently deactivated. Earth-boring tools may include a selectively activatable hydraulic fracturing device configured to transition between an activated state in which fluid is permitted to flow through the selectively activatable hydraulic fracturing device to engage with an underlying earth formation and a deactivated state in which fluid does not flow through the selectively activatable hydraulic fracturing device. The selectively activatable hydraulic fracturing device may be configured to at least one of initiate or propagate cracks.

    EARTH-BORING TOOLS CARRYING FORMATION-ENGAGING STRUCTURES

    公开(公告)号:US20170130534A1

    公开(公告)日:2017-05-11

    申请号:US14933908

    申请日:2015-11-05

    CPC classification number: E21B10/633 E21B10/55

    Abstract: An earth-boring tool includes a blade located on a body of the earth-boring tool with a pocket formed in an exposed outer surface of the blade. A formation-engaging structure is affixed within the pocket. The formation-engaging structure includes a distal end, a proximal end and a tapered sidewall therebetween. The distal end of the formation-engaging structure includes a formation-engaging surface. The tapered sidewall engages a tapered inner surface of the pocket. The tapered sidewall of the formation-engaging structure and the tapered inner surface of the pocket are each sized and configured to provide an interference fit between the formation-engaging structure and the pocket of the blade. In additional embodiments, instead of retention by interference fit, the formation-engaging structure is retained to the blade by a threaded fastener threaded within a tapped bore extending through the blade. The threaded fastener is received within a receiving formation of the formation-engaging structure.

    EARTH-BORING TOOLS INCLUDING BEARING ELEMENT ASSEMBLIES, AND RELATED METHODS
    3.
    发明申请
    EARTH-BORING TOOLS INCLUDING BEARING ELEMENT ASSEMBLIES, AND RELATED METHODS 审中-公开
    包括轴承元件组件在内的接地工具及相关方法

    公开(公告)号:US20150330153A1

    公开(公告)日:2015-11-19

    申请号:US14276587

    申请日:2014-05-13

    CPC classification number: E21B10/42 E21B10/55 E21B10/633 Y10T29/49732

    Abstract: An earth-boring tool includes a body comprising a pocket in a leading end thereof for accepting at least a portion of a bearing element assembly. A bearing element assembly may be disposed within the pocket, and the bearing element assembly may include a retaining element at least partially disposed in a groove in a sidewall of the pocket and a bearing element. The bearing element may include a distal end having a bearing surface, a proximal end, and a side surface between the distal end and the proximal end, the side surface comprising a feature configured to abut the retaining element, wherein mechanical interference between the feature and the retaining element axially retains the bearing element within the pocket. Methods include disengaging a mechanical retention device retaining a bearing element within a pocket in a body of the earth-boring tool, and removing the bearing element from the pocket.

    Abstract translation: 一种钻孔工具包括主体,该主体包括在其前端中的凹口,用于接收轴承元件组件的至少一部分。 轴承元件组件可以设置在凹穴内,并且轴承元件组件可以包括至少部分地设置在凹槽的侧壁中的凹槽中的保持元件和轴承元件。 轴承元件可以包括具有支承表面,近端和在远端和近端之间的侧表面的远端,所述侧表面包括构造成邻接保持元件的特征,其中特征和 保持元件将轴承元件轴向保持在口袋内。 方法包括将保持轴承元件的机械保持装置脱离在钻孔工具的主体内的凹槽内,以及从口袋中移除轴承元件。

    Mechanical locking mechanism using shape memory materials

    公开(公告)号:US10569370B2

    公开(公告)日:2020-02-25

    申请号:US15434206

    申请日:2017-02-16

    Abstract: A fastening apparatus includes a retaining member comprising a shape memory material configured to transform, responsive to application of a stimulus, from a first solid phase to a second solid phase. The retaining member is disposed within a hole in a body and secured within the hole by phase change which creates an interference fit to secure the retaining member against rotational and axial movement. The hole has a second axial cross-sectional shape. The retaining member has a first axial cross-sectional shape that is preferably either circular or rectangular.

    EARTH-BORING TOOL HAVING BACK UP CUTTING ELEMENTS WITH FLAT SURFACES FORMED THEREIN AND RELATED METHODS

    公开(公告)号:US20170081921A1

    公开(公告)日:2017-03-23

    申请号:US14938613

    申请日:2015-11-11

    CPC classification number: E21B10/43 E21B10/14 E21B10/42 E21B10/36

    Abstract: An earth-boring tool includes primary and secondary cutting elements mounted to a tool body. The secondary cutting elements define a secondary cutting profile. The secondary cutting profile is recessed relative to the primary cutting profile, which is defined by the primary cutting elements. In an unworn condition, the primary cutting elements engage and cut a formation material while the secondary cutting elements do not. Each secondary cutting element includes a flat surface oriented at an angle relative to a longitudinal axis thereof and extending between a front cutting face and a peripheral side surface thereof. The secondary cutting elements are oriented on the tool body such that a surface area of the flat surface thereof will engage the formation material at least substantially simultaneously when the primary cutting elements reach a worn condition. Methods of forming the earth-boring tool and methods of using the earth-boring tool are also disclosed.

    CUTTING ELEMENT RETENTION FOR HIGH EXPOSURE CUTTING ELEMENTS ON EARTH-BORING TOOLS

    公开(公告)号:US20160194920A1

    公开(公告)日:2016-07-07

    申请号:US15068186

    申请日:2016-03-11

    Abstract: Earth-boring tools include a cutting element mounted to a body that comprises a metal or metal alloy, such as steel. A cutting element support member is mounted to the body rotationally behind the cutting element. The cutting element support member has an at least substantially planar support surface at a first end thereof, and a lateral side surface extending from the support surface to an opposing second end of the cutting element support member. The cutting element has a volume of superabrasive material on a first end of a substrate, and a lateral side surface extending from the first end of the substrate to an at least substantially planar back surface. The at least substantially planar back surface of the cylindrical substrate abuts an at least substantially planar support surface of the cutting element support member.

    EARTH-BORING TOOLS UTILIZING SELECTIVE PLACEMENT OF POLISHED AND NON-POLISHED CUTTING ELEMENTS, AND RELATED METHODS

    公开(公告)号:US20180216410A1

    公开(公告)日:2018-08-02

    申请号:US15417499

    申请日:2017-01-27

    Inventor: Kenneth R. Evans

    CPC classification number: E21B10/54 E21B3/00 E21B10/42 E21B10/55 E21B10/62

    Abstract: An earth-boring tool includes a body having a longitudinal axis. The earth-boring tool also includes blades extending longitudinally and generally radially from the body. The earth-boring tool may also include one or more polished superabrasive cutting elements located on at least one blade in at least one region of a face of the earth-boring tool, and one or more non-polished superabrasive cutting elements located on the at least one blade in at least another region of the face of the earth-boring tool. Methods include drilling a subterranean formation including engaging a formation with one or more polished superabrasive cutting elements and one or more non-polished superabrasive cutting elements of the earth-boring tool secured at selected locations of one or more regions of blades extending from a body of the earth-boring tool.

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