公开(公告)号：WO2015089515A3

公开(公告)日：2015-08-06

申请号：PCT/US2014072182

申请日：2014-12-23

Applicant: NAT OILWELL DHT LP

Inventor： GARNER MICHAEL ,  MARSHALL JAN EDGAR ,  SRESHTA HAROLD A

IPC: E21B10/42

CPC classification number: E21B10/43 ,  E21B10/42 ,  E21B10/54

Abstract: A fixed cutter drill bit for drilling a borehole in earthen formations includes a blank assembly and a matrix crown fixably mounted to the blank assembly. The blank assembly includes an annular mandrel and a plurality of elongate studs fixably coupled to the mandrel. The mandrel has a first end distal the crown and a second end engaging the crown. In addition, the mandrel includes a plurality of bores extending axially from the second end. Each elongate stud has a first end disposed within one of the bores and a second end disposed in the crown distal the mandrel.

Abstract translation: 用于在土制地层中钻出钻孔的固定切割器钻头包括坯件组件和可固定地安装到坯件组件的基质冠。 毛坯组件包括环形心轴和可固定地连接到心轴的多个细长螺柱。 心轴具有远离冠部的第一端部和接合冠部的第二端部。 另外，心轴包括多个从第二端轴向延伸的孔。 每个细长螺柱具有设置在孔中的一个中的第一端和设置在远离心轴的冠部中的第二端。

公开(公告)号：WO2013101925A3

公开(公告)日：2014-05-22

申请号：PCT/US2012071808

申请日：2012-12-27

Applicant: NAT OILWELL DHT LP ,  SILVA ROGER H

Inventor： SILVA ROGER H

IPC: E21B10/30 ,  E21B17/10

CPC classification number: E21B10/26 ,  E21B7/00 ,  E21B10/30 ,  E21B17/1078

Abstract: A tool for reaming a borehole includes a tubular body (101) having a central axis, an uphole reamer section (110) mounted to the body, and a downhole reamer section (130) mounted to the body. Each reamer section includes a first blade extending radially from the body. Each blade has an uphole end, a downhole end opposite the uphole end, and a formation-facing surface. The formation facing surface of the first blade of the uphole reamer section is disposed at a radius R1 that increases moving from the uphole end to the downhole end. The formation facing surface of the first blade of the downhole reamer section is disposed at a radius R1' that decreases moving from the uphole end to the downhole end. The tool also includes a cutter element mounted to the formation facing surface of the first blade of each reamer section.

Abstract translation: 用于铰孔钻孔的工具包括具有中心轴线的管状体（101），安装到主体上的钻孔扩孔器部分（110）和安装到主体上的井下铰刀部分（130）。 每个铰刀部分包括从主体径向延伸的第一叶片。 每个叶片具有井眼端，与井眼端相对的井下端和面向地层的表面。 钻孔铰刀部分的第一叶片的形成面的表面设置在半径R1处，该半径R1增加从井上端到井下端的移动。 井下铰刀部分的第一叶片的形成面向表面设置在半径R1'，该半径R1'减小从井上端到井下端的移动。 该工具还包括安装到每个铰刀部分的第一叶片的面向表面的切割器元件。

公开(公告)号：WO2013055753A4

公开(公告)日：2014-05-15

申请号：PCT/US2012059490

申请日：2012-10-10

Applicant: NAT OILWELL DHT LP ,  SRESHTA HAROLD A

Inventor： SRESHTA HAROLD A

IPC: C22C1/10 ,  B22F3/00 ,  B22F7/06 ,  C22C1/05

CPC classification number: B24D3/06 ,  B22F3/26 ,  B22F2005/001 ,  B24D18/0009 ,  B24D99/005 ,  C22C1/00 ,  C22C1/051 ,  C22C1/1036 ,  C22C29/08 ,  E21B10/43

Abstract: Composite materials for use with a drill bit for drilling a borehole in earthen formations. The composite material comprises a first pre-infiltrated hardphase constituent and a second preinfiltrated hardphase constituent. The second pre-infiltrated hardphase constituent is a carbide which comprises at least 0.5 weight % of a binder and at least about 1% porosity. The composite material further comprises an infiltrant.

Abstract translation: 复合材料与钻头一起用于在地层中钻孔。 复合材料包括第一预渗透硬相组分和第二预浸渗硬相组分。 第二预渗透硬相组分是包含至少0.5重量％的粘合剂和至少约1％孔隙率的碳化物。 复合材料还包括浸渗剂。

公开(公告)号：WO2007030262B1

公开(公告)日：2007-08-02

申请号：PCT/US2006031376

申请日：2006-08-11

Applicant: NAT OILWELL DHT LP ,  STREATER JAMES R JR ,  BOSLEY GREGG A ,  ROSS DAVID P ,  ISAACKS STEVEN C

Inventor： STREATER JAMES R JR ,  BOSLEY GREGG A ,  ROSS DAVID P ,  ISAACKS STEVEN C

IPC: E21B31/00

CPC classification number: E21B31/18

Abstract: Disclosed is an improved spear head overshot. The spear head overshot is particularly useful as part of a cable-guided fishing assembly. The spear head overshot essentially comprises one or more pivot lugs, the pivot lugs comprising jaw sections and release point sections, an actuator slide, a wave spring, a pivot mandrel, a screw attached to the pivot mandrel, and a compression spring threaded over the screw. In operation, a spear head is inserted into the spear head overshot until the spear head passes the jaw sections of the pivot lugs, at which time the spear head is locked into place. To release the spear head, the release point sections of the pivot lugs are manually forced inward. Simultaneously, the jaw sections of the pivot lugs are forced outward, thereby allowing the spear head to be removed from the spear head overshot. In a cable-guided fishing operation, this process can be repeated as often as necessary.

公开(公告)号：WO2006058244A3

公开(公告)日：2007-02-22

申请号：PCT/US2005042796

申请日：2005-11-28

Applicant: NAT OILWELL DHT LP ,  ISAACKS STEVEN C ,  HIEBELER HARRY P ,  CORDOVA NOE TONY ,  LIVINGSTON JIMMY ,  GILLEYLEN RUSSELL C

Inventor： ISAACKS STEVEN C ,  HIEBELER HARRY P ,  CORDOVA NOE TONY ,  LIVINGSTON JIMMY ,  GILLEYLEN RUSSELL C

IPC: E21B33/06 ,  E21B29/08

CPC classification number: E21B33/063

Abstract: An improved shear/seal ram assembly used in ram-type BOPs is disclosed. The disclosed invention is a unique shear/seal ram assembly in which rail seal actuators attached to or integrally formed in a planar surface of one shear blade mate with and slide within corresponding rail guide grooves formed in a planar surface of a second shear blade. As the shear blades move over each other, the rail seal actuators slide within the rail guide grooves, eventually coming into contact with a seal actuator plate of a unique blade-to-blade seal assembly placed within a shear blade seal groove. Continued movement of the shear blades over each other causes the rail seal actuators to compress, or "energize," the blade-to-blade seal of the blade-to-blade seal assembly, thereby providing a pressure tight seal between the shear blade assemblies.

Abstract translation: 公开了一种用于冲压式BOP的改进的剪切/密封压头组件。 所公开的发明是一种独特的剪切/密封柱塞组件，其中附接到或整体地形成在一个剪切刀片的平坦表面中的轨道密封件致动器与形成在第二剪切刀片的平坦表面中的相应导轨槽相配合并滑动。 当剪切刀片彼此移动时，轨道密封件致动器在轨道引导槽内滑动，最终与设置在剪切刀片密封槽内的独特的叶片到叶片密封组件的密封致动器板接触。 剪切刀片彼此继续运动导致轨道密封件致动器压缩或“激励”刀片到刀片密封组件的刀片到刀片的密封，从而在剪切刀片组件之间提供压力密封 。

公开(公告)号：WO2006119008A2

公开(公告)日：2006-11-09

申请号：PCT/US2006016207

申请日：2006-04-27

Applicant: NAT OILWELL DHT LP ,  EL-RAYES KOSAY ,  MELHEM NAZEEH ,  SHWETS PETER

Inventor： EL-RAYES KOSAY ,  MELHEM NAZEEH ,  SHWETS PETER

IPC: E21B4/00

CPC classification number: F04C14/26 ,  E21B4/02 ,  F03C2/08 ,  F04C14/08 ,  Y10S415/903 ,  Y10T137/2663 ,  Y10T137/2693 ,  Y10T137/4658

Abstract: A method and apparatus for changing the speed of a drill bit down hole in a fluid- actuated motor, including a positive displacement motor and a hydraulic motor, is disclosed. The apparatus comprises a bypass valve installed in the motor for controlling flow through and around the power section of the motor. When closed, the bypass valve forces all fluid to flow through the power section of the motor, imparting maximum speed to the drill bit. When opened, a portion of the fluid flow is allowed to flow around the power section of the motor, thereby reducing the speed of the drill bit. The bypass valve may be opened or closed mechanically, electrically, hydraulically, pneumatically, or by any other means, including a removable plug.

Abstract translation: 公开了一种用于改变流体致动马达（包括容积式马达和液压马达）中的钻头向下孔的速度的方法和装置。 该装置包括安装在电动机中的旁通阀，用于控制通过电动机的动力部分的流动。 当关闭时，旁通阀迫使所有流体流过电动机的动力部分，赋予钻头最大的速度。 当打开时，流体流的一部分被允许围绕马达的动力部分流动，从而降低钻头的速度。 旁通阀可以机械地，电动地，液压地，气动地或通过任何其他方式（包括可移除的塞子）打开或关闭。

公开(公告)号：WO2016025570A3

公开(公告)日：2016-04-14

申请号：PCT/US2015044804

申请日：2015-08-12

Applicant: NAT OILWELL DHT LP

Inventor： MOSLEMI ALI AKBAR ,  SUE JIINJEN ALBERT

IPC: E21B10/18

CPC classification number: E21B10/602 ,  E21B10/42 ,  E21B10/61 ,  E21B2010/607

Abstract: A drill bit comprises a bit body having a body face. A plurality of fixed blades extends from the bit body. Each of the plurality of fixed blades has a leading face and a trailing face. A plurality of nozzles is disposed on the body face to flow drilling fluid out of the bit body. A plurality of flow guides direct a portion of the drilling fluid away from the bit body. Each of the plurality of flow guides extends longitudinally from the body face, and along the leading face of one of the plurality of fixed blades.

Abstract translation: 钻头包括具有身体表面的钻头体。 多个固定刀片从钻头体延伸出来。 多个固定刀片中的每一个具有前面和后面。 多个喷嘴设置在身体表面上，以将钻井液体从钻头体中流出。 多个流动引导件将钻井液的一部分引导离开钻头体。 所述多个流动引导件中的每一个从所述主体表面沿着所述多个固定刀片中的一个的前表面纵向延伸。

公开(公告)号：WO2013055753A3

公开(公告)日：2014-03-13

申请号：PCT/US2012059490

申请日：2012-10-10

Applicant: NAT OILWELL DHT LP ,  SRESHTA HAROLD A

Inventor： SRESHTA HAROLD A

IPC: C22C1/10 ,  B22F3/00 ,  B22F7/06 ,  C22C1/05

CPC classification number: B24D3/06 ,  B22F3/26 ,  B22F2005/001 ,  B24D18/0009 ,  B24D99/005 ,  C22C1/00 ,  C22C1/051 ,  C22C1/1036 ,  C22C29/08 ,  E21B10/43

Abstract: Composite materials for use with a drill bit for drilling a borehole in earthen formations. The composite material comprises a first pre-infiltrated hardphase constituent and a second preinfiltrated hardphase constituent. The second pre-infiltrated hardphase constituent is a carbide which comprises at least 0.5 weight % of a binder and at least about 1% porosity. The composite material further comprises an infiltrant.

Abstract translation: 与钻头一起使用的用于在土制地层中钻出钻孔的复合材料。 该复合材料包含第一预渗透硬相组分和第二预渗透硬相组分。 第二预渗透硬相组分是包含至少0.5重量％的粘结剂和至少约1％的孔隙率的碳化物。 该复合材料还包含浸渗剂。

公开(公告)号：WO2015161010A3

公开(公告)日：2016-01-21

申请号：PCT/US2015026061

申请日：2015-04-16

Applicant: NAT OILWELL DHT LP

Inventor： REZA RAHMANI

IPC: E21B10/567

CPC classification number: E21B10/5673

Abstract: A cutting element (101, 501, 601, 701) for a drill bit (112) is advanceable into a subterranean formation (106) to form a wellbore (104). The cutting element includes an element body having a face (328, 528, 628, 728) at an end thereof, and a ridge (332). The face has a ramp (334, 534, 634, 734) and a pair of side regions (330a, b) thereon. The ramp has a curved edge (335) along a periphery of the face and two sides (337a, b). Each of the two sides extends from opposite ends of the curved edge and converges at a location (C) along the face. The face has a chamfer (336) along a peripheral edge thereof. The ridge is between the chamfer and the location. Each of the pair of side regions is positioned on opposite sides of the ridge and extends between the periphery, the ridge, and one of the two sides of the ramp whereby the chamfer engages a wall of the wellbore and extrudate is drawn along the pair of side regions.

Abstract translation: 用于钻头（112）的切割元件（101,501,601,701）可推进到地层（106）中以形成井筒（104）。 切割元件包括在其端部具有面（328,528,628,728）的元件主体和脊（332）。 面上有一个坡道（334,534,634,734）和一对侧面区域（330a，b）。 斜面沿着面的周边和两侧（337a，b）具有弯曲的边缘（335）。 两侧中的每一个从弯曲边缘的相对端延伸并沿着面朝着一个位置（C）会聚。 面具有沿着其外围边缘的倒角（336）。 脊在倒角和位置之间。 所述一对侧区域中的每一个位于所述脊的相对侧上，并且在所述周边，所述脊与所述斜面的两侧之一之间延伸，由此所述倒角与所述井筒的壁接合，并且所述挤出物沿着所述一对 边区域。

公开(公告)号：WO2014089457A3

公开(公告)日：2015-05-14

申请号：PCT/US2013073619

申请日：2013-12-06

Applicant: NAT OILWELL DHT LP ,  TULLOCH RORY MCCRAE ,  EDDISON ALAN MARTYN ,  MACFARLANE ALASTAIR HENRY WALTER

Inventor： TULLOCH RORY MCCRAE ,  EDDISON ALAN MARTYN ,  MACFARLANE ALASTAIR HENRY WALTER

IPC: E21B4/10

CPC classification number: E21B4/14 ,  C08L9/02 ,  C09J183/04 ,  E21B1/02 ,  E21B4/003 ,  E21B4/10 ,  E21B4/20

Abstract: A drilling assembly assembly includes a hammer motor, a shaft, a driver, and a hammer (218). The shaft is operatively connectable to the hammer motor and rotated thereby. The driver is operatively connectable to the shaft, and includes a cam (such as guide channel 232) rotatable with the shaft and a fixed guide (such as guide pins 230) having a guide surface thereon. The cam is engageable with the guide surface and axially movable thereabout during rotation thereof. The hammer is operatively connectable to the driver and axially movable therewith, axially movable within the housing (215) independently from axial movement of the housing, and engageable with the bit to impart an impact thereto whereby the bit is hammered.

Abstract translation: 钻井组件组件包括锤马达，轴，驱动器和锤（218）。 轴可操作地连接到锤马达并由此旋转。 驱动器可操作地连接到轴，并且包括可与轴一起旋转的凸轮（例如导向通道232）和在其上具有引导表面的固定引导件（例如引导销230）。 凸轮可与引导表面接合并且在其旋转期间可在其周围轴向移动。 锤子可操作地连接到驱动器并且可轴向移动，可独立于壳体的轴向移动而在壳体（215）内轴向移动，并且可与钻头接合以对其施加冲击，由此钻锤。