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...Daniel Webster invented a "bull plow" to pull out tree stumps. It didn't catch on because it was huge and required four oxen to pull it!
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| Number | Title | Issue Date |
| 7347283 | Using a rotating inner member to drive a tool in a hollow outer member A rotating inner member is used to drive a downhole tool housed within the hollow outer member of a dual-member drill string. The downhole tool preferably will be adapted to receive rotational energy from the inner member. In a preferred embodiment, the downhole too... | 03/25/2008 |
| 7287606 | Drilling method for enlarging a borehole using a kick sub A drill string is fitted at the lower end with a drill string deflecting apparatus and a drill bit. The drill string deflecting apparatus is activated to deflect the drill bit from the general center line of the drill string. Drilling proceeds to enlarge a length of... | 10/30/2007 |
| 7216726 | Downhole fluid-tight flexible joint A downhole tool comprises a joint, and a resilient member 65 which extends through the joint and provides a restoring force which tends to strengthen the joint. The joint may comprise a flex coupling 61 which allows limited articulation of the joint. F... | 05/15/2007 |
| 7198101 | Downhole release joint A downhole apparatus permitting separation of one part of downhole equipment from another part thereof includes a first part connected to a second part by a connecting member which limits axial and rotational movement of the first and second parts and has first and ... | 04/03/2007 |
| 7025152 | Using a rotating inner member to drive a tool in a hollow outer member A rotating inner member is used to drive a downhole tool housed within the hollow outer member of a dual-member drill string. The downhole tool preferably will be adapted to receive rotational energy from the inner member. In a preferred embodiment, the downhole too... | 04/11/2006 |
| 6799646 | Adjustable deflecting sub As a serial element of a drill string, the drill string is adjustably bent by rotating one end of the sub relative to the other end. The opposite ends rotate about a tilted center line such that in one rotational position the sub is straight. One half turn of one en... | 10/05/2004 |
| 6739413 | Using a rotating inner member to drive a tool in a hollow outer member A rotating inner member is used to drive a downhole tool housed within the hollow outer member of a dual-member drill string. The downhole tool preferably will be adapted to receive rotational energy from the inner member. In a preferred embodiment, the downhole too... | 05/25/2004 |
| 6640911 | Device for connecting a tool to a drive A device for connecting a tool to a mechanical drive contains as the coupling element a spring washer coupling or clutch, which is made in one piece from metal and at least in the rotation direction has a limited resilience. Use is made thereof for preven... | 11/04/2003 |
| 6543554 | Adjustable housing for a mud motor There is provided an adjustable housing for use with a drill string for controlled directional drilling of a well hole. The housing includes an upper sub and a lower sub each having a first portion extending along a primary axis and a second portion exten... | 04/08/2003 |
| 6516901 | Adjustable orienting sub Opposite ends, or terminals, of the sub are connected by a tubular arbor with threaded pins on each end. The arbor is bent in the middle. A mating threaded box on the upper terminal is tilted an amount equal to the bend angle of the arbor and mates with t... | 02/11/2003 |
| 6494273 | Elevator for supporting an elongate member such as a drill pipe The present invention relates to an elevator (10, 134, 136, 150, 162, 186), particularly a single joint elevator, for supporting tubular members such as drill pipe (118), borehole casing and/or production tubing, for use in downhole operations. In a prefe... | 12/17/2002 |
| 6460633 | Side tracking bit In the invention a side tracking bit that has a flexible interface between the bit crown and the bit shank which greatly reduces the length of inflexible structure between the face of the bit and the flexible interface. The limiting of the length of infle... | 10/08/2002 |
| 6364034 | Directional drilling apparatus The apparatus has a housing which is secured to the lower end of a drilling motor body and carries an arbor that is secured to the output shaft of the motor. The arbor has three segments serially connected by gimbals. The upper segment is axially fixed by... | 04/02/2002 |
| 5875859 | Device for controlling the drilling direction of drill bit A device for controlling the drilling direction of drills includes a cylinder-type housing 6, a first ring-formed component 11 which is located on an inner peripheral surface that is eccentric with respect to the cylinder-type housing 6, a second ring-for... | 03/02/1999 |
| 5669457 | Drill string orienting tool A drill string orienting tool for insertion into a well bore includes a housing that has a plurality of inwardly projecting splines. A mandrel is disposed within the housing. The orienting tool has two operating positions, a running position, and an orien... | 09/23/1997 |
| 5368111 | Directional drilling sub with improved multi-slot locking arrangement A directional drilling apparatus includes a two part tubular body including an upper section and a lower section adapted to rotate with respect to one another, the upper section including threads for attaching the apparatus to a drill string, the upper se... | 11/29/1994 |
| 5314032 | Movable joint bent sub A movable joint bent sub for attachment to a well conduit for use in deviated drilling of a well. An elongated housing is provided having one end for attachment to a well conduit, a mandrel is telescopically movable in the bore of the housing, and a movab... | 05/24/1994 |
| 5273123 | Fitting for controlled trajectory drilling, comprising a variable angle elbow element and use of this fitting A fitting for controlled trajectory drilling. This fitting comprises a downhole motor, a drilling tool, at least one stabilizer and a remote controlled variable angle elbow element.... | 12/28/1993 |
| 5168943 | Adjustable bent sub The sub, usable as a length element of a drill string which may include a drilling motor body, comprises three generally tubular members. Two members, each having means to attach to a continuing drill string, have threaded boxes positioned in opposition. ... | 12/08/1992 |
| 5101914 | Orientatable adjustable bent housing An orientatable adjustable bent housing consisting of a tubular inner housing which is telescopically received within a tubular outer housing. A sleeve is provided which has an angular offset end face. The sleeve is axially slidable along the inner housin... | 04/07/1992 |
| 5050692 | Method for directional drilling of subterranean wells A method for directional drilling of a well with a motor and drill bit. A tubular housing is secured to the lower end of the motor with the housing having a first surface with an axis angularly disposed relative to the axis of the tubular housing. A secon... | 09/24/1991 |
| 5048621 | Adjustable bent housing for controlled directional drilling An adjustable bent housing for controlled directional drilling of well holes. The bend angle of the housing can be conveniently adjusted upon release of the locking nut which is threadably mounted to the motor casing. The locking nut engages an adjusting ... | 09/17/1991 |
| 5029654 | Bendable drilling sub A bendable sub for use in the drilling string includes an elongated tubular mandrel with a threaded top end for mounting the mandrel at the bottom end of a drilling string, a lock nut threaded onto the body of the mandrel between the ends thereof for vert... | 07/09/1991 |
| 4895214 | Directional drilling tool An improved directional drilling tool permits changing the downhole drilling assembly between straight and directional drilling configuration by manipulation of conventional drilling fluid flow controls at the surface. A housing, with stabilizer features,... | 01/23/1990 |
| 4836301 | Method and apparatus for directional drilling A method of directionally drilling a borehole makes use of a drilling assembly including an apparatus having an upper section with a longitudinal axis I, and a lower section having a central axis II and including at least part of a rotary drill bit, said ... | 06/06/1989 |
| 4836303 | Device for the remote adjustment of the relative orientation of two sections of a column The device comprises a variable-angle elbow coupling (14) interposed between the ends (12, 13) of two successive sections of a column. The coupling (14) comprises a first rectilinear tubular element (14a) and a second rectilinear tubular element (14b) con... | 06/06/1989 |
| 4834196 | Well drilling tool A drilling tool having a body that functions as a length of drill string and telescopes to shorten the body each time column load is applied by way of applied bit load. The telescoping action causes a cam turret in the body to change position to cause one... | 05/30/1989 |
| 4817740 | Apparatus for directional drilling of subterranean wells Apparatus for effecting a change in the direction of a downhole rotary drilling tool comprises a bent housing disposed between the bottom end of a downhole motor and a tubular housing connected to the drilling tool. The bent housing is angularly adjustabl... | 04/04/1989 |
| 4811798 | Drilling motor deviation tool A body and driveshaft extension for down hole drilling motors to allow the down hole assembly to operate as part of a drill string responsive to selected manipulations of the drilling fluid flow rate, carried out at the earth surface, to assume either a s... | 03/14/1989 |
| 4789032 | Orienting and circulating sub An orienting and circulating sub is disclosed for connection in an apparatus for angular drilling in the earth. The drilling apparatus comprises a drill string extending into a substantially vertical well bore in the earth supporting a fluid operated moto... | 12/06/1988 |
| 4732223 | Controllable downhole directional drilling tool A directional drilling tool permits the control of the angle of drilling of a drill bit through the repeated placement or removal of a ball within the mudstream. The ball activates a clutch mechanism within the directional drilling tool. The clutch mechan... | 03/22/1988 |
| 4694914 | Drilling string for drilling a bent bore, a method of using said string, and a bending device used in said string The present invention relates to drilling a well with a bent bore. A bending device is inserted in a drilling string between a stabilizer and an active motor element. If the drilling string is rotated in one direction the bending device takes up a rectili... | 09/22/1987 |
| 4641717 | Connector housing A connector housing for connecting a motor housing to a bearing housing, so that the angle between the longitudinal axis of the motor housing and the longitudinal axis of the bearing housing can be changed. The connector housing has a top housing, a cente... | 02/10/1987 |
| 4597454 | Controllable downhole directional drilling tool and method An improved directional drilling tool permits the control of the angle of drilling of a drill bit through the repeated placement or removal of a ball within the mudstream. The ball activates, clutch mechanism within the directional drilling tool. The clut... | 07/01/1986 |
| 4303135 | Directional drilling sub A variable angle directional drilling "sub" provides a shifting end portion which allows the sub to be rotated from a first, in-line, axially straight orientation with the drill string to a selected second, angled or "bent" position, which second position... | 12/01/1981 |
| 4299295 | Process for degasification of subterranean mineral deposits A process for drilling spaced horizontal boreholes in a coal or other mineral deposit in excess of 1500 feet in length in a pattern determined to maximize gas removal. Directional guidance is provided by a continuous downhole survey tool connected to data... | 11/10/1981 |
| 4077657 | Adjustable bent sub This invention relates to a device for selectively setting the axial alignment of sections of pipe from axial coincidence to an obtuse angle between the pipe sections.... | 03/07/1978 |
