Matches 1 - 50 out of 114 1 2 3 >
Match Document Document Title
7588100 Method and apparatus for directional drilling with variable drill string rotation  
Apparatus and methodology is provided for directional drilling which avoid the effects of static friction between the drill string and the borehole. The drill string is rotated continuously in one...
7543658 Directional drilling control  
Drilling means for directional drilling in a bore hole comprising a drill pipe and a drilling head, including a slippable clutch device linking the drill pipe and said drilling head such that...
7484573 Slip grip drilling tool  
A directional drilling apparatus for mounting a drill bit on a rotatable drill support comprises a member for transmitting rotation from the drill support to a drill bit, and a body mounted to the...
7481282 Flow operated orienter  
Some embodiments of the present invention generally provide an apparatus that may be used in a coiled tubing drillstring and that can switch between effectively straight drilling and curved...
7472763 Wear resistant tubular connection  
A wear resistant casing connection including a wear resistant portion on its exterior surface is taught. A casing connection having a controlled bend angle is also taught.
7445059 Drill string deflecting apparatus  
Manipulation of the rate of drilling fluid flow down a drill string containing the apparatus causes a drilling fluid powered linear motor, preferably a piston, to move an output shaft, hingedly...
7360609 Directional drilling apparatus  
A general housing encloses a drilling motor that can be disabled to permit optimum rotary drilling practice. A mode selector responds to manipulation of the drilling fluid flow rate and permits...
7311157 Tool for controlling rotation of a bottom hole assembly with respect to a drillstring  
A tool for controlling rotation of a bottom hole assembly with respect to a drillstring has a mandrell with a longitudinal groove and a circumferential groove extending therearound and in...
7237624 Electronic roll indexing compensation in a drilling system and method  
An assembly is configured for sensing its roll orientation, referenced to a roll indexing orientation that is defined by the assembly, so as to produce a roll output signal and for transmitting the...
7234544 Drill tool shaft-to-housing locking device  
In a tool having an inner member supported within an outer member, wherein the tool defines a longitudinal axis, a device is provided for preventing relative rotation of the inner member and the...
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...
7195083 Three dimensional steering system and method for steering bit to drill borehole  
A steering assembly includes upper and lower tubular housings connected by a universal joint. An angle cam is disposed on the end of the lower housing and projects into the upper housing. A...
7104345 Downhole rotatable-shaft connector assembly and method  
A connector assembly for connecting with a rotatable shaft is provided. The connector assembly includes a mating sleeve threadably coupleable about the shaft and a center sleeve sized and shaped...
6962214 Rotary seal for directional drilling tools  
A rotary valve assembly for a rotary steerable tool is disclosed for directing flow of an abrasive laden drilling fluid; the valve assembly has a first sealing surface rotatably engaging a second...
6942044 Three-dimensional steering tool for controlled downhole extended-reach directional drilling  
A steering tool for extended-reach directional drilling in three dimensions comprises a mud pulse telemetry section, a rotary section, and a flex section assembled as an integrated system in series...
6848518 Steerable underreaming bottom hole assembly and method  
A steerable bottom hole assembly may be used for drilling both a curved section and straight section of the borehole, with the bottom hole assembly including a reamer beneath the downhole motor 12...
6843332 Three dimensional steerable system and method for steering bit to drill borehole  
A steering assembly includes upper and lower tubular housings connected by a universal joint. An angle cam is disposed on the end of the lower housing and projects into the upper housing. A...
6837315 Rotary steerable drilling tool  
The invention refers to a rotary steerable drilling tool having a tool collar and a bit shaft. The bit shaft is supported within the tool collar for pivotal movement about a fixed position along...
6827159 Steerable horizontal subterranean drill bit having an offset drilling fluid seal  
Various steerable horizontal subterranean drill bit apparatuses, which may have a drill bit, a housing and a one-bolt attachment system, or other features.
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...
6761231 Rotary driven drilling hammer  
A percussive tool adapted to receive rotational energy from the inner member of a dual-member drill string. In a preferred embodiment the percussive tool has a hydraulic pump, driven by a drive...
6705415 Directional drilling apparatus  
In a directional drilling apparatus in which a sensor/transmitter or sonde is located in one section of a drill string and an element of an adjacent section is configured to “steer” the bore...
6659201 Method and apparatus for directional actuation  
A variable orientation downhole actuation tool is made up of a first part which is adapted to be fixed with respect to the end of a down hole tube, and a second part which is adjustable with...
6598687 Three dimensional steerable system  
A steering assembly includes upper and lower tubular housings connected by a universal joint. An angle cam is disposed on the end of the lower housing and projects into the upper housing. A...
6595303 Rotary steerable drilling tool  
The device provides a method for positioning the drill bit in a drilling operation to achieve small changes in hole angle or azimuth as drilling proceeds. Two different positions are available to...
6571888 Apparatus and method for directional drilling with coiled tubing  
An improved coiled tubing directional drilling method comprises: providing a bent housing which is rotatably coupled to the coiled tubing, rotating the drill bit, and rotating the bent housing....
6554083 Adjustable bent housing sub for a mud motor  
An adjustable bent housing adapter for downhole mud motor directional drilling operations including a cylindrical housing having a first and a second end defining a central bore there through, the...
6550818 Bent sub assembly for directional drilling  
An adjustable bent sub assembly is provided comprising a tubular adaptor for connection with the stator of a downhole motor, a tubular adjusting ring for altering the angular offset of the...
6550548 Rotary steering tool system for directional drilling  
A rotary steering apparatus including a drill string, a drill bit, a main body connected at one end to the drill string and at another end to the drill bit, a sleeve extending around the main body...
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...
6543553 Apparatus for use in drilling oil and gas production wells or water injection wells  
An apparatus and method for drilling two separate and independent wellbores through a single surface casing. According to one aspect of the invention, a drilling assembly guides a drill bit into...
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...
6464022 Mobile horizontal directional boring apparatus and method for use in boring from existing utility manholes  
A mobile, horizontal directional boring apparatus and method is provided for boring from an existing utility manhole for the placement of small diameter fiber optic cabling. A mobile platform is...
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...
6325162 Bit connector  
The drilling assembly includes an eccentric adjustable diameter blade stabilizer, having a housing with a fixed stabilizer blade and a pair of adjustable stabilizer blades, and a bi-center bit,...
6244345 Lockable swivel apparatus and method  
6082470 Directional drilling system and apparatus  
The apparatus, in one embodiment has guide housing with a shaft extending through the guide housing with a drill bit coupled to its forward end. The shaft may be moved to a forward drilling...
6073707 Downhole sub with kick pad for directional drilling  
A downhole drill system comprising a drill string, a drill bit terminating the drill string, a bent sub in the drill string above the drill bit, a motor housing in the drill string above the drill...
5957222 Directional drilling system  
The apparatus, in one embodiment has a front shaft support and a guide housing coupled together for longitudinal movement relative to each other. A shaft extends through the front shaft support and...
5941323 Steerable directional drilling tool  
A drilling tool for use with a drill string into which drilling fluid is pumped. The tool comprises: a non-rotating housing having stabilizer blades on its outer surface; a rotating mandrel,...
5899281 Adjustable bend connection and method for connecting a downhole motor to a bit  
An adjustable bend connection is provided which desirably extends from the power section of a downhole progressing-cavity-type mud motor. The joint is secured internally so that any reverse...
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...
5775444 Drill string orienting motor  
The housing of the orienting motor serves as a length of pipe string and rotates the lower end relative to the upper end. Rotation is in preselected increments each time the rate of fluid flow in...
5735357 Apparatus for and method of directional drilling  
A bottom hole assembly for use with coil tubing for drilling, comprising a mud motor having a housing that is bent at its lower end, an output shaft extending through the bent housing, a drill bit...
5673765 Downhole drilling subassembly and method for same  
A downhole drilling subassembly for use with a pressurized fluid carrying drill string extending from a well head and having a portion down a bore hole. A first tubular housing is provided which is...
5575343 Drilling a bore hole having a short radius curved section followed by a straight section  
A method is provided for drilling of a well bore portion including a short radius curved section followed by a straight section. A drilling tool is provided having a first portion on which the...
5538092 Flexible drill pipe  
A flexible drill pipe includes a plurality of hollow tubular pipe segments, having a longitudinal centerline, the segments being flexibly connected together, each connecting joint a type of joint...
5503235 Directional drilling control method  
A method for causing a drill string to progressively deflect at preselected length intervals in proportion to the rate of flow therethrough allowing the drill string to follow a resulting curved...
5495900 Drill string deflection sub  
A deflection control sub to be used with or as part of a down hole drilling motor, is a drill string element consisting of an upper and a lower portion connected by bearings for relative rotation...
5495901 Surface adjustable adjustable bent housing  
An adjustable bent housing for use in downhole drilling which includes a housing, mandrel, ring and locking mechanism. The housing has a housing central axis, a downward facing end face defining a...
Matches 1 - 50 out of 114 1 2 3 >