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| Number | Title | Issue Date |
| 4553611 | Pressure drop regulator for downhole turbine In a borehole forming operation, the flow of gas through a downhole pneumatic motor is regulated to eliminate horsepower variations due to variations in bottom hole pressure. The pneumatic motor is connected to the lower end of a tubing string and an orif... | 11/19/1985 |
| 4548283 | Rotating shaft seal and bearing lubricating apparatus In accordance with an illustrative embodiment of the present invention, a seal or bearing lubricating system adapted for use in a downhole tool such as a drilling motor includes chamber means packed with grease for lubricating said seal and/or bearing, an... | 10/22/1985 |
| 4546836 | Downhole motor fluid flow restrictor A downhole drilling motor located near the end of a rotary drill string is powered by the drilling fluid for driving a rotary drill bit for the drilling of an oil or gas well or the like. Substantially all of the drilling fluid that exits the power produc... | 10/15/1985 |
| 4545241 | In-hole motor tachometer My invention relates to tachometers for in-hole motors, such as fluid turbine motors used in drilling of bore holes in the earth.... | 10/08/1985 |
| 4534427 | Abrasive containing fluid jet drilling apparatus and process An abrasive-fluid jet apparatus and process for drilling holes in rock having a rotary drill bit with multiple abrasive-fluid jet nozzles in the face of the bit and a stationary drill head housing torque generation apparatus and a rotary mounting holding ... | 08/13/1985 |
| 4529046 | Device for producing boreholes in coal or the like Apparatus for drilling geological formations includes a hydraulic motor through which a high pressure fluid is delivered to plural nozzles which define material cutting jets. A portion of the fluid supplied to the motor is diverted and employed to generat... | 07/16/1985 |
| 4527637 | Cycloidal drill bit Sonic energy in a cycloidal or quadrature wave action pattern is generated in a drill stem by means of a sonic oscillator employing an eccentrically weighted rotor. The sonic energy is transmitted down the drill stem to the drill bit to cause precession o... | 07/09/1985 |
| 4522272 | Apparatus for directional drilling of subterranean wells An apparatus is provided for effecting a change in direction of a rotary drill bit relative to a work string. Two tubular components incorporated into the work string have a rotationally adjustable connection for angularly displacing the drill bit axis re... | 06/11/1985 |
| 4518049 | Bottom hole motor for driving rock-breaking tool A bottom hole motor for driving a rock-breaking tool comprises a motor unit kinematically coupled with a spindle unit. The spindle unit has a housing inside which extends a shaft connected with the rock-breaking tool and mounted in the housing with the ai... | 05/21/1985 |
| 4501521 | Locking fastener assembly A locking fastener assembly has a fastener with a generally cylindrical body with external threads for assembly with a hollow outer member. Crenellations are provided at a first end of the body for engaging an inner member in the hollow member for prevent... | 02/26/1985 |
| 4493381 | Turbodrill with a reduced drilling fluid pressure on a floating piston A turbodrill of the type having an annular floating piston between a tubular housing and a bit drive shaft for bounding the top of a lubricant chamber and the bottom of a drilling fluid chamber. The lubricant chamber contains oil for lubricating a bearing... | 01/15/1985 |
| 4492276 | Down-hole drilling motor and method for directional drilling of boreholes A down-hole drilling motor is provided with a bearing unit which supports the output shaft in such an inclined position relative to the motor housing, that the central axis of the output shaft intersects the longitudinal axis of the motor housing at a poi... | 01/08/1985 |
| 4485879 | Downhole motor and method for directional drilling of boreholes The invention relates to a downhole motor having a housing of which the resistance against bending in a predetermined longitudinal plane is smaller than in any other longitudinal plane. Directional drilling of boreholes is carried out by rotating the dril... | 12/04/1984 |
| 4485880 | Direct drive for deep-well drilling A direct drive for deep-well drill bits on the Moineau displacement principle is provided with locking means detents (10, 11) which are disposed downstream of the working chambers (4) of rotor (3) and stator (2). Actuation of the locking means is effected... | 12/04/1984 |
| 4476944 | Method of providing a fluid seal in downhole drilling apparatus A method of drilling a subterranean well utilizing a downhole drilling apparatus is disclosed. The apparatus has a driven rotary drive shaft and a relatively fixed tubular housing circumjacent the drive shaft, with the housing having an annular upwardly f... | 10/16/1984 |
| 4475605 | Turbodrill A turbodrill comprising turbine sections, a spindle and a pipe assembly. According to the invention, the pipe assembly is formed by two coaxially arranged pipes provided between the spindle and the adjacent turbine section and coupled to components of the... | 10/09/1984 |
| 4462469 | Fluid motor and telemetry system A motor for driving a rotary drilling bit within a well through which mud is circulated during a drilling operation, with the motor being driven by a secondary fluid which is isolated from the circulating mud but derives energy therefrom to power the moto... | 07/31/1984 |
| 4462472 | Marine bearing for a downhole drilling apparatus A bearing supports a rotatable shaft in a fluid environment. The bearing can be utilized to support a drive shaft connected to a drill bit in a downhole drilling apparatus. The drive shaft extends through a housing in which drilling fluid is flowing. Pref... | 07/31/1984 |
| 4453604 | Turbodrills The turbodrill disclosed consists of a shell (1) attached to the drilling string and provided with an opening (3) in the side surface, a multistage turbine and a hollow shaft (6) supported in the shell (1) by radial bearings (10) and a thrust bearing (11)... | 06/12/1984 |
| 4452322 | Drilling device for drilling a core in deep drill holes In a core drilling apparatus wherein a core bit is driven by a hydraulically actuated Moineau type motor, control valve means are provided whereby drilling fluid can be directed through the core sleeve to remove debris from its interior, and, subsequently... | 06/05/1984 |
| 4449953 | Articulated coupling An articulated coupling has two cylindrical half-couplings facing each other at their end faces. Recesses are formed in the end faces which recesses in which a cage is installed in the recesses with a clearance. Radial coaxial openings are formed in the c... | 05/22/1984 |
| 4440242 | Device for producing boreholes in coal or the like Apparatus for drilling geological formations includes a hydraulic motor through which a high pressure fluid is delivered to plural nozzles which define material cutting jets. A portion of the fluid supplied to the motor is diverted and employed to generat... | 04/03/1984 |
| 4436168 | Thrust generator for boring tools The present invention provides an electrically powered system for advancing a rotary boring tool in situations where the inclination of the bore hole is such that the force of gravity does not provide sufficient forward thrust. One or more marine screw pr... | 03/13/1984 |
| 4432423 | Apparatus for extended straight line drilling from a curved borehole Apparatus by which a vertical borehole is curved to a new angle and extended through a production reservoir. A vertical borehole of a suitable diameter is extended downhole to the proximate depth of the production reservoir. A Zublin drill guide apparatus... | 02/21/1984 |
| 4427079 | Intermittently rotatable down hole drilling tool In a down hole drilling tool a closed valve is operatively moved downwards by pressurized drilling mud pumped down the drill string, the valve when it attains its lower position being opened and being returned under the influence of a spring or other upwa... | 01/24/1984 |
| 4422823 | Turbodrill The present invention relates to drilling equipment and more particularly to turbodrills, having a casing with multistage turbine stators fixed therein and a shaft mounted therein. The shaft is formed by a plurality of smaller shafts connected to each oth... | 12/27/1983 |
| 4415316 | Down hole motor In a Moineau type fluid motor one of the relatively rotatable elements is made of a deformable material, and axial movement of tapered surfaces within the element, caused by variation in the fluid pressure, causes adjustment of the sealing force in the mo... | 11/15/1983 |
| 4410054 | Well drilling tool with diamond radial/thrust bearings A turbodrill is disclosed for connection to a drill string and has a rotating shaft for turning a drill bit. The turbodrill has rotor and stator blades operated by drilling mud flowing therethrough to rotate the shaft. The shaft is provided with radial/th... | 10/18/1983 |
| 4406332 | Rotary earth boring tool The present invention provides a nonstalling system for advancing a boring tool in situations where the inclination of the bore hole with respect to the vertical is such that the force of gravity does not provide effective forward thrust. A hydraulically ... | 09/27/1983 |
| 4401170 | Apparatus for drilling underground arcuate paths and installing production casings, conduits, or flow pipes therein A directional drill attached to a drill string having periodic concentric collars is advanced in an inverted arcuate path to form a pilot hole underneath an obstacle followed by a larger concentric washover pipe. When the washover pipe reaches the surface... | 08/30/1983 |
| 4397619 | Hydraulic drilling motor with rotary internally and externally threaded members There is disclosed an hydraulic drilling motor for well drilling. The motor is of the push-down axial flow type. It is of vibration-free rotary chamber-type construction functioning with high torque wherein the r.p.m. and capacity of the drilling tool are... | 08/09/1983 |
| 4388973 | Direct drill bit drive A direct drive for a drill bit in a drill string has a fluid-operated motor within a drive section connected by a gear section to a bearing section whose inner tube is coupled to the drill bit to accommodate axial displacement of the drill bit within the ... | 06/21/1983 |
| 4386666 | In-hole motor drill with locking bit clutch An in-hole motor drill assembly has the rotor of the motor which may be connected to the drill bit through a shaft connected to the rotor, and a housing which may be connected to the running string, and a normally disengaged clutch between said housing an... | 06/07/1983 |
| 4372400 | Apparatus for applying pressure to fluid seals An apparatus is provided for applying pressure to a fluid seal positioned between a reservoir of a first fluid, such as lubricating fluid, and a source of a second fluid under pressure, such as a drilling fluid in a downhole drilling apparatus. A piston i... | 02/08/1983 |
| 4361194 | Bearing system for a downhole motor An improved bearing system for the driven shaft of a downhole motor is shown that provides a main thrust and radial bearing system having means for sealing the bearings in oil at equal or slight pressure above that of the drilling mud inside the drill pip... | 11/30/1982 |
| 4354558 | Apparatus and method for drilling into the sidewall of a drill hole A method of core cutting and apparatus operable on a seven conductor wireline logging cable for drilling a hole in the sidewall of a drill hole which comprises an elongted housing with a hydraulically operated backup shoe mounted within the housing for we... | 10/19/1982 |
| 4343370 | Turbo-coring device equipped with a following pipe This turbo-coring device comprises a tubular body provided with a coring bit and surrounded by a following pipe provided by a reaming bit. The tubular body is connected to the turbine through a fluid distributor having a side opening for discharging above... | 08/10/1982 |
| 4339007 | Progressing cavity motor governing system There is disclosed a control system for a hydraulic down-hole earth drilling motor of the helical gear pair type to control the pressure drop of the fluid through the motor so that it does not become excessive. A housing is provided defining a chamber, on... | 07/13/1982 |
| 4333539 | Method for extended straight line drilling from a curved borehole Method and apparatus by which a vertical borehole is curved to a new angle and extended through a production reservoir. A vertical borehole of a suitable diameter is extended downhole to the proximate depth of the production reservoir. A Zublin drill guid... | 06/08/1982 |
| 4330155 | Bore hole mining Minerals, in particular coal, that have been deposited in layers or along seams in the earth can be mined utilizing a large diameter bore hole drilling equipment. With the drilling equipment stationed on the surface of the earth, a drilling member is dril... | 05/18/1982 |
