Abstract: The invention is a control device or directional drilling tool. The control device has an electromotor drive in the orienting device. The measuring and control device is situated between the orienting device and the drill string. Cable lead-throughs through the orienting device are eliminated. The electromotor drive of the orienting device can be actuated independently of drilling operations, making it possible to perform a rapid and precise performance of an orientation process while continuing drilling operations, reducing deviations from the planned drilling program.

Abstract: The present invention discloses a drilling tool apparatus and method for sinking drill holes in underground rock formations while using a selectable direction profile for the drill hole.

Abstract: The present invention pertains to a device and method for drilling a secondary or deflection hole from a cased drill hole in underground rock or geologic formations. The device disclosed herein includes a deflection wedge unit mountable via a packer in the drill hole and a pilot cutting tool, all mountable to a drill string. A deflection guide actuated by deflection ramp on the deflection wedge unit initiates the deflection drilling process.

Abstract: The present invention comprises a novel method and apparatus for sinking drill holes in underground rock formations while generating drill cores as rock samples. More particularly, the present invention discloses a method and apparatus which allows for an expanded analysis of ground formations over a larger area through the extraction of drill cores as rock samples. The method and apparatus herein disclosed allows one to drill a number of core shaft sections from the base of a main shaft section in various directions in order to obtain a number of sample cores.

Abstract: The present invention comprises a drilling tool including a retractable pilot drilling unit driven by a fluid operated motor, the motor comprising a stator mounted on the interior of a tubular outer housing and a rotor mounted on the exterior of a tubular inner housing axially supported in said outer housing and rotationally free with respect thereto. The pilot drilling unit is rotationally fixed within the inner housing, but axially moveable therewithin so that pressure of drilling fluid used to drive the motor will also act on reaction surfaces of the pilot drilling unit to urge it axially forward. The top of the pilot drilling unit includes a fishing head for retracting the pilot drilling unit from the drilling tool, and reinserting it therein.

Abstract: The present invention comprises a novel method and apparatus for sinking drill holes in underground rock formations while generating drill cores as rock samples. More particularly, the present invention discloses a method and apparatus which allows for an expanded analysis of ground formations over a larger area through the extraction of drill cores as rock samples. The method and apparatus herein disclosed allowed one to drill a number of core shaft sections from the base of a main shaft section in various directions in order to obtain a number of sample cores.

Abstract: The present invention comprises an improved method and apparatus for taking core samples, wherein a core drilling assembly driven by a downhole fluid motor is retrievably housed within a drilling tool of larger diameter, and wherein a plurality of cores may be cut and retrieved to the surface by withdrawal of the core drilling assembly by including an extender in the core drilling assembly each time it is brought to the surface and returned to the drilling tool, and sequentially cutting another core without postdrilling the previously cored formation section. The extenders may be included either above or below the motor used to drive the core drilling assembly, and are preferably of tubular configuration with screw-threaded connectors at their ends for rapid insertion in and removal from the core drilling assembly.

Abstract: An apparatus for producing pressure pulses in an oil well fluid medium is established which includes a main valve member moveable relative to a supporting member by a pressure gradient between two flow channels. The main valve body is longitudinally moveable relative to the supporting body, and a gap is provided between the two bodies. The gap is opened for fluid flow which prevents the development of dead water zones and the buildup of sedimentary deposits to prevent restriction of movement between the two bodies. The gap includes one or more throttle zones to assist in maintaining the necessary gradient between the two flow channels.

Abstract: A tool face orientation of a directional drill bit within a borehole is efficiently communicated to the well surface by communicating only changes in the tool face orientation. In the first embodiment after the entire tool face orientation is measured and transmitted uphole, and thereafter changes of the tool face orientation as measured with respect to the center of spatially fixed sectorial ranges are transmitted uphole. The magnitude of the changes relative to the center of a fixed sectorial range, being smaller than the range of the entire tool face orientation, allow the subsequent transmission to be made using words of shorter length. Alternatively, the changes in tool face orientation may be measured with respect to a sliding reference point. The sliding reference point may, for example, be the mean value of the prior ten measurements and any previous mean values.

Abstract: A deep-borehole drilling device comprising a drive unit such as a downhole motor and a driven unit such as a generator in which a drive transmission coupling is provided in the form of a contact-free magnetic coupling. The magnetic coupling may be a permanent magnet coupling with the magnets arranged coaxially and is preferably a can-tube coupling comprising an outer magnet carrier and a can-tube disposed coaxially within said outer magnet carrier.

Abstract: A downhole telemetry system for transmitting signals from a subterranean region in a well to the surface of the earth while drilling employs changes in the mud pressure encoded in digital form. The changes in mud pressure are accomplished by two balanced valves, one of which increases pressure by control of flow within the drill string, the other of which controls flow from the drill string to the annular between the drill string and the well.

Abstract: A device for delivering flowable materials from a production bore (2), consisting of a source of pressurized medium (1), a pressurized medium conduit (3) for conducting the pressurized medium into the bottom area of the bore, the pressurized medium being used to operate drive means (5) coupled to a pump (6) for the flowable material. The drive means (5) and the pump (6) are both rotary displacement devices having a spiral rotor (10, 12) which describes an eccentric rotational path within a spiral stator (11,13). The rotor (10) and the stator (11) of the drive means (5) and the rotor (12) and the stator (13) of the pump (6) have the same eccentricity and are rigidly connected to one another.

Abstract: A device for use in underground drilling comprising:a tubular housing,a down-hole motor mounted within the housing and having an output shaft,means for connecting said output shaft to a drill bit,means for connecting said housing to a drill string,first and second stabilizers mounted on said housing,said first stabilizer being mounted nearer than the second stabilizer to the output shaft connecting means,at least one of said stabilizers being an eccentric stabilizer, andat least one stress relieving means between the first stabilizer and the means for connecting the housing to the drill string.

Abstract: A compensation device for deep-well drilling tools with a transversely divided outer pipe, the pipe members (1 and 2) of which can be rigidly connected to one another by a screw thread (8) and comprise adjacent end faces (5 and 6) as stop faces which approach one another when the pipe members are screwed together and move apart from one another during the unscrewing, comprises a spacing member (3) which can be inserted radially, from the outside, between the end faces. The screw thread (8) has a length of engagement which secures the firm connection between the pipe members within the whole preset compensating range.

Abstract: A base powder mixture consisting of diamond material and solid support is inserted into the recess of a mold block for the manufacture of cutting elements for, in particular, deep drill bits, the mold block is then externally hermetically enclosed and hot isostatically pressed. The base powder mixture is, first of all, inserted directly into the recess, the mold block is then enclosed as a whole in a capsule and placed in a high pressure furnace in which pressure is applied to the mold block by a liquid or gaseous pressure medium and, finally, after cooling and lowering of the pressure, the capsule is removed and the finished cutting elements are taken out of the recess.

Abstract: A cutting member for rotary drill bits for deep-well drilling in ground formations consists of a carrier member (1) with a supporting surface (3) and a supporting member (4) of hard metal rigidly connected to this at its back and with a cutting layer (5) of polycrystalline synthetic diamond material. The supporting member (4) together with its cutting layer (5) is cut out of a circular cylindrical shaped body or made as a segment and together with its cutting layer occupies only a portion of the supporting surface (3) of the carrier member (1), the remaining supporting surface being occupied by a supplementary member (6) of hard metal or other high-strength substances. With regard to the cutting performance and effect, the same requirements are met as with a circular diamond cutting plate while at the same time considerable savings are achieved in valuable diamond material.

Abstract: An apparatus for the remote transmission of information from a borehole (1) to the surface of the earth is disposed in a drilling pipe string (4) of a drilling device. The drilling device further comprises a rotary drill bit (3) and a pump (5) which pumps the flushing liquid (6) downwards in the flow passage (11) of the drilling pipe string, through the rotary drill bit (3) and upwards in an annular space (7) surrounding the pipe string. The apparatus has devices for ascertaining information data (8), for converting the information data into electrical control signals (9) and for producing pressure pulses (10) in the downwardly directed flow of the flushing liquid (6). The devices are disposed in a chamber (13) which is bounded internally by the flow passage (11) and externally by an outer tube (12).

Abstract: Cutting elements, for example of polycrystalline sintered diamond, the cutting faces of which are set differently to the cutting direction, are disposed on a rotary drill bit. One group of cutting elements has its cutting faces substantially perpendicular to the cutting direction (straight set cutting elements) while other groups of cutting elements are at an acute angle to the cutting direction (obliquely set cutting elements).Because of their greater pressure per unit area, the obliquely set cutting elements penetrate more easily into plastic formations and can tear these up. The straight set cutting elements, which do not develop a great pressure per unit area, but work over a wider range, can better pare off the formation prepared by the obliquely set cutting elements.

Abstract: A device for the remote control of data out of a drill hole to the earth surface during the operation of a drilling device which comprises a drill bit, a drill string and a pump raising a flushing liquid into the surrounding annular space of the drill hole and downward into flow channels of the drill string, consisting of devices arranged in the drill string for the ascertaining of desired informational data for the conversion of the informational data into a series of electrical control signals for the producing of pressure pulses in the downward directed flow of the flushing liquid as a function of the control signals and for the production of the necessary electrical energy, characterized in such a way that the devices part of a coaxial support within the flow channels of the drill string form a structural unit and are arranged over each other; separated axial sections of the structural unit are grouped and that at least the topmost section of the structural unit is constructed as an independent component

Abstract: Adjustable torsional type latching means (5) for triggering a mechanical well jar tool comprises torsionally actuated gear racks (20,22) including acme threads or teeth which extend axially on opposite adjacent side portions of telescopic parts (1,2). The gear rack teeth which mesh in the latched position have incline tooth faces that can be disengaged by applying a strong axial force which torsionally stresses and rotates a torsion sleeve (16) portion of one telescoping part (1) and gear rack (20) thereon away from the other part (2) and gear rack (22). Upon release of the latching device (5) the telescopic parts (1,2) of the well jar and the kinetic energy stored therein are freed for a limited longitudinal jarring movement. The torsion sleeve portion (16) has an end portion connected to the other telescopic parts by a second slot-spline-gear (15) of relative short axial length, which serves as a torque support in the latched position and becomes deengaged during a jarring stroke.