Abstract: Method of cleaning tubular goods, especially sucker rods, and inhibiting the sucker rods against corrosion as the rod string is being withdrawn from a borehole. The method is carried out by the provision of an enclosure which is attached to the upper end of a cased borehole. The upper end of the sucker rod string is extended axially through the enclosure as the rod string is withdrawn from the casing. A medial length of the rod string is engaged by a resilient packer device which wipes the rod clean of well fluids and loose debris. The rod string is next cleaned within a second chamber by impacting the outer surface thereof with an abrasive substance. The rod surface is again cleaned of any residual material. The rod is then moved through another chamber where corrosion inhibitor is applied to the external surface of the rod.

Abstract: A drill bit for connection on a drill string has a hollow tubular body with an end cutting face and an exterior peripheral stabilizer surface with cylindrical sintered carbide inserts positioned therein. Nozzle passages extend from the interior of the bit body through the cutting face for receiving a removable and interchangeable nozzle member therein. The nozzle has a fluted or non-circular cross-section with grooved portions or out of round portions providing sufficient clearance for drilling fluid to continue to flow through the nozzle even when the main passage thereof is blocked with mud particles or the like. The cutting face has a plurality of recesses therein which receive, by an interference fit, a plurality of cutting elements of the type known as Stratapax, consisting of a cylindrical stud having an angular supporting surface with a cutting disc bonded thereon consisting of sintered carbide having a cutting surface of polycrystalline diamond.

Abstract: The present invention relates to a well clean out tool comprising an elongated body having first and second ends and being adapted to be received within a well borehole. The elongated body is comprised of a plurality of subs including a first sub at a lower portion of the body having a one way valve for permitting only upward flow of fluid. A second sub is arranged above the first sub for receiving and retaining fluid and debris passing through the first sub while a third sub is arranged above the second sub. The third sub includes a second valve for permitting flow only upwardly through the third sub. A fourth or pumping sub is arranged above the third sub with the fourth sub including an outlet for returning fluid to the borehole. The pump sub includes an elongated hollow piston reciprocatingly driven within a casing of the fourth sub.

Abstract: A dynamic seal for use between reciprocal concentric tubular members is disclosed herein and is especially adaptable for use in providing a dynamic seal between a movable piston and a sleeve in a downhole oil or gas well tool, such as a safety valve, a hydraulically actuated packer or a sliding sleeve. Each dynamic seal assembly comprises an elastomeric T-seal with cylindrical backup members positioned on either side of the central tip section of the seal member. The elastomeric T-seal is received within a central annular groove and a seal receptacle and the backup members are positioned within recessed ledges on opposite sides of the central groove. The backup members provide extrusion resistance for the tip section of the dynamic T-seal and overlap the T-seal to hold the seal in place.

Abstract: 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 point of intersection located below the lower end of the housing.Directional drilling of a borehole is carried out by actuating a drill bit by means of the down-hole drilling motor, and simultaneously therewith rotating the drill string--and consequently also the motor housing--over periods that are preceded and succeeded by selected periods over which the drill string is not rotated.

Abstract: A drill bit for drilling a rock foundation is provided having a bit face matrix for supporting a plurality of cutters, the matrix having one or more fluid passages for discharging a fluid to flow over the bit face. To enhance the cleaning and cooling of the plurality of cutters, the bit face matrix includes a nozzle for restricting the surface fluid flow area between the foundation and the bit face to create a high velocity radial fluid flow across the entire surface area of the bit face matrix. This fluid flow prevents debris from accumulating on the plurality of cutters thus providing cooling thereof. In addition, improved fluid distribution is provided by a spiraling dams structure extending from the nozzle radially outward over substantially the entire bit face matrix. This structure enhances the flushing of the debris from the bit face by accelerating the debris and drilling fluid to the outer diameter of the bit.

Abstract: A cutter bit wherein the dust collection openings are formed diametrically opposite each other, on an axis transverse to the longitudinal central axis of the bit body, and at least partly in the tapered dust control surfaces. The junctions of the heel surfaces and dust control surfaces define a pair of crown lines being parallel to one another and in planes which intersect the carbide insert in oblique fashion.

Abstract: A bridge plug for use in plugging a well at a subterranean location and adapted to be set in place by insertion through a tubing string. The bridge plug comprises an elongated vent tube supporting upper and lower petal basket structures, each of which comprises a plurality of petal leaves movable between a retracted position and an expanded position. In the expanded positions the petal leaves for the upper and lower baskets form conical configurations which face upwardly and downwardly respectively. Upper and lower fabric bags cover the respective petal basket structures respectively and extend over the inner and outer surfaces of the petal leaves. Each of the petal basket structures are further provided with conically shaped liners formed of an impermeable material inside the bags and interposed between the inner surfaces of the petal leaves and the conforming portions of the bags. The liners may be formed of an adhesion-resistant material such as fiber-glass fabric coated with a polytetrafluoroethylene.

Abstract: A cutting roller for a winning machine, which includes a tubular support and a number of helical blades on the tubular support provided with cutting picks arranged on the periphery of each blade, is provided with a hydraulic fluid spraying system which comprises a circumferential fluid distribution passage formed in the blade, connecting passages leading to the spraying nozzles and a radial bridging passage connecting the fluid distribution passage with the connecting passages. The fluid distribution passage and the bridging passage are grooves which accommodate plastic fluid-conducting tubes. The grooves are covered with covers of non-corrossive material which are releasably connected to the walls of the blade.

Abstract: A mine tool bit is retained in an open ended block with a cylindrical button insert transversely mounted in the shank of the bit, the insert having a cylindrical button extending radially outwardly from the shank and biased by a coil spring. The button must be manually depressed to insert or remove the bit from the block.

Abstract: A device for temporarily sealing a pipe; for example production tubing of an oil well comprises a body (8) defining a cylindrical chamber (8') and a piston (15) arranged to move in the chamber (8'). The chamber (8') has an outlet (14) at one end thereof, an inlet (12) axially spaced from the outlet (14), the chamber (8') providing a passageway from the inlet (12) to the outlet (14) for fluid flow through the chamber (8'). This piston (15) is movable from a first position to a second position. The piston (15) is resiliently biased towards its first position by means of a spring (21) and, on reaching the second position, is locked in that position. The piston (15) has mounted thereon, a collet (16) which seals the passageway, and which is movable relative to the piston (15), when the latter is locked in its second position, so as to open the passageway.

Abstract: A well completion and testing system and method. The system includes a tubing string having an integral locking sub and a testing probe assembly for use with well testing instruments and having an equalizing and bypass valve, the probe assembly being releasably lockable in the locking sub and adapted to be manipulated from the surface to open and close the valve for testing a well under both shut in conditions and flowing conditions. The method includes running a tubing string including an integral locking sub into a well bore, running a tool train including well testing instruments connected with a locking probe having an equalizing and bypass valve, releasably locking the probe in the locking sub of the tubing string, and selectively manipulating the probe from the surface to open and close the valve of the probe while taking measurements with the well alternately shut in and flowing.

Abstract: 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 by coupling throw-in members (13) introduced through the flushing passage from above. Passage through the working chambers and into the locking means detents groove (16, 20, 21) is rendered possible for the throw-in members on relative rotation of rotor and stator.

Abstract: 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 drill string simultaneously with the rotation of the drill bit driven by the downhole motor over periods preceded and followed by selected periods during which the drill string is not rotated simultaneously with the rotation of the drill bit driven by the downhole motor.

Abstract: A tool for the formation of holes without extracting the soil comprises a body having a cylindrical calibrating portion, coaxial portions with surfaces for the compaction of the soil and radii decreasing stepwise in the direction away from the calibrating portion, and terminating in an end piece. The body has also transition portions with surfaces for the compaction of the soil, forming a smooth transition from a coaxial portion with a larger radius to an adjacent coaxial portion with a smaller radius. The surface for the compaction of the soil of each coaxial portion is a conical surface having the configuration of a ribbon wound from the calibrating portion to the end piece and comprising the transition portions.

Abstract: A mining bit to be mounted for rotation in a bore of a support block or on a drill steel having a retention configuration opposite the working end. A bit shank is formed with an abutment flange at the insertion end and a recess adjacent said flange to receive flexed resilient fingers of a resilient retention ring during insertion of said ring in said bore. A fulcrum land supports an unsplit end of said ring. The resilient fingers carry an annular bulge projection which engages an annular recess in a support bore. The ring can extend the length of the retention shank to serve as a wear sleeve. With a drill steel, the retention ring is mounted on an extending insert to cooperate with a female recess in a hollow bit.

Abstract: A pneumatically inflated packer assembly includes spaced upper and lower inflatable sleeves which expand radially to anchor the assembly at a desired depth within a well screen. A porous, elastic bag exteriorly covers these sleeves so that the expanded sleeves stretch and tension the bag such that its intermediate portion between the sleeves tends to expand into cylindrical form so that it lies closely adjacent or against the interior surface of the well screen. In this way, a supply of porous material such as sand housed in an open space above the lower sleeve and below the upper sleeve is free to flow or migrate radially outwardly to substantially completely fill the cross section of the well screen. Groundwater flow into the well is now constrained to flow horizontally through the sand so that its direction and flow rate may be measured by a probe penetrating into the sand.

Abstract: The invention provides a high strength, twist resistant tubular goods system for traversing highly deviated sections of well bores capable of conducting fluids under high pressures. The system comprises short pipe joints interconnected by unions capable of uni-directional mis-alignment. Buoyancy material is incorporated to reduce drag and minimize gouging the bore hole walls.

Abstract: There is provided a well completion for electrical alternating current power transmission that minimizes power losses and related corrosion problems. Casing is used both as the electrode and conductor. Most of the conductor portion is made of nonmagnetic metal, for example aluminum, and is electrically insulated both exteriorly and interiorly. The insulation extends below the point where the nonmagnetic metal ends. Tubing is used to produce or inject fluids. The upper end of the conductor-electrode may be surrounded by a nonmagnetic surface string which is also electrically insulated.

Abstract: A pipe string with a valve, pressure responsive means, packer, firing mechanism and perforating gun are suspended within a well to complete the well. The packer is set to form an upper and lower annulus, and the valve and pressure responsive means are disposed above the packer in the upper annulus. A force transmission means extends from the pressure responsive means to the firing mechanism in the lower annulus. The valve is initially closed to prevent fluid flow through the flow bore of the pipe string. The upper annulus is pressurized to open the valve and create a pressure differential across the pressure responsive means. The pressure responsive means then transmits a force through the force transmission means to the firing mechanism to actuate the firing mechanism and detonate the perforating gun. Hydrocarbons from the formation then flows through the perforations and up the flow bore of the pipe string to the surface.