Abstract: A drilling tool, for example a core barrel inner tube assembly or a drilling bit, is attached to the inner end of a latch body which is removably seatable on a landing shoulder of a drill string. The inner end of the latch body mounts a drilling tool such as a core receiving tool or a drag bit. An overcenter toggle latch assembly is mounted to the latch body, the latch assembly including a pair of latches having inner ends pivotally mounted to the latch body, toggle links that at their one ends are pivotally connected to the outer ends of the latches and at their opposite ends have a retractor link extended through elongated slots. The retractor pin is extended through an axially elongated slot in the latch body to limit the axial movement of the pin between a position that the latches are locked in a latch seated position and a position retracting the latch body and the drilling tool attached thereto.
Abstract: An electrically-driven downhole coring method and apparatus which is powered by and conveyed to and from the bottom of the corehole by means of a heavy-duty electromechanical cable. The downhole core-sampling apparatus is equipped with a combination reamer, stabilizer, and external-reforcing component which also functions as an external axial-thrust weight, drilling-fluid circulation pump, and helical inertial-displacement elevator or excavated rock particles. During the high-speed rotation of the core-sampling apparatus by the downhole electric motor, drilling fluid with its load of excavated rock particles is displaced upward from the bottom of the corehole into the interior of a combination centrifuge/storage-chamber component where the excavated rock particles are separated from the lower-density drilling fluid and the clarified drilling fluid is circulated downward along a decreasing pressure gradient to the core bit, thus completing its circulation loop.
Abstract: A drilling tool, for example a core barrel inner tube assembly or a drilling bit, is attached to the inner end of a latch body which is removably seatable on a landing shoulder of a drill string. A latch retractor is mounted to the latch body for limited axial movement and has a latch assembly chamber opening inwardly to the closed end of the tubular portion of the latch body. The latch assembly includes a rigid transverse link that at opposite ends dependingly pivotally mount a pair of latches, there being no mechanical attachment of the assembly to the retractor or latch body. A transverse stop member limits the latch lateral sections movement inwardly toward the other from a latch seated position to a latch retracted position. At the inner end of the retractor, there are angularly spaced flanges extending radially toward the other in the chamber for retracting the latches as the retractor is withdrawn. The flanges are spaced to permit the assembly being extended therebetween and into the chamber.
Abstract: The present invention is a sidewall coring assembly and method for taking a core sample at an angle to an existing borehole. The assembly includes a core barrel run at the end of a drill string and having a whipstock suspended below it, the whipstock having an anchor packer at its lower end. The packer is hydraulically inflated through the core barrel and an hydraulic line extending from the bottom thereof, the core barrel is released from the whipstock and the hydraulic line, and lowered to core at the angle and azimuth dictated by the whipstock. After coring is completed, the core barrel is withdrawn from the well and subsequently the whipstock and packer are retrieved with a stinger run on the drill string.
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 core drilling tool system which allows for less stressful extended axial settings and adjustments in a core barrel environment. More particularly, the present invention discloses the formation of the setting device as a separate spacer apparatus which provides a setting method independent of the suspension of the inner unit in the outer housing of a core drilling tool thereby allowing for axial settings over a long adjustment path which are generally free of stress due to the weight of the inner unit.
Abstract: A wire line core barrel inner tube assembly has a latch body with a miximum diameter portion providing a shoulder seatable on a drill string landing ring and a fluid bypass channel extending through the maximum diameter portion and a valving assembly. The valving assembly includes a resilient valve seat in the bypass channel and a ball seatable on the valve seat to block fluid flow in a downward direction through the channel, movable upwardly off the valve seat from the seated position to permit fluid flow through the seat in the opposite direction and movable through the seat to a channel open condition after a preselected fluid pressure has been exerted on the ball in a direction to move the ball from the ball seated position and through the valve seat.
Abstract: A core drilling tool for drilling rock in underground soil formations which includes an outside pipe and an inside pipe therein that can be conveyed separately to the surface. The inside pipe includes a core-receiving receptacle at its lower end, and at its upper end is provided with a measurement unit for on-site acquisition, processing and storage of data, such as borehole, core and/or drilling process parameters.
Abstract: An auger-type of device has a hollow central shaft for taking undisturbed soil samples. The tip of the device has teeth for grinding soil from around the sample. The device comprises a helical conveyor for transporting the ground product upwards and away from the soil sample.
Abstract: A wire line core barrel inner tube assembly having a latch body that has a maximum diameter, axial intermediate portion providing a downwardly facing annular shoulder seatable on a drill stem landing ring and a fluid bypass channel extending through the maximum diameter portion and a valving assembly mounted by and cooperating with the latch body for controlling fluid flow through said channel. The valving assembly is operable to a position blocking the bypass channel but permits the inner tube assembly to move down faster than the fluid flow in the drill stem during the time the inner tube assembly moves downwardly in the drill stem.
Abstract: A core drilling tool for bore-holes includes a stem for connection to the string and an outer rotating tube for rotating a drill bit mounted thereon. A core tube is mounted in a central passage by a latch means to remove the core tube and/or replace it. The outer tube is rotated by a downhole motor such as a Moineau type motor. The diameter of the central passage through the stator is equal to the maximum diameter of the core tube plus the eccentricity of the stator to permit passage of the core tube into and out of the tool. Thus coring can be achieved without tripping the tool. Various details of the structure are described.
Abstract: A corebarrel for use downhole and having an outer tube and an inner tube which are relatively rotatable and interconnected through a bearing assembly, and a solid state survey device for use in oriented coring and disposed within the inner tube below the bearing assembly.
Abstract: Wireline core barrel fixing mechanism incorporating a fixer which prevents any wireline core barrel deformations, fixes the wireline core barrel to the hollow drill bit, and signals any drilling process interruptions. The wireline core barrel fixer comprises a cylindrical hollow body adapted to be mounted within the drill bit and incorporating selectively operated rollers for locking the hollow body to the drill, the rollers being mounted in planes parallel to each other and perpendicular to the geometrical axis of the cylindrical hollow body. The upper end of the fixer is connected to a cap, in the lower part of which opposite longitudinal slots are cut. The fixer is mounted inside a cylindrical hollow body, the upper end of which is connected to the stopper bar and in its lower part a locking bar and a set nut are mounted, connected to the fixer.
June 5, 1985
Date of Patent:
May 12, 1987
Vish Minno-Geolojki Institute
Nikolay D. Nenkov, Ivan B. Petrov, Stoyko P. Peev
Abstract: Coring of a subaqueous structure having a significant water pressure head on one side is carried out through a full port valve assembly mounted on the inner or dry side of the structure. With the valve open, the barrel of a coring device is inserted, and a core is cut and removed. The valve is closed to prevent inflow of soil and water. The hole from which the core has been removed can be sealed by injecting a grouting compound through the mounted ball valve assembly, or can be injected by means of a mechanical packer. The valve assembly permits coring to be interrupted, for example, to permit rail service operations through a subaqueous railroad tunnel.
Abstract: A fragmented or unconsolidated core can be cut and retained within a coring tool without substantial disturbance of the core by the use of a shrouded core catcher. A core catcher is concentrically disposed within the coring tool and outside of a smooth, cylindrical sleeve telescopically disposed inside of the core catcher. The core catcher in turn is coupled to a lower assembly which can be selectively longitudinally fixed within the coring tool, but which is otherwise temporarily coupled to the sleeve. As the sleeve is longitudinally pulled upward after the completion of the coring operation, the lower assembly becomes longitudinally fixed within the coring tool and the sleeve, which heretofore has fully covered and concealed the core catcher, begins to be withdrawn from the core catcher, leaving it unconcealed. Ultimately, the core catcher is at least partially uncovered, thereby permitting activation and contact between the core catcher and the core disposed within the coring tool.
Abstract: An improved anti-jamming mechanism for use in a coring tool is devised by providing a rotary jar within the inner barrel of the coring tool. The inner barrel is connected to a bearing assembly into which a bearing shaft is axially and concentrically disposed. The bearing assembly is rotatably journaled to the bearing shaft. The bearing shaft is rotatably and longitudinally fixed with respect to the outer barrel of the coring tool. The bearing shaft and bearing assembly are longitudinally displaceable with respect to each other by Bellville washers. The bearing assembly also includes a rotary anvil which is ultimately brought into contact with a rotary hammer which in turn is fixed with respect to the outer barrel. An impulsive torsional and longitudinal force is imparted by the rotary hammer to the rotary anvil through the resilient coupling between the bearing shaft and bearing assembly disposed within the inner barrel.
Abstract: The present invention provides disclosure of a core sampler that includes a rotatably extending outer barrel containing a relatively non-rotating core barrel which is extendable with the outer barrel in response to drilling mud pressure into the material to be cored by a mud turbine which rotates the outer barrel. The core sampler may be run in and out of a drill string on a wire line.
Abstract: The present invention provides a percussion actuated wire line sampler for use in a drill string. The sampler includes a core barrel adapted to be inserted into the drill string and to be freely movable therein. A hydraulic percussion device (16) also insertable and freely movable in the drill string is connected to the core barrel. A downhole mud turbine (20) is provided and is responsive to drilling mud pressure to actuate the percussion device to drive the core barrel out of the end of the drill string into the material to be sampled.
Abstract: A wire line core barrel for retrieving a core sample within a drill string. The wire line core barrel includes a conventional inner tube and also includes a generally cylindrically shaped retrieving assembly disposed above a generally cylindrical elongate body having a fluted periphery comprising a plurality of longitudinal ribs and longitudinal channels. Means for attaching the inner tube assembly to the drill string are mounted on the ribs of the elongate body. The channels of the elongate body provide a straight, longitudinal passageway for fluids flowing through the drill string.
March 19, 1982
Date of Patent:
August 21, 1984
Alexander F. Soinski, Frederick J. Soinski, William R. Soinski
Abstract: An inner tube 2 of a core barrel is releasably locked within an outer tube 1 by pivotable latch feet 32 engaging an annular recess 31 in the outer tube. A retrieving head 3 is slidably coupled via a pin 40 and slot 41 to the inner tube, and carries sealing rings 6 disposed, during coring, within a recess 5 in the outer tube to permit fluid passage. To retrieve a core sample in an ascending boring the pressure in the lower part of the column is reduced, whereupon the retrieving head drops by gravity to seal off the outer tube. A pin 37 on the inner tube then drops to cam release the latch feet and unlock the inner tube from the outer tube. Thereafter, as the lower column is drained, the inner tube and retained core sample descend by gravity down through the outer tube to a retrieval site.
Abstract: A method and apparatus suitable for stabilizing hydrocarbon cores are given. Such stabilized cores have not previously been obtainable for laboratory study, and such study is believed to be required before the hydrate reserves can become a utilizable resource. The apparatus can be built using commercially available parts and is very simple and safe to operate.
April 1, 1981
Date of Patent:
February 1, 1983
The United States of America as represented by the United States Department of Energy
Patrick L. McGuire, Bruce L. Barraclough
Abstract: An earth drilling device for extracting earth samples including a rotatable drill tube and means for rotating said drill tube, a drill bit supported by said rotatable drill tube, said drill bit and said drill tube defining an inner shoulder, a hollow probe movably disposed within said drill tube and adapted to be supported by said inner shoulder, an exchangeable plastic sleeve disposed within said hollow probe, and means for extracting said hollow probe and associated plastic sleeve containing an earth sample without removing the drill tube from the earth.
Abstract: Core drilling apparatus that includes a wire line core barrel inner tube assembly movable through a drill stem to be seated in a latched core taking position adjacent the drill stem core bit and an overshot assembly coupled to the inner tube assembly for lowering and/or withdrawing the inner tube assembly in the drill stem. The inner tube assembly includes an overshot coupling assembly having a base member extended into the latch release tube for limited movement relative thereto, a spearpoint assembly connected to the base member for pivotal movement through an angle of about 180.degree. about a transverse pivot axis, and a detent plunger resiliently mounted by the subassembly to extend into a base recess when the central axes of the base and coupling members are nearly aligned to releasably retain said members in relative positions that their axes are aligned, and to abut against a base tapered surface when the subassembly central axis is at a substantial angle relative the base central axis.
Abstract: In a hollow stem auger for earth boring of the kind having spring loaded valve members at the bottom of the stem to permit the passage of test implements such as corers and vane test implements, the auger bit is constructed with a cage formation enclosing the valve member and supporting a bottom ring carrying cutting teeth. Interference of the valve members with a test implement is prevented by using an uncoupleable cylindrical sleeve surrounding the implement which sleeve can be lodged between the valve members to hold them open during use of the implement.
Abstract: A cable-type core barrel comprising, within a set of outer tubes provided lowerly with a drill bit, an inner tube provided at its bottom with an extractor cone and at its top with a hooking head provided with an upper cone frustum hook and a release cone, the inner tube being lockable in the core boring position by a tongue latch supported by a tubular latch support which is rigid with the inner tube and does not affect the release of this latter. The core barrel is fitted with an inshot comprising a lower longitudinally slotted bell member connected to a rod extending upwards, an upper hooking head comprising an upper cone frustum hook and rigid with an intermediate tube extending downwards, a helical spring housed between the intermediate tube and the rod, and resting on supports on said intermediate tube and said rod, and a threaded ring which is screwed on to the intermediate tube and when in its lower position surrounds the bell member.
Abstract: An open-spindle earth sampling apparatus for taking and retrieving core samples of coil comprising a drilling apparatus having rotary power means, a hollow auger section, a hollow-centered drive shaft connected to the drilling apparatus, a gimbal ring auger coupling and a sampling device suspended into the hollow auger section by means of a reelable hoist cable. The hoist cable is attached between the drilling apparatus and the sampling device and the gimbal ring auger coupling bearingly connects the hollow auger section to the drive shaft. The sampling device includes a rotatable locking portion and a pivotally-stationary, thin-walled sampling tube which is bearingly connected to the rotatable locking portion. The rotatable locking portion is rigidly secured to the hollow auger by a pair of expandable latches such that the thin-walled sampling tube projects from the end of the hollow auger.
Abstract: The motor is adapted to be used to drive a rotary drill rod of the type comprising an elongated pipe having a longitudinally extending bore therethrough, a percussive bit at the distal end thereof, and an abutment thereon relatively transverse the bore adjacent the bit. The motor comprises a cylindrically outlined piston member which is adapted to be slidably engaged in the bore of the pipe and has a fluid operated hammer mechanism thereon for applying hammer blows to the rod through the abutment. It also comprises an anvil member which is coaxially interconnected with the piston member at a position relatively forwardly of the hammer mechanism and has a diameter no greater than that of the piston member so that it can be inserted in the bore ahead of the piston member and engaged with the abutment to receive and transmit the hammer blows into the abutment.
Abstract: A wire line core sample retrieval apparatus includes an improved core barrel head assembly having a special lifting collet designed to engage with an overshot. The head assembly includes improved latches and cam means designed to positively retract them when lifting forces are applied to the lifting collet. The overshot includes a special locking collar and associated assembly to provide positive locking engagement with the lifting collet as well as providing easy locking and unlocking of the overshot from said lifting collet either in the well hole or on the surface.
Abstract: Apparatus for interchanging the central portion of a drill tool with a core barrel is disclosed. The interchange is effectuated without the need for raising the drilling tool with the drive turbine. Both the core barrel and the central portion of drilling tube have barrel tubes associated therewith and a seating associated with a receiver tube rotating with the tool holds the barrel tube in a vertical position. The end of the core barrel is spaced from the inside end of the barrel of the drilling tool to avoid friction and facilitate the cutting of the core.