Abstract: An integrated well logging system includes an elongated stem portion configured to lower the well logging system into a hydrocarbon well, a multi-finger calipers for measuring the internal diameter of the annulus of the hydrocarbon well, the multi-finger calipers comprising a plurality of measuring arms, a first crossover configured to connect the stem portion to the multi-finger calipers, a static bottom hole pressure survey configured to measure the pressure at a location within the hydrocarbon well, the static bottom hole pressure survey comprising a plurality of memory gauges, and a second crossover configured to connect the multi-finger calipers to the static bottom hole pressure survey.

Abstract: A hydraulic jar for delivering impacts downhole. The jarring mechanism includes a cup-type piston that moves through a seal bore. The cup is deformable in response to fluid pressure so that it expands each time it moves through the seal bore to compensate for wear on the lip. Since only minimum interference is required between the piston and seal bore, less material may be used. This reduces the force required to reset the tool, which is particularly advantageous in horizontal wells. The seal bore may be slightly wider at the exit; the cup expands to this exit diameter, ensuring an interference fit as the cup travels back through the smaller diameter entry section. The entry end of the seal bore may include longitudinal grooves. This prevents the piston cup from rupturing by preventing a fluid seal around the lip until the most of cup is inside the seal bore.

Abstract: A steerable ground piercing tool includes an elongated outer housing having a lengthwise extending bore and an inner assembly at least in part disposed within the outer housing. The inner assembly includes a rotatable chisel having a longitudinally extending shaft at least in part disposed within the housing bore. The chisel has a first end defining an asymmetric tip and a second end defining a first impact surface for receiving a reciprocating action impact to drive the tool through the ground. The inner assembly further includes a conversion mechanism to selectively convert upon activation thereof at least a first portion of the reciprocating action imparted to the first impact surface into combined reciprocation and rotation of the tool.

Abstract: A steerable ground piercing tool includes an elongated outer housing having a lengthwise extending bore and an inner assembly at least in part disposed within the outer housing. The inner assembly includes a rotatable chisel having a longitudinally extending shaft at least in part disposed within the housing bore. The chisel has a first end defining an asymmetric tip and a second end defining a first impact surface for receiving a reciprocating action impact to drive the tool through the ground. The inner assembly further includes a conversion mechanism to selectively convert upon activation thereof at least a first portion of the reciprocating action imparted to the first impact surface into combined reciprocation and rotation of the tool.

Abstract: A Seismic source comprising an actuator having a rotary part (104) and a reciprocative part (105), conversion means (109) in the form of corrugated surfaces to convert a rotation of the rotary part (104) into a reciprocal movement of the reciprocative part (105), and a vibrator body (106) that is connected to the reciprocative part (105) of the actuator by means of a spring (107).

Abstract: A method and apparatus for allowing a downhole drill string to be stuck at one location and continue to rotate above the stuck section. The apparatus provides a method for collapsing the stuck subassembly by reducing its outside diameter. Simultaneous with the subassembly collapse, a jarring action is initiated from within the drill string to further loosen the stuck sections. At the same time drilling fluid inside the string is allowed to circulate outside the string through a circulation sub. The fluid is forced around the stuck subassembly further increasing the likelihood that the subassembly will be freed.

Abstract: The invention relates to a method for horizontal drilling with a percussion implement and a percussion head or percussion head element mounted in a movable manner relative to the percussion implement, the percussion impulse being transmitted in at least three steps.

Abstract: A bedrock drilling and excavating apparatus receives power from a rotational power source to drive a drill to strike and shatter bedrock under the gravity of the apparatus and reciprocal vibrations of a pneumatic unit located on the apparatus. The apparatus includes a coupling device to couple with the rotational power source and an air intake vibration structure, a coupling sleeve which has one end coupling with the lower end of a coupling axle and a connector which further couples to the pneumatic unit, and a drill coupling to the pneumatic unit. The pneumatic unit drives the drill to vibrate up and down reciprocally to strike and shatter bedrock. The drill has a drill shell which is alterable according to the diameter of the service shaft without changing the diameter of the pneumatic unit. The drill shell has a plurality of conical drill gimlets mounted thereon in different biased angles to shatter the bedrock and improve drilling and excavating effect.

Abstract: A torque absorber is disposed on a drill string near the motor. The torque absorber automatically adjusts the weight on a drill bit and reduces the likelihood of motor stall caused by resistance to drill bit rotation. The torque absorber includes an upper unit assembly and a lower unit assembly. The upper unit assembly includes a top sub and a ball body. The lower unit assembly includes a bottom sub, a lead screw, and a ball retainer. The components of the lower unit assembly are free to rotate as a result of motor back torque, which is in a direction opposite of the direction of rotation of the drill bit during normal drilling. The upper unit assembly will remain stationary while the components of the lower unit assembly rotate in this opposite direction. A spring applies a force on the lead screw.

Abstract: An apparatus including a bore bit comprising a bottom part having an active bottom face and a top face substantially parallel to the active face; a top part fixed to suspension cables and having a bottom face facing the top face of the bottom part; a member for limiting the maximum spacing between the two parts; a cylindrical axial bore passing through both parts; a cylindrical guide penetrating into said bore; and at least one ramp-forming recess and at least one ramp-forming extension for co-operating with said ramp-forming recess in such a manner that movement of the top part towards the bottom part is converted into rotary movement of said top part about the vertical axis, with the end of said rotary movement of the top part imparting rotary movement to the bottom part.

Abstract: A device for drilling holes, including a drill bit with a drilling or breaking surface, a drill rod for introducing a rotary or percussive force and for introducing a rinsing or cooling fluid into the drill bit and a sheath pipe which defines a hollow space between the drill rod and the inside of the sheath pipe and which is supported on the drill rod or which can be connected to the drill bit. In a drilling position, the sheath pipe is situated at a distance from the rear side of the drill bit facing away from the breaking surface and the drill bit can be introduced into a rinsing position for the hollow space between the sheath pipe and the drill rod with its rear side resting on the front end of the sheath pipe facing towards the drill bit or can be connected to the front end of the sheath pipe.

Abstract: An apparatus and method for directional drilling utilizing a fluid hammer. The fluid hammer is coupled to a bent steering member which, in turn, is coupled to a drill string. The bent steering member includes means for rotating the fluid hammer independently of the bent steering member. The means for rotating may be a mud motor or a dual drive, pipe-in-pipe mechanism. The fluid hammer may be directed by rotating the drill string and bent steering member to point the fluid hammer in a desired direction. The bent steering member may include a sonde for monitoring its orientation. Fluid pressure capable of activating the fluid hammer is conveyed to the fluid hammer by means of the drill string.

Abstract: A method and system for drilling creating a wellbore which, in at least certain aspects, includes positioning a drilling apparatus at a desired location at the earth surface, the drilling apparatus having rotating and hammering apparatus for simultaneously rotating and hammering a dual tubular string into the earth, the dual tubular string with an outer casing string spaced apart by an annular space from an inner drill pipe string, both the outer casing and inner drill pipe string being hollow, a drill bit secured to a lowermost end of the inner drill pipe string and, optionally, a casing drill apparatus secured at a lowermost end of the casing string, drilling through the earth to form the wellbore by simultaneously rotating and hammering the dual tubular string with the drilling apparatus; and, in certain aspects, installing a geothermal heat loop and grouting the space around it.

Abstract: A working tool for use with a percussion power tool and including a cushioning elongate stem (3), and a head (4) connected with the stem (3) for joint rotation therewith and for a limited axial displacement relative thereto, with the tool head (4) being adapted, with respect to its resistance associated with its cushioning properties, to characteristics of the percussion piston (5) of the power tool and with the tool stem (3) and the tool head (4) having mutually abutting each other end surfaces (10) which form at least a partially flat contact upon abutting each other.

Abstract: A subsurface explorer (SSX) for exploring beneath the terrestrial surface of planetary bodies such as the Earth, Mars, or comets. This exploration activity utilizes appropriate sensors and instrument to evaluate the composition, structure, mineralogy and possibly biology of the subsurface medium, as well as perhaps the ability to return samples of that medium back to the surface. The vehicle comprises an elongated skin or body having a front end and a rear end, with a nose piece at the front end for imparting force to composition material of the planetary body. Force is provided by a hammer mechanism to the back side of a nose piece from within the body of the vehicle. In the preferred embodiment, a motor spins an intermediate shaft having two non-uniform threads along with a hammer which engages these threads with two conical rollers.

Abstract: A hydraulic impact tool for use in a well, such as an oil or gas well, comprising a movable hammer which is arranged to prestress a spring by means of a hydraulic piston (16) provided with a through channel (20), and in which a movable sealing body (22, 45) is arranged to enable closing of the channel (43), so that hydraulic force from fluid under pressure applied to the impact tool, may displace the piston (16) and the hammer and prestress the spring, and in which the sealing body (22) is arranged to follow the piston (16) into an end position for so to open the channel (20) for throughput, so that the hydraulic force acting on the piston (16, 41) ceases, and the prestressed spring is released and drives the hammer to strike, at the same time as the piston (16, 41) returns to initial piston, whereafter the process is repeated. The sealing body (22) is arranged to close said channel (20) when the sealing body is subjected to a predetemined frictional force from fluid flowing through the impact tool.

Abstract: An actuator for effecting bottom hole rotation consisting of an upper wash pipe having a spiral groove mandrel that is in operative association with a ball clutch assembly that is secured to the upper wash pipe. The weight placed on the actuator at the wash pipe connection is effective to drive the mandrel and ball clutch assembly through a given amount of rotation, e.g., five rotations per actuation can be applied to a selected working tool.

Abstract: Extendable bit teeth are supported by the guide grooves formed on the end face at the point of a bit body in such a manner as to be slidable. The extendable bit teeth slide along the guide grooves in an excavating direction to thereby project from the end face at the point of the bit body. The extendable bit teeth slide in an opposite direction to the excavating direction to project from the outer periphery of the point of the bit body. Since the extendable bit teeth are pressed against the ground during excavation, the extendable bit teeth projects from the outer periphery of the point of the bit body so that the bit gauge can be extended, and most of the excavation hole is excavated by the bit body.

Abstract: A downhole oil well tool uses impact, reciprocal drilling and an improved rotating bit or like working member, receiving both fluid pressure and weight from an elongated pipe string with a flow bore in order to drive the tool. A valve within tool housing controls fluid pressure to the working end so that the tool pressures up, then releases pressure through the working member allowing the pipe string to load the bit, creating impact. A clutch rotates the working member during drilling to prevent imprint upon the formation. A bias spring is provided to control and adjust the amount of weight on the bit independent of pipe weight.

Abstract: A downhole oil well tool uses impact, reciprocal drilling and an improved rotating bit or like working member, receiving both fluid pressure and weight from an elongated pipe string with a flow bore in order to drive the tool. A valve within tool housing controls fluid pressure to the working end so that the tool pressures up, then releases pressure through the working member allowing the pipe string to load the bit, creating impact. A clutch rotates the working member during drilling to prevent imprint upon the formation.

Abstract: A drilling jar is disclosed. The jar has particular application in directional drilling operations and includes a swivel which allows the drilling jar to operate substantially independently of any right hand torque that becomes trapped in the drill string. The swivel includes a bearing cage that engages the polished stem of the drilling jar to the jay stem of the drilling jar. This bearing cage holds a number of bearings against the jay stem and the polished stem. The swivel allows the jay stem to rotate substantially independently of the polished stem. The drilling jar may further include splines formed onto the outer surface of the polished stem for transmitting torque from the polished stem to the barrel of the drilling jar without simultaneously transmitting torque from the polished stem to the jay stem.

Abstract: A mechanical jar used primarily on drill strings, in earth boreholes, to aid in freeing drill strings stuck in a well bore. A telescoping drill string component is constrained in a selected telescoped condition by a biased lock until enough axial stress is applied to the telescoped jar to release the lock. Energy stored in the stressed length of drill string then moves rapidly to strike a solid limit to the telescoping travel. The inertia of the moving part of the drill string applies a shock to the stationary, downwardly continuing part of the drill string. The shock is to aid in releasing the stuck string situation. The tension required to release the lock is adjustable, as a design alternative, by applying torque to the drill string. The jar can, by design alternative, be used to strike in either or both axial directions.

Abstract: The rotary drilling jar includes inner and outer mandrels releaseably locked against relative longitudinal movement. The inner mandrel is connected to the drilling string and the outer mandrel is connected to the drill bit or other well tools suspended below the jar in the well bore. A detent mechanism releaseably connects the inner and outer mandrels and includes a stack of Belleville springs that is configured to determined the amount of force required to move the detent mechanism to unlock the mandrels to permit relative longitudinal movement. In one aspect, the jar also includes an upwardly facing shoulder on the inner mandrel and outwardly facing shoulder on the outer mandrel that are in engagement when the jar is being lowered into, suspended in, and pulled from the well bore to prevent the imposition of string weight on the detent mechanism.

Abstract: A percussion boring tool is disclosed for boring in the earth at an angle or in a generally horizontal direction. The tool has a steering mechanism substantially as shown in a copending patent application and a cylindrical body with overgage sleeves located over a portion of the outer body affixed so that they can rotate but cannot slide axially. The overgage areas at the front and back of the tool, or alternately, an undergage section in the center of the tool body permits a 2-point contact (front and rear) of the outer housing with the soil wall as opposed to the line contact which occurs without the undercut. The 2-point contact allows the tool to deviate in an arc without distorting the round cross-sectional profile of the pierced hole. Thus, for a given steering force at the front and/or back of the tool, a higher rate of turning is possible since a smaller volume of soil needs to be displaced.

Abstract: An apparatus is described for forceably pulling a well casing down into a drilled hole from the casing bottom end during a percussion drilling procedure, through use of the percussion drill tool. An anvil is fixed to the casing and projects inwardly to coact with the hammer surface on a precussion bit. The bit includes an interlock feature that allows selective disengagement with the anvil and allows the bit to be lowered past the anvil for drilling purposes. The anvil is situated above the drive shoe along a lower casing section. The lower casing section acts as a material accumulator, cooperating with the drilling bit and anvil shoulder to seal drilled areas and facilitate removal of drilled material from the drilled hole.

Abstract: The invention relates to destructive crossovers for explosive logic circu, wherein two crossing paths of explosive material are embedded in a substrate in two separate planes. The first path which detonates across the intersection destroys the intersection so that the second path may detonate only to that point. The invention provides for minimal detonation pressure at the intersection, so as to avert the prior art problem of detonations turning the corner. This is accomplished by placing the paths on different planes.