Abstract:
A borehole reamer which may be deployed to a desired depth in an existing uncased borehole or below existing casing and used to substantially expand the diameter of the borehole. The diameter may be expanded by an amount that ranges from a fraction to a multiple of the original diameter of the borehole. In this fashion, geological formations containing oil, gas or groundwater which were previously uneconomical to produce may be worked into a condition of economical production. In a preferred embodiment, the borehole reamer is formed as an elongated assembly having an outside diameter which is sized to fit within a diameter of a conventional borehole. The assembly is preferably attached to drill pipe and lowered into a borehole to an appropriate depth corresponding to a pay zone of interest. A lower portion of the assembly, which is located at the deeper depth in the borehole, is constructed in the form of a bellows which functions as a pilot/anchor for the assembly. A group of deployable cutting elements are disposed above the bellows and below a sliding power transfer unit which forms the upper portion of the assembly and attaches to a drill stem.
Abstract:
In various embodiments, a mining device can include a first housing portion (22) and a second housing portion (24) where relative movement between the first and second housing portions can extend and/or retract a cutting member (28) with respect to the mining device. The mining device can further include a cable (30) which can be mounted to the second housing portion where the cutting member is mounted to the cable/and can be radially extended with respect to the first and second housing portions when the second housing portion is moved relative to the first housing portion along an axis. As the cutting member is extended, it can contact the sidewalls of a subterranean shaft to loosen material therefrom.
Abstract:
A system and method for downhole measurement for use with drill strings to reduce the borehole gap with respect to sensors carried by the drill string. In one embodiment, the sensors are mounted on a surface of the directional drilling hinged pad that comes in contact with the borehole wall. The hinged pad is pressed against the borehole wall as contact is made with the wall, thereby keeping the sensors at a minimum gap with respect to the wall. In another embodiment, the hinged pad is not used for directional drilling. Therefore the hinged pad is extended outward to the wall with the minimum necessary amount of force. Activation of the hinged pad can be initiated, for example, by flow of mud in the annulus of the string or through a user-provided command. The sensors can include resistivity, density, neutron, electromagnetic, acoustic, seismic, and NMR measurement sensors.
Abstract:
The present invention relates to a percussion hammer for enlarging drilled holes. The hammer comprises an external outer wear sleeve (5), an inner cylinder (7) mounted co- axially within the outer wear sleeve (5) , a tubular torque shaft (3) disposed axially and centrally of the hammer assembly, and extending longitudinally through the assembly. The hammer further comprises a sliding piston (6) mounted for reciprocating movement within the inner cylinder (7) and outer wear sleeve (10) and about the tubular torque shaft (3) to strike a hammer bit (1) for reciprocal movement in a chuck (4) adjacent a forward end of the hammer assembly. The hammer bit (1) has a central bore (46) through which the torque shaft (3) extends, such that the torque shaft (3) protrudes forwardly of the hammer.
Abstract:
The procedure of coupling consists in the procedure where after excavating starting pit and operation trench drilling and successive backreaming of pilot borehole is executed with simultaneous pulling-in pipe sections when coaxial force generated by drilling rig acts simultaneously and pulls-in drilling head with pipe line into borehole and where force generated by movement of piston of hydraulic chain stretcher pushes and seals finally the pulling head connection with pipe line. Equipment consists of drilling rig (4) with pulling head (15) through top of which passes pulling hanger (13) which is provided from the inner side of pulling head (15) with suspension eye (16) which pulling chain (7) passing through all pulled-in pipe sections is connected to and which is coupled with piston (20) of hydraulic chain stretcher (8) which is supported through thrust plate (19) on socket of the last pulled-in pipe section (3).
Abstract:
A system and method for automatically drilling and backreaming a horizontal borehole underground. The system includes a horizontal drilling machine and a machine control system for operating the drilling machine. The machine control system has sensors and control circuits for monitoring and automatically controlling the functions of the drilling machine. The machine control system manages the power consumption of the drilling machine, the fluid dispensed during drilling and backreaming, the lengthening and shortening of the drill string, the tracking and recording of progress along a selected bore path, and the guiding of the downhole tool along the selected bore path. In a drilling operation the method involves identifying a selected bore path and automatically guiding the downhole tool along the selected bore path. In a backreaming operation the method involves connecting a backreamer and a utility line to the drill string and automatically pulling the utility line back through the borehole.
Abstract:
The present invention relates to a grouting pipe equipment for underground water wells and a grouting method wherein concrete is cured on the interior wall of a bore hole in order to prevent a contaminated surface water and the like from flowing in the water well which is excavated for extraction of groundwater for use. Particularly, the present invention is concerned with a grouting pipe equipment for underground water wells and a grouting method using the same wherein an incasing (3) is installed in a suitable location by inserting the incasing (3) into a water well as deep as necessary and then, the concrete to be cured is supplied into the targetted area, thereby preventing inflow of the surface contamination, etc. into the water well.
Abstract:
The present invention relates to a soil consolidation apparatus, a tool and a method for soil consolidation. The tool comprises a drill string (17) of one or more drill tubes wherein a second chamber (36) for supplying grout to a jet grouting means (18) in the drill string is provided and a drilling means (16, 19) attached to one end of said drill string. The drilling means is a down-the-hole hammer (16) provided with a drill bit (19) for percussive drilling of a hole in the soil. The jet grouting means (18) is mounted in the vicinity of one end of the down-the-hole hammer (16) and comprising at least one lateral opening (40) in said drill string for jet grouting.
Abstract:
A rotary-percussion device for directional drilling in rock comprises a substantially cylindrical, rotatable body portion (15) housing a percussion hammer, and a frustroconical head (2) eccentrically mounted on the front of the body portion. The minimum diameter face (3) of the head is adjacent to the body portion. The axis (6) of the head is parallel to but offset from the axis (5) of the body. The front face (4) of the head is chisel-shaped and comprises at least one oblique plane (11) sloping forwardly in the same direction as the offset of the head axis relative to the body axis.
Abstract:
Systems and methods for drilling a geothermal well can include drilling a vertical borehole to a target location, drilling a plurality of lateral boreholes, each of which is connected to the vertical borehole, and can include generating a plurality of chambers in at least one of the plurality of lateral boreholes. The techniques can include drilling a plurality of passageways that each provide fluid communication between one of the plurality of chambers in a first lateral borehole and a second lateral borehole of the plurality of lateral boreholes. The techniques can form a fluid circuit for injecting a heating fluid such as water or brine and recovering hot water and steam using a single vertical borehole. The hot water and/or steam can be used to generate electrical power with a geothermal power facility.