There is provided a wire line core drilling apparatus including an elongated assembly which is hydraulically propelled along the interior of a drill string to a desired location adjacent the bit end of the drill string under the influence of a moving pressurized liquid within the drill string, characterized in that said elongated assembly is provided with an annular cup seal having a flexible annular lip thereon which expands radially outwardly under the influence of liquid pressure thereon to s...

An apparatus is disclosed to allow efficient setting and release from a liner packer connected to a liner assembly. The polished bore adjacent the packer is protected from debris since the setting procedure takes place while the polished bore remains protected. Movements necessary to accomplish the setting procedure occur principally at the uphole end of the polished bore to minimize adverse effects on the integrity of the polished bore from such movements in an area where subsequent operations ...

A downhole tool, comprising one or more separate packers and sliding sleeves in the preferred embodiment, is actuable from a nonelectrical signal transmitted from the surface to the tool. The signal is received at the tool by a control system located within the tool. The control system operates in conjunction with a power supply in the tool to accomplish tool actuation. In the preferred embodiment, the valve member is temporarily retained in a sealing position, isolating pressure in one chamber ...

The present invention is directed to an auger attachment which is mounted on the stick of a backhoe which provides directional capabilities to the auger. More specifically, the auger attachment includes an outer body, an inner telescoping body and a piston within the inner body which provides all the lift to the auger.

According to the present invention, the production of petroleum from a petroleum-bearing subterranean formation penetrated by a wellbore is accomplished by (a) fracturing the subterranean formation and injecting a conductive proppant into the fracture, the conductive proppant comprising particles which are at least partially coated with a heat hardenable, conductive resin to create a fluidly and electrically conductive fracture in the formation; (b) passing an electrical current into the formati...

A method and apparths for filling and circulating drilling fluid in a wellbore during casing running operations is disclosed. A fill/circulate tool is placed partially within the upper end of a casing string so that fluid may be pumped into the interior of the casing string. The tool has a self energizing seal element which engages the interior wall of the casing string when the tool is fully lowered therein, said seal element being energized by the pressure of the fluid in the casing string so ...

A golf tee drill comprising a cylindrical casing having a removable cap at a first end. A spring is mounted in the removable cap. An electric motor is provided, having a rotatable shaft. The motor is secured within a second end of the casing. A battery is within the casing between the spring and the motor. A switch is on the casing and is electrically connected between the motor and the battery. An auger drill bit is also provided, having a cone shaped collar. A coupling assembly is for attachin...

A mole launcher which has a hydraulically powered, double-acting piston and cylinder unit to push or pull a slider. The slider carries a drill head connected to a drill string. The other end of the drill string carries a mole to bore an underground passage. By releasably locking the slider to the front of the launcher, the cylinder can be moved between a first position in which it projects beyond the chassis of the launcher, and a second position in which it is placed only within the length of t...

A method and apparatus for communicating signals from within an encased borehole including a wireless communications system for transmitting down-hole environmental data signals between a down-hole tool and a surface receiver. The down-hole tool is disposed within a borehole encased in an electrically conductive casing; the receiver is located at the ground surface. The tool includes a conductive upper and lower tool housing, a plurality of down-hole sensors, and a signal generating device. The ...

The present invention provides a blowout preventer in which a first set of hydraulic ports communicate with either side of a first piston coupled to a first piston rod, a second set of hydraulic ports communicate with either side of a second piston coupled to a second piston rod, and the first and second pistons and associated piston rods may be actuated independent of each other. Each piston rod is coupled to a ram, and preferably, the first piston rod is coupled to a pipe ram and the second pi...