Abstract: A split hub assembly including a split sprocket, a split hub, and members to connect the split sprocket together. The formed split sprocket is disposed over the split hub by complementarily tapered surfaces to maintain the split hub coupled together. Installation and removal of the present invention is significantly easier than standard prior art devices, plus it provides interchangeability of hubs and sprockets.

Abstract: Method and apparatus for sinking pipes (8) or cables into a pilot borehole (4) by use of a drill string (3) including an expansion drill bit driven to rotate and pull is disclosed. The expansion drill bit is supplied with a wash fluid and is coupled with the pipe or cable (10) to be sunk into the borehole. The pulling force between the expansion drill bit (5) and the pipe or cable is continuously measured and the measurement values are transmitted to a drive for the drill string in real time. The advance speed and/or the advance force and/or the rotational speed and/or the torque and/or the wash fluid quantity and/or the wash fluid viscosity are adjusted as a function of the measurement values to be within predetermined values determined by the load capacity of the pipe (8) or cable.

Abstract: A screen provides increased erosion resistance and collapse resistance without uneconomical overcompensation and without requiring an increase in the screen's outer diameter. In a preferred embodiment, a sand control screen has a support material radially between a tubular base pipe and a filtering portion. The support material radially outwardly supports the filtering portion to help prevent radially inward collapse of the filtering portion. In another preferred embodiment, a screen has a coating applied to a filtering portion's exterior surface. The coating may alternatively or combinatively provide erosion resistance, radially inwardly retain a support material, and selectively vary flow through the filtering portion.

Abstract: A drainfield pipe having a rib radially extending from its wall is supported by a device which includes a pair of elongated anchor members generally parallel to each other and separated for receiving the drainfield pipe therebetween and suspending the pipe from its rib. The elongated anchor members penetrate a grade surface for holding the anchor members upright while supporting the pipe rib within a clamp above the grade surface. The clamp is attached to the anchor member upper portion and holds the rib between clamp jaws. Installing drainfield pipe by supporting the pipe from the radially extending rib permits the pipe to be held at desired positions for introduction of aggregate into an absorption area containing the drainfield pipe without displacing the connected pipe their desired location. With the rib positioned upward and away from the drainfield surface, the support devices holding the pipe are removed after aggregate is placed within the drainfield and around the pipe without displacing the pipe.

Abstract: A system and method for sensing and determining operating features of coiled tubing (14) that is run in and out of a borehole. The coiled tubing (14) is stored on a reel (10) mounted on a reel frame (13) for transport from one job site to another. A reel database (22) is secured to the reel frame (13) at the first job site for the coiled tubing (14) and remains on the reel frame (13) for transport with the coiled tubing (14) for the entire life of the coiled tubing (14). The system provides for updating of the reel database (22) from sensor interface modules (SIMS 30B-30G) for predetermined operating characteristics of the coiled tubing (14) during operations. The system provides that data from the reel database (22) may be retrieved at a new job site to provide an accurate and current history of the predetermined characteristics of the coiled tubing (14).

Abstract: A downhole tool apparatus (34) including a housing (42) adapted to be connected in a pipe string (30), the housing (42) having a generally cylindrical bore (44) defined therein, an operating assembly (112) disposed within the cylindrical bore (44) of the housing (42) having open and closed positions and a mandrel (142) slidably received in the cylindrical bore (44) of the housing (42) and adapted to be selectively telescoped between first and second axial positions relative to the housing (42) to manipulate the operating assembly (112) and selectively rotated between first and second circumferential positions relative to the housing (42) to selectively lock the mandrel (142) in an axial position relative to the housing (42).

Abstract: Method and apparatus for testing and sampling open-hole oil and gas wells. The apparatus includes a packer, a surge chamber, a closure valve which may be opened to flow fluid into the surge chamber, and a sampler. The surge chamber may be one of a pair of surge chambers, and the closure valve may be one of a pair of closure valves so that two surges may be carried out prior to obtaining a fluid sample in the sampler. In operation, the packer is placed in a set position by setting down weight. The closure valves are also actuated when weight is set down. The first closure valve has a first predetermined time delay before opening so that the packer may be set, and the second closure valve has a second predetermined time delay so that the packer may be set and the first closure valve opened before a fluid sample is captured. By opening a vent tool at an upper end of the uppermost surge chamber, formation fluid may be forced back into the formation or zone of interest by a bull-heading operation.

Abstract: This invention relates to a friction rock stabilizer which includes an elongated tendon tube which is reduced in cross-sectional dimension over a portion of its length towards one end of the tube, a slot which extends over at least the unreduced length of the tube and a radially extending stop which is located on the reduced dimension portion of the tube for supporting a face washer on the stabilizer. Preferably, the reduced cross-sectional length of the tube is parallel sided and is conveniently circular in cross-section.

Abstract: A machine for cutting a length of pipe has a body with cross-sectional dimensions which are less than the inner diameter of the pipe to be cut. The machine has a plurality of legs which extend radially from the body such that the machine can be fitted within a length of pipe and locked in position by moving the legs radially outward. The machine further has a rotating tool for cutting the inner wall of the length of pipe.

Abstract: A system for selective production from, and stimulation of, subterranean production zones while improving productivity and enhancing control of the well. Portions of a production tubing string and an internal stimulation/shifter string are assembled and run together as completion segments. Consecutive completion segments, with each segment including packers that surround sleeves and terminate at the upper end in a well control valve, are run into the cased wellbore so that the acid flow ports operated by sleeve valve assemblies are placed proximate the perforations of prospective production zones. The production zones are then stimulated as the stimulation/shifter string is moved progressively outward placing acid at each consecutive zone. The stimulation/shifter string is then removed from the production tubing string, mechanically closing the well control valve assembly by tubing manipulation.

Abstract: Hydrocarbons trapped in solid media, such as bitumen in tar sands may be recovered from deep formations by relieving the stress of the overburden and causing the formation to flow from an injection well to a production well, for example, by fluid injection, recovering a tar sand/water mixture from the production well, separating the bitumen and reinjecting the remaining sand in a water slurry.

Abstract: The invention relates to a pulley, in particular for a continuously variable transmission, provided with two sheaves on a pulley shaft, the sheaves being non-rotationally fixable on the pulley shaft, and at least one sheave being axially movable relative to the pulley shaft by means of movement means.According to the invention, the movable sheave is placed on the pulley shaft in such a way that, if the movement means impose a stable position on the sheave, the sheave is fixed axially relative to the pulley shaft and that, if the movement means impose a change in the axial position of the sheave, the sheave is movable in the axial direction and/or in the direction of rotation relative to the pulley shaft.

Abstract: A drill rod suitable for a hydraulic drilling apparatus, at the drilling end (I) of which there is a drilling device (1), that includes at least drilling equipment (2) and hammering equipment (5) as well as preferably flushing equipment (10) also, to drill a hole by use of the drilling equipment (2) by a feeding motion along the longitudinal axis (s) of the drilling device (1) and by a rotational motion (w) around the longitudinal axis (s) as well as by a to-and-from or a like hammering motion (t). The drilling device (1) has jointing equipment (3) for fastening of a drill rod (4) preferably in a removable way to increase the drilling depth of the drilling apparatus.

Abstract: A primarily electronically set permanent or retrievable downhole tool having a hydraulic contingency arrangement to activate the downhole tool in the conventional way in the event electronic communication fails.

Abstract: An apparatus for protecting blowout preventers during well fracturing and/or stimulation treatments is disclosed. The apparatus includes a hollow spool with spaced-apart inner and outer sidewalls that define an annular cavity. A mandrel is forcibly reciprocatable in the cavity. The mandrel includes an annular seal at a bottom end for sealingly engaging a bit guide attached to a top end of the casing. The apparatus is mounted above a BOP attached to a casing spool of the well before well stimulation procedures are begun. The mandrel is stroked down through the BOP to protect it from exposure to fluid pressure as well as abrasive and/or corrosive well stimulation fluids, especially extreme pressures and abrasive proppants. The advantage is a simple, easy to operate apparatus for protecting BOPs which provides full access to the well casing with well servicing tools to facilitate well stimulation at pressures approaching the burst pressure rating of the well casing.

Abstract: A bore hole support system is formed from a flexible liner that is readily everted within a bore hole and forms a bore hole support system to install a casing in the bore hole while supporting the bore hole walls. After a pilot hole is drilled, the pilot hole is traversed with a reamer to form the pilot hole diameter to a larger diameter for the final bore hole. The flexible liner with the attached casing is everted and pressurized behind the reamer as the reamer traverses the pilot hole to support walls defining the bore hole while pulling the casing into the bore hole. The liner is simply removed from a storage and everting canister and remains with the casing in the bore hole. In certain circumstances, the liner may be coated with a water soluble material so that the casing may be in fluid communication with the bore hole walls when the coating has dissolved.

Abstract: A bicycle front derailleur with a cam level for smoother gear switching is disclosed. The bicycle derailleur is operated by pulling a wire which shifts a chain between at least a large sprocket, a medium sprocket and a small sprocket. The bicycle front derailleur contains a cam lever which is pivotably connected to a four-linkage chain guide moving system at a pivoting point for pulling the chain guide moving system, and thus shifting the chain, when a cable is pulled in a pulling direction. The cam lever has a cam groove formed on the peripheral surface of the cam lever for receiving the wire. The cam lever is structured such that the radial distance between the cam groove and the pivoting point increases in a direction opposite of the pulling direction, so as to provide a greater effective length vertical to the pulling direction when the wire is subject to a greater linear displacement resulting in a greater counterforce.

Abstract: The present invention relates to a semiconductor fabricating apparatus having an electrical system for transmitting a rotatory power through a belt of a motor to a pulley. The semiconductor fabricating apparatus having an electrical system of the present invention includes a sensor disposed in the vicinity of the belt for detecting a distance between the sensor and the belt and generating an electrical signal corresponding to a detected distance; an amplifier for amplifying the electrical signal to generate an amplified voltage; an analog-to-digital converter for converting the amplified voltage into a digital signal; and a controller for comparing the digital signal with a reference signal and determining whether the belt is loose on the pulley so as to generate a control signal.

Abstract: A chain and sprocket system includes a plurality of chains and phased or offset sprockets. The transmission system includes a random or hybrid chain with the offset sprockets. The timing system can include single or dual overhead camshafts, with phasing of the crankshaft sprockets and camshaft sprockets.

Abstract: A vibration damper assembly operatively connecting a driving pulley with an automotive engine output shaft which drives a serpentine belt system with an automatic belt tensioner. The vibration damper assembly serves to dampen torsional, bending, and transitional vibrations transmitted from the output shaft through the poly-V belt and engine frame to the belt tensioner. The vibration damper assembly .?.comprises.!. .Iadd.includes .Iaddend.a mounting element, fixed to the output shaft, in torsional transmitting relation therewith, bearing member operatively disposed between the driving pulley and the mounting element to restrict relative movement therebetween to torsional relative movement, and a resilient member operatively connected between the driving pulley and the mounting element in resilient torsional transmitting relation therebetween.