Abstract: A downhole apparatus for collecting solids fallback in the tubing of an oil producing borehole comprises two or more baskets to collect the solids fall back, each basket partially occupying a portion of the inner cross section of the tubing, leaving a portion of the inner cross section of the tubing having an unrestricted flow path. The baskets when considered in plan view along longitudinal axis of the tubing are distributed such that together they cover substantially the whole area of the tubing while leaving an unobstructed non-straight flowpath around the baskets.

Abstract: A well abandonment tool comprises a housing locatable within a wellbore, the housing including a compartment containing sealing material, an activator to initiate the release of the sealing material, an anchor for securing the tool in the wellbore, and a slickline for deploying the housing in the wellbore. The sealing material may be thermite, and the activator may be an ignitor that initiates the thermite reaction. The ignitor may include a battery and element, the activation process includes making a contact such that the battery causes the element to heat to ignite the thermite.

Abstract: A method of abandoning a well, where the well is at least a length of tubing, and a first annulus outside the tubing, comprising the steps of puncturing a hole or holes in the tubing, the holes in the tubing giving access to the first annulus immediately outside the tubing, heating the inside of the tubing, depositing bismuth in proximity to the region inside the tubing which is heated, such that bismuth melts, the quantity of bismuth being sufficient that a first portion of the bismuth remains in the tubing, while a second portion of bismuth flows through the holes in the tubing into the first annulus, where it flows to the non-heated section allowing the bismuth to cool and solidify to form a plug in the tubing and the annulus

Abstract: An electric submersible pump system comprises an electric submersible pump body (50) having a first mating profile (53), an electric submersible pump motor (54) having a second mating profile (55), and an electrical wet connect point (61) at the top of the electric submersible pump. The electric submersible pump body (50) has a first mating drive shaft, and the electric submersible pump motor (54) has a second mating drive shaft, such that first and second mating drive shafts engage and can transmit torque from one drive shaft to the other.

Abstract: A well abandonment tool for deployment in a well tubing, comprising an upper section, including a connector to allow the tool to be deployed on slickline or wireline a housing including a chamber containing bismuth a receiver and processor, capable of receiving a signal from the surface to actuate a permanent sealing process a lower section, including a release means capable of releasing the upper section of the tool from a lower section of the tool a tubing cup seal capable to making a seal against the inside of the well tubing to contain moltenbismuth until it solidifies a tubing bridge plug or anchor capable of securing the tool inside the well tubing the tool also including a heat source capable of melting the bismuth to a flowable state, actuated by the receiver and processor such that when the tool has been secured in the well tubing, the bismuth melting process can be initiated, and the upper housing released from the lower housing to recover the upper housing, and bismuth being melted by the heating m

Abstract: A well cutting tool, comprising a housing including a chamber, the housing having at least one nozzle, the chamber being loaded with thermite, and a gas-generating additive an ignitor such that when the ignitor is actuated to ignite the thermite, the gas-generating additive is caused to create an increase in pressure which discharges energised molten thermite from the chamber and out of the housing through the at least one nozzle.

Abstract: Sealing a well above a barrier or plug, comprising the steps of lowering a first tool on a slickline (21), comprising a plurality of cartridges (26), these cartridges including a plurality of cartridges containing a thermite material at least a first thermite initiator cartridge (70) which includes an activation receiver (73) deploying these cartridges above the barrier or plug transmitting a first wireless signal to first thermite initiator cartridge (70) such that the first thermite initiator cartridge causes a thermite reaction at the said set of the cartridges (26) containing a thermite material.

Abstract: A method of conveying materials or tools into a well, the well including a plurality of lengths of concentric tubing, comprising the step of permitting at least one cartridge to free-fall under gravity into the well. No line may be connected to the cartridge. The cartridge is selected from a group of cartridges which may comprise, a cartridge including thermite, hermetically sealed from well fluids, a cartridge including low temperature alloy, hermetically sealed from well fluids, a cartridge formed from low temperature alloy, a cartridge including a detonator triggered by impact, a cartridge including a detonator triggered by an electronic or mechanical clock, a cartridge formed from tungsten carbide, a bridge plug cartridge including slips to retain the bridge plug in a position against the wall of well tubing, a thermal barrier material, or a shock absorber that absorbs energy from subsequent cartridges being dropped.

Abstract: A downhole apparatus for collecting solids fallback in the tubing of an oil producing borehole comprises two or more baskets to collect the solids fall back, each basket partially occupying a portion of the inner cross section of the tubing, leaving a portion of the inner cross section of the tubing having an unrestricted flow path. The baskets when considered in plan view along longitudinal axis of the tubing are distributed such that together they cover substantially the whole area of the tubing while leaving an unobstructed non-straight flowpath around the baskets.

Abstract: A system of installing a telemetry cable in a drill string, the drill string comprising a plurality of drill pipe sections, the drill string having a drill pipe electrical connector at the bottom of the drill string, an electrical wireline capable of carrying an electric signal is disposed in the drill string, terminating in a lower wireline electrical connector capable of connecting with the lower drill pipe electrical connector, and an upper termination block.

Abstract: A separator for reducing or eliminating the amount of suspending solids from a reservoir fluid of a downhole motor having a rotating seal. The cleaned fluid circulated past the seal and outermost bearing, the separator having a vortex, rotating cyclone or centrifuge, at least one inlet at least one outlet for cleaned fluid, at least one outlet for solid material, water, particulates or similar material separated from the cleaned fluid. The outlet for the clean fluid may include a porous filter.

Abstract: An inclinometer subassembly for determining the inclination of a single measurement axis, the subassembly comprising: a first pair of accelerometers comprising a first accelerometer and a second accelerometer; and a second pair of accelerometers comprising a third accelerometer and a fourth accelerometer; wherein each accelerometer comprises at least one sensing axis for sensing acceleration due to gravity relative to its at least one sensing axis; wherein the first and second accelerometers of the first pair are arranged such that the at least one sensing axis of each of the first and second accelerometers is orientated in the same direction as the single measurement axis, wherein the second accelerometer is arranged in an orientation in which it has been rotated about its at least one sensing axis by 180 degrees relative to the first accelerometer; wherein the third and fourth accelerometers of the second pair are arranged such that the at least one sensing axis of each of the third and fourth accelerometer

Abstract: A drilling apparatus for drilling a lateral bore to main bore, comprises a casing in the main bore, having at least one window, at least one lateral tube, including a bit or other soil penetrator, the lateral tube which engages with an aperture in the casing, the outer diameter of lateral tube flush with aperture, such that the lateral tube is forced through the casing aperture into the formation when a sufficient pressure differential between the inside of the casing and the outside of the casing and a plurality of packers disposed at intervals along the outside of the casing, capable of sealing the annulus to the passage of fluids.

Abstract: A flush of directional drilling apparatus for directionally drilling a lateral bore from a main bore, has a casing in the main bore, the casing having at least one lateral exit port, with a fragmentable plug, flush lateral directional drilling tube, and a pre-installed whipstock guide for guiding the flush lateral directional drilling tube into the lateral exit port to drill a directional lateral hole from the lateral exit port.

Abstract: A wet connection system suitable for use in hydrocarbon wells is formed from one or more elongated, small diameter conduits which extend down the wellbore and which terminate adjacent a locating structure on the production tubing. Equipment deployed at the locating structure is connected to one or more self supporting conductors which extend down the conduits from the wellhead. Preferably the conductors are retractable and the conduits are sealingly connected to the equipment, allowing the equipment and conductors to be deployed and recovered independently of each other and to be flushed with dielectric oil pumped down the conduits after re-connection.

Abstract: A stator has a field winding, the winding comprising a plurality of axial conductors connected at their ends to form at least one circuit with a number of turns. Each axial conductor, or set of axial conductors having a common voltage, is disposed within an insulated channel member, the insulated channel member being disposed within a stack of laminations. The axial conductors and the tubular insulation members are radially distributed at equal angles.

Abstract: An electric submersible progressive cavity pump assembly is disclosed, which includes an electric motor, a progressive cavity pump, a transmission rotatable by the motor, and a torque isolator coupled between the transmission and the progressive cavity pump, where the torque isolator includes resilient members which accommodate sudden changes in torque.

Abstract: A rotor system for a downhole motor comprises a set of permanent magnets, a set of conductors and a pair of end conductor rings connecting the set of conductors. The set of permanent magnets and the set of conductors being substantially coaxial and having the substantially the same linear extent. The set of permanent magnets can be located radially inwards from the set of conductors, and may be provided by discrete conductive bars.

Abstract: A rotor system for a downhole motor includes at least one permanent magnet rotor section, and at least one squirrel cage rotor section. The permanent magnet rotor section and the squirrel cage rotor section are joined in series by a connection. In one example the connection includes a male self lock taper on one rotor, and a corresponding female self lock taper on the other rotor.

Abstract: A downhole electric submersible pump, with at least one pump unit having a pump inlet, and an electric motor system to power the pump, the electric motor system comprising an induction motor and permanent magnet motor. The induction motor and permanent magnet motor share a common power supply, connected in series.