Abstract: A method and system for injection-locking multiple optical amplifiers is disclosed. A master laser is employed to generate a continuous-wave output field. Optical modulators then produce first and second seed optical fields from the continuous-wave output field. The first and second seed optical fields provide an input to injection lock one or more optical amplifiers, optionally at different operating frequencies. Since the first and second seed optical fields are generated from the continuous-wave output field then the output fields of the optical amplifiers exhibit a high phase-coherence with each other and with the continuous-wave output field. Employing the first and second optical fields reduces the requirement to induce large frequency shifts on a single optical field. Techniques for phase-locking the output of the injection-locked laser systems are also provided to further reduce phase noise within the systems.

Abstract: A method and apparatus for mounting optical components is described. The apparatus is suitable for mounting multiple optical components and comprises a baseplate having opposing first and second surfaces. Recesses or apertures are formed within the baseplate and are located upon the first or second surfaces so as to define thermally activated optic mounting areas. Pillars are then located within the thermally activated optic mounting areas and these provide a means for attaching the optical component to the baseplate. The employment of the recesses or apertures act to significantly reduce the thermal conduction throughout the baseplate. As a result preferential heating can be provided to the one or more thermally activated optic mounting areas while maintaining the baseplate with a desired mechanical strength. The optical mounting apparatus exhibits a high thermal stability thus making the apparatus ideally suited for use within commercial optical system.

Abstract: A nozzle arrangement for use in expelling pressurized fluid includes a dead man control. The dead man control has a manually operable control part movable between a non-operating position, which prevents operation of the nozzle arrangement, and an operating position, and biased towards the non-operating position. The manually operable control part is pivotably coupled relative to a nozzle holder of the nozzle arrangement, which extends away from the pivotal coupling substantially towards a distal end of a nozzle part of the nozzle arrangement. The manually operable control part includes a handle part which in the operating position is substantially against and aligned with the nozzle part.

Abstract: The apparatus includes a housing having a dispensing location for liquid disposed above a repository for a liquid storage container. A pressurising assembly including an air pump supplies gas to pressurize the container and cause liquid to leave the container via a delivery tube. A replaceable flow assembly including a manifold 30 and a reservoir 18 conveys liquid from the delivery tube 16 to the reservoir and thence from the reservoir 18 to the dispensing location. The manifold has an underside which includes a riser tube connector 36 and a reservoir connector 40 to rigidly mount the manifold on the reservoir. An upper side of the manifold has an outlet 33 located directly above the reservoir connector 40. The manifold contains a chamber 58 configured to convey liquid from the riser tube connector 36 to the reservoir 18 and a connector 37 for feeding a second reservoir provided with a steam venting valve.

Abstract: Stop collars may be fixedly mounted on a liner or other tubular member. The stop collar comprises a first sleeve and a second sleeve. The sleeves are adapted to extend around the outer circumference of the tubular member and are engaged by threaded connections. The sleeves provide opposing inner thrust surfaces. The collar further comprises a radially expandable gripping member disposed between the opposing thrust surfaces. The sleeves may be drawn together by rotation about the threaded connection to cause the thrust surfaces to bear on the gripping member and expand the gripping member radially inward into frictional engagement with the tubular member.

Abstract: Stop collars may be fixedly mounted on a liner or other tubular member. The stop collar comprises a first sleeve and a second sleeve. The sleeves are adapted to extend around the outer circumference of the tubular member and are engaged by threaded connections. The sleeves provide opposing inner thrust surfaces. The collar further comprises a radially expandable gripping member disposed between the opposing thrust surfaces. The sleeves may be drawn together by rotation about the threaded connection to cause the thrust surfaces to bear on the gripping member and expand the gripping member radially inward into frictional engagement with the tubular member.

Abstract: The invention relates to a swivel sub for a string to be lowered into a wellbore and a method of operation in a wellbore, wherein such swivel sub is used and comprises: —a first end provided with connection means for connecting a bottom section of a string; —a second end provided with connection means for connecting an upper section of the string; —a first member, including the first end and a sleeve portion opposed to the first end; —a second member including the second end and comprising a section opposed to the second end and partially located within the sleeve portion; the first member and the second member being arranged to rotate relative to each other.

Abstract: The present disclosure relates to a down-hole swivel sub (10) for connection in a work-string between a work-string and a down-hole apparatus, the sub comprising a first substantially cylindrical body (12) with a sleeve portion (22), a second substantially cylindrical body (28) being partially located within the sleeve portion (22) and the bodies being arranged to rotate relative to each other; and a clutch (90) disposed between said first and second substantially tubular bodies.

Abstract: There is disclosed a tubing expansion device and a method of expanding tubing. In one embodiment, an expansion device (10) is disclosed which comprises at least one expansion member (14) adapted to expand a tubing (12) by inducing a hoop stress in the tubing (12), and at least one further expansion member (16) adapted to expand the tubing (12) by inducing a compressive yield of the tubing (12); and a method of expanding tubing (12) comprising the steps of expanding the tubing (12) at least in part by inducing a hoop stress in the tubing (12), and expanding the tubing (12) at least in part by inducing a compressive yield of the tubing (12).

Abstract: In an embodiment of the invention, there is disclosed a tubing expansion tool (300) comprising a body (302) adapted for rotation within tubing to be expanded, and three expansion member modules (306) each comprising an expansion member (310) rotatably mounted with respect to the body (302), each expansion member module (306) being releasably coupled to the body (302) as a unit.

Abstract: In an embodiment of the invention, there is disclosed a tubing expansion tool (300) comprising a body (302) adapted for rotation within tubing to be expanded, and three expansion member modules (306) each comprising an expansion member (310) rotatably mounted with respect to the body (302), each expansion member module (306) being releasably coupled to the body (302) as a unit.