Abstract: A pump is disclosed which has a housing with a upper end and a lower end. A conduit is defined through the housing between the upper and the lower ends. The pump includes an impeller within the housing, an inlet from the conduit to the impeller and an outlet from the impeller. Portions of the impeller may be distributed around the conduit. The pump may also include a motor coupled to the impeller. Portions of motor may also be distributed around the conduit. The outlet from the impeller may be independent of the conduit.

Abstract: A top sub of a clutch swivel for connection to a production well tubing string is movable between an engaged position and a disengaged position relative to a mandrel. The engaged position allows an anchor to be set in a well casing by rotating the tubing string. Tension can be applied to the tubing string to move the top sub to the disengaged position, allowing the tubing string to be rotated without rotating the mandrel. The anchor can be moved to a different position, without pulling the tubing string to the surface, by removing tension from the tubing string to move the top sub from the disengaged position to the engaged position, rotating the tubing string in an opposite direction to release the anchor, and resetting the anchor by again rotating the tubing string. The top sub may also include a sealed internal volume of the swivel remains constant are.

Abstract: An apparatus and method for separating components of a fluid containing liquid and gas comprises a housing having at least one elongate channel. Each channel has an inlet end, an outlet end and rounded walls enabling the fluid flowing through the channel to flow substantially free of turbulent flow. Each channel defines a spiral path through the housing and acts to separate the fluid flowing through the channel into a gas-depleted outer portion and a liquid-depleted inner portion. The apparatus includes a liquid outlet port for the gas-depleted outer portion and a gas outlet port for the liquid-depleted inner portion. The housing may include a mixing chamber in fluid communication with the inlet end of the channel. The mixing chamber may include a surface the fluid impacts against. The apparatus may include a chamber at the outlet end of the channel. The chamber may have a gas outlet port closer to the outlet end of the channel than the liquid outlet port.

Abstract: A pump is disclosed which has a housing with a upper end and a lower end. A conduit is defined through the housing between the upper and the lower ends. The pump includes an impeller within the housing, an inlet from the conduit to the impeller and an outlet from the impeller. Portions of the impeller may be distributed around the conduit. The pump may also include a motor coupled to the impeller. Portions of motor may also be distributed around the conduit. The outlet from the impeller may be independent of the conduit.

Abstract: A well tool for applying a pulling or a pushing force to an object in an interior of a well bore comprising: a) an inner member comprising a first elongated member, a second elongated member and an actuation means axially interconnecting the first elongated member and the second elongated member; b) an outer elongated member longitudinally moveably engaged with the inner member; c) a first seal defined between the first elongated member and the outer elongated member; d) a second seal defined between the second elongated member and the outer elongated member; e) a first piston area defined at a first end portion of the outer elongated member between an outer diameter of the outer elongated member and a sealed outer diameter of the first elongated member; f) a second piston area defined at a second end portion of the outer elongated member between the outer diameter of the outer elongated member and a sealed outer diameter of the second elongated member; and g) a sealed chamber defined between the first seal a

Abstract: A pump is disclosed which has a housing with a upper end and a lower end. A conduit is defined through the housing between the upper and the lower ends. The pump includes an impeller within the housing, an inlet from the conduit to the impeller and an outlet from the impeller. Portions of the impeller may be distributed around the conduit. The pump may also include a motor coupled to the impeller. Portions of motor may also be distributed around the conduit. The outlet from the impeller may be independent of the conduit.

Abstract: A well tool for applying a pulling or a pushing force to an object in an interior of a well bore comprising: a) a inner member comprising an first elongated member, a second elongated member and an actuation means axially interconnecting the first elongated member and the second elongated member; b) an outer elongated member longitudinally moveably engaged with the inner member; c) a first seal defined between the first elongated member and the outer elongated member; d) a second seal defined between the second elongated member and the outer elongated member; e) a first piston area defined at a first end portion of the outer elongated member between an outer diameter of the outer elongated member and a sealed outer diameter of the first elongated member; f) a second piston area defined at a second end portion of the outer elongated member between the outer diameter of the outer elongated member and a sealed outer diameter of the second elongated member; and g) a sealed chamber defined between the first seal a

Abstract: A top sub for connection to a production well tubing string is movable between an engaged position and a disengaged position relative to a mandrel. The engaged position allows an anchor to be set in a well casing by rotating the tubing string. Tension can be applied to the tubing string to move the top sub to the disengaged position, allowing the tubing string to be rotated without rotating the mandrel. The anchor can be moved to a different position, without pulling the tubing string to the surface, by removing tension from the tubing string to move the top sub from the disengaged position to the engaged position, rotating the tubing string in an opposite direction to release the anchor, and resetting the anchor by again rotating the tubing string. Embodiments in which a sealed internal volume of the swivel remains constant are also disclosed.

Abstract: A well tool for applying a pulling or a pushing force to an object in an interior of a well bore comprising: a) an inner member comprising a first elongated member, a second elongated member and an actuation means axially interconnecting the first elongated member and the second elongated member; b) an outer elongated member longitudinally moveably engaged with the inner member; c) a first seal defined between the first elongated member and the outer elongated member, d) a second seal defined between the second elongated member and the outer elongated member; e) a first piston area defined at a first end portion of the outer elongated member between an outer diameter of the outer elongated member and a sealed outer diameter of the first elongated member, f) a second piston area defined at a second end portion of the outer elongated member between the outer diameter of the outer elongated member and a sealed outer diameter of the second elongated member, and g) a sealed chamber defined between the first seal a