Abstract: An adjustable lifting sling including a stationary support with hanger means, one or more cam surfaces pivotally mounted to the support, a ratable locking arm having one or more corresponding complementary shaped surfaces to allow a tensile lifting member to be controllably locked between the cam and complementary shaped surfaces.

Abstract: Protective headgear comprises a rigid shell with face pads which may be released and removed while the headgear is still on a person's head. A protective chin guard may be attached to the headgear by way of the face pads. The chin guard comprises a substantially rigid shell with a removeable insert made of a flexible bladder filled with a shock absorbing fluid. The headgear may comprise a shell made of an inner and outer material layered over an internal foam core to effect both strength and lightweight.

Abstract: Protective headgear comprises a rigid shell with face pads which may be released and removed while the headgear is still on a person's head. A protective chin guard may be attached to the headgear by way of the face pads. The chin guard comprises a substantially rigid shell with a removeable insert made of a flexible bladder filled with a shock absorbing fluid. The headgear may comprise a shell made of an inner and outer material layered over an internal foam core to effect both strength and lightweight.

Abstract: Hydrocarbons are produced from a well having a bottomhole and a wellhead and communicating with a formation, by producing a flow of hydrocarbon-containing formation fluid from the formation at the bottomhole of the well, transforming the flow of the formation fluid from the formation at the location of transformation into a finely-dispersed gas-liquid flow with a liberated gas forming a part of the gas-liquid flow, so that a column of the formation fluid is formed in the well from the depth of the formation to the location of transformation, and a column of the finely-dispersed gas-liquid flow with a liberated gas is formed in the well between the location of the transformation and the wellhead, and automatically maintaining a pressure of the formation fluid at the bottomhole in the well higher than saturation pressure, substantially independently from changes in properties of formation and formation fluid.