Abstract: Systems related to threaded connections whereby off-center axial alignment of connected components is maintained. In one embodiment, threads on one connection component are timed to match the timing of the threads on the other connection component. The one component has a connection sleeve screwed thereon. Once the one component and the other component are mated in the desired axial alignment such that the threads on each joint form a continuous, unbroken thread, the connection sleeve is screwed onto the other component to form the threaded connection.

Abstract: A system of valves in which the valves operate over a designated pressure interval and are arranged to actuate performance of a sequenced set of events by downhole tools with the application of pressure to said valves.

Abstract: Cartridge-style fluid control devices are provided that are static pressure independent and capable of repeatable, reliable, particulate insensitive performance in service conditions typical of downhole intervention environments.

Abstract: Improved fluid control devices are provided for metering pressure effectively in environments that may contain solid particles and in which the ambient pressure is subject to change. Such a valve comprises a valve body containing a plunger assembly contacting a first spring, said plunger assembly having a cavity and including a second spring and a poppet assembly engaged to said second spring within said cavity; and valve seat means located in position to contact said poppet assembly and essentially prohibit flow through the valve when fluid pressure at the valve inlet is less than a predetermined differential pressure plus a fluid pressure at the valve outlet.

Abstract: A system of valves is disclosed wherein said valves operate over a designated pressure interval and are arranged to actuate performance of a sequenced set of events by downhole tools with the application of pressure to said valves.