Abstract: A concentric wet connector system useful for connecting, disconnecting and reconnecting small diameter fluid lines (40, 42, 44) and electrical lines (46) downhole in oil and gas wells, the system comprising first and second slidably engageable well tubulars (32, 38) coaxially disposed around a longitudinal bore, each well tubular having a circumferentially extending wall section containing at least one auxiliary conduit leading to a connector port 64 paired and communicating with a connector port 66 of the other tubular. The connector ports in each well tubular are preferably spaced apart both circumferentially and longitudinally.

Abstract: Improved methods and systems for creating a multilateral well and improved multilateral well structures.

Abstract: A portable sonic testing device for the testing of waxy and emulsified fluids, utilizing variations in sound wave propogation, light propogation, and changes in electrical resistance in the liquid, all over a range of temperatures and chemical treatment conditions. The patent also discloses equations used to derive additional information from the output of the device.

Abstract: An improved mechanical system selectively locks the tester valve of an annulus pressure responsive tester valve in position for an indeterminate number of well annulus pressure cycles. The tester valve can be closed upon demand. The forces which accomplish opening of the ball valve act across a power piston, but the forces which close the valve act across an actuating piston. The tester valve can be run into a well with an operating element of the tester valve in a first position, such as a closed position. Upon reaching the desired depth within the well and setting of an associated packer system, well annulus pressure is then increased to a first level above hydrostatic pressure to move the power piston and thus move the tester valve to an open position. During a normal mode of operation, well annulus pressure can be cycled between hydrostatic pressure and the first level to open and close the tester valve.