To the dropping incident of instrument for steel wire rupture or man-made destroy in well testing operation, a new model of electronic throwing in apparatus for down hole instrument is developed whose structure is simple, maintenance is convenient and which can drop testing instrument at any section to test with fixed time and depth.

We need a logging system which can join a variety of downhole tools together to do such jobs as completion well, cement bond and perforation coring based on geological characters in Nanxiang basin.

The tractor for horizontal well logging is a kind of tool to convey the downhole tools in the horizontal well logging.

We develop a zonal pressure measuring technique in two reservoir commingled producing well aiming to solve the problem that we could not measure that before,and integrally design downhole instruments and tools combining the specific lifting mandrel in two reservoir commingled producing well.

This kind of memory array may also be applied to other down-hole electronic logging instrument.