METHOD AND DEVICE FOR SAMPLE TAKING FROM LARGE DEPTH ALONG WITH TEMPERATURE, PRESSURE AND DEPTH RECORDING DURING SAMPLE-TAKING CHAMBER FILLING WITH WELL FLUID OR GAS Russian patent published in 2006 - IPC E21B49/08 E21B47/06 G01N1/10 

FIELD: mining, particularly oil and gas well testing.

SUBSTANCE: method involves lowering sample taking device suspended to wire or logging cable to take two or more deep fluid, gas or fluid and gas mixture samples in air-tight manner simultaneously, wherein the sample taking device comprises at least two sample taking chambers; communicating well space with sample taking chamber interiors by closing or opening the chambers with the use of hydraulic drive, which is actuated since sample taking sample taking device was lowered in well, wherein lowering, lifting operations, as well as operation for sample taking device retaining at sampling point are carried out along with measurement of pressure, temperature and sample taking device location depth. The sample taking chambers are opened or closed synchronously or alternatively. Hydraulic drive is operated by electromagnetic valve under control of electronic programmable controller, which controls valve opening and closing in accordance with preset time period or well pressure value. In the case of cable communication line usage the valve is controlled by control signal given from land-based unit. Sample taking device comprises electronic module, hydraulic drive assembly, one or several sample taking chambers, temperature and pressure sensors and programmable controller, which operates electromagnetic valve of hydraulic drive assembly, magnetic collar locator, natural radioactivity recording unit. All information fixed by sensors is digitized and stored in nonvolatile memory means. Sample taking device also has sensor system, which detects sample taking chamber valves opening and closing independently for each sample taking chamber. All measured parameters are digitized and stored in electronic module memory or is supplied to land surface in the case of cable communication line usage.

EFFECT: possibility to take sealed samples simultaneously in one well point or in several points located at different depths, possibility to perform continuous depth, temperature and pressure measurements inside the well in sampling point and along well bore, provision of independent control of each sample taking chamber.

9 cl, 3 dwg