Device for sampling under-ice reservoirs


G01N1/10 - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (separating components of materials in general B01D, B01J, B03, B07; apparatus fully provided for in a single other subclass, see the relevant subclass, e.g. B01L; measuring or testing processes other than immunoassay, involving enzymes or micro-organisms C12M, C12Q; investigation of foundation soil in situE02D0001000000; monitoring or diagnostic devices for exhaust-gas treatment apparatus F01N0011000000; sensing humidity changes for compensating measurements of other variables or for compensating readings of instruments for variations in humidity, seeG01D; or the relevant subclass for the variable measuredtesting or determining the properties of structures G01M; measuring or investigating electric or magnetic properties of materials G01R; systems in general for determining distance, velocity or presence by use of propagation effects, e.g. Doppler effect, propagation time, of reflected or reradiated radio waves, analogous arrangements using other waves G01S; determining sensitivity, graininess, or density of photographic materials G03C0005020000; testing component parts of nuclear reactors G21C0017000000)
G01N1/02 - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (separating components of materials in general B01D, B01J, B03, B07; apparatus fully provided for in a single other subclass, see the relevant subclass, e.g. B01L; measuring or testing processes other than immunoassay, involving enzymes or micro-organisms C12M, C12Q; investigation of foundation soil in situE02D0001000000; monitoring or diagnostic devices for exhaust-gas treatment apparatus F01N0011000000; sensing humidity changes for compensating measurements of other variables or for compensating readings of instruments for variations in humidity, seeG01D; or the relevant subclass for the variable measuredtesting or determining the properties of structures G01M; measuring or investigating electric or magnetic properties of materials G01R; systems in general for determining distance, velocity or presence by use of propagation effects, e.g. Doppler effect, propagation time, of reflected or reradiated radio waves, analogous arrangements using other waves G01S; determining sensitivity, graininess, or density of photographic materials G03C0005020000; testing component parts of nuclear reactors G21C0017000000)

FIELD: investigating or analyzing materials.

SUBSTANCE: device has cylindrical housing, heater, clamp, pump for pumping water to be investigated, and valve for insulation of the sample from ambient water. The device is provided with a unit which has an assembly of cells with microbiological filters connected in parallel. The diameters of the cells are different. The device has additional heater mounted in the top part of the housing and additional valve. The cell assembly is interposed between the valves.

EFFECT: enhanced reliability of sampling.

1 dwg

 

The invention relates to the drilling and testing wells in ice for microbiological, geochemical, and other types of wells in the ice and ice water.

A device copyright certificate №1488717, G 01 N 1/10, publ. BI No. 23, 1989, "a Device for sampling liquid samples from ice arrays", to obtain samples of ice for subsequent microbiological analysis and other types of research that require sterility of the sampling process.

The device consists of nodes: sampling, silt, heaters, sealing, control unit. A disadvantage of this device is the design complexity and the possibility of contamination of ice reservoirs by other organisms.

It is also known device, adopted as a prototype for the patent of the Russian Federation No. 2182225, G 01 N 1/02, publ. 2002, "Thermorunaway the sampler, for sampling ice and water during drilling in the ice cover, as well as for aseptic dissection of ice water, followed by reliable isolation from upstream of the wellbore filled with priming fluid.

Thermorunaway the sampler, the body of which is a thick-walled pipe is connected with the ground remote control load-carrying cable. Operating and control wires carrying cable is connected to the electronic control unit. System sensor is s and the electronic unit needs and the technology of sampling, constant monitoring of the process of sampling in the well and the possibility of rapid intervention with ground control is the process of sampling. After drilling the hole in the ice is thicker for drilling the remaining portion to contact with the surface of the subglacial lake, on the borehole bottom falls thermorunaway the sampler on the load-carrying cable. When drilling the lower surface of Termoli and the tapered surface of thermal crown is in constant contact with icy face. When TERMOIL will reach the lake surface will react with a contact sensor. The signal is then fed to the control panel and from there the command is given to turn off the power of the crown and stop the drilling process. At the same time using special readings of the sensors is measured the pressure difference between the column of priming fluid in the well and the water in the lake. If the pressure of the priming fluid is less than or equal to the pressure of the water in the lake, the water level in the borehole at a predetermined height rise of the sampler.

If the fluid pressure in the well is above the pressure in the lake, a number of measures for bringing existing conditions to required, and the process of bringing controlled by the operator by means provided for this purpose sensors. After the excess pressure in Oze the e above the pressure in the bore of the sampler is raised to a certain height, and at the same time lake water rises in the well. Then in the well cease for the period of freezing rising in the well water of the lake. Then take a sample of ice formed from the water of the lake Electromechanical drill. The rest of the ice is not drilled that provides complete isolation of the wellbore from the surface of the lake and thereby eliminates the danger of contamination.

The disadvantage of this device is the design complexity of the sampler, and unreliable technology sampling, as well as the low quality of the selected sample, as the sample is taken from the water prior to filling the lower horizons of the wells, where it is frozen.

The technical result is to eliminate these drawbacks, i.e. increase the reliability of the device and improving the quality take samples directly from the subglacial lake.

The technical result is achieved in that the device for sampling, comprising a cylindrical casing, a heater, cable lock for attachment to the load-carrying cable, a pump for pumping the water valve for the isolation of selected samples from the environment, according to the invention is equipped with a block containing a set of parallel-connected cassettes microbiological filters, and the diameters of the different cassettes and increases the tsya to the bottom of the block, additional heater located in the upper part of the body and an additional valve, and a block of cassettes is placed between the two valves.

This increases the quality of the selected sample and the volume of the investigated ice water.

Device for sampling of subglacial water bodies is illustrated by a drawing, which shows a longitudinal section of the device.

The device comprises: a cylindrical housing 1 in which are mounted the bottom 2 and top 3 heaters, load-carrying cable 4 to perform tripping, cable lock 5 for fastening the device on the carrying cable 4, a block connectors 6, block 7, containing a set of parallel-connected 8 cassettes, each of them is a microbiological filter 9 (for example:polycarbonate filter to 0.23 μm), two of the electromagnetic valve 10 for isolation of the studied samples from the environment and the pump 11 for pumping the investigated water through the block 7. Pipe 12 serves for pouring filtered water into the lake.

The device operates as follows. After drilling the borehole through the ice thickness and the opening of the bore ice reservoir drilling string is removed from the well. Some of the water rises in the well to equalization of pressures in the reservoir and post pour the liquid in the well. Then through the quainoo in the studied reservoir falls device for sampling with a pre-sterilized filter unit to a predetermined depth, by means of the carrying cable 4. As for the time of tripping the water rising in the well, may zamerznut on the walls of the borehole, the device is lowered with the included lower heater 2. At a given depth open electromagnetic valves 10, and includes a pump 11, which pumps the investigated water through the block 7. When this water is pumped through the cartridge filters block in parallel, making the total area of the filter with a relatively small diameter of the sampler allows to significantly increase the volume of the analyzed sample. The filtered water through the tube 12 falls back into the lake. At the end of the process of sampling the electromagnetic valve 10 is closed, switch off the pump 11, and the device is then removed from the wells. When lifting devices include upper heater 3, which calibrates the well in case of freezing of water that rose up from the ice reservoir in the lower part of the well. After removal of the device from the well of him taken out unit 7, together with the solenoid valves 10, in the closed position) and sent for study by specialists.

As a result, when the device is in compliance with all conditions to ensure sterile sampling and preservation of the unique relic system subglacial lake in its original form.

At trojstvo for sampling of subglacial water bodies, comprising a cylindrical casing, a heater, cable lock for attachment to the load-carrying cable, a pump for pumping the investigated water valve for isolation of selected samples from the environment, characterized in that it is provided with a block containing a set of parallel-connected cassettes microbiological filters, and the diameters of the different cassettes and increase towards the bottom of the unit, additional heater, located in the upper part of the housing, and an additional valve, and a block of cassettes is placed between the two valves.



 

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