PL68308Y1 - Device for collecting fluid deposite samples from a borehole, from multiple fluid carrying layers, preferably water - Google Patents

Description

Pattern description

The object of the utility model is a device for collecting samples of reservoir fluids from many fluid-bearing layers, especially water, from a borehole, used to conduct periodic quality assessment and monitoring of reservoir fluids captured by one borehole.

The device for collecting reservoir fluid samples, known from the Japanese patent JP 2002146851, has a tubular column having a segment with a perforated wall at its lower end. The column is lowered to the depth of the layer to be tested. The perforated segment is covered at both ends with sealing units, and inside there is a fluid intake chamber, separated by tight partitions. In the chamber there is a pump connected to the extraction pipe, tightly led through the partition and ended with an outlet above ground level. Taking a sample from each fluid bearing layer requires the vertical positioning of the perforated segment at the depth defined for that layer.

Various designs of assemblies for sealing the tubular column in the borehole are also known. The assembly presented in the description of the Polish patent application P-294497 has a flexible sleeve that is radially expanded by compressed air pressure.

Also known from the patent description PL 202947 is a device for sampling fluids of the desired depth of the borehole, having a test vessel lowered on an electric line to the borehole and provided with solenoid valves, actuators and a hydraulic accumulator, a tank and an electronic control unit.

The device for collecting fluid samples from multiple fluid layers according to the present utility model - as in the above-described known solutions - has a tubular column with a segment of a perforated wall that is lowered into the borehole, and which at both ends is covered by assemblies sealing the annular space between the column pipe and drill hole. The tubular internal space of the segment is closed with tight partitions that separate the fluid intake chamber with a built-in pump connected to the extraction pipe led out above ground level. The essence of the pattern lies in the fact that the tubular column has a length that corresponds to the depth of the lowest fluid bearing layer to be tested, and that along its length it has several segments with a perforated wall, which are located at defined depths of geological fluid-bearing layers. The extraction pipes from each fluid intake chamber are sealed through the partitions of the chambers located above. In a preferred form of the design, the sealing units are made as flexible annular containers, connected in series with a compressed air system by a conduit.

The device according to the utility model allows simultaneous sampling of fluids from all fluid-bearing layers covered by one borehole, eliminating the possibility of sample falsification by admixing fluids from adjacent layers.

The utility model device for collecting water samples from several aquifers from a borehole is shown schematically in the figure.

The device has a tubular column 6 lowered into the borehole, the length of which corresponds to the depth of the lowest sampled aquifer 12. The tubular column 6 consists of segments coaxially connected to each other with a solid wall 2 and several segments with a perforated wall 3. At the lower end of the tubular column 6, there is a segment with a perforated wall 3, and above, at defined depths of occurrence of successive geological aquifers 12, further perforated segments 3 are inserted into the tubular column 6, separated from each other by segments with a solid wall 2. The segments of the perforated wall 3 are covered at both ends by sealing units 9 which are flexible annular containers connected in series with a compressed air line 10 to the above-ground installation. The pressure of compressed air causes radial closure of the annular spaces between the pipe column 6 and the borehole at the height of the aquifers 12. The internal spaces of the pipes forming the segments with a perforated wall 3 are closed at their ends by tight partitions 7, which separate the fluid intake chambers 4 in each of them. in the fluid intake chambers 4, a pump 5 is installed with a production pipe 8, which is tightly guided through partitions 7 above the located fluid intake chambers 4 and ends with an outlet above ground level.

Claims (2)

Protective Claims 1.A device for collecting samples of formation fluid from multiple layers, in particular water, from a borehole, comprising a tubular column lowered into the borehole with a perforated-wall segment covered at both ends by assemblies sealing the annular space between the pipe column and the borehole, while the tubular internal space of the segment with a perforated wall is closed with airtight partitions that separate a fluid intake chamber with a pump built in it connected to a mining pipe ending with an outlet above ground level, characterized in that the tubular column (6) has a length corresponding to the lowest depth tested of the liquid-bearing layer (12), and that along its length it has several segments with a perforated wall (3), located at defined depths of geological liquid-bearing layers (12), and the extraction pipes (8) from each fluid intake chamber (4) are tight carried out by Prov partitions (7) located above the chambers (4). 2. The device according to claim The method of claim 1, characterized in that the sealing units (9) are flexible annular containers, connected in series with the compressed air installation (10) by a conduit.