SU900156A1 - Sampler - Google Patents

Description

(54) SAMPLIFIER

one

The invention relates to devices for sampling liquid and gas and can be applied in various sectors of the national economy to obtain the representative robots required for analysis, in particular for gas metering of boreholes from drilling mud.

A device for sampling liquids is known, comprising a cylindrical body in which pistons are mounted, connected by a rod and a spring, with the possibility of adjusting an inter-piston space, and a bypass tube with a valve 1.

However, the known device provides discrete time-uneven sampling.

A liquid and gas sampler is known, including a housing with a pipe for injecting a sample, a spring-loaded piston with a rod, and a receiving and working chamber connected by channel 2..

The disadvantages of the known sampler are discrete sampling into the receiving chamber under the action of a fast spring response, the uneven filling rate of the receiving chamber and the inability to control the duration of the selection. As a result, the sampled samples are not representative, since they do not characterize the average composition of the selected medium, which is especially affected when sampling from the stream.

The purpose of the invention is to increase the representativeness of the sample.

The goal is achieved by the fact that in a liquid and gas sampler, comprising a housing with a pipe for injecting a sample, a spring-loaded piston with a rod,

10, the receiving and working chambers connected by a channel, the working chamber is filled with liquid and equipped with an additional Piston mounted on the rod, and the casing is equipped with a throttling device installed between the chambers 15 with a shut-off valve and a bypass valve located in the channel.

The drawing shows the sampler in the position of sampling, General view.

The sampler includes a housing 1c with a nozzle 2 for injecting a sample to be taken, a receiving chamber 3, a piston 4 with a rod 5 and. the spring 6 is compressed and communicating with the housing I, the working chamber 7, in which the interacting with the rod is installed

5 piston 8, bypass and shut-off valves 9 and 10, a throttling device in the form of a hollow plunger 11 with an axial bore and a spring 12, forming a fluid flow regulator filling the working chamber 7, and throttles 13. The bypass valve 9 provides the flow of fluid from working chamber 7 into the cavity of housing 1, and the shut-off valve 10 - the inclusion of the sampler.

Before the start of sampling, the piston 4 is located near the nozzle 2 in the extreme position. When this bypass 9 and shut-off 10 valves are closed. After sampling the piston 8 transmit additional force through the hole 14.

The sampler works as follows.

The nozzle 2 communicates with the medium being withdrawn, for example with the flow of drilling fluid leaving the well, and opens the shut-off valve 10. Under the force of the compressed spring 6, the rod 5 moves in the direction of the deformation of the spring 6. At the same time, the piston 4 displaces the buffer fluid A sample is taken from the flow of the drilling fluid into the working chamber 7 through the throttle 13, and the receiving chamber 3 enters the receiving chamber 3. The sampling is carried out for a certain period of time, determined by the duration of throttling of the buffer fluid in the working chamber 7.

Ensuring uniform filling of the receiving chamber 3, the breakdown is achieved by using the buffer flow controller of the fluid in which the plunger 11 moves as the springs 6 and 12 expand, increasing the cross section of the input of the buffer fluid into the throttle 13. After filling the receiving chamber 3, shut off the valve 10 and open bypass valve 9. Then connect the nozzle 2 to the device d, l analysis of sampling (not shown) and transmit the mechanical force generated. For example, with the help of a screw device through the piston 8 to the piston 4, which at the same time moves the initial position. As a result, the sample is displaced and the spring 6 is compressed.

To fix the piston 4 in the initial position, the overflow valve 9 is closed, thereby excluding the flow of buffer fluid into the working chamber 7. Thus, the sampler is prepared for re-sampling.

By increasing the sampling time, averaging over the sampling time the concentrations of substances contained in the medium selected and

representative filling of the receiving chamber with liquid is ensured. As a result of the selection of representative samples, the accuracy and unambiguity of the gasometric research increases; 5 Research institutes of wells and in general - reliability and efficiency of exploration for oil and gas. The invention can be used to carry out field work on the gas metering of wells in order to directly search for oil and gas deposits.

The economic effect of using the invention is achieved due to the reduction of three times the volume of chemical and analytical studies of samples of the washing liquid. selected from a large interval of well penetration (15 meters) instead of discrete samples that are currently selected for gas metering of wells from the interval of penetration, paBHord 5 meters.

With an average cost of sampling and chemical analysis of one sample of flushing fluid, equal to 5 rubles, from the penetration interval of 5 running meters. m and the annual volume of testing geochemical wells in the USSR about 500 thousand pog. The expected economic effect of a threefold reduction in the volume of sampling and analytical studies of samples will be about 340 thousand rubles. in year.

The estimated need for samplers only for gas metering of geochemical wells is 250-300 devices per year.

Claims (2)

Invention Formula A liquid and gas sampler, comprising a housing with a sample inlet, a spring-loaded bristle plate, receiving and working chambers connected by a channel, characterized in that, in order to increase the representativeness of the sample, the working chamber is filled with liquid and provided with an additional screw mounted on the rod, and the housing is provided with a throttling device installed between the chambers with a shut-off valve and a by-pass valve located in the channel. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 150702, cl. G 01 N 1/14. 2. USSR author's certificate No. 296019, cl. G 01 N 1/10, 1968.