SU785475A1 - Sampler - Google Patents

Description

(54) SAMPLIFIER

one

The invention relates to the field of field geophysical studies in wells, in particular, to instruments intended for the sampling of deep-seated fluids in wells.

Samplers are known that are classified according to the sign of filling the sample probe chamber. They are subdivided into samplers with a flow-through chamber and samplers that take a sample into the chamber without first flowing through it.

There are known samplers with a non-flowing suction-type chamber, such as the samplers V. G. Bandasarova, S. G. Toros, N.T. Ulybishcheva and others, which differ in the ways of filling the chamber with sample 1.

However, all these devices are cumbersome, difficult to manage, maintain and unreliable in operation.

Also known is a sampler that includes a housing, a sampling chamber with a sealing valve, a separating piston with a plunger and sampling means, and a piezodrive for controlling a sampler in the form of a chamber filled with working fluid and a drain chamber that communicate with each other with a hydroelectric resistance B a piston with a forklapan (2.

During the descent of the sampler into the well, the piston with the forcalan moves under the action of hydrostatic pressure upward and squeezes the working fluid through the channel with hydroresistance into the drain chamber. After a certain time has elapsed, the sampling valve opens and the well fluid is sucked in, and the suction rate is pre-selected by selecting the appropriate areas of the separation piston and plunger.

15

The disadvantage of the sampler is the complexity of the design, the difficulty of selecting the timing of opening the valve of the gattube sampler at a certain depth, and consequently the decrease in reliability of the sampler.

The purpose of the invention is to simplify the design of the sampler and (its reliability of operation. It is achieved :-) io yum, that it is equipped with a glass and remotely

a control valve installed in a channel with hydrocontraction, the cup being placed concentrically on the body with the possibility of axial movement relative to the latter and forming with it a venting chamber and a chamber filled with working fluid, and the valve for sealing the sample means is placed in the bottom of the cup.

FIG. 1 shows the scheme of the proposed borehole remote sampling with the position of the nodes before the selection of the pro0; in fig. 2 - the same, with the position of the B-B after completion of the sampling. ; The sampler contains: a housing, a remote control system consisting of a chamber 2 filled with a working liquid, a drain chamber 3 and a valve 4 blocking the channel 5 of communication between chambers 2 and 3; a sample chamber 6, a pressure transducer 7, a sealing valve 8 with a sampling device (not shown).

The housing 9 of the chamber 2 filled with the working fluid is made in the form of a cup moving relative to the body of the sampler i in the process of overflow: liquid fluid from chamber 2 to the discharge chamber 3 and back, and forms the body of the sample receiving chamber 6, the bottom of which is a valve sealing 8 with a sampling device.

The valve 4 is controlled by the electromagnet 10 by supplying control signals from a ground panel (not shown).

The sampler is lowered into the well on the cable 11 in the position shown in FIG. 1. When this valve 4 is closed, under the action of pressure forces, the sealing valve -8 is open. The pressure in chamber 3 is close to atmospheric, in chamber 2 it is close to the pressure in well Рс. With the help of the pressure transducer 7, the well pressure Pc is recorded automatically, the information about which is transmitted to the ground panel via the cable P.

When the sampler reaches the specified research interval, cable 11 sends a signal to turn on the electromagnet 10, which opens valve 4. Oil from the chamber. 2 is displaced into chamber 3, and the body 9 of the sample chamber 2 with a force F equal to:

F Pe. (D, -BtX

where D J - inner diameter of the chamber 2; D g is the outer diameter of the sampling body; it slides down, while sucking the seal through it

This fluid is well known. The speed of movement of the sampling chamber depends on the hydraulic resistance of channel 5, through which oil is displaced from chamber 2 into chamber 3. The magnitude of this resistance is controlled by varying the diameter of channel 5.

At the end of the sampling process, valves 4 and 8 are closed and the sampler takes on the appearance shown in FIG. 2, in which it rises to the surface.

To transfer the sample to the test, a container is connected to the device for taking a sample through an intermediate fitting, the sampler is attached to a vertical position, the electromagnet 10 is turned on and the valve 8 is opened and simply moving the housing 9, the chamber 6 relative to the housing 1 is forced out of the sample into the container. At the same time, oil is sucked from chamber 3 to chamber 2, and this is used to prepare the instrument for re-sampling.

Thus, the design of the body of the sample chamber in the form of a movable glass with a sealing valve with a device for sampling placed in its lower part makes it possible to simplify the design of the sampler and increase its reliability.

Claims (2)

1.Mamuna V.N., et al. Depth samplers nnh application. M., Gostoptehizdat, 1961, p. 61-69. 2. Author's Certificate of the USSR No. 467998, cl. E 21 V 49/02, 1966 (prototype). te / (Reg. 2