SU1051249A1 - Deep-well sampler of non-flowthrough type - Google Patents

Abstract

Wells stagnant SAMPLER comprising filled ballast fluid receiving chamber with the separating piston, the intake valve of n thrust bushing, a ballast chamber for receiving ballast fluid, communicating with the receiving chamber throttling element piezodrive with forklapanom placed in the inlet channel of the receiving chamber, a shank and a tip mounted at the bottom of the ballast chamber, characterized in that, in order to increase the efficiency of operation and improve the operating conditions of the sampler, the put It is possible to use the chamber for receiving the ballast fluid as a receiving chamber, it is equipped with an additional separation piston, thrust sleeve and inlet valve located in the ballast chamber, the tip is hollow and has an assembly for holding the additional inlet valve in the open position and a check valve for communicating the tip cavity with the surrounding (L space).

Description

ate

N3

WITH

The invention relates to devices for sampling from boreholes deep fluid or gas samples that are under

pressure.

Reciprocating non-flowing samplers are known, consisting of receiving and ballast chambers, a force mechanism and valve devices for taking deep-seated fluid or gas samples from boreholes 1.

Also known is a downhole downstream sampler that includes a receiving chamber filled with a ballast fluid, with a separation pipe, an inlet valve and a thrust hub, a ballast chamber for receiving a ballast fluid connected to the receiving chamber by a throttling element, a piezodrive with fork, placed in the inlet channel of the receiving chamber, and a shaft and the tip mounted at the bottom of the ballast chamber. The presence of a liquid (ballast) is necessary for a smoother filling of the receiving chamber with the sampled sample while preserving its properties and representativeness 2.

A disadvantage of the known sampler is that after taking a sample of the test liquid, it is necessary to disassemble the receiving chamber with the collected sample from the ballast chamber filled with the ballast fluid. Since in this case the ballast fluid in the chamber is under pressure, before dismantling it must be removed through a special device of the ballast chamber. The preparation of the receiving chamber for operation consists in moving the separation piston up to the stop in the inlet valve bushing with the subsequent filling of the cavity of the receiving chamber with ballast fluid. After installation of the stop sleeve and the ballast chamber with the receiving chamber and the prepared piezodrive, the preparation of the sampler for work is completed. As can be seen from the above, the preparatory work is a rather lengthy and time-consuming operation and, moreover, is associated with a constant flow of ballast fluid, which is the main disadvantage of this sampler. In addition to these drawbacks, there is also such as the presence of a node that does not carry the functional load — this is the ballast chamber included in the instrument kit. All this reduces the efficiency and worsens the conditions of operation of the sampler.

The purpose of the invention is to increase the efficiency of operation and improve the operating conditions of the sampler by allowing the chamber to be used for receiving the baslide fluid as a receiving chamber.

This goal is achieved by the fact that the downhole non-flowing sampler.

comprising a receiving chamber filled with a ballast fluid with a separation valve, an inlet valve and an anvil sleeve, a ballast chamber for receiving a ballast fluid connected to the receiving chamber by a throttling element, a piezodrive with a forcalan placed in the inlet channel of the receiving chamber, a shank and a tip mounted at the bottom of the ballast cameras,

0 is provided with additional separation pores, a stop sleeve and an inlet valve placed in the ballast chamber, the tip is hollow and has an assembly for holding the additional

inlet luianaHa in the open position; and a check valve for communicating the tip cavity with the surrounding space. FIG. 1 shows the proposed sampler, general view, a section before lowering into the well (upper part); in fig. 2-

0 the same, the lower part; in fig. 3 - sampler, incision after lifting it from the well (upper part); in fig. 4 - the same, the lower part.

The sampler has a filled

2 ballast fluid receiving chamber 1 with separating piston 2, thrust sleeve 3, inlet 4 with inlet valve 5, piezodrive 6, shank 7, throttling element 8, ballast chamber 9 with additional separator 10, thrust sleeve 11, inlet 12 with inlet valve 13 and tip, 14. The shank 7 is connected to the release wire 15.

The tip 14 is made hollow and consists of a cylindrical chamber 16, on which

5 screw the valve assembly 17 with a check valve 18, protected by a lantern 19 having through holes. Inside the cylindrical chamber, an assembly is assembled consisting of a base 20, a stem 21 and a spring

0 22 and allowing the additional intake valve 13 to be held in the open position. The piezodrive 6 has preformal valve 23. The preparation of the sampler for operation is labeled as follows.

Receiving chamber 1 is flushed from oil residues, then separation partition 2 is installed into it, inlet valve 5 is mounted. Porsche 2 is displaced all the way into valve 5 (uppermost position), after which chamber 1 is filled with ballast fluid (mostly diesel fuel) and a stop sleeve 3 is mounted therein. The ballast chamber 9 is prepared in the same way as described above, only the piston 10 is moved to the position against the stop in the stop sleeve 11, and the chamber 9 is not filled with ballast fluid. A tip 14 is mounted on it, after which, by means of a throttling element 8, both chambers are connected with each other (Fig. 1). To the camera

1, a piezodrive 6 prepared for operation is fastened so that its forklapan 23 is located in the internal channel 4 of the receiving chamber 1.

The device is lowered into the well on the wire 15 with the help of the shank 7. When the estimated depth is reached, a stop is made that triggers the piezodrive and opens the inlet channel 4 and thereby the inlet valve 5. After that, around 1ts, the liquid rushes into the receiving chamber 1, transferring pressure to the surrounding air. of the medium to the separation barrier 2, the movement of which is due to the speed of flow of the ballast fluid from the receiving chamber 1 into the ballast chamber 9 through the throttling element 8. When the separating piston 2 moves to the stop sleeve 3, the further filling of the sampled sample ends and the device rises.

In the raised instrument, the shank 7 is disconnected from the wire 15, and then the piezodrive 6. Before removing the ballast chamber 9, tip 14 is rolled up from it, which is now mounted on the next receiving chamber 1 instead of piezodrive 6. This chamber becomes ball, elliptical, and the ballast is receiving, for which, instead of the tip 14, a piezodrive 6 is mounted on it.

In connection with the foregoing, there is no need for a ballast chamber, which is replaced by the next receiving chamber,

specially prepared to function as a ballast chamber. This reduces the metal consumption of the instrument kit by one quarter and the labor intensity of manufacturing by 10–15%. In addition, there is no need to expend ballast fluid and the operation itself to fill the intake chamber and remove this fluid from the ballast chamber. Thus, the time of preparatory operations will be reduced by 1520% according to approximately carried out calculations when testing a model sample. The overall efficiency of the device should be 10-15% compared with the prototype.

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Claims (1)

Borehole non-flow sampler, including a ballast-filled receiving chamber with a separation piston, an inlet valve and a thrust sleeve, a ballast chamber for receiving ballast fluid, in communication with a throttling element, a piezo actuator with a fork valve located in the inlet channel of the receiving chamber, tails in the lower part there is a ballast chamber, characterized in that, in order to increase work efficiency and improve the operating conditions of the sampler by means of the possibility of using the chamber to receive ballast liquid as a receiving chamber, it is equipped with additional dividing piston, a thrust sleeve and an inlet valve located in the ballast chamber, the tip being hollow and has a unit for holding the additional inlet valve in the open position and a check valve for communication cavity of the tip with the surrounding space.