SU1596103A1 - Sampler - Google Patents

Abstract

The invention relates to the mining industry and can be used in sampling liquids from oil and gas condensate wells. The goal is to increase the reliability of operation by eliminating the possibility of premature actuation of the spool valve actuator. The sampler contains a differential rod / LH / 1, the upper part of which is made in the form of a spool valve that overlaps the inlet channel 2 of the working chamber / RK / 16. Hydro relay piston 5 is rigidly attached to LH 1, and an adjustable check valve / POK / 7 is located inside the piston 5 Before descending into the well, the spring force of the ROCK 7 is adjusted. When the relay depth is reached, LH 1 moves downwards. Fluid from the piston cavity 15 of the hydrorelay is displaced through the ROK 7 and hydroresistance 13 into the piston cavity 14. The slide valve opens the inlet channel 2 and reports it through the non-return valve 4 with the piston cavity 20 PK16. The reservoir fluid fills RC 16, and the separation piston 17 displaces the ballast fluid through the hydroresistance 19 into the ballast chamber 18. 1 sludge.

Description

The invention relates to the mining industry and can find application in the sampling of liquids from oil and gas condensate wells. The goal is to improve the reliability of Lutem exceptions.

Opportunities for directing and re-eming and 11 og o the actuation of a spool valve actuator. The sampler contains a differential rod (LH) 1, the upper part of which is made in the form of a spool valve that overlaps the inlet channel 2 of the working chamber (RK) 16. To LH! The piston 5 of the hydrorelay is rigidly attached, and inside the piston 5 an adjustable check valve (ROCK) 7 is located. Before descending into the well, the spring force of the ROCK 7 is adjusted. When the relay depth of LH 1 is reached, it moves downwards. The liquid from the underperfaction cavity 15 of the retractor is displaced through the ROCK 7 and the hydraulic resistance 13 into the over piston cavity 14. The slide valve opens the inlet channel 2 and informs it through the check valve 4 with the underdraft cavity 20 of the RC 16. The reservoir fluid fills the RC 16, and the separation piston 17 displaces the pressure sensor This ballast fluid through the hydraulic resistance 19 into the ballast chamber 18.

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The invention relates to sampling devices and can be used for; sampling from oil and gas condensate wells.

The purpose of the invention is to increase the reliability by eliminating the possibility of premature actuation of the actuator spool valve.

The drawing shows the sampler in the initial position before lowering into the well, the section.

The sampler consists of the following components and parts.

The upper part of the differential stem 1 is simultaneously a spool valve that blocks the radial openings of the inlet channel 2, which communicate the subvalvular cavity 3 of the check valve 4 with the working chamber. From the bottom side, the differential rod 1 is kinematically connected to the piston 5 of the hydrorelay via a bis sleeve by an adjustable check valve 7 by means of a cap nut 8. On the valve stem 7 a threaded sleeve 9 is worn, which is threadedly connected to the sleeve 6, and the cam protrusions are engaged with the nut 8, having corresponding cam projections. Spring 10 presses the valve 7 to the seat with a hole 11 in the bottom of the piston 5, under which there is liquid. Inside the piston 5 there are sleeves 12, on the surface of which helical grooves 13 are cut, which serve as hydroresistance. Nadporshnevaya cavity 14 Hydro relay is a chamber for the flow of fluid from the piston cavity 15.

Above the check valve 4 there is a working chamber 16, where the separation piston 17 is placed. Above the working chamber 16 there is a ballast chamber 18, which is separated from the working hydroresistance 19.

The sampler works as follows.

Before lowering into the well by rotating the differential rod!, Which is transferred to the sleeve 9 by means of the nut 8, the spring 10 is compressed to create the required force on the valve 7. The separation piston 17 is set to the lower position, and the over piston zone of the working chamber 16 is filled with ballast fluid. Differential rod порш with piston 5 moves the uppermost position, at which the inlet channel 2 is blocked. In the process of lowering the sampler into the well, the outer

pressure, which, due to the flow of the external medium through the radial channels' 2, acts on the differential rod 1 and the piston 5, as a result of which the fluid in

5 ⁴ cavity 15 is compressed. Having reached the pressure, on which the spring 10 of valve 7 is adjusted, the fluid overcomes the force of pressure of the valve and rushes into the capillary channel 13 of hydroresistance, and along it into the cavity 14. Due to the flow of fluid from

¹⁰ cavity 15 in the cavity 14 of the piston 5 with the rod 1 is moved down. Having reached the position shown in FIG. 2, the rod 1 exits the inlet channel 2, _ and the well fluid through the radial holes of this channel enters the cavity 3 and further, overcoming the spring force of the non-return valve 4, enters the piston chamber 20 of the working chamber 16. Separation piston 17, squeezing the ballast fluid into the ballast chamber 18, is set to the top ² θ of its position, as shown in FIG. 2. In this case, the check valve 4 closes and seals the sample.

The reliability of the sampler operation is ensured by the fact that the drive of the slide valve, which overlaps the inlet channel 2, comes into effect only when the sampler reaches the specified pressure at the calculated well depth in the immediate vicinity of the sampling site

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Claims (1)

Claim A sampler that includes a working chamber with a separating piston, the piston cavity of which is connected by hydroresistance with a ballast chamber, and the piston cavity is communicated by check and spool valves with an inlet channel, the slide valve actuator is in the form of a differential rod, and interacts. with a hydrorelay containing a chamber, a piston and a hydroresistance, characterized in that, in order to improve reliability by eliminating the possibility of a spool valve actuator acting prematurely, it is equipped with an adjustable check valve placed in the end of the hydrorelay and spring-loaded relative to the latter, and the piston of the relay is rigid fixed to the differential rod, and the piston chamber of the hydrorelay is connected to an adjustable check valve and hydroresistance hydrorelay with ipadporsh nevy cavity of the latter.