SU1332011A1 - Hydropneumatic timer for deep-well samplers - Google Patents

Abstract

The invention relates to the oil and gas industry and improves the reliability of the relay. The relay includes a housing 1 with a suspension assembly and inlet apertures 2. A hydraulic chamber (K) 5 filled with liquid has a hydraulic resistance 7 fixed to the housing 1 and a piston (R) 3 with a controllable rod 4. It is connected to the valve assembly with choice K 13. Additional K 9 -5 9 (L sh - -IS -1

Description

housing 1 has a P 10 and a return cla / pan 11. The sub piston space K 5 is imparted by resistance 7 with the super piston space K 9, Its sub piston space is filled with compressed gas and communicated through valve 11 with the external medium. As the relay descends from K 13 the fluid enters the well in the well casing into the cavity of the body i With a pressure in the well greater than in K 9, P 3 is lowered,

one

The invention relates to the oil and gas industry, namely, devices for sampling oil, gas and water in wells.

The purpose of the invention is to increase the reliability of work

The drawing shows a pneumohydraulic time relay for depth samplers, a general view,

The pneumatic-hydraulic time relay includes a housing 1 with inlet radial holes 2, a piston 3 with a control rod 4 and a hydraulic chamber 5 in which a sleeve 6 with a hydraulic resistance 7 and a check valve 8 is placed. To the lower part of the housing 1 an additional chamber 9 with a piston is attached 10, filled with sismama media, such as air under pressure, and its pores: Shen interacts with the hydraulic chamber 5 through the hydraulic resistance 7, and in the lower part of the additional chamber is installed spring loaded The valve guide 11 and the head 12

In the upper part of the housing 1, a sampling chamber 13 is fixed, which is connected with the inlet openings 2 by a hydraulic unit including forcalan 14 and inlet check valve 15,

Pneumohydraulic time relay works in the following way.

Before lowering into the well, the additional chamber 9 is filled with pressurized air from a cylinder through a check valve 11 to a value that is 50% less than the expected pressure at the sampling point from the well. Za3320) 1

As a result, the P 10 also moves downward compressing the air. The inlet channel of the inlet, non-return valve 15 K 13 is opened. Then the device with the sample is raised to the surface. In so doing, P 10 and 3 return to their original position. The use of relays in deep samplers eliminates

its accidental triggering during the descent process and the collection of poor quality oil samples. 1 il.

The cylinder is disconnected, the check valve is closed with the guide head 12.

After that, the time relay is connected to the sampling chamber 13 and lowered into the well on the wire. As the instrument descends into the well, the well liquid, entering through the radial holes 2 into the internal

the cavity of the body exerts pressure on the borehole 3. While the pressure in the additional chamber 9 is greater than the pressure in the well, the time relay does not work. When the pressure in the well is higher than the pressure in the additional chamber 9: the piston 3 starts to move downwards and the oil from 1 hydraulic chamber 5 begins to flow through the hydraulic resistance 7 into the extra piston space of the additional chamber 9, moving the piston 10 down and compressing the air. Controlling the rod 4, moving the piston 3 following it, there is no forcalan

14J which comes out of its seat and opens the inlet channel of the inlet check valve 15 of the sampling chamber 13. After filling it, the Breakdown device is lifted to the surface. As the wellbore rises, the pressure in the well decreases, and due to the pressure drop, the compressed air begins to move the piston 10 up and gradually squeeze

working fluid through the reverse

valve 8 to the hydraulic chamber 5, returning the piston 3 with the control rod 4 to the initial position, in which the time relay is already

I

prepared for the subsequent descent.

The volume of the additional chamber 9 is calculated in such a way that the pressure in it when the piston 3 reaches the lower position changes slightly to ensure complete flow of the working fluid from the hydraulic chamber 5.

The pneumatic-hydraulic time switch is filled with the working fluid once and then works without changing the working fluid and hydraulic resistance, which prevents disassembly of the relay and clogging of the hydraulic resistance by mechanical impurities. The use of a pneumohydraulic time relay in deep samplers eliminates the possibility of accidental operation during the descent process and the selection of low-quality oil samples from wells with high viscosity oils and waxed wells, the descent of the Pro Editor. N. Tupitsa

Compiled by E, Samoylenko

Tehred A. Kravchuk Proofreader L. Patay

Order 3779/29 Circulation 532 Subscription

VNIIPI USSR State Committee

on deLam inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab. 4/5

Production and printing company, Uzhgorod, st. Project, 4

The sampler lasts a few hours,

Claims (1)

Pneumohydraulic time relay for depth samplers, comprising a housing with a suspension assembly and inlets, a hydraulic chamber filled with fluid with a hydraulic resistance inside it and a piston with a control rod connected to the valve assembly with a sampling chamber, characterized in that the purpose of increasing the reliability of work, the body is made with an additional chamber, with a piston and a check valve, and the hydraulic resistance is rigidly fixed relative to the body, n The hydraulic space of the hydraulic chamber is reported by hydraulic resistance with the over-piston space of the additional chamber, and the last piston space of the latter is filled with compressed gas and reported by a non-return valve with the external environment.