SU1530767A1 - Device for hydrodynamic well-logging - Google Patents

Abstract

This invention relates to a hydrodynamic study of wells. The device contains a housing 1 with a sealing 2 and a pressing 4 elements and a sampler installed therein 27. In the housing 1 there are 16 sampling and discharge valves, a sampling receiver and a pressure transducer 5 and made in the form of cylinders 13-15 with pistons 11,12 a telescopic piston with a rod 22 passing through it. Element 2 is made with a sample opening 3. Sample receivers are made in cylinders 13-15 telescopic piston. The rod 22 is designed as a differential piston biased relative to the body with the possibility of interaction with the sample receiving valve and connected to the valve 16. The latter is of the knife type. Under the action of reservoir pressure in the sample hole 2 of the element 2 and the atmospheric pressure in the channels, liquid and gas from the reservoir come under the pistons 11 and 12. The cylinders are filled with samples, this filling process is recorded by the transducer 5. 1 Cp f-ly, 2 ill.

Description

pressure transducer 5 and made in the form of cylinders 13-15 with pistons 11, 12, a telescopic piston with a rod 22 passing through it. Element 2 is made with a sample hole 3. Sample receivers are made in cylinders 13-15 telescopic piston. The rod 22 is complete in the form of a differential piston which is spring-loaded relative to the housing and can interact with the valve.

receiving samples and connected to the valve 16. The latter is of knife type. Under the action of reservoir pressure in the sample hole 2 of the element 2 and the atmospheric pressure in the channels, liquid and gas from the reservoir come under the pistons 11 and 12. The cylinders are filled with samples, this filling process is recorded by the transducer 5. 1 cp f-ly, 2 ill.

The invention relates to devices for hydraulic well survey.

The purpose of the invention is to increase the reliability of the device in deep wells.

On .1 shows a hydrodynamic logging device in the initial position; figure 2 - the same, in position in the study of the reservoir.

The device consists of a housing 1, on which a sealing element (shoe) 2 with an opening 3 for sample, a pressing element 4 is installed. Inside the housing 1 are integrated a primary pressure transducer 5, a sample inlet valve 6 with | Pusher 7, hydraulic channels 8-10, a telescopic piston consisting of pistons 11 and 12 in cylinders 13-15, valve 16 for sampling with a knife, stage 17, large stage 18, collar 19 and hydraulic channel 20, spring 21, rod 22 and body 23 communication chamber 23 and cavity 24 message housing with a well, the end first seal 25 gated channel 26 probo- collector 27. The rod 22 is extending through the telescopic piston

In the initial position of the device (Fig. 1) D1 "1 |, the potential pistons 11 and 12 are in the lowest position of their cylinders 13-15 due to the effect of the difference in hydrostatic pressure of the well through the cavity 24 at their small steps and the atmospheric pressure on. large steps from the sampler through channels 26, 20 and 10.

The sampling valve 16 is knife-like with steps 17 and 18 and

five

0

five

stem 22, in view of the equality of the area of the stem 22 of the area of the step 17 and the double area of the large step 18 of the area of the stem, is hydraulically balanced and under the action of the spring 21 is in the uppermost normally open position.

The device works as follows.

After the device is installed on the formation test section in the well, the actuator is activated from the surface, with which the sealing element 2 is pressed against the borehole wall by the pressing element 4 and seals the formation study section. Then, the actuator opens the sample inlet valve 6, while its pusher 7 moves the sample discharge valve 16 through the rod 22 to the lowest position, while the valve stem 16 is pressed into the seal 25 and seals the sampling container 27 from the cylinders 13 and 14 .

Under the action of the reservoir pressure in the hole 3 for the sample of the sealing element 2 and the atmospheric pressure in the channels 8-10, liquid and gas from the formation enter pistons 11 and 12.

When a certain pressure is reached, for example 50% hydrostatic at a given depth of investigation, one of the differential pistons, moving in the cylinder, retaining the pressure reduction coefficient, releases a certain volume for the sample from the formation, when this volume is completely filled, the pressure in this cylinder increases and when the pressure moves, for example 60% hydrostatic, the second differential piston moves, while also maintaining the coefficient of the pressure reduction indicated.

five

After the second cylinder is filled, the pressure in both cylinders is restored to the reservoir, the study of the section of the reservoir ends. The cylinder filling process, the current filling pressure and the recovery pressure of the reservoir pressure are recorded using a primary pressure transducer 5. By bringing the device from the surface to the initial position, the pressure element 4 closes the sample inlet valve 6, the samples in the cylinders 13 and 14 are pressure balanced, the pressure is equalized and sample hole 3 with hydrostatic, pusher 7 returns to its original position.

The valve of the sampling valve 16 under the action of the spring 21 returns to its original position, and the samples from the cylinders 13 and 14 under the action of the hydrostatic pressure difference at small stages of the pistons 11 and 12 through the cavity 24 into the well and the atmospheric pressure of the sampler 27 are squeezed through the channels 10, 20 and 26 in the sampler 27, and the device

Claims (2)

1. A hydrodynamic well logging device comprising a housing with sealing and clamping elements and a sampler installed therein, sampling and discharge valves, a sampling receiver, a pressure transducer and a piston in the form of cylinders with pistons with a rod passing through it the sealing element is made with a hole for  Samples, characterized in that, in order to increase the reliability of operation of the device in deep wells, the sample receivers are made in telescopic piston cylinders, the rod is designed as a differential piston sprung relative to the housing and interacting with a sample receiving valve connected to the sample dump valve. 2. The device according to Clause 1, about tl and - often, because the sampling valve is of a knife type. FIG. I