SU1203233A1 - Device for obtaining cores and gas samples - Google Patents

Description

The invention relates to mining, is intended to obtain core samples with gas and can be used in the exploration drilling of wells from mining workings, from the surface of the earth - and on the offshore waters.

The purpose of the invention is to improve the quality of testing by increasing the sample volume.

The drawing shows the device in case of its application in a horizontal or rising well of a coal mine, general view.

A device for obtaining core-gas samples consists of a core-gas collector 1, which includes a housing 2 and a movable core receiver 3 with a die 4 having a thread on the outer surface. The housing 2 is connected to the adapter 5, in which flushing channels 6 are made. The front part of the adapter 5 is connected to the shank 7 by means of the slot-I

8. The shank 7 is connected via adapter 9 to the core receiver 3, the adapter 5 and the yoke 7 contain a subtrue: blue upper valves 10 and 11, Axial bearing 12 is located on adapter 9, and spring 13 is located between adapter 5 and bearing 12 The core receiver 3 in the gap between it and the housing 2 is fixed stops 14, with the housing 2 is connected to the drill crown 15. The core is located in the lubricator for sealing the wellhead, which consists of interconnected vestibule 16, stuffing head 17 and valve 18, 18 latch Res tee I 9 is connected to the wellhead 20. In the latch 18, the cover 21 is placed (lower) kerno- gazonabornika on the spline 22. At the bottom of lid 21 is placed a sealing gasket 3 February.

The injection system for supplying the flush fluid consists of a pump 24 with a suction pipe 25, a drain pipe 26 and a pressure line 27. The pressure pipe 27 is connected to the drill string 29 via the oil seal 28, which passes through the oil gland 17 and is connected to the adapter 5 of the gas core 1 A distribution valve 30 is located on the pressure line 27,

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a lubricator with a pressure system informing the connecting line 3. The connecting line 3 is equipped with a pressure gauge 32 and is connected to a tee 19, on the nozzle of which a damper 33 is located. A drain 34 is placed on a drainage line 26. The washing fluid is in the sump 35. The drilling and tripping operations are performed by the drilling machine 36, through which a drill string 29 passes.

The crane 30, the main 31 and the tee 19 with the damper 33 form a binding linking the lubricator to the injection system.

The device works as follows.

Before opening the reservoir of a mineral, for example coal or other rock containing natural gas, the wellhead 20 is blocked by a valve 18, and the pressure line 27 is operated by a distribution valve 30.. The pump 24 through the suction line 25 takes the liquid from the sump 35 and supplies it through the distribution valve 30 and the connecting pipe 31 to the tee I9 n to the well 20. By means of the damper 33 in the well, the pressure is maintained exceeding the pressure of the free gas in the rock. This pressure is controlled by the pressure gauge 32, and the liquid supplied by the pump through the damper 33 flows to the sump 35.

In the tambour 16 of the sealing head, a Corenasis gas box 1 is placed, the body 2 of which is connected through an adapter 5 to the pipes of the drill colony 29, which is passed through the stuffing box 17. Seal the articulation of the head 17 with the column 29. Open the valve 18, lift it, and The drilling machine 36 serves the Core Gauge 1 to the bottom of a well. After reaching the bottom, the crane 30 connects the connecting line 31 and supplies the flushing fluid through the valve 30, the main 27, the oil seal 28 and the drill string 29 to the gas turbine 1.

The flushing fluid, the passage through the column 29, opens the valve 10 and passes through the channels 6 of the adapter 5 into the gap between the body

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2 and a core receiver 3 and to the bottom of a well. Then she washes the crown 15. and returns to the mouth of the well 20, the stack through tee 19 and the damper 33 into the sump 35. At the same time, they maintain pressure in the well, controlling it by the gauge 32 and adjusting the fluid supply by the crane 34 on the drain line 26. The axial the load on the column 29, the core receiver 3 is sunk into the body 2, compressing the spring 13. The coupling connection 8 is opened, and the valve stem

10 resting against valve head

11, opens it. Then, the drillstring 29 is rotated. The crown 15 coals the coal and the die 5 is pressed into the bottom, forming the core. In this case, the core receiver 3 does not rotate, and the load on the die 4 is transmitted through the spring 13, the bearing 12, the adapter 9 and the core receiver tube 3. The core with gas fills the core receiver 3, expelling the liquid from it through the open valve 11. The gas at the center not excreted

since the pressure created in the well is maintained above the reservoir. After the end of the flight, the rotation is stopped and the string 29 is shifted from the bottom of the well. The core is detached from the bottom by means of a core device (not shown), the spring 13 pushes forward

core tube 3, stamp 4 and its threaded part extend beyond the crown 15, the elements of the spline joint 8 on the adapter 5 and the tailing editor N. A hub

Order 8396/37 Circulation 539 Subscription

VNISh State Committee of the USSR

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

Branch PPP Patent, Uzhgorod, st. Project, 4

03233

Vick 7 is engaged, and valve 11 is closed. Switch the flow of flushing fluid distribution valve 30 to the line

5 31. Valve 10 is closed. .

Keeping the pressure in the well, extracting the core gage I. The stops 14, resting against the crown 15, prevent the coring of 10 nick 3 from the casing. After the core gantry 1 comes out of the vestibule 16, the valve 18 is lowered. The key 22 interferes with turning the key 21 when

20 screwing thread.

Next, unscrew the head 17 or vestibule 16, unscrew the crown 15,. The core receiver 3 is separated from the housing 2. The core receiver 3 at the same time carries an adapter 9, a shank 7 and a valve 21, and another 21 - and a crown 15 between the stops 14 and a pole 21. On the one side, the core receiver 3 is closed

30 Krishka 21, on the other - valve 1 1. In this site, the core receiver is transported to the laboratory. To prevent leaks during transportation, it is advisable to bore the opening of the shank 7 above the valve 11 to additionally block the stopper, which must be equipped with a dp system connected to the test units of the laboratory.

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Sistavitel V. Aksler

Tehred S. Migunova. Proofreader I. Muska

Claims (1)

DEVICE FOR OBTAINING · 'CORE AND GAS Samples, containing a drill string, a core and gas inlet in the form of a body with a crown, an adapter, an upper valve, a lower cover and a movable core receiver having a thread for connection to the lower cover, as well as a discharge system for supplying flushing fluid in the drill string and core collection, characterized in that, in order to improve the quality of testing by increasing the volume of the sample, it is equipped with a lubricator to seal the wellhead and a harness communicating the lubricator with the discharge system, while the bottom cover of the core of the gas intake is located in the shutter of the valve of the lubricator. SU., „1203233 ί