SU1232793A1 - Hole-bottom transmitter for coal seam junction indicator - Google Patents

Description

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2. Sensor pop. 1, which differs from the fact that the chambers are located below the radial holes of the hydraulic bushing and are configured to communicate with the axial hole for the passage of the washing liquid in the core spear mode.

H3 (5) is related to mining equipment, and names to devices for determining the moment when coal seams meet when drilling geological exploration wells.

The purpose of the invention is to increase the reliability of the device in the operation of the core casting mode at ei o selection.

Fig. 1 is a schematic diagram of the signal of the meeting of coal nlasts; in fig. 2 and 3 - bottom-hole sensor, longitudinal section; FIG.

A - section A - L in FIG. 2; 5 shows a section BB in FIG. 3; on

Section B-B in FIG.

on

6

7- section GGD in FIG. 3; on

8-1 hydraulic locking device when drilling in the pre-corner zone; figure 9 is the same at the time of the meeting of the coal seam; in fig. 10 - the same, at the moment of opening the chamber with the clutch material; in fig. 11 is a view of D in FIG. ten; FIG. 12 is a section EE of FIG. 10. FIG.

The signal meeting of the coal pipelines contains located between the drill pipes 1 and 6ypOF5bIM

Outrigger 2 downhole sensor 3 and surface signal unit 4 connected to the injection pump line 5I of the drilling pump 6 (Fig. 1). As a signal node 4, for example, an electrical contact pressure gauge with a sound or light signal can be used. The communication channel is a column of washing fluid in the string of drill pipe 1.

The downhole sensor (FIGS. 2 and 3) contains an upper adapter 7 connected to a string of drill pipes I. In the lower part of the upper non-adapter 7 there is an opening for the passage of flushing fluid threaded for pressure 3, Sensor PP, 1 and 2, o This is due to the fact that the cavity of the chambers on the outside is surrounded by a cylindrical casing attached at the lower end of the spline shaft, with the upper edge of the casing located below the radial holes of the splined shaft.

There is a shaft of spline shaft 8, which has an axial 9 and radial 10 channels. The spline shaft 8, with its splines, enters the mark with the spline grooves of an ishitz adapter 1 (FIG. 4), to which an emergency response adapter 12 is connected with a thread for connecting a drilling projectile (nanometer, which is one pipe) 2 The splined shaft 8, by its lower part, enters the hydraulic sleeve 13 with radial openings IА and 13, below these openings in the hydraulic coupling sleeve 3 there are chambers 16, which are limited to the inner contour by the shape of the shaft 8, and on the outer contour are closed by a cylindrical casing 17 connected with helper threaded core with shlip, with a double shaft 8. In the chamber 6, pre-clamped material is placed. On the upper part of the kp and the spline shaft 8, there is an elastic element, made, for example, in the form of a coil-set spring-loaded springs 18 and an upper end bounded by the adapter 7 and a washer 19. resting on the end of the flange 1 The cavity with cup springs 18 is closed by a nozzle 20 connected to the upper transition-: -P1Kom 7. In the initial position, the openings 10 tsip1o, evoy shaft 8 and openings 14 1 of the hydraulic BTyjiKVT 13 copnajia- south, and the chamber 16 with the locks material is closed by the casing 17.

,

The downhole sensor 3, together with the drill bit 2 on the string of drill pipe 1, is lowered into the well. In the absence of an axial load on the string of drill pipes I through the axial channel 9 and the radial holes 10 and 14 of the bottom hole sensor 3, the flow of the flushing fluid is unhindered, which allows

to wash the well before drilling (Fig. 3 and 5).

In the course of drilling, when an axial load (8-10) "10 N" of the upper adapter 7 with a splined shaft 8 is created on the drill rig, the ERNIZ is moved, and the cup springs 18 are compressed. The hole 10 of the splined shaft 8 and the aperture 15 of the hydraulic sleeve 13 coincide, ensuring free flow of flushing fluid in the drilling screen 2 (FIG. 8). Rotation from the drill pipe string 1 using a splined joint (splined shaft

8 - spline adapter 11) is transmitted to the drill hole 2.

On alarm device 4, a response limit of about 1.5 times the steady-state pressure of the drilling fluid during drilling is set.

When the drill bit is inserted at the reaction corner of the bottom hole, the set of disc springs 18 is partially unclenched, a spline adapter 11, an anti-breakdown adapter 12 and a hydraulic sleeve 13 downstream to the splined shaft 8 are bridged. In this case, the hydraulic sleeve 13 closes down 10 spline shaft 8 (Fig.9). Movement of flushing fluid in the channel

9fire stops and occurs in 32793

lenke water hammer. A wave of increased pressure at a speed of 1000-1200 m / s moves along the column of flushing fluid in the string of drill pipe 5 to the signaling device 4. As the pressure of the flushing fluid rises to the value set earlier than the trigger level, the sound or light signal will turn on.

After the meeting of the Needle layer, rotation of the drill string is applied, an axial load on the drilling rig (15-17) “10 N is created and

5 pumping flushing fluid. The upper adapter 7 and the spline shaft 8 move down, and the cup springs receive maximum compression. At the same time, the casing 17, moving down, opens the chamber 16, Flow of Flowing fluid, the passage through the axial channel 9 and the holes 10 of the spline shaft 8, blows out material from chambers 1 b into the internal cavity of the drill bit 2 (figure 10). When occurred, | In this case, the flow of flushing fluid passes through the axial channel 9, the aperture $ {10 of the spline shaft 8 and the aperture J4 of the hydraulic shear 3. The core casting ends with known technological methods. .

25

thirty

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Fig.Z

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6-6

77

sixteen

lit

Vidl

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Editor A. Kozorie

Compiled by A. Borovitsky Tehred M. Khodanych

Order 2747/33 Circulation 548 Subscription

VNIIPI USSR State Committee

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

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

ig. eleven

Proofreader M. Demchik

Claims (3)

1. BOTTOM SENSOR OF THE SIGNAL COAL MEETING SIGNAL, comprising a hollow upper adapter with a spline shaft with axial and radial holes for passage of flushing fluid, a spline adapter with a hydraulic sleeve having radial holes, while an elastic element is located between the upper and spline adapters, and a hydraulic sleeve and a spline shaft form a water lock, characterized in that, in order to increase the reliability of the device in operation in the core splicing mode during its selection, it is equipped with chambers material located in the hydraulic sleeve. gaSUg., 1232793 I 232793 2. The sensor according to π.1, characterized in that the chambers are located below the radial holes of the hydraulic sleeve and are configured to communicate with an axial hole for the passage of flushing fluid in the core splicing mode. 3. The sensor according to paragraphs. 1 and 2, on the condition that the cavity of the chambers is externally enclosed by a cylindrical casing fixed 'at the lower end of the spline shaft, the upper edge of the casing being located below the radial holes of the spline shaft.