SU1286723A1 - Apparatus for changing borehole direction - Google Patents

Abstract

This invention relates to drilling wells with detachable cores. receiver and allows you to increase the reliability of the device. To do this, it has a core tube (QD) 1 with a crown 2 in which the guide rod 3 is placed. It contains a supporting spherical surface (SP) 4 at the upper end, and a fixing element 5 in the form of a spring-loaded one mounted on the hinge 13 staples 14, cut with a rod surface 3 wedge. On the outer surface of the rod 3, safety rings 12 are installed. In the lower part of CT 1, there is a saddle 6 below a O) ND 00 One ISO CO fie. R

Description

SP 4 of the rod 3, with which the eccentric weight 7 is connected by means of a cam clutch. The latter is made in the form of two half-couplings (PM) 8 and 9 installed with a gap. In this case, IM 8 has a protrusion 10, and PM 9 has an inclined groove 11 for its placement. Through the drill pipe, the rod 3 with the load 7 is installed SP 4 on the saddle 6 in CT 1. Freight 7 with PM 8. Are shifted down, and the rod

3 deviates from the well axis. The device is lowered into it before installing the rod 3 on the bottom. In this case, the element 5, moving down the borehole wall, will enter the groove, and the clamp 14 will fix the rod 3. Rotating CT 1, the crown 2 moves along the rod 3 and destroys the borehole wall in the direction of its skew. 1 hp f-ly, 4 ill.

one

The invention relates to a drilling technique and can be used in wiring directional wells with projectiles with a removable core receiver.

The purpose of the invention is to increase the reliability of operation.

Fig. 1 shows a device for changing the direction of a borehole in the working position, longitudinal section; figure 2 - section aa in figure 1; on fig.Z - section bb in figure 1; 4 shows a section B-B in FIG. one .

The device for changing the direction of the borehole includes a column pipe 1 with a crown 2 placed in its cavity with the possibility of rotation and axial movement of the directional spindle 3 having a bearing spherical surface at the upper end

4, and on the bottom - the locking element

5, a saddle 6 located in the lower part of the core pipe 1 under the supporting spherical surface 4 of the guide rod 3 and an orientation unit connected to it with a cam clutch, made in the form of an eccentric weight 7. The cam coupling consists of two coupling halves installed with an axial clearance 8 and 9. The upper half-coupling 8 is provided with a guide protrusion 10, and the lower 9 has an inclined groove 11 for its placement. On the outer surface of the stem 3, the safety rings 12 can be rotatably mounted, and the locking element 5 of the guiding rod 3 can be made in the form of a spring-loaded bracket 14, which forms on the hinge 13, forming c. rod surface 3 wedge. In the cavity of the column tube 1, the support sleeves 15 are installed under the eccentric weight 7. The top of the coupling half 8 is fixed to

the end part of the eccentric load 7 by the nut 16, and the bracket 14 of the fixing element 5 is spring-loaded with an insert 17 of elastic material.

The device for changing the direction of the borehole works as follows.

Before starting to drill an inclined wellbore from a core

pipes 1 remove the core receiver (not shown) and with a crown 2 form a core column with a height of 5-10 cm at the bottom. Then the core pipe 1 is raised above the bottom.

On the surface, the guide rod 3 with the coupling and this; the centric load 7 is mutually oriented and fixed by a nut 16. Through the hole of the drill pipe

- a guide rod 3 with an eccentric load 7 is delivered to the core pipe 1 and is installed with the supporting spherical surface 4 on the saddle 6. At the same time, the eccentric load 7 and the upper coupling half rigidly connected with it will shift to the lowest position, and The stem 3, due to the interaction of the guide protrusion 10 with an inclined groove 11, which is fulfilled in the lower coupling half 9, deviates from

 the borehole axis is at an angle of 0. The eccentric weight 7, rotating in the support sleeves 15, is set to a position where its center of gravity is in the apsidal plane

0

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borehole.

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FIG. 2

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Claims (2)

1. A device for changing the direction of a borehole, including a core pipe with a crown, 0 5 0 0 five placed in its cavity for rotation and axial movement of a guide rod, having a supporting spherical surface at the upper end, and a fixing element located at the upper end, a seat under the supporting spherical surface of the guide rod, and a unit connected to it in the lower part of the core pipe orientation, characterized in that, in order to increase the reliability of operation, the guide rod is connected with the orientation of the cam clutch, consisting of two coupling halves installed with an axial clearance, abzhena guide protrusion, and the bottom has a slanted groove for its positioning, the orientation node is in the form of an eccentric load. 2. The device according to claim 1, wherein the safety rings are mounted on the outer surface of the guide rod, and the locking element of the guide rod is made in the form of a spring-loaded bracket mounted on the hinge, forming with the stem surface wedge. XI- / 1 FIG. 2 fie.Z 6-5 in-in Compiled by B.Rodina Editor K.Voloshchuk Tehred M.Hodankch Proofreader LT ske Order 7691/31 Circulation 532 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 fie.