SU252236A1 - DEVICE OF CONTROL OVER THE DIRECTION OF THE WELL IN THE DRILLING PROCESS - Google Patents

Description

Borehole monitoring devices are known that include a curvature sensor, a well azimuth sensor, and two diverting direction sensors.

The proposed device consists of a curvature sensor unit with a deflector direction sensor, enclosed in a container mounted above the diverter or bottom of the engine, and an azimuth sensor unit with a second diverter direction sensor, enclosed in another container mounted on a rod in the middle of the non-magnetic pipe above the standard.

Both containers should be provided with spring centralizers and annular elastic shock absorbers inserted into a cup holder and fixed in it by a nut with an end stop. This improves the accuracy of measurements of the direction of the trunk.

FIG. 1 shows a scheme for the insertion of containers with measuring blocks into the drill string; in fig. 2 is a diagram of the installation of the container of the measuring unit of the azimuth sensor into a standard non-magnetic pipe.

The sensors of the device are divided into two measuring units installed in autonomous containers, with the container 1 of the measuring unit of the curvature sensor with the deflector sensor (Fig. 1) embedded in a thick-walled steel pipe-tube 2 installed directly above the diverter 3, and the container 4 of the measuring sensor unit -ka

The azimuth with the deflector sensor is placed on the rod 5 in the middle of the standard non-magnetic pipe 6 installed above the adapter 7. This ensures the removal of the magnetic element of the azimuth sensor for the required distance and eliminates the influence of the ferromagnetic masses of the drilling tool.

The containers of the measuring unit of the curvature sensor and the measuring unit of the azimuth sensor are built in identically. They nodvesheny

(in a thick-walled steel casing-pipe 2 directly, and in a non-magnetic pipe 6 by means of a rod 5) on elastic annular shock absorbers 8, 9 (Fig. 2) embedded in a cup holder 10 so that

when unscrewing the nut 11 with the key 12, the container of the measuring unit of the sensor azimuth could rotate freely in the pipe using the key 13, and when screwing the nut 11 it could be fixed in any chosen position with the end stop 14 clamping its shank 15 through elastic ring absorbers 8, 9.

The yoke 10 is rigidly fixed to the weld-on support 16. In order to provide the tips on the axis of the drilling tool, two spring centralizers 17 are mounted on them. The latter consist of equally flat 120 ° spaced and circumferentially angled to the container axis irulsin 18 carrying sphere-shaped stops 19 on themselves. Such a design of centralizers makes it possible with sufficient accuracy to combine the axis of the measuring container with the axis of the pipe even when the container is inserted into a non-magnetic pipe with an internal heading end (See. Fizg. 2).

On the container of the measuring unit of the curvature sensor {FIG. 1) mounted suspension strut and prul: other centralizers. At the location of the luminae of the welded support 16, the container is inserted into the body-pipe 2 and fastened therein with a flange of the casing 10. The spring centralizers at the same time ensure that the axis of the container is cleaved along the axis of the pipe. The container of the measuring unit of the azimuth sensor on the rod 5 in the same way is installed in the case of a standard non-magnetic pipe 6 and is mounted on the welded support 16 of the upper sub.

Steel case-pipe 2 (see Fig. 1) is installed in the drill tool string directly above the diverter 3. The key 12 unscrew the nut 11 (see Fig. 2), releasing the elastic ring washers 8, 9, and then turning the container with the key 13 combine the zero position of the deflector sensor with the deflector line. Next, in the column of the drilling tool set ut 7 (see. Fig. 1), forming

which mark the zero position of the sensor deflector of the measuring unit curvature sensor. The zero position of the sensor of the deflector of the azimuth sensor unit is combined with this mark by turning the container of the measuring unit of the azimuth sensor 4, as in the case of rotation of the container of the measuring unit of the curvature sensor.

Subject invention

Claims (2)

1. A device for monitoring the direction of a well during drilling, including a curvature sensor, an azimuth sensor and a squall. Two deflector direction sensors, characterized in that, in order to improve the accuracy of measuring the direction of the borehole, it is implemented as a curvature sensor unit with a deflector direction sensor, enclosed in a container mounted above a diverter or a downhole motor, azimuth sensor unit with a second displacement direction sensor connected to another container mounted on a rod in the middle of a non-magnetic pipe above the diverter. 2. The device according to claim 1, characterized in that, in order to ensure the installation of the zero positions of the directional deflector sensors and the individual fixing of the containers in the pipe, both containers are equipped with three spring centralizers and annular elastic shock absorbers inserted into a cup holder, and fixed in it by a nut with an end stop. AA Bb nineteen ..Z