SU875005A1 - Device for running instruments into well - Google Patents

Description

(54) DEVICE FOR DELIVERY DEVICES. Downhole

I

The invention relates to herring examinations of squalvesin and can be used to deliver instruments to reaming and horizontal wells.

Devices for delivering devices to wells are known, which contain devices that are fastened in the well, such as plugs or ruffs, for which a roller is fastened, through which a rope is passed, which is attached to the drill pipe. The device is pushed into the well drill pipe 1.

The disadvantage of these devices is the difficulty of securing and removing them from the well.

Closest to 1 m to the proposed technical essence is a device for delivering instruments into a well, which contains a mechanism for fixing in the well a transportation unit consisting of a roller and. the rope passed through it 1.23.

A disadvantage of the known device is low reliability due to the fact that when the device is pushed into the well by the drill pipe string, the cable located in the annulus is rubbed against the borehole walls and breaks, which excludes the possibility of delivery of the instruments into the well.

The purpose of the invention is to increase the reliability of delivering instruments to the well by preventing the device from rubbing against the wellbore walls.

This goal is achieved by the fact that the known device is equipped with a container in which the rope is placed, both ends of the rope being rigidly fixed in the container, and the latter is designed to be detachable from the hook mechanism.

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FIG. 1 shows the proposed device in the collection with the container and placed in it a rope, a section; in fig. 2 - delivery of the device to the well

using a device mounted on the bottom of a well.

The device contains a fixing mechanism consisting of an expansion cone 1 and a split sleeve 2. A roller 3 is mounted with a cone, freely rotating on the yoke 4 and suspension 5. The container 6 is connected to the sleeve by a left-hand thread 7. A rolling pin 8 with rope 9 is fixed in the container. the rope is made through roller 3 and rigidly fixed in the container.

The device is introduced into the well on the string of drill pipe 10 at any depth. Anchoring the roof bolting is carried out by axial load from the hydraulics of the machine through a string of drill pipes. Then the container (left-handed) is disconnected from the anchor bolts and, together with the drill pipe, is removed from the well. In this case, the rope 9 is unwound from the rolling pin 8. At the end of the pipe extraction, both ends of the rope are located at the mouth, an instrument 11 with a cable .12 is attached to one of them, which is intended for well testing, the other end is connected to a winch, with the help of which The device is delivered to the well. When the rope is not sufficiently strong enough to deliver the instrument, another stronger one is attached to the wellhead and, passing it through roller 3, the first one is replaced with it and then the instrument is connected to the well.

WITH . in order to reduce the effect of the spontaneous stranding of the rope upon delivery to the well of the device, the roller 3 is mounted on a freely rotating suspension 5.

The use of the proposed device can provide widespread introduction of downhole geophysics methods, improve the efficiency of geological exploration when drilling rebel, horizontal and slightly inclined wells of small diameter and large extent, since the device has high reliability compared to the known ones, since the rope is protected from breaks in the delivery device in the well on the drill string, and the drill string pipes can be of any diameter, and the value of the annular pipe the distance is not decisive.

Claims (2)

1.Kodzaev Yu.V. Drilling exploration horizontal wells, M., Nedra, 1978, p. 187-192. 2. USSR author's certificate number 608916, cl. E 21 B 47/00, 1977 (prototype J.