SU1654524A1 - Well cleaner - Google Patents

Abstract

This invention relates to io n i. The purpose of the invention is ulu - and well due to the regulation of the :: gt-vq pulses of compressed gas 6-o-peng depending on the downhole v touiin bunch m hj of the rotation frequency of the exhaust. yug0 rotator. For this purpose, an intrusion j 1 of the control unit of the spool valve 9 is installed. The latter and the swivel 13 are fixed on the housing of the rotator 1 A supply duct 11 is connected to the valve 9. The control unit of the spool pulse valve 9 is designed as a kinematically The rotary cam of the rotary cam connected to the output shaft 7 The latter is installed by the possibility of interacting with the valve spool 9 The last designation in the constant opening of iff and O 4.11. . j o | i sos-c ,, ch / (/ Xfl i1 / 1 VXf On 1M 12 UI IHx-Oill V (i4 (I /, vlljN G Py LF ni f with H, 1.1G1 (HN ir (IKiT. pff .. V f H 1, i) l JP tvljMi Ch l O l1 it,. B ь l C AND I ll HHIi KIJ i MO (, 1,, 1, 1. HJ KI t 3,., R. O l i. C, I O lt i f.) T folders o1 t i to .t nq i t. Repulsive, ifi ipt-U H n .KF t HtJ 4 PI IK n1 (jyDOBOi J Uj IrlNVl And, r I f1 l, I id KUHbi, 1 / L /) 1C

Description

r

i 1

about

v-T 4 SL

fo

-I.

C fg

The invention relates to a drilling technique and can be used to clean wells from drill cuttings using compressed air or gas.

The purpose of the invention is to improve the cleaning of the well by adjusting the frequency of the pulses of the compressed gaseous agent depending on the downhole conditions by changing the frequency of rotation of the output shaft of the rotator.

FIG. 1 shows the device, a general view; in fig. 2 shows section A-A in FIG. one.

A well cleaning device 1 with a drive and an output shaft 2. On the output shaft 2 of the rotator 1, gear 3 is rigidly fixed, the drill rod 4 with the tool 5. Gear 3 engages with gear 6, which is mounted on the shaft 7. On the latter also a fixed cam 8. is fixed, which together forms the control unit of the spool-type pulse valve 9. The pneumatic system contains a compressor 10, a spool-type pulse valve J, air ducts 11, 12 and a swivel 13. The latter is rigidly fixed on the housing of the rotator 1 and serve t for supplying compressed air to the rotating drill rod 4. Spool pulse valve 9 consists of body 14, spool 15 and spring 16. Body 14 is rigidly fixed to the body of rotator 1, and rotary cam 8 is installed with the possibility of interaction with the valve 15. In the body 14 of the spool valve, there is a continuously open throttling channel (orifice) 17, which connects the supply air duct 11 with the air duct 12 for passing a small volume of compressed air. The supply air duct 11 is connected to the spool pulse valve 9, and the air duct 12 connects the spool pulse valve 9 to the swivel 13.

The device works as follows.

When turning on the drive, the rotator 1 is driven into rotation gear 3, the drill rod 4 with the tool 5. Gear 3 through gear 6 drives the shaft 7 with the cam 8, which moves the spool 15 of the spool valve 9 with its protrusion and opens the hole for the passage of compressed air from the compressor 10 through the ducts 11, 12 swivel 13 into the internal cavity of the drill rod 4 and further to the bottom of the well. Upon further rotation of the shaft 7 with the cam 8, the spool 15 returns to the initial position under the action of the spring 16 and blocks the compressed air extraction.

Thus, when the shaft 7 is rotated with the cam 8, it opens and closes

spool valve 9, which causes a pulse supply of compressed air for cleaning wells. In the closed position of the spool-type pulse valve 9, the volume of compressed air accumulates and its pressure increases. Part of the volume of accumulated compressed air through the throttle opening 17 of the housing 14 is fed into the downhole zone to avoid sticking the bottom hole

5 Another (most) part of the compressed air volume accumulates in the compressor 10 and is discharged downhole when the spool valve 9 is opened.

The frequency of compressed air pulses during drilling is controlled by varying the frequency of rotation of the drill rod. Criteria for determining the need to change the frequency of the pulses and assess the cleaning efficiency will be five times the size of the drill cuttings fractions removed from the wells and the rate of penetration of the well. Insufficient cleaning leads to a decrease in the rate of penetration due to overgrinding of the sludge particles in the bottomhole.

0

Claims (1)

DETAILED DESCRIPTION OF THE INVENTION A device for cleaning wells, including a rotator with a drive and an output shaft, a swivel and a pneumatic system in the form of a supply duct and a slide valve, connected by a duct to a swivel, characterized in that. to improve well cleaning by frequency control 0 pulses of compressed gaseous agent depending on the downhole conditions by changing the frequency of rotation of the output shaft of the rotator, it is equipped with a spool control unit located on the rotator 5, a pulse valve, a swivel and a spool-type pulse valve are fixed to the rotator housing, the supply air duct is connected to the spool-type pulse valve, and the spool control unit 0 a pulse valve is made in the form of a rotator of a rotary cam connected to the output shaft of a rotary cam kinematically connected to the spool of the slide valve. 5 of the valve, while the latter has a permanently open throttling channel in the housing that connects the supply duct with the duct connecting the slide valve with the swivel. Fig 2