SU1350328A1 - Well-drilling apparatus - Google Patents

Abstract

The invention relates to the drilling of oil and gas wells and is intended to intensify the flushing of a well during drilling. The goal is to increase drilling efficiency and increase the degree of grinding of sludge particles. For this, the housing (K) 3, the drive shaft 1, the supplementary K 8, and the outer race 15 K 8 are made with running sinusoidal tracks (BSD) under the bodies. The ratio of the BSD periods of the additional K 8 and the clip 15 is greater than the ratio

Description

periods BSD main K 3 and shaft 1, On the outer sides of the K 3 and 8 are made of the spiral blade (SL) 4 and 12, oriented opposite to each other. Between SL 4 and BSD of the main K 3 is placed a separator 6, which is fixed and rigidly connected to the drill string 7. The separator 6 has a holder 1-5 fixed and K 8 is made with an inner sleeve 13. For K 8 the leading link is with a shaft 1 separator 9. Lower

1350328

The SL 4 section and the upper SL 12 section have incisors 17, arranged in a checkerboard pattern. During drilling, K 3 has a direction of rotation opposite to the direction of rotation of K 8 and bit 19. Due to the centrifugal forces and the change in direction of movement, the sludge particles are gradually ground and carried into the annulus. The incisors 17 regrind the large particles, which are then picked up by SL4. 1 hp f-ly, 5 ill.

one

The invention relates to the drilling of oil and gas wells, namely, devices incorporated in the drill pipe and intended to intensify the flushing of the well during drilling.

The purpose of the invention is to increase the drilling efficiency and increase the degree of grinding of sludge particles.

FIG. 1 shows a device for drilling wells, a general view; in fig. 2 shows a section in FIG. 1j in FIG. 3-section BB in FIG. 1 | 4 shows a scan of the running sinusoidal tracks of the main body and the shaft; in fig. 5 is a sweep of the race sinusoidal tracks for an additional body.

- The device for drilling wells includes a drive shaft 1, on which a four-period running sinusoidal track 2 is made, and a housing 3 with spiral vanes 4 on the outside and a single period running sinusoidal track 5 on the inside. Between them is placed the separator 6, which is fixed and rigidly connected to the body of the drill string 7.

For the additional housing 8, the separator 9 is a driving link, which is connected to the drive shaft 1. In the separators 6 and 9, slots 10 are made in which the balls 11 are placed. Additional housing 8, on the outer side of which are spiral vanes 12 oriented opposite to the blades m 4 cases 3, in

five

It is a driven link. The additional body 8 is connected to the inner sleeve 13 of the additional accelerator, on which a six-periodic running sinusoidal track 14 is made. The separator 6 of the housing 3 is connected to the outer race 15, on the inner side of which a double period is made — to the running sinusoidal track 16.

In the lower portion of the spiral blades 4 of the body 3 and the upper portion of the spiral blades 12 of the additional body 8, carbide cutters 17 are arranged in a checkerboard pattern. The sub 18 and the chisel 19 are attached to the lower end of the device.

The device works as follows.

Spiral, - and blades of 12 additional buildings - 8, the direction of rotation of which coincides with the direction of rotation of the bit 19, occurs

(- capture and acceleration of the drilling fluid together with sludge particles. Accelerated particles fall on the spiral blades of the housing 3, which rotates in the opposite direction. Due to centrifugal forces and changes in the direction of motion, the particles are gradually crushed and, acquiring additional kinetic energy, is carried into the annular space. Large particles of sludge, falling on the cutters 17,

 subjected to additional grinding, picked up by spiral blades 4 and carried away by the upward flow.

0

0

The direction of rotation of the body 3, opposite to the direction of rotation of the additional body 8 and the bit 19, makes it possible to stabilize the drill string 7 away from the predetermined direction.

Claims (1)

1. A device for drilling wells containing a rock-breaking tool, a string of drill pipes, a drive shaft, a casing with spiral blades and an additional casing with spiral blades oriented in the opposite direction with respect to the blades of the casing, so that in order to increase drilling efficiency, it is provided with an outer cage and separators, one of which is connected to the drill string, and the other to the drive shaft, BUT-/( the outer cage is fixed on the separator connected to the drill string, the additional body is made with an inner sleeve, and the body, the drive shaft, the additional body and the outer body of the additional body are made with sinusoidal tracks under the rolling bodies, and the ratio of the periods of the running sinusoidal tracks of the additional body and the outer ring is greater than the ratio of the periods of the running sinusoidal tracks of the housing and the drive shaft. 2, The device according to p. T, is about the fact that, in order to increase the degree of grinding of the sludge particles, the lower part of the spiral blades of the housing and the upper section of the spiral blades of the additional housing are provided with cutters arranged in a checkerboard pattern. FIG. g 6-6 Fig.Z