SU1263803A1 - Apparatus for drilling wells - Google Patents

Abstract

The invention relates to the drilling of wells and is intended to create a pulsating reduced differential bottomhole pressure. The purpose of the invention is to increase the mechanical speed of drilling due to the transfer to the bottom of the energy of a shock pulse of a jet of washing liquid. For this purpose, the flow interrupter 3 is made in the form of a sleeve that is rigidly mounted on the sub (L) 2 and rigidly connected to the rotational drive casing 6 with channels 11 and 12 and cavities 13 and 14. In channel {П) 2 there is a jumper 9, section aaaaaaaa (l cash supply fluid in it for two 1C O) 00 CX) 00

Description

channel 8 and Y. Channel 8 above lintel 9 communicates with channels 11 and 12 through an annular groove 17, and channel 10 under the lintel - through radial holes 18. In the drilling process, when pumping the flow channel 9 of the propellant, part of it enters the jet pump 16 , and the remaining part - on flushing through the separator 3 into the cavity 13 with a dropping spreader, where it is possible to regulate the flow distribution

with the help of a needle 15. The flow is interrupted due to the rotation of P 2 when re-. covering holes 18. Fluid through channel 10 flows to the bottom, then along with drill cutting through channel 12 enters the cavity 14 of the jet pump 16 and is discharged into the annulus. A vacuum at the bottom creates a pump 16, the flushing fluid to which is supplied through an annular groove 17. 1C. f-ly, 1 Il.

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The invention relates to the drilling of wells and is intended to create a pulsating reduced differential bottomhole pressure.

The purpose of the invention is to raise the mechanical speed of drilling due to the transfer to the face of the energy of a shock pulse of a jet of industrial fluid.

On the drawing shows the proposed device.

The device contains a rock-breaking tool 1, a sub 2, a flow conditioner, made in vivida concentrically located on the sub sleeve 3 with a seal 4. The body of the flow interrupter is rigidly connected by means of cams 5 to the drive corus 6 (downhole motor), the output shaft 7 of which It is connected with the sub 2. In this case, the output shaft 7 of the rotation drive 6 has a channel for supplying industrial fluid, which communicates with channel 8 of the iodized industrial fluid made in sub 2. In the channel of the sub in the size zone The sleeve 3 has a jumper 9, which divides the channel for supplying the washing liquid in the sub into two channels 8 and 10. The sleeve 3 has a channel 1 1 for supplying the washing liquid to the bottom and channel 12 for draining the cleaning liquid, in the sleeve 3 are also filled a strip 13 and 14 with throttling located respectively in them. element, made in the form of a needle

2

15 and a jet pump 16. A channel 8 for supplying the flushing fluid over the bridge 9 is connected to the cavity 13, a channel 11 of the sleeve, and a jet pump 16 through an annular groove 17. The channel O for supplying the washing liquid under the bridge 9 is connected to the channel of the sleeve and the radial

Holes 18.

The device works as follows.

During drilling, when pumping through the device through the channel 8 of the industrial fluid, part of it enters the jet pump 16, and the remaining part goes to flush through the flow injector into the cavity 13 with a throttling element, where it is possible to adjust the flow distribution with the needle 15. The flow is interrupted by; rotation of the sub 2 at overlap. these radial holes 1B., Liquid through the channel 10 enters the bottom and

Further, along with the drill cuttings, the channel 12 enters the cavity 14 of the jet pump 16 and is carried into the annulus. An underpressure at the bottom is created by the constant operation of the spacer pump 16, the flow of liquid in which is gradually supplied by the annular groove I 7.:

In the process of drilling during the pumping of the washing liquid in this manner, the surface areas of the bottom are subjected to intense impact

pulsed impact of the jet of sweeping fluid, which facilitates their intensive destruction by the drilling tool and contributes to the growth of the mechanical speed of drilling.

Claims (2)

1. A device for drilling wells, including a rotational drive, a pore-destructive tool, a connected sub with a channel to feed the sweep fluid to the bottom, a jet pump connected to the rinsing fluid supply channel and placed in the flushing fluid discharge channel, t l and ch yu e so that, in order to increase the mechanical speed of drilling due to the transfer to the bottom of the energy of the shock the pulse of the flushing fluid, it is equipped with a flow breaker made concentrically placed on the sub and rigidly connected to the housing of the rotational drive of the sleeve with channels and cavities, in the channel of the sub in the area where the sleeve is located the jumper above the bridge it communicates with the bushing channels by means of an annular groove, and under the bridge by means of radial holes. 2. The device according to claim 1, about 1 tl, which is such that the flow interrupter is provided with a throttling element, which is softened in the cavity of the sleeve, which communicates the channel for supply of washing fluid above jumper E channel under it.