SU1476100A2 - Apparatus for drilling square-section wells - Google Patents

Abstract

The invention relates to a drilling technique. The goal is to increase the reliability of the device in strong and viscous rocks. The device consists of a gearbox housing 1 and an additional tool body 2. On the opposite side of the tool body 2, a support 19 with a base 20 is fixed on the gear housing 1. A base 21 is fixed to a beam 21 with rays 22. A cleaver is connected to the base 20 by means of an elastic connection (C) 26, hinged through the brackets 25 on the beams 22 crosses 21. The axes 24 of the brackets 25 in the plan are located radially in the middle between the horizontal output shafts 11 and 12 of the gearbox 1 and are inclined to the longitudinal axis ya. At the same time C 26 is reinforced with spikes 27, the longitudinal axes of which are inclined to the longitudinal axis C 26 in the direction opposite to the location of the drive shaft 6 of the drilling machine. On the output shafts 11, 12, drilling tools 14 and 15 are installed with rock-breaking elements 16 and 18. During the upward movement of the drilling machine, the gearbox housing 1 moves away from the bottom. The spikes 27 are embedded in the rock blocks. Upon further upward movement, the C 26 devices turn and break off a rock block. 2 Il.

Description

one

The invention relates to a drilling technique and is intended for drilling out cylindrical leading wells and production with a rectangular cross section.

The purpose of the invention is to increase the reliability of the device in strong and viscous rocks.

Figure 1 shows the device, a general view; figure 2 - the same in the plan.

-and 1

about

The device consists of a gearbox housing. 1 and an additional workman v.

of the body 2. On the body of the working body 2 are placed rock-breaking elements 3, made in the form of incisors. The rock-breaking elements 3 are installed on the gearbox side, their axes are parallel to the axis of the device, they themselves are mounted on the body 2 with the help of fixing screws 4 and protrude beyond the gearbox 1. The body of the working body 2 is fastened

INJ

to the input shaft 5 of the gearbox 1. The drive shaft 6 of the drilling machine (not shown) can be connected to the shaft 5 or to the body of an additional working body 2. On the drive shaft, bevel gears 7 and 8 coaxially attached to each other, kinematically connected with gears 9 and 10. The latter are mounted on horizontal output shafts 11 and D2, the ends of which are output shafts of the gearbox. The shafts 11 and 12 are mounted in the bearing supports 13, their axes lie in mutually perpendicular planes and intersect the longitudinal axis of the gearbox housing. On the output shafts of the gearbox, located in a horizontal plane, drilling tools 14 and 15 are installed, made in the form of discs with nor gearing elements 16. Each disc has a hub 17, on the outer surface of which rock-breaking elements 18 are mounted. Shafts 11 and 12 are offset one the other in height, and the disks 15 in the outer diameter are less by two widths of the slits cut by them in comparison with the disks 16. On the opposite side with respect to the additional working body on the gearbox housing 1 is reinforced with Toyka 19, on which the base 20 is fixedly placed. At the free end of the rack 19, the crossbar 21 is fixed, made in the form of beams 22 of the crosspiece. The number of cross beams is equal to the number of blocks being cut off 23. With cross beams

articulated via axle 24 connect

The brackets 25, which have scissors 26, are oriented in the cross-sectional angles of the well and reinforced with spikes 27, whose tip is inclined in the direction opposite to the movement of the device during drilling. The cleavers 26 and the base 20 are interconnected by an elastic bond 28. The longitudinal axes of the cleavers 26 are inclined to the longitudinal axis of the device above the plane passing through the centers of the hinge attachment of the cleavers and the normal axis of drilling.

A device for drilling wells with a rectangular cross section is as follows.

The torque and feed force from the drilling machine through the drive shaft 6 is transmitted to the input

Q

five

0

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shaft 5 of the gearbox 1. From the input shaft 5, the working body 2 receives rotation and, through a system of bevel gears 7 and 8, and gear wheels 9 and 10, drilling tools 14 and 15. The discs cut through the rock mass (coal) slit in the rock mass (coal) and The rock-breaking elements 18 on the hubs 17 divide the rock mass (coal) into four blocks. When drilling large wells in strong or viscous rocks (coal), separation (self-crushing) of blocks is difficult. Blocks with large linear dimensions can drill the well, as well as seize the housing 1 in the well. The absence of the arrival of damage control gears to the machine indicates that the blocks fail to break loose.

i In the absence of the arrival of degradation products from the well, the machine feed mechanism through the drilling machine becomes a device that the forward movement from the machine is reported. To accomplish this movement, the direction of movement of the feed cylinders is reversed. During the forward movement upward from the machine, the housing 1 moves away from the slab, bringing the rock-breaking elements 16 and 18 out of contact with the array. Cleavers 28 at the beginning of the departure (lifting) of the housing 1 are located in contact with blocks of rock (coal). The spikes 27, the tip of which is inclined to the borehole wall and in the direction opposite to the movement of the device during drilling, are inserted into the blocks. Upon further withdrawal (ascent) of the device, the shears 26 begin to rotate about the axes 24 and break off the rock block (coal). Breaking of the block by the cleavers 26 becomes possible, since the longitudinal axis of the cleavers is located above the plane passing through the centers of the axes 24 and the normal drilling axis. When lifting the device, the cleavers 26, turning relative to the axes 24, tend to be located in their specified plane with their longitudinal axes.

The slope of the spikes 27 to the wall of the well and in the direction opposite to the movement of the device during drilling, eliminates; slippage of supporting surfaces with spikes relative to the blocks when they are} spalled, and when drilled, well 51

Spikes have minimal resistance to movement of the device. Separated blocks fall into advanced

well. The displacement of the blocks to the well axis contributes to making the lower part of the gearbox housing 1 in the form of a truncated cone. If blocks of rock (coal) do not penetrate into an advanced well, they are crushed by rock-breaking elements 3 as the working body 2 rotates. Lifting the body t stops and continues expansion of the well, while elements 3 crush rock blocks (coal) and facilitate the passage of pieces of rock. (angle) down.

Claims (1)

Invention Formula A device for drilling wells with a rectangular cross-section on avtosv. № 1252471, about tl and h g 5 0 006 It is so that, in order to increase the reliability of the device in strong and viscous rocks, it is equipped with a stand with a base fixed on the opposite side of the additional working body on the gearbox housing, a crosspiece attached to the base, connected to the base by means of elastic connection by cleavers, hinged through brackets on the crosses beams, while the axes of cleaver brackets in the plan are radially midway between the horizontal output shafts of the gearbox and tilted to the longitudinal axis of the device, and the cleavers reinforced with spikes, the longitudinal axis of which is inclined to the longitudinal axis of the cleavers in the direction opposite to the location of the drive shaft. /// //; /// /// /// /// /// Editor A.Lezhnina Compiled by L. Cherepenkin Tehred M. Didyk Proof-reader V. Hirn Order 2138/31 Circulation 515 VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab. 4/5 /// ////// ///////// /// 2 Subscription