SU1236092A1 - Method and apparatus for drilling wells - Google Patents

Abstract

1. A method of drilling a well, including rotating a drill rod with a bit installed in a housing with eccentricity relative to the axis of the housing, and axial flow of the drilling HJTaHrH together with the housing, characterized in that, in order to expand technological capabilities, the bit is displaced in a radial direction relative to the axis of the housing by turning the upper end of the drill rod carry. but the axis of the body with an angular velocity not equal to the angular velocity of rotation of the drill bar, the upper end of the drill bar being rotated with an angular velocity a t - / g where a is the angle of rotation of the upper end of the drill rod, rad; P1 is the number of tags of the screw surface of the well in the well; / p - time of drilling, s; At that point, the point of application of the force turning the upper end of the drill rod is shifted towards the bit. (C (L ND 00 05 o co

Description

2. A method according to claim 1, characterized in that the time of displacement of a point at / south of the force that rotates the upper end of the drilling pit is less than or equal to the drilling time of the augmentation.

3. A device for drilling wells, which includes a rocking corn, a drilling shank with a chisel, installed in the housing eccentric to its axis, and a rotating eccentric disk placed in the housing and connected to the drilling P1tanga,

one

The invention relates to the mining industry and can be used in the development of mineral resources and the construction of pile foundations.

The purpose of the invention is the expansion of technological capabilities through the formation in the well of broadening of various configurations.

FIG. 1 shows a diagram of the device; in fig. 2 - structural diagram of the device; in fig. 3-8 - various forms1 1 widening in the well.

The device for drilling wells consists of a cornus 1, made in the form of a pipe, a main eccentric lisk 2, a drill rod 3, installed eccentrically to the axis of the cornus, and an additional eccentric disk 4. At the end of the drilling pit, a bit 5 is attached to the core. , in its lower part and connected to it by means of PODNIKNIKOVY node 6. Burov shtanga 3 is connected to disk 2 by means of a spherical hinge 7, giving, in addition, the ability to transmit a high torque from ujTaHrH 3 to disk 2, while s 7 is offset relative to the hinge axis of the housing 1. Additional eccentric disc 4 also is within Cornus, but in its upper part. Inside the body, along the line of its generator, is attached a piping 8, which with a small gap is placed in a nip slot 9, made in disk 4. The upper part of shtanga 3 is loosely inserted into hole 10, made in disk 4, with hole 10 being displaced relative to body axis. The rod 3 in the transport position of the device occupies a vertical position. The housing is installed in its rotation drive (not shown) with the possibility of its swinging.

characterized in that, in order to expand the technological capabilities, it is equipped with a further eccentric disk installed in the corns above the main eccentric disk with the possibility of oceoioi O to move and transmit torque, at the same time the hinge is hinged to the main disk and placed in the hole made in an additional eccentric disk and estimated by 1 about the axis of the body, installed with in:; 1 possibility of rotation.

- 0 5

five

The drilling method is as follows.

The drilling of a well begins with the vertical position of the drilling rig (FIG. D). Turn on the rotation of the drill rod with a chisel. The rotation of the shtangi causes the rotation of the main eccentric disk 2. If the corsus 1 is not turned, then the bit 5 makes a complex movement, describing an ellen-like trajectory. With an axial flow of the device, a cylindrical well is obtained, the bottom face of which is non-planar and represents an elongated el. If simultaneously turning the cornea 1 with an angular velocity different from the angular velocity of rotation of the drill rod, a borehole with a helical broadening is formed, the shape of any cross section of which is 1-111c. This is due to the fact that the upper end of the drill rod moves relative to the axis of the Cornus together with the disk 4 connected to the housing with a key joint, which ultimately deviates the bit 5 in the radial direction relative to the axis of the housing 1. When the housing 1 turns The 360 ° helical broadening in the borehole has a full turn, the tag of which is equal to the axial feed of the cornea 1. Simultaneously with the rotation of the barrels and the rotation of the body in the axial non-displacement downward of the additional eccentric disk 4, the maximum radial the deviation of the bit (and the inclination of the rod 3) increases (Fig. 1).

By setting different rotational speeds of the shaft, the body and the additional eccentric disk, it is possible to obtain helical broadening in the borehole of various configurations (Fig. 3-8).

Using the ratio

a-t

where with - the angular velocity of rotation of the upper end of the drill rod or body,

a - the angle of rotation of the body, glad; t is the number of steps of the helical surface

no wider well; tp is the broadening time. C, it is possible, by setting different values of w, to produce wells of various configurations with different numbers of steps.

In order to obtain a well of a computational profile, it is necessary that the mixing time of the additional disc 4 down should be less than or equal to the broadening drilling time.

When a well is formed, both eccentric discs roll over the bottom to

lotto, cause the body to rock. Rocking the body creates additional dynamic loads on the borehole walls transmitted from the body to the bit, and consequently, contributes to a more efficient well formation process.

After the well has been drilled, turning the rod 3 or housing 1 sets the rod in a vertical position and the device is removed from the well to the surface. In the formed well, a pile is installed or used for another purpose.

FIG. g

(P

five

FIG. one

Phage. eight

C) the shutter about 1. Chsrepenkina

Pe; uiKT () p M. VlanurTekhred I. Veres Corrector M. Makeimshinnets

Order 3000, 32Tiral 548Subscription

VNIIPI USSR State Committee

on inventions and discoveries

113035, Moscow, F - 35, Raushsk nab. 4/5

Branch PPP "Patent, Uzhgorod, st. Project, 4

Claims (3)

I. The method of drilling wells, including the rotation of the drill rod with a bit installed in the body with an eccentricity relative to the axis of the body, and an axial ----------- O 'where a is the angle of rotation of the upper end of the drill rod, rad; ηι is the number of steps of the helical broadening surface in the well; broadening drilling time, s; point of application of force, turning the upper end of the drill rod, the side of the bit. tp - moreover, they are shown in / / ** " SU „„ 1236092 2. The method according to π. 1, characterized in that the mixing time of the point of application of the force turning the upper end of the drill rod is less than or equal to the drilling time of the broadening. 3. A device for drilling wells, including a swinging housing, a drill rod with a chisel installed in the housing eccentrically to its axis, and a rotating eccentric disk located in the housing and connected to the drill rod, characterized in that, in order to expand technological capabilities, it is equipped additional eccentric disk mounted in the housing above the main eccentric disk with the possibility of axial movement and transmission of torque, while the drill rod is pivotally connected to the main disk and times placed in a hole made in an additional eccentric disk and offset relative to the axis of the housing, mounted with the possibility of rotation.