SU825915A1 - Borehole-drilling apparatus - Google Patents

Description

The invention relates to mining, and in particular to devices for drilling wells.

Known tool for shock-rotary drilling, consisting of a housing with a shank and rock cutting elements in the form of removable cylinders mounted on an axis fixed in the housing with the possibility of rotation Shch.

'A disadvantage of the known tool is the loss of shock wave energy through joints.

A device for drilling wells is also known, including a housing, a central hammer with an intermediate hammer, a central bit, peripheral roller bits, each of which contains a paw, an inclined pin and a cone with a toroidal cavity and bearing [2J.

However, this device is characterized by a low drilling speed in hard rocks.

The purpose of the invention is to increase the drilling speed by creating additional impact loads on cones.

This goal is achieved by the fact that at least one peripheral 30 with the head 16 and the purge channels 17 and 18. In the hole of the housing 1 there is a paw 19, which is fixed with a key 20. The paw 19 is equipped with a pin 21 on which a peripheral roller cone 22 with a toroidal cavity is mounted 23, a bearing 24 and a ball lock 25. Coaxial holes 26 and 27 are made in the foot 19 and the axle 21, in which the intermediate hammer 14 is placed, the latter being in contact with the toroidal cavity 23 of the cone 22 with its spherical head 16.

A device for drilling wells works as follows.

The proposed device is attached to 15 to the drill stand (not shown), through which compressed air is supplied to the hammers 3 and 13. Axial force and torque are applied through the drill stand to the housing 1, and the device '0 rotates around the longitudinal axis at the cones 9 and 22 . When supplying compressed air to the housing 1, the hammers 3 and 13 work. The hammer 3 -. Cutting the intermediate hammer 4 transfers the shock load to the bit 5, which drills the central part of the hole and the shock absorber 2 protects the roller cone 9 from harmful vibration. The hammer 13 transmits the shock load. through the intermediate firing pin 14 and ¹ its spherical head 16 directly to the cone 22. The intermediate firing pin 14, cone 22 and paw 19 with pin 21 make a reciprocating motion parallel to the axis of the device. In the event of a collar 15 of the intermediate hammer 14 against the front of the hammer 13, the shock absorber 2 is activated. The torque from the housing 1 is transmitted to the roller cone 9 through the leg 40 7, the axle 8 and bearings 11 and 12, and to the roller cone 22 through the leg 19, the axle and bearing 24.

In the proposed device, the processing of the bottom of the well is additionally carried out using the shock load 5 applied directly to the roller cutter, which, together with the pin and the paw, makes a reciprocating motion relative to the axis of the device, which increases the drilling speed and IQ reduces the impact energy loss.

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Claims (2)

The invention relates to mining, in particular to devices for drilling wells. A tool for shock-rotating drilling is known, consisting of a body with a shank and rock-breaking elements in the form of removable cylinders mounted on an axis fixed in the body with the possibility of rotation. A disadvantage of the known tool is the loss of anergy of the shock wave through the connections. It is also known a device for drilling wells, including a housing, a central pneumatic hammer with an intermediate head, a center bit, peripheral roller bits, each of which contains a leg, an inclined trunnion and a roller cutter with a toroid-shaped cavity and a bearing 2. However, this device is characterized by a low rate of drilling for hard rocks. The purpose of the invention is to increase the speed of drilling by creating additional shock loads on the cones. The goal is achieved by the fact that at least one peripheral roller bit is equipped with an intermediate striker with an autonomous pneumatic hammer, and coaxial holes are made in the paw and inclined trunnion / in which an intermediate hammer with an autonomous pneumatic hammer is placed, while the interim hammer is made with a spherical head, in contact with the toroidal cavity of the cone, and the paw with an inclined trunnion is mounted in the housing with the possibility of axial movement. FIG. 1 shows the proposed device, frontal incision; in fig. 2 shows section A-A in FIG. 1. The device for drilling wells consists of a housing 1 fixed 3 it on the shock absorber 2 of an impact hammer 3 with an intermediate head 4 and a impact bit 5, which is fixed by a finger 6 in the housing 1. The paw 7 is rigidly fixed on the housing 1 and equipped with an inclined trunnion 8 on which a roller cutter 9 with toroid-shaped cavities 10 and bearings 11 and 12 is installed. In case 1, an impact hammer 13 is fixed on shock absorber 2, in front of which there is an intermediate striker 14 with shoulder 15, spherical head 16 and blowing holes 17 and 18. In the opening of case 1a paw 19 is installed, which is fixed by a key 20. The paw 19 is provided with a pin 21, on which a peripheral roller cutter 22 with a toroidal cavity 23, a bearing 24 and a ball lock 25 are mounted. In the paw 19 and pin 21 are made coaxial holes 26 and 27 in which an intermediate the striker 14, the latter with its spherical head 16 is in contact with the toroidal cavity 23 of the roller cutter 22. The device for drilling wells works as follows. The proposed device is attached to a drilling rig (not shown), through which compressed air is supplied to pneumatic hammers 3 and 13. An axial force and torque are applied through a drill onto the body 1, and the device rotates around the longitudinal axis on the roller cones 9 and 22 When the compressed air is supplied to the housing 1, the hammers 3 and 13 are operated. The air hammer 3, through the intermediate head 4, transmits a shock load to the bit 5, which drills the central part of the well. at the same time, shock absorber 2 protects Sharrishu 9 from harmful vibration. The pneumatic hammer 13 transfers the shock to the load through the intermediate head 14 and its spherical head 16 directly to the roller cutter 22. The intermediate head 14, the roller cutter 22 and the foot 19 with the trunnion 21 perform a reciprocating motion parallel to the axis of the device. In the event of a collision of the collar 15 about the intermediate striker 14 about the front part of the hammer 13, depreciation of the jam 2 is activated. The torque from the housing 1 is transmitted to the roller cutter 9 through paw 7, pin 8 and bearings 11 and 12, and to the roller cutter 22 - through paw 19, trunnion 21 and bearing 24. In the proposed device, the downhole treatment is additionally carried out with the help of a shock load applied directly to the roller cutter, reciprocating along the axle and the claw, relative to the axis of the device, which increases the drilling rate and reduces Teri impact energy. The invention The device for drilling wells, including a housing, a central pneumatic hammer with an intermediate head, a central chisel, peripheral roller cone bits, each of which has a paw, an inclined trunnion and a toro-shaped cavity and a bearing, characterized in that in order to increase the speed of drilling creating additional shock loads on the cones, at least one peripheral roller bit is equipped with an intermediate striker with an autonomous pneumatic impact hammer, and in the paw and inclined trunnion oosnye apertures in which are located an intermediate firing pin with self hammer, .If the intermediate firing pin is formed with a spherical head, in contact with toroidal cavity cutter, and foot with an inclined pin mounted in the housing with the possibility of axial movement. Sources of information taken into account during the examination 1. USSR author's certificate No. 273116, cl. E 21 C 13/06, 1967. 2. USSR author's certificate number 254426, cl. E 21 C 3/24, 1966. 25 Gz