SU927998A1 - Rod-less percussive tool for sinking holes - Google Patents

Description

The invention relates to mining and construction machines and can be used for drilling predominantly revolving wells in unconsolidated rocks of low strength, such as coal.

A percussion drilling rig is known for drilling holes in rocks, which includes a housing with a hammer located therein, an air distribution device, a braking device, a rock-destruction tool of the bottom hole blowing and cuttings removal system. Such a projectile has kinematically interconnected udna and tool located on the body of the projectile of flexible guides, and a channel for the removal of broken rock from the bottom is formed between the borehole wall and the body 11.

The disadvantage is the high energy intensity of the process of destruction and the lack of efficiency of removal from the bottom of the destroyed rock.

The closest to the proposed technical essence and the achieved result is a rod-free impact drill for drilling wells in rocks, containing a housing with working cavities, a drummer, a distribution nozzle, an inlet channel and a central channel

s for the release of the energy carrier, a rock destructive tool and a device for preventing projectile movement in the opposite direction 2.

The disadvantage of this snake is

Q The possibility of clogging the annular channel with large pieces of broken rock and stopping the projectile in the well due to the difficulty of exhausting the energy carrier from the working cavities of the body, as well as the high energy intensity of the destruction process to crush the fractured rock into small particles.

The aim of the invention is to increase the efficiency of the removal of the destroyed rock from the bottom and reduce the energy of the destruction process.

The goal is achieved by the fact that in a non-shafted projectile deforming action for wells, including a housing with working cavities,

25 drummer, distribution pipe, exhaust channel and central channel for exhaust of energy carrier, rock destructive tool and device for preventing movement

Claims (2)

30 projectiles in the opposite direction, the channel for the removal of ruptured rock is made in the distribution pipe. In addition, an annular groove is made on the air distribution pipe, which is periodically communicated with the front working cavity and the energy carrier network. The drawing shows the proposed rod-free percussion projectile for drilling wells. The rod-less projectile consists of a cylindrical body 1 in which the drummer 2 is placed. The drummer 2 with the bottom of the body forms a working cavity 3 and 4. The distribution valve 5 passes through the drummer, on which an annular groove 6 is made. This groove is periodically communicated with the front working cavity 3 and energy network (pneumatic hydraulic system). In the wall of the nozzle 5, exhaust channels 7 are made, and in nick 2, intake channels 8. In the air distribution nozzle 5, channel 9 is made for the removal of the destroyed rock from the bottom. This channel is in communication with exhaust channels 7. A rock-destructive tool 11 is installed on the fracture, which is part of the body 1 with the help of a rolling pin 10. A device 12 is installed in the rear part of the body to prevent the projectile from moving in the opposite direction as it moves to the bottom of the well. This device can be made in the form of ribs located on the housing or radially moving elements, etc. to create frictional force between the borehole wall and the shell. The rear working cavity is permanently connected to the energy carrier network through the air duct 13, which can be made coaxially with channel 9 for the removal of the destroyed rock. The projectile works as follows. When opening a tap in the energy carrier network, for example, Mon, Euronetwork, the remaining air enters the rear working cavity 4 through the annular channel 6 and the inlet channels 8 - to the lower working cavity 3, at the same time the device 12 to prevent movement the projectile in the opposite direction when it moves to the bottomhole comes into contact with the wall of the well or starting device (not shown). Under the pressure of compressed air and due to the fact that the area of the firing pin on the side of the front cavity 3 is larger than the area of the firing pin from the Flank of the back cavity, the firing pin begins to match the reciprocating movement. Initially, the drummer moves up and opens exhaust windows 7 on its way. Exhaust comes from the front cavity. Since the pressure in the rear working cavity is equal to the networked one and the exhaust in the front cavity, the drummer moves forward and strikes the front bottom of the body through the rolling pin 10 on the rock-breaking tool 11 placed on the rolling pin. At the same time, the rock is destroyed and is forced out into the cylindrical channel 9. In the zone of exhaust ports 7, the broken rock is picked up by compressed air and accelerated out of the well. Since the projectile is designed primarily for re-injection wells, the removal of the destroyed rock from the well is carried out efficiently. The use of the proposed projectile reduces the energy consumption of rock destruction. The invention has a non-striking percussion projectile for boreholes comprising a housing with working cavities, a drummer, a distributor nozzle, an inlet channel and a central channel for exhausting the energy carrier, a rock-breaking tool and a device for preventing projectile movement in the opposite direction, characterized in that in order to reduce the energy intensity of the destruction process and increase the efficiency of the removal of the destroyed rock from the bottom, the channel for the removal of the destroyed rock is made in the distribution pattern BKE. Sources of information taken into account in the examination 1. USSR author's certificate number 115474, cl. E 21 C 3/04, 1957. 2. Esin N.N. Submersible percussion machines for well drilling: Novosibirsk, Nauka, 1976, p. r4 (prototype).