SU1599511A1 - Pulsation-pumping hydraulic hammer - Google Patents

Abstract

The invention relates to the drilling of wells and is intended for downhole drilling machines of rotary percussion drilling. The goal is to increase the efficiency of the hydraulic hammer by providing a closed circulation of the working fluid. For this purpose, a valve assembly with inlet and outlet valves and a radial channel for communication of the valve cavity with the outside space is located in the housing under the anvil. Impact site is made in the form of a drive plunger, a stem located below it and attached to the stem spring-loaded relative to the body of the plunger-drummer. The latter is made with an axial channel in which the check valve is located. The attachment of the anvil to the body is made in the form of a spline joint. The check valve of the plunger-impactor and the inlet valve of the valve assembly are installed with the possibility of communication between the cavity under the plunger and the cavity of the valve assembly with the central channel made in the anvil 3. Under the action of the next pulse, the drive plunger and plunger-hammer move downward above the anvil, while striking the anvil with the plunger-drummer. Thus, the hydraulic hammer is at the same time a submersible pump, which creates a bottomhole circulation in the case of the connection of the hammer with the bit. 1 il.

Description

The invention relates to the drilling of wells, namely to downhole drilling machines for percussive drilling.

The purpose of the invention is to increase the efficiency of the hydraulic hammer by providing a closed circulation of the working fluid.

The drawing shows a pulsating and pumping hydraulic hammer.

The pulsating-pumping hydraulic hammer comprises a housing in the form of a cylinder 1. In the latter, it is secured with a sealed spline connection 2 of the anvil 3 with the possibility of movement. Anvil 3 is made with a central channel 4. Above the anvil 3 is located

shock knot. The latter is made in the form of a drive plunger 5, a stem 6 located under it and fixed to the stem 6 spring-loaded relative to the body of the plunger-hammer 7. The latter is made with an axial channel 8 in which a check valve 9 is located. In valve body 1 pacno.no 10 under the anvil 3. The valve assembly is made with a cavity 11 and a radial channel 12 arranged to communicate the cavity 11 with the outer space. Above the cavity 11, the inlet valve 13 is installed, and under the cavity - the exhaust valve 14.

The device works as follows.

When you turn on the drummer in the work of the bushes

Bottomhole circulation in the case of the connection of a hammer with a chisel and a hydraulic hammer that creates m and transmits shock impulses to the rock-breaking tool g without additional drilling fluid flow.

Claims (1)

The invention The pulsation-pumping hydraulic hammer, with liquid, displaces the drive plunger I jerger 5, moving it and the pumping plunger-hammer 7 and the associated spring connected to it with the I rod 6, compressing the operating spring placed on the brush between the support rings. The pump plunger-hammer 7, when it moves down, displaces the fluid from the cavity above the anvil into the valve assembly 10. Torque to the anvil 3 is transmitted through splice connection 2. The axial load is transmitted through the body Yu holding the body in the form of a cylinder, fastened I 1 directly to the anvil 3. When the anvil is salted in the cylinder with the possibility of touching the body 1 with the anvil 3 it is possible to move and the impact unit, I last is in the uppermost position above the anvil, distinguished by I position. At the time of the impact of the plunger, the impact of the fact that, in order to increase the effect: 7, on the anvil 3, the work of the hydraulic shock is shifted by desaturation of the closed circulation of the working fluid. During the reverse course of the plunger-hammer 7 liquid, it is equipped with a valve assembly and the plunger 5 under the action of the working spring-located in the housing under the anvil and force from the hydrostatic pressure, with the inlet and located under it laziness of the annular column of the flushing fluid-discharge valves, and the radial canal: the bone transferred through the suction 20 scrap to communicate the valve cavity with ; the channels on the lower end of the plunger 7, fluid-outer space, and the shock node : the bone above the plunger 5 is displaced into qi — made in the form of a driving plunger, lindr mud pump. In this case, the stem located underneath it and the anvil 3 fastened to the anvil 3 is filled out of the external plunger-piston body with an autumn valve 13, i.e. there is a cycle of the all-channel channel and located in the channel reversing the valve, and fixing the anvil Under the action of the next impulse of the plunger to the body is made in the form of slotters 5 and 7 are moved downward, the displacement joint, and the check valve ; into the outer space of the fluid from the plunger-drummer and inlet valve cavities above the anvil 3, with the simultaneous Q valve assembly installed with the possibility of an impact by a plunger-impact of the cavity : com 7 on the anvil 3. plunger and the cavity of the valve assembly with ; Thus, the device is a single-center channel, made at the same time by a submersible pump, creating a main. Bottomhole circulation in the case of the connection of a hammer with a chisel and a hydraulic hammer, which create m and transmit shock impulses to the rock-breaking tool without additional consumption of drilling fluid. The invention The pulsatory pumping hammer, comprising a cylinder-shaped body, fixed