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Down-the-hole hammer and components for a down-the-hole hammer, and a method of assembling a down-the-hole hammer

A down-the-hole hammer, the lowest technology, is applied in the wellbore driving device, earth-moving drilling, drilling equipment and other directions, which can solve the problems of expensive and expensive manufacturing.

Inactive Publication Date: 2012-09-05
SANDVIK INTELLECTUAL PROPERTY AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While this mid-chamber design reduces the distance the pressurized fluid must travel to reach the upper and lower chambers and act on the piston, this design necessitates complex machining of the housing to flow into the mid-chamber, which Makes it expensive to manufacture and since it is a wear part, it is also expensive to replace

Method used

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  • Down-the-hole hammer and components for a down-the-hole hammer, and a method of assembling a down-the-hole hammer
  • Down-the-hole hammer and components for a down-the-hole hammer, and a method of assembling a down-the-hole hammer
  • Down-the-hole hammer and components for a down-the-hole hammer, and a method of assembling a down-the-hole hammer

Examples

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Embodiment Construction

[0014] Figure 1A to Figure 1E A down-the-hole hammer 21 according to an embodiment of the present invention is shown in . The down-the-hole hammer 21 includes a housing 23 and a lowermost operating position in the housing ( Figure 1A ) and the top operating position ( Figure 1D ) between the piston 25 that moves, when in the lowermost operating position, the bottom end 27 of the piston hits the drill bit 29, and when in the uppermost operating position, the top end 33 partially defined by the housing and the piston The top chamber 31 has the smallest volume.

[0015] A recess 34 is provided between the piston 25 and the housing 33 such that the piston and housing define an intermediate chamber 35 between the top end 33 of the piston and the bottom end 27 of the piston. exist Figure 1A to Figure 1E In the preferred embodiment, the groove 34 is provided in the piston 25 . Figure 2A to Figure 2B Details of such a piston 25 are shown in . However, in other implementations...

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Abstract

A down-the-hole hammer includes a casing and a piston movable in the casing between a lowermost operating position and an uppermost operating position. A recess is provided between the piston and the casing so that the piston and the casing define an intermediate chamber between a top end of the piston and a bottom end of the piston. A passageway is provided between a source of pressurized fluid and the intermediate chamber such that, at all positions of the piston between the lowermost and the uppermost operating positions, the source of pressurized fluid is in flow communication with the intermediate chamber through the passageway. An opening in the piston at least partially defines the passageway.

Description

technical field [0001] The present invention relates to down-the-hole hammers and components for such hammers, and more particularly to a down-the-hole hammer having a central feed tube and a central DTH hammers and components for chambers. Background technique [0002] U.S. Patent No. 6,131,672 (which is incorporated by reference) discloses an impact down-the-hole hammer in which pressurized fluid is directed through the center of the piston and from the center of the piston to the The top or bottom of the piston. Pressurized fluid is held in the central feed tube until the port is opened, allowing the fluid to travel a distance to either the upper or lower chamber to act on the piston. While this design provides for a low cost outer housing that can direct air to the upper or lower chamber without complex machining, the air must travel a considerable distance to act on the piston. [0003] Other DTH hammer designs utilize an intermediate chamber formed on the outer diam...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B4/14
CPCE21B4/14E21B10/38
Inventor 马修·箫弗纳
Owner SANDVIK INTELLECTUAL PROPERTY AB