CN201016271Y

CN201016271Y - Pneumatic hammer for well drilling

Info

Publication number: CN201016271Y
Application number: CNU2007200038536U
Authority: CN
Inventors: 罗良波; 侯玉琦; 李晓军
Original assignee: Drilling Technology Research Institute of Xinjiang Petroleum Administration
Current assignee: Karamay Drilling Technology Institute of CNPC Western Drilling Engineering Co Ltd
Priority date: 2007-01-30
Filing date: 2007-01-30
Publication date: 2008-02-06
Anticipated expiration: 2017-01-30

Abstract

The utility model discloses an air hammer for oil and gas drill well. Two ends of the outer barrel are connected to an upper and lower adaptor respectively, the lower adaptor is connected to a drill bit, and the inner chamber of the outer barrel is the stair-stepping shape. The cylinder liner is positioned in the inner chamber of the outer barrel, the upper end is located at the step of the check valve seat, and the lower end is located at the step of the inner chamber of the outer barrel. The upper adaptor is equipped with a plurality of through holes, and a disc spring group is positioned between the upper adaptor and the check valve seat. A piston is arranged inside the cylinder liner, the outer surface of the cylinder liner is equipped with two or four non-communicating flat channels symmetrically, and the radial through holes are positioned at the corresponding locations of the flat channel. The upper and lower appropriate location at the outer surface of piston are equipped with two non-communicating ring-shaped grooves, and the upper end of the piston is equipped with a plurality of axial holes for communicating the space between the piston and the check valve seat to the upper groove of the piston. The utility model is sent to the bottom of the drill well by the drill string, the drill bit is shocked by the upward and downward movement under the role of the air pressure, thereby achieving the rock-breaking and drilling operations.

Description

A kind of drilling well air hammer

Technical field

The utility model is applied to the broken rock of air drilling and creeps into operation, belongs to drilling tool.

Background technology

At present, the air hammer of using in oil gas well drilling still is the air hammer of other sector application, because the particularity of oil gas drilling, above-mentioned air hammer can not satisfy the needs that oil gas well drilling is used, the application life that the main problem that exists is an air hammer is short, be in particular in that the garden cylindricality steel wire shock-absorbing spring in the air hammer ruptures easily, cylinder sleeve and piston space are because the wearing and tearing of solid particle, make its seal failure, influence the application of air hammer in oil gas drilling, and existed problems such as tool construction complexity, requirement on machining accuracy height.

Summary of the invention

The air hammer that provides a kind of oil/gas drilling to use is provided the purpose of this utility model, and it is simple in structure, be easy to processing and manufacturing.

The technical solution of the utility model is as follows: urceolus 2 two ends are connected with top connection 1, lower contact 11 respectively, lower contact 11 is connected with drill bit 12, urceolus 2 inner chambers are stepped, cylinder jacket 6 is contained in the inner chamber of urceolus 2, its upper end is positioned the step of check valve seat 5, and the lower end is positioned the step of urceolus 2 inner chambers; Top connection 1 has some radial direction through hole, and dish spring group 4 is housed between top connection 1 and the check valve seat 5; Piston 9 is housed in the cylinder jacket 6, and cylinder jacket 6 external surfaces are symmetrically distributed with mutually disconnected rising as high as the banks of two or four roads, and the correspondence position of rising as high as the banks is processed with radial direction through hole; There are disconnected two road annular grooves mutually the appropriate location of piston 9 external surface upper and lower ends, and in piston 9 upper ends several axial holes 10 is arranged, and piston 9 is communicated with the low groove of piston 9 with the space of check valve seat 5.

The utlity model has simple in structure, usage operation is reliable, is convenient to the advantage of processing and manufacturing.

Description of drawings

Fig. 1 is the utility model structural representation

The specific embodiment

The utility model is described in more detail below in conjunction with accompanying drawing.

As shown in Figure 1, urceolus 2 two ends are connected with top connection 1, lower contact 11 respectively, and lower contact 11 is connected with drill bit 12, urceolus 2 inner chambers are stepped, cylinder jacket 6 is contained in the inner chamber of urceolus 2, and its upper end is positioned the step of check valve seat 5, and the lower end is positioned the step of urceolus 2 inner chambers; Top connection 1 has some radial direction through hole, and dish spring group 4 is housed between top connection 1 and the check valve seat 5; Piston 9 is housed in the cylinder jacket 6, and cylinder jacket 6 external surfaces are symmetrically distributed with mutually disconnected rising as high as the banks of two or four roads, and the correspondence position of rising as high as the banks is processed with radial direction through hole; There are disconnected two road annular grooves mutually the appropriate location of piston 9 external surface upper and lower ends, and in piston 9 upper ends several axial holes 10 is arranged, and piston 9 is communicated with the low groove of piston 9 with the space of check valve seat 5.

Drilling well is with the operating principle of air hammer: air hammer connects in company with drill string sends into the shaft bottom, pressure-air is opened non retern valve 3 under pressure and is entered rising as high as the banks and radial direction through hole of cylinder jacket 6 external surfaces upper end through top connection 1 bottom radial hole, through rising as high as the banks and radial direction through hole of piston 9 external surface upper grooves and cylinder jacket 6 external surface lower ends, pressure-air enters the annular space on piston 9 bottoms and drill bit 12 tops, form airtight high pressure chest, thereby it is up to promote piston 9, when piston 9 is up to certain position, pressure-air enters piston 9 external surface low grooves through rising as high as the banks of cylinder jacket 6 external surfaces upper end with radial direction through hole and hole 10 enters piston 9 tops, pressure-air no longer enters the airtight high pressure chest on piston 9 bottoms and drill bit top, the inner chamber of piston 9 is inserted in check valve seat 5 central tube bottoms simultaneously, form airtight high pressure chest on piston 9 tops and 6 of cylinder jacket, along with piston stroking upward, the passage of piston 9 bottoms and drill bit 12 is opened, the air on piston 9 bottoms and drill bit 12 tops is discharged by drill bit 12 endoporus, piston 9 is at the airtight high pressure chest of piston 9 tops and 6 formation of cylinder jacket, descending under pressure drill hammer, thereby the broken rock in drill bit impact stratum creeps into, descent of piston is to certain position, pressure-air enters the annular space on piston 9 bottoms and drill bit 12 tops by the radial direction through hole of piston 9 external surface upper grooves and cylinder jacket 6 external surface lower ends with rising as high as the banks again, form airtight high pressure chest, thereby it is up to promote piston 9, so move in circles, broken rock creeps into.

Claims

1. drilling well air hammer, urceolus (2) two ends are connected with top connection (1), lower contact (11) respectively, lower contact (11) is connected with drill bit (12), it is characterized in that: urceolus (2) inner chamber is stepped, cylinder jacket (6) is contained in the inner chamber of urceolus (2), its upper end is positioned the step of check valve seat (5), and the lower end is positioned the step of urceolus (2) inner chamber; Top connection (1) has some radial direction through hole, between top connection (1) and the check valve seat (5) dish spring group (4) is housed; Piston (9) is housed in the cylinder jacket (6), and cylinder jacket (6) external surface is symmetrically distributed with mutually disconnected rising as high as the banks of two or four roads, and the correspondence position of rising as high as the banks is processed with radial direction through hole; There are disconnected two road annular grooves mutually the appropriate location of piston (9) external surface upper and lower end, and in piston (9) upper end several axial holes (10) is arranged, and piston (9) is communicated with the low groove of piston (9) with the space of check valve seat (5).