CN201016270Y

CN201016270Y - Outer pneumostome type drilling pneumatic hammer

Info

Publication number: CN201016270Y
Application number: CNU2007200038521U
Authority: CN
Inventors: 罗良波; 侯玉琦; 宁世品
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 external breathing hole type air hammer for drill well, two ends of the outer barrel (2) are connected to an upper adaptor (1) and a lower adaptor (6) respectively, and the lower adaptor is connected to a drill bit (7). The middle part of the inner chamber of the outer barrel (2) is equipped with a boss, the boss is equipped with a ring-shaped slot, and the ring-shaped slot is communicated to a plurality of radial breathing holes on the same boss. A piston (3) is the cylinder shape of big end down, the small end of the piston (3) is inserted into the inner cavity of the upper adaptor (1), the top of the big end of the piston (3) is equipped with a plurality of radial grooves, the appropriate location at the middle part is equipped with a ring-shaped groove which communicates to the central hole of the piston (3) by a plurality of inclined holes, the outer diameter of the big end of the piston (3) is fit to the boss of the outer barrel (2), and the lower end of the central hole of the inner chamber of the piston (3) is connected to a flow regulating valve (5). 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

External respiration cellular type drilling well air hammer

Technical field

The utility model is applied to the broken rock of oil gas field 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, is in particular in that the cylindrical steel wire shock-absorbing spring that adopts in such air hammer ruptures easily, and because the wearing and tearing of solid particle, cause cylinder sleeve and piston space seal failure easily, influenced the application of air hammer in oil gas field probing and exploitation.

Summary of the invention

The purpose of this utility model is to provide outer a kind of breathing cellular type drilling well air hammer, solves that present air hammer exists because the air hammer short problem in application life that spring breakage and seal failure etc. cause.

A kind of external respiration cellular type drilling well air hammer, urceolus 2 two ends are connected with top connection 1, lower contact 6 respectively, lower contact 6 is connected with drill bit 7, the inner chamber medium position of urceolus 2 is processed with boss, be processed with a cannelure in lug boss position, this cannelure is connected with the some radially spiracles that are in lug boss position together; Piston 3 is up-small and down-big cylindric, the small end of piston 3 stretches into the inner chamber of top connection 1, the top of piston 3 big ends is processed with some axial notches, be processed with an annular groove in the appropriate location, middle part, and communicate with the centre bore of piston 3 by the some inclined holes on the piston 3, the boss of piston 3 big end external diameters and urceolus 2 is suitable, and lower end, piston 3 lumen centers hole is connected with flow adjustment valve 5.

The urceolus that the utility model utilization has a spiracle directly cooperates with piston and need not to adopt interior cover, can effectively reduce wearing and tearing, do not need to install the damping spring of easy generation fracture in addition in this structure design, effectively increased the application life of air hammer, simultaneously, the utlity model has simple in structurely, reliable in action is convenient to 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 6 respectively, and lower contact 6 is connected with drill bit 7, and the inner chamber medium position of urceolus 2 is processed with boss, be processed with a cannelure in lug boss position, this cannelure is connected with the some radially spiracles that are in lug boss position together; Piston 3 is up-small and down-big cylindric, the small end of piston 3 stretches into the inner chamber of top connection 1, the top of piston 3 big ends is processed with some axial notches, be processed with an annular groove in the appropriate location, middle part, and communicate with the centre bore of piston 3 by the some inclined holes on the piston 3, the boss of piston 3 big end external diameters and urceolus 2 is suitable, and lower end, piston 3 lumen centers hole is connected with flow adjustment valve 5.

Operating principle of the present utility model: the utility model is sent into the shaft bottom in company with the drill string connection, pressure-air is by the centre bore and the piston 3 of top connection 1) centre bore enters the annular space on piston 3 bottoms and drill bit 7 tops through the inclined hole at the central slot places of the big end of piston 3, form airtight high pressure chest, thereby it is up to promote piston 3, when piston 3 is up to certain position, the external diameter that is piston 3 big ends is blocked the outer cylinder diameter at the boss place of urceolus 2 to spiracle, pressure-air can not continue to enter piston 3 bottoms, but when the effect lower piston 3 of gases at high pressure expansion work continues to be up to certain position, pressure-air enters piston 3 tops through the inclined hole at the central slot place of piston 3 big ends, form airtight high pressure chest on piston 3 tops and 2 of urceolus, simultaneously along with piston stroking upward, the passage of piston 3 bottoms and drill bit 7 is opened, the air on piston 3 bottoms and drill bit 7 tops is discharged by drill bit 7 endoporus, piston 3 is descending drill hammer under the pressure effect of the airtight high pressure chest of piston 3 tops and 2 formation of urceolus, thereby the broken rock in drill bit impact stratum creeps into, piston 3 goes downwards to certain position, be when the upper limb of annular grooves comes downwards to urceolus 2 boss places in the middle part of the piston 3 big ends, pressure-air can not continue to enter piston 3 tops, but the effect lower piston 3 in the gases at high pressure expansion work continues to go downwards to certain position, pressure-air enters the annular space on piston 3 bottoms and drill bit 7 tops through the inclined hole at the central slot place of piston 3 big ends, form airtight high pressure chest, thereby it is up to promote piston 7, the pressure-air on piston 3 tops is discharged through the radially spiracle at urceolus 2 boss places simultaneously, so move in circles, broken rock creeps into.

Claims

1. external respiration cellular type drilling well air hammer, urceolus (2) two ends are connected with top connection (1), lower contact (6) respectively, lower contact (6) is connected with drill bit (7), it is characterized in that: the inner chamber medium position of urceolus (2) is processed with boss, be processed with a cannelure in lug boss position, this cannelure is connected with the some radially spiracles that are in lug boss position together; Piston (3) is up-small and down-big cylindric, the small end of piston (3) stretches into the inner chamber of top connection (1), the top of the big end of piston (3) is processed with some axial notches, be processed with an annular groove in the appropriate location, middle part, and communicate by the centre bore of the some inclined holes on the piston (3) with piston (3), piston (3) holds the boss of external diameter and urceolus (2) suitable greatly, and lower end, piston (3) lumen centers hole is connected with flow adjustment valve (5).