CN201068732Y

CN201068732Y - Air percussion hammer for well drilling

Info

Publication number: CN201068732Y
Application number: CNU2007200038502U
Authority: CN
Inventors: 陈若铭; 罗良波; 侯玉琦
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: 2008-06-04
Anticipated expiration: 2017-01-30

Abstract

The utility model relates to an air percussion hammer used for well drilling in the oil-gas field. An upper contact, an outside cylinder, a lower contact and a drill head are connected in sequence, the inner cavity of the outside cylinder is provided with a lug boss and a flute, a supporting seat is sleeved on a center tube and is positioned by the lug boss of the outside cylinder. The center tube is of a stepped cylinder shape, the inner cavity is provided with stepped holes, the middle-upper part of the center tube is provided with a plurality of inclined through holes which cause the inner cavity of the center tube to be communicated with the annular space of the center tube and the upper contact, two straight holes are arranged at the lower part of the center tube, and a flow recombined piston is installed at the lower end of the inner cavity of the center tube. Rubber pads are arranged on the matching position among the center tube, the upper contact and the supporting seat. The piston is sleeved on the center tube. A plurality of axial grooves are arranged at the upper and the lower ends of the outer surface of the piston, and the grooves at the upper and the lower ends are processed in a certain angle in the stagger way. The stepped holes which are big for the upper part and small for the lower part are arranged in the inner cavity of the piston, two radial annular grooves are arranged in the inner cavity of the piston, and radial holes are arranged on a corresponding piston of the radial annular grooves so that the radial annular grooves are communicated with the axial grooves on the outer surface of the piston. The utility model is sent into the bottom of a well by connecting a drilling string, under the function of the air pressure, the piston reciprocates to impact the drill head, thereby realizing the well drilling work.

Description

A kind of drilling well air percussion 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 main problem that exists is that the air hammer consumable accessory is many, difficulty of processing is big, and efficiency of breaking rock is low during use, the air hammer life-span short, has influenced the application of air hammer in oil gas drilling.

Summary of the invention

The purpose of this utility model is to provide a kind of drilling well air percussion hammer, 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 upper and lower joint 1,11 respectively, and lower contact 11 is connected with drill bit 12.Urceolus 2 inner chambers are processed with boss and groove, and supporting seat 7 is sleeved on the central tube 8 and is positioned at the boss place of urceolus 2; Central tube 8 is the ladder barrel shape, its inner chamber is processed with shoulder hole, in central tube 8 middle and upper parts some oblique through holes is arranged, and makes the central tube inner chamber form annular space with central tube and top connection and is connected, be processed with 2 straight holes in central tube 8 bottoms, central tube 8 inner chamber lower ends are equipped with flow allocating plug 10; Central tube 8 all is equipped with rubber pad 5,6 with the cooperation place of top connection 1 and supporting seat 7; Piston 9 is sleeved on the central tube 8; Piston 9 external surface upper and lower ends are processed with some roads axial groove respectively, and the groove of the upper and lower end processing of staggering at an angle, piston 9 inner chambers are up big and down small shoulder hole, be processed with radially annular groove of 2 roads at piston 9 inner chambers, all be processed with radial hole at annular groove correspondence position radially, this hole makes radially that annular groove is communicated with the axial groove of piston 9 external surfaces.

The utlity model has simple in structurely, be convenient to the characteristics 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 upper and lower joint 1,11 respectively, and lower contact 11 is connected with drill bit 12.Urceolus 2 inner chambers are processed with boss and groove, and supporting seat 7 is sleeved on the central tube 8 and is positioned at the boss place of urceolus 2; Central tube 8 is the ladder barrel shape, its inner chamber is processed with shoulder hole, in central tube 8 middle and upper parts some oblique through holes is arranged, and makes the central tube inner chamber form annular space with central tube and top connection and is connected, be processed with 2 straight holes in central tube 8 bottoms, central tube 8 inner chamber lower ends are equipped with flow allocating plug 10; Central tube 8 all is equipped with rubber pad 5,6 with the cooperation place of top connection 1 and supporting seat 7; Piston 9 is sleeved on the central tube 8; Piston 9 external surface upper and lower ends are processed with some roads axial groove respectively, and the groove of the upper and lower end processing of staggering at an angle, piston 9 inner chambers are up big and down small shoulder hole, be processed with radially annular groove of 2 roads at piston 9 inner chambers, all be processed with radial hole at annular groove correspondence position radially, this hole makes radially that annular groove is communicated with the axial groove of piston 9 external surfaces.

The action principle of air hammer: air hammer connects in company with drill string sends into the shaft bottom, under the air pressure effect, open non retern valve 3 and enter central tube 8 inner chambers through central tube 8 inclined holes, and the groove that pressure-air enters the radially annular groove at piston 9 inner chambers middle parts and hole and piston 9 external surface lower ends by 2 straight holes in central tube 8 bottoms 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 the radially annular groove of piston 9 inner chamber bottoms by 2 straight holes in central tube 8 bottoms and the groove of hole and piston 9 external surfaces upper end enters piston 9 tops, pressure-air no longer enters the airtight high pressure chest on piston 9 bottoms and drill bit top, simultaneously, form airtight high pressure chest on piston 9 tops and 2 of urceolus, 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 descending drill hammer under the pressure effect of the airtight high pressure chest of piston 9 middle parts and 2 formation of urceolus, thereby the broken rock in drill bit impact stratum creeps into, descent of piston is to certain position, the groove that pressure-air enters the radially annular groove at piston 9 inner chambers middle parts and hole and piston 9 external surface lower ends by 2 straight holes in central tube 8 bottoms 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, so move in circles, broken rock creeps into.

Claims

1. drilling well air percussion hammer, urceolus (2) two ends are connected with upper and lower joint (1,11) respectively, lower contact (11) is connected with drill bit (12), it is characterized in that: urceolus (2) inner chamber is processed with boss and groove, and supporting seat (7) is sleeved on the boss place that urceolus (2) was gone up and be positioned to central tube (8); Central tube (8) is the ladder barrel shape, its inner chamber is processed with shoulder hole, in central tube (8) middle and upper part some oblique through holes are arranged, making the central tube inner chamber form annular space with central tube and top connection is connected, be processed with 2 straight holes in central tube (8) bottom, central tube (8) inner chamber lower end is equipped with flow allocating plug (10); Central tube (8) all is equipped with rubber pad (5,6) with the cooperation place of top connection (1) and supporting seat (7); Piston (9) is sleeved on the central tube (8); Piston (9) external surface upper and lower end is processed with some roads axial groove respectively, and the groove of the upper and lower end processing of staggering at an angle, piston (9) inner chamber is up big and down small shoulder hole, be processed with radially annular groove of 2 roads at piston (9) inner chamber, all be processed with radial hole at annular groove correspondence position radially, this hole makes radially that annular groove is communicated with the axial groove of piston (9) external surface.