CN203285342U

CN203285342U - Inside-closed single-acting rotating type drill bit structure

Info

Publication number: CN203285342U
Application number: CN201320338745XU
Authority: CN
Inventors: 黄才启; 田波; 密士光; 孙晓东; 洪亚男; 丁传军; 朱颜彬; 何蕙岚; 王久全
Original assignee: TANGSHAN JINSHI SUPER ABRASIVE CO Ltd; No325 Geological Team Of Anhui Bureau Of Geology And Mineral Exploration
Current assignee: TANGSHAN JINSHI SUPER ABRASIVE CO Ltd; No325 Geological Team Of Anhui Bureau Of Geology And Mineral Exploration
Priority date: 2013-06-14
Filing date: 2013-06-14
Publication date: 2013-11-13
Anticipated expiration: 2023-06-14

Abstract

The utility model relates to an inside-closed single-acting rotating type drill bit structure, and belongs to the technical field of geological rock core drilling in a coal field. According to the technical scheme, the inside-closed single-acting rotating type drill bit structure comprises a rock core inner tube (1), a drill bit (2), a single-acting rotating clamping spring seat (3), a single-acting rotating bearing (4) and an enhancing outer water opening (5). The drill bit is arranged at the end of the rock core inner tube, the rock core inner tube is provided with the single-acting rotating clamping spring seat, the single-acting rotating bearing is arranged at the end of the single-acting rotating clamping spring seat, and the enhancing outer water opening is formed between the single-acting rotating bearing and the drill bit. The inside-closed single-acting rotating type drill bit structure has the advantages that a closed structure capable of rotating in a single moving mode is arranged in the drill bit, flushing of flushing fluid to a carved rock core is isolated, meanwhile, the drill bit is separated from an inner tube system in a single-acting mode, the rock core can be better protected to enter the rock core inner tube smoothly, a secondary rock core protecting effect is achieved, the success rate of picking loose and irregular rock cores is greatly improved, and particularly the effect for sampling loose rock cores in coal measure strata is better.

Description

A kind of inner sealing single action rotary bit structure

Technical field

The utility model relates to a kind of inner sealing single action rotary bit structure, belongs to the coal field geology core and creeps into technical field.

Background technology

At present, coal field geology core drilling construction is the traditional core plugging notifying mechanism of rope core drilling of application, and drill bit structure is common Outlet Forms, and flushing liquor is discharged from the bottom of drill bit through the gap between inner and outer pipes, clip spring seat, after washing away rock core.In actual drilling process, the coal seam core is washed away terribly, some even washes away powdery coal seam core fully, can not complete core sampling at all.

The utility model content

The utility model purpose is to provide a kind of inner sealing single action rotary bit structure, and by the sealing to the drill bit inner lead, the minimizing flushing liquor washes away rock core, improves the taking rate of rock core, solves the problem that above background technology produces.

Technical solutions of the utility model are:

A kind of inner sealing single action rotary bit structure, comprise core inner tube, drill bit, single action revotating card spring abutment, single action swivel bearing and strengthen the outer mouth of a river, core inner tube lower end arranges single action revotating card spring abutment, the lower end of single action revotating card spring abutment arranges the single action swivel bearing, the single action swivel bearing is arranged on the drill bit inside bottom, and drill bit bottom and arranged outside strengthen the outer mouth of a river.

The bottom of described single action revotating card spring abutment is provided with the sealing chamfering, and single action swivel bearing top also is provided with the sealing chamfering that matches; The single action swivel bearing makes drill bit separate with interior guard system, forms relative single action rotation.After inner tube assembly put in place, the sealing chamfering on the sealing chamfering of the bottom of single action revotating card spring abutment and single action swivel bearing top coupling was closed, blocked the inboard flushing liquor path of drill bit, and water mouth of a river outside drill bit strengthens is flowed out.

Described single action swivel bearing is positioned at the drill bit inside bottom; The single action swivel bearing is the pressure bearing structure.

The beneficial effects of the utility model are: creep into soft coal level for coal field geology and get core; drill bit strengthens outer gate structure; reduce the pressure of drill bit position flushing liquor, thereby alleviate flushing liquor to the washing away of ravelly ground position, be beneficial to the protection drill bit and carve the rock stratum of getting position.Drill bit built-in can single action the enclosed construction of rotation; cut off flushing liquor washing away the core got quarter; simultaneously drill bit is separated with interior guard system single action; be beneficial to the protection core and enter smoothly the core inner tube; play the effect of second protection core; improved greatly the success rate of taking of loose irregular core, especially the loose core sample effect of coal measure strata is better.

Description of drawings

Accompanying drawing 1 is the utility model example structure schematic diagram;

In figure: core inner tube 1, drill bit 2, single action revotating card spring abutment 3, single action swivel bearing 4, the outer mouth of a river 5 of enhancing, sealing chamfering 6.

The specific embodiment

, below in conjunction with accompanying drawing, by embodiment, the utility model is described further.

A kind of inner sealing single action rotary bit structure, comprise core inner tube 1, drill bit 2, single action revotating card spring abutment 3, single action swivel bearing 4 and strengthen the outer mouth of a river 5, core inner tube lower end arranges single action revotating card spring abutment, the lower end of single action revotating card spring abutment arranges the single action swivel bearing, the single action swivel bearing is arranged on the drill bit inside bottom, and drill bit bottom and arranged outside strengthen the outer mouth of a river.

The bottom of described single action revotating card spring abutment is provided with sealing chamfering 6, and single action swivel bearing top also is provided with the sealing chamfering that matches; The single action swivel bearing makes drill bit separate with interior guard system, forms relative single action rotation.After inner tube assembly put in place, the sealing chamfering on the sealing chamfering of the bottom of single action revotating card spring abutment and single action swivel bearing top coupling was closed, blocked the inboard flushing liquor path of drill bit, and water mouth of a river outside drill bit strengthens is flowed out.

Adopt the utility model, when bit is carved while getting the soft coal level core, the sealing of drill bit inner lead, flushing liquor flows out through the outer mouth of a river of the enhancing of drill bit, strengthened simultaneously strengthen the outer mouth of a river circulation flow path.Hold close contact between the single action revotating card spring abutment of inner tube assembly of core and drill bit, and form relative motion between single action revotating card spring abutment and drill bit, drill bit and inner tube assembly relatively rotate.

In normal drilling construction process, bit is carved coring, and flushing liquor is closed the loose core isolation of system and coal seam, and enters the annular gap of drilling rod and boring by strengthening outer flowing flux; Owing to establishing single action mechanism in drill bit, while normally creeping into, although single action revotating card spring abutment contacts with drill bit rigid body inwall, interior guard system is not with bit, thereby the protection core can enter the core inner tube smoothly.

Claims

1. inner sealing single action rotary bit structure, it is characterized in that: comprise core inner tube (1), drill bit (2), single action revotating card spring abutment (3), single action swivel bearing (4) and strengthen the outer mouth of a river (5), the end of core inner tube arranges drill bit, single action revotating card spring abutment is set on the core inner tube, the end of single action revotating card spring abutment arranges the single action swivel bearing, arranges between single action swivel bearing and drill bit and strengthens the outer mouth of a river.

2. a kind of inner sealing single action rotary bit structure according to claim 1 is characterized in that: the bottom of described single action revotating card spring abutment is provided with sealing chamfering (6), and single action swivel bearing top also is provided with the sealing chamfering that matches.

3. a kind of inner sealing single action rotary bit structure according to claim 1 and 2, it is characterized in that: described single action swivel bearing is positioned at the drill bit inside bottom; The single action swivel bearing is the pressure bearing structure.