CN2558752Y

CN2558752Y - Tricone bit

Info

Publication number: CN2558752Y
Application number: CN 02242896
Authority: CN
Inventors: 涂小芳; 易楠辉; 徐延金; 涂能安; 敖锦生
Original assignee: YICHUN FEILONG BORE BIT MANUFACTURING Co Ltd JIANGXI PROV
Current assignee: YICHUN FEILONG BORE BIT MANUFACTURING Co Ltd JIANGXI PROV
Priority date: 2002-07-24
Filing date: 2002-07-24
Publication date: 2003-07-02
Anticipated expiration: 2012-07-24

Abstract

The utility model discloses a tricone bit, essentially consisting of a drilling bit jaw, a roller cone, an oiling plug, an oil cup cap, an elastic snap ring for hole, etc. The neck journal of the drilling bit jaw is provided with a floating sleeve and a neck journal groove, which is provided with a thread snap ring inside, is arranged under the floating sleeve; the drilling bit jaw and the roller cone are connected through the thread on the thread snap ring; an oil storage compensating mechanism over the drilling bit jaw adopts an elastic oil storage bag device instead of an oil storage bag of mental frame. After adopting the structure, surface contact between the drilling bit jaw and the roller cone replaces the point contact of steel balls, thereby improving wear resistance of the drilling bit jaw and the roller cone and greatly prolonging the service life of the drill; meanwhile, the elastic oil storage compensating mechanism endows the lubrication performance of the bearing with non-lag compensation. The utility model has long service life, good operation stability, high safety, simple structure, convenient application and has wide economical prospect and obvious social benefit.

Description

A kind of tricone bit

Technical field: the utility model relates to the rock bit that a kind of oil and geology department use, and particularly relates to a kind of tricone bit.

Background technology: what adopted in oil exploitation and geological prospecting department at present generally all is tricone bits, is that " a kind of two low nozzle carrier tricone bits " of zL95221168.8 and " a kind of rock bit bearing " that the patent No. is zL98228798.6 promptly are this as China Patent No..It is to adopt three tooth pawl assembly weldings to form, gear wheel is equipped with in tooth pawl bottom, cutting teeth is arranged on gear wheel, gear wheel is and then drill bit rotation on the one hand, on the other hand around the neck rotation of tooth pawl, gear wheel is in the process of tooth pawl neck rotation, the sliding bearing drive and the rotation that mainly are mounted on tooth pawl neck are moving, because monolateral bearing load of sliding bearing and friction, the wearing and tearing that bearing is paid are main causes that tricone bit lost efficacy, bearing is paid the generation that the gear wheel that often makes tricone bit after the wearing and tearing falls the well accident, simultaneously traditional store oil bucking-out system is used the store oil capsule that metallic framework is arranged, complex structure, itself does not send functional oil, rely on mud pressure to promote oil sac, lubrication oil is sent into bearing portion reach the lubricity compensation, in case the mud hole is blocked, this tooth pawl bucking-out system promptly lost efficacy, and this kind collocation structure seriously restricts drilling life of bit.

The utility model content: the utility model will provide exactly that sliding bearing is unlikely monolateral bearing load and friction between a kind of tooth pawl and the gear wheel, drill bit was lost efficacy, the bucking-out system of store oil simultaneously adopts simple in structure, have the elasticity store oil bucking-out system of sending functional oil again, make it reach the purpose of mandatory compensation.

A kind of tricone bit of the utility model is achieved like this: it comprises tooth pawl, gear wheel, oiling obstruction, seal, oil cup cap, the hole is with snap ring etc., axle journal position at the tooth pawl is provided with floating bushing, below axle journal, have the axle journal groove, and in the axle journal groove, be equiped with threaded screw thread snap ring, gear wheel flexibly connects by helicitic texture on the screw thread snap ring and tooth pawl, is provided with contractile elasticity store oil capsule on the top of tooth pawl, as the store oil bucking-out system.

The screw thread snap ring uses the 2-3 section to merge in the axle journal groove of forming the tooth pawl of packing into.

Elasticity store oil capsule adopts elastomeric material to make.

A kind of tricone bit of the utility model is provided with floating bushing between gear claw journal position bearing surface and roller axle bearing surface, utilize the flexibility of floating bushing, relaxed the uneven wear of tooth pawl bearing surface greatly, gear claw journal supporting capacity and abrasion resistance have been improved greatly, replace steel ball locking with the screw thread snap ring, the face contact has replaced some contact, the screw thread snap ring has reduced taking of gear wheel radial space simultaneously, the corresponding supporting capacity that improves cone shell, also improved the tooth pawl, the abrasion resistance of gear wheel, adopt screw thread snap ring locking mechanism to stop the possibility that whole gear wheel weighs down well generally speaking, even the screw thread snap ring is crushed into pieces, can guarantee that still gear wheel safety goes out well, increase substantially the security performance and the application life of drill bit; Adopt elasticity store oil capsule bucking-out system on the other hand, the store oil capsule that replaces former use metallic framework, because virgin metal skeleton store oil capsule complex structure, itself does not send functional oil, only rely on mud pressure to promote oil sac, lubrication oil is sent into bearing portion, compensation lags behind, in case and the mud hole plug, this tooth pawl bucking-out system lost efficacy immediately, the serious like this drilling life of bit that restricted, and adopt the utility model elasticity store oil capsule bucking-out system, under the double action of store oil capsule elastic contractile force and mud pressure, make the greasy property of bearing reach the forced compensation that does not have hysteresis, improved the application life of tricone bit widely, tool

Economic benefit is widely arranged.

Description of drawings: Fig. 1 is the utility model cross-sectional view.

Fig. 2 is screw thread snap ring 4 structural representations.

Fig. 3 is that Fig. 2 screw thread snap ring 4A-A is to schematic diagram.

Among Fig. 1,2: 1, tooth pawl, 2, gear wheel, 3, floating bushing, 4, the screw thread snap ring, 5, seal, 6, oiling is stopped up, and 7, elasticity store oil capsule, 8, oil cup cap, 9, snap ring, 10, axle journal groove is located at tooth pawl 1 axle journal below, i.e. floating bushing 3 bottoms, and screw thread snap ring 4 promptly is stuck in this annular groove; 11, cone groove, 12, oil filler point.

As shown in Figure 1, 2, 3, floating bushing 3 is overlapped on the axle journal of the tooth pawl 1 of packing into, the bottom of floating bushing 3 has axle journal groove 10 on tooth pawl 1 axle journal, 2 sections screw thread snap rings 4 are merged in the axle journal groove 10 on the tooth pawl 1 of packing into, seal 5 is inserted in the cone groove 11 on the gear wheel 2, inserts special-purpose pin in the oil filler point 12 before not loading onto filling oil plug plug 6, stops screw thread snap ring 4, rotate gear wheel 2 then, screw thread snap ring 4 is loaded; The store oil bucking-out system, be with elasticity store oil capsule 7, oil cup cap 8, the hole is overlapped on the tooth pawl 1 of packing into snap ring 9 successively, during oiling, first aperture from oil filler point 12 is screwed into exhaust tube and vacuumizes, make exhaust tube become petroleum pipeline by control valve, lubrication oil is pressed into elasticity store oil capsule 7 and oil cup cap 8 inner chambers and makes it to be full of, block the air vent of oil cup cap 8, remove oil pipe, oiling is stopped up 6 clog oil filler point 12, remove the stifled bar of the air vent on the oil cup cap 8 at last, check whole sealing system, as there is not a leakage, elasticity store oil capsule 7 promptly installs, it heaves pressure, be exactly the initial pressure of this tricone bit bearing oil, this store oil bucking-out system makes the greasy property of bearing reach the forced compensation of no hysteresis quality under the double action of elasticity store oil capsule 7 convergent forces and mud pressure, the utility model adopts above-mentioned this structure to improve the working life of tricone bit widely, show through the experiment use, its stable performance height, security performance is good, the performance of drill bit is greatly improved, has tangible economic benefit and remarkable social benefit.

Claims

1, a kind of tricone bit, comprise tooth pawl (1), gear wheel (2), (6) are stopped up in oiling, seal (5), oil cup cap (8), hole snap ring (9) etc., it is characterized in that: be provided with floating bushing (3) at the axle journal position of tooth pawl (1), below axle journal, have axle journal groove (10), and in axle journal groove (10), being equiped with threaded screw thread snap ring (4), gear wheel (2) flexibly connects by helicitic texture on the screw thread snap ring (4) and tooth pawl (1), is provided with contractile elasticity store oil capsule (7) as the store oil bucking-out system on the top of tooth pawl (1).

2, a kind of tricone bit according to claim 1 is characterized in that: screw thread snap ring (4) uses the 2-3 section to merge in the axle journal groove of forming on the tooth pawl (1) of packing into (10).

3, a kind of tricone bit according to claim 1 is characterized in that: elasticity store oil capsule (7) uses elastomeric material to make.