CN2627194Y

CN2627194Y - Single cone bit waterpower arrangement

Info

Publication number: CN2627194Y
Application number: CN 03254445
Authority: CN
Inventors: 刘强; 许友斌; 况雨春
Original assignee: Kingdream PLC
Current assignee: Sinopec Oilfield Equipment Corp
Priority date: 2003-06-12
Filing date: 2003-06-12
Publication date: 2004-07-21
Anticipated expiration: 2013-06-12

Abstract

The utility model relates to a hydraulic structure of one-cone bit, which comprises a bit body, a cone and a hydraulic structure provided on the bit body. The utility model is characterized in that the hydraulic structure comprises an upper left water flow passage and an upper right water flow passage both arranged in the upper part of the bit body in a way that the upper left and right water flow passages are symmetrically at the two sides of the central plane of the bit body. The utility model has the advantages that the left and right water flow passages are formed in the upper part of the bit body, to reduce the swirling flow during the ejection of drilling fluid, to efficiently wash and cool the cone from the top to the bottom, and to increase the valid flow area of the drilling fluid; the loss of water impact energy is reduced, bottom rock debris is ensured to return to the earth surface in time, so as to avoid the repeated crushing of bottom rocks, thereby enhancing the drilling performance; and the lower water flow passage is adopted to increase the discharge of the drilling fluid, thereby meeting the requirements of large-discharge drilling operation and increasing the drilling rate of the one-cone bit.

Description

A kind of hydraulic structure of single gear wheel drilling bit

Technical field

The utility model relates to the single-cone rotary drill bit in a kind of oil, mine and geological drilling field, relates in particular to the hydraulic structure of single-cone rotary drill bit.

Background technology

Existing single-cone rotary drill bit is made of bit body (bit leg) and gear wheel, bit body is provided with hydraulic structure, hydraulic structure is made of the hydrophthalmia runner of offering in the bit body, be used for circulation and inject high pressure drilling fluid, so that shaft bottom and gear wheel are cleaned timely and cool off, remove the shaft bottom landwaste simultaneously it is taken the ground return face.The waterpower part of existing single-cone rotary drill bit mostly is upper and lower hydrophthalmia flow passage structure, and the center line of upper and lower hydrophthalmia runner all is positioned at bit body symmetrical centre plane, during rock bit work, because two crossing, phase mutual interference of hydrophthalmia liquid stream, this not only makes part water impact energy impaired, but also influence the clear bits performance in shaft bottom, it is broken to cause bottom rock to repeat, thereby influences the Drilling performance and the efficient of rock bit.

For addressing the above problem, designed a kind of hydraulic structure of single gear wheel drilling bit that deflection is carried out on the relative bit body symmetrical centre of hydrophthalmia runner plane of going up, this hydraulic structure makes the problem of the liquid stream phase mutual interference that upper and lower hydrophthalmia sprays be improved, but still have the disadvantage that swirling flow is big, area of passage is little, be difficult to adapt to the demand of big discharge capacity drilling well.

Summary of the invention

Technical problem to be solved in the utility model is to provide the hydraulic structure of single gear wheel drilling bit that a kind of swirling flow is little, area of passage is bigger at the deficiency of above-mentioned prior art existence, it can adapt to the demand of big discharge capacity drilling well, thereby improves the speed of creeping into of single-cone rotary drill bit.

The utility model is that the technical scheme that problem adopted of the above-mentioned proposition of solution is: comprise bit body 1 and gear wheel 2, bit body is provided with hydraulic structure, its difference is that described hydraulic structure is included in set last left hydrophthalmia runner 5 in bit body top and last right hydrophthalmia runner 4, goes up the both sides that left hydrophthalmia runner and last right hydrophthalmia runner lay respectively at bit body symmetrical centre plane.

By technique scheme, the described angle γ that goes up left eye runner center line and bit body symmetrical centre plane is 10 °～60 °, and the angle β that goes up right hydrophthalmia runner center line and bit body symmetrical centre plane is 10 °～60 °, and γ and β can be identical or inequality; For increasing area of passage, can in the axle journal of bit body bottom, offer hydrophthalmia runner 3 down.

The beneficial effects of the utility model are: 1, left and right two hydrophthalmia runners are offered on bit body top, can reduce swirling flow when drilling fluid sprays, and effectively wash from top to bottom and the cooling gear wheel, increase effective area of passage of drilling fluid; 2, reduced the loss of water impact energy, can make the shaft bottom landwaste in time return ground, avoided the repetition fragmentation of bottom rock, rock Drilling performance is further improved; 3, set up down the hydrophthalmia runner, drilling fluid displacement is increased, adapting to the demand of big discharge capacity drilling well, thereby improve the speed of creeping into of single-cone rotary drill bit.

Description of drawings

Fig. 1 is the positive view of an embodiment of the utility model.

Fig. 2 is the right view of bit body among Fig. 1.

Fig. 3 is the stereogram of bit body among another embodiment of the utility model.

Fig. 4 is the right view of bit body among Fig. 3.

The specific embodiment

Further specify embodiment of the present utility model below in conjunction with accompanying drawing.

First embodiment such as Fig. 1, shown in 2, include bit body 1 and gear wheel 2, the top of bit body offers left hydrophthalmia runner 5 and last right hydrophthalmia runner 4, upward left hydrophthalmia runner and last right hydrophthalmia runner are divided into the both sides on bit body symmetrical centre plane, the angle γ that goes up left hydrophthalmia runner and bit body symmetrical centre plane is 20 °～40 °, the angle β that goes up right hydrophthalmia runner center line and bit body symmetrical centre plane is 20 °～40 °, and γ=β, promptly go up left hydrophthalmia runner and last right hydrophthalmia runner is symmetrical, the rear end of going up left hydrophthalmia runner and last right hydrophthalmia runner all is conducted with the interior main water hole of bit body, the front end of going up left hydrophthalmia runner and last right hydrophthalmia runner is a water jet, be installed on nozzle 7 in the water jet, water jet is positioned on the angled end-face 6 of bit body middle and lower part, back corresponding to gear wheel, assurance is to the flushing of gear wheel, and avoids directly washing away the borehole wall.

Second embodiment of the present utility model is shown in Fig. 3,4, the main difference part of it and a last embodiment is to be provided with hydrophthalmia runner 3 down in the axle journal of bit body bottom, the water jet of following hydrophthalmia runner front end is positioned at the lower end of axle journal, the center line of following hydrophthalmia runner overlaps with the bit body center line of journal, the rear end of following hydrophthalmia runner is conducted by water-guiding hole and main water hole, constituting top two, one of below thus is the hydraulic structure of single gear wheel drilling bit of three hydrophthalmia runners altogether, can adapt to the demand of big discharge capacity drilling well.

Claims

1, a kind of hydraulic structure of single gear wheel drilling bit, comprise bit body and gear wheel, bit body is provided with hydraulic structure, it is characterized in that described hydraulic structure is included in set last left hydrophthalmia runner in bit body top and last right hydrophthalmia runner, go up the both sides that left hydrophthalmia runner and last right hydrophthalmia runner lay respectively at bit body symmetrical centre plane.

2, by the described hydraulic structure of single gear wheel drilling bit of claim 1, it is characterized in that the described angle γ that goes up left eye runner center line and bit body symmetrical centre plane is 10 °～60 °, the angle β that goes up right hydrophthalmia runner center line and bit body symmetrical centre plane is 10 °～60 °.

3,, it is characterized in that in the axle journal of bit body bottom, offering hydrophthalmia runner down by claim 1 or 2 described hydraulic structure of single gear wheel drilling bit.

4, by claim 1 or 2 described hydraulic structure of single gear wheel drilling bit, the angle γ that it is characterized in that left hydrophthalmia runner and bit body symmetrical centre plane is 20 °～40 °, the angle β that goes up right hydrophthalmia runner center line and bit body symmetrical centre plane is 20 °～40 °, and γ=β.

5, by the described hydraulic structure of single gear wheel drilling bit of claim 4, the rear end that it is characterized in that left hydrophthalmia runner and last right hydrophthalmia runner all with bit body in main water hole be conducted, the front end of going up left hydrophthalmia runner and last right hydrophthalmia runner is a water jet, be positioned on the angled end-face of bit body middle and lower part, corresponding to the back of gear wheel.

6, by the described hydraulic structure of single gear wheel drilling bit of claim 3, the water jet of hydrophthalmia runner front end is positioned at the lower end of axle journal under it is characterized in that, the center line of following hydrophthalmia runner overlaps with the bit body center line of journal.