CN2104925U - Bit of gear wheel - Google Patents

Abstract

The utility model discloses the improvement of a three-roller cone bit. The teeth of the roller cone are processed to be arced teeth, and after a bearing and the teeth are processed with heat, the bearing and the teeth are coated with diamond powder. Holes are drilled on teeth claws, and liquid flow speed reducing plates are arranged at the holes to form a circulation system that a parallel bearing straightens in the low pressure and the lubricated diamond cleans a friction pair; a liquid flow sensor is also adopted as a fall-prevention roller-cone indicator. A hole which has a small angle and inclines downward is drilled on the teeth claw to generate an aspiration sand-prevention plug to keep the tiny thickness of the channel and the positions which are easy to wear. The thickness decreases, which represents that the bit is discarded. The utility model has a simple structure and abolishes an oil-storage system and a sealing device. The three-roller cone bit can replace the bits of various model numbers to adapt to the drilling of the strata which alternate to be soft and hard.

Description

Bit of gear wheel

The utility model relates to the improvement of oil drilling with tricone bit.

Along with the continuous development of drilling technology in recent years, the tricone bit technology progressively strides forward to multi-functional, an urgent demand high efficiency, long-life; Jet changes artificial automatic adjusting flow with the shaft bottom process condition; The not breakthrough of three big technology such as lost cone after the use.

The state of the art of tricone bit:

1, embody longer life, being the metal covering sealing of Hughes Electronics invention and surpassing the top scoop chisel insert of greater efficiency, can improve about life-span and efficient 0.3-1 times, and then Smith company develops truncation garden awl diamond bearing and based on the diamond coatings tooth (or hot pressing tooth) of carbide alloy, it is said and improve 10 times of life-spans than plain bearing drill bit, (" oil new technology information " the 1st phase of December nineteen ninety, science and technology equipment association of Chinese Petroleum Society (CPS) compiles), but because company such as Smith does is the coating of (or hot pressing tooth) on the basis of carbide alloy, profile of tooth still is that the garden column is through being fixed on behind the insert on the gear wheel shell, first complex process, cost are too high; Second still can not bring into play the profile of tooth advantage; The 3rd can not exclude, the broken teeth phenomenon.Axle journal adopts truncated cone type coating, freely cool off, superhard material coating on the lubricious bearing, so poor stability, difficulty of processing is big, and is also poor to the cooling of axle, lubricious reliability, and foul or foreign particle are difficult in time getting rid of in the hole, particularly diadust is as coating, and transient temperature is greater than 650 ℃ of infringements that will be subjected to graphitization or gasification.

2, jet changes artificial automatic adjusting discharge capacity with shaft bottom drilling technology situation, and this technology has been applied for patent (being used for the bottom jet regulator on the drill bit, application number 91107203.9) by us

3, the preventing gear wheel from dropping off indicator, set up wrinkle type (1989 the 2nd phases of U.S.'s " drilling well ") by U.S. Lip river gram drill bit company, a kind of is that drill bit is protected through failure indicator, touch sensor is mounted in each bit leg palm back of the body top, sensor need be worn through and could indicate drill bit to scrap situation, and another kind is that bit bearing lost efficacy.Indicator, this device is very complicated, is because of bearing wear, after the gear wheel distortion thin-walled pressure vessel cut wear after, nozzle or stifled or increase the cross-section of river causes that pump pressure changes, and represents that promptly bit wear scraps.

Again because the stratum soft or hard alternately, as using solid bit efficient very low, as uses soft bit wear big again, if change the line of production once need be with time 2-3 month for bit model, and the drill bit of existing various models all can not be finished soft or hard and replaces effectively creeping into of frequent stratum.

The problem that the purpose of this utility model exists at above-mentioned rock bit prior art just, design and directly mill out steel-tooth arc tooth on a kind of employing cone shell, directly coating superhard material is oozed after the charcoal boronising in heat treatment, also adopt parallel bearing low pressure to press on towards the formula cooling, the circulating system of lubricious diamond and cleaning and the fluid sensor of simple and easy preventing gear wheel from dropping off, can replace multiple model drill bit to replace creeping into of stratum to adapt to soft or hard, simple in structure again (cancelled the store oil system and and sealing device, simplify manufacturing procedure), reliable and stable, the most practical multi-functional rock bit.

The purpose of this utility model is to be reached by following measure:

(1) the gear wheel steel-tooth is processed into the arc tooth, charcoal is oozed in heat treatment, and coating bortz powder after the boronising mainly is from internal layer to outer bortz powder concentration from thin to thick, granularity from fine to coarse, cutter teeth plating cutting edge height 1/4--1/3 promptly plates 1/4 of tooth depth before the sword, plate 1/3 of tooth depth behind the sword, coating should be between the 0.8-1.8 millimeter, all need strict the cleaning before all coatings, degreasing, the ability coating is firm and solid after the corrosion.

(2) bearing oozes gold-plated emery after charcoal, the boronising with existing Technology for Heating Processing, the big axial plane macropore of axle journal face, little axial plane aperture face, the 0.4-1 millimeter is all plated on two road thrust surfaces and c point plane, its stressed surface portion nickel plating or nickel-manganese, after plating is good, returns by the equipped principle size in axle and hole and to be ground to roughness

Polishing back packing.

(3) adopt parallel bearing low pressure to press on towards the formula cooling, the circulating system of lubricious diamond and cleaning at slurry hole tooth pawl boring fluting, up to little axial end, is installed a liquid stream reduction of speed plate in import department, adopts cure process on the import department surface.

(4) employing liquid spreads to feel and makes the preventing gear wheel from dropping off indicator, thereby brill one downward-sloping 15 °-25 ° aperture is connected with internal channel on the tooth pawl of slurry hole, keep tooth pawl diameter (passage) and macro-axis stress surface easily to grind the position certain thickness is arranged, if this thickness is worn through, can make indication to the downhole drill bit situation of scrapping.

Accompanying drawing is a cross-sectional view of the present utility model, below in conjunction with accompanying drawing structure of the present utility model and operating principle is described further.

Parallel bearing low pressure presses on towards formula cooling, lubricious diamond system such as figure and hole on tooth pawl 10 and slot 4,4 with the slurry hole 11 be communicated with, in import department 1 liquid stream reduction of speed plate 2 is installed, adopt liquefaction to handle around reduction of speed plate surface and the slurry hole, 2 are communicated with 4 again, circulation fluid is communicated with little axle 8 end faces by hole slot 4 inflow ducts 5 causes backflow, form the circulating system that a kind of low pressure presses on towards formula cooling, lubricious diamond and cleaning, thereby reach cooling, lubricious and bearing cleaning is everywhere inner, make the dead eye thorax clean, diamond is not subjected to pyrolytic damage.Liquid spreads to feel makes the preventing gear wheel from dropping off indicator, the aperture that bores downward-sloping 15 °-25 ° an of oral area (making it to produce suction in case silt immerses) in slurry hole 11 on the tooth pawl is connected with internal channel 3, keep the diameter wearing and tearing (passage) of tooth pawl 10 and the easy mill position of macro-axis stress surface sensing passage 13 that 2-4 millimeter thickness is arranged, when these positions grind off more than 2 millimeters, high-pressure slurry is gone out thus, at this moment increase suddenly owing to the cross-section of river, when ground pump pressure bust arrives certain constant voltage, proof axle journal or bit diameter may wear to a part and can not use again, pull out of hole at once, other renews drill bit, macro-axis fastness journal surface 6 and hole face 6 ₁, little axle fastness journal surface 8 and hole face 8 ₁, two road thrust surfaces 7, axis hole thrust surface 7 ₁, and c point plane 9 and gear wheel end face 9 ₁In axle journal force part all gold-plated emery 0.4-0.6 millimeters thick, 12 is the sword front of tooth, gold-plated emery 1-1.2 millimeters thick, and coating is 1/4,12 of a tooth depth ₁Be the sword back gold-plated emery 0.8-1.8 millimeters thick of tooth, coating is that 1/3,14 of tooth depth is a bottom jet regulator, and the utility model is set up adjuster, promptly becomes the multi-functional rock bit of the nineties.

The utility model compared with prior art has the following advantages:

1. simple in structure, cancelled store oil system and sealing device, simplify greatly manufacturing procedure, can save again the processing charges of 1/4-1/3.

2. adopt parallel bearing to add low pressure and press on towards the formula cooling, lubricious diamond is lubricious more reliable than freely cooling off, and can also at any time clear up the foreign matter in the bearing.

3. adopt arc steel-tooth coating, bring into play to greatest extent profile of tooth cutting advantage, but both diamond tooth of the hot pressing carbide alloy of conserve expensive, stop again the quality problems of permanent tooth appearance (such as complex process, program is many, break, to fall tooth frequent), also can be used for generally from firmly changing frequently stratum to broken ground and soft or hard in a large number.

4. can replace numerous bit models, a large amount of manpowers of changing the line of production and dropping in save producing, material resources, and can improve bearing service life and improve drilling speed 2-5 doubly more than.

5. scrap indicator owing to improved external present being seen drill bit, processing is simple, uses reliably, and the rock bit of scrapping of can substantially stopping to wear and tear is fallen the well accident.

Claims (3)

1, a kind of rock bit, gear wheel steel-tooth and bearing are made after all adopting Technology for Heating Processing, it is characterized in that:

The gear wheel steel-tooth is processed into the arc tooth, oozes that plating is coated with bortz powder after the charcoal boronising, main concentration from internal layer to outer bortz powder from thin to thick, granularity from fine to coarse, the cutting edge coating is the 1/4-1/3 of tooth depth,

After bearing oozed charcoal, boronising, plating was coated with bortz powder nickel or nickel-manganese, and return mill again and be polished to slightly that degree of making is 0.4-0.8,

Adopt parallel bearing low pressure to press on towards the circulating system that formula is cooled off lubricious diamond and cleaning, boring fluting 4 on the tooth pawl 10 of rock bit, liquid stream reduction of speed plate 2 is installed at import 1 place 4, reduction of speed plate 2 is communicated with hole slot 4, liquid stream flows into duct 5 to little axle 8 end faces by 4 and causes backflow, reach cooling, lubricious and the purpose of cleaning

Employing liquid spreads to feel makes the preventing gear wheel from dropping off indicator, in slurry hole 11, bore downward-sloping 15 °-25 ° aperture of an oral area on the tooth pawl 10, be connected with internal channel 3, keep the diameter wearing and tearing (passage) of tooth pawl 10 and the easy mill position of macro-axis stress surface sensing passage 13 that 2-4 millimeter thickness is arranged, scrap the situation indication to reach downhole drill bit.

2,, it is characterized in that 1/4 of the preceding 12 usefulness bortz powders of sword plating tooth depth, behind the sword 12 according to claim 1 said rock bit ₁1/3 of plating tooth depth, coating is between the 0.8-1.8 millimeter.

3, the rock bit of saying according to claim 1 is characterized in that big axial plane 6 of axle journal and macropore face 6 ₁, little axial plane 8 and aperture face 8 ₁, two road thrust surfaces 7, axis hole thrust surface 7 ₁, and c point plane 9 all gold-plated emery 0.4-1 millimeters, its surface portion nickel plating or nickel-manganese.

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