CN2429137Y - Roller cone bits with parallel inserts - Google Patents

Abstract

The utility model relates to a roller cone bit with parallel inserted teeth, which is used for drilling wells of petroleum, natural gas, mine and geology. The utility model comprises a cone leg and a roller cone, wherein, the roller cone is provided with a tooth ring and a tooth groove. The utility model is characterized in that the top of roller teeth of the tooth ring is provided with two to three inserted teeth in parallel along the direction of the roller teeth, and the tooth bodies of the inserted teeth are in cylindrical shapes. The cutting performance of the utility model is similar to the cutting performance of oblate alloy teeth. The traditional cylindrical tooth bodies are used by the utility model. The utility model has the advantages of easy machining and low manufacture cost. The utility model can effectively drill, chisel and break sandwich strata with soft and hard strata. The utility model has good comprehensive economic benefit to the drilling of the sandwich strata.

Description

A kind of rifler with parallelly inlaid

This utility model relates to a kind of rifler that is used for oil, natural gas, mine and geological drilling, relates in particular to a kind of rifler with parallelly inlaid.

Rifler is extensively used as the apparatus of rock stratum, a kind of drilling stratum.Rifler is made of palm of roller bits usually, gear wheel can have one or more, cantilevered axle and the gear wheel hole activity of bit leg by its underpart connects and makes the gear wheel can be around the rotation of bit leg cantilevered axle, and the cutting structure of gear wheel outer surface is broken rock under the impact that compound motion produced, crushing and the slip shear action that constitute with the commentaries on classics of gear wheel platform, rotation and length feed.Existing rifler branch has steel-tooth bit and tungsten carbide insert bit two classes, wherein the tooth of steel-tooth bit and gear wheel are one, has more roomy tooth cutting edge, can scrape the cutter soft formation effectively, but when running into than hard formation, steel-tooth easily is worn and loses the cutting function, even cover one deck high-abrasive material on tooth, runs into the hard formation steel-tooth and still easily peels off with cracked.To geological stratification with dissection, when using steel tooth bit that the hard place interval can not effectively be passed, must use insert bit instead.Insertedly make by carbide alloy usually, have higher hardness and anti-wear performance, but inserted cutting edge is not wide, can not efficiently creep into the hag interval.This shows that existing steel-tooth and insert bit all can not be used for the Drilling on interlayer stratum cost-effectively.For overcoming the problem of above-mentioned existence, a kind of rifler with oblate carbide button of long crown has been proposed in the U.S. Pat 5421423, though this drill bit can be effective to the interlayer stratum, but the interference fit when splice in the oblate hole on oblate carbide button and the gear wheel needs the very high machining accuracy of the equal tool of tooth and hole, and therefore, not only difficulty of processing is big to make the rifler of so oblate carbide button, make efficiency is low, and the processing cost height, expense is expensive, and is less economical.

The purpose of this utility model is to provide a kind of rifler with parallelly inlaid at the deficiency of above-mentioned existence, and it not only is easy to make and processing, and cost is low, and effective Drilling interlayer stratum.

The purpose of this utility model is realized by following technical scheme: include bit leg and gear wheel, gear wheel is provided with gear ring and teeth groove, and its difference is that it is cylindrical inserted being installed on 2-3 denticle at the gear teeth top of gear ring side by side along gear teeth direction.

Press such scheme, the inter-lobe clearance of parallelly inlaid can be 2-5mm, and inserted crown is a wedge shape, has long cutting edge, and the gear teeth of gear ring can be right cone profile of tooth and straight-tooth shape, perhaps cone gear form and spiral straight-tooth shape in the shape of a spiral, and pitch angle alpha will is 0-15 °.

Good effect of the present utility model is: 1, adopt the parallelly inlaid structure, its cutting ability is close with oblate carbide button, can possess long cutting edge is arranged, and the easier wedging of the discontinuous long crown stratum of Gou Chenging thus, help to improve the efficiency of breaking rock and the life-span of drill bit, and teeth groove and annular separate slot will help chip removal, improve machining condition, prevent the generation of mud drum phenomenon; 2, adopting denticle is that columniform tradition is inserted, not only is easy to processing, makes the quality of fit height, and product quality is guaranteed, and the cost of making is low, possesses better economic; 3, but both broken hard formation of Drilling of this rifler can be scraped cutter again and creep into soft formation, therefore can be used for effectively the efficient of creeping into the interlayer stratum being further improved Drilling interlayer stratum.

Fig. 1 is the forward full sectional view of gear wheel among embodiment of this utility model.

Fig. 2 is the vertical view of gear wheel among embodiment of this utility model.

Fig. 3 is the vertical view of gear wheel among another embodiment of this utility model.

Further specify embodiment of the present utility model below in conjunction with accompanying drawing, include bit leg and gear wheel 1, bit leg is connected with gear wheel by the cantilevered axle of bottom, usually can be installed on 1-3 gear wheel, the structure of gear wheel such as Fig. 1, shown in 2, offer connection holes 5 in the gear wheel, the gear wheel profile is cone gear form, is provided with layer 2-4 gear ring 3 up and down, offer the separate slot 4 that goes in ring between the gear ring, offer teeth groove 6 on each gear ring, form the gear teeth thus, the gear teeth are the right cone profile of tooth, teeth directional is consistent with gear wheel cone generatrices direction, the tooth top of the gear teeth along gear teeth direction be installed on side by side 2 inserted by 2, inserted is that the carbide alloy of conventional shape is inserted, also can be made by other high hard Materials with High Strength, inserted denticle is cylindrical, close with the tight edge of the circular hole of offering on the gear wheel, inserted crown is wedge shape, and two inserted gap is 3mm.

The 2nd embodiment of the present utility model as shown in Figure 3, it is angles of the relative gear wheel cone generatrices of teeth directional deflection of the gear ring gear teeth with the main difference part of a last embodiment, the gear ring gear teeth are cone gear form in the shape of a spiral, pitch angle alpha will is 5-15 °, gear wheel is provided with two-layer gear ring 3 up and down, gear teeth top in the gear ring of upper strata along gear teeth teeth directional be installed on side by side 2 inserted by 2, gear teeth top in lower floor's gear ring along gear teeth teeth directional be installed on side by side 3 inserted, offer the separate slot 4 that goes in ring between the two-layer gear ring, offer teeth groove 6 on the gear ring.The gear wheel of this spline structure of present embodiment also can be provided with the layer 2-4 gear ring.

Claims (8)

1, a kind of rifler with parallelly inlaid includes bit leg and gear wheel, and gear wheel is provided with gear ring and teeth groove, it is characterized in that it is cylindrical inserted being installed on 2-3 denticle at the gear teeth top of gear ring side by side along gear teeth direction.

2, by the described rifler of claim 1, it is characterized in that the inter-lobe clearance of parallelly inlaid can be 2-5mm with parallelly inlaid.

3,, it is characterized in that inserted crown is a wedge shape by claim 1 or 2 described rifler with parallelly inlaid.

4, by claim 1 or 2 described rifler, it is characterized in that the gear teeth of gear ring (3) are the right cone profile of tooth with parallelly inlaid.

5, by claim 1 or 2 described rifler with parallelly inlaid, the gear teeth that it is characterized in that gear ring are cone gear form in the shape of a spiral, and pitch angle alpha will is 0-15 °.

6, by the described rifler of claim 4 with parallelly inlaid, it is characterized in that being provided with layer 2-4 gear ring (3) up and down, offer belt separate slot (4) between the gear ring, offer teeth groove (6) on each gear ring, form the gear teeth thus, the gear teeth are the right cone profile of tooth, and teeth directional is consistent with gear wheel cone generatrices direction, are installed on 2 inserted (2) at the tooth top of the gear teeth side by side along gear teeth direction.

7, by the described rifler of claim 5 with parallelly inlaid, it is characterized in that gear wheel is provided with two-layer gear ring (3) up and down, gear teeth top in the gear ring of upper strata is installed on 2 inserted (2) side by side along gear teeth teeth directional, gear teeth tooth top portion in lower floor's gear ring along gear teeth teeth directional be installed on side by side 3 inserted, offer belt separate slot (4) between the two-layer gear ring, offer teeth groove (6) on the gear ring.

8, by claim 1 or 2 described rifler with parallelly inlaid, it is characterized in that inserted for carbide alloy make inserted.

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