CN205135429U - PDC drill bit with reinforcing orientation is nature controlled easily - Google Patents

PDC drill bit with reinforcing orientation is nature controlled easily Download PDF

Info

Publication number
CN205135429U
CN205135429U CN 201521008823 CN201521008823U CN205135429U CN 205135429 U CN205135429 U CN 205135429U CN 201521008823 CN201521008823 CN 201521008823 CN 201521008823 U CN201521008823 U CN 201521008823U CN 205135429 U CN205135429 U CN 205135429U
Authority
CN
Grant status
Grant
Patent type
Prior art keywords
bit
drill bit
cutting
drill
radius
Prior art date
Application number
CN 201521008823
Other languages
Chinese (zh)
Inventor
张亮
田家林
李舒
曾德发
王磊
郑耀东
Original Assignee
四川深远石油钻井工具股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Grant date

Links

Abstract

The utility model relates to a PDC drill bit with reinforcing orientation is nature controlled easily, including bit body, crown and cutting teeth, be provided with a plurality of cutting teeths on the outline line of crown, the bent profile of surface of crown of drill bit is formed by core, nasal part, the outside, shoulder and the section smooth connection of rule footpath in proper order, the drill bit core be the concave spherical surface, the cutting teeth that is close to bit body center department be the side cut tooth, and its cut edge with the point of intersect of excircle on the axis of bit body 1, the profile that the shoulder of drill bit corresponds be spherical surface structure, a rule directly section corresponding profile are cone structure. The utility model has the advantages of: the drill bit is in directional drilling and build -up process, and its core is better with the shaft bottom laminating, and the steering drag of core is all littleer with the frictional resistance who advises the footpath, orientation through the reinforcing drill bit is controlled the performance and is improved wall of a well quality, can reduce the skew degree of directional orbit to improve directional drilling's construction quality.

Description

一种具有増强定向易控性的PDC钻头 Zo having a strong orientation easy control of PDC bits

技术领域 FIELD

[0001]本实用新型涉及石油天然气钻探工程、矿山开采、地质钻探、建筑工程、隧道工程、盾构及非开挖等技术设备领域,特别是一种具有增强定向易控性的roc钻头。 [0001] Technical Field The present invention relates to oil and gas drilling engineering, mining, geological drilling, construction, engineering, shield and non-excavation equipment, is particularly easy to control with enhanced orientation of the drill bit roc.

背景技术 Background technique

[0002]随着社会对油气资源需求量的增加,赋存条件较差的油气资源以及新型油气资源的开采成为必然,例如深层油气、页岩气、煤层气、海洋油气资源等等。 [0002] With an increase in demand for oil and gas resources, poor storage conditions of oil and gas resources and the exploitation of new oil and gas resources has become inevitable, such as deep oil and gas, shale gas, coalbed methane, offshore oil and gas resources, and so on. 在新的油气资源开采的条件下,钻井作业面临新的需求。 Under the new conditions of oil and gas resources exploitation, drilling operations are facing new demands. 总体而言,井身结构面临更深远、更复杂的情况;对于井型而言,定向井、水平井、分支井等技术大量运用。 Overall, casing face a more far-reaching, more complex cases; for the well type, the directional wells, horizontal wells, wells and other branches of the extensive use of technology. 而造斜段作为这些井身结构中的变向部位,其作业过程的质量、效率对于钻井费用、钻井时间等有较大影响。 As a variant the curve section to the portion of the well structure, the quality of its operation process have a greater effect on the drilling efficiency of cost, drilling time.

[0003]在井眼造斜过程中,传统PDC钻头存在造斜曲率过大、钻头磨损严重、井壁不光滑、时常卡钻、造斜摩擦阻力过大、实际轨迹较设计轨迹偏离较大等缺陷,这与当下提出的低成本、高效率的钻井理念相违背。 [0003] In the course of the wellbore the whipstock, whipstock presence of a conventional PDC bit curvature is too large, severe wear of the drill, the borehole wall is not smooth, often sticking, whipstock frictional resistance is too large, the actual trajectory path offsets larger than the other design defects, which raised with the current low-cost, high-efficiency drilling contrary to the idea. 针对这种现状,国内外许多专家对钻头在井眼造斜过程中出现的种种问题进行了大量研究。 In view of this situation, many domestic and foreign experts on the problems occurring in the drill borehole kickoff was the subject of extensive research. 但大多数研究都停留在钻具组合和弯接头设计等方面,鲜有研究综合考虑roc钻头心部形状对井眼造斜的影响。 But most of them have stayed in the BHA and bent sub design, few studies have considered the impact roc drill heart shape for kickoff of the wellbore.

[0004] PDC钻头在砂岩和泥岩地层机械钻速高、钻头工作寿命长、耐高温能力强于牙轮钻头,同样适合定向井、水平井施工。 [0004] PDC bit sandstone and shale formations high ROP, bit long working life, high temperature capability in roller cone bits, for the same directional and horizontal well construction. 现在roc钻头已成为油气钻井的主力钻头,但在定向井作业中,常出现初始造斜困难、方位不稳、钻头偏移趋势增加、钻头进尺缓慢等现象。 Roc drill has now become the main drill oil and gas drilling, but in directional drilling operations, often deflecting the initial difficulties, unstable position, drill offset the increase trend, drill footage slow and so on. 在影响pdc钻头定向钻进能力因素中,心部形状的设计特点尤为关键。 Among the factors affecting pdc drill directional drilling capabilities, the design features of the shape of the heart is particularly critical. 决定着定向造斜是否成功,稳斜阶段能否保持平稳钻进。 Determine the directional kickoff success, steady ramp phase can be maintained stable drilling. 如图5所示,现有的roc钻头竖心现象比较严重,造斜易控性能较差。 5, the conventional vertical drill center roc severe, poor performance whipstock easy to control. 其在造斜过程中,钻进距离为h,角度为β,切削齿钻进过程负载(破岩)与空载体积结果直接决定了钻头的偏转能力,如图7所示,其钻头在中心处负载与空载体积变化大,钻头造斜可靠性差,规径齿的破岩结果导致钻头扭矩增加,造斜困难。 Which whipstock during drilling distance is h, the angle beta], cutting teeth drilling process load (breaking rock) and the load deflection will determine the volume of the results of the bit is, as shown in FIG. 7, in which the center of the drill the load at the load volume changes, poor reliability whipstocking drill, rock breaking results gage bit torque increase causes the teeth, whipstock difficult.

[0005]作为常规能源的重要补充能源页岩气的开发,资源的开采难度较大,钻探不同于常规钻井,钻井中的丛式井及水平定向井较多,这就需要roc钻头具有良好的定向性和造斜易控性,从而缩短开采前期的周期,符合钻井的经济理念。 [0005] As an important supplement to conventional energy development energy shale gas, the difficulty of large mining resources, drilling differs from conventional drilling, drilling more wells in the cluster and horizontal directional drilling, which requires a good bit of roc directional kickoff and easy to control, thereby shortening the period of pre-mining, in line with the concept of economic drilling.

[0006]随着大量油田的过度开采,油田单井产量逐渐下降。 [0006] With a large number of over-exploitation of oil fields, oil well production gradually declined. 如何在现有井口的基础上增加单井采收率,已成为众多专家研究的主要课题。 How to increase single well oil recovery on the basis of existing wellhead, it has become a major subject of numerous expert studies. 在已发现油田区块上另钻油井,不仅会增加业主方投资,而且会给当地环境造成较大破坏。 Another drill oil wells in the oil blocks have been found, the owner will not only increase investment, but will cause greater damage to the local environment. 因此,在已钻油井的基础上进行二次开发(通过打斜井、水平井、丛式井等造斜方法到达探明的油层)符合时下的经济理念和环境保护要求。 Therefore, on the basis of secondary development wells have been drilled on (by playing the kickoff method deviated, horizontal wells and cluster wells arrival proven oil) meet the requirements of environmental protection and economic philosophy nowadays.

[0007]从钻头现场使用的情况来看,钻头偏转能力的大小直接决定了井眼实际造斜轨迹与设计轨迹的相符程度。 [0007] From the point of view of the drill field use, the size of the drill bit deflection ability to directly determine the extent of the wellbore actually made oblique trajectory is consistent with the design of the track. 钻头偏转能力强,其造斜段的实际轨迹与设计轨迹相符程度高,能较好解决初始造斜困难、方位不稳等问题,可大大节约到达目的油层的时间与费用,同时降低造斜段井下工具发生事故的风险;相反,钻头偏转能力弱,其造斜段的实际轨迹与设计轨迹相符程度低,增加钻头到达目的油层的时间,同时增加了井下工具的磨损力度和井下事故风险。 Strong drill deflection capacity, the curve section of the actual trajectory and the trajectory design high degree of coincidence, can better solve the initial kickoff difficult position instability and other problems can be significant savings in time and money to reach the purpose reservoir, while reducing the curve section risk of accidents occur downhole tools; the contrary, the ability to deflect the drill bit weak, its actual trajectory curve section of track design and low degree of coincidence, the purpose of increasing the oil drill time of arrival, while increasing the intensity of wear of downhole tools and downhole risk of accidents.

实用新型内容 SUMMARY

[0008]本实用新型的目的在于克服现有技术的缺点,提供一种具有良好的偏转性能,规径部位不主动切削和使钻头工作平稳的具有增强定向易控性的roc钻头。 [0008] The object of the present invention is to overcome the disadvantages of the prior art, to provide a good deflecting properties, the gage cutting portions are not active and smooth operation of the drill bit having enhanced easy to control the orientation of the drill bit roc.

[0009]本实用新型的目的通过以下技术方案来实现:一种具有增强定向易控性的PDC钻头,包括钻头体、冠部和切削齿,冠部沿钻头体底面和侧面设置,冠部的回转轮廓线上设置有多个切削齿,所述的冠部的回转轮廓线由依次连接的心部、鼻部、外侧、肩部和规径段组成,所述的心部为凹球面,与鼻部的轮廓平滑连接,凹球面在钻头径向上的分布半径R1大于1/4钻头半径,小于3/4钻头半径,凹球面的曲率半径R2大于1/4钻头半径,小于5倍钻头半径;靠近钻头体中心处的切削齿为中心齿。 [0009] The object of the present invention is achieved by the following technical solution: easy to control with enhanced orientation of PDC bit, comprising a bit body, the cutting teeth and the crown portion, the crown portion of the bit body along the side surface and the bottom surface is provided, the crown portion rotary contour provided with a plurality of cutting teeth, said pivot contour of the crown portion from the heart are connected in turn, the nose, outer, shoulder and gauge diameter section composed of the core portion is a concave spherical surface, and nasal contours are smoothly connected, the radius R1 of a concave spherical distribution in the radial direction on the drill bit is greater than 1/4 of the radius, the radius of the drill bit less than 3/4, the concave spherical surface a radius of curvature R2 is greater than 1/4 of the radius of the bit, is less than five times the radius of the drill bit; the cutting teeth near the center of the bit body as the center tooth.

[0010] 所述的中心齿为复合片切边齿,切边长度为L,切角为γ:0<L<D,30° < γ <90° ,且其切边与外圆的一个交点在钻头体的轴线上。 Central tooth [0010] The composite sheet is trimmed teeth, cutting length L, is the cutting angle γ: 0 <L <D, 30 ° <γ <90 °, and a cutting edge which is an intersection with the outer on the axis of the bit body.

[0011]所述的肩部对应的轮廓为球面结构,其径向尺寸D对应为钻头设计直径,与规径段的轮廓平滑连接;所述的规径段对应的轮廓为圆锥结构,且其对应的锥面与钻头体的轴线的夹角< 5。 Contour corresponding to the shoulder [0011] of the spherical structure, which corresponds to the radial dimension D is the diameter of the drill bit design, the contour of smoothly connected segments gage; gage section corresponding to the profile of a conical configuration, and which the angle corresponding to the tapered surface and the axis of the bit body <5. .

[0012]本实用新型具有以下优点: [0012] The present invention has the following advantages:

[0013] 1、钻头心部为凹球面,在定向井钻进和造斜过程中,井底岩石中心部位形成一个球面,其心部与井底贴合更好,心部的转向阻力更小,具有良好的偏转性能,使实际造斜轨迹与理论设计轨迹能够较好地吻合。 [0013] 1, a drill core portion is a concave spherical surface, and for directional drilling in whipstocking during rock bottom portion forming a spherical center of its bottom center, and the better fit, the center of the steering resistance is smaller , deflection good performance, actual and theoretical design whipstock trajectory matched well trajectory.

[0014] 2、所述的肩部冠形组合,可实现过渡区域的主动切削,增强钻头定向偏移能力,一直延伸到过渡曲线规径,此时过渡曲线规径不主动与岩石接触,实现规径部位在定向钻井时不主动切削。 [0014] 2, the shoulder crown compositions, the active cutting the transition region can be achieved, enhancing the ability to drill directional offset, the transition curve extending to the gage, the gage transition curve at this time is not actively in contact with the rock, to achieve gage cutting portions are not active during directional drilling.

[0015] 3、所述的位于中心部位的切边齿,其最高点在钻头体的轴线上,钻头破岩过程中,在保证钻头中心凹球面的同时,可实现切边齿破岩过程主要承受挤压载荷,而不是拉伸载荷,从而可提高中心切削齿的破岩性能,避免同一切削齿同时承受拉伸挤压载荷而产生崩齿现象。 [0015] 3, is located in the central portion of the tooth cutting edge, its highest point on the axis of the bit body, the rock breaking process, to ensure that the center of the drill while the concave spherical surface, the tooth cutting edge can be achieved mainly rock fragmentation subjected to compressive load rather than tensile loads, whereby the center of the cutting teeth can be improved rock breaking performance and to avoid the same cutting teeth withstand loads generated by stretching the extruded tooth collapse phenomenon.

[0016] 4、心部凹球面冠底设置的水眼,使高压钻井液不仅能够冷却切削齿和排出岩肩,还可以在钻头和心部岩石之间形成润滑粘膜,有效地减小钻头在偏转过程中的阻力,从而增加了该roc钻头的偏转性能。 [0016] 4, the concave spherical portion oculocardiac water bottom crown provided, not only to cool the high-pressure drilling fluid and the discharge rock shoulder cutting teeth, the mucosa may be formed between the drill bit lubrication and center rock, the drill bit in effectively reduced resistance during deflection, thereby increasing the performance of the deflection of the drill bit roc.

[0017] 5、本实用新型钻头在中心处负载与空载体积变化较小,钻头造斜可靠性可增强,肩部及规径处的轮廓设计,可使钻头造斜所需扭矩减小,且提高井壁光滑度,可以减小定向轨迹的偏移程度,从而提高定向钻井的施工质量。 [0017] 5, the present invention is a drill bit with a load volume of load change is small at the center, can enhance the reliability of the bit whipstock, contoured shoulder and gage at the enable bit whipstock desired torque reduction, and improved wall smoothness, the degree of orientation of the track offset can be reduced, thereby enhancing the construction quality of directional drilling.

附图说明 BRIEF DESCRIPTION

[0018]图1为本实用新型的结构不意图; [0018] Figure 1 is not intended utility model structure;

[0019]图2为本实用新型的原理图; [0019] FIG. 2 is a schematic diagram invention;

[0020] 图3为中心齿的立体图; [0020] FIG. 3 is a perspective view of the center tooth;

[0021]图4为图1中心部局部放大结构示意图; [0021] FIG. 4 is a partial enlarged central portion of FIG. 1 a schematic view of the structure;

[0022]图5为现有roc钻头布齿轮廓示意图; [0022] FIG. 5 is a schematic outline of a drill bit tooth arrangement prior ROC;

[0023]图6为造斜过程钻头破岩位置变化示意图; [0023] FIG. 6 is a whipstock during rock breaking position change schematic;

[0024]图7为现有钻头造斜过程岩石吃入量示意图; [0024] FIG. 7 whipstock intake schematic eat during rock bit is conventional;

[0025]图8为本实用新型的钻头造斜过程岩石吃入量示意图; [0025] FIG. 8 of the present invention the process of rock drill whipstock food intake schematic;

[0026]图中:1-钻头体,2-冠部轮廓,3-心部,4-鼻部,5-外侧,6_肩部,7_规径段,8_切削齿,9-中心齿,10-水眼。 [0026] FIG: 1 to the bit body, the crown profile 2-, 3- core portion, a nose 4-, 5- outside shoulder 6_, 7_ gage section, the cutting teeth 8_, 9- center teeth, 10 water hole.

具体实施方式 detailed description

[0027]下面结合附图对本实用新型做进一步的描述,但本实用新型的保护范围不局限于以下所述。 [0027] DRAWINGS The present invention is further described, but the scope of protection of the present invention is not limited to the following binding.

[0028]如图1和图2所示,一种具有增强定向易控性的PDC钻头,包括钻头体1、冠部2和切削齿8,冠部2沿钻头体1底面和侧面设置,冠部2的回转轮廓线上设置有多个切削齿8,所述的冠部2的回转轮廓线由依次连接的心部3、鼻部4、外侧5、肩部6和规径段7组成,所述的心部3为凹球面,与鼻部4的轮廓平滑连接,凹球面在钻头径向上的半径大于1/4钻头半径,小于3/4钻头半径,凹球面的曲率半径大于1/4钻头半径,小于5倍钻头半径;靠近钻头体1中心处的切削齿8为中心齿9。 [0028] FIGS. 1 and 2, having an enhanced and easy to control the orientation of the PDC bit, comprising a bit body, a crown portion 2 and the cutting teeth 8, the crown portion 2 along the side surface of the bit body 1 and the bottom surface disposed crown rotary contour portion 2 is provided with a plurality of cutting teeth 8, the crown portion 2 by the rotary core contour line sequentially connecting portion 3, nose 4, 5 outside the shoulder and gage sections 6 7 composition, the heart is a concave spherical surface portion 3, 4 connected smoothly to the contour of the nose, and the concave spherical radius in the radial direction on the drill bit is greater than 1/4 of the radius, the radius of the drill bit less than 3/4, the radius of curvature of the concave spherical surface is greater than 1/4 the radius of the drill bit, the drill bit is less than 5 times the radius; 1 cutting teeth near the center of the bit body 8 to the center of the tooth 9.

[0029]如图3和图4所示,所述的中心齿9为复合片切边齿,切边长度为L,切角为γ:0<L<D,30° < γ <90°,且其切边与外圆的一个交点在钻头体1的轴线上。 [0029] As shown in FIG. 3 and FIG. 4, the central gear tooth cutting edge 9 of the composite sheet, cutting length L, is the cutting angle γ: 0 <L <D, 30 ° <γ <90 °, intersection with a cutting edge and which cylindrical axis of the bit body 1.

[0030]如图2所示,所述的肩部6对应的轮廓为球面结构,其径向尺寸对应为钻头设计直径,与规径段7的轮廓平滑连接;所述的规径段7对应的轮廓为圆锥结构,且其对应的锥面与钻头体1的轴线的夹角<5°。 [0030] 2, the shoulder 6 a spherical configuration corresponding to the contour of which corresponds to the radial dimension of the drill diameter design, connected smoothly to the contour of the gage section 7; the gauge diameter section 7 corresponding to the contour cone structure, and the angle of the axis of a corresponding tapered surface of the bit body <5 °.

[0031]所述的心部3两侧还设置有水眼10,不仅能给刀翼顶端切削齿降温,还可以在钻头和心部岩石之间形成润滑粘膜,有效地减小钻头在偏转过程中的阻力,从而增加了该roc钻头的偏转性能。 [0031] both sides of the core portion 3 is also provided with a water hole 10, not only to give the knife cutting teeth wing tip cool, lubricate mucous membrane may also be formed between the core portion and the rock drill, drill effectively reduced during deflection the resistance, thereby increasing the performance of the deflection of the drill bit roc.

[0032]在硬地层定向钻井的过程中,采用大半径圆弧曲线的心部3为主动切削岩石破岩,接触岩石面积大,可控性增大,钻头导向增强,增大钻头肩部的切削齿数量,更好的分布了载荷,冠面2主动切肩岩石,此时规径段7与岩部嵌合,实现过渡区域的主动切削,增强了钻头定向偏移能力,此时规径段7不主动与岩石接触,实现规径部位在定向钻井时不主动切削。 [0032] In the process of directional drilling hard formations, the use of large core radius of the arc curve section 3 is an active cutting rock breaking rock, rock large contact area, increasing controllability, the drill guide enhanced, increasing the bit shoulder the number of cutting teeth, a better distribution of the load, cut shoulder crown surface active rock 2, this time with the gage section 7 rock fitting portion, the active cutting transition region to achieve enhanced directional drill bit offset capability, this time period gage 7 in contact with the rock is not active, to achieve the gage cutting portions are not active during directional drilling.

[0033]在软地层定向钻井的过程中,采用小半径圆弧曲线的心部3,增加钻头的钻井性會泛。 [0033] In soft formations during directional drilling, the use of a small core radius of the arc curve section 3, will increase the bit drilling of the pan.

[0034]在研磨性地层和硬地层的定向钻井过程中,采用大半径圆弧曲线且圆弧曲线离中心线较远的心部3,会使肩部6变得尖锐,从而提高钻头钻进性能,此时规径段7与岩部嵌合,实现过渡区域的主动切削,增强了钻头定向偏移能力,此时规径段7不主动与岩石接触,实现规径部位在定向钻井时不主动切削。 [0034] In the process of directional drilling hard and abrasive formations of the formation, using a large curve radius of the arc and the arc curve from the core center line farther 3, the shoulder portion 6 will be sharpened, thereby improving the drilling bit properties, this time with the gage section 7 rock fitting portion, the active cutting transition region to achieve enhanced directional drill bit offset capability, this time period gage 7 in contact with the rock is not actively realized gage portion when directional drilling is not active cutting.

[0035]在软地层的定向钻井中,采用小半径圆弧曲线且圆弧曲线离中心线较近的心部3,会增加钻头肩部6处切削齿8的数量,有效的改善肩部6切削齿应力集中的状况,此时规径段7与岩部嵌合,实现过渡区域的主动切削,增强了钻头定向偏移能力,此时规径段7不主动与岩石接触,实现规径部位在定向钻井时不主动切削。 [0035] In directional drilling in soft formations, a small curve radius of the arc and the arc curve from the core portion closer to center line 3, the bit will increase the number of cutting teeth 8 at the shoulder 6, the effective improvement shoulder 6 the cutting tooth of stress concentration, the situation where the gage section fitting portion 7 and the rock, the cutting implement active transition region, enhancing the ability to drill directional offset, the gage section 7 at this time is not actively in contact with the rock, to achieve the gage portion when not actively cutting directional drilling.

[0036]如图2所示,心部3为凹球面,其结构决定了井底模型中心处比较平缓的外凸形,从而增强造斜易控性能。 [0036] 2, the core part 3 is a concave spherical surface, which determines the structure at the bottom center of the model is relatively flat outer convex, thereby enhancing the performance whipstock easy to control.

[0037] 如图6〜8所示,PDC钻头在转向过程中由鼻部4处的六!点运动到A3点,此时两对应的量轴线线交于0点,与现有钻头相比,当变向角度为相同的β角度时,本实用新型的钻头的0Α3值更大,所以,左边翘起的程度较弱,即左边仍然可切削岩石(吃入量较右边有所减小),而传统钻头则左边有可能完全翘起,即不切削岩石,此时切削齿所受冲击较大,增加了切削齿冲击破碎的风险。 [0037] As shown, the PDC drill bit during steering of the nose 4 by the six! A3 point to the point where two lines cross the axis of the corresponding amount of 6 ~ 8 at 0:00, compared to the conventional drill bit when the direction change angle is the same angle β, the present invention 0Α3 bit larger value, so that the degree of tilt left weak, i.e., left still cutting rock (food intake has been reduced compared to the right) , while the traditional drill is possible to completely tilt to the left, that is, not cutting rock, this time cutting teeth suffered a greater impact, increasing the risk of impact crusher cutting teeth. 在造斜过程中,本实用新型钻头在中心处负载与空载体积变化较小,钻头造斜可靠性可增强,钻头的规径处的轮廓设计,使得钻头破岩过程规径齿呈圆球状破岩,可使钻头造斜所需扭矩减小,且提高井壁光滑度。 In the course of the whipstock, the present invention is a drill bit at the center of the load and no-load small changes in volume, can enhance the reliability of the bit whipstock, the outline of the design of the gage of the bit, so that the rock breaking process gage teeth cylindrical spherical breaking rock, the drill bit can whipstock desired torque reduction, and improving sidewall smoothness.

Claims (3)

  1. 1.一种具有增强定向易控性的PDC钻头,包括钻头体(1)、冠部(2 )和切削齿(8 ),冠部(2)沿钻头体(1)底面和侧面设置,冠部(2)的回转轮廓线上设置有多个切削齿(8),其特征在于:所述的冠部(2)的回转轮廓线由依次连接的心部(3)、鼻部(4)、外侧(5)、肩部(6)和规径段(7)组成,所述的心部(3)为凹球面,与鼻部(4)的轮廓平滑连接,凹球面在钻头径向上的分布半径R1大于1/4钻头半径,小于3/4钻头半径,凹球面的曲率半径R2大于1/4钻头半径,小于5倍钻头半径;靠近钻头体(1)中心处的切削齿为切边齿(9)。 An easy to control the orientation of the reinforcement having a PDC bit, comprising a bit body (1), the crown (2) and the cutting teeth (8), a crown (2) along the bit body (1) bottom and side disposed crown section (2) is provided with a plurality of rotary contour line cutting teeth (8), characterized in that: said crown portion (2) by the rotary core section contour line sequentially connected (3), nose (4) , the outer (5), a shoulder (6) and the gage section (7), with the core section (3) is a concave spherical surface, smoothly connected to the nose (4) of the profile, a concave spherical surface in the radial direction of the drill bit R1 is greater than 1/4 of the radius distribution of the radius of the drill bit, the drill bit is less than 3/4 of the radius of the concave spherical surface of radius of curvature R2 is greater than 1/4 of the radius of the bit, is less than five times the radius of the drill bit; close to the bit body (1) at the center of the cutting teeth trimming the teeth (9).
  2. 2.根据权利要求1所述的一种具有增强定向易控性的PDC钻头,其特征在于:所述的切边齿(9),切边长度为L,切角为γ:0<L<d,30°<y <90°,且切边与外圆的一个交点在钻头体(1)的轴线上。 According to one of the claim 1 having enhanced easy to control the orientation of the PDC bit, wherein: said trimming teeth (9), cutting length L, is the cutting angle γ: 0 <L < d, 30 ° <y <90 °, and a point of intersection with the outer cutting edge of the bit body (1) on the axis.
  3. 3.根据权利要求1所述的一种具有增强定向易控性的PDC钻头,其特征在于:所述的肩部(6)对应的轮廓为球面结构,其径向尺寸D对应为钻头设计直径,与规径段(7)的轮廓平滑连接;所述的规径段(7 )对应的轮廓为圆锥结构,且其对应的锥面与钻头体(1)的轴线的夹Λ <5° ο According to one of the claim 1 having enhanced easy to control the orientation of the PDC bit, wherein: said shoulder (6) corresponds to the contour of a spherical structure, a radial dimension D corresponding to the diameter of the drill design , the contour of the gage section (7) smoothly connected; said gage section (7) corresponding to the contour of a conical configuration, and a tapered surface corresponding to the bit body (1) axis of the clip Λ <5 ° ο
CN 201521008823 2015-07-24 2015-12-08 PDC drill bit with reinforcing orientation is nature controlled easily CN205135429U (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201510440757 2015-07-24
CN 201521008823 CN205135429U (en) 2015-07-24 2015-12-08 PDC drill bit with reinforcing orientation is nature controlled easily

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201521008823 CN205135429U (en) 2015-07-24 2015-12-08 PDC drill bit with reinforcing orientation is nature controlled easily

Publications (1)

Publication Number Publication Date
CN205135429U true CN205135429U (en) 2016-04-06

Family

ID=55602706

Family Applications (2)

Application Number Title Priority Date Filing Date
CN 201521008823 CN205135429U (en) 2015-07-24 2015-12-08 PDC drill bit with reinforcing orientation is nature controlled easily
CN 201510895382 CN105464599A (en) 2015-07-24 2015-12-08 PDC drill bit with directional easy controllability enhancing performance

Family Applications After (1)

Application Number Title Priority Date Filing Date
CN 201510895382 CN105464599A (en) 2015-07-24 2015-12-08 PDC drill bit with directional easy controllability enhancing performance

Country Status (1)

Country Link
CN (2) CN205135429U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105464599A (en) * 2015-07-24 2016-04-06 四川深远石油钻井工具股份有限公司 PDC drill bit with directional easy controllability enhancing performance

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201013242Y (en) * 2007-03-15 2008-01-30 中国石化集团胜利石油管理局钻井工艺研究院 Directional drilling bit
CN201159050Y (en) * 2007-12-14 2008-12-03 青岛石大华通科技有限公司 Knife blade type PDC drilling bit for petroleum and natural gas drilling
CN201786265U (en) * 2010-03-26 2011-04-06 成都百施特金刚石钻头有限公司 Polycrystalline diamond compact (PDC) drill head with stable tool face for directional driller
CN201738815U (en) * 2010-05-10 2011-02-09 中国石油天然气股份有限公司 Inclining-prevention PDC drill bit
US9366090B2 (en) * 2011-02-10 2016-06-14 Smith International, Inc. Kerfing hybrid drill bit and other downhole cutting tools
CN104619946A (en) * 2012-08-17 2015-05-13 史密斯国际有限公司 Downhole cutting tools having hybrid cutting structures
CN104196458A (en) * 2014-08-26 2014-12-10 莱州市原野科技有限公司 Sharp-tooth PDC drill bit
CN205135429U (en) * 2015-07-24 2016-04-06 四川深远石油钻井工具股份有限公司 PDC drill bit with reinforcing orientation is nature controlled easily

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105464599A (en) * 2015-07-24 2016-04-06 四川深远石油钻井工具股份有限公司 PDC drill bit with directional easy controllability enhancing performance

Also Published As

Publication number Publication date Type
CN105464599A (en) 2016-04-06 application

Similar Documents

Publication Publication Date Title
US6053263A (en) Cutting element tip configuration for an earth-boring bit
US5372209A (en) Polycentric reamer
CN201924897U (en) Well bore structure of pressure-relief coal bed methane ground extraction well
CN103899253A (en) Drill bit with telescopic blades
CN201943585U (en) Sapphire helical composite jet-nozzle jet-cutting deep well drilling bit
CN102747960A (en) Hybrid drill bit
CN203081445U (en) Polycrystalline diamond rotary digging machine cutting pick
CN201963202U (en) Strong push subsidiary type reamer bit
CN202673149U (en) Mixed bit
CN204386476U (en) Non-planar combined PDC reinforcing teeth-based mono-cone bit
CN105221077A (en) Double-stage drill bit
CN2732975Y (en) Moving-in depth control PDC bit for directional well
CN201351457Y (en) Spiral drag drill bit
CN202900052U (en) Double-acting ultrahard strong lateral-cutting window-opening drill bit with composite teeth
CN204024480U (en) Ploughing type PDC bit suitable for hard stratum
CN204002567U (en) Three-blade particle impact drilling bit
CN2825917Y (en) Long-life PDC hole reaming bit
CN202131984U (en) Novel diamond drill bit
CN203403824U (en) PDC bit
CN204082014U (en) Combined PDC drill bit
CN2462066Y (en) Single gear wheel-fixed cutter composite drill bit
CN202125250U (en) Plug-in type anchor rod drill bit of diamond compact and connection sleeve of same
CN203756040U (en) Double-step self-locking blade of reaming-while-drilling device
CN2890316Y (en) Multistage double-core PDC drill bit
CN203614042U (en) Short PDC drill bit

Legal Events

Date Code Title Description
C14 Grant of patent or utility model