CN202417313U - Single cone bit with PDC (Polycrystalline Diamond Compact) teeth - Google Patents

Single cone bit with PDC (Polycrystalline Diamond Compact) teeth Download PDF

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Publication number
CN202417313U
CN202417313U CN201120489659XU CN201120489659U CN202417313U CN 202417313 U CN202417313 U CN 202417313U CN 201120489659X U CN201120489659X U CN 201120489659XU CN 201120489659 U CN201120489659 U CN 201120489659U CN 202417313 U CN202417313 U CN 202417313U
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CN
China
Prior art keywords
pdc
teeth
bit
polycrystalline diamond
cone
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CN201120489659XU
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Chinese (zh)
Inventor
何畏
刘杰
孙宇
汤海平
王向涛
邱亚玲
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西南石油大学
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Priority to CN201120489659XU priority Critical patent/CN202417313U/en
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Publication of CN202417313U publication Critical patent/CN202417313U/en

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Abstract

The utility model relates to a single cone bit with PDC (Polycrystalline Diamond Compact) teeth, and the single cone bit is used for petroleum and natural gas drilling and mainly comprises a cone and a bit body, wherein PDC cutting teeth are inlaid on the cone; PDC gauge protection teeth are inlaid on the tooth palm back of the bit body; the PDC of the PDC cutting teeth is shaped like knife edge and adopts a wedge-shaped hard alloy base as the base; the PDC of the PDC gauge protection teeth is shaped like a flat head and adopts a cylindrical hard alloy base as the base; and the convex corner edges of the PDCs of the PDC cutting teeth and the PDC gauge protection teeth have varying degrees of initial passivation. According to the utility model, the high abrasive resistance of the PDC teeth and the scraping, chiselling and rock breaking mechanisms of the single cone bit are utilized, the tooth shapes of the PDC teeth are optimized and the materials of the PDC teeth are improved to ensure that the single cone bit has the advantages of better shock resistance and wear resistance, higher work efficiency and longer service life.

Description

一种有PDC齿的单牙轮钻头 PDC cutter is a kind of single-cone bit

技术领域 FIELD

[0001] 本实用新型涉及用于石油、天然气钻探的一种有PDC齿的单牙轮钻头。 [0001] The present invention relates to oil and gas drilling PDC cutter has a single cone bit.

背景技术 Background technique

[0002]目前应用的单牙轮钻头主要由牙轮和钻头体等部分组成,牙轮上的切削齿一般采用硬质合金镶齿,呈纵排或螺旋形布置于牙轮上。 [0002] The present application is mainly composed by a single roller cone bit and the bit body and other components, typically cutting teeth on the cone with carbide inserts, a vertically arranged rows or on spiral cone. 钻头的保径主要依靠布置于钻头体牙掌掌背的保径齿,为减小扭转阻力和摩擦热,一般采用出露较高的耐磨切削齿主动保径。 Gauge bit gage teeth mainly depends on the bit body is arranged to the dorsal metacarpal teeth, to reduce the torsional resistance and frictional heat, generally using a high wear of the cutting teeth exposed active gauge. 单牙轮钻头主要依赖牙齿的刮凿作用破碎岩石,牙轮上不同位置的齿在井底形成网状的刮切运动轨迹,从而完成对井底岩石的全面覆盖。 Single cone bit cutting blade depends rock crushing action of the teeth, the teeth on the cone forming a network of different positions of the trajectory at the bottom scraping, thus completing the full coverage of the rock bottom. 刮切的破岩方式要求单牙轮钻头的牙齿具有较强的耐磨性,但是牙轮上的牙齿一般为硬质合金镶齿,牙齿的耐磨能力不足,因此,牙齿的磨损寿命较短是制约单牙轮钻头使用寿命的主要因素。 Rock breaking requires scraping embodiment single cone bit teeth with strong wear resistance, but the teeth on the cone is generally a cemented carbide insert, inadequate wear resistance of teeth, and therefore, the shorter the life of the wear of the teeth is the main factor restricting single cone drill bit life. PDC切削齿的主要组成部分是聚晶金刚石复合片,一般为圆柱形,是在高温高压下将聚晶金刚石烧结在碳化钨一钴衬层上而成。 The main components of the PDC cutter polycrystalline diamond compact, generally cylindrical, is at high temperature and pressure in the sintering polycrystalline diamond on a tungsten carbide-cobalt layer. PDC齿出色的耐磨性使切削齿刃口的钝化速度大大减缓,而自锐性则使已经磨损的切削齿依然能够有效地吃入岩层。 PDC cutter excellent abrasion resistance passivation speed cutting edge of tooth slowed considerably, while the self-sharpening the cutting teeth has been worn still able to effectively eat into the rock. 超强的耐磨性和良好的自锐性,使PDC钻头在软至中硬均质地层中具有相当高的破岩效率和工作寿命。 Superior wear resistance and good self-sharpening, so that PDC bits having relatively high efficiency and working life of breaking rock in soft to medium hard homogeneous formations. 但是PDC齿承受冲击载荷的能力比较差,普通圆柱形切削齿容易发生异常磨损或失效现象,严重影响钻头的钻速和寿命。 However, the relatively poor ability to withstand impact loads of PDC cutter, the cutting teeth generally cylindrical prone to abnormal wear or failure, seriously affecting the drilling rate and life of the drill bit.

发明内容 SUMMARY

[0003] 本实用新型的目的是为了克服现有技术的不足,提供一种有PDC齿的单牙轮钻头,该钻头对PDC切削齿和PDC保径齿进行了结构优化和材料改进,能提高牙齿的抗冲击能力和抗研磨能力,从而延长单牙轮钻头的使用寿命。 [0003] The object of the present invention is to overcome the disadvantages of the prior art, there is provided a single PDC cutter cone drill bit PDC to PDC cutter gage teeth and optimized in structure and materials to improve, enhance impact resistance and resistance to tooth grinding capacity, thereby prolonging the life of a single cone bit.

[0004] 本实用新型的技术方案是:本实用新型一种有PDC齿的单牙轮钻头,主要由牙轮和钻头体组成。 [0004] The technical solution of the present invention are: the present invention is a kind of single-cone bit PDC cutter, mainly composed of a cone and the bit body. 所述牙轮上镶嵌roc切削齿,所述钻头体的牙掌掌背上镶嵌roc保径齿,PDC切削齿的聚晶金刚石复合片为刃形,其基体为楔形硬质合金基体,PDC保径齿的聚晶金刚石复合片为平头形,其基体为圆柱形硬质合金基体;PDC切削齿与PDC保径齿的聚晶金刚石复合片凸角边缘具有不同程度的初始钝化。 The cone inlaid roc cutting teeth, said teeth back Palm Palm bit body inlaid roc gage teeth, the PDC cutting teeth polycrystalline diamond compact is shaped edge, which is wedge-base cemented carbide substrate, the PDC Paul diameter tooth polycrystalline diamond compact flat-shaped head, which is a cemented carbide substrate is a cylindrical substrate; PDC and PDC cutters gauge teeth polycrystalline diamond compact lobes having different degrees of initial edge passivation.

[0005] 本实用新型的有益效果是:1.由于利用了PDC齿的高耐磨性和单牙轮钻头的刮凿破岩机理,具有高寿命和高性价比等优点。 [0005] The beneficial effects of the present invention are: 1. since the scraping rock breaking mechanism PDC cutting teeth single roller bit high abrasion resistance and having a high lifetime and cost advantages. 2.根据单牙轮钻头破岩机理和工作规律的要求,优化了PDC齿的齿形,改进了PDC齿的材料,使PDC切削齿和PDC保径齿具有更好的抗冲击能力和耐磨损能力,具有较高的工作效率和使用寿命。 The working mechanism and the requirements of the law single cone rock breaking, PDC cutter tooth is optimized and improved PDC tooth material, and that the PDC cutter PDC gage teeth having better wear resistance and impact resistance loss of ability to work with high efficiency and service life.

附图说明 BRIEF DESCRIPTION

[0006] 图I为本实用新型一种有PDC齿的单牙轮钻头结构示意图; [0006] FIG structural diagram I single cone bit PDC cutter invention a kind of the present;

[0007] 图2为本实用新型的刃形roc切削齿结构示意图; [0007] FIG. 2 is a schematic view of the new structure of the cutting teeth roc utility knife;

[0008] 图3为图2的左视半剖图; [0008] FIG. 3 is a cross-sectional view of the left half of the view of FIG 2;

[0009] 图4为本实用新型的平头形PDC保径齿结构示意图;[0010] 图5为图4的半剖图。 [0009] FIG. 4 is a schematic view of the new gage blunt shaped toothing PDC present utility; [0010] FIG. 5 is a half cross sectional view of FIG.

[0011] 图中:1. PDC保径齿,2.钻头体,3.沟槽,4. PDC切削齿,5.牙轮,6.大滑动轴承,7.止推球轴承,8.小滑动轴承,9.锁紧网球,10.聚晶金刚石层,11.碳化钨-钴衬层, [0011] FIG.:....... 1 PDC gage teeth, bit body 2, the groove 3, 4 PDC cutters, cone 5, 6 large sliding bearings, thrust ball bearings 7, 8 small. sliding bearing, locking tennis 9, layer 10 of polycrystalline diamond, tungsten carbide 11 -... a cobalt layer,

12.楔形硬质合金基体,13.圆柱形硬质合金基体。 12. The wedge-shaped cemented carbide substrate, 13. The cylindrical cemented carbide substrate.

具体实施方式 Detailed ways

[0012] 下面结合附图对本实用新型的具体实施方式作进一步说明。 [0012] DRAWINGS The present invention will be further described particular embodiment.

[0013] 如图I、图2、图3、图4和图5所示,本实用新型一种有PDC齿的单牙轮钻头,主要由牙轮5和钻头体2组成。 [0013] FIG. I, 2, 3, 4 and 5, the present invention is a kind of single PDC cutter cone bit, a roller 5 and the main bit body 2 composition. 所述牙轮5上镶嵌PDC切削齿4,所述钻头体2的牙掌掌背上镶嵌PDC保径齿1,PDC切削齿4的聚晶金刚石复合片为刃形,其基体为楔形硬质合金基体12,PDC保径齿I的聚晶金刚石复合片为平头形,其基体为圆柱形硬质合金基体13 ;PDC切削齿4与PDC保径齿I的聚晶金刚石复合片凸角边缘具有不同程度的初始钝化。 PDC cutter insert the roller 54, the bit body of the dental insert 2 Palm Palm PDC back gage teeth. 1, PDC cutter polycrystalline diamond compact cutting edge 4 is shaped as a wedge which is rigid base 12 is the alloy matrix, I PDC gauge teeth of polycrystalline diamond compact flat-shaped head, which substrate is a cemented carbide substrate 13 is cylindrical; PDC cutters 4 and the polycrystalline diamond compact PDC gauge convex corner edge having teeth I different degrees of initial passivation.

[0014] PDC切削齿4按照纵排方式交错布置在牙轮5上,PDC保径齿I出露较高,能实现主动保径,沟槽3为排屑槽,可以根据地层和岩性的变化而设计出符合不同要求的尺寸。 [0014] PDC cutters 4 are arranged according to longitudinal rows staggered manner on the cone 5, PDC gauge I exposed tooth higher, to achieve the active gauge, the groove 3 of the flutes, and lithology of the formation may changes designed to meet the different requirements of the size. 在高温高压下,将聚晶金刚石层10烧结在碳化钨一钴衬层11上形成聚晶金刚石复合片,将复合片固结在硬质合金基体上,改进两者的形状,使PDC切削齿4和roc保径齿I的耐磨性和抗冲击性显著提高;同时PDC切削齿4的金刚石复合片的特殊斜面结构设计可以防止复合片局部受力集中,还可以减少复合片脱落和齿刃异常磨损现象的发生,能够应用于软至中硬不均质岩性地层的钻进;由于PDC保径齿I凸角边缘初始钝化,且出露较高,能减小钻头的扭转阻力和与摩擦热,起到良好的主动保径作用。 At high temperature and pressure, the polycrystalline diamond layer 10 forming a sintered polycrystalline diamond compact on a carbide cobalt lining 11, the consolidation of the composite sheet on a cemented carbide substrate, improving the shape of both the PDC cutter 4 and wear resistance and impact resistance gauge teeth roc I significantly increased; while special ramp design PDC cutter diamond compact of the composite sheet 4 can be prevented by partial concentration, may also reduce shedding and the tooth edges of the composite sheet abnormal wear phenomena can be applied to drilling soft to medium hard heterogeneous formation lithology; I due to the PDC gauge lobe tooth edge passivation initial and exposed high torsional resistance can be reduced and the drill bit and frictional heat, play a good role in the active gauge.

Claims (3)

1. ー种有PDC齿的单牙轮钻头,主要由牙轮(5)和钻头体(2)组成,其特征在于,所述牙轮(5)上镶嵌PDC切削齿(4);所述钻头体(2)的牙掌掌背上镶嵌PDC保径齿(I) ;PDC切削齿(4)的聚晶金刚石复合片为刃形,其基体为楔形硬质合金基体(12) ;PDC保径齿(I)的聚晶金刚石复合片为平头形,其基体为圆柱形硬质合金基体(13) ;PDC切削齿(4)与PDC保径齿(I)的聚晶金刚石复合片凸角边缘具有不同程度的初始钝化。 1. ー planted with a single PDC cutter cone bit, mainly by the cone (5) and the bit body (2) composition, characterized in that said mosaic PDC cutter cone (4) (5); the palm palm back teeth bit body (2) of the PDC insert gage teeth (the I); PDC cutting teeth (4) of polycrystalline diamond compact is shaped edge, which is wedge-base cemented carbide base (12 is); Paul PDC diameter tooth (I) of the polycrystalline diamond compact is a flat-shaped head, which is a cemented carbide substrate is a cylindrical substrate (13 is); PDC cutting teeth (4) with the PDC gage teeth (I) of polycrystalline diamond compact lobe with varying degrees of initial edge passivation.
2.根据权利要求I所述的ー种有PDC齿的单牙轮钻头,其特征在于,PDC切削齿(4)按照纵排方式交错布置在牙轮(5)上。 The I according to claim ー planted with a single PDC cutter cone bit, wherein, PDC cutting teeth (4) are arranged according to longitudinal rows staggered manner in the roller (5).
3.根据权利要求I所述的ー种有PDC齿的单牙轮钻头,其特征在干,将聚晶金刚石层(10 )烧结在碳化钨一钴衬层(11)上形成聚晶金刚石复合片,将复合片固结在硬质合金基体上。 According to claim I of the species ー PDC cutter has a single cone bit, characterized in that the dry, the polycrystalline diamond layer (10) forming a sintered polycrystalline diamond compact in a tungsten carbide cobalt lining (11) sheet, the composite sheet consolidated on a cemented carbide substrate.
CN201120489659XU 2011-12-01 2011-12-01 Single cone bit with PDC (Polycrystalline Diamond Compact) teeth CN202417313U (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103410448A (en) * 2013-08-23 2013-11-27 陕西金刚石油机械有限公司 O-shaped loop and metal ring two-way combined sealed oil storage single-cone bit
CN103541660A (en) * 2013-11-07 2014-01-29 西南石油大学 Composite type eccentric one-cone bit
CN104653113A (en) * 2013-11-25 2015-05-27 莱州市原野科技有限公司 Vertical tooth PDC (polycrystalline diamond compact) drill bit polycrystalline diamond clad sheet
CN106639887A (en) * 2016-11-25 2017-05-10 西南石油大学 Drill bit with rotary teeth and single roller cone
CN107255017A (en) * 2016-10-18 2017-10-17 西南石油大学 Arc-shaped tooth one-cone drill bit with natural diamond particles embedded on surface

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103410448A (en) * 2013-08-23 2013-11-27 陕西金刚石油机械有限公司 O-shaped loop and metal ring two-way combined sealed oil storage single-cone bit
CN103410448B (en) * 2013-08-23 2016-03-09 陕西金刚石油机械有限公司 One kind of a metal o-ring seal rings oil composition bidirectional single cone bit
CN103541660A (en) * 2013-11-07 2014-01-29 西南石油大学 Composite type eccentric one-cone bit
CN104653113A (en) * 2013-11-25 2015-05-27 莱州市原野科技有限公司 Vertical tooth PDC (polycrystalline diamond compact) drill bit polycrystalline diamond clad sheet
CN107255017A (en) * 2016-10-18 2017-10-17 西南石油大学 Arc-shaped tooth one-cone drill bit with natural diamond particles embedded on surface
CN106639887A (en) * 2016-11-25 2017-05-10 西南石油大学 Drill bit with rotary teeth and single roller cone
CN106639887B (en) * 2016-11-25 2018-09-14 西南石油大学 Single tooth rotary cone bit

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