WO2013143025A1 - Double-seal system for bearing of cone bit - Google Patents

Double-seal system for bearing of cone bit Download PDF

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Publication number
WO2013143025A1
WO2013143025A1 PCT/CN2012/000420 CN2012000420W WO2013143025A1 WO 2013143025 A1 WO2013143025 A1 WO 2013143025A1 CN 2012000420 W CN2012000420 W CN 2012000420W WO 2013143025 A1 WO2013143025 A1 WO 2013143025A1
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WO
WIPO (PCT)
Prior art keywords
sealing
sealing system
seal
bearing
seals
Prior art date
Application number
PCT/CN2012/000420
Other languages
French (fr)
Chinese (zh)
Inventor
幸发芬
Original Assignee
Xing Fafen
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
Application filed by Xing Fafen filed Critical Xing Fafen
Priority to PCT/CN2012/000420 priority Critical patent/WO2013143025A1/en
Publication of WO2013143025A1 publication Critical patent/WO2013143025A1/en

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/08—Roller bits
    • E21B10/22—Roller bits characterised by bearing, lubrication or sealing details
    • E21B10/25—Roller bits characterised by bearing, lubrication or sealing details characterised by sealing details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7836—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members floating with respect to both races
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7896—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members with two or more discrete sealings arranged in series
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C21/00—Combinations of sliding-contact bearings with ball or roller bearings, for exclusively rotary movement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2352/00—Apparatus for drilling

Definitions

  • the invention belongs to the technical field of roller cone bit bearing sealing. Suitable for sealed roller cone bits for petroleum, geological and engineering applications. Background technique
  • the life of a roller cone bit depends primarily on the bearing.
  • the life of the bearing is mainly determined by the seal.
  • the first task of the seal is to prevent the grease from leaking inside the bearing, and the other is to prevent the mud which is corrosive and abrasive outside the drill bit from invading the bearing. Once the seal fails, the bearing wears out quickly, causing the drill to fail.
  • patents US 5524718, 5655611 use a rubber O-ring seal
  • US 3765495, US 4037673 use a rectangular rubber ring seal, which has the advantages of simple manufacture, shortcomings of short sealing life, and the life of other components of the drill bit. match.
  • the invention is directed to the above-mentioned sealing defects of the roller bit, and is installed in the same sealing groove by two identical sealing members, which simplifies the structure and improves the sealing life.
  • Figure 1 is a view showing a typical structure of the present invention.
  • Figure 2 is a second typical structural diagram of the present invention.
  • Figure 3 is a third exemplary structural view of the present invention.
  • Figure 4 is a fourth typical structural view of the present invention.
  • Figure 5 is a fifth typical structural view of the present invention.
  • Figure 6 is a sixth typical structural view of the present invention.
  • Figure 7 is a typical seal used in the present invention.
  • Figure 8 is a second exemplary seal used in the present invention.
  • Figure 9 is a third exemplary seal used in the present invention.
  • Figure 10 is a fourth exemplary seal used in the present invention. detailed description
  • FIG. 1 is a view showing a typical structure of the present invention.
  • the palm bearing 1 cooperates with the inner bore 2 of the cone to form a bearing for the roller cone bit.
  • the palm bearing 1 comprises a radially pressurized cylinder 3 and a sealing cylinder 5.
  • the radial bearing cylinder 3 and the sealing cylinder 5 in the figure are eccentric and have different diameters.
  • the magnitude of the eccentricity is equal to the radial gap radius of the bearing.
  • the difference in diameter is equal to the value of a radial gap diameter of the bearing.
  • the inner bore 2 of the cone includes a radially pressurized cylinder 4 and a sealing cylinder 6.
  • the sealing groove 7 is composed of a palm bearing seal cylinder 5 and a cone inner bore sealing cylinder 6. In the sealing groove 7, two identical seals 8 and 9 are installed. Seals 8 and 9 are made of rubber.
  • Figure 2 is a second exemplary structural view of the present invention.
  • the difference from Fig. 1 is that in the two sealing rings 8.9, a sealing spacer 10 is also mounted.
  • the spacer 10 is made of a metallic material that isolates the seals 8 and 9 to ensure that the two seals work independently.
  • Figure 3 is a third exemplary structural view of the present invention.
  • the difference from Figure 1 is that the seals in the seal groove are two back-to-back mounted V-shaped composite seals 11 and 12.
  • the V-shaped composite seal is composed of an internal spring and an external rubber.
  • Figure 4 is a fourth typical structural view of the present invention.
  • the difference from Fig. 1 is that the palm bearing 1 is a conventional spur bearing.
  • the radial bearing cylinder 3 of the palm bearing and the sealing cylinder 5 are the same cylinder without eccentricity and diameter difference.
  • Figure 5 is a fifth typical structural view of the present invention. The difference from Figure 4 is that a seal spacer is installed between the two seals.
  • Figure 6 is a sixth typical structural view of the present invention. The difference from Figure 4 is that the seals in the seal groove are two U-shaped spring pre-tight seals 11 and 12 mounted back to back. U-shaped spring pre-tightening seals are made of internal springs and external rubber or plastic.
  • Figure 7 is a typical seal used in the present invention. Its cross-sectional shape is 0-shaped and the material is rubber.
  • Figure 8 is a second exemplary seal used in the present invention. Its cross-sectional shape is X-star and the material is rubber.
  • Figure 9 is a third exemplary seal used in the present invention. Its cross-sectional shape is rectangular and the material is rubber.
  • Figure 10 is a fourth exemplary seal for use in the present invention. Its cross-sectional shape is U-shaped and is a spring pre-tightening seal. The inside is a U-shaped metal spring with a rubber or plastic part on the outside.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Sealing Devices (AREA)

Abstract

A double-seal system for a bearing of a cone bit is mainly formed by a cone leg bearing (1), a cone inner hole (2), two elastic seal members (8, 9), and a seal groove (7). The two elastic seal members (8, 9) are identical and arranged in the same seal groove (7). The two elastic seal members (8, 9) form the double-seal system, thereby improving the seal reliability and the seal life, and further prolonging the service life of the bit.

Description

牙轮钻头轴承双密封***  Roller bit bearing double sealing system
技术领域 Technical field
本发明属于牙轮钻头轴承密封技术领域。适用于石油、地质、工程用的密封型牙轮钻头。 背景技术  The invention belongs to the technical field of roller cone bit bearing sealing. Suitable for sealed roller cone bits for petroleum, geological and engineering applications. Background technique
牙轮钻头的寿命主要取决于轴承。而轴承的寿命主要取决于密封。密封的任务一是防止轴 承内的润滑脂泄漏，二是阻止钻头外部具有腐蚀性和研磨性的泥浆侵入轴承。密封一旦失效， 轴承就会很快地被磨损， 从而导致钻头失效。  The life of a roller cone bit depends primarily on the bearing. The life of the bearing is mainly determined by the seal. The first task of the seal is to prevent the grease from leaking inside the bearing, and the other is to prevent the mud which is corrosive and abrasive outside the drill bit from invading the bearing. Once the seal fails, the bearing wears out quickly, causing the drill to fail.
目前， 牙轮钻头采用的密封主要有两种形式： 橡胶密封和机械密封。  At present, there are two main types of seals for roller cone drills: rubber seals and mechanical seals.
如， 专利 US 5524718、 5655611采用的是一个橡胶 0形圈密封， US 3765495、 US 4037673 采用的是一个矩形橡胶圈密封， 其优点是制造简单， 缺点是密封寿命短， 与钻头其它构件的 寿命不匹配。  For example, patents US 5524718, 5655611 use a rubber O-ring seal, US 3765495, US 4037673 use a rectangular rubber ring seal, which has the advantages of simple manufacture, shortcomings of short sealing life, and the life of other components of the drill bit. match.
专利 CN 201080787Y, US 6033117、 US 6254275 B1采用的是双橡胶密封圈， 它们的优点 是比常规的单橡胶密封圈多了一重密封、 延长了密封寿命， 但是， 结构复杂， 制造难度大。  The patents CN 201080787Y, US 6033117, and US 6254275 B1 use double rubber sealing rings, which have the advantages of one more sealing than the conventional single rubber sealing ring and prolonging the sealing life, but the structure is complicated and the manufacturing is difficult.
另外一种形式的密封是机械密封。 如专利 US 4516641、 US 4666001、 US4923020, 采用的 是由两个橡胶供能密封圈和两个金属密封环组成的机械密封。 其优点是动密封由金属密封面 承担， 延长了密封的寿命， 缺点是制造难度大。 发明内容  Another form of seal is a mechanical seal. For example, patents US 4,516,641, US 4,666,001, US 4,923,020, use a mechanical seal consisting of two rubber energizing seals and two metal seal rings. The advantage is that the dynamic seal is carried by the metal sealing surface, which prolongs the life of the seal, and has the disadvantage of being difficult to manufacture. Summary of the invention
本发明针对牙轮钻头上述密封中的不足， 采用两个完全相同的密封件安装在同一个密封 槽中， 简化了结构， 提高了密封寿命。 附图说明  The invention is directed to the above-mentioned sealing defects of the roller bit, and is installed in the same sealing groove by two identical sealing members, which simplifies the structure and improves the sealing life. DRAWINGS
图 1是本发明的一种典型结构图。 - 图 2是本发明的第二种典型结构图。  BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a view showing a typical structure of the present invention. - Figure 2 is a second typical structural diagram of the present invention.
图 3是本发明的第三种典型结构图。  Figure 3 is a third exemplary structural view of the present invention.
图 4是本发明的第四种典型结构图。  Figure 4 is a fourth typical structural view of the present invention.
图 5是本发明的第五种典型结构图。  Figure 5 is a fifth typical structural view of the present invention.
图 6是本发明的第六种典型结构图。  Figure 6 is a sixth typical structural view of the present invention.
图 7是本发明所用的一种典型密封圈。  Figure 7 is a typical seal used in the present invention.
图 8是本发明所用的第二种典型密封圈。  Figure 8 is a second exemplary seal used in the present invention.
图 9是本发明所用的第三种典型密封圈。  Figure 9 is a third exemplary seal used in the present invention.
图 10是本发明所用的第四种典型密封圈。 具体实施方式  Figure 10 is a fourth exemplary seal used in the present invention. detailed description
图 1是本发明的一种典型结构图。牙掌轴承 1与牙轮内孔 2配合，形成牙轮钻头的轴承。 牙掌轴承 1包括径向承压圆柱体 3和密封圆柱体 5。图中的径向承压圆柱体 3与密封圆柱体 5 间有偏心， 且直径有差异。 偏心的大小等于轴承径向间隙半径值。 直径的差异值等于轴承的一 径向间隙直径值。 牙轮内孔 2包括径向承压圆柱体 4和密封圆柱体 6。 密封槽 7由牙掌轴承 密封圆柱体 5和牙轮内孔密封圆柱体 6组成。 在密封槽 7中， 安装了两个完全相同的密封件 8和 9。 密封件 8和 9由橡胶制作而成。  BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a view showing a typical structure of the present invention. The palm bearing 1 cooperates with the inner bore 2 of the cone to form a bearing for the roller cone bit. The palm bearing 1 comprises a radially pressurized cylinder 3 and a sealing cylinder 5. The radial bearing cylinder 3 and the sealing cylinder 5 in the figure are eccentric and have different diameters. The magnitude of the eccentricity is equal to the radial gap radius of the bearing. The difference in diameter is equal to the value of a radial gap diameter of the bearing. The inner bore 2 of the cone includes a radially pressurized cylinder 4 and a sealing cylinder 6. The sealing groove 7 is composed of a palm bearing seal cylinder 5 and a cone inner bore sealing cylinder 6. In the sealing groove 7, two identical seals 8 and 9 are installed. Seals 8 and 9 are made of rubber.
图 2是本发明的第二种典型结构图。 与图 1 的区别是在两个密封圈 8 9中， 还安装了 密封隔片 10。 隔片 10由金属材料制作， 可隔离密封圈 8和 9， 确保两个密封圈独立地工作。 图 3是本发明的第三种典型结构图。 与图 1 的区别是， 密封槽中的密封件是两个背靠背 安装的 V-形复合密封件 11和 12。 V形复合密封件是由内部的弹簧和外部的橡胶组成的。 Figure 2 is a second exemplary structural view of the present invention. The difference from Fig. 1 is that in the two sealing rings 8.9, a sealing spacer 10 is also mounted. The spacer 10 is made of a metallic material that isolates the seals 8 and 9 to ensure that the two seals work independently. Figure 3 is a third exemplary structural view of the present invention. The difference from Figure 1 is that the seals in the seal groove are two back-to-back mounted V-shaped composite seals 11 and 12. The V-shaped composite seal is composed of an internal spring and an external rubber.
图 4是本发明的第四种典型结构图。 与图 1的区别是， 其牙掌轴承 1采用的是常规的牙 掌轴承。牙掌轴承的径向承压圆柱体 3和密封圆柱体 5是同一个圆柱体，没有偏心和直径差。  Figure 4 is a fourth typical structural view of the present invention. The difference from Fig. 1 is that the palm bearing 1 is a conventional spur bearing. The radial bearing cylinder 3 of the palm bearing and the sealing cylinder 5 are the same cylinder without eccentricity and diameter difference.
图 5是本发明的第五种典型结构图。 与图 4的区别是， 在两个密封圈间安装有密封隔片 Figure 5 is a fifth typical structural view of the present invention. The difference from Figure 4 is that a seal spacer is installed between the two seals.
10。 10.
图 6是本发明的第六种典型结构图。 与图 4的区别是， 密封槽中的密封件是两个背靠背 安装的 U-形弹簧预紧密封件 11和 12。 U-形弹簧预紧密封件是由内部的弹簧和外部的橡胶或 塑料制成的。  Figure 6 is a sixth typical structural view of the present invention. The difference from Figure 4 is that the seals in the seal groove are two U-shaped spring pre-tight seals 11 and 12 mounted back to back. U-shaped spring pre-tightening seals are made of internal springs and external rubber or plastic.
图 7是本发明所用的一种典型密封件。 其截面形状为 0-形， 材质为橡胶。  Figure 7 is a typical seal used in the present invention. Its cross-sectional shape is 0-shaped and the material is rubber.
图 8是本发明所用的第二种典型密封件。 其截面形状为 X-星形， 材质为橡胶。  Figure 8 is a second exemplary seal used in the present invention. Its cross-sectional shape is X-star and the material is rubber.
图 9是本发明所用的第三种典型密封件。 其截面形状为矩形， 材质为橡胶。  Figure 9 is a third exemplary seal used in the present invention. Its cross-sectional shape is rectangular and the material is rubber.
图 10是本发明所用的第四种典型密封件。其截面形状为 U-形，是一种弹簧预紧密封件。 内部是 U-形金属弹簧， 外部是橡胶件或塑料件。  Figure 10 is a fourth exemplary seal for use in the present invention. Its cross-sectional shape is U-shaped and is a spring pre-tightening seal. The inside is a U-shaped metal spring with a rubber or plastic part on the outside.

Claims

、 一种牙轮钻头轴承双密封***， 主要由牙掌轴承、 牙轮内孔、 一个密封槽、 两个弹性密封 件组成。 The utility model relates to a double sealing system for a roller cone bit bearing, which mainly comprises a tooth bearing, a toothed inner hole, a sealing groove and two elastic seals.
、 根据权利要求 1所述的密封***， 一个密封***只有一个密封槽。 The sealing system of claim 1 wherein a sealing system has only one sealing groove.
、 根据权利要求 1所述的密封***， 组成一个密封***的两个弹性密封件完全相同。 The sealing system of claim 1 wherein the two elastomeric seals that make up a sealing system are identical.
、根据权利要求 3所述的密封***，弹性密封件可以采用 0-形、矩形、 X-星形, V-形、 U-形、The sealing system according to claim 3, wherein the elastic seal can be 0-shaped, rectangular, X-star, V-shaped, U-shaped,
Y-形等多种形式橡胶密封圈， 也可采用金属弹簧加橡胶或塑料的弹簧预紧密封圈。 、 一种牙轮钻头轴承双密封***， 主要由牙掌轴承、 牙轮内孔、 一个密封槽、 两个弹性密封 件、 一个密封隔片组成。 Y-shaped and other forms of rubber sealing ring, metal spring plus rubber or plastic spring pre-tightening ring can also be used. The utility model relates to a double sealing system for a roller cone bit bearing, which mainly comprises a tooth bearing, a toothed bore, a sealing groove, two elastic seals and a sealing spacer.
、 根据权利要求 5所述的密封***， 一个密封***只有一个密封槽。 The sealing system of claim 5 wherein the sealing system has only one sealing groove.
、 根据权利要求 5所述的密封***， 组成一个密封***的两个弹性密封件完全相同。 The sealing system of claim 5 wherein the two elastomeric seals that make up a sealing system are identical.
、根据权利要求 3所述的密封***，弹性密封件可以采用 0-形、矩形、 X-星形 , V-形、 U-形、The sealing system according to claim 3, wherein the elastic seal can be 0-shaped, rectangular, X-star, V-shaped, U-shaped,
Υ-形等多种形式橡胶密封圈， 也可采用金属弹簧加橡胶或塑料的弹簧预紧密封圈。 、 根据权利要求 5所述的密封***， 其密封隔片由金属材料制做。 Various types of rubber seals, such as Υ-shape, can also be used with metal springs and rubber or plastic spring pre-tightening seals. The sealing system according to claim 5, wherein the sealing spacer is made of a metal material.
PCT/CN2012/000420 2012-03-30 2012-03-30 Double-seal system for bearing of cone bit WO2013143025A1 (en)

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4466621A (en) * 1982-11-29 1984-08-21 Rock Bit Industries U.S.A., Inc. Rotary drill bit multiple seal assembly
US4516641A (en) * 1983-10-17 1985-05-14 Hughes Tool Company-Usa Earth boring bit with pressure compensating rigid face seal
CN2259868Y (en) * 1995-07-31 1997-08-20 江汉石油管理局钻头厂 Teethed wheel type tooth drill bit
US6033117A (en) * 1995-12-19 2000-03-07 Smith International, Inc. Sealed bearing drill bit with dual-seal configuration
CN2464923Y (en) * 2000-09-28 2001-12-12 江汉石油钻头股份有限公司 Bearing seal device
US6679342B2 (en) * 1995-12-19 2004-01-20 Smith International, Inc. Dual-seal drill bit pressure communication system
CN201202404Y (en) * 2008-01-30 2009-03-04 天津立林钻头有限公司 Seal device for petroleum drill bearing
CN201358715Y (en) * 2008-12-30 2009-12-09 天津立林钻头有限公司 Oil roller bit floating sealing device

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4466621A (en) * 1982-11-29 1984-08-21 Rock Bit Industries U.S.A., Inc. Rotary drill bit multiple seal assembly
US4516641A (en) * 1983-10-17 1985-05-14 Hughes Tool Company-Usa Earth boring bit with pressure compensating rigid face seal
CN2259868Y (en) * 1995-07-31 1997-08-20 江汉石油管理局钻头厂 Teethed wheel type tooth drill bit
US6033117A (en) * 1995-12-19 2000-03-07 Smith International, Inc. Sealed bearing drill bit with dual-seal configuration
US6679342B2 (en) * 1995-12-19 2004-01-20 Smith International, Inc. Dual-seal drill bit pressure communication system
CN2464923Y (en) * 2000-09-28 2001-12-12 江汉石油钻头股份有限公司 Bearing seal device
CN201202404Y (en) * 2008-01-30 2009-03-04 天津立林钻头有限公司 Seal device for petroleum drill bearing
CN201358715Y (en) * 2008-12-30 2009-12-09 天津立林钻头有限公司 Oil roller bit floating sealing device

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