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Roller cone bit with labyrinth seal/bearing protection structure

A drill bit and bearing technology, applied in drill bits, drilling equipment, earth-moving drilling, etc., can solve problems such as tearing of seals 60

Active Publication Date: 2016-03-30
山特维克矿山机械工程工具股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, if the size (or number) of abrasive particles is large enough, it can cause tearing of the seal 60

Method used

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  • Roller cone bit with labyrinth seal/bearing protection structure
  • Roller cone bit with labyrinth seal/bearing protection structure
  • Roller cone bit with labyrinth seal/bearing protection structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] Reference attached Image 6 , Which illustrates a partial cross-sectional view of a roller cone bit showing an embodiment of the improved labyrinth seal / bearing protection structure. Similar reference signs refer to Figure 1-Figure 5 Similar parts in the. Image 6 The improved labyrinth seal / bearing protection structure in the Figure 4 The 90-ring protection shown is similar to the L-shaped (cross-section) labyrinth seal / bearing protection 190 ring protection. However, different head and cone geometries are provided to support the installation of the labyrinth seal / bearing protector 190 ring and the introduction of the swirl 180 in the fluid path between the seal 60 and the outer environment 84. Although a closed bearing including the seal 60 in the gland 64 is used, it will be understood that the labyrinth seal / bearing protector 190 ring passes through the fluid passage between the bearing 10 and the outer environment 84 in an open bearing (without seal) The introduct...

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PUM

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Abstract

Drilling tools include a cone mounted for rotation on a bearing shaft extending from a drill bit. The cone has a first planar base surface opposite the second planar base surface of the bit. A first annular groove is formed in the first planar base surface, and a second annular groove is formed in the second planar base surface. The first and second annular grooves are at least partially aligned with each other and the combination of the first and second annular grooves forms a first annular gland. A protector ring is inserted into the first annular gland and functions to divide the fluid path between the bearing shaft of the drilling tool and the outside environment into a plurality of parallel passages through the protector ring. Each parallel fluid path includes a convolution defined by a plurality of fluid direction changing corners.

Description

Technical field [0001] The invention relates to a rock drill bit drilling tool. The present invention more specifically relates to a roller cone drilling tool, and a protective mechanism for bearing seals in such a roller cone drilling tool. Background technique [0002] Cone rock bit is a commonly used cutting tool used in oil, gas, mining and other fields, formed by penetrating the formation and forming a wellbore. reference figure 1 , It illustrates a partial cross-sectional view of a general roller cone rock bit. figure 1 A head and cone assembly is illustrated in particular detail. The general structure and operation of this drill bit are well known to those in the field. [0003] The head 1 of the drill contains a bearing shaft 2. The cutting cone 3 is rotatably located on the bearing shaft 2 which can function as a journal. The body part 4 of the drill bit includes an upper portion, which is generally threaded to form a tool joint connection that facilitates the connecti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B10/25
CPCE21B10/23E21B10/25E21B10/22
Inventor T·高利福特
Owner 山特维克矿山机械工程工具股份有限公司