Tricone bit oil storage compensation pressure balancing system

A balancing system and tricone technology, which are applied to drill bits, drilling equipment, earth-moving drilling, etc., can solve the problems of reducing the overall service life of the roller-cone bit, complicated processing, damage to the oil storage bag, etc., and achieve simple structure and integrity. Good, overall height reduction effect

Inactive Publication Date: 2013-01-16
TIANJIN LILIN BIT
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  • Claims
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Problems solved by technology

Since the small pinholes at the bottom of the oil storage bag correspond to the pressure transmission holes, during actual drilling work, the mud entrained cuttings and sediment directly impact the oil storage bag through the pressure transmission holes, resulting in premature damage to the oil storage bag. The overall service life of the roller cone bit is reduced; in addition, due to the stepped structure of the tooth palm oil hole in the existing structure, the processing is more complicated

Method used

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  • Tricone bit oil storage compensation pressure balancing system
  • Tricone bit oil storage compensation pressure balancing system

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Embodiment Construction

[0012] The specific implementation manner of the present invention will be described in detail below in conjunction with the accompanying drawings and preferred embodiments. like figure 1 As shown, a tricone bit oil storage compensation pressure balance system includes a palm oil hole 10 opened on the tooth palm 1, an oil storage bag 4 is arranged in the tooth palm oil hole, and a pinhole is arranged at the bottom of the oil storage bag 41. The pinholes are staggered with the pressure transmission holes 11 provided on the palms. The palm oil hole communicates with the inside of the cone 2 through a channel to provide and compensate lubricating grease. When working, when the oil storage bag is concave inward due to a large external pressure, the pinhole is in a closed state due to the elasticity of the rubber; when the external pressure is less than the grease pre-pressure in the oil storage hole, the oil storage bag The outside of the hole is raised, the pinhole is in an ope...

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Abstract

The invention relates to the technical field of manufacturing of rock bits in oil drilling, in particular to a tricone bit oil storage compensation pressure balancing system. The system comprises a palm oil hole arranged on a palm, an oil storage bag is arranged in the palm oil hole, and a pin hole is arranged at the bottom of the oil storage bag. The system is characterized in that the pin hole and a pressure transmitting hole arranged on the palm are staggered. The system is simple in structure, and when the system is worked, slurry containing gravel and debris impact a lower gland or a disc spring without impacting the oil storage bag directly by staggering the pressure transmitting hole with the pin hole at the bottom of the oil storage bag, so that the service life of the oil storage bag is prolonged, and the service life of a tricone bit is prolonged integrally. A structure of the palm oil hole is simplified and is directly designed to be hollow cylindrical, and processing and improvement of oil hole surface roughness are benefitted.

Description

technical field [0001] The invention relates to the technical field of roller cone bit manufacturing in oil drilling, in particular to a three-cone bit oil storage compensation pressure balance system. Background technique [0002] The analysis of the failure of the tri-cone bit shows that the damage of the bearing is the main form of the damage of the tri-cone bit. Further research shows that the main causes of bearing damage are: the bearing itself has low anti-wear, anti-occlusion and anti-overheating capabilities, which cause early damage to the bearing during operation; the seal oil storage compensation system fails, and the lubrication conditions of the bearing are destroyed. Bearings work in abrasive media, which leads to early failure of bearings; improper use, the actual use parameters exceed the allowable range of bearing design capabilities. Therefore, in order to improve the service life of the drill bit, in addition to improving the wear resistance, seizure res...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B10/22
Inventor 胡友生陈斌俞宪生
Owner TIANJIN LILIN BIT
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