Engineering roller cone bit
A roller cone bit and engineering technology, which is applied to drill bits, drilling equipment, earth-moving drilling, etc., can solve the problems such as the temperature rise of the roller cone bearing, the inability to guarantee the lubrication of the drill bit, and the effect of affecting the use effect of the roller cone bit, so as to prolong the service life. , The effect of increasing the mechanical speed and saving the cost of drilling
Active Publication Date: 2019-12-03
CANGZHOU GREAT DRILL
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Problems solved by technology
There is no back pressure of high-pressure mud when the drill bit of the oil storage system is used, and there is also a problem that the lubrication of the cone and bearing structure of the drill bit cannot be guaranteed.
When the lubricating grease in the drill bit is lost, it cannot be replenished in a timely and effective manner; it will eventually lead to an increase in the temperature of the roller cone bearing, which will affect the use of the roller cone bit
Method used
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Embodiment Construction
[0016] The present invention will be further described below in conjunction with accompanying drawing.
[0017] Such as Figure 1-3 As shown, the present embodiment provides an engineering roller cone bit, including an engineering bit body 11 and a number of roller cone bit subassemblies 12 arranged at the lower end of the engineering bit body, and said roller cone bit subassemblies 12 are vertically installed downwards On the engineering drill body 11, the roller cone bit assembly 12 includes the cone 1 and the palm 7, the palm 7 is connected with the cone 1 through the palm bearing 5 at the lower end, and the cone 1 is locked by the steel ball 3 . A bearing sealing ring 4 is arranged in the inner hole of the cone 1 to form a bearing chamber with the palm bearing 5, and a pressure oil storage compensation device is provided on the tooth palm to communicate with the bearing chamber. The long oil hole 6 on the palm 7 and the tail end of the long oil hole are connected with an...
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The invention discloses an engineering roller cone bit which comprises a roller cone and a leg. The leg is connected with the roller cone through a leg bearing at the lower end. An inner hole of the roller cone is provided with a bearing sealing ring which is matched with the leg bearing to form a bearing cavity. The leg is provided with a pressure oil storage compensating device communicating with the bearing cavity. The engineering roller cone bit is characterized in that the pressure oil storage compensating device comprises a long oil hole formed in the leg, a sealed oil storage cavity isconnected to the tail end of the long oil hole, and a pressure column body capable of moving up and down is arranged in the sealed oil storage cavity. According to the engineering roller cone bit, inthe using process, the leg bearing emits heat, gas is generated certainly, the gas flows to the direction of a pipe plug of the sealed oil storage cavity, the gas pushes the pressure column body to slide downwards in a pressure column guide pipe to extrude lubricating oil, lubricating oil can be supplemented into the bearing cavity of the roller cone bit in real time, thus it is ensured that the inner hole of the roller cone of the bit, the leg bearing and other components can be lubricated fully from beginning to end, and then the service life of the roller cone bit is prolonged.
Description
technical field [0001] The invention relates to the technical field of drill bits, in particular to an engineering roller cone bit. Background technique [0002] In the prior art, in the construction of engineering drilling, under the geological conditions of interlayer and conglomerate, the roller cone bit is used to drill. Due to its structure, the oiling device of the roller cone bit of the existing structure generally does not have an oil storage system. The disadvantage is that the engineering roller cone bit is in operation, and the loss of lubricating grease cannot be replenished in time, which affects the lubrication effect of the drill bit. lead to tooth loss. Jiangxi Feilong Drill Bit Manufacturing Co., Ltd. Patent No. CN107386984A, engineering roller cone bit. The oil storage system was invented, but when the drill bit is in use, it is not necessary to provide the drill bit with high-pressure mud pressure to break the rock. When the oil storage system drill bit...
Claims
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IPC IPC(8): E21B10/24E21B10/16
CPCE21B10/16E21B10/24
Inventor 孙志健
Owner CANGZHOU GREAT DRILL