A pdc drill tool with alternating cutting trajectories

A technology of variable cutting and drill bit, which is applied in the direction of drill bit, drilling equipment, earthwork drilling and mining, etc. It can solve the problems that rock breaking cannot be achieved, and achieve the goal of improving self-sharpening and attack ability, increasing eating ability, and improving eating ability. Effect
CN104196456BActive Publication Date: 2017-04-26四川宝石机械石油钻头有限责任公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
四川宝石机械石油钻头有限责任公司
Publication Date
2017-04-26

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Abstract

The invention discloses a PDC drill tool with an alternating cutting trajectory, and belongs to the field of rock breaking tools for drilling equipment. The PDC drill tool with the alternating cutting trajectory comprises an eccentric shaft, an outer shell, a PDC drill and a cycloid shaft. The PDC drill is fixedly connected to the cycloid shaft, the cycloid shaft is matched inside the outer shell and can eccentrically rotate relative to the alternating trajectory, and an eccentric shaft section arranged on the eccentric shaft is matched in an inner cavity of the cycloid shaft to form a revolute pair. An inner flow channel of the eccentric shaft, an inner flow channel of the cycloid shaft and an inner flow channel of the PDC drill are communicated. By the adoption of the PDC drill tool, the alternating cutting trajectory movement can be made, the stratum eating-in capacity of the PDC drill can be improved remarkably, rock breaking efficiency is improved, the abrasion speed of cutting teeth can be better lowered, and in particular, the PDC drill tool has obvious technical advantages in a deep stratum which cannot be drilled easily and in a high hardness and high abrasiveness stratum.
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Description

technical field

[0001] The invention relates to the field of rock-breaking tools for drilling equipment such as petroleum and natural gas, mining engineering, building foundation engineering construction, geology, and hydrology, in particular to a PDC bit tool for rock-breaking for drilling equipment. Background technique

[0002] The drill bit is a rock-breaking tool used in drilling engineering to break the rock at the bottom of the well and form a wellbore. The conventional drill bits used in drilling engineering today mainly include three-cone bits, PDC bits, impregnated diamond bits, and roller-PDC hybrid bits.

[0003] Among them, PDC drill bit (polycrystalline diamond compact drill bit) is the most commonly used drilling tool in oil drilling engineering. With the continuous advancement of cutting tooth material technology and bit design technology, its unique drilling safety, structural flexibility and efficient cutting performance for shearing and breaking rock make...

Claims

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