A kind of preparation method of rolling gauge drill bit
A rolling gauge and drill bit technology, which is applied in the direction of drill bits, drilling equipment, earthwork drilling and production, etc., can solve the problems of decreased drilling efficiency, less use, and lowering, and achieve the effect of improving drilling efficiency and reducing friction
Active Publication Date: 2021-01-12
TIANJIN LILIN BIT
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Problems solved by technology
[0005] Due to the above disadvantages of using a roller to reduce the friction between the gauge part and the well wall, this structure is rarely used in practice
[0006] In the prior art, most of the gages are equipped with gage teeth and back reaming holes. The gage teeth are used to cut the well wall, and the friction with the well wall is very large, resulting in a significant decline in drilling efficiency. Therefore, a new type of gage is cut It is very necessary to reduce the friction between the gauge part and the well wall
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Embodiment Construction
[0026] refer to Figure 1 to Figure 5 , which is an embodiment of the present invention, specifically:
[0027] A rolling gauge drill bit, comprising a drill body 1, the drill body 1 includes a knife wing, the knife wing includes a gauge part 2, and the gauge part 2 is provided with a mounting groove 21, and the mounting groove 21 A ball 3 is provided, and the ball 3 is rollingly connected with the installation groove 21, and the cutting tooth 4 is also fixed on the gauge part 2, and the rotation direction of the drill bit is the positive direction, and the cutting tooth 4 is arranged on the The front part of the gauge part 2 is described, the ball 3 is arranged behind the cutting teeth 4, and part of the ball 3 protrudes outside the gauge part 2. Preferably, the highest point of the ball 3 is not higher than the highest point of the cutting tooth 4 . The cutting tooth 4 plays the role of cutting and repairing the well wall, and the gauge part 2 plays the role of gauge for c...
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The invention discloses a rolling gauge protection drill bit and a preparation method thereof. The rolling gauge protection drill bitcomprises a drill bit main body, the drill bit main body comprises a blade, the blade comprises a gauge protection part, a mounting groove is formed in the gauge protection part, balls are arranged in the mounting groove, the ballsare slidably connected to the mounting groove, a cutting teeth is alsofixedly arrangedon the gauge protection part,the rotation direction of the drill bit is taken as the positive direction, the cutting teeth is arrangedonthe front part of the gauge protection part,the ballsarearrangedon the rear part of the cutting teeth, and the ballspartially protrudes outside the gauge protection part. The rolling direction of the balls can be changed at any time,whether when the drill bit is turning or when the well drilling rate changes, the balls can reduce the friction between the gauge protection part and a well wall in a rolling mode, and the well drilling efficiency is improved.
Description
technical field [0001] The invention relates to the field of oil drilling equipment, in particular to a method for preparing a rolling gauge drill bit. Background technique [0002] Reducing the friction force during the drilling process and improving the drilling efficiency can be achieved by reducing the friction coefficient between the gauge part and the well wall or the contact area with the well wall, because the gauge part needs to be compacted For the function of the well wall, the contact area with the well wall should not be too small, otherwise the gage effect will become a cutting effect, and the gage effect will decrease. It is the design difficulty of the gauge part. In the prior art, it is proposed to install a roller on the gage part to reduce the friction coefficient between the gage part and the well wall. For example, the Chinese patent CN201310126849.9-A device that uses rolling action to modify the well wall to enhance the effect of drill bit gage, and ...
Claims
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IPC IPC(8): E21B10/46E21B10/43
CPCE21B10/43E21B10/46
Inventor 薛中学任振龙陈斌高磊刘振伟
Owner TIANJIN LILIN BIT