Whether the drill bit and the drilling tool match is one of the factors that determine whether the screw drilling tool can function successfully. The following issues should be paid attention to when selecting:
(1) Drilling scheme and plan;
(2) The blade structure required for the formation;
(3) Structure of drilling fluid circulation channel;
(4) Pre-planned penetration rate;
(5) Using the drill bit, the operating time of the drilling tool is estimated:
(6) the design of the water hole pressure drop of the drill bit.
In addition to the pressure drop caused by the water hole of the bit, no other large pressure loss will be formed when the drilling fluid flows through the bottom of the bit, especially when the water hole pressure drop of the bit has reached the specified pressure drop value of this type of drilling tool, attention should be paid to the appropriate bit.
The design of the liquid passage in the crown of the PDC bit must consider whether the passage flow area may cause excessive pressure loss, and at the same time ensure the timely discharge of rock chips and the cooling requirements of the bit. PDC bits are not only suitable for directional whipping, but also for operations with long drilling cycles, such as drilling straight wells.
The cone bit is suitable for operations with short drilling cycle, such as directional whipping and sidetracking.
Improving the stability of the drive shaft is helpful to improve the life of the drilling tool and the performance of the drill bit. In addition, consider whether many factors such as the geometric size of the drill diamond, the arrangement orientation, and the weight-on-bit load affect the speed and life of the drilling tool.
Shandong Yikuang Science and Technology Drill Pipe, Spiral Drill Pipe, Geological Drill Pipe-Sales Hotline: 13508920928,0635-2311078
