Development Of Turbodrill Testing Device And Its Experimental Research

Turbodrill is a kind of full metal drilling tool.It is very suitable for coring drilling in high hardness geological formation working with diamond impregnated bit.At home and abroad,the method of simulation load to test the turbodrill is generally adopted.But it cannot reflect the actual coupling relationship between the bit and the formation.Aiming at this problem,this paper carried out developing the turbodrill testing device,and some coring drilling experiments.It is of great significance to further turbodrill and drilling technology research.(1)Assisted designed a set of downhole motor drilling experimental system.We built a virtual prototype simulation model by using Solid Works which can help us dynamically design and optimize the key components and the overall structure of the whole system.(2)Designed a set of short section which can measure the mud pressure and torque near the drilling bit.Here we designed the original structure of the short section by CAD doing the feasibility of relevant design structure and verification calculation so that we can have the assembly drawings and the part drawings without any errors.(3)With the successfully built turbo drill platform,we had some coring drilling experiments on two different rock samples measuring and logging those drilling parameters collected by sensors.We analyzed these results and draw the conclusions.After those works above,we got a set of downhole motor drilling experimental system and an efficient set of short section scheme.Finally we had some coring drilling experiments on two different rock samples,and those valuable data will provide analysis basis for coring drilling technology research.