Modular oil drilling drilling rod

The utility model provides a modular oil drilling drilling rod, includes the body, the first drilling rod of this body coupling, first drilling rod be equipped with hydraulic motor, first drilling rodconnect the second drilling rod, the second drilling rod connect the third drilling rod, third drilling rod surface be equipped with the antirust coat, the third drilling rod connect the fourth drilling rod, the fourth drilling rod in be equipped with the cooler, cooler below be equipped with driving motor, driving motor connect multinomial joint, multinomial joint can install diamond bit, perhaps install the drill collar, again or install roller bit, realize the combination of different length, prolonged modular oil drilling drilling rod's working length, satisfied the well drilling of different degree of depth geological stratification, even atress, antichemical learns the erosion, increase of service life, the different drill bits of having realized make up, satisfy different work condition, simple structure,