Open AccessEvaluation on Efficient Crushing Test in Deep Poor Drillability Formation
Author(s) -
Yongqian Ma,
Ru Shao,
Xiaolan Liu
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/898/1/012019
Subject(s) - abrasion (mechanical) , borehole , rate of penetration , geology , drilling , instability , penetration rate , impact resistance , high pressure , materials science , mining engineering , geotechnical engineering , metallurgy , composite material , engineering , mechanics , engineering physics , physics
The ancient formation is very thick, strong abrasion and poor drillability. Formation pressure of some area is abnormal high-pressure, induced high mud density, and borehole instability problems in some formation restrict the positive displacement motor (PDM) application, and impact drilling tools are instable. All above factors restraint the rate of penetration. Based on the result of litho-mechanical experiments, the impacting experiments are performed on samples of the Jurassic formation, impact fractured efficiency are evaluated, the results show high impact resistance in the formation, the best impact speed is over 12m/s, and the result was important design basis for impact tools improvement to increase the rate of penetrate (ROP) in the deep poor drillability formation.