Table 2.

Analysis of potential human related factors affecting drilling performance.

Indicator	Potential factors
	Personnel organization efficiency	Safety responsibility awareness	Construction experience
Teamwork	0.864
Clear assignment of tasks	0.859
Operation training	0.837
Personal safety awareness		0.909
Personal responsibility consciousness		0.890
Drilling experience			0.929
Engineering construction experience			0.754

Factor extraction standard: initial eigenvalues ≥ 80%, extraction method: principal component analysis.