Stainless steel seamless pipe for oil well use and method for manufacturing the same

A method for manufacturing a stainless steel seamless pipe for oil well use, comprising the steps of forming a steel pipe by performing pipe making of a steel pipe raw material having a composition containing C:

• 0.05% or less, Si:
• 0.50% or less, Mn:
• 0.20% to 1.80%, P:
• 0.030% or less, S:
• 0.005% or less, Cr:
• 14.0% to 18.0%, Ni:
• 5.0% to 8.0%, Mo:
• 1.5% to 3.5%, Cu:
• 0.5% to 3.5%, Al:
• 0.10% or less, Nb:
• more than 0.20% and 0.50% or less, V:
• 0.20% or less, N:
• 0.15% or less, O:
• 0.010% or less, and the remainder composed of Fe and incidental impurities, on a percent by mass basis, wherein the following formula (1) and the following formula (2) are satisfied and subjecting the resulting steel pipe to a quenching treatment to heat to a temperature higher than or equal to the transformation temperature and, subsequently, cool to a temperature of 100° C. or lower at a cooling rate higher than or equal to the air cooling rate and a tempering treatment to temper at a temperature lower than or equal to the Ac1 transformation temperature,
• Cr+0.65Ni+0.6Mo+0.55Cu−20C≥18.5 (1)
• Cr+Mo+0.3Si−43.3C−0.4Mn−Ni−0.3Cu−9N≤11 (2)
• where Cr, Ni, Mo, Cu, C, Si, Mn, and N:
• content of each element (percent by mass).