Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2019	Jul. 23, 2019
Document And Entity Information [Abstract]
Entity Registrant Name	DRIL-QUIP INC
Entity Central Index Key	0001042893
Trading Symbol	DRQ
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Jun. 30, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q2
Amendment Flag	false
Entity Common Stock Shares Outstanding		36,207,042
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Current Reporting Status	Yes
Entity Shell Company	false
Entity File Number	001-13439
Entity Tax Identification Number	742162088
Entity Address, Address Line One	6401 N. ELDRIDGE PARKWAY
Entity Address, City or Town	HOUSTON
Entity Address, State or Province	TEXAS
Entity Address, Country	US
Entity Address, Postal Zip Code	77041
City Area Code	713
Local Phone Number	939-7711