Automatic switching three-way circulation joint for oil well

• Main Author: JIE,CHEN SU
• Format: Patent
• Language: English
• Published: 03.05.2006
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS

The invention discloses an oil well self-switching three-way circulation joint, which comprises the following parts: inner channel of oil pipe on the inner top of three-way circulation joint, reverse circulation channel and three-way short-circuit upper outlet, three-way short-circuit lower outlet i...