Airtight oil well pipe is connected to no coupling

• Main Authors: ZHANG YUNSAN, WANG HONGBING, GUO HUANRAN, ZHANG SONGJIANG, ZHANG HONGHAI
• Format: Patent
• Language: English
• Published: 05.08.2015
• 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 utility model discloses an airtight oil well pipe is connected to no coupling belongs to oil well pipe technical field, including the oil well pipe body, the first end of oil well pipe body is equipped with the thread connection section, and the second end is equipped with the female connection section, the thread connection section includes external screw thread, male cone (strobilus masculinus), outer annular arch, first outer inclined plane and the outer inclined plane of second, the female connection section include with the internal thread of external screw thread looks adaptation, with the interior annular of outer cone facial features adaptation is protruding, with the interior conical surface of outer annular protruding looks adaptation, with in first outer inclined plane looks adaptation first the inclined plane and with inclined plane in the second of the outer inclined plane of second looks adaptation. The utility model discloses satisfied the demand of oil field to no coupling oil well pipe, had stronger gas sealing performance simultaneously under big load, big crookedness condition.