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1. Technical Result Increase in mechanical strength and wearing capacity. 2. Essence A cylindrical body 1 of a protective lid with the bottom 2 and internal thread 6 has a circular shoulder 3, a metal ring 4 fitting tightly the body. The metal ring on one end has a crimp seal 5, which is molded in the body from the bottom side, and another end of it is molded in the crimp seal. The bottom has stiffening ribs 7, ventiducts 8 and slots for a wrench. 3. Field of Application Petroleum industry.
GEAU20040012442004-02-272004-02-27Protective Lid of External Thread for Tubing, Fastening and Well Tubes
GEU20041135Y
(en)