Abstract: A connection for well tubular goods including a male member, a female member, each having a double set of steep tapered hook threads, two internal pressure seals including a compressible primary metal-to-metal seal and a supplementary seal made up of a resilient corrosion resistant material and additionally, a primary resilient corrosion resistant external pressure seal, and a reverse shoulder engagement between the end of the male member and a shoulder on the female member to hold the primary metal sealing surfaces in sealing engagement.

Abstract: A device for gauging hoop stress in a female threaded connector member, the stress being caused by tightening of a tapered male threaded member into the female member, including an annular body dimensioned for surrounding the female member with a firm fit therebetween, the body including two discrete complementary half-sections. Each of the half-sections includes an overlapping segment on one end, and each segment has an aperture therein. A pin is provided for insertion through the aligned apertures. An anchor block is fixed to each of the otherwise free ends of the annular body, each of the blocks having a cutout portion therein. A weak link having a tensile strength less than that of the annular body is provided for insertion into the cutout portions for joining the blocks. The weak link clamps the body about the female member and breaks under the application of a predetermined hoop stress to the female member.