Abstract: A perforation gun comprising a charging unit and an outer hollow carrier, wherein the hollow carrier is made of a seamless steel pipe, wherein the seamless steel pipe is produced by tempering a tubular steel body at a holding temperature of >450° C., the seamless steel pipe having a high burst strength and at least over part of its length having a yield strength Rp0.2 of >1050 MPa, and the seamless steel pipe having a grain structure with an average grain size of <15 ?m, and the tubular steel body having been manufactured from a steel alloy, which steel alloy comprises, besides iron and inevitable impurities, the following alloying elements in mass-%: C 0.22-0.30% Mn 0.7-1.2% Si 0.13-0.38% Cr 0.7-1.2% Mo 0.5-0.8%.

Abstract: A pipe system for oil country tubular goods (OCTG) and a method of manufacturing the OCTG pipe system is disclosed. The pipe system includes at least one OCTG pipe having a pipe body, the pipe body having at least one connection end formed in unipartite and materially integral manner with the pipe body for coupling to a second OCTG pipe. The OCTG pipe is formed in seamless fashion from a hardenable steel alloy, and the connection end has a yield strength higher than the yield strength of the pipe body.

Abstract: A pipe system for oil country tubular goods (OCTG) and a method of manufacturing the OCTG pipe system is disclosed. The pipe system includes at least one OCTG pipe having a pipe body, the pipe body having at least one connection end formed in unipartite and materially integral manner with the pipe body for coupling to a second OCTG pipe. The OCTG pipe is formed in seamless fashion from a hardenable steel alloy, and the connection end has a yield strength higher than the yield strength of the pipe body.

Abstract: According to the present invention, a seamless steel pipe for use in cases where internal pressure is applied is disclosed, the seamless steel pipe having been produced by tempering a tubular steel body at a holding temperature of >450° C., the seamless steel pipe having a length extending between a first end and a second end, the seamless steel pipe having a high burst strength and at least over part of the length having a yield strength Rp0.2 of >1050 MPa, and the seamless steel pipe having a grain structure with an average grain size of <15 ?m, and the tubular steel body having been manufactured from a steel alloy, which steel alloy comprises, besides iron and inevitable impurities, the following alloying elements in mass-%: C 0.22-0.30% Mn 0.7-1.2% Si 0.13-0.38% Cr 0.7-1.2% Mo 0.5-0.8%. In addition, a method of producing a high strength seamless steel pipe, usage of a seamless steel pipe and a perforation gun are disclosed.