Specifications

crossover sub:
1.API standard
2.Material: AISI 4145H chromium-molybdenum steel

crossover sub

1. It is divided into drill string crossover and tubing Crossover.
2. Drill string Cross-over is divided into type A, type B and type C.

 

Specification

Denotation	Top junction block	Lower junction block	Type
Kelly joint	Kelly	Drill pipe joint	A or B
Kelly joint	Drill pipe joint	Drill pipe joint	A or B
Drill pipe joint	Kelly	Drill collar	A or B
Crossover joint	Drill collar	Drill collar	A or B
Bit joint	Drill collar	Bit	A or B
Swivel joint	Swivel lower joint	Kelly	Type C
Fish joint	Kelly	Drill pipe joint	Type C
	Drill pipe joint	Fishing tool	Type C

 

Mechanical properties

 

O.D. Range	Min. Yield  Strength	Min. Tensile strength	Elongation Min.	Min. Brinell Hardness
3.1/2 THRU  6.7/8	760Mpa	965Mpa	13%	285
7 THRU 10	690Mpa	930Mpa	13%	277