DRILLING AND WELL SERVICING EQUIPMENT
PKNM, Ltd. manufactures drilling and well servicing equipment: Drill Collars, Kellys, HWDP, Non-magnetic Drill Collars,
Subs and Pup-joints.
PKNM, Ltd. has the certificates of the QMS conformity to API Spec. Q1, ISO 9001:2008 and licenses that give a right to put
monograms of API 7‑1. Also the company has the drill pipes, subs and pup-joints’ conformity certificates that meet the
Russian normative documents’ requirements.
The mechanical characteristics of Drill Collars, Kellys, and HWDP correspond to API Spec. 7 – 1.
MECHANICAL CHARACTERISTICS OF DRILL COLLAR, KELLY AND HWDP
| OD, inch | Ultimate Strength, psi, min |
Yield point, psi, min |
Relative elongation, % min |
Brinell Hardness, НВW min |
|
From 3 1/8 up to 6 7/8 |
140 000 | 110 000 | 13 | 285 |
| From 7 up to 11 | 135 000 | 100 000 | 13 | 285 |
