Model Number

K type mast

FEATURES OF MAST

l        Mast (derrick) is generally classified as A type, K type (open front type), tower type and mast type etc.

l        A type mast: its leg section is rectangular or triangle shape, with better loading capacity and stability, connected with pins between sections, installed at low level and erected or lowered down integrally by drawworks and A-frame.

l        K type mast, namely open front mast, its transverse section is a fl shape truss Structure, its both sides are composed of several pieces or segments, its back is rigid frame or pole system of truss, connected with pins or bolts between segments and members, may be installed at Low level and erected or lowered down integrally by drawworks or hydraulic cylinder, has the advantages of convenient installation and teardown, excellent rigidity.

Conforming to API Spec 4F. marked with the official APT monogram.

SPECIFICATIONS OF MAST

Model THN	Max. static load kN	Effective Height m	Top span(front×side)m	Bottom span m	Capacity of racking platform m	Height of racking platform m	Wind withstanding capacity
							Not operating(Without book and full of setback)m/s	Not operating(Without book load and pipe setback)m/s	During rising or lowering m/s
JJ60/31-K	600	31	1.2×1.2	4.8	17	1000	36	47.8	≤8.3
JJ90/38-K	900	38	1.4×1.8	5.5	24.5,25.5, 26.5	1500	36	47.8	≤8.3
JJ35/31-K	1350	31	1.6×1.8	5.3	17,17.5	2000	36	47.8	≤8.3
JJ225/42-K	2250	42	1.9×2	7	24.5,25.5,26.5	4000	36	47.8	≤8.3
JJ225/42-KS	2250	42	1.8×2	5	25.5,26.5	4000	36	47.8	≤8.3
JJ225/43-K	2250	43	1.9×2	8	24.5,25.5,26.5	4000	36	47.8	≤8.3
JJ315/45-K	3150	45	2.3×2.3	8.3	24.5,25.5,26.5	5000	36	47.8	≤8.3
JJ315/45-K	3150	45	2.1×2.05	9.11	24.5,25.5,26.5	5000	36	47.8	≤8.3
JJ315/45-K	3150	45	2.1×2.05	8	24.5,25.5,26.5	5000	36	47.8	≤8.3
JJ170/41-a	1700	41	1.7×2	7.5	24.5,25.5,26.5	3000	36	47.8	≤8.3
JJ450/45-K	4500	45	2.2×2.2	9.11	24.5,25.5,26.5	7000	36	47.8	≤8.3
JJ450/45-K	4500	45.5	2.5×2.3	8.3	24.5,25.5,26.5	7000	36	47.8	≤8.3
JJ450/45-K	4500	45	2.2×2.2	9	24.5,25.5,26.5	7000	36	47.8	≤8.3
JJ450/45-K	4500	45	2.5×2.5	10	24.5,25.5,26.5	7000	36	47.8	≤8.3
HXJJ135/33-KS	1350	33	1.8×1.65	4×4.7	16,16.5, 17.5	2000	36	47.8	≤8.3
NOTE:A-A type, KS-K type, telescope