Specification:

                              The products conform to API Spec 4F" Specification for Drilling , Well Service Derrick and                               Structures". The main parts are in accordance with API Spec 7, 7K, 8A, and meet the
                              demand of firespooling stipulated by API RP 500.

                              Technical Parameters:

Type/Basic Parameters	ZJ15/900J	ZJ20/1350J	ZJ30/1700J	ZJ50/1350DZ	ZJ70/4500DJ
Norminal Drilling Depth 41/2 Drill Pipe mm	1500	2000	3000	5000	7000
Max.Hook Load kN	900	1350	1700	3150	4500
Line Strung of Hoisting System	4 x 5	4 x 5	5 x 6	6 x 7	6 x 7
Diameter of Wireline mm	26	28	32	35	38
Drawworks Horsepower Rating kW	330	490	510	1100	1470
Rotary Table Opening Diameter mm	445	520	520	952.5	952.5
Installed Capacity hp	1 x 1000	2 x 1000	2 x 1200	2 x 1600	2 x 1600
Substructure Height m	2	3.5	4.5	9	9.2