How to Match the SZJ40 2250CZ to Your Project
Adding a 4000 m unit to a mixed drilling fleet usually means choosing between a truck that drives itself and a trailer that waits for a tractor — the SZJ40 2250CZ truck mounted drilling rig is the self-propelled end of that argument, chosen whenever the corridor will not take a tractor-and-trailer convoy. The derrick, drawworks and rotary come pre-installed on a heavy off-road chassis: 4000 m nominal depth on 114 mm pipe, a 2250 kN static hook load, an 800 kW main drawworks and a ZP375 rotary table, with AC variable-frequency drive on the main hoist and hydraulic power for the auxiliary functions. It raises its own hydraulic folding derrick with no external crane, and the low, centred layout is what lets it reach the narrow mountain pads a 4000 m rig normally cannot.
Three questions size this truck-mounted unit correctly: whether your pads have grid power or need the optional full-diesel configuration, since AC VFD assumes a reliable site supply; the axle and over-dimension permit on your mountain road corridor, because a self-propelled 2250 kN unit is a heavy road vehicle in its own right; and the mud and solids control spread you plan to tow behind, for which we reserve mounting interfaces on the matched pump, tanks and skid.
Your quotation will scope the delivered package — rig, power, mud and solids control, and the first spare-parts box — so the figure you compare against a towed-trailer alternative is the figure you actually pay. Send the well list and road profile and we will confirm whether self-propelled or towed wins on your mileage.