How to Match the ZJ30L-J to Your Project
Planning a 3000 m drilling programme means sizing the rig to the upper-end wells, not the average, and the ZJ30L-J mechanical land drilling rig is the lightweight answer for that middle band. On 114 mm pipe, it pairs a 1700 kN hook with a 560 kW drawworks over a ZP275 table, retaining the diesel-only mechanical reliability crews already know, and the trimmed box substructure and derrick ship as road-sized loads, opening alpine and weight-restricted sites a standard ZJ30 cannot serve. A 35 MPa standpipe and 10-line hoist give it enough reserve for demanding workover and old-well stimulation, rather than new boreholes alone — the point below which a 2000 m-class land unit runs out of headroom. It is favoured for coal-seam gas and medium-depth thermal projects where the unit must drill one week and relocate the next.
Before requesting a ZJ30L-J drilling rig quotation, send the well design envelope and the workover side of the budget. State the maximum planned depth, the expected tubing pull loads for recompletion, and the mud pump pressure your reservoir programme needs, since the 35 MPa circulating system is a deliberate step up from shallow units. Describe the worst transport module weight your roads and bridges allow — that is the constraint the L-J split is designed around. Off-grid diesel drive is standard, and we tune the cold-start, dust and corrosion packages to plains, Gobi or alpine service.
Because the derrick, substructure and power-skid split are engineered to the route, the ZJ30L-J is quoted project by project rather than from a catalogue. Every machine leaves a build dossier on file, so consumables and spares can be matched years later — useful for contractors running multi-rig fleets overseas; send the heaviest module weight and the commercial reply carries transport notes.
