This series of skid-mounted drilling rigs include three models that are respectively ZJ40/2250J, ZJ40/2250LDB and ZJ40/2250L. They are suitable for being applied in drilling engineering to drill wells with the depth lower than 4000m. They can be used in different environments such as shallow sea areas, beaches, desert and cold areas based on the need of customers.

• The key components of the ZJ40/2250J skid-mounted drilling rig are all driven by mechanical transmission. The machine offers high cost-effectiveness and is easy to operate and maintain.
• The winch primarily uses a sealed chain drive system, equipped with an auxiliary drive device for emergency hoisting of the derrick. The winch features an integrated composite chain drive box design, resulting in a low failure rate and simplified operation and maintenance. Both the lower base (including the rear base) and the drill platform base of the drilling rig adopt a modular design, with each skid connected by pins, eliminating the need for complex welding. This structure allows for rapid assembly and disassembly of the drilling rig, facilitating its relocation between drilling teams, and is particularly suitable for cluster well operations requiring frequent whole-unit towing.

• The rotary table and drawwarks are driven separately. The rotary speed and torch of the rotary table and the mud pump can be regulated respectively according to the requirement of drilling technologies. These advantages make automatic drilling possible.
• The rotary table and automatic drilling device of this boring machine adopt AC variable frequency full-digital automatic control technology. Thus this ZJ40/2250LDB skid-mounted drilling rig has the function similar to numerically controlled variable frequency electric drilling machine. Compared with the electric drilling machine, our product has lower running cost.

• Made of H-sectional steel, the derrick of our skid-mounted drilling rig is designed in a “K” shape. The derrick has open working visual field and is easy to be moved.
• Block type substructure allows the drawworks and the derrick to be mounted in a low position. The derrick can be lifted with the power provided by the drawworks.
• The drawworks is equipped with a sealed chain transmission system. The transmission system is composed of 4 forward gears and 2 reverse gears (or 6 forward gears with 2 reverse gears). Auxiliary driving device is also available for lifting the derrick in emergent situations.
• Most of the operations can be done in the integrated driller control cabin.
• The transmission system connected by universal shafts is easy to assemble and disassemble.
• Designed with a seasonable block structure, the skid-mounted drilling rig can be hoisted integrally or transported by train or automobile in block.
• This drilling machine is highly mechanized and can work in various environments.