Drawworks

Brief Introduction

Drawworks is the core part of Drilling Rig. it is used for operation of lifting or laying down mast, hoisting or descending drilling tools and casings.


Gear driven drawworks are now the industry standard when it comes to oil & gas drilling rigs. The major reasons are improved safety, optimal performance & control, significant weight & size reduction, and considerably increased reliability. Combining the different performance characteristics of a dynamic emergency brake, a regenerative brake via the drive motors, with an intelligent automated Drawworks Control package provides a higher standard.

 PIINC drawworks were pioneers in this field and continue to be the industry standard.


 Gear Driven Drawworks are avialable in various sizes and configurations.


 PIINC offers 3 different drilling drawworks concepts which provide the most advanced drawworks in the industry.


 PIINC also manufactures custom drawworks designed and engineered to our customer's requirements. We welcome any inquiries.


Technical performances and structure features

1. All bearings are rolling bearings . The shafts are made of alloy steel.

2. The chains are pressure lubricated.

3. The drum is grooved. The low-speed & high-speed ends of the drum shaft are equipped with ventilating pneumatic tube clutch. The brake rim (or disc) is water cooled and the surface is medium-frequency induction hardened that provides excellent wear-resistance capacity and long service life.

4. The contours of the sprocket teeth are medium frequency induction hardened. All transmission clutches are of involute spline type.

5. The main brake is hydraulic disc brake, and the auxiliary brake is electromagnetic eddy current brake or EATON brake.

Technical Performances and Structure Features of the Single-shaft Electric Drawwork

1.The drawwork is single-shaft with grooved drum structure, has less spare parts, small cubage, light weight compared with the products of the same kind.

2.The drum shaft is driven by the gear reducer which power originate from a DC or AC-VF motor,it can also be driven by compound operation of two motors. AC-VF motor make the drawworks has a wider timing scope, the speed can be regulate smoothly between 0-140Hz.

3.High transmission efficiency gear, small oscillation, low noise, long service life.

4.The main brake of the drawworks is hydraulic disc brake while the auxiliary brake is energy- consumption brake or EATON brake.

5.The drawworks is equipped with independent numerical-control AC-VF transmission device and automatic control system(ACS),it can feed bit automatically; Real-time monitoring and analysising of bit feeding and infixing, get the optimal drilling.

Main technical specifications