Features of DC-driven drilling rigs:
The basic parameters of drilling rigs follows the regulations regulated by the industrial standard SY/T5609-1999 the Types of Petroleum Drilling rigs and Basic Parameters.
DC-driven drilling rigs is equipped with the advanced AC-SCR-DC power system in the world, drilling rigs can undertake stepless speed regulation to draw-works, rotary table and mud pump so as to obtain favorable drilling performance; besides, the power system with AC frequency conversion speed control and digital control technology can also adjust lifting speed, rotation speed of rotary table and strokes of mud pump, improve speed control performance and use rate of power of draw-works, rotary table and mud pump.
With parallelogram integrated lifting sub-structure (7.5m, 9m, 10.5m and 12m in height), platform equipment and Derrick can be installed at low position and lifted up completely by draw-works.
Draw-works is equipped with hydraulic pressure disc brake which has the powerful brake function and reliable. Brake pad operating handle is assembled in driller's control room and driller's working position is changed into 'indoor seat type' from 'open type' so as to reduce sharply the laboring intensity of driller.
Since rotary table chain box of draw-works is assembled under derrick floor so that it has large operating space, it is helpful for rotation of chain box and overall conveyance of draw-works, convenient to install rotary table.
Auxiliary brake of draw-works can either equip an eddy current brake or EATON brake which is stable and reliable, also saves labor and easy to control, so that operation life of brake wheel net (disc) and brake block can be extended accordingly. Meanwhile, notch of roller can arrange wire rope properly, and over-wind valve bumping-free bridge crane device is flexible and correct.
Owing to the driving device, rotary table can either be driven directly by motor or draw-works through chain, so that these two sets of driving device can sharply improve reliability of drilling rigs and satisfy the well drilling. The modularized combination and folding cable slot are easy for transportation..
Since drilling rigs is variable, its parts are universal, standardized and has highly home-made rate, so that it is easy to maintain. Since the main parts meet the specifications of API Standard, so that such drilling rigs can participate in the international bidding.
Specifications of Electrical Driven Drilling Rigs:
Features of mechanical driving drilling rigs:
The basic parameters of drilling rigs follows the regulations regulated by the industrial standard SY/T5609-1999 the Types of Petroleum Drilling rigs and Basic Parameters.
Drilling rigs is driven by either diesel engine, hydraulic torque converter and chain transmission box or diesel engine, reducer and narrow V-belt, which provides smooth mechanical power to the draw-works. A number of hoisting speeds and rotary speeds are available.
The draw-works is divided into two sections so as to install the main draw-works near the ground level. The tapered gear box and universal shaft transmit smooth power and are simple to assemble and disassemble.
The main draw-works (grade 40 and 50 ) utilizes pneumatic clutch to shift gears, which are suitable for long distance control, fast and convenient maintenance. The cathead draw-works is equipped with a sand reel .It can be a whole part ,also can be a combined part ,that is easy to lift onto the derrick floor without a heavy-duty crane.
The main brake system utilizes either a band brake or a hydraulic disc brake. And the auxiliary brake uses an Eddy current brake or EATON brake. The system provides a high degree of sensitivity and reliability to reduce the man power.
The chain-driven drilling rigs are driven by the integral enclosed compound chain box and torque converter. During rig moves, the chains can be dismantled for ease of installation.
The substructure is a box-on-box design for easy installation.
It meets the needs of high pressure B.O.P installations.
The rotary table and transmission device are flush with drilling rigs surface, and drilling platform is level so that the operating space is big.
The rotary table and its transmission devise are parallel with drilling surface, so that drilling platform is level with large operating space.
For the combination type of mechanical & electrical drilling rigs, i.e. JD & LD, the draw-works is driven by V-belt or chain transmission drive. The rotary table is driven by an AC motor drive. Owing to the frequency conversion speed control technology, the rotary table realizes stepless speed regulation, which meets the technical requirement of drilling, improves the efficiency and reduce cost of drilling.
