(1) the nominal drilling depth (5 "7000m pipe)

(2) the maximum hook load 4500kN

(3) the maximum drill column weight 2520kN

(4) lifting system of 6 × 7 along the rope wear

(5) the drilling wire rope diameter φ 38.1m

(6) rated input power winch 1940kW (2600hp)

(7) winch speed stepless speed regulation

(8) the opening diameter φ 950mm (371 / 2 inch

(9) rated x number of mud pump

1176kW (1600HP) × 3

(10) the effective height / derrick type 45m/ K

(11) the floor height 10.5m

The floor area of 126m2 (11.4m * 11.08m)

(12) the base 9.2m of headroom

(13) supply system

The gas tank capacity of 2 × 3 m 3 +2m3

Maximum working pressure of 1MPa

(14) double pipe pressure manifold 4 "× 35MPa

(15) the total installed power of 5200kW drilling rig

The main generator diesel engine model CAT3512B × 4

Type of generator SR4B

Generator power 1200kW * 4

Voltage 690V

Auxiliary power unit model CAT3412 400kW

Type of generator SR4B

Voltage 400V

(16) the transmission mode of AC-VFD-AC

(17) the total power of AC variable frequency motor 5885kW

Winch motor 970kW x 2

Mud pump motor 1100kW x 3

Turntable motor 600kW

Winch accessory drive motor 45kW

(18) inverter speed control cabinet

Number 5

Rated output voltage 0 ~ 690V (AC)

Efficiency rating of 97%

The main characteristics of drilling rig

(1) the electronic control system of ZJ70DBS drilling rig is built on the bus communication technology on the basis of the digital control system, automatic control of variable frequency system and the various functional components, use the program to ensure the efficient, safe operation of the whole system. The drilling machine drilling parameters and electrical parameters control, display,collection, storage and transmission system more perfect, to create the necessary conditions for drilling engineering information, intelligent.

(2) the ZJ70DBS drilling rig electric drive system: in order to meet therequirements of strengthening the drilling technology, drilling machine equipped with 4 sets of 1200kW numerical control injection of main diesel generator and 1sets of 400kW auxiliary power unit, to provide power for the drilling rig. 3 sets of 1600HP mud pump respectively by single frequency power 1100kW (continuous power up to 1176kW) AC variable frequency motor drive; winch is powered by 2970kW AC frequency conversion motor, winch equipped with 45kW auxiliary drivemotor, with automatic driller and emergency operation function; independent drive turntable is composed of 1 600kW AC variable frequency motor. The main motor system selected 690V European standard, can greatly reduce themanufacturing cost, simplifies transmission. Drive drawworks, rotary table andmud pump adopts AC frequency conversion technology of direct torque control,the main function of the realization of digital program control rig. Winch to realize dynamic braking and NC constant drilling pressure automatic drill bit feeding.

(3) the turntable is directly driven by the 1 600kW frequency conversion motor through a universal shaft, the rotary speed can be adjusted continuously in the range of 0 ~ 300r/min. Motor dynamic characteristics of soft, large speed range and high torque capacity, the normal work of the maximum torque of 32.36kN.m.The control system has perfect monitoring and torsion protection function,protection of torque value can be set arbitrarily in the 0 to 100% range.Therefore, in the process of drilling, can accurately judge the running status bits,avoid the cone and other accidents, ensure maximum drilling works smoothly.Turntable with inertia brake, and linkage control electric drive, automatic brakingto ensure power, to avoid accidents during operation.

(4) the winch arrangement low, make the table more spacious, but also reduce the vibration table, also facilitate hoisting winch. JC70DB uniaxial winch gear,stepless speed regulation, has the advantages of light weight, small volume,small amount of maintenance. Winch speed and control the energy consumption braking and AC frequency conversion control, under normal circumstances,hydraulic disc brakes only parking, positioning and emergency stop function, butalso has a manual control lowering function. Winch all operating parameters,including the drilling speed, hook position, various security settings, CNC frequency automatic drill bit feeding, energy consumption braking function,through the computer and the electronic control system to realize full digitalcontrol.

(5) the comprehensive international advanced derrick base director, combined with the characteristics of the drilling rig down, give full consideration to the domestic materials and process technology, the first section of derrick and the base are combined into a whole, a spiral model, rig derrick hoisting in placetogether with the. Connecting the traditional derrick and the base is only 2 ~ 4 pin connection, the innovative design for 8 pin connection, the derrick base stability is improved, reduce weight, reduce the workload of installation and lifting.Hydraulic wellhead, and equipped with reliable explosion-proof hoisting device.Table reserved for the installation of a full set of hydraulic equipment position.

(6) features of the electrical drive system

Direct torque control

The direct torque control, excellent torque response, good low-speed performance. By means of analysis method of space vector modulation direct torque control, calculation in stator coordinate and control the torque of AC motor, the best control of switch states of the inverter, in order to achieve high dynamic performance of torque.

The frequency conversion system with common DC bus

Using two sets of independent rectifier unit to the DC power supply, can bemutual backup. The model of variable frequency speed regulation system, than the size of single drive module greatly reduced.

The dynamic braking (Honghua company patent technology, patent number:ZL02 222560.9) using drill down the winch motor work in generating state, the formation of braking torque. Energy consumption braking alternativeelectromagnetic eddy current traditional brake, change