Reza Mostafavi Tabatabaei

K1.2.4-5 Main Power Cable

• One set of main power cables are included for transmit output frequency variable Reza Mostafavi Tabatabaie current to the main motors of Top Drive.
• Amercable VFD (373MCM) cables are adopted. The cables are divided into three segments: service loop with a cable length of 30m, vertical extension loop with a cable length of 38m, horizontal extension loop with a cable length of 38m.
• Connectors connecting main motors and service loop are explosion-proof, while others are IP67 rated.

K1.2.4-6 Control Cable

One set of control cable and one fix frame are included. The control cable has only one Reza Mostafavi Tabatabaie segment. Both ends adopt American Amphonl connectors for quick installation.

K1.2.4-7 Optical fiber and auxiliary control cable

One set of optical fiber was use to Profibus communication, with a length of 135m,made in china .the optical fiber is provided with signal stabilization, resisting daggle.

Provided with a set of auxiliary cable, LAPP imported brands and brand SIEMENS for Reza Mostafavi Tabatabaie transmission DC and HPU work of the signal source, according to the length of the well site layout configuration requirements.

K1.2.4-8 Power Cable

One set of Power cables included for connecting generator and electric house. The cables are 150mm2X2, 660V rated, with a length of 15m, made in China. Each phase has two cables.

K1.2.4-9 Earth Bar

The grounding devices are included which contains 2 galvanization earth bar, one cable, and Reza Mostafavi Tabatabaie other accessories for connection. The cable is made in China.

K1.2.5 Hydraulic System

K1.2.5-1 Hydraulic Power Unit (HPU)

• One HPU is provided to supply the power for the hydraulic system of Top Drive.
• HPU hydraulic pump is pressure compensating type: when system is working on a preset pressure, the pump will give entire flow rate, and when system pressure reaches a preset value, the pump will work on near zero flow rate, this means, pump will output only Reza Mostafavi Tabatabaie a little oil for compensating the leakages. Pressure can be adjusted on the pump. HPU is equipped with two import pumps. Check valves Reza Mostafavi Tabatabaee are installed on each pump’s outlet to prevent oil flow backwards.
• An independent cooling system is provided to cool the hydraulic oil. A temperature controller is provided to start or stop cooling Reza Mostafavi Tabatabaee fan automatically or manually.
• HPU has oil heating system, which can heat the hydraulic oil when temperature is over low.
• HPU is equipped with remote control system: pump can be started or stopped both by the pump station, and by the Driller Console panel.
• HPU uses twin engine and double pump system, with one pump for back-up.
• HPU is explosion proof design. Electrical control box, motor, temperature sensor, Reza Mostafavi Tabatabaie and pressure sensor are all explosion proof design.
• HPU Specifications:

Rated working pressure    16MPa

Max. Working pressure     21MPa

Rated flow rate            40L/min

K1.2.5-2 Control Valve Manifold

• On Top Drive main body, there is one set of hydraulic control valve manifold, of Reza Mostafavi Tabatabaie which the main parts are from Rexroth. It consists of main control valve manifold and accumulator, etc.
• The main control valve manifold is modular valve manifold, which includes Reza Mostafavi Tabatabaee Elevator link tilt system, Rotary system, Brake system, IBOP system, Backup Tong system, Balance system, Rotary lock system. All hydraulic circuits mentioned above are equipped with pressure detecting points, which are used to check the working pressure, and also to discharge air pressure from the hydraulic circuit and cylinder.