ross hill scr mud pump drive brands

ENSCO 71 is a Jack-Up drilling rig which was originally constructed at the Hitachi Zosen shipyard in 1982.  The original GE motor controls comprised five 1163 KVA generators and four 1800 ADC SCR units with associated auxiliary transformer feeders and jacking units. The SCRs were assignable to two 1600 HP twin-motor Mud Pumps, a twin motor 2000 HP Drawworks and a 1000 HP Rotary Table. A separate feeder drives a 1110 HP Top Drive. A fifth SCR was added by Hill Graham Controls in 1985 to power a third 1600 HP Mud Pump, which was cabled to the main busbars.

In early 2012, a decision was made to add a fifth 2500 KVA generator and an additional auxiliary transformer, to close-couple these to the main switchboard via a bus tie circuit breaker, and to include a dedicated feeder for the fifth SCR. A sixth SCR was also included in the switchboard extension to provide an alternative drive source for the third Mud Pump, effectively removing this load from the main switchboard. The switchboard extension, including full integration with the existing GE and Hill Graham equipment, was engineered and built by Zeefax.

The Zeefax Total Rig Auditavoids downtime and ensures rig systems remain operational and reliable. Many Drilling Companies will invest in a completeRig Auditin the knowledge that it offers a comprehensive overview of the state of their rig, which can also be submitted for compliance and due diligence purposes.SCR Training Simulator

Every Drilling Rig must have a Power Control Room – sometimes also known as an SCR (standing for Silicon Controlled Rectifier) System – which forms the functional heart of the power control of the drilling operations. Typically, SCR systems comprise a large steel room, inside of which will be a range of Motor Control Centres, Engine & Generator Controls, SCR Control cubicles, and other instruments and systems used for drilling purposes.

SCR Systems usually operate at 600V, and clearly, these systems can be extremely dangerous if not operated correctly and carefully by suitably trained operators. It is therefore vital that drilling engineers and operators are well trained using a combination of class room tuition and on-the-job training.

In response to this need, Zeefax have created the world’s first full size SCR Training Simulator, which accurately mimics the a real SCR; it looks and feels like the real thing, providing a realistic experience of live field operations – but without the dangerous high voltage. This system was created specifically for Naftogaz – for more details, click here.

A key feature of the simulator is the addition of the on-board computer system, which mimics all of the signals that would normally come into this SCR system from the live engines and generators, including the motors running the mud pumps, the rotary table or the Drawworks, etc. and can also simulate a wide range of known faults, allowing trainees to experience first hand problem solving in the safety of the simulator, before they experience the live system.GE Legacy Drive Systems

Used the same type SCR bridge as the Generation III, but rated at only 1200-1500 amp since the heat sink assembly is of a slightly different design. This system uses the GE generator GEM modules controls.

1980’s, 900amp. SCR bridges using the GE GEM Generator Control. As the bridges are small it requires two SCR bays to run a two-motor Mud Pump or Drawworks.

If you are interested in applying for this position, then please send us your latest CV and a covering letter toTest and Calibration Engineer – SCR products

Zeefax is the value source for parts and services for your legacy GE Drive and Generator Control Systems. We hold an inventory of critical spare parts and can provide comprehensive service solutions including Repair and Return of Modules and PCBs.

Zeefax operates a comprehensive repair and return service for all legacy GE Drive and Generator Control Systems. which includes cleaning, testing, repairing or replacement of defective components and a full system load test. This service includes a 6-month limited warranty.

Zeefax understands that replacement of a complete SCR Control System is often not viable due to the large cost and loss of production due to system downtime. At Zeefax we can offer a comprehensive service to support your legacy GE Drives and give it a renewed lease of life. That not only includes supply of spare parts and a repair/calibration service; qualified service engineers with years of experience with these Drives are available for regular Health Checks, fault-finding and general support purposes.Careers

In response to many customer requests, we have designed our own version of the legacy Ross Hill Controls AutoSync AC generator control module; the new module has been completely re-designed and incorporates all new digital circuitry as well as optional expansion capability to future proof the module.

Advancements in technology mean that many of the power semiconductors which were built into SCR systems 30 or more years ago have been superseded by new devices, often with improved specifications.

Our engineers are able to ensure that, when the original component is not available, a suitable replacement can be found. If the replacement is not an exact fit, we can engineer an adaptation to ensure continued serviceability of legacy equipment.Hill Graham Controls (HGC)

Following our acquisition of Hill Graham Controls (HGC), Zeefaxis in a unique position to offer total support for all legacy Hill Graham and Ross Hill Controls (RHC) systems both in the UK and throughout the world.

Zeefax’s unique experience and expertise has allowed the company to design, manufacture, supply, repair and calibrate many of the control modules used within older Hill Graham installations, as well as other manufacturer’s systems, including Ross Hill Controls (RHC) type systems.

In recent times,Zeefax has developed and brought to market a new digital AutoSync module, with an improved contemporary design and operation. This advanced module occupies the exact same footprint and has pin-for-pin connection compatibility with the now obsolete Ross Hill module, thereby providing a simple and cost effective upgrade path for existing users of the AutoSync module.

As part of our maintenance and service offerings for SCR systems, Zeefax is able to mobilise support and engineers to provide technical assistance during emergency shutdowns and downtime periods.

Given our years of experience and unique position to offer total support for all legacy Hill Graham Controls (HGC), and other manufacturer’s systems including Ross Hill Controls (RHC), IPS, and GE Micro Drill SCR systems, Zeefax can provide a full range of technical services for installation, commissioning, and ongoing operational support.SCR System Health Checks

The time to find out if your system is reliable is when operations are quiet – not during critical well operations – so the Zeefax SCR System Health Check is designed to identify potential weaknesses and either repair or replace immediately, or mitigate against these until a repair or replacement can be effected – usually at a quite time.

For reliable operation, the contact between the SCR devices and the heatsinks must be as good as possible but over time, and especially in offshore installations, corrosion may attack the interface between the SCR device plating and the aluminium heatsink. If corrosion is present it takes an expert to decide if refurbishment is required because as long as the damage is minimal and the two elements remain undisturbed, the mutual corrosion may still maintain a good contact.

Since our acquisition of Hill Graham Controls (HGC), our module repair facility and engineers, have been able to test and calibrate modules sent to us for repair within a quick turnaround period. In an important development, Zeefax has designed and built a new AC and DC Module simulator, to provide an improved testing platform for Hill Graham and Ross Hill type AC and DC modules. In particular, the AC module simulator is much improved over the older unit, and provides a greatly enhanced engine control and start-up simulation.

In addition, we are able to repair and re-calibrate most Hill Graham and Ross Hill type printed circuit boards (PCBs), including Power Limit, Field Supply Regulator, Sprocket Slip, Drillers Console, DC Auxiliary, SCR Auxiliary and Generator Exciter PCBs. Furthermore if following evaluation, repair is not possible, in many cases we can supply new manufactured boards using the original designs, but enhanced by us using modern components and manufacturing techniques. In this way, we can help to ensure that legacy systems remain operational and continue to provide reliable and trouble free service beyond their expected life.Motors & Generators

Even given the relatively controlled working environment of typical SCR pods, the conditions can often cause deterioration to both electrical and mechanical performance, requiring removal of the unit from the system, followed by refurbishment and renovation.

The heat sinks are inspected and if required, will be re-machined to ensure excellent electrical contact is maintained. Importantly, the SCR Thyristor ‘puck’ is replaced, and very special attention is given to the clamping torque and orientation.

If you would like to know more about the range of available Driller’s Foot Throttles, please call or email us, and we will be pleased to assist.SCR Blower Assemblies

An important part of every system is the forced air cooling, which is vital to ensure continuity and reliability of operation of the SCR stacks. It is essential that the heat generated during operation is reliably carried away, and Zeefax now produce a series of SCR Blower Assemblies which are compatible with the those used in legacy Hill Graham and Ross Hill type systems.

The Zeefax SCR Blowers are designed to operate with voltages up to 600 V @ 50 or 60 Hz; the operating voltage needs to be specified at the time of purchase (see the details and specification form below) and the blower may be configured with either Single or Duplex impellers and with or without base frames.

In order to aid potential users with the selection of replacement blowers, we have created a simple form which can be used to provide the few technical details we require. In this way, we can ensure that any SCR Blower supplied by us is fully compatible with existing assemblies, and will then install directly into the available location with minimal re-work required. You can download this form from this site; please fill it in and return it to us to receive a quotation.

Through our in-house R&D, we are developing improved specification products as replacements for legacy Hill Graham Controls or Ross Hill Controls boards; we can provide original replacements for many of the PCBs used on these systems, and by using modern techniques and components, we can even improve on some of the design features of the original products to enhance reliability and functionality.

0002-0390-12 1K 25W Dual potentiometer assembly ROSSHILL for mud pump0002-0390-12 1K 25W Dual potentiometer assembly ROSSHILL for mud pump0002-0390-12 1K 25W Dual potentiometer assembly ROSSHILL for mud pump

Our goal is to provide quality services to the drilling and completions industry. We offer premier AC and DC rig construction as well as service and support and our technicians are trained on Ross Hill, IPS (Integrated Power System), tech power SCR, and the increasingly prominent ABB Variable Frequency Drives. We give our clients the one on one attention that they deserve our team of young professionals strive for excellence in every area both on and off the job. There are no jobs to big or to small.

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IDM is a full service manufacturer of new land drilling systems and remanufactured land rig packages. The company’s extensive capabilities include rigs, drilling equipment, electric power systems, SCR or AC variable speed systems, and advanced instrumentation.

The National Oilwell Varco (NOV) Ross Hill RHC-1400 is their most popular SCR drive system. Several thousand RHC-1400 SCR bridges are powering drilling equipment around the world. These bridges are on large and small land rigs and numerous drilling platforms. SCR systems usually consist of three, four or five of these bridges depending on the size of the rig.

We have an ever changing supply of Ross Hill SCR components, though typically we have a fullSCR of both AC and DC control modules, usually in all flavors. You can buy one outright, exchange a bad component for a good one, or just send us your bad component for repair.

The electricity and control system by ZPEC can be used for 3000 to 9000 meters rigs, rig123.net’ target=’_blank’>VFD andSCR systems for client option.

The SCR drive system can be used for controlling SCR element, rectifying the constant voltage and frequency AC power into continuous adjustable SCR power, which makes it possible to control the drawworks of drilling rig, mud pump, rotary table, or the speed and torque of top drive, and it can realize stepless speed regulation, and meets the drive requirement.

Buyers are required to examine all items prior to removing them from the location. If the item differs significantly from how it was represented in the lot description, the Buyer must contact Customer Care prior to removing.