workover rig diagram quotation

Download Workover & Drilling Rig Inspection Checklist As we mentioned in the Rig Audit Article, rig inspection is an important process that shall be done from time to time. Especially, after the rig moving to a new drilling location.

Founded in 1969, RG Petro-Machinery Group Co., Ltd. is the manufacturing base of Chinese major technical equipment and fast move petroleum drilling rigs. At present, it has 12 subsidiaries with 9 production and supporting branches. Its main products include 12 series of more than 200 varieties, such as truck-mounted drilling rigs, skid-mounted drilling rigs, trailer-mounted drilling rigs, workover rigs, oilwell logging equipment, and integrated automatic well service equipment.RG Group has established a complete scientific and technical research and development system. It has academician workstation, post-doctoral scientific research workstation, and the National Petroleum Truck-mounted Equipment Standardization Work Department. It is responsible for hosting in drafting the national petroleum and petrochemical industry truck-mounted equipment standards. It has a nationally recognized enterprise technology center and metrology inspection laboratory, and has strong machinery fabrication and system integration capabilities. The company has passed ISO9001 and API Q1 international quality system and been authorized to use API 4F, 7K, and 8C monograms since 1990s.RG provides the oil and gas drilling equipment and all-round services according to the demands of the customers globally, including drilling services, equipment maintenance services, engineering services, inspection services, and equipment leasing etc. RG Petro-Machinery Group Co., Ltd. makes the great efforts to provide the first class equipment and services for the oil and gas industry of China and the world.

We like to throw around “blog ideas” over here at Croft to help my fellow blog partner, Amy and I have a new fresh blog every week. We try to keep our readers up to date with both the new and the old.  Someone threw out the idea of writing about a workover rig. Still being new to the industry, I snatched this topic up because I simply wanted to learn more about it myself!  My main focus for this blog is simply discussing what is a workover rig and why it is important.

First off, maybe you know a workover rig by a different name. They can be called completion wells or pulling units. I just want to try to avoid any confusion! I am going to give Wikipedia’s definition first and then break it down to layman’s terms for those of you who don’t quite understand what the Wiki is trying to say (Like me). According to Wikipedia, “The term workover is used to refer to any kind of oil well intervention involving invasive techniques, such as wireline, coiled tubing or snubbing. More specifically though, it will refer to the expensive process of pulling and replacing a completion.” Let’s break down some of that Terminology…

Snubbing: This method is used in more demanding situations when wireline and coiled tubing does not offer the strength and durability needed. Snubbing runs the bottom hole assembly on a pipe string using a hydraulic workover rig.

So basically, the purpose of a workover rig is to replace a well with a fresh completion. This may have to happen due to the well deteriorating or the changing of reservoir conditions. This is performed if a well completion is unsuitable for the job at hand. An example of the well deteriorating is the equipment may have become damaged or corroded such as production tubing, safety valves, electrical pumps, etc. An example of the changing of reservoir conditions maybe if the flow of a well has decreased over time. If this happens, when the well was originally drilled, it was fit for tubing that was big enough for a higher flow of oil and gas. As the flow decreased, smaller tubing is now needed.

For a workover to take place, a well must be killed or in other words, stop the flow of oil or gas. This is an intense procedure for a workover to take place, so they are planned long in advance.

Well Service | Workover Rigs - 844/80 Double drum draw works. looks to be recently rebuilt. Has new Lebus Grooving on Tubing Drum. Comes w/ 250 HP 2 speed jackshaft/RA BOX. More Info

Well Service | Workover Rigs - CARDWELL KB200B Freestanding Oilfield Workover Rig / Service Rig / Pulling Unit, Service Rigs, Used Cardwell KB200B Freestanding Service Rig, 5 Axle Carrier, Detroit 8V71... More Info

Well Service | Workover Rigs - WELL SERVICE RIG - COOPER 350 Well Service Unit p/b DETROIT 8V-92 Diesel Eng, ALLISON 750 Trans, 42X12-38x8 DRAWWORKS w/dual disc assist, 97’ 200,000# Telescoping M... More Info

Well Service | Workover Rigs - CROWN 350 SERIES -- SERVICE KING 104" 205,000# DERRICK, CAT3406, ALLISON 5860,38X10 DOUBLE DRUM DRAWWORKS, CROWN SHEAVES REBUILT 2013 MAIN26”X4,SANDLINE 22”, NE... More Info

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Well Service | Workover Rigs - 2015 INTERNATIONAL PAYSTAR 5900 Flushby Unit. C/w 2003, Refurbished in 2015, Western Fab Ltd. flushby unit, s/n 03-09-1008, 50 Ft. Mast height, 50,000 lb. pull rating, fr... More Info

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The hoisting system on a drilling rig does the heavy lifting on the rig. It is used to raise, lower, and suspend the drill string and lift casing and tubing for installation into the well.

A schematic of the hoisting system is shown in Figure 9.03 for a kelly drive rig. In this figure, the derrick (or mast) provides the structural support for the hoist system. It must be capable of supporting the entire load on the system including the weight of the drill string (accounting for buoyancy effects) and any frictional forces.

The crown block and the traveling block form a Block and Tackle System on the rig. The drill line can be strung as pairs of 2 through 12 lines (six pairs). The greater the number of lines (and pulleys) in the block and tackle system, the greater its lifting power but at the expense of slower upward and downward movement of the system.

The drawworks of the hoisting system is a winch that reels the drilling line in or out causing the traveling block to move up or down. The drawworks is the component of the hoisting system that consumes energy from the power system. The drum on the drawworks is grooved to accommodate a specific size drilling line. Figure 9.04 shows a photo of an actual drawworks used on a drilling rig .

Not shown on the schematic or the photo is the braking system on the drawworks. Modern rigs use both a mechanical brake and an electromagnetic brake. The braking system is an integral part of the drilling process because it is used to control the Weight-on-Bit (WOB) during drilling. The two most important drilling parameters within the Driller‘s control to maximize the Rate of Penetration (ROP) are the weight-on-bit and the rotational speed of the rotary system in Revolutions per Minute (RPM).

The automatic operation equipment for minor workover is mainly composed of a wellhead operation device, hydraulic elevator, pipe and rod transmission and arrangement device and electro-hydraulic control system.

The device adopts the structural form of dispersing the functional modules and integrated installation on the workover rig: with the hydraulic tong, manipulator and anti splash snap device set on the derrick of the workover rig, which can expand and rotate, and the safety slip is installed above the BOP.

The device only needs to install safety slips, which realizes rapid installation and migration and shortens the auxiliary working time. The device has the function of moving back and forth, left and right, which is convenient to align the wellhead. The height of the hydraulic tong is adjustable and can adapt to the wellhead with different heights. Hoisting equipment and special transport vehicles are not required for the installation and removal of the device.

The main electric control box can be installed on the operation vehicle or integrated into the modular wellhead operation device. The make-up torque of various oil pipes is set on the touch screen to realize automatic make-up and break-down. Equipped with video monitoring, process prompt, safety alarm, etc. The control system has a perfect action interlocking function to ensure the safety and reliability of the workover operation process. All of the electric cabinets, sensors, connectors meet the requirement of Explosion-proof on field.

In order to solve low degree of work over automation, labor-intensive job dangerous, poor working environment issues, Shengji has developed a series of mechanical work over system, including workover automatic system, minor workover automatic system and snubbing operation equipment.

Oil well workover is a high-tech, high-risk work. The conventional oilfield workover rig has problems such complicated operating procedures and high labor intensity. Shengji, in cooperation with the Shengli Drilling Corporation, have designed an oilfield workover rig automation system.

The oilfield automatic workover rig has a high degree of automation adopting modular integration and advanced robot closed-loop control technology. It functions as self-diagnosis, leakage and short circuit protection and fault alarming, etc. It has remote monitoring capability.

The automatic workover rig greatly increases the automation of workover operations, reduces the number of operators, decreases workers’ labor intensity. The technology is advanced, safe and reliable.

The 844 TD-HD Workover Rig by Franks has a 3/4″ Tubing Line, Air Clutches and is powered by a Detroit Diesel 6V71 Motor & Allison CLT 4460 transmission.  The 844 TD-HD Workover Rig is in excellent working condition, has a current OK Tag and clean Title.

Performance proven main drum draw works assemblies are modular construction for versatile rig assembly. Designed to allow maximum parts interchangeability and easy add-on features to customize this for your specific operation.

The design of drilling rigs for the petroleum industry has remained basically unchanged for the last four decades. Today"s offshore rigs have evolved from the basic land rig concept towed offshore in the 1950"s. Factors such as deeper waters and harsher environments have increased demands for additional auxiliary equipment such as active crown mounted motion compensator, topdrive and comprehensive mechanised pipehandling equipment. Implementation additional equipment and new systems have followed an "add-on" philosophy which has resulted in concepts of monstrosity. Further development to meet today"s and future demands of versatility, such as integration of capabilities for snubbing and coiled tubing operations, will probably evolve to a stage where the "multi-functional" course could turn to the "multi-useless" curse.

A thorough review of the status, combined with the desire to be able to contribute with more optimal solutions, have lead Maritime Hydraulics to the development of the RamRig concept.

Main Objectives. Maritime Hydraulics launched the idea in 1987, whereafter a joint venture engineering study with British Petroleum Development Norway Ltd. was carried out in 1988 and 1989. The study evaluated all known rig concepts with emphasise on the aspects of hoisting and tubular handling efficiency. The main objectives of the development work were:Improve safety by reduced manning and improving working environments,

The study concluded the RamRig concept to be the most optimal of the alternatives considered. However, as it was found to be too bold and radical for its time, it was decided that the project was to be shelved. This was mainly due to the lack of field experience of important components like the control system and the large hydrostatic transmission required.

After about 5 years Saga Petroleum"s efficient exploration, "EfEx", study, re-vitalised the concept in 1994. The detailed design of a complete drilling rig for an application for deepwater exploration operations was completed by June 1995. In this study the RamRig was found to be an important enabler for developing more efficient total concepts.

Many oil wells in Brazilian onshore fields rely on artificial lift methods. Maintenance services such as cleaning, reinstatement, stimulation and others are essential to these wells. These services are performed by workover rigs, which are avaliable on a limited number with respect to the number of wells demanding service. The decision of which workover rig should be sent to perform some maintenance service is based on factors such as the well production, the current location of the workover rig in relation to the demanding well, and the type of service to be performed. The problem of scheduling workover rigs consists in finding the best schedule for the available workover rigs, so as to minimize the production loss associated with the wells awaiting for service. We propose a VNS heuristic for this problem. Computational results on synthetical and real-life problems are reported and compared with those obtained by other approaches. This project was sponsored by the Brazilian agency FINEP (Financiadora de Estudos e Projetos), in the framework of the CTPETRO Brazilian national plan of science and technology for oil and natural gas.