workover rig derrick manufacturer

Manufacturer of standard & mobile rigs & carriers for oilfield applications. Includes well servicing from 14,000 ft. to 22,000 ft., workovers from 10,000 ft. to 16,000 ft. & drilling from 6000 ft. to 10,000 ft. Specifications include brakes range from 28 in. dia. x 8 in. wide to 42 in. dia. x 12 in. wide, barrels from 12 3/4 in. x 38 in. to 18 in. x 43 in., chains from 1 1/4 in. to 1 3/4 in., clutches of 24 in. with single & 2 plate air friction outboards, shafts of 5 in. dia. to 6 1/2 in. dia. & gross weights from 63,200 lbs. to 115,000 lbs. Also includes forged steel, demountable options, mufflers with spark arrestors, dry type air cleaners, transmissions with torque converters, water splash brake cooling & up to 6 axles.

We provide workover rigs/completion rigs from well-known and respected manufacturers including Corsair, BW Hyduke, Cooper, Load Craft and Service King. Please see our inventory below:

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A Derrick hand handles the uppermost section of the working string as it is brought from or lowered into the wellbore. The Derrick hand is responsible for the safe and effective operation and working condition of the derrick, mud pumps, fluids, and related equipment. Takes directions from the Operator or Relief Operator.

Steel Fabrication, Machining, Welding, Coatings, Snubbing Units, Workover Rigs, Rotary Tables, Power Packs, Casing Jacks, Hydraulics, Pump Motor Skid, Oilfield Tools & Equipment

This galvanized workover rig is currently working at the Thums Island Oil production project, where a thousand plus directional wells have been drilled. These wells are in constant need for additional stimulation that is provided by this hot-dip galvanized workover derrick structure. The project adds to the safety of the workover/drilling rig crew through the reduction of derrick maintenance in a highly corrosive oil and gas drilling environment. This derrick structure is constantly exposed to the highly corrosive oil and gas drilling industry.

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Since 1951, Derrick’s pioneering innovations have demonstrated a commitment to the Mining & Industrial, Oil & Gas Drilling, and Civil Construction industries! Advanced, high-efficiency, high-capacity fine particle screening equipment and patented screen surface technology lead the way in meeting the ever-changing needs of these diverse industries. From the unique SuperStack® for the Mining & Industrial sector to 8 generations of shale shakers for Oil & Gas Drilling, Derrick’s rugged, reliable equipment proudly serves industries known for intensely challenging environments.

The experience at DSL in the design and manufacture of Offshore Drilling Derricks & Masts stands as one of the best in the Industry. Over 25 years of experience applicable to the design and manufacture of Dynamic & Static Derricks, Folding and Telescoping Masts of every size and capacity. All of this experience and expertise is at your disposal to design the solution for your Drilling Rig. Company names have changed over the years but we have retained this wealth of experience that is now once again flourishing at DSL.

When we are not working on new builds we retain our Engineering capacity on the vast range of upgrade, refurbishment & recertification projects we carry out on existing structures & rigs.

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Social media is cool. I’m able to keep up with people in the industry, all over the world. The different methods and equipment make for some interesting conversations. I got into a discussion the other night about derrick design, the different rigs and the reasons for the designs, so I thought I’d share a little of what I’ve learned over the years.

Derricks in the drilling industry basically come in two types: internally loaded and externally loaded. Examples of externally loaded derricks would include a standard Smeal rig or an oilfield workover rig. This means that the load is dispersed to the foundation by transmitting and dividing it on the block to the load on guy wires, or hydraulic cylinders. This design is very handy, as it allows you to rig up over most any hole and allows plenty of working room. Guy wires can be either to the ground or back to the rig itself. Most smaller rigs use guys to the front of the unit, and any ground wires are just for wind stability. Pulling power is often limited by the weight of the unit. I’m sure you have seen or heard about situations that lifted the front wheels off the ground. That’s pretty much the limit, and it’s hard on equipment. Downsides include flex and overall capacity. They will flex and move as loads are increased. These derricks can be built very strong, but the engineering challenges get larger on the big units.

Very common in all classes of the drilling industry are internally loaded derricks. Everyone is familiar with Mayhew, Gardner-Denver and Failing rigs, as well as many others. This includes the biggest oilfield rigs. The rotary, and the load, are inside the derrick. Forces are transmitted directly from the block to the foundation, without external guys or support. These derricks are typically vertical and are self-stabilizing, and don’t require any headache or ground wires. This makes for a very strong and compact unit, but sacrifices working room on smaller rigs.

A well-designed derrick will last a lifetime of daily use — and occasional abuse. Since they are over our heads, we should know, understand and maintain our derricks.

Older designs, such as cable tool rigs, are externally loaded, but have such a tried-and-true design that they’re able to handle most of the loads put on them. Eventually, rotary rigs came along and were internally loaded derricks. These are very strong derricks for their size, which is a good thing. On most water well rigs, the drawworks don’t have enough power to damage the derrick. Whether this is a design feature or an economic consideration, it sure is safer. I’ve seen drillers who would ignore the weight indicator (if they had one) and just “give ‘er hell.” With most water well rigs, they run out of clutches or horsepower before they have a train wreck. Oilfield rigs are different. They have the power to do anything the rig will take, and more. That’s why they have weight indicators and crews are trained to use them. When these derricks take a load, several things happen. They will almost always “squat” with a significant load. This can be anything from half an inch to several inches, depending on load, foundation and design. But they usually stay over the hole. In my years as a borehole fisherman, I have been on many stuck pipe jobs. This generally requires that I pull more weight than the rig sees on a day-to-day basis. Sometimes, the company has strict rules but, sometimes, it is up to the people on the rig as to what their iron will stand. It’s not uncommon to pull way over the rated capacity. When I have to do this, I always look very carefully at everything. As I said, when you load a conventional derrick, it will squat when it takes the load. It will also twist a little, but stay over the hole. However, as you increase the load, most derricks will twist a little more in proportion to the load. When the load is released, the derrick will spring back to its original size and shape. This is normal elasticity. At some point, though, as you increase the load, the derrick will not continue to flex or twist. This is the danger zone, and indicates that you have reached the limits of elasticity of the steel. Been there, done that. It’s not pretty. It’s then time to try a different approach.

Usually, a well-designed derrick will last a lifetime of daily use — and occasional abuse. Since they are over our heads, we should know, understand and maintain our derricks. If you crater a derrick — and live through it — you will have a lot of explaining to do.

Newer rigs are built either way, commonly with box tubing and an external load. These are great rigs and very popular. But, while they allow more working room, they do take more maintenance. I guess it’s what you grew up with and what you are used to.

The Workover Rig Derrick hand, performs and maintains service on oil wells as part of a 3-5 person crew of a workover rig. Works closely with various field personnel as a team. Maintains and implements all parts of a rig, demonstrating knowledge of all aspects and equipment on site.

Contango Oil & Gas Company is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, national origin, sex, gender identity, sexual orientation, age, genetic information, or pregnancy, status as a protected veteran, status as a qualified individual with a disability, or any other status protected by federal, state or local law.

Workover rigs, also called pulling unit rigs, are specialized oil rigs set up for inserting or pulling pipe tubing in and out of wells. Workover crews are called when an oil well has been drilled, is undergoing repair or is being retired, as indicated by Schlumberger.

These crews are relatively small compared to other rig crews and consist of tool pushers, operators or relief operators, derrick men and floormen or roughnecks. The average workover rig salary overall was ​$65,039​ as reported by Simply Hired in 2022. Available workover rig jobs and descriptions can be found on the Rigzone website.

The acting supervisor on a workover rig is called the tool pusher. The main task of a pusher is to hire, fire and supervise contracting work crews. When contractors have an issue on site, the first person they report concerns to is the tool pusher. Pushers need to have an intimate knowledge of how each and every part of a rig works, both individually and as an overall part of the drilling operation as a whole.

If equipment fails or needs to be reordered, the tool pusher talks with suppliers to get the right parts out on site with a minimum of downtime for the rig. The pusher is responsible for the overall safety of a rig. If the tool pusher has any safety concerns, he has the power to halt production until the concern is resolved.

The operator/relief operator is next in order of responsibility to the tool pusher on a workover rig. The main task of an operator is to control the crane and derrick that hauls pipe in and out of the bored well. In smaller crews, the operator is also the one who drives the rig truck. When laying pipe into a well, the operator directs the truck or derrick to the optimum spot next to the bore opening.

The operator then instructs the derrick hands and roughnecks where to place the bore pipe for easy access by the crane or by hand-loading methods. During a well breakdown or repair, the operator directs the crew hands in storage of extracted pipelines. Because the operators work most closely with derrick hands and roughnecks, they are typically responsible for selection and maintenance of their immediate workover rig crew.

In the pulling unit rig crew hierarchy, the derrick hands come after the operator/relief operators. The main responsibility of a derrick hand is everything that is above ground on the rig. During laying operations, derrick hands assist the operators/relief operators in inserting boring into the well. During repair or breakdown, they assist the operator in pulling pipe out of the well and storing it properly.

In between laying, derrick hands have other responsibilities as well, depending on the size of the crews. In smaller crews, Derrick hands also see to the maintenance of the rig-based electric and diesel generators necessary to power rig equipment.

At the bottom of the pulling unit rig crew in terms of seniority is the floorhand or roughneck. The main task of a roughneck is to perform any kind of tasks asked by either the derrick hand or the operator. These tasks can range from assisting with laying new pipe or removal of old tubing, general construction, to moving new equipment, such as generators. Most crew members on a work-about start their career as a floorhand or roughneck before working their way up to more senior positions.

We have a large fleet of workover and well service rigs and equipment with experienced crews and operators. We also have a large staff of experienced mechanics, rig mechanics, welders, and other service personnel and crews available for any oilfield related service needs.

Justiss Oil Company supplies both single and double derrick rigs as well as an assortment of equipment suited for well services. Please visit the links on the left to review our rigs, equipment, and rates lists.