No one likes unplanned downtime, especially when it was preventable. Damages resulting from unscheduled equipment issues can cost you time, money and can negatively impact your customer relationships. Consistently achieving top tier equipment reliability requires a solid plan and disciplined execution.
Volant Casing Running Tools (CRTs) are designed and built to last, but as robust and durable as they are, critical load bearing components will eventually wear down. This doesn’t mean your CRT needs to be replaced. An inspection and refurbishment by Volant will return your CRT to “like new” condition, saving you time and money and allowing you to deploy your CRT with confidence that it will perform as desired.
The best way to ensure your Volant CRTs will perform as expected is to have them properly serviced in accordance to the recommended intervals specifed in the Volant Product Manual, consistent with API RP 8B – Inspection and Remanufacture of Hoisting Equipment
Casing Running Tool Internal (CRTi)
Internal grip (CRTi) equipment is inherently compact and remarkably efficient. The available space inside the casing defines capacity, and for smaller sizes this can be limiting. When you need to run deep, heavy, small diameter casing strings, think CRTe.
Casing Running Tool External (CRTe)
Thinking Bigger, For Smaller Pipe.
The CRTe brings the advantages of our compact robust internal grip equipment to applications that require larger hoisting loads and torsional capacity than is currently available with our CRT i equipment. The initial product release will enable top drive-equipped rigs to engage 4 ?” to 5 ?” casing to apply hoisting loads up to 500 tons, torsion up to 40,000 ft-lbs, and compression up to 100 tons. The CRTe’s modular architecture is scalable, allowing future hoist, torsion, and diameter capacity requirements to be driven by market demand.
The CRTe is a fully mechanical tool, relying upon the same gripping technology used in Volant’s well-proven internal grip CRTi family of casing running tools. In less than four years since product launch, our internal grip tools have run more than 100 million feet of casing at locations around the world. The main difference between the CRTi and CRTe tools is that gripping force enabling hoisting, pull-down and torsion is applied externally rather than to the internal surface of the casing. Tool function, as experienced by the driller, remains identical – set down and turn clockwise to engage; set down and turn counter clockwise to disengage.
Volant’s efficient design philosophy has delivered another compact, lightweight tool. With substantial load capacity, length as short as 71 inches (180 cm), and weight as low as 1700 lbs (770 kg), the CRTe is positioned to become the industry standard for handling heavy strings in deep wells, even if rotation and circulation are not required. Compact size and modest weigh delivers exceptional mobilization efficiency.
The CRTe’s modular design maximizes tool utility for a wide range of applications. The ‘Drive Head’ module connects the top drive quill to the ‘Gripping Module’, activates gripping mechanism, and transfers hoist and torsion loads. The Gripping Module transfers load to the outside of the pipe and is configurable to grip a range of casing sizes limited only to a module-specific maximum. Options are available to accommodate a range of application requirements. The Drive Head can be ordered with 6 inches of axial ‘float’ to reduce the chance of casing thread damage during stabbing and make-up, or without float to minimize overall tool length. The Gripping Module can be specified with a maximum diameter to suit either 5?” or 7 ?” casing and both can be fitted with dies and seal elements to accommodate casing sizes down to 4 ?”.
CRTe Design Capacities:
- Hoisting 500 tons (or more)
- Torque 40,000 ft-lb
- Compression 100 tons
- Approx. Weight 1,800 lbs – 2,500 lbs (depends on option setup and casing size)
- Approx. Length 71 in – 90 in (depends on option setup)
Bottom Line Performance.
Getting safely to the bottom is the bottom line. If you can avoid stuck pipe, you can avoid extra costs and risks. Volant’s Casing Running Tool allows you to reciprocate, rotate and circulate casing and liner strings, reducing non productive time and associated costs. It’s proven where the figures add up – in the real world of field operations.
Problem. Solution.
Problem
Where: The Rig
What: Manpower requirements have historically driven costs up. The traditional approach to making up pipe, computer monitoring, flling, circulating and cementing results in multiple workers and multiple pieces of equipment, operated by several different service providers whose presence can increase the risk of rig ?oor accidents.
Solution
Most of these functions can be combined into a single service and a single piece of equipment that utilizes manpower already at the rig. The Volant CRT is the only casing running tool that is operated by the driller, bringing efficiency and enhanced safety to the process.
Problem
Where: Wellbore
What: Frictional resistance within the wellbore prevents further advance of the pipe.
Solution
Rotation can be used to reorient the friction vector (a force with magnitude and direction) to oppose the direction of rotation. This reduces the component of friction opposing advance into the wellbore and that’s why you can get a pipe pushed out further if you rotate it. Any CRT can provide this, but only the Volant CRT is also designed with a substantial push capacity. The Volant CRT is designed with a substantial push capacity to overcome these issues.
Problem
Where: Casing Surface
What: CRT dies can mark the casing surface. This can range from mild indentations to severe gouges resulting from slippage. Other CRTs depend on hydraulic set to engage the dies suffciently to transfer torsion loads. If torsion exceeds this predetermined capacity, slippage and surface damage occur.
Solution
Volant CRTs self-energize in torsion as well as in hoisting and therefore grip only as hard as they need to. And they don’t slip
3 CRT Maintenance and Refurbishment
Volant Inspection, Maintenance and Refurbishment Service Offerings:
Case Study
Casing Running Tool CRTi
The Challenge
Casing while Drilling (CwD) 9-5/8” surface casing on four oil wells ranging from 1300’ to 1800’ measured depth. The major challenges included:
- High drilling costs.
- Need to increase drilling efficiency.
- Need to improve drilling performance.
- Removing any stuck pipe risks.
- Minimizing fluid losses.
- Maximizing rig and rig crew capabilities for “off-site” works completed where normal drilling operation would not allow.
- Reduction of flat spots in the drilling curve.
- Improvements for future drilling programs.
The Solution
Drill Quip Pty Ltd determined the best method to meet these challenges was to conduct a Level II CwD using the Volant Casing Running Tool (CRTi) and centralizers during the process. The CwD con guration was designed based on the customer’s formation data and expected drilling parameters. Drill Quip chose the Volant CRTi3-7.0 tool over other (hydraulic) casing running tools to drill all four wells due to its robust and compact design, high torque capacity, and simplified mechanical operation. Volant HydroFORM Centralizers were selected for centralization based on their high durability and proven track record in casing drilling applications, offering dependable standoff that would enable a reliable cement job. Volant’s MLT Rings were installed in order to accommodate the increased torsion expected through the casing string and to reduce the risk of damaging the API coupled connections during drilling. The casing drilling bits and floats were supplied from the customer’s inventory.
The Results
All four wells successfully reached TD using the CRTi3-7.0 and a combination of HydroFORMTM Centralizers and MLT RingsTM. The following results were experienced by Drill Quip:
- The Volant CRTiTM provided operational ef ciencies in Drilling while Casing while also reducing any stuck pipe issues that may have been encountered on all four wells.
- At Total Depth the hole inclination on all wells was below 0.5°. The equivalent inclination when drilling conventionally is between 1.0° – 2.0°.
- After inspecting the Volant dies on the CRT at completion of all wells, minimal wear was observed.
- Volant HydroFORM Centralizers increased efficiencies by reducing drag and friction, particularly in the dog leg of the wellbore.
- Volant MLT Rings ensured proper torque values were achieved for all joints and assisted where rotation and reciprocation was required.
- Total Footage Drilled over 4 wells = 5,883’.
- Total Drilling hours over 4 wells = 94 hrs.
- Average Rate of Penetration (ROP) over 4 wells = 63’ p/hr.
- Overall saving was approximately $1 Million (USD) for all four wells compared to conventional drilling and completion methods.
石油圈
