Ace Ratchet Collar Series
We deliver all sizes in standard and slim designs, along with custom designs for specific needs.
High axial load force
None loose parts
Marks on pipe to a minimum
Suitable for liner/casing drilling
Field proven
Designed for highly deviated or horizontal well sections
Machined in high quality steel
Cost effective
Slim design for close tolerance applications by providing optimal flowby
Rapid installation time
Ensures centralizers and other tubular attachments stays in its designated nest to provide proper standoff
Can be used with any grade of base pipe
Installation at any location
Ace Ratchet Collar Meets Deepwater Challenges in US Gulf of Mexico
Major GoM Operator selects Ace Ratchet Collar (ARC) and bow spring centralizer as a viable alternative to costly centralizer subs in deep water
The Challenge
A 13-3/8” liner needed to be run and set inside 16” casing above a 14-1/2” x 17-1/2” under reamed hole. The 13-3/8” string utilized flush joint connections and was run through the subsea wellhead in 8,000ft of water. The operator had to select a tool they were confident had extreme holding capability under all operating conditions to prevent casing accessories from coming loose, possibly sticking the liner or causing junk in the hole.
The Solution
A stop collar with a slim design was needed to pass through the 14-3/4” drift of the 16” casing and to provide sufficient holding force under all operating conditions. This is especially critical when passing through the wellhead restriction at the mudline where centralizer insertion force creates the highest load on the centralizer.
The patented slim ARC is specifically designed for close-tolerance applications to both pass tight restrictions and effectively manage surge and swab, allowing faster running speeds even in formations with narrow mud margins. Each unit is easily installed off-line and doesn’t require pipe preparation or transportation off-site for installation.
Through a major service company, Ace Oil Tools provided the Ace Ratchet Collar (ARC) as the fit-for-purpose solution to arrest centralizer movement during the installation. The ARCs are rated to over 90,000lbs to resist high axial load while meeting pass-through requirements of the 16” casing string at a substantial cost savings versus alternative solutions.
The Result
Thirty (30) ARCs and the centralizers were installed off-line by trained personnel at the pipe yard. The pipe was sent to the rig then run down hole through the subsea wellhead located in over 8000ft of water to total depth of over 12,500’ at 70° inclination. The casing annulus was circulated clean and cement pumped as per plan.
This run is another example of a successful installation and that considerable changes in temperature do not affect the holding capabilities of the Ace Ratchet Collar.
Highlights
• 13-3/8” Q-125 liner run thru 16” 97# casing (14.750” drift)
• 8000’ water depth
• ARC capabilities unaffected by 40°F mud line temp
• Liner run thru 3.0°/100’ DLS and set in 17-1/2” open hole at > 70° inclination
• Liner successfully ran to total depth and cemented
Ace Drilling Centralizer
Ace Drilling Centralizer Rotates on Liner, Provides Stability to Liner Drilling Directional BHA.
Casing and liner drilling are recognized as two of the best methods to minimize drilling problems and secure total depth of troublesome intervals. Both methods involve drilling with the casing or liner string with either a drill bit attached to the string or a retrievable BHA, which upon reaching total depth can be safely withdrawn through the string to isolate the BHA from hazards.
Based on the most recent successes of the Ace Ratchet Collar (ARC), ACE has developed the Ace Drilling Centralizer (ADC), a centralizer that rotates independently of the casing or liner string.This centralizer is developed for use in applications where many revolutions of the casing or liner string is expected. Its use reduces drilling torque and minimizes wear to both the parent casing and the rotating casing or liner. Applications include casing and liner drilling & reaming, and for rotating the string while cementing. To minimize drilling torque and wear on the liner and parent casing, the operator elected to run Ace Drilling Centralizers during its drilling test to evaluate their performance.
The 7” ADC solid-body centralizer consists of a centralizer coupled with (2) Ace Ratchet Collars with extensions that fit under the centralizer. The centralizer rides on these extensions to prevent wear on the casing or liner. The robust design is rated to 90,000lbs axial force and contains no small parts that can fail, leading to major issues.
The ADCs can be ordered with an outer diameter to match the hole size drilled. In this case 8-1/4” was selected to run inside an 8-1/2” open hole. The design of the curvature of the blades and the bypass slots can also be varied to meet specific requirements.
Ace Drilling Centralizer Rotates on Liner, Provides Stability to Liner Drilling Directional BHA
National Oil Company Selects Ace Drilling Centralizer (ADC) to Stabilize 7” Liner Drilling String in Directional Interval Casing and liner drilling are recognized as two of the best methods to minimize drilling problems and secure total depth of troublesome intervals. Both methods involve drilling with the casing or liner string with either a drill bit attached to the string or a retrievable BHA, which upon reaching total depth can be safely withdrawn through the string to isolate the BHA from hazards.
Based on the most recent successes of the Ace Ratchet Collar (ARC), Ace have developed the Ace Drilling Centralizer (ADC), a centralizer that rotates independently of the casing or liner string.
This centralizer is developed for use in applications where many revolutions of the casing or liner string is expected. Its use reduces drilling torque and minimizes wear to both the parent casing and the rotating casing or liner. Applications include casing and liner drilling & reaming, and for rotating the string while cementing.
To minimize drilling torque and wear on the liner and parent casing, the operator elected to run Ace Drilling Centralizers during its drilling test to evaluate their performance.
The 7” ADC solid-body centralizer consists of a centralizer coupled with (2) Ace Ratchet Collars with extensions that fit under the centralizer. The centralizer rides on these extensions to prevent wear on the casing or liner.
The robust design is rated to 90,000lbs axial force and contains no small parts that can fail, leading to major issues.
The ADCs can be ordered with an outer diameter to match the hole size drilled. In this case 8-1/4” was selected to run inside an 8-1/2” open hole. The design of the curvature of the blades and the bypass slots can also be varied to meet specific requirements.
The Result
The ADCs were installed onto the liner at the rig site by 1 trained installer, taking less than 10 minutes to install each centralizer assembly onto the pipe in the required location. Just under 900’ of directional hole was drilled with the liner in 13-1/2 drilling hours. The liner was rotated approximately 54,000 times at speeds ranging from 30 to 80 RPM, and was pulled at theend of the planned interval to recover all tools for evaluation.
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