What is a motion compensation system?
Motion compensation system equipment includes a variety of products designed to compensate for the vertical movement of offshore drilling rigs due to heave.
Why do we have motion compensation on the rigs?
Designed to compensate for the vertical movement of offshore drilling rigs, motion compensation (MoCom) systems work to isolate the heaving motion of the vessel from the drill string, to apply a constant tension to prevent riser buckling, and to tension guidelines and pod lines.
What is a downhole heave compensator?
In drilling industry, a heave compensator enables drilling in offshore environments. Heave compensator attenuates movement transmitted from the vessel to the drill string and drill bit ensuring security and efficiency of the offshore drilling process.
How does heave compensation work?
Active heave compensation (AHC) is a technique used on lifting equipment to reduce the influence of waves upon offshore operations. AHC differs from Passive Heave Compensation by having a control system that actively tries to compensate for any movement at a specific point, using power to gain accuracy.
What is motion estimation and motion compensation?
Motion estimation examines the movement of objects in an image sequence to try to obtain vectors representing the estimated motion. Motion compensation uses the knowledge of object motion so obtained to achieve data compression.
What is motion compensation VR?
Motion compensation is a feature that helps smooth frame rates in VR applications for a more seamless visual experience.
How does passive heave compensation work?
A passive heave compensation device acts as a spring device with a predefined, relatively low stiffness. It allows relative motion while keeping load variations in wires, suspending the load within acceptable limits. Passive heave compensation systems normally require no power supply for their operation.
What is AHC crane?
Active heave compensated (AHC) cranes stand for trouble-free operation in the most extreme conditions. PALFINGER delivers AHC offshore cranes ranging from smaller models for SOV’s to larger models for subsea lifts, in addition to special systems for module handling deployments.
How do you calculate motion?
There are two mainstream techniques of motion estimation: pel-recursive algorithm (PRA) and block-matching algorithm (BMA). PRAs are iterative refining of motion estimation for individual pels by gradient methods. BMAs assume that all the pels within a block has the same motion activity.
How do I use OpenVR?
OpenVR
- Enable virtual reality support. Open the Player Settings (menu: Edit > Project Settings > Player), select Other Settings and check the Virtual Reality Supported checkbox.
- Use the Virtual Reality SDK list displayed below the checkbox to add OpenVR.
- Enter Play Mode in the Editor to test the build.
What is constant tension Crane?
The constant tension mode normally is used to control the tension in the wire rope when the load has landed. In CT mode, the system keeps tension in the wire rope at a preset value. The operator can select the transition mode from AHC to CT either manually or automatically.
What is a crane compensator?
Mounted between the hook and the load, Cranemaster Passive Heave Compensators expands your vessel capabilities and protects your crane, lifted object and personnel. The result is improved operational weather window, reduced probability of snap loads and reduced heave motion.
Is OpenVR the same as SteamVR?
openVR – Hardware independent layer providing APIs for peripheral access. That is it can provide access to either Oculus or Vive hardware via a defined interface. SteamVR – Provides access to hardware to games developed either in unity or unreal. Unity3D – A game engine to develop games.
What is OpenVR mode?
OpenVR is an API and runtime that allows access to VR hardware from multiple vendors without requiring that applications have specific knowledge of the hardware they are targeting.
What is auto tension winch?
– Automatic tension mooring winch, self-tension winch – Winches designed to heave-in automatically whenever the line tension falls below a certain pre-set value. Likewise, they pay out if the line tension exceeds a pre-set value.
What is s in motion?
S-in motion® is a set of steel solutions developed by ArcelorMittal for carmakers who wish to create lighter, safer and more environmentally friendly vehicles. It includes a range of steel solutions that can be used to make cars lighter at the most affordable cost.
What is a drill string compensator?
A drill string compensator decreases the influence of the heave of a drilling vessel on the drill bit. Drill string compensators are also known under the more general name: heave compensator. Drill string compensators are used onboard drill ships and semi-submersible drill rigs.
What is a direct line compensator?
The Direct Line Compensator system with an integral traveling block minimizes the effects of drilling vessel vertical motion (heave) on the fixed and rotating drill string and bit. The Shaffer™ Drill String Compensator is the most popular system of its kind in use today.
How does the motion compensation system work?
Our motion compensation systems compensate for the vertical movement of offshore drilling rigs by isolating motion from the drill string, preventing riser string buckling, and providing constant tension to guidelines and podlines Have a question? Contact us.
What is a crown mounted compensator?
The crown-mounted compensator offers passive heave compensation for the drill string, aiming to keep a constant load on the bit while drilling. The crown-mounted compensator is mounted on top of the derrick crown beams and is used on conventional derrick/drawwork vessels.