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What is tender assisted drilling rig?
TADs were the rig of choice in the 1950s and early 1960s in the GOM for development drilling off fixed platforms. However, the monohull tenders tended to lose location with mooring failures during storms. This occurrence, along with severe motions of the tender, resulted in their losing favor, except for use in very mild or benign environments, such as in the Far East and West Africa. There are about 25 TADs in existence today, with most being monohull tenders. Four are semi tenders and offer the motion characteristics to drill in mild to somewhat severe environments. The TAD advantage is that its DES is relatively lightweight, one-quarter to one-fifth the weight and one-third the space of a standard platform rig. Most TADs carry the DES on the tender hull and are self-erecting, so no workboat or derrick barge is required. They are particularly attractive for situations in which there is an old platform with reduced load-carry ability and/or space, such as when a platform was drilled with a standard platform rig and then production equipment was loaded onto the platform, thus eliminating space and load-carry capacity. It is not unusual for a platform to deteriorate with age and then be unable to hold up a standard platform rig when additional wells need to be drilled. The TAD is an option for this situation. Of course, if the platform is in jackup water depth range, the jackup may also do the drilling if its cantilever can reach the well centers with adequate load capacity and if there are no incompatible spud can holes and/or a severe punch-through condition. For spars and TLPs in deep water where weight and space are at an absolute premium, TADs, particularly semi TADs with their lightweight DES, have significant advantages in some cases over a modular platform rig. This is usually true for spars and TLPs with > 9 or 10 wells up to a maximum of ≈ 24 wells. For spars and TLPs with < 9 or 10 wells, their load and space availability are too small for any type of platform rig or DES, and those with > 24 wells are large enough to support a modular platform rig without a large weight and space penalty assuming all other factors are equal. Semi TADs also have the advantage of acting as construction barges for platforms that are commissioning production equipment. Their large rig-up crane, open decks where the DES is stored and transported, accommodations, and general facilities offer a relatively inexpensive construction platform compared with a construction derrick barge. Why would anyone want to use a TAD? They may be particularly attractive for standard platforms in water depths over jackup-rig rating and where space and/or load limits are a major factor, for deepwater spars and TLPs with the right number of wells, and for any platform where weight and space for long ERW are limited. Generally, a TAD costs more than a platform rig, especially the modular type, but they are a very attractive option for certain situations. http://petrowiki.org/PEH%3AOffshore_Drilling_Units#Tender_Assist_Drilling
How do you make a simple machine windmill?
1.1Take the propeller off the flower. The flower's propeller will be used to spin the axle. A propeller from a larger pinwheel flower is best.2Place the spools between the plastic sheets and glue them on. These small spools should go at the corner of the plastic. Use super glue to attach the spools, and let it dry. This will serve as the casing for the windmill generator.3Measure the metal rod and drill holes in the plastic. The metal rod will go through the hole. Make sure the holes are perfectly aligned on both sides. Place the rod through the holes in the plastic.4Place the magnets in the casing. They should have enough space to rotate freely around the axle that will spin the magnets. Attach the magnets together using spacers. If there is not enough space between the spacers to insert the axle, the magnets are useless to generate electric current.5Put the rod in the hole. Wrap the wire around the generator. Wrap the wire around the casing 225 to 300 times.6Attach the propeller to the axle. The propeller from the wind decoration should be large enough to catch the wind. Place the propeller on a metal rod, and apply superglue.7Remove insulation from the wires. Attach the leads to the end of the low voltage and amperage light bulb.8Place the generator in a breeze. See if the wind can provide enough power to light the bulb. (If there is not enough wind, electrical current can be generated by manually spinning the axle rapidly.Tips & WarningsBecause the wind is not always available, the propeller may not rotate the magnet quickly enough to light even a small electrical light bulb.
Where is the Audio Engineering Society located?
The Audio Engineering Society is a large international organization. They have over seventy-five different professional sections located throughout the world.
What does AG mean?
In essence - it means "Incorporated" i.e., Inc. Generally only used in very large companies - for example "Daimler-Benz AG" etc etc
Why do levers have a greater mechanical efficiency than other simple machines do?
You can move a large load using a relatively small effort. http://www.deyes.sefton.sch.uk/technology/AS&Alevel/mechanical_systems.htm
Why do farmer use drilling machine?
Anyone uses a drilling machine to drill accurate or large holes. I don't see any difference whether the operator is a farmer or a mechanic or a carpenter. The principle of drilling is the same.
Are there black holes the size of stars?
The relevant magnitude is mainly the black holes' mass. Since black holes are the result of collapsing stars, yes, there are black holes with the mass of a star.The diameter is usually taken as the diameter of the event horizon. This diameter is directly proportional to the mass; a supermassive black hole such as Sag A* has a diameter comparable to that of a large star.
Spalls are small holes that do not penetrate through the pavement surface and are how large?
up to 5 ft in diameter
What is the specific use of a drilling rig?
The specific use of a drilling rig is to create holes in the ground. A large machine house equipment used to drill water wells, mineral deposits, test rock, soil, and groundwater.
What are the function of drilling machine?
There are many advantages, mainly concerning the amount of different tools you can use in them. The bench drill press can take bits of up to 1/2 shank size and many of those are drill bits up to an inch wide. ( it's quite common to have large drills with reduced shanks) -Other items like large hole saws can be used, as well as 'fly cutters', which are cutting bits on the end of a movable beam. These can usually cut holes in thin materials like plexiglass sheet, up to a foot in diameter. Forstner bits up to 6 or 8 inch can be used, these cut large, flat bottomed holes for installing clocks and other instruments. Milling bits can be used to 'mill' large areas of rough surface to smoothness, and 'square hole tools' can also be used. The large drill press is a very versatile tool.
What is core drilling?
A core drill is a drill specifically designed to remove a cylinder of material, much like a hole saw. The material left inside the drill bit is referred to as the core. Diamond core bit is commonly used in construction to create holes for pipes, manholes, and other large-diameter penetrations in concrete or stone.
Where did ancient Egypt get most of its gold?
The Egyptians mined large blocks of rock by drilling holes in a line in a rock's surface. The holes were filled with wedges of wood. Wetting the wooden wedges caused them to expand, and after a period of time, the rock split along the line of the drilled holes.
What are the advantages of using a pillar drill?
A pillar drill can be used to drill pieces of metals, plastics, and woods. Since it is a big drill, it can be used on large pieces of material to produce big holes.
Which is safer using net with large holes or spearfishing?
net with large holes
How specify drilling machine?
A vertical drill press is a large drilling machine that stands on a very heavy steel base. A 3" steel column extends up either about 6 feet for a floor model or 3 for a bench model. At the top of this column is an elongated box with the motor at the back, driving a shaft with a 4 tier pulley above it. The front of the box contains a hollow shaft with a spindle inside it. The spindle also has a 4 tier pulley on top. The hollow shaft can be wound up and down by the side control lever. lowering or raising the drill shaft and chuck, A belt between the 2 pulleys drives the spindle and the chuck connected to it's lower end. In the middle of the column, a table, usually about 15 " square can move up and down the column to adjust work height.
How large ia an 8in diameter plate?
how do you measure diameter
What is a cement drill called?
typically referred to as a core-drill, it anchors to a surface and drills out large diameter holes......... actual drill bits for small holes (the type you'd use in your 3/8 drill or cordless) are carbide bits, and can also drill throgh ceramic tiles
