Electrical Satellites & wellhead Platforms Senior Technician
Wellhead equipment are used in connecting the casing and tubing to an oil or gas pipeline. These are useful in suspending the casing strings and help seal the well. The casing is a permanently-installed pipe for lining the well hole to provide pressure containment and prevent collapse. Wellhead equipment are known as the flanged devices that are attached to the casing and they include a number of other components such as casing heads, casing spools, tubing head spools, tees, and crosses. The casing head is part of the connection between the casing and the wellhead equipment itself. Usually, many pieces of wellhead equipment are assembled together into one a single unit that is called a "Christmas tree". These are important for the tubing to be placed into the well while valves and chokes are used to control the flow of oil and/or gas at the surface. Wellheads and and its components may be located on offshore platforms, in sub-sea locations, or onshore.
Use a self propelled FLOAT/CAP based on bathyscaphe technology; the cap has neutral buoyancy, maneuver the cap over the damaged wellhead to enclose it (The cap has a new wellhead mounted on top). the effect is like if the bottom of the sea was raised and with an entirely new wellhead.
aps 98
about 150 00 an hour
Wellhead Equipment is a very important piece of oilfield equipment. We can classify Wellhead Equipment as conventional components. Wellhead products that consist of base plates which are easily detachable from the casing head for reattaching and welding. Such Equipment provides extra load for supporting the higher case loads. Wellhead casing has a straight bore design that accepts casings of different hangers. The line pipe threaded outlets, studded or flanged outlets can be also provided. Bottom preps include a slip on weld and threaded connections. Casing hangers type of equipment combine pack off and slip bowl hangers. Wellhead is easy to install and is also fluted for allowing the cement returns. Wellhead Equipment can also be included as the casing spools that have a top bowl configuration. Equipment has locking pins. Wellhead secondary seals help in the installation of tubing heads and casing spools to provide pressure energized secondary seals. Wellhead tubing has a fully opened straight bore design with a dual completion head available and is compatible with a variety of tubing hangers.
1- Casing Head 2- Casing spool 3- Tubing Head
· wellborn · welled · wellhead · wellness · wells
1- Casing Head 2- Casing spool 3- Tubing Head
You disconnect the horizontal pipe from the vertical well pipe at the wellhead, and pull up the vertical pipe.
There really isn't any statistics. A naturally flowing well must have a well head pressure sufficiently above atmospheric to be able to flow into the separator. A well under natural pressure depletion and flowing conditions will have a declining wellhead pressure, but if artificial lift is installed, the well head pressure can markedly increase.
Term "production" means outflow from well. Master valve and wing valve are both on X-mas trees installed above wellhead. Fluid comes to the surface will pass Master (main isolation) valve first, then to the wing valve. Afterwards, go to the choke valves for pressure control before directing to downstream process.
There are basically 2 types of rigs. 1) Drilling Rig The function of this rig is drilling a well down to the production zone then installs a casing in it. There are various types for offshore drilling and there are types for onshore drilling. 2) Production Platform (Offshore) The function of this rig is for producing oil. It consists of not only a single well like on an onshore pad, but I have seen platforms with 20 to 50 wells. They are not drilled straight down like most onshore wells, but they are deviated and get drilled in and arc, away from the platform and ends up being somewhat horizontal. Wells can be anything from 1000+ and up to a few thousand feet deep. A work-over rig on the platform uses equipment to perforate the casing at the desired production zone and a screen is installed to minimize sand flowing into the well. Pumps are installed into wells to produce the oil. Depending on how far the platform is located from land, a pipe line can tranport the oil to land or in most cases where platforms are to far offshore, the surrounding platforms pump the oil to a FPSO which is basically a huge oil tanker that transfers oil to oil tanker ships. Onshore operations are different. A well is drilled and a wellhead is installed. Piping from the wellhead leads to a manifold which is connected to the surrounding wells. From there oil gets pumped to gathering stations then to refineries.