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What is the difference between a Christmas tree control and wellhead?
Many times, the words Christmas Tree and Wellhead are used interchangeably; however, a wellhead and Christmas tree are entirely separate paces of equipment. A wellhead must be present in order to utilize a Christmas tree and is used without a Christmas tree during drilling operations.
What is Christmas tree valve?
Christmas tree valves are a system of valves, chokes, spools, and gauges which, unsurprisingly, resemble a Christmas tree. These valves also serve many other purposes such as to relieve pressure, inject chemicals, monitor safety equipment, provide electrical interfaces for control systems, and much more.
What is a Christmas tree subsea?
A subsea Xmas tree is basically a stack of vertical and horizontal valves installed on a subsea wellhead. It is installed provide a controllable interface between the well and production facilities.
Related Question What is the difference between blowout preventer and Christmas tree?
How many valves does a Christmas tree have?
Christmas tree has two master valves referred to as the upper and lower master valves. The lower master valves are opened first and closed last.
What is a Christmas tree in the oil industry?
A Christmas tree is a piece of equipment that provides flow control on a oil or gas well. Christmas trees are a vertical assembly of valves with gauges and chokes that allow for adjustments in flow control as well as injections to stimulate production.
What is SSV valve?
Surface safety valve (SSV) is a pneumatically or hydraulically actuated fail-safe gate valve for producing or testing oil and gas wells with high flow rates, high pressures, or the presence of H2S.
What is Wellhead Control Panel?
Performing a safety critical function on manned and unmanned platforms, our Wellhead Control Panels (WHCPs) are designed for monitoring, controlling and shutdown of various subsurface and surface valves.
What is the function of wellhead?
The primary purpose of a wellhead is to provide the suspension point and pressure seals for the casing strings that run from the bottom of the hole sections to the surface pressure control equipment. While drilling the oil well, surface pressure control is provided by a blowout preventer (BOP).
What is Surfaceflow tree?
SFT is a API 6A monogrammable product. Available in rated working pressures upto 20,000psi. Available in PSL1,PSL2, PSL3 and PSL 3G levels depending on the requirement. Our Surface Test Trees include a kill inlet valve, wab valve, master valve and a hydraulically actuated fail safe close outlet valve.
What is a subsea XT?
Subsea tree (wet trees) is a system of valves, flow paths, piping, and connectors installed on a subsea wellhead to contain and control the flow of fluid from a reservoir or from the surface by injection.
Why did the Deepwater Horizon blowout preventer fail?
The CSB concluded that the blowout preventer (BOP) failed because miswired control systems would have prevented it from sealing the blown-out well. A blowout preventer is a multi-ton stack of valves and pipes that sits atop deepwater wells to stop oil and gas from gushing upward in an accident.
How is a blowout preventer installed?
Land and subsea BOPs are secured to the top of the wellbore, known as the wellhead. BOPs on offshore rigs are mounted below the rig deck. Subsea BOPs are connected to the offshore rig above by a drilling riser that provides a continuous pathway for the drill string and fluids emanating from the wellbore.
What is a blowout preventer stack?
The blowout preventer assembly is mounted on the top of the casing head during drilling operations. Its purpose is to prevent the contents of the annulus from being aggressively emptied into the atmosphere when the bit drills into an unexpectedly high pressure zone.
What is a valve tree?
In petroleum and natural gas extraction, a Christmas tree, or "tree", is an assembly of valves, casing spools, and fittings used to regulate the flow of pipes in an oil well, gas well, water injection well, water disposal well, gas injection well, condensate well, and other types of well.
What type of valve is a wing valve?
Kill wing valve (KWV). It is a manually operated valve used for the injection of fluids such as corrosion inhibitors or methanol to prevent hydrate formation. In the North Sea, it is called the non-active side arm (NASA).
What is the swab valve?
1. n. [Well Workover and Intervention, Well Completions] The topmost valve on a Christmas tree that provides vertical access to the wellbore.
What is upper master valve?
A valve located on the Christmas tree that controls all flow from the wellbore. The upper master valve is used on a routine basis, with the lower master valve providing backup or contingency function in the event that the normal service valve is leaking and needs replacement.
What is Xsv valve?
The upstream process shutdown valve (XSV) was being used as a barrier against the pressure from the scrubber. The XSV was programmed to open at 50% level in the scrubber, resulting in a gas/condensate/water leak from the level control valve.
What is Scssv valve?
1. n. [Well Completions] A downhole safety valve that is operated from surface facilities through a control line strapped to the external surface of the production tubing.
What is a USV valve?
USV valves are designed for manual hydronic balancing of heating and cooling systems. USV-I (red knob) is used together with USV-M to limit the flow in heating or cooling installation or can work separately as manual balancing valves for flow limitation.
How does SSV valve work?
The Cameron safety shutdown valve (SSV) control system provides fail-safe shutdown of flow when pressure in the flowline falls outside a preset range. In the event of hydraulic control line pressure loss, the valve moves to the fail-safe position.
What is wellhead maintenance?
This includes the routine inspection, repair and maintenance of surface wellheads, as well as the provision of pressure testing services.
What are the main types of WHCP?
Single well control panel is categorized the following system according to driven resource:
How many types of wellheads are there?
Oil and gas well wellhead equipment can be divided into three types: flowing well wellhead equipment, pumping well wellhead equipment and gas well wellhead equipment.
What is choke valve in wellhead?
A choke valve is a mechanical device that induces restriction in a flow line, causing either a pressure drop or a reduction in the rate of flow. See Figure 1. In the context of the upstream oil and gas industry, choke valves are used wherever there is a requirement for wellhead flow and pressure control.
What is a subsea wellhead?
The subsea wellhead system (Fig. 1) is a pressure-containing vessel that provides a means to hang off and seal off casing used in drilling the well. The wellhead also provides a profile to latch the subsea blowout preventer (BOP) stack and drilling riser back to the floating drilling rig.
What is a subsea manifold?
A manifold is an arrangement of piping and/or valves designed to combine, distribute, control, and often monitor fluid flow. Subsea manifolds are installed on the seabed within an array of wells to gather production fluids or to inject water or gas into wells.
How does a subsea Christmas tree work?
The functional requirements of a subsea tree are broadly similar to those of a land or platform tree: It is a vital component in the well integrity barrier envelope. It attaches to the wellhead and directs flow through a series of valves to the flowline. It is used to isolate flow from the well.
What is a manifold in oil and gas?
A manifold is a system of headers and branched piping that can be used to gather or distribute fluids, as desired. Manifolds can be used to gather produced fluids and direct selected wells to a well test line, as well as to distribute injected fluids (gas or water) or gaslift gas to individual wells.
Is Deepwater Horizon still leaking?
After several failed efforts to contain the flow, the well was declared sealed on 19 September 2010. Reports in early 2012 indicated that the well site was still leaking. The Deepwater Horizon oil spill is regarded as one of the largest environmental disasters in American history.
Did anyone from BP go to jail?
(Reuters) - A former BP Plc BP. L rig supervisor who pleaded guilty to a misdemeanor charge in the 2010 Gulf of Mexico oil spill was sentenced to 10 months of probation on Wednesday, concluding a federal criminal case in which no one received prison time over the disaster.
Did Mike Williams jump off Deepwater Horizon?
Did Mike Williams really jump from an incredible height to escape the burning rig? Yes, the chief electronics technician on the Deepwater Horizon, Mike Williams (Mark Wahlberg in the movie), jumped 10 stories into the Gulf of Mexico in order to escape the flames that had engulfed the rig.
Who makes blowout preventers?
B.O.P. Products, LLC is a licensed manufacturing facility in Houston, Texas. We manufacture, repair, and service oilfield equipment such as blowout preventers, ram blocks, and blowout preventer replacement parts. Founded in 2005 in a 5,000 square foot facility, now operating in an over 200,000 square foot facility.
What is the difference between an annular preventer and a ram preventer?
So what's the difference between annular BOPs versus ram BOPs? The annular BOP helps seal the space around the drill pipe (also known as annular space) during a “kick.” But, a ram BOP is designed to seal off a well when the drill pipe, tubing, or casing is in the well.
Who made the Deepwater Horizon blowout preventer?
NEW ORLEANS - Cameron International, the maker of the Deepwater Horizon blowout preventer that failed to stop last year's massive oil spill in the Gulf of Mexico, has agreed to pay $250 million to BP under a legal settlement, BP said Friday.
How tall is a blowout preventer?
FEATURES OF RAM BLOWOUT PREVENTER(BOP):
Size range: 7 1/16” to 26 3/4" It reduces risk by shutting down wells in case of emergency.
What is kelly bushing?
1. n. [Drilling] An adapter that serves to connect the rotary table to the kelly. The kelly bushing has an inside diameter profile that matches that of the kelly, usually square or hexagonal. It is connected to the rotary table by four large steel pins that fit into mating holes in the rotary table.
What is an annular on an oil rig?
1. n. [Drilling] The space between two concentric objects, such as between the wellbore and casing or between casing and tubing, where fluid can flow.
What are the parts of a Christmas tree?
The elements that go into decorating a Christmas tree—lights, garland, tinsel, and ornaments—are familiar to nearly everyone.
What is Christmas tree wellhead equipment?
Christmas Tree or Wellhead? A Christmas Tree is an assembly of valves, spools, and fittings used for an oil well, gas well, water injection well, water disposal well, gas injection well, condensate well, and other types of wells. It is named for its resemblance to a decorated tree at Christmas.
What is lower master valve?
The lower master valve is a gate valve used to limit the amount of flow into the Christmas tree from the wellhead. It is manually actuated in most cases and is kept in a restricted, partially open position during production.
What do the valves on a Christmas tree do?
…valves, referred to as a Christmas tree, is installed at the top of the well. The valves regulate flow from the well and allow tools for subsurface work to be lowered through the tubing on a wire line.