Basically, a screen acts as a “go/no-go” gauge: Either a particle is small enough to pass through the screen or it is not. Screening surfaces used in solids control equipment are generally made of multi-layered woven wire screen cloth and are the “heart and soul” of the shaker.
Fundamentally, the quality of a shaker is defined by the quality of screens it utilizes. When selecting a solids control system it is important that the quality of the screen manufacturing and level of experience by the in manufacturing screens is considered.
If the system is appropriately set up with a scalping system and a fine shaker screen system, the scalping screens must be sized just coarse enough to ensure that drilling fluid does not sheet off the shaker (i.e. whole mud losses). This happens when the scalping screen is too fine to allow the drilling fluid to pass into the solids control system’s dirty tank.
Typical scalping screen configurations for HDD applications range from 50 mesh (API 50) to 120 mesh (API 100). Typical fine screen configurations range from 160 (API 120) to 200 mesh (API 170). The API 13C classification is gaining traction in the HDD industry as more contractors focus on the micron cut point they are trying to achieve in their fluid.
Relative to the use of shaker screens, it is the size of the screen openings, not the mesh count that determines the size of the particles separated by the screen. It is because of this fact that HDD system users should compare and specify screens based on their API 13C designation.
The Bowl of DCLW450X1350N（VFD) centrifguge comes with a standard “VFD Ready” drive system which allows for full variabilityon both the main and back drive motors through VFD’s. The bowl is driven by a 45KW inverter duty main drive motor and the conveyor is driven through a planetary gear box (49:1) with a 11KW HP inverter duty back drive motor. The MegaBowl™ is engineered, plus more than twice the processing capacity.
All major rotating assembly components are manufactured from centrifugal castings or forgings of either Duplex 2205 SS, or 316 SS. Bowl of DC centrifgues case is 316 SS. All major wear areas are protected with tungsten carbide and/or Stellite. This unit is manufactured to operate in a Class 1, Division 1 environment.
Main parameters of DCLW450X1350N（VFD) centrifguge:
1. Bowl length is 1350mm and diameter is 450mm.
2. The max treating capacity is 60m3/h
3. Matched 45kw main drive and 11kw back drive.
4. Bowl speed(VFD) is 0-3200rpm.
The High-speed DCLW450X1350N（VFD) variable frequency centrifuge with its unique advantages, is increasingly favored by more and more users. Welcome to at home and abroad send inquires to DC Solid control.
Drilling mud’s use in oil and gas operations can be simplified with an efficient and effective separation system. In the past, mud was discarded and not recycled or reused. This was costly and wasteful. Mud separation systems remove debris from the reusable mud.
Two new, three-phase liquid-solids environmental separation systems have been developed.
The system is made up of three phases that condition, clean and separate the mud for reuse. These phases are performed in a continuous and in-sync operation with final discharge controlling the entire operation.
In Phase One, the slurry is passed over an unbalanced elliptical shale shaker to remove the large material. This phase removes all large foreign items that are larger than 30 mesh.
After the larger foreign material is removed, the remaining slurry passes through the first set of 4-inch hydrocyclones in Phase Two. This phase removes finer sands and coarser silts. The hydrocyclones’ underflow is deposited on an elliptical shale shaker screen for drying. The screen selection size is adequate to capture and dry the silts and sands. Cuts are down to 30 microns.
The slurry then passes through a second bank of 2-inch hydrocyclones to make the final cut, which includes the fine silts and non-hydrated clays. The underflow from these hydrocyclones is deposited on an elliptical shale shaker screen for drying. Screen selection plus clay piggybacking are adequate to capture and dry the fine silt sand clays. Cuts are down to 10 microns after this phase.
Modern drilling rigs are continuing to set standards by drilling deeper, faster and longer. As such, the oil and gas industry has seen a substantial increase in the volume of waste solids and liquids being generated from the solids control system.
here has never been a more critical time to manage drilling fluid and the associated wastes as an integral and inherently inseparable element of an effective solids control system. This is especially the case when a properly deployed vertical cuttings dryer (VCD) can significantly reduce waste disposal costs, dramatically lower whole mud losses within those wastes, and improve the overall quality of the drilling fluid by allowing the shale shakers and centrifuges to be used at their full operating potential.
Common flow-line shaker cuttings can maintain an oil-on-cuttings (OOC) or water-on-cuttings (WOC) moisture content as high as 25 percent. As such—and on a conservative basis—an average well will lose approximately 5 gallons per minute of drilling fluid with the discarded flow-line shaker cuttings.
Decanter centrifuges and VCDs share several similarities; however, their objectives are quite different. Centrifuges are deployed to cut waste solids from the liquid stream. The cut is usually called the underflow (also solids discharge or cake), and the cleaned liquid stream (or centrate) is usually called the overflow.
Mud agitators are an important part of the mud solids control system. DC offers a variety of motor and impeller sizes to fit specific tank configurations.
DCJBQ extreme-duty mud agitators featuer the rugged and reliable Nord gear box for long-lasting performance. Along with the gearbox, all our Mud Agitators include an explosion proof motor, impeller and shaft assembly.
DC uses a Helical-Bevel gear unit to turn the impeller. This highly efficient gearbox offers a 95% power transfer, which is approximately 30% more than a worm drive gearbox. Helical-Bevel gearboxes are preferred over worm gear arrangements because of their power efficiency, reliability, and lower operating temperatures.
DC mud agitator is available in both horizontal and vertical configurations – sizes range from 5 to 30 HP. Derrick agitators carry a one year warranty. Welcome to your inquires.
The linear motion shale shaker and mud cleaner manufactured by DC Solid control has a National Day discounts and promotions at our workshop.
Shale shaker and mud cleaner are the most important equipment of solid control system and is the obbligato unit of whole mud cleaning system.
DC Solid control manufactured many different model shale shakers and mud cleaner for National Day discounts. The shale shakers and mud cleaners produced by DC Machinery have the advantages of large handling capacity, screening high precision, low-energy, environmental protection and so on.
DC Machinery also supplies high quality shale shakers, including Linear Motion Shale Shaker, Balanced Elliptical Motion Shale Shaker, etc. Meanwhile we can customized different quantity and size hydrocyclones for mud cleaners.
If you have requirements or interest with our product price, please send your details inquiry.
Mud Cleaner is the second class and the third class solid control equipment which are combined from desander , desilter and underflow screen to treat the drilling fluid
Mud cleaners were developed in the early 1970s to remove fine drilled solids from weighted mud without excessive loss of barite and fluid. They have also proved valuable tools in closed systems and other dry location applications. These devices use a combination of desilting hydrocyclones and very fine mesh vibrating screens (120-400 mesh) to remove fine drilled solids while returning valuable mud additives and liquids back to the active mud system.
Features of mud cleaners:
Shaker: quick screen tensioning system with easy replaced bolts;explosion proof and rated continuous vibration motor;
AWD system: screen basket adjusted within -1°～+5°at 0.5° increment;
feeder box with inlet connection locates on back 10″,1MPa flange.
Desander cones are 10″ or 12″ hydraulic cones and manifold which are made of high-chromium iron while desiter cones are 4″ or 5″ hydraulic cones and manifold of polyurethane.
Desander, desilter and shaker can be used together to process drilling fluid and can also
perform operation independently according to site situations.
Convenient dismantlement and transportation of two parts.
Traditional mud cleaners use multiple 4 or 5cyclones, mounted over a vibrating screen, and are able to effectively process 400-600 GPM. The process capacity is limited by screen capacity and its ability to discard dry solids. With the introduction of linear motion vibrating screens, the capacity of the mud cleaner screen has been greatly increased. This, in turn, allows the use of additional hydrocyclones and higher, overall process capabilities.
DC Machinery mud gas separators are designed to provide safe drilling procedures during horizontal, underbalanced, h2s, or high pressure drilling. Our gas buster captures and separates the mud/gas then safely vents free gas to the flare line to be burned off while returning mud to the mud pits.
DC Machinery separators are intended to sustain safety for high pressure wells or when sour gas may be present. Our units are closed bottom skid mounted model designed around safety and precision. Uniquely designed baffles break up mud and gas which is then expelled by the gas vent line to the flare line.
Highlights of Mud gas separators ：
Designed for horizontal, underbalanced, h2s, or high pressure drilling
Numerous size specifications available
ASME Sec VIII Div 1 Code Vessels
External Pressure Gauge
H2S certified with internal coating
The mud gas separator is manufactured for efficient installation from one rig move to the next. DC Machinery offers rig up of our gas buster and if needed can tie in and/or modify all lines from choke manifold to trip tank, frac tank, panic line, gas buster, and flare line. We supply competitive and cost effective connect and disconnect fees of our equipment.
Vacuum degasser, also known as a mud/gas separator is one of the first units of solids control equipment arranged to treat drilling mud.It is an online degasser system with high efficiency. Dissolved gases are removed from the solvents by applying vacuum to a semi-permeable membrane.
Vacuum degasser applies the vacuum pump suction to form a negative pressure region in vacuum cylinder. The drilling fluids is forced to flow into the hollow shaft of the rotator through suction pipe under the atmosphere pressure. After that, the fluids sprays to cylinder walls out of hollow shaft windows.
Features & Benefits of Drilling Fluids Vacuum Degasser
1. Self contained unit without need for drilling fluid centrifugal pump to feed drilling mud.
2. Eliminate corrosion and reduce reparation and maintenance costs.
3. Short footprint,can be installed in smaller spaces.
4. Drilling fluids degasser can act as a big agitator for the drilling mud, which helps the treatment for drilling fluid desander and drilling mud desilter.
You are welcome to contact with DC Solid control to get more detailed infos, we will supply cost-effective vacuum degasser and satisfactory pre-sale, sale and after-sale technical services.
Sept 16 (Reuters) – U.S. drillers this week added oil rigs for an 11th week in the past 12, according to a closely followed report on Friday, although the rate of increases has slowed as crude prices remain below the key $50 a barrel level that spurs a return to the well pad.
That is, however, the longest streak of not cutting rigs since 2011 with the rig count increasing or holding steady every week so far this quarter.
Drillers added two oil rigs in the week to Sept. 16, bringing the total rig count up to 416, the most since February but still below the 644 rigs seen a year ago, energy services firm Baker Hughes Inc said.
The oil rig count plunged from a record high of 1,609 in October 2014 to a low of 316 in May after crude prices collapsed in the biggest price rout in a generation due to a global oil glut. That decline continued through the first half of this year when drillers cut 206 rigs.
U.S. crude futures were trading at around $43 a barrel on Friday after hitting a five-week low on renewed oversupply fears. They were on track to fall 6 percent for the week on Friday.
“With a large proportion of (rig) gains from smaller operators and oil now sub $45 we would not be surprised to see a flattening or even decline over the next few weeks,” analysts at U.S. financial services firm Cowen & Co said in a report this week.
Longer-term, however, analysts expect the rig count to rise slowly for the rest of 2016 before jumping higher over the next two years with a rebalancing of supply and demand. While U.S. oil futures for the balance of 2016 are only fetching around $44 per barrel, calendars 2017 and 2018 are trading near $48 and $50, respectively.
Analysts at Simmons & Co, energy specialists at U.S. investment bank Piper Jaffray, forecast total oil and natural gas rigs would average 498 in 2016, 704 in 2017 and 981 in 2018.
That, however, is not much higher than the average 479 oil and gas rigs that Baker Hughes said were active since the start of the year. In 2015, the total rig count averaged 978.
Since total rigs fell to 404 in May, the lowest since at least 1940, Baker Hughes said more than two-thirds of the additions have been in the Permian basin in west Texas and eastern New Mexico, the nation’s largest shale oil play.
Anadarko this week said it would boost capital spending and add four rigs by the end of the year, two in the Delaware basin in the Permian and two in the DJ Basin in Colorado.