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Monthly Archives: March 2015

Maintenance of vacuum degasser

Vacuum degasser for drilling fluid processing applies to all types of mud purification system. It plays a very important role in
recovering the proportion of mud, steadying viscosity performance of fluid and reducing drilling cost. At the same time, it can also
be used as a high-power blender when the drilling fluid has no gas.

The maintenance of vacuum degasser for drilling fluid processing in daily use is more important than the repair after it breaks down.
So I’d like to introduce several tips about the maintenance.

vacuum degasser

Firstly, the vacuum degasser for drilling fluid processing should be washed after use. The rotor and the suction pipe in the vacuum
tank should be cleaned. You should cut off the power supply, remove the blocking plate of the hole, and check components whether it
is damage or not. You could wash the tank wall and the rotor by using high-pressure pipe. All the cleaning work should be done after
each use to ensure the normal use.

Secondly, the top cover of vacuum tank should be cleaned once a week in order to avoid debris blocking the gas channel. When it is
washed by water, you should rinse off the vacuum line and remove the screw plug and table seat. High pressure pipe is inserted into
it for 3~5 minutes each time.

Thirdly, for the vacuum pump, you should always check working condition of bearing and lubrication condition. The bearing is 15~20
degrees higher than ambient temperature on normal working condition. When working temperature of vacuum degasser for drilling fluid processing is higher than 30 degrees, you should always check the vacuum gauge, replace water in separator of steam and water in
time, and maintain the water temperature less than 35 degrees.

Mud desanders for sale

Drilling fluid desander is the second stage of solid control equipment of solid control system. Desander is a efficiency unit which can eliminate solid particles whose diameter is 45-75um.

desander

Desander is mainly constitute of a soft hookstrip bottom shaker, hydrocyclone units, vibration motor and inlet and outlet pipe. The most important part of the desander is the hydrocyclone, different quantity and size define the flow of the desander. Now let me introduce you the features of our high quality hydrocyclone.

1. Polyurethane(PU) Material or high-chromium cast iron for drilling fluid desander cones with longer using life.

2. Clamp type for easy maintenance.

3. Compact design with small footprint.

4. Flexible options for 1, 2 or 3 for different capacities.

5. Flexible fast connection is available for user assembly.

DC Solid control is a professional manufacture of desander for many years, we can manufacture it according to users different requirements to accord with the use of construction site

Double deck shale shaker for sale

Shale Shaker is the first stage solids control equipment in drilling fluids recycling system; it is also the most important equipment. Meanwhile, there are many different type and models shale shaker used in oil& gas drilling, HDD, CBM, waste water treatment and ect.

Now, please let me introduce you a special type and model shale shaker produced by DC Solid control- double deck shale shaker (DCPTS850-2K).

double deck shaker

DCPTS850-2K double deck shale shaker is the advanced shaker model promoted by China leading solids control company- DC Solids Control Co., Ltd. It is widely used in waste management and compact mud system.

Double deck shale shaker has two layers screen, the size of upper one is 850x1250mm, and the below is 740x950mm. Some users choose it as a better replacement of high G shaker. It can better dry cuttings with the 2 screen deck.

Double deck shale shaker DCPTS850-2K used for small mud system to make the system for compact. Usually, the bottom deck will be used as shale shaker, while the upper deck used as mud cleaner together with desander/desilter cone assembly. The total machine takes a smaller footprint but act as 2 separated machine. And surely, the cost is much lower than a separate shale shaker and mud cleaner.

A special pump in solid control system

There are many pumps for deliver drilling fluid from a solids control equipment to another in the solids control system. A submersible slurry pump is a kind of drain pump that is heavy and robust to a certain degree than the centrifugal pump. It is used to perform applications that are abrasive and tough.

Submersible slurry pump is with structure of vertical single stage and single suction system overhung centrifugal pump, it is made of abrasion-resistant alloy, it can convey medium with high concentration particle. There is no bearing and Gland Seal between impeller and pump body, so the slurry pump is maintenance-free and heat-resistant, the slurry pump is the ideal centrifugal pump for solids control system.

slurrry pump2

The motor of submersible pump uses a drive shaft which turns an impeller, generating velocity to create the pressure needed to discharge unwanted water. Water is sucked up through the bottom of the pump and redirected into the sewer, a septic tank or simply outdoors away from the home. This is the main function of all sump pumps, submersible pumps use the slightly modified method of being underwater pump.

Submersible pumps are found in many applications. Single stage pumps are used for drainage, sewage pumping, general industrial pumping and slurry pumping. They are also popular with pond filters. Other uses for submersible pumps include sewage treatment plants, seawater handling, fire fighting (since it is flame retardant cable), water well and deep well drilling, offshore drilling rigs, artificial lifts, mine dewatering, and irrigation systems.

Model of DCSB series centrifugal pumps

Centrifugal pump is also called sand pump which can transport drilling fluid to desander, deilter, tank and tanks. it also it can be
used as trip pump and supercharging pump for rig mud pump.

The sand pump is horizontal electric skid package are fabricated on a steel channel base; side overhead belt skid package are mounted
on a small footprint; vertical electric skid package require the least space; close coupled horizontal model also require the least
space to mount and eliminate pump & driver alignment concerns.

sand pumps

Features
1.Semi open impeller design
2.SKFor FAG premium bearings
3.Cemented carbide mechanical seal
4.Wide range application

DCSB Series centrifugal pump adopts mechanical seal. Most parts are interchangeable provide convenience. There are six models of the
DCSB serial centrifugal pumps, namely SB8×10, SB6×8, SB5×6, SB4×5, SB3×4 and SB2×3, with engine power ranging from 4Kw to
110Kw, totaling more than 80 of specifications.

Why dual motion shale shaker is saleable

Shale shaker is the first stage separation equipment in drilling fluid system. Shale shaker is divided in to linear motion,
elliptical motion and circle motion shale shaker according to motion locus.

Dual motion shale shaker combined linear motion shaker and balanced elliptical one. However, the dual motion shale shaker fixed with
3 motors. Each of them are much heavy and they can’t be uninstalled either one. As we know, the shaker performance is rather
important for whole system since it is the first stage solids control equipment. And the shale shaker will be affected by its own
weight, the mud conditions, the actual drilling situation, etc.

dual motion shale shaker

Features of dual motion shale shaker
1. Linear motion for fast conveyance and heavy loading; balanced elliptical motion for maximum retension time and drier cuttings.
2. Elliptical motion at the flip of a switch without stopping the shaker.
3. Balanced basket functions flawlessly in either linear or balanced elliptical mode, with dry. light loads or heavy loads.
4. Most reliable mechanical jacking system in the industry-simple and easy to use;
5. Adopted mud splash preventing device and electro-hydraulic system to adjust the screen box dip angle to make the process more
convenient and keep the equipment clean.

We also can design and produce all kinds of size dual motion shale shaker according to different requirements, if you have any
request about the shale shaker, please feel free to contact us, believe you will get the satisfactory sollution from DC Solid
control.

Northern Petroleum Agrees Cascina Alberto Farm-Out with Shell

Junior explorer and producer Northern Petroleum announced Thursday that has agreed to farm out an 80-percent equity interest in the
Cascina Alberto permit, in the Po Valley onshore Italy, to Royal Dutch Shell. In return, Shell will pay Northern $850,000.

Northern said that the deal will also see Shell pay for the costs of the exploration campaign on the permit, which will include a
carry on the acquisition of any new seismic data up to a cost of $4 million and a carry on any exploration well until the well costs
reach $50 million. Shell will also have a pre-emptive right over Northern’s remaining interest in the Cascina Alberto permit in the
event of any change in control at the asset or northern CEO Keith Bush commented in a company statement:

“This farm in demonstrates the value inherent in Northern’s Italian asset portfolio. Northern will continue to progress its permits
and applications with the Italian authorities and partner with companies with larger resources, where appropriate, to maximize their
value.

Operational guidelines of shale shakers

The importance of shale shakers as the primary solids control equipment capable of handling the full returns from the wellbore cannot
be over stressed. Solids passing through the shakers will be re-circulated, during which they will be reduced in size. Wear and tear
on pumps and tubulars will be the result and the reground cuttings will be even more difficult to remove on their next pass. If the
solids are reactive they will require costly chemical treatment and/or whole mud dilution.

shale shaker

Details of operational guidelines

1. Shale Shakers shall be switched on immediately before running in the hole to cope with mud displaced by the drill string.
2. Coarse mesh top screens shall be used on double deck shakers, to remove the bulk of the large cuttings and thus enable finer
screens on the lower deck to function more efficiently.
3. Initially, shakers should be fitted with relatively coarse screens, such as 80 mesh, for running in the hole and breaking
circulation.
4. With new water based polymer mud, or with cold oil based mud after trips, screen blinding may occur during the initial period of
circulation. After 1 or 2 circulations, the screens may be changed to finer mesh as the polymer shears, or the mud heats up.
5. The finest mesh screens shall be selected, taking into consideration maximum solids separation whilst ensuring that whole mud is
not lost and screens are not overloaded.
6. Screens should be changed to a finer mesh and square mesh screens should be changed out to equivalent rectangular mesh screens in attempts to alleviate problems of sand blinding.
7. Screens shall be inspected regularly and changed out immediately when found as defective. Operations must not be allowed to
continue with a torn or ineffective screen.
8. Shaker screens shall be washed down regularly with water eg., on connections, for ease of inspection, to maintain screening
efficiency and to prolong screen life.
9. Shakers shall be switched off immediately prior to tripping out of the hole. Care must be taken to ensure that the shakers are
started before breaking circulation for any reason, e.g. backreaming and pumping out.
10. Shakers shall be switched off immediately prior to tripping out of the hole. Care must be taken to ensure that the shakers are
started before breaking circulation for any reason, e.g. backeraming and pumping out.

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