Shaker screens are one of the most important, (and overlooked) pieces of equipment on the drilling rig. The Shale Shakers are your first line of defense against drilled solids & your primary solids control equipment. They are a key factor in determining the success of your drilling mud and centrifuge.
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Shaker screens selection is critical in the operation of a drilling rig, as the shale shakers are the primary stage of drilling mud solids control system. Shaker screens can remove the solids that are larger than the screen mesh openings. The drilling mud with small solids would flow through the screen meshes, and down to the mud tank for a further purification. while the large solids or the cuttings would stay on the screen, and be vibrated and flow to the discharge end of the shaker basket.So it is really important to have the right shaker screen selected for your formation cuttings, bit type, and mud properties. On surface holes drilled solids are usually larger solids which can be removed easily with a coarse mesh shaker screen. A mesh of 50, 84 or 110 is usually adequate. However, intermediate and main hole cuttings are typically finer &#; therefore requiring a finer mesh. A minimum mesh of 110 is kindly recommended all the way up to 320&#;s & beyond for very fine sand.
When selecting a screen, end users should pay special attention to the screen design and the size of the opening. Most manufacturers focus on the frame structure and shaker fastening applications. However, focusing on a multilayered, wire cloth formula and wire diameter is critical. One manufacturer&#;s bottom layer of screens is comprised of thicker, market-grade wire. This yields a stronger base, which allows the other layers to maximize performance during the most severe conditions.
We must choose a proper shaker screen according to the solids diameter, mud gravity, viscosity & density etc. As improper screen selection can lead to loss of expensive drilling fluids, premature pump failures, overloading of other solids removal equipment such as a decanting centrifuge, decreased equipment life, reduced rate of penetration and serious problems in the well bore.
Maintaining your shaker screens is as important as the screen selection itself. In normal drilling it is important to ensure that the fluid comes about 25%-50% of the way across the screen furthest from the flow line. Try to have the Shaker deck as level as possible. This will allow for more consistent wear across the screens and typically means that the right size mesh has been selected. Jacking or raising the Shaker deck up, increases the amount of time that the solids will be on the shaker screens closer to the flowline. This will decrease the shaker screen life. Be careful when cleaning shaker screens, not to puncture the mesh as this will diminish the effectiveness of the screen. A shaker screen with the top layer of mesh gone is also less effective and should be replaced.
When a shaker screen has a hole in it there is no protection against drilled solids. Why leave things to chance. This will have a dramatic effective on your drilling fluid. Replacing a shaker screen is a lot cheaper then replacing a mud system, or rebuilding mud pumps & directional tools; not to mention the increased costs on the completions side of the well. It is also important to ensure that the shaker deck rubbers, shaker bypass and other shaker components are in good working order at all times. If you open the bypass while drilling, all the shale goes below the shakers and into the mud tanks &#; providing zero efficiency.
Please try above tips for increased success on your current or future drilling project
Shale shakers for solids control are devices that remove drill cuttings from the drilling fluid while circulating and drilling. There are many different designs such as linear motion shale shaker, balanced elliptical shale shaker, dual-deck shale shaker, dual tandem shale shaker, and high G shale shaker. How to select a favorable drilling shale shaker for our Jobsite, there is some advice as below.
Firstly, to confirm the treating capacity
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Different drilling rigs drilling depth, the treating capacity will be different. For oil and gas customers, their drilling depth may be from m to m; while for geothermal customers, their drilling depth is less than m. Suppose the drilling depth is between to meters, capacity is about 120 cubic meters per hour. AIPU hot sale shaker Hunter-MG3, 2 sets are proposed for the whole mud system. We used a butterfly valve-flange connection between the shale shaker and the outlet of the borewell. At the drilling beginning, the speed will be very fast, we can open two butterfly valves to use two shakers to process the drilling mud. During the middle and end period, one shaker will be enough. So please provide the capacity or drilling depth to sales first.
Second, to confirm the shale shaker type
Linear motion shale shakers represent the newest shaker technology and are the most common approach to solids control in the oil and gas drilling industries. They produce linear motion via a pair of eccentric shafts rotating in opposite directions. Linear motion provides superior cuttings conveyance and is able to operate at an uphill slope to provide improved liquid retention.
Balanced elliptical motion shale shakers are especially effective while drilling top-hole sections where heavy, high-volume solids are present. On a balanced elliptical shale shaker, the difference in power between the two vibrating motors results in an unbalanced force. With this setup, elliptical motion shakers can effectively remove solids and eliminate larger particles in drilling fluids. The relatively moderate vibration strength of balanced elliptical shale shakers can reduce screen consumption.
Finally, some special requirements
During the communication, some customers request higher treating capacity, but they have a space limit, dual-deck shale shaker will be more suitable based on this situation. Some clients prefer the single deck shale shaker, they request big capacity as well, we can customize a pyramid shaker screen for their application. If the user has no special requirements, we prefer single deck shale shakers more, as it has advantages of less wearing parts, easy maintenance, and convenient operation.
AIPU shale shaker features
For the AIPU shale shaker, we utilize Martin vibration motor or Oli motor. These motors hold high vibration strength and reliable quality. The shaker screens are installed by the wedge blocks. That makes screens easy to install and uninstall. The main profile or sheets for the shaker will be cut by the laser cutting machine. It helps to keep accuracy and better appearance.
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