Sand Control Screens for Oil & Gas Industry. From the inception of the company, CP Screens has been designing and manufacturing Downhole Sand Control Screens for the Oil and Gas industry. CP Screens has a broad product offering for Direct Sand Retention and Gravel Pack Screens for Cased Hole, Open Hole and Remedial Sand Control Applications including Wire Wrap Screens and Prepack Screens. Our Wire Wrap Screens (CP- Wrap) range in size from 2- . Find great deals on eBay for sand screens rock screens. Shop with confidence. These screens are used in direct retention for relatively uniform reservoir sands in open hole applications or in gravel pack completions in an open or cased hole. Our Prepack Screens (CP- Pack) range in size from 2- . Our manufacturing process and Quality Control ensures the annulus is free from voids providing 1. Traditionally used in long open hole horizontals and cased holes which are difficult to obtain complete packs, CP- Pack provides the additional insurance of sand control integrity beyond the gravel pack process. SAND CONTROL SOLUTIONS: Expandable sand screen alternative to fracture- packing sand control. The techniques applied to control downhole sand production have not changed for many years. Almost every sand control solution involves the installation of a pipe- based filter that is either gravel packed or left as a . Gravel packing has evolved over more than 7. Stand- alone screens, while being operationally very simple, do not support the formation, leading to a number of well reliability and production issues. Expandable sand screens were developed to overcome the shortcomings of both existing techniques, while also providing some unique benefits. The first commercial application of this technology took place in January 1. Since then, their use has spread quickly to all parts of the world and in many diverse applications. As of November 2. US acceptance was slower in coming. There are two main types of sand. In Choosing a filter size it is important to know what type of sand is causing the problem. Water well screen consists of a full range of sand control screens including slotted liner, wire wrapped screen, pre-packed screen, perforated casing and bridge slot. Distribute flow evenly and reduce plugging Our premium sintered mesh screens have a single layer or multiple layers of woven wire mesh, sometimes sintered, forming a. Sand and Gravel Screens, Aggregate Screening Specifications. Sand, Gravel, Aggregate and mining screens are woven of abrasion resistant material and provided with. In weak, unconsolidated formations, unsupported barefoot completions usually aren’t an option. An expandable sand screen (ESS) is a compliant sand-control solution. Rotary Sand Screen 100 Read more; Rotary Sand Screen 150 Read more; Rotary Sand Screen 200 Read more; Rotary Sand Screen 250 Read more. Halliburton’s premium sand control screens increase the productive life of producer wellbores through effective sand control. Our unique technology gives precise. The industry’s most sand control experience and a broad array of the highest-performance sand control screens extend well life and reduce intervention cost. Not until 2. 00. 0 did Chevron complete a sidetrack well, using expandable sand screens for sand control, making it the first in the Gulf of Mexico. The West Delta 1. Field was discovered in 1. The pay sands are stacked deltaic deposits from 4,9. Pleistocene to late Miocene. Sand control is installed in most wells in the field to address historical sand control problems. In May 2. 00. 0, the OCS- G 9. G- 7 S/T1 well was drilled as an extended reach well to a seismic bright spot in the B- 1 sand at 4,8. TVD). One other take point in the B- 1 sand had successfully produced gas in a separate fault block with a high rate water- pack installed for sand control. The G- 7 S/T1 well logged 1. Initial appraisal indicated that completing this well with conventional gravel pack would not generate the best economic solution and that a completion with stand- alone screens would not be sufficiently durable to assure a producing life with adequate longevity. An expandable sand screen offered the ability to control sand production without a frac- pack, but also promised to overcome the plugging and erosion problems of stand- alone screens. Further, the elimination of the frac- pack brought the project into economic reality by lowering the initial cost as well as reducing the risk of early water production compromising gas production. The development of the expandable sand screen was created by cutting base- pipe in an overlapping engineered slot pattern around its circumference. The pipe can then be expanded by various means, most simply by driving a swedging mandrel through its bore. The slotted tube has several desirable features as the base- pipe for an expandable screen: Upon expansion, its diameter can be increased by over 1. It provides a large inflow area when expanded (typically greater than 3. The expanded base pipe internal diameter is larger than the swedging mandrel diameter. This surplus expansion phenomenon allows the mandrel to travel freely, but more importantly, allows the expandable screen to achieve a tight fit inside a confining wellbore, thus providing for wellbore support. Expandable pipe. The expandable base pipe is covered longitudinally with overlapping sheets of woven wire mesh as the filter medium. Tests with these filters showed that careful selection of aperture size for a given sand mixture enabled plugging to be minimized with virtually all sand being held back. The filter media is sandwiched between the base pipe and an outer expandable protective shroud. A key component of the system is an expandable sand tight connector, which allows the entire screen assembly to be expanded to the same dimensions while allowing flow through it. As the sand screen is expanded, it eliminates the annulus between the screen and the borehole. This feature has further benefits: Eliminating the screen/wellbore annulus effectively permits smaller diameter sandface completions for the same production bore size. Reducing the final bore size can lead to cost reductions of up to 2. When an expandable screen is expanded to fit tightly in a wellbore, the ability to manage the reservoir inflow or treat the reservoir is greatly increased. With the annulus eliminated, it is possible to set devices within the screen to isolate sections or to squeeze treatment fluids into the formation and there is a dramatic reduction in the ability of sand particles to move around under producing conditions. In theory, sand particles are rapidly stabilized, resulting in reduced erosion and screen plugging. A further fundamental benefit of expanding the screen to the wellbore diameter is the dramatic increase in available filter area. In all studies, increasing filter area has been shown to be the best means of resisting plugging. Well productivity. Formation productivity was to be maximized by minimizing water production and eliminating sand production. Earlier experience with the weakly consolidated formation indicated that a conventional frac- pack could extend fractures in this clean blocky sand from the gas producing intervals down into the zone with strong water production. Attention was required to ensure that the interface between the formation and the expandable sand screen (perforation tunnels) would maintain an adequate permeability. Perforation debris in tunnels will compromise their productivity whether the tunnels are pre- packed or not. The removal of this debris through under- balanced surging was the initial step to ensure the integrity of the tunnel permeability. Conventional practice is then to pre- pack perforation tunnels to preserve or improve permeability at the formation/wellbore interface. Expandable sand screen deployment does not allow for this to be done. But it is clear however that if the perforation tunnels collapse and formation fines are liberated en masse, the permeability of the tunnels and the screens will be irreparably impaired. This is most likely for poorly sorted sands, but for well- sorted sands, a managed ramp up of production allows the tunnels to pack themselves with formation sand against a properly sized expandable sand screen while allowing fines to pass through the screens. The resulting permeability of the tunnels is not dissimilar to that of the formation itself. The well was to be perforated with filtered seawater in the wellbore, after which some fluid loss to the formation was to be expected. To control this, a sheared and filtered pill was spotted across perforations. This should effectively control the fluid loss during completion string installation and could be flowed back through the expandable sand screen without any acid being needed as a breaker. The choice of perforation charges was between a deep penetrating charge to bypass any formation damage that may have occurred while sidetracking the well (otherwise usually performed by the frac- pack), and big hole charges to provide the maximum inflow area. One of the advantages of the expanded screen is the generous inflow. This brings low inflow velocities and pressure drops across the screen. In turn, this reduces screen erosion, but more importantly, limits the transportation of formation sand and fines from the formation along the perforation tunnels. Therefore, to take advantage of the inflow area of the screen and to minimize the transport of plugging fines along the perforation tunnels, big hole charges were selected with a shot density of 1. The perforations were to be shot underbalanced to remove perforation debris Screen selection. The interval selected for perforation was chosen to minimize the potential for water coning, but was also constrained by the length of available screen units. The screen in question was a single joint unit, which had been procured for a different well, and had an effective length of 3. The perforation interval was therefore limited to 3. Expandable sand screen units had been procured for another Chevron well that proved to have mechanical impediments to re- completion, and so were available for the G- 7 re- drill, if the specifications proved to be appropriate. The unexpanded base pipe size (4- 1/2 in.) was correct for the 7 in. G- 7 S/T1, and the range of expansion cones on hand allowed for some flexibility for the engineers on location if the drift run proved an ID less than API 5. CT specification. Based on an evaluation of the formation particle size distribution by Chevron, the filter medium with 1. A single integral expandable sand screen joint combining a standard expandable sand screen joint with integral expandable top and bottom connectors was made up with a bull plug at the bottom end. The expandable top connector containing the expansion cone was made up to the seal bore extension and thus to the packer. Expansion of screen. Screen expansion is achieved by driving a hardened expansion cone through the unexpanded base pipe. The base pipe ID expands slightly more than the OD of the expansion cone. The expansion cone selection is done immediately prior to running the screen to capture all the available information regarding the wellbore. In this situation, the API 5. CT ID and the API 5. CT drift ID of the G- 7 S/T1 casing each straddled two expansion cones sizes. An expansion cone selection too large could prevent expansion of the expandable sand screen completely or prevent it being accomplished with the string weight available on the rig. An expansion cone too small, would leave the screen expanded but not tight against the liner, introducing a micro- annulus between the screen and the liner, undermining the creation of an effective packing of perforation tunnel by allowing produced sand to be continually leached from the tunnel. It was hoped that a bit and scraper/drift run would clarify the decision process, but this was not deemed an efficient use of rig time. So the expandable sand screen engineer made some unproven assumptions on the quality of the casing tubulars, and aimed for the maximum possible expansion consistent with the API 5. CT ID of the casing.
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