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ns --) -Asoh . Multichannel Tubing Seals & Packers A multilevel well that uses a continuous length of The CAT tubing can be sealed in place with sand and muihchannel tubing has the advantage over other bentonite layers in the usuai manner using a tremie pipe multilevels in that there are no joints This significantly or with the Solinst Mini Sand Bentonite Injector, Model reduces the cost of installing wells and at the same time 56IM if the application is in loose sands,direct burial increases the reliability of the system The CMT tubing can be used, allowing the sand to collapse around the is very simple and convenient to use, as it gives full tubing re-packed bentori tg seals are also available flexibility as to where monitoring zones are located,and which have bentonite pellets inside a plastic mesh, so one length of tubing can be used for a number of wed that they can be slipped onto the tubing and then installations It has a ridge down its entire length to clamped quickly in place prior to installation allow for easy identification of specific channels Ports and packers can be assembled onto the tubing in the field, immediately after drilling,to reduce open hole time and potential c-oss-contamination between zones Plan View of CMT Tubing W Pre-packed Bentonite Packer Double-Acting Packers RJbge Do ble-A iliiInflatable ' are ideal for use in situations where a CMT System is to be put inside an existing casing, or in a smooth rock borehole and when Port Irbet Holes removal of the system for decommissioning or reuse is important. • Double Acting Packers have a rubber gland on the inside as well as the outside Soto glands inflate and deflate at Polyethylene, r' the same time When a vacuum is applied to a packer, Hot Mest Seal the inner gland retracts and the packer slides easily into Foam Plug 3 r position on the CMT tubing Air vent Hole The vacuum is then released so that the packer grips onto the tubing and a clamp top and bottom ensures that the packer does not shift position during installation To create a port channel zs aealed holes are drilled Into the tuhmg and covered by a stainless steel screen or pre-packed sand pack . " POl"t5 ¢ r' The number and location of ports may be determined in n w advance of drilling, or after conng Holes are drilled in , a vertical line into a given channel at a specified depthae>" according to the zone to be monitored, forming a port r The channel is sealed with a polyethylene sealant below the pori:openings and a vent hole is left just below the seal to allow air to escape as the system is lowered into the hole Inflating the A stainless steel mesh is fixed in place over the port to Applying a Sliding the packer Doable-Acting prevent fines from entering, or pre-packed sand packs vacuum into position Packers are clamped onto the tubing over the holes The screen The packers are connected in line with flexible inflation kits come in a variety of mesh sues, complete with tubing, and after installation unto the well an inflation clamps, hot melt polyethylene glue and plugs vessel is filled with water and an air source is used to Each channel is sealed at the bottom to prevent cross hydraulically inflate the packers contamination, and a vent hole is cut into the channel Systems using Double Acting Packers can easily be just below the port This allows water from the removed and the packers used elsewhere or in some monitoring zone to fill the channel below the zone, cases the system may be repositioned so that the ports avoiding buoyancy are located at different depths within the same well 'Patents Pending High Quality Groundwater Monrtonng Instrumentation Sofinsf