Abstract: A removable barrier is provided that prevents flow between an exterior of a mandrel and an interior of a mandrel. In one embodiment a dissolvable shroud surrounds the ports of the gas lift valve and temporarily prevents flow between the exterior of the gas lift valve and the interior of the mandrel. In an additional embodiment, a dissolvable plug may be placed within a portion of the gas lift valve or a portion of the lug in the mandrel to temporarily prevent flow between the exterior of the gas lift valve and the interior of the mandrel. In another embodiment, a dissolvable sleeve is placed within the mandrel to cover the port within the mandrel to temporarily prevent flow between the exterior of the gas the valve in the interior of the mandrel.

Abstract: A removable barrier is provided that prevents flow between an exterior of a mandrel and an interior of a mandrel. In one embodiment a dissolvable shroud surrounds the ports of the gas lift valve and temporarily prevents flow between the exterior of the gas lift valve and the interior of the mandrel. In an additional embodiment, a dissolvable plug may be placed within a portion of the gas lift valve or a portion of the lug in the mandrel to temporarily prevent flow between the exterior of the gas lift valve and the interior of the mandrel. In another embodiment, a dissolvable sleeve is placed within the mandrel to cover the port within the mandrel to temporarily prevent flow between the exterior of the gas the valve in the interior of the mandrel.

Abstract: In wellbore completions it is sometimes desirable to block fluid flow from lower in the well towards an upper portion of the well. In a current embodiment of the invention a plug may be placed within a wellbore and, once set, the plug prevents fluid flow past the plug. The plug includes a throughbore into which an object may be placed. The object may be solid and incorporate a shear device such as a shear pin so that in the presence of pressure from above the plug the object may be removed from the throughbore to allow fluid flow through the throughbore of the plug. In the alternative, pressure provided by fluid below the plug is not able to remove the object from the throughbore of the plug. In other embodiments the object within the throughbore of the plug may include a flapper valve to prevent fluid flow from below while allowing fluid flow from above. The flapper valve may also include a shear pin so that a certain amount of pressure is required to open the flapper valve to pressure from above.

Abstract: A delayed opening sliding sleeve system includes a first sleeve that prevents initiating the dissolution or erosion of a dissolvable or erodible retainer. The first sleeve is opened by a pressure cycle to expose or otherwise initiate the dissolution of a retainer. The retainer holds a second sleeve in place. The second sleeve is held closed against subsequent pressure cycles until such time as the retainer is dissolved or otherwise removed. With the retainer removed the second sleeve may be opened allowing fluid communication between the exterior and the interior of the sleeve system.

Abstract: In wellbore completions it is sometimes desirable to seal the wellbore against fluid flow or to anchor a component within the wellbore. However, running such a plug into the wellbore has been problematic on occasion such as when the nose of the plug encounters an object within the wellbore such as a sand bridge or other obstruction. In those instances, the way of the tubular pushing the plug into the wellbore combined with the nose of the plug being unable to pass the instruction causes the plug to prematurely set. Such an instance the plug may need to be drilled out in order to proceed. In the present embodiment the tubular used to move the plug into the well is attached to the nose of the plug so that the force provided to the plug by the tubular is transmitted only to the nose of the plug preventing the plug from presetting and allowing the plug to push past or through an obstacle within the wellbore.

Abstract: A removable barrier is provided that prevents flow between an exterior of a mandrel and an interior of a mandrel. In one embodiment a dissolvable shroud surrounds the ports of the gas lift valve and temporarily prevents flow between the exterior of the gas lift valve and the interior of the mandrel. In an additional embodiment, a dissolvable plug may be placed within a portion of the gas lift valve or a portion of the lug in the mandrel to temporarily prevent flow between the exterior of the gas lift valve and the interior of the mandrel. In another embodiment, a dissolvable sleeve is placed within the mandrel to cover the port within the mandrel to temporarily prevent flow between the exterior of the gas the valve in the interior of the mandrel.

Abstract: A delayed opening sliding sleeve system includes a first sleeve that prevents initiating the dissolution or erosion of a dissolvable or erodible retainer. The first sleeve is opened by a pressure cycle to expose or otherwise initiate the dissolution of a retainer. The retainer holds a second sleeve in place. The second sleeve is held closed against subsequent pressure cycles until such time as the retainer is dissolved or otherwise removed. With the retainer removed the second sleeve may be opened allowing fluid communication between the exterior and the interior of the sleeve system.

Abstract: In wellbore completions it is sometimes desirable to seal the wellbore against fluid flow or to anchor a component within the wellbore. However, running such a plug into the wellbore has been problematic on occasion such as when the nose of the plug encounters an object within the wellbore such as a sand bridge or other obstruction. In those instances, the way of the tubular pushing the plug into the wellbore combined with the nose of the plug being unable to pass the instruction causes the plug to prematurely set. Such an instance the plug may need to be drilled out in order to proceed. In the present embodiment the tubular used to move the plug into the well is attached to the nose of the plug so that the force provided to the plug by the tubular is transmitted only to the nose of the plug preventing the plug from presetting and allowing the plug to push past or through an obstacle within the wellbore.

Abstract: In wellbore completions it is desirable to cement or otherwise seal the casing to the wellbore. Many times such operations include sealing the interior of the casing against flow. In those instances a means to open the interior of the casing to fluid flow and thereby establish circulation in the well upon command is needed. Additionally it is desirable to be able to pressurize the well several times prior to establishing circulation. In an embodiment of the current invention an interior sleeve block fluid flow through ports in the housing. The inner sleeve is coupled to a j-slot so that a pressurization cycle will move the inner sleeve and cause the inner sleeve to rotate a predetermined distance. Upon reaching the access position in the j-slot the sleeve is allowed to move to a fully open position.

Abstract: In wellbore completions it is desirable to access multiple formation zones in a single well where the more formation zones that can be accessed tend to make the well increasingly economically viable. In an embodiment of the current invention a dart having a tapered or angled spline with a particular width on the darts exterior surface is pumped into a casing string having a number of devices Incorporated at strategic locations along the casing string. Each of the devices incorporated into the casing string have a slot as a part of the device. Each slot also has a particular width. As the dart passes through the devices incorporated in the casing string but towards the surface of the targeted device, the width of the tapered or angled spline is less than the minimum width of the slots in each of those upper devices. Therefore the dart does not engage or otherwise affect any of the upstream devices.

Abstract: In wellbore completions it is desirable to cement or otherwise seal the casing to the wellbore. Many times such operations include sealing the interior of the casing against flow. In those instances a means to open the interior of the casing to fluid flow and thereby establish circulation in the well upon command is needed. Additionally it is desirable to be able to pressurize the well several times prior to establishing circulation. In an embodiment of the current invention an interior sleeve block fluid flow through ports in the housing. The inner sleeve is coupled to a j-slot so that a pressurization cycle will move the inner sleeve and cause the inner sleeve to rotate a predetermined distance. Upon reaching the access position in the j-slot the sleeve is allowed to move to a fully open position.