Bridge plugs are specialty plugging devices that can be set as temporary isolation tools to be retrieved (retrievable) at a later date or can be installed as permanent plugging and isolation tools (Drillable). They can be run on a wireline or pipes designed to be set in either casing or tubing. There are also models …
A packer is a tool used in oil and gas production well, which when set, seals the annular space between 2 strings of pipe or a string of pipe and the open hole. They also must have the capability of permitting production flow through them and onto the surface. As its major functions, a packer …
The variety of methods & procedures available for providing the setting mechanism for the seal elements of a packer leads to a significant number of options for installing and completing a well. Consider firstly therefore the setting methods for wells packers. Each of the possible methods for setting a packer is outlined below: Packer Setting …
A retrievable packer Can be defined as a subsurface tool that runs as a part of the completion string to provide a seal between the casing and tubing and can also be set and retrieved with wireline, mechanical or hydraulic mechanism. The major difference than other types of packers (permanent packers) is that they can …
Production packers are generally classified as either retrievable or permanent types. By definition, a retrievable packer is one that can be removed from a well by tubing manipulation or some other means not involving the destruction of the packer. But for removing the permanent packer, we shall work on milling or destroying it. That’s why …
A polished bore receptacle (PBR) is another class of wells packers category that can be utilized in place of a permanent packer. The PBR accepts an inner seal assembly that provides a seal off between the tubing and the PBR Figure (1) and (2). The Polished Bore Receptacle is generally employed in a casing liner …
Factors to be considered Well conditions. Compatibility with other downhole equipment. Customer preference. It must be recognized that oftentimes, several different types of packers may be successfully used in the same installation. Many times, a packer may be selected by the operator because he has experienced good success using it in the past. Economics. Economics …
Permanent packers as the name implies are well packers, when set, cannot be retrieved from the well. General characteristics common to permanent packers include: Permanently set. Once set, they cannot be released and retrieved from the well. A milling tool is required to remove a permanent packer from the well. The milling process will “mill …
