Two packers separated by a spacer of variable length. a straddle packer may be used to isolate sections of open hole to be treated or tested or to isolate certain areas of perforated casing from the rest of the perforated section.

A liquid, usually salt water or oil, but sometimes mud, used in a well when a packer is between the tubing and the casing. packer fluid must be heavy enough to shut off the pressure of the formation being produced, must not stiffen or settle out of suspension over long periods of time, and must [...]

A packer used for the well completion method of gravel packing.

A permanent packer, drillable in nature, capable of withstanding extreme working pressures, for remedial work. it has a positive flow-control valve built in.

A drillable service packer, a retainer.

A heavy-mandrel service squeeze tool with on-off tool used in drilling operations during storm interruptions.

A packer assembly that can be removed from the wellbore only by drilling or milling. drillable packers, and similar tools such as bridge plugs, are typically made from cast iron, aluminum, plastic or similar brittle materials.

Isolating a cement injection site between a packer and a plug prior to squeezing.

A special-purpose packer placed in the casing to permit a sidetrack operation.

Any packer designed to make a seal between the tubing and the casing during production

A piece of downhole equipment, consisting of a sealing device, a holding or setting device, and an inside passage for fluids, used to block the flow of fluids through the annular space between the tubing and the wall of the wellbore by sealing off the space between them. it is usually made up in the [...]

A retrievable receptacle anchored into the top of a production packer to land a tubing seal assembly

A squeeze cementing method in which a packer is set to form a seal between the working string (the pipe down which cement is pumped) and the casing. another packer or a cement plug is set below the point to be squeeze-cemented. by setting packers, the squeeze point is isolated from the rest of the [...]

A type of packer used for open-hole work, with inflatable packing elements

A packer equipped with friction blocks or drag springs and slips and designed so that rotation of the pipe unlatches the slips. the friction springs prevent the slips from turning with the pipe and assist in advancing the slips up a tapered sleeve to engage the wail of the outside pipe as weight is put [...]