A remedial cementing operation designed to force cement into leak paths in wellbore tubulars. the required squeeze pressure is achieved by carefully controlling pump pressure. squeeze cementing operations may be performed to repair poor primary cement jobs, isolate perforations or repair damaged casing or liner.

A special tool with a rubber packer or lead seal that is used to repair casing. when casing is damaged downhole, a cut is made below the damaged casing, the damaged casing and the casing above it are pulled from the well, and the damaged casing is removed from the casing string. the tool is [...]

A tool used to straighten damaged or collapsed casing in a well.

Perforations in casing for the inflow of hydrocarbons and gas

A device employed with a packer to surge, or clean, open perforations; also called surge disk.

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.

The uncased portion of a well. all wells, at least when first drilled, have openhole sections that the well planner must contend with. prior to running casing, the well planner must consider how the drilled rock will react to drilling fluids, pressures and mechanical actions over time. the strength of the formation must also be [...]

The theoretical maximum flow that a well could deliver with a zero backpressure at the middle of the perforations.

A cementing repair technique involving injecting cementing under pressure to fill channels in the primary cementing treatment.

A smaller well. thought to be cheaper to drill, but much more expensive to repair or workover and often limited on fluid flow rate potential.

Removing fluid from the tubing in a well, often by means of a swab, to lower the bottomhole pressure in the wellbore at the perforations and induce the well to flow.

Any equipment designed to be pumped down a completed well to effect a repair, modify the well’s flow, or for other reasons.

1. the area of the formation that is damaged because of the invasion of foreign substances into the exposed section of the formation adjacent to the wellbore during drilling and completion.
2. the pressure drop from the outer limits of drainage to the wellbore caused by the relatively thin veneer (or skin) of the affected [...]

A cylindrical or spherical vessel used to isolate the components in mixed streams of fluids. see oil and gas separator.

A screen joint placed opposite perforations in sand control