دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a technique in squeeze cementing in which (1) the zone below the producing interval is perforated and a high pressure squeeze carried out;(2) the zone the producing interval is perforated and squeezed off in a similar manner;(3) the hole is drilled out;and (4) the producing interval is perforated. The purpose of block squeezing is to isolate the producing interval and prevent communication with the sand immediately above and below the producing interval.

a cement squeeze into a area of perforations. Often done initially over the frac pressure.

n: See cementing under pressure.

n: a retrievable cement squeeze tool that is used in remedial cementing. See remedial cementing;secondary cementing.

n: a method of squeeze cementing in which cement is pumped in and the pumps are stopped for a few minutes. Pumping is started and stopped until the desired pressure is obtained.

a cement squeeze technique where the cement is squeezed into a channel or leak at a low rate, then allowed to sit and dehydrate by leakoff, before again raising the pressure. The action gradually builds a dehydrated cement node that blocks the channel.

a cement squeeze technique with a final squeeze pressure below the formation fracturing pressure.

n: a piece of downhole equipment that consists of a sealing device, a holding or setting device. and an inside passage for fluids. It is used to block the flow of fluids through the annular space between pipe and the wall of the wellbore by sealing off the space between them. In production, it is usually made up in the tubing string some distance above the producing zone. A packing element expands to prevent fluid flow except through the packer and tubing. Packers are classified according to configuration, use, and method of setting and whether or not they are retrievable (that is, whether they can be removed when necessary, or whether they must be milled or drilled out and thus destroyed).

n: a downhole tool, run on drill pipe, tubing or casing, which can be used extensively in drill stem tests, cement squeezes and complections.

a device that forms a seal between two chambers of the well. Packers may be equipped with slips that anchors the packer and stops movement under high pressure.

a cement squeeze that injects cement until a resistance is built.

n: a squeeze cement job with open perfs above the packer.

a cement squeeze involving injecting into a lower perforation, separated by a packer from an upper perforation while trying to fill a channel.

a cement squeeze under the fracture pressure, trying to build pressure slowly. Typical in fracture sealing.