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: a tool set temporarily in the casing or well to prevent the passage of cement, thereby forcing it to follow another designated path. It is used in squeeze cementing and other remedial cementing jobs.

n: A kind of tool for cement squeezing or remedying cementing job. Set into the casing or wellbore temporarily to stop cement slurry downflowing.

a temporary set plug to allow cement work above the tool. It is drilled out after the cement job.

n: the application of a liquid slurry of cement and water to various points inside or outside the casing. See primary cementing, secondary cementing. squeeze cementing. cementing barge n: a barge containing the cementing pumps and other equipment needed for oilwell cementing in water operations.

v: To prepare and pump cement into place in a wellbore. Cementing operations may be undertaken to seal the annulus after a casing string has been run, to seal a lost circulation zone, to set a plug in an existing well from which to push off with directional

n: a variation of squeeze cementing for wells with two producing zones in which (1) the upper fluid sand is perforated;(2) tubing is run with a packer, and the packer is set between the two perforated intervals;(3) water is circulated between the two zones to remove as much mud as possible from the channel;(4) cement is pumped through the channel and circulated;(5) the packer is released and picked up above the upper perforation, a low squeeze pressure is applied, and the excess cement is circulated out. The process is applicable where there is communication behind the pipe between the two producing zones because of channelling of the primary cement or where there is essentially no cement in the annulus.

a secondary or repair cement method using upper and lower perforations and a packer set between. Circulation is established with water and mud remover chemicals to clean the channel. Cement is circulated with a set volume pumped, then the packer is releas

n: squeeze cementing tools made of the drillable materials such as cast iron,aluminum alloys and plastic material and so on

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.

n: the forcing of cement slurry into a well at the point to be sealed with a final pressure equal to or greater than the formation breakdown pressure. See squeeze cementing.

n: fracture the formation with pressure and inject cement into formation untill the formation pressure keeps at certain specially designated value

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

n: 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 squeezecemented. By setting packers, the squeeze point is isolated from the rest of the well. See packer;squeeze cementing.

n: firstly plug back and set down the packer at the section of cement, then lower the packer through pipe and set down on the section of cement, seperates the section of cement from other section, finally squeeze the cement to predetermined spot through the

n: a secondarycementing operation in which a plug of cement is positioned at a specific point in the well and allowed to set. Compare squeeze cementing.