دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

an older perforating method where hardened steel bullets were fired from short barrels and designed to penetrate the casing, cement and formation.

n: a tubular device that, when lowered to a selected depth within a well, fires bullets through the casing to provide holes through which the formation fluids may enter the wellbore.

n: A kind of tubing device, tripped in to the predetermined depth, ejecting bullet and breaking through cement stone and casing to form a passage of oil and gas.

n pI: the devices loaded into perforating guns to penetrate casing and cement and for some distance into the formation when the guns are fired. See gunperforate.

v: to create holes in casing and cement set through a productive formation. A common method of completing a well is to set casing through the oil-bearing formation and cement it. A perforating gun is then lowered into the hole and fired to detonate high-powered jets or shoot steel projectiles (bullets) through the casing and cement and into the pay zone. The formation fluids flow out of the reservoir through the perforations and into the wellbore. See jetperforate, perforating gun.

n: a perforating gun consisting of a hollow, cylindrical metal tube into which are loaded shaped charges or bullets. On detonation, debris caused by the exploding charges falls into the carrier to be retrieved with the reusable gun.

n: a kind of Shaped - perforating guns

v: to pierce the casing wall and cement of a wellbore to provide holes through which formation fluids may enter or to provide holes in the casing so that materials may be introduced into the annulus between the casing and the wall of the borehole. Perforating is accomplished by lowering into the well a perforating gun, or perforator, which fires electrically detonated bullets or shaped charges. See bullet perforator;jet-perforate, perforating gun.

n: to pierce the casing wall and cement,allowing formation fluids to enter the wellbore and flow to surface. This is a critical stage in the completion of a well. Perforating may also be carried out during workover operations.

n: a device fitted with shaped charges or bullets that is lowered to the de- sired depth in a well and fired to create penetrating holes in casing, cement, and formation.

n: see gun perforator.

a carrier for shaped charge explosives that punches holes through the casing and cement and into the formation. Guns may be run on wireline or tubing.