دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

v. to place a packer in the wellbore and activate it so that it forms a seal between the tubing and the casing.

n: fixed the packer in the holebore, that makes up the separator between the oil tube and casing.

n: a BHA (q.v.) that is designed to maintain inclination and direction of the wellbore.

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 collection of materials including cutting and/or fill that dehydrates or is held by pressure and stops to circulation of fluid in a wellbore.

n: I. a device on a logging tool that contacts the wellbore when the log is being taken. 2. fluid placed in a well to serve a special purpose. 3. a concrete foundation on which a drilling rig rests.

a volume of fluid, without proppant, injected in front of a frac job to establish frac width.

n: see paraffin. paraffin inhibitor n: a chemical that, when injected into the wellbore, prevents or minimises paraffin deposition.

n pl: sucker rods that have been broken and separated in a pumping well because of corrosion, improper loading, damaged rods, and so forth. partial immersion thermometer n: a thermometer with a specific length of the bulb and stem immersed the liquid and the scale above the surface for ease of reading.

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.

v: to perforate the well with a column of fluid in the well bore, which exerts less pressure on bottom than the formation does, to cause formation fluids to flow into the wellbore immediately after the casing is perforated. The method is also called reverse-pressure perforating. Its purpose is to force debris in the perforation to flow into the wellbore and not restrict flow within the perforation.

n: 1. a well completion method in which the producing zone or zones are cased through, cemented, and perforated to allow fluid flow into the wellbore. 2. a well completed by this method.

n: the completion method that formes oil flow channel through shooting the production casing and liner.

a completion where the well is cased and cemented and then perforated in the zone of interest.