دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

v: to treat oil-bearing limestone or other formations with acid for the purpose of increasing production. Hydrochloric or other acid is injected into the formation under pressure. The acid etches the rock, enlarging the pore spaces and passages through which the reservoir fluids flow. Acid also removes formation damage by dissolving material plugging the rock surrounding the wellbore. The acid is held under pressure for a period of time and then pumped out, after which the well is swabbed and put back into production. Chemical inhibitors combined with the acid prevent corrosion of the pipe. acid recovery plant n: plant for therecovery of sulfuric acid from acid sludge.

n pi: the tools or instrument, such as bailers and swabs, used to clean out an oilwell.

n: a device consisting of two reels on which wire rope is wound that provides two separate hoisting drums in the assembly. The main drum is used for pulling tubing or drill pipe;the second drum is used for coring and swabbing. See hoist.

n: A kind of hoisting tool composed by two cylinders on which the wire rope can reel

n: 1. a piece of cloth. rope. or nylon strand used to mart the wireline when swabbing or bailing. 2. an indicator of wind direction used during drilling or workover operations where hydrogen sulphide (sour) gas may be encountered. v:1. to signal or attract attention.2. in swabbing or bailing. to attach a piece of cloth to the wireline to enable the operator to estimate the position of the swab or bailer in the well.

n: the fibaric belt or rope binded on the cable during pumping or fishing


marking the pipe or wireline with a paint stripe.

a four-way connection. In a wellhead, a flow cross connects the master valve and the swab valve with two, normally horizontal, connections to the wing valves.

a three-way connection. In a wellhead, a flow cross connects the master valve and the swab valve with the wing valve.

n: a wireline sheave, or pulley, that is fastened to the ground anchor and that changes a horizontal pull on a wireline to a vertical pull (as in swabbing with a derrick over a well). See block.

n: wire rope idle wheel attached to anchorage block is use to change the horizontal pull of wire rope as vertical pull 。

n: an alignment clamp used on the inside of pipe. It uses a number of small expandable blocks, or shoes, to grip the inside surfaces of both pipe joints and hold them in place. The clamp can also act as a swab to clean the inside of the pipe. Compare external line- up clamp.

v: 1. to bring a well into production;used most often when gas is injected into a gas lift well to start production. 2. in workover operations, to swab a well to restore it to production. 3. to deviate a wellbore from the vertical, as in directional drilling.

n: a specially fabricated length of casing or tubing usually placed temporarily above a valve on top of the casing- head or tubing head. It is used to run swabbing or perforating tools into a producing well and provides a method for sealing off pressure and thus should be rated for highest anticipated pressure.

n: A long, high-pressure pipe fitted to the top of a wellhead or Christmas tree so that tools may be put into a high-pressure well. The top of the lubricator assembly includes a high-pressure grease-injection section and sealing elements. The lubricator is i

a pressurized shell, mounted above the BOP or master valve, which houses the tool string when entering a live well.