Page 6 - A Primer of Oilwell Service and Workover Completion
P. 6
. Power tongs use a hydraulic . Various types of mills . Squeezing cement through
Petroleum Extension-The University of Texas at Austin
motor. remove metal, cement, perforations next to an
. The crew stores tubing sand, or scale. upper producing zone that
joints on racks near the . Internal cutters grip and has been depleted.
mast. cut a hollow fish from the . Bradenhead squeeze
. Sucker rods hang on a rod inside. . Packer squeeze
hanger in the mast. . External cutters cut a fish . Corrugated liner patch
. A ram blowout preventer from the outside. . Casing roller
. An annular blowout . A jet cutter uses a disk-shaped . Casing swage
preventer uses a rubber seal charge inside a hollow fish. . Sidetracking drills around
to fit any size pipe. . A jet cut flares the end of a fish that cannot be
the fish. removed or other unrepair-
. A chemical cutter blasts able damage.
. Conventional electric log acid onto the fish to cut it. . Horizontal drilling allows
. Abrasion has damaged this . Bumper jar production from vertical
coupling. . A hydraulic jar reservoirs next to each
. Overtightened pin and . A string-shot assembly other.
coupling . To sidetrack, the crew drills
. A casing scraper a window in the casing.
. Swabbing works like a . Macaroni tubing fits inside . Whipstock
syringe to lower pressure the production tubing to . In reverse circulation, the
in the wellbore. wash sand out. mud is pumped down the
. Swabs . Coiled tubing washes sand annulus and up the
. Swab cups are made of up the annulus between pro- tubing.
or lined with natural or duction tubing and
synthetic rubber. coiled tubing.
. The lubricator and oil . Sand is washed up the . Several powerful, truck-
saver tubing when fluid is mounted pumps are
pumped down the casing- arranged at the well site
tubing annulus. for a fracturing job.
. Drill pipe stuck in a . A washover pipe mills out . High fluid loss creates
keyseat packed sand around the shorter fractures.
. A spear tubing. . Proppants hold the fracture
. An overshot . Chemical consolidation open (A), but if they are
. A taper tap forms screw . A resin-coated sand harder than the rock, they
threads inside a hollow pack embed in it and the fracture
fish. . Plug-back cementing closes (B).
. A die collar forms screw . Placing a plug using . The crew can place a packer
threads on the outside of tubing above the area to be fractured,
a fish. . Placing a plug using a set packers both above and
. A washpipe with a rotary dump bailer below the area, or fracture
shoe on the bottom . Squeeze cementing with no packers.
