نمایش نتیجه 491 تا 500 از 581 نتیجه یافت شده برای lb:
v: to place a special mixture of clay and oil, or other materials, at a specific point in the wellbore. The size of the pill is usually several barrels. For example, a rig crew may spot a 20-barrel (3,180-litre) pill of bentonite clay and diesel oil at or near a formation into which drilling mud is escaping. By lowering the driI1 stem to the desired depth, the pill is slowly pumped down the stem and into the annulus. If all goes well, the pill will migrate into the formation taking the driI1ing mud and plug it closed.
n: A small volume or pill of fluid placed in a wellbore annulus to free differentially stuck pipe.
placing fluid at a specific place in the wellbore.
n: a downhole permanent, or drillable, packer that is set by lowering some of the weight of the tubing string onto the packer. The weight expands the packers sealing element to prevent flow between the tubing string and the casing below the packer. squeeze point n: the depth in a wellbore at which cement is to be squeezed.
a millable retainer for squeeze cementing.
n: a special retrievable packer set at a particular depth in the wellbore during a squeeze cementing job. See also squeeze cementing.
n: in perforating, the distance a jet or bullet must travel in the wellbore before encountering the wall of the hole.
n: The distance between the external surface of a logging tool and the borehole wall. This distance has an important effect on the response of some logging measurements, notably induction and neutron porosity logs.
the clearance from casing to the tool face.
n: pressure at the bottom of the wellbore when there is no flow of oil.
a downhole device that isolates a zone, a wellbore or a piece of equipment.
n: a hole that is drilled vertically. The total hole angle is restricted. and the hole does not change direction rapidly no more than 3 per 100 feet (30.48 metres) of hole.
n: Vertical wellbore.It can be think as straight hole when well deviation and azimuth not exceeding the provided limit.
an essentially straight hole with less than 5o total deviation from surface to bottom hole and dogleg severity less than 3o/100 ft.
n: 1. the process of lowering the drill stem into the wellbore when the well is shut in on a kick and when the weight of the drill stem is sufficient to overcome the force of well pressure. 2. the process of putting tubing into a well under pressure.
v: shutting in and stripping in when well blowout .
n: 1. the process of raising the drill stem out of the wellbore when the well is shut in on a kick. 2. the process of removing tubing from the well under pressure.