| LACT |
"Lease
Automatic Custody Transfer", possible where measuring equipment installed at the
point of transfer from lease to pipeline is so completely automated as not to require any
manual activity or witnesses. |
| lay barge |
a
barge used in the construction and placement of underwater pipelines. Joints of pipe
are welded together and then lowered off the stern of the barge as it moves ahead. |
| lazy board |
see jack board. |
| lease condensate |
a
natural gas liquid recovered from gas well gas (associated and non-associated) in lease
separators of field facilities. |
| lease separator |
a
facility located at the surface for the purpose of: (1)
separating casinghead gas from produced crude oil and water at the temperature and
pressure conditions of the separator; and
(2) separating gas from that portion of associated and
non-associated gas which liquefies at temperature and pressure conditions of the
separator. |
| live oil |
oil
that contains gas. |
| load binder |
chain
or rope used to tie down loads of equipment, or the "boomer" used to tighten the
chains. |
| location |
the
place at which a well is to be or has been drilled. |
| log |
a
systematic recording of data, such as a a driller's log, mud log, electrical well log, or
radioactivity log. Many different logs are run in wells to obtain various
characteristics of downhole formations. |
| lost
circulation additives |
materials added to the mud in varying amounts
to control or prevent lost circulation. Classified as fiber, flake, or granular. |
| lost
circulation material (LCM) |
a substance added to cement slurries or
drilling mud to prevent the loss of cement or mud to the formation. See bridging
materials. |
| lost returns |
see lost circulation. lower kelly cock n: see
drill stem safety valve |
| lower kelly valve |
an essentially full-opening valve installed
immediately below the kelly, with outside diameter equal to the tool joint outside
diameter. |
| low-solids fluid |
see low-solids
mud |
| low-solids mud |
a drilling mud that contains a minimum amount
of solid material (sand, silt, and so on) and that is used in rotary drilling when
possible because it can provide fast drilling rates. |
| low-yield clay |
commercial clay chiefly of the calcium
montmorillonite type and having a yield of approximately 15 barrels per ton. |
| LPG |
liquefied petroleum gas |
| lubricate |
1. to apply grease or oil to moving parts 2. to lower or raise tools in or out of a well with pressure inside
the well. The term comes from the fact that a lubricant (grease) is often used to
provide a seal against well pressure while allowing wireline to move in or out of the
well. |
| lubricator stack |
a surface device used in slickline operations
to keep the line lubricated and provide grease for pressure control |
| lyophilic |
having an affinity for the suspending medium,
such as bentonite in water. |
| lyohilic colloid |
a colloid that is not easily precipitated from
a solution and is readily dispersible after the precipitation by an addition of the
solvent. |
| lyphobic colloid |
a colloid that is readily precipitated from a
solution and cannot be redispersed by an addition of the solution. |
| lost circulation additives |
materials added to the mud in varying amounts
to control or prevent lost circulation. Classified as fiber, flake, or granular. |
| lost circulation material (LCM) |
a substance added to cement slurries or
drilling mud to prevent the loss of cement or mud to the formation. See bridging
materials. |
| lost returns |
see lost circulation. lower kelly cock n: see
drill stem safety valve |
| lower kelly valve |
an essentially full-opening valve installed
immediately below the kelly, with outside diameter equal to the tool joint outside
diameter. |
| low-solids fluid |
see low-solids mud |
| low-solids mud |
a drilling mud that contains a minimum amount
of solid material (sand, silt, and so on) and that is used in rotary drilling when
possible because it can provide fast drilling rates. |
| low-yield clay |
commercial clay chiefly of the calcium
montmorillonite type and having a yield of approximately 15 barrels per ton. |
| LPG |
liquefied petroleum gas |
| lubricate |
1. to apply grease or oil to moving parts 2. to lower or raise tools in or out of a well with pressure inside
the well. The term comes from the fact that a lubricant (grease) is often used to
provide a seal against well pressure while allowing wireline to move in or out of the
well. |
| lubricator stack |
a surface device used in slickline operations
to keep the line lubricated and provide grease for pressure control |
| lyophilic |
having an affinity for the suspending medium,
such as bentonite in water. |
| lyohilic colloid |
a colloid that is not easily precipitated from
a solution and is readily dispersible after the precipitation by an addition of the
solvent. |
