| 摘要 |
<p>Apparatus for cementing a casing string in a slant well includes a slant drilling rig (16) including a slanted mast (22) having a pair of spaced rails (24,26) with an elevator (28) spanning between the rails and reciprocable along a length thereof for reciprocating a casing string (12) with the casing string lying generally between and parallel to the rails. The mast has an open generally upward facing side (34). A cement plug container apparatus (30) has a cementing manifold (42) and a release plunger assembly (64) attached thereto and positioned about the container relative to each other such than an angle of substantially less than 180 DEG , and most preferably approximately 90 DEG , is defined therebetween. Thus, the container is substantially free of any radial protrusions outside that angle and can lie generally flat within the confines of the space between the rails of the tilted mast. The container is of a lift through design having a lifting sub attached to the upper end thereof so that the container and a casing string supported therefrom can be reciprocated within the slant rig so as to reciprocate the casing string while cementing the same in place. <IMAGE></p> |
