| 主权项 |
1. Apparatus for injecting tubing from a structure located proximate to the surface of a body of water into a well extending into the earth below the water and sea floor, the apparatus comprising:
at least one surface injector associated with the structure, engaged with the tubing and positionable proximate to the surface of the water, said surface injector being adapted and arranged to control the movement of the tubing into and out of the underground well below the sea floor during normal operations; and at least one underwater injector engaged with the tubing, deliverable on the tubing from the structure to the well, releasably engageable with the well and being arranged and adapted to apply limited downwardly-directed pushing forces and limited upwardly-directed pulling forces to the tubing, said at least one underwater injector being arranged and adapted to be delivered on the tubing to the well without the use of one or more risers extending from the structure to the well, wherein at least one among said at least one surface injector and said at least one underwater injector is arranged and adapted to maintain the tubing in substantial tension between said at least one surface injector and said at least one underwater injector, |
