Wells – Above ground apparatus – With means facilitating connecting or disconnecting...
Reexamination Certificate
2001-05-21
2003-07-15
Bagnell, David (Department: 3679)
Wells
Above ground apparatus
With means facilitating connecting or disconnecting...
C166S077530, C175S052000, C175S085000, C414S022510, C414S022630
Reexamination Certificate
active
06591904
ABSTRACT:
DESCRIPTION
The present invention refers to an equipment for stowing and handling drill pipes. Generally speaking, a known type of equipment for stowing and handling drill pipes includes:
a device to take the drill pipes out from a well consisting of a drilling derrick, a power head that moves vertically along the tower itself in order to take one drill pipe at a time out from the well, and of a pantograph support located between the head and the tower, and adapted to allow the head to translate horizontally from and to the tower itself;
a manual device adapted to decouple the drill pipe that has been taken out, from a drill pipe which is still partially inside the well;
a feeding device for each drill pipe inside a service well placed at one side of the well;
a rack container located next to the service well and presenting a predetermined number of vertical bins intended to house the pipes; and
a transport device basically manually controlled intended to move the pipe from the service well to one of the bins of the container.
Notwithstanding the safety measures adopted in order to reduce errors, and in spite of all the automatic functions implemented in order to reduce the need for human interventions, the equipment of the type described above still presents a few drawbacks the effects of which are visible mainly in the case in which the wells to be drilled are very deep so that it is necessary to use a great number of drill pipes. In this case, in fact, the need for human intervention in order to decouple the two pipes and transfer them inside the container lengthens the time needed to take the pipes out so that, at the same time, the possibility for errors to occur becomes higher.
Besides, since each pipe is at least ten meters long, it is quite complicated to move them and highly skilled staff is needed to do it: it goes without saying that this affects the rapidity required to perform the manoeuvres.
It is an object of the present invention to provide an equipment for stowing and handling drill pipes, the equipment including:
extraction means to take each pipe in succession out from a well;
decoupling means to decouple the pipe taken out from a pipe which is still inside the well;
feeding means for each pipe inside a service well located at one side of the well;
a rack container located next to the service well and presenting a determined number of vertical bins intended to house the pipes; and
transport means to carry the pipe from the service well to the rack container;
the equipment being characterised in that said transport means include a central control tower located in front of said container and adapted to rotate around a vertical axis of rotation and a grip device supported by the central tower and movable together with, and in relationship to, the central tower itself from a working grip position at the well to a working release position at the one of the bins of the container.
REFERENCES:
patent: 4765401 (1988-08-01), Boyadjieff
patent: 5375667 (1994-12-01), Trevisani
patent: 5437527 (1995-08-01), McGill et al.
patent: 5647443 (1997-07-01), Broeder
patent: 198 37 692 (2000-03-01), None
patent: 0 886 033 (1998-12-01), None
patent: 0 978628 (2000-02-01), None
patent: 00/11305 (2000-03-01), None
Bagnell David
Collins Giovanna M
Soilmec S.p.A.
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