Pressure-equalized wireline apparatus
AssigneeICON Instruments AS
InventorJan Erik Skjold
Life of this patent
Estimating the term…
Abstract
A wireline apparatus is for moving a tool into or out of a well. The apparatus is configured for forming a pressure vessel in combination with at least a portion of the well. The apparatus has: a first compartment for forming part of the pressure vessel; a hoisting means, the hoisting means being placed inside the first compartment; a wireline connected to the hoisting means; a second compartment arranged inside the first compartment; an electrical motor for driving the hoisting means, the electrical motor placed inside the second compartment; and a drive shaft for connecting the motor to the hoisting means, the drive shaft extending from the motor to the hoisting means through a wall separating the first compartment and second compartment. A method is for moving the tool in the well.
Claims14
A wireline apparatus for moving a tool into or out of a well, the apparatus being configured for forming a pressure vessel in combination with at least a portion of the well, the apparatus comprising:
- a first compartment for forming part of the pressure vessel;
- a hoisting means, the hoisting means being placed inside the first compartment;
- a wireline connected to the hoisting means;
- a second compartment arranged inside the first compartment;
- an electrical motor for driving the hoisting means, the electrical motor placed inside the second compartment;
- and
- a drive shaft for connecting the motor to the hoisting means, the drive shaft extending from the motor to the hoisting means through a wall separating the first compartment and second compartment.
A method of moving a tool in a well, the method comprising the steps of:
- providing an apparatus comprising a first compartment comprising a wireline and a hoisting means, and a second compartment comprising a motor, the second compartment being arranged inside the first compartment, and the motor and the wireline being connected to the hoisting means;
- connecting the apparatus to the well;
- connecting the tool to the hoisting means by use of the wireline;
- opening one or more valves to fluidly connect the apparatus to the well, so that the apparatus and at least a portion of the well in combination forms a pressure vessel;
- and
- moving the tool by feeding out or pulling in wireline by use of the hoisting means.
Dependencies are inferred from the claim text.