# US 8,739,891 B2 · Stroker device

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- Number: US 8,739,891 B2
- Document ID: US8739891B2
- Status: Granted
- Kind: B2
- Application number: 13/264,088
- Filed: 2010-04-19
- Published: 2012-02-16
- Granted: 2014-06-03
- Earliest claimed: 2009-04-22
- Assignees: Aker Well Service AS
- Applicants: Karl Einar Ferkingstad; Arne Motland; Rune Bjørndal
- Inventors: Karl Einar Ferkingstad; Arne Motland; Rune Bjørndal
- Web page: https://patentgrep.com/patent/US8739891B2

## CPC

- E21B 23/0411: {specially adapted for anchoring tools or the like to the borehole wall or to well tube}
- E21B 4/18: Anchoring or feeding in the borehole
- E21B 23/001: {Self-propelling systems or apparatus, e.g. for moving tools within the horizontal portion of a borehole}
- E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS

## Abstract

A stroker device for use in a borehole in the ground includes an actuator arranged for displacing a tool in a longitudinal direction of the borehole, and grippers arranged to anchor the stroker to the wall of the borehole, alternatively to a pipe wall, wherein the stroker is provided with driving wheels or driving belts for propulsion.

## Claims

### Claim 1

A stroker device for use in a borehole located in the ground, said stroker device comprising:
an actuator having a actuator being arranged to displace a tool in a longitudinal direction of the borehole;
a gripper module with grippers being forced to a wall of the borehole or pipe wall to prevent displacement of the stroker device;
a propulsive module having a first and a second set of driving wheels being mutually rotated approximately 90 degrees about the longitudinal axis of the stroker device for driving the stroker device to an operation location;
a hydraulic module for commonly supplying hydraulic pressure fluid to the actuator, the grippers and the propulsive module;
a control module for commonly controlling at least the grippers and the propulsive module simultaneously; and
a power module for commonly supplying power to at least the grippers and the propulsive module.

### Claim 2 (depends on 1)

The stroker device according to claim 1 wherein displacement of the stroker device to the work location does not require connecting a wireline tractor to the stroker device.