Wireline hydraulic retrieving tool

Patent · Tue Jul 20 04:00:00 EDT 1993

OSTI ID:6126314

Obrejanu, M; Weiler, D H

A wireline retrieval tool is described for retrieving objects stuck in the interior of a tubing string in a well bore comprising an assembly adapted to be connected to and lowered on a wireline through the interior of a tubing string, the assembling comprising: (a) upper connecting means for connecting the assembly to the wireline; (b) lower connecting means for engaging a wireline pulling tool adapted to engage the object; (c) a fluid motor powered by pressurized fluid supplied by a hydraulic pump driven by an electric motor; (d) an electrical subsystem for supplying electricity; (e) an axially extending mandrel attached to the power subassembly and to the lower connector means; (f) a tubular housing surrounding the mandrel and axially slidable thereon; (g) anchoring means adapted to selectively anchor the tubular housing to the interior wall of the tubing string to prevent axial movement of the tubular housing in a direction opposite to the retrieval direction; (h) and wherein the fluid motor includes at least one variable volume pressure cylinder chamber and at least one variable volume reservoir chamber defined between the tubular housing and the mandrel, the hydraulic pump being adapted to deliver hydraulic fluid under pressure to expand the pressure cylinder chamber causing axial movement between the tubular housing and the mandrel, the mandrel being urged in the retrieval direction relative to the tubular housing upon expansion of the pressure cylinder, and the mandrel urging the lower connector means, pulling tool and object in a retrieval direction when the tubular housing is anchored against the interior wall of the tubular string; and (i) wherein the anchoring means comprises a plurality of circumferentially divided slips encircling the mandrel and resiliently urged towards the mandrel, the slip housing being held at least until said slips are anchored against the interior wall of the tubing string.

• Assignee: IMS; EDB-93-107617
• Patent Number(s): A; US 5228507
• Application Number: PPN: US 7-749176
• OSTI ID: 6126314
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
422000* -- Engineering-- Mining & Underground Engineering-- (1980-)
BOREHOLES
CAVITIES
DESIGN
ELECTRONIC EQUIPMENT
ENGINES
EQUIPMENT
FASTENERS
HYDRAULIC EQUIPMENT
MANAGEMENT
MATERIALS HANDLING EQUIPMENT
MATERIALS RECOVERY
MOTORS
OPERATION
POWER SUPPLIES
PROCESSING
TOOLS
WASTE MANAGEMENT
WASTE PROCESSING
WELLS