System and method for monitoring and controlling snubbing slips

a technology of snubbing slips and monitoring systems, applied in the direction of drilling casings, drilling pipes, surveying, etc., can solve the problems of operator releasing, affecting equipment, and putting personnel at risk

Inactive Publication Date: 2015-06-18
SNUBCO MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0021]In one embodiment of the method, at least step (d) is automated to prevent complete release of the first slips without confirmation that the second slips have adequately engaged the pipe. The term “automated” means that a system, without any operator intervention, prevents release of the stationary slips, without the necessary confirmation.

Problems solved by technology

However, it is not uncommon for an operator to release one set of load bearing components accidentally, before transferring the load to the other set of load bearing components.
Such an error may result in the pipe string being dropped or ejected, placing personnel at risk and damaging equipment.

Method used

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  • System and method for monitoring and controlling snubbing slips
  • System and method for monitoring and controlling snubbing slips
  • System and method for monitoring and controlling snubbing slips

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Embodiment Construction

[0029]The present invention is directed to a system and method for monitoring and controlling engagement and load transfer of load bearing components in well intervention, completion, drilling, and workover equipment. When describing the present invention, all terms not defined herein have their common art-recognized meanings. To the extent that the following description is of a specific embodiment or a particular use of the invention, it is intended to be illustrative only, and not limiting of the claimed invention. The following description is intended to cover all alternatives, modifications and equivalents that are included in the spirit and scope of the invention, as defined in the appended claims.

[0030]One embodiment of the invention is described in the context of control of hydraulic snubbing units. As used herein, the term “hydraulic snubbing unit” means a hydraulically actuated unit including slips, a blowout preventer stack, and hydraulic jacks for inserting or pulling pip...

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Abstract

A system and method for monitoring and controlling a snubbing unit having traveling slips and stationary slips are provided. Position sensors are associated with the slips for directly or indirectly detecting opened and closed positions of the slips, including detecting a rotational position of a crankshaft that drives the slips into engagement with a pipe. Load sensors are associated with the slips for detecting load status of the slips. A control system receives input signals from the sensors, and confirms that either the traveling slips or the stationary slips are loaded before releasing or allowing the release the opposing set of slips, when transferring the pipe string load from the one set of slips to the other set of slips.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]This application is a continuation-in-part of U.S. patent application Ser. No. 13 / 462,446 filed on May 2, 2012 entitled “System and Method for Monitoring and Controlling Snubbing Slips”, the contents of which are incorporated herein by reference.FIELD OF THE INVENTION[0002]The present invention relates to a system and method for monitoring and controlling engagement and load transfer of load bearing components in well intervention, completion, drilling, and workover equipment, and snubbing units in particular.BACKGROUND OF THE INVENTION[0003]Well intervention, completion and drilling equipment are used to feed pipe into and out of subterranean wells. As an example, snubbing units are known in the oil and gas industry for facilitating access to a well which is under pressure. A snubbing unit manipulates various tubular components such as pipe, tubing, and bottomhole assemblies into and out of a well while controlling the well under pressur...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): E21B47/00E21B19/07E21B19/10
CPCE21B47/00E21B19/07E21B19/10E21B44/00E21B19/16
Inventor TASKINEN, JOHNLEBLANC, TROYMCKINNON, SHAWNTHORNELL, LANCE
Owner SNUBCO MFG
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