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SAND CONTROL SCREEN COMPRISING SPLIT COUPLING MEANS

IP.com Disclosure Number: IPCOM000244934D
Publication Date: 2016-Feb-02
Document File: 4 page(s) / 226K

Publishing Venue

The IP.com Prior Art Database

Related People

BP AMERICA PRODUCTION COMPANY: OWNER [+2]

Abstract

This invention relates to sand control screens for oil and gas wells. Disclosed in this paper is an advantageous method of securing a sand control screen to a base pipe. Also disclosed is a sand control screen assembly further having a tubular base pipe or connectors. The invention comprises a sand control assembly having a split coupling that eliminates the need for a welding step. The split coupling of the invention is a two-piece split coupling that comprises an end ring and tubular coupling. The split coupling of the invention comprises a taper and seal/interference instead of the weld and end ring seal of conventional processes.

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TITLE: 

SAND CONTROL SCREEN COMPRISING SPLIT COUPLING MEANS

ABSTRACT:

  This invention relates to sand control screens for oil and gas wells.  Disclosed in this paper is an advantageous method of securing a sand control screen to a base pipe.  Also disclosed is a sand control screen assembly further having a tubular base pipe or connectors.

  The invention comprises a sand control assembly having a split coupling that eliminates the need for a welding step.  The split coupling of the invention is a two-piece split coupling that comprises an end ring and tubular coupling.  The split coupling of the invention comprises a taper and seal/interference instead of the weld and end ring seal of conventional processes.

This invention relates to sand control screens for oil and gas wells.  Disclosed in this paper is an advantageous method of securing a sand control screen to a base pipe.  Also disclosed is a sand control screen assembly further having a tubular base pipe or connectors.

In the course of completing an oil and/or gas well, it is common practice to run a string of casing into the well bore and then to run the production tubing inside the casing, the casing being perforated across one or more hydrocarbon bearing zones ("producing zones") to allow produced fluids to enter the casing bore.  In some completions the well bore is uncased and an open face is established across the producing zone, for example, in horizontal well completions.

Following completion of the well, production of oil and/or gas may begin.  Silt or formation sand from unconsolidated formations flowing into the wellbore may lead to accumulation of fill within the wellbore, reduced production rates and damage to subsurface production equipment.  Sand may be swept into the flow path along with produced fluids and may cause erosion of tubing, flowlines, valves and processing equipment, or other downhole equipment and surface equipment.  Problems caused by sand production can significantly increase operational and maintenance expenses and can lead to a total loss of the well.

Therefore, with cased or uncased well bores, one or more sand control screens ("sand screens") may be installed in the flow path between the production tubing and the producing zone(s) in order to ameliorate the problem.

In a conventional sand screen manufacturing process, the sand screen may be attached to the base pipe in a process involving welding.  Such a process may typically include the steps of:

1.      the wrapping of a screen to the base pipe;

2.      the trimming of screen ends;

3.      the slipping over of at least one end ring; and

4.      the welding of the at least one end ring to the base pipe.

The end ring may be welded in place or may be heat shrunk to the outer diameter of the sand screen and then welded to a separate metal ring that was previously welded to the base pipe.

An example relating t...