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Splice Sub with Internal Profile for Cut to Release Premier Packer

IP.com Disclosure Number: IPCOM000236685D
Publication Date: 2014-May-08
Document File: 3 page(s) / 16K

Publishing Venue

The IP.com Prior Art Database

Related People

Baker Hughes Incorporated: OWNER [+3]

Abstract

Feed through packers are used in IWS completions. The cut to release method is either the primary or secondary means of removal from the well. These removable packers (example, the Premier Feed -Through Packers) connect control lines from the surface to hydraulic sliding sleeves below. In order to retrieve the packers, a section of the internal mandrel has to be cut to allow the packer components to be released from the well. There are two cut methods of retrieval available when using the production tubing in the completion: (1) retrieval on the completion string via a thru-tubing chemical cut; and/ or (2) retrieval on the completion string using thru-tubing mechanical cutter. In either case, the precision of locating the cutting zone inside the feed-through packer is very important. Currently, chemical cutting is the primary method of removal. This method needs to use a radioactive tag run to locate the cutting zone of the packer. A Baker Atlas Chemical Cutter is run on an appropriately designed wireline tool string consisting of weight bars, collar locator, firing sub, upper propellant sub, slip sub, lower propellant sub, chemical cylinder, cutting head and bull plug.

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Splice Sub with Internal Profile for Cut to Release Premier Packer

Abstract

Feed through packers are used in IWS completions.  The cut to release method is either the primary or secondary means of removal from the well. These removable packers (example, the Premier Feed -Through Packers) connect control lines from the surface to hydraulic sliding sleeves below.  In order to retrieve the packers,  a section of the internal mandrel has to be cut to allow the packer components to be released from the well. There are two cut methods of retrieval available when using the production tubing in the completion: (1) retrieval on the completion string via a thru-tubing chemical cut;  and/ or (2) retrieval on the completion string using thru-tubing mechanical cutter. In either case, the precision of locating the cutting zone inside the feed-through packer is very important.  Currently, chemical cutting is the primary method of removal. This method needs to use a radioactive tag run to locate the cutting zone of the packer. A Baker Atlas Chemical Cutter is run on an appropriately designed wireline tool string consisting of weight bars, collar locator, firing sub, upper propellant sub, slip sub, lower propellant sub, chemical cylinder, cutting head and bull plug.

The chemical cutter is run using a collar locator or a gamma ray correlation device. Once the cutting area is located,  the chemical cutter is anchored for the cutting operation.  The chemical cutter cuts through the packer mandrel allowing the packer and tail pipe to be retrieved. For the mechanical cut,  a custom Tubing Cutting Extension (TCE) is required. The TCE, placed above the Premier packer, allows the cutting Bottom Hole Assembly to locate and position itself across the cutting zone of the packer. A Baker DB under reamers run on an appropriately designed space- out assembly that uses an adjustable no-go locating sub and mud motor. The adjustable no-go locating sub places the DB under reamer in the cut required location. The space- out of the under reamer depends on an adjustable no-go locating sub that gives the cutting tool the abili...