Lead in guide assembly
AssigneeBaker Hughes Incorporated
InventorsJohn L. Baugh, George J. Melenyzer, James Peterson
Life of this patent
Estimating the term…
Abstract
A lead-in guide assembly is shown for centralizing a downhole tool being run from a well surface within a well bore to a selected downhole location. The lead-in guide can be utilized as a seal assembly guide including a seal carrier provided with a leading end and a trailing end which is made up in a tubing string leading to the well surface. A collapsible guide is located at the leading end of the seal carrier for centralizing the seal carrier within the surrounding cased well bore as the seal assembly is being run into position above a cooperating sealing bore located at a downhole location. The guide means moves to a retracted position as the assembly moves within the cooperating sealing bore.
Claims12
A seal assembly guide for centralizing a seal assembly being run from a well surface within a well bore to a cooperating sealing bore located at a downhole location, the seal assembly guide comprising:
- a tubular seal carrier having abutting means for locating the seal carrier at a desired depth within the cooperating sealing bore and having external seal means for establishing sealing integrity with the cooperating sealing bore, the tubular seal carrier having a leading end and having a trailing end adapted to be made up in a tubing string leading to the well surface;
- collapsible guide means located at the leading end of the tubular seal carrier for centralizing the seal carrier within the surrounding well bore, the guide means being collapsible between an expanded, running-in position while above the sealing bore and a retracted position within the cooperating sealing bore;
- and
- wherein the abutment means comprises a downwardly facing no-go shoulder on the tubular seal carrier for engaging a cooperable upwardly facing shoulder provided as a part of the cooperating sealing bore located at the downhole location.
A seal assembly guide for centralizing a seal assembly being run from a well surface within a cased well bore to a cooperating sealing bore including a receptacle portion located at a downhole location, the seal assembly guide comprising:
- a tubular seal carrier having abutting means for locating the seal carrier with respect to the receptacle portion of the cooperating sealing bore and having external seal means for establishing sealing integrity with the cooperating sealing bore, the tubular seal carrier having a leading end and having a trailing end adapted to be made up in a tubing string leading to the well surface;
- collapsible guide means located at the leading end of the tubular seal carrier for centralizing the seal carrier within the surrounding well casing as the tubular seal carrier is being lowered from the well surface, the guide means being collapsible between an extended, running-in position while above the sealing bore and a retracted position within the cooperating sealing bore;
- wherein the receptacle portion of the cooperating sealing bore defines a polished seal bore surface and wherein the external seal means on the tubular seal carrier establishes sealing integrity with the polished seal bore surface when the tubular seal carrier is positioned within the cooperating sealing bore;
- and
- wherein the abutment means comprises a downwardly facing no-go shoulder on the tubular seal carrier for engaging a cooperable upwardly facing shoulder on the receptacle portion of the sealing bore.
A seal assembly guide for centralizing a packoff seal assembly being run from a well surface within a cased well bore to a cooperating casing bore receptacle defining a polished seal bore surface located at a downhole location, the seal assembly guide comprising:
- a tubular seal carrier having a downwardly facing shoulder for locating the seal carrier with respect to a cooperable upwardly facing shoulder on the casing bore receptacle, the seal carrier having external seal means for establishing sealing integrity with the polished seal bore surface, the tubular seal carrier having a leading end and having a trailing end adapted to be made up in a tubing string leading to the well surface;
- collapsible guide means located at the leading end of the tubular seal carrier for centralizing the seal carrier within the surrounding cased well bore as the tubular seal carrier is being lowered from the well surface, the guide means being collapsible between an expanded, running-in position while above the casing bore receptacle and a retracted position within the polished seal bore surface.
Dependencies are inferred from the claim text.