Hydrodynamic, down-hole anchor
AssigneeTech Tac Company, Inc.
InventorLynn Dale Johnson
Life of this patent
Estimating the term…
Abstract
A method of removably anchoring well tubing in a well bore may include selecting a well having a bore diameter and an anchor positioned therein. The anchor may have a housing defining an anchor diameter and extension members extending therefrom toward the bore diameter. The bore diameter and anchor diameter may be spaced apart a distance defining an annulus therebetween and extending along the well. A tool sized to cut substantially exclusively within the annulus may be selected. The tool may be positioned within the annulus, rotated, and advanced to drive past the housing to remove the extension members between the housing and the bore diameter to free the anchor.
Claims21
A method of removably anchoring well tubing in a well bore, the method comprising:
- selecting a well having a bore diameter and an anchor positioned therein, the anchor having an exterior, a housing constituting a portion of the exterior end defining an anchor diameter at the portion and extension members extending from the housing toward the bore diameter, the bore diameter and anchor diameter spaced apart a distance defining an annulus therebetween and extending along the well;
- selecting a tool sized to cut substantially exclusively within the annulus;
- positioning the tool within the annulus;
- and
- driving the tool past the housing to remove the extension members between the housing and the bore diameter to free the anchor.
A method of removably anchoring well tubing in a well bore, the method comprising:
- selecting a well having a bore diameter and an anchor positioned therein, the anchor having an exterior and comprising a mandrel, at least one slip, and a housing constituting the majority, by area, of the exterior and defining an anchor diameter, the bore diameter and anchor diameter spaced apart a distance defining an annulus therebetween and extending along the well;
- selecting a tool sized to cut substantially exclusively within the annulus;
- positioning the tool within the annulus;
- and
- driving the tool past the housing to remove a portion of the at least one slip extending into the annulus to free the anchor.
A method comprising:
- selecting a coal bed methane well having a bore diameter and an anchor inoperatively lodged therein, the anchor having an exterior and comprising a mandrel surrounded by three slips, at least three drag springs, and a housing constituting the majority, by are, of the exterior and defining an anchor diameter, the bore diameter and anchor diameter spaced apart a distance defining an annulus therebetween and extending along the well;
- selecting a coring drill bit sized to fit substantially exclusively within the annulus;
- positioning the coring drill bit within the annulus;
- and
- rotating and advancing the coring drill bit to remove the portions of the three slips and at least three drag springs positioned within the annulus to free the anchor.
Dependencies are inferred from the claim text.