Bottom hole fluid pressure communicating probe and locking mandrel
AssigneeOtis Engineering Corporation
InventorsImre I. Gazda, Albert W. Carroll
Life of this patent
Estimating the term…
Abstract
A well bottom hole fluid pressure measuring structure including external to internal pressure transducer fluid passage communicating structure with pressure balancing on engaged probe members to prevent undesired pressure lift separation of one probe section from another. A locking mandrel, landing nipple and probe structure is provided with positioning of the probe to the lock set state holding the mandrel in a locked state such that fluid pressure differential across the mandrel cannot unlock the probe from the mandrel.
Claims60
A well hole fluid pressure communicating probe structure for measuring well pressure below a well packer seal located between a mandrel and the well casing bore including, lower structure means with downward travel limit means;
- probe means connectable to a chamber adapted for containing a fluid pressure sensing device;
- fluid passage means in said lower structure means in fluid communication with well space below the well packer;
- fluid passage means in said probe means connectable to said chamber;
- cooperative telescoping projection means and opening means included with said lower structure means and said probe means having fluid passage openings positionable for establishing fluid communication between said fluid passage means in said lower structure means and said fluid passage means in said probe means;
- spaced upper seal structure means and lower seal structure means positioned in said cooperative telescoping projection means and opening means structure to be, respectively, above and below said fluid passage openings when they are positioned for establishing fluid communication between said fluid passage means in said lower structure means and said fluid passage means in said probe means;
- and wherein said cooperative telescoping projection means and opening means are, respectively, with the projection means a part of said lower structure means, and with said opening means in said probe means.
A well locking mandrel equipped with landing key means for being landed in a well casing landing nipple, and when in place in a well, having a well packer seal located between the mandrel and the well casing bore including, spring-loaded landing keys adapted for landing in mating recesses of a casing landing nipple;
- locking dog means held in dog housing means of said locking mandrel for movement radially outward and inward into and out of locking projection into an annular dog receiving lock recess provided in the casing landing nipple;
- camming drive means for camming said locking dog means radially outwardly into a dog receiving lock recess in the casing landing nipple;
- said camming drive means including sleeve means movable in the structure of the mandrel assembly from a non-lock position to a dog-cammed locked position;
- a fishing neck extension included with said sleeve means, with said sleeve means and fishing neck extension mounted for being longitudinally movable through a range of movement in the well locking mandrel structure;
- a mandrel collet extension included in the mandrel structure with a plurality of mandrel collet extension fingers extending upwardly within said sleeve means;
- said collet extension fingers being equipped with radially outwardly extended lock projections equipped with upper and lower cam surfaces;
- annular shoulder means with cam sloped edges in said sleeve means and fishing neck extension structure cooperatively engageable by said collet extension finger projections and with finger projections being resiliently deflectable inwardly and outwardly in cam riding over said annular shoulder means into and out of annular recess means provided in said sleeve means and fishing neck extension;
- and with said collet extension fingers defining, collectively, an internal bore of a first size with the finger projections in annular recess means of said sleeve means and said fishing neck extension and an internal bore of smaller size when said finger projections are riding on said annular shoulder means;
- and with said collet extension fingers in a locked state retention in annular recess means of said sleeve means and said fishing neck extension when a locking member, having a diameter less than the internal bore of said first size and greater than the internal bore of smaller size defined by the collective interiors of said collet extension fingers, is positioned within the bore of said fingers.
A well hole fluid pressure communicating probe structure for measuring well pressure below a well packer seal located between a mandrel and the well casing bore including, a housing in said mandrel;
- a probe assembly longitudinally movable within said housing;
- fluid passage means connected to a chamber within said probe assembly;
- fluid passage means in said housing in fluid communication with well space below the well packer seal;
- cooperative telescoping projection and opening means included with said housing and said probe assembly, and having fluid passage openings positionable for establishing fluid communication between said fluid passage means in said housing and said fluid passage means in said probe assembly;
- and wherein the telescoping projection is part of said housing;
- and said opening means is an opening in said probe assembly sized to slidingly receive said telescoping projection in telescoping relation.
A well hole fluid communicating probe structure for well fluid communication from below a well packer seal located between a mandrel and the well casing bore including, a housing in said mandrel;
- a probe assembly longitudinally movable within said housing;
- fluid passage means through said probe assembly;
- fluid passage means in said housing in fluid communication with well space below the well packer seal;
- cooperative telescoping projection and opening means included with said housing and said probe assembly, and having fluid passage openings positionable for establishing fluid communication between said fluid passage means in said housing and said fluid passage means in said probe assembly;
- and wherein the telescoping projection is part of said housing;
- and said opening means is an opening in said probe assembly sized to slidingly receive said telescoping projection in telescoping relation.
In a tubular casing landing and tool structure a locking system for locating and position locking in grooves of the tube casing, or a casing landing nipple in the tube, a mandrel including spring-loaded landing keys adapted for landing in mating recesses of the tube casing;
- locking dog means held in dog housing means of said locking mandrel for movement radially outward and inward into and out of locking projection into an annular dog receiving lock recess provided in the tube casing;
- camming drive means for camming said locking dog means radially outwardly into a dog receiving lock recess in the tube casing;
- said camming drive means including sleeve means movable in the structure of the mandrel assembly from a non-lock position to a dog-cammed locked position;
- said sleeve means mounted for being longitudinally movable through a range of movement in the locking mandrel structure;
- a mandrel collet extension included in the mandrel structure with a plurality of mandrel collet extension fingers extending upwardly within said sleeve means;
- said collet extension fingers being equipped with radially outwardly extended lock projections equipped with upper and lower cam surfaces;
- annular shoulder means with cam sloped edges in said sleeve means and fishing neck extension structure cooperatively engageable by said collet extension finger projections and with finger projections being resiliently deflectable inwardly and outwardly in cam riding over said annular shoulder means into and out of annular recess means provided in said sleeve means;
- and with said collet extension fingers defining, collectively, an internal bore of a first size with the finger projections in annular recess means of said sleeve means and an internal bore of smaller size when said finger projections are riding on said annular shoulder means;
- and with said collet extension fingers in a locked state retention in annular recess means of said sleeve means when a locking member, having a diameter less than the internal bore of said first size and greater than the internal bore of smaller size defined by the collective interiors of said collet extension fingers, is positioned within the bore of said fingers.
Dependencies are inferred from the claim text.