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US 4,381,821 AGranted
Blast joint and protection element therefor
AssigneeWeatherford, Stonebor, Inc.
InventorGeorge J. Greene, Jr.
Life of this patent
Estimating the term…
Abstract
A protection structure for a tubular member, such as a blast joint, and a protection element therefore which is an abrasion resistant half sleeve with an inward facing tongue and groove along one axial edge, an outward facing tongue and groove along the other axial edge, a groove in one arcuate end and a projection on the other arcuate end, two of said elements forming a protection ring and a plurality of said rings being supported on a tubular member by upper and lower supports which provide tongue and groove engagement with the upper end of the upper ring and with the lower end of the lower ring.
Claims21
A blast joint for a production tubing string comprising
- a section of tubing,
- a plurality of abrasion-resistant rings surrounding the exterior of said tubing section which is to be subjected to the high velocity fluids flowing from a producing formation into the annulus of the well bore through which said tubing section extends,
- each of said rings including two sections having a semicylindrical body with a first axial edge and a second axial edge, a first inward facing tongue adjacent said first axial edge, a first inward facing groove spaced from said first axial edge by said tongue, a second outward facing tongue adjacent said second axial edge, a second outward facing groove spaced from said second axial edge by said tongue, said sections being assembled to form said rings so that the outward facing tongue of the second edge engages in the inward facing groove of the first edge and the inward facing tongue of the first edge engages in the outward facing groove of the second edge,
- annular tongue and groove interconnecting means between each of said rings,
- means secured around said tubing section and interengaging with the lower end of the lower of said rings to retain said ring from outward movement radially away from said tubing section, to support said rings on said tubing section and to protect the lower rings against damage during movement of the tubing section in the well bore, and
- means secured around said tubing section and interengaging with the upper end of the upper of said rings to retain said ring from outward movement radially away from said tubing section, to retain said rings on said tubing section in engagement with each other and with said lower retaining means and to protect the upper rings against damage during movement of the tubing section in the well bore.
3 more elements
As a subcombination for providing abrasion protection to the exterior of a tubular member a protection element comprising
- a half sleeve of abrasion resistant material having axially extending edges and arcuate ends,
- one of said ends having a groove therein and the other end having a projection adapted to be received in the end groove of another of said half sleeves,
- one of said edges having an outward facing projection there along with an outward facing groove spaced from said edge by said projection,
- the other of said edges having an inward facing projection there along with an inward facing groove spaced from said other edge by said inward facing projection whereby two of said half sleeves interengage in the tongue and grooves along their edges to form a ring with an annular projection on one end and an annular groove on the other end.
1 more element
A protection structure for a tubular comprising
- a section of tubing,
- a plurality of abrasion-resistant rings surrounding the exterior of said tubing section which is to be subjected to the high velocity fluids flowing from a producing formation into the annulas of the well bore through which said tubing section extends,
- each of said rings including two sections having a semicylindrical body with a first axial edge and a second axial edge, a first inward facing tongue adjacent said first axial edge, a first inward facing groove spaced from said second axial edge by said tongue, the second edge having an outward facing tongue and an outward facing groove spaced from the edge by said tongue, said sections being assembled to form said rings so that the outward facing tongue of the second edge engages in the inward facing groove of the first edge and the inward facing tongue of the first edge engages in the outward facing groove of the second edge,
- annular tongue and groove interconnecting means between each of said rings, and
- means secured around said tubing section and interengaging with the lower end of the lower of said rings and the upper end of the upper of said rings to retain said rings from outward movement radially away from said tubing section, to support said rings on said tubing section and to protect the lower and upper rings against damage during movement of the tubing section in the well bore.
2 more elements
A sub-combination of a non-resilient abrasion resistant ring to be assembled on a production string to protect the string from abrasion, said ring comprising
- two sections, each section having a semicylindrical body with a first axial edge and a second axial edge, a first inward facing tongue adjacent said first axial edge, a first inward facing groove spaced from said first axial edge by said tongue, a second outward facing tongue adjacent said second axial edge, a second outward facing groove spaced from said second axial edge by said tongue, said sections being assembled to form said rings so that the outward facing tongue of the second edge engages in the inward facing groove of the first edge and the inward facing tongue of the first edge engages in the outward facing groove of the second edge, and
- an annular tongue at one end and an annular groove at the other end of each section.
Dependencies are inferred from the claim text.