Washing cement from around disconnectible down hole connection

Claim 2

For incorporation intermediate a string of inner casing to be hung with respect to an outer string of casing of a petroleum well wherein the intercasing annulus is to be at least partly filled with a pumpable material such as an hydraulic cement slurry, then an upper portion of said pumpable material removed by circulating a washing fluid, a well completion equipment assembly including: a tubular hanger body having means defining a downwardly facing exterior shoulder thereon; means defining at least downward circulation flute on said hanger body communicating between the exterior of said hanger body above said shoulder, at an inlet of said downward circulation flute, and the exterior of said hanger body below said shoulder, at an outlet of said downward circulation flute; means defining at least one upward circulation flute on said hanger body communicating between a location adjacent the outlet of said at lest one downward circulation flute, at an inlet of said upward circulation flute, and the exterior of said hanger body above said shoulder, at an outlet of said upward circulation flute; tubular conduit means extending coaxially upwardly from said hanger body in sealed communication with the bore of said hanger body, said tubular conduit means including a tubular tie-back collar spaced axially above said exterior shoulder of said hanger body; means defining at least one circulation port extending laterally through said tie-back collar for communicating the bore thereof with the exterior thereof; closure means for selectively blinding and opening said at least one circulation port; and wash pipe conduit means having one end thereof communicated to the at least one circulation port to receive wash fluid exiting from said tie-back collar bore through said at least one circulation port, and having the opposite end thereof disposed adjacent said inlet of said at least one downward circulation flute for directing the received wash fluid downwardly into said at least one downward circulation flute, whereupon said wash fluid may pass out of the outlet of said at least one downward circulation flute, into the inlet of said at least one upward circulation flute and out of the outlet of said at least one upward circulation flute.

Claim 3

The assembly of claim 1 wherein the vertical separation of said at least one circulation port and said downwardly facing exterior shoulder is at least 6 feet.

Claim 4

The assembly of claim 1 wherein said wash pipe conduit means comprises a tubular sleeve spacedly surrounding said tubular conduit means, being sealingly circumferentially secured to said tie-back collar above said at least one circulation port, and being sealingly circumferentially secured to said hanger body radially intermediate the extent of the hanger body.

Claim 5

The assembly of claim 3 wherein said tie-back collar includes means defining at least one flute in the exterior thereof said at least one flute extending downwardly from communIcation with said at least one circulation port.

Claim 6

The assembly of claim 1 wherein said wash pipe conduit means comprises: elbow means having a horizontally directed leg connected to said at least one circulation port and a vertically downwardly directed leg, and a vertical wash pipe having an open lower end and an upper end connected to said elbow vertically downwardly directed leg.

Claim 7

The assembly of claim 5 wherein said wash pipe open lower end is disposed within said at least one downward circulation flute.

Claim 8

The assembly of claim 6 wherein said at least one downward circulation flute and said at least one upward circulation flute are disposed angularly spacedly adjacent one another.

Claim 9

The assembly of claim 5 wherein said at least one circulation port is provided by a plurality of angularly spaced circulation ports; wherein said at least one downward circulation flute is provided by a plurality of angularly spaced downward circulation flutes; and wherein said at least one upward circulation flute is provided by a plurality of angularly spaced upward circulation flutes; said wash pipe conduit means comprising a said elbow means and a said vertical wash pipe connected thereto for each circulation port; securement means carried on said tubular conduit means near the lower ends of the wash pipes bracing each wash pipe with respect to said tubular conduit means.

Claim 10

The assembly of claim 8 further comprising an annular manifold interconnecting all of said circulation ports and all of said elbow means horizontally directed legs.

Claim 11

The assembly of claim 1 wherein said hanger body includes an expansible split-ring-type hanger, said downwardly facing exterior shoulder being defined by a lower end surface of said split-ring-type hanger.

Claim 12

For incorporation intermediate a string of inner casing to be hung with respect to an outer string of casing of a petroleum well wherein the intercasing annulus is to be at least partly filled with a pumpable material such as an hydraulic cement slurry, then an upper portion of said pumpable material removed by circulating a washing fluid, a well completion equipment assembly including: tubular hanger body having means defining a downwardly facing exterior shoulder thereon; means defining at least one downward circulation flute on said hanger body communicating between the exterior of said hanger body above said shoulder, at an inlet of said downward circulation flute, and the exterior of said hanger body below said shoulder, at an outlet of said downward circulation flute; a tubular outer casing string hanger seat member having means defining a radially inwardly protruding, upwardly facing shoulder in the bore thereof configured to support said hanger body via said downwardly facing exterior shoulder of said hanger body; means defining at least one upward circulation flute in said tubular outer casing string hanger seat member communicating between the bore of said member below said upwardly facing shoulder at an inlet of said at least one upward circulation flute and the bore of said member above said upwardly facing shoulder at an outlet of said at least one upward circulation flute; tubular conduit means extending coaxially upwardly from said hanger body in sealed communication with the bore of said hanger body, aid tubular conduit means including a tubular tie-back collar spaced axially above said exterior shoulder of said hanger body; means defining at least one circulation port extending laterally through said tie-back collar for communicating the bore thereof with the exterior thereof; closure means for selectively blinding and opening said at least one circulation port; and wash pipe conduit means having one end thereof communicated to the at least one circulation port to receive wash fluid exiting from said tie-back collar bore through said at least one circulation port, and having the opposite end thereof disposed adjacent said inlet of said at least one downward circulAtion flute for directing the received wash fluid downwardly into said at least one downward circulation flute, whereupon said wash fluid may pass out of the outlet of said at least one downward circulation flute, into the inlet of said at least one upward circulation flute and out of the outlet of said at least one upward circulation flute.

Claim 13

For incorporation intermediate a string of inner casing to be hung with respect to an outer string of casing of a petroleum well wherein the intercasing annulus is to be at least partly filled with a pumpable material such as an hydraulic cement slurry, then an upper portion of said pumpable material removed by circulating a washing fluid, a well completion equipment assembly including: tubular hanger body having means defining a downwardly facing exterior shoulder thereon; means defining at least one downward circulation flute on said hanger body communicating between the exterior of said hanger body above said shoulder, at an inlet of said downward circulation flute, and the exterior of said hanger body below said shoulder, at an outlet of said downward circulation flute; a tubular outer casing string hanger seat member having means defining a radially inwardly protruding, upwardly facing shoulder in the bore thereof configured to support said hanger body via said downwardly facing exterior shoulder of said hanger body; means defining at least one upward circulation flute in said tubular outer casing string hanger seat member communicating between the bore of said member below said upwardly facing shoulder at an inlet of said at least one upward circulation flute and the bore of said member above said upwardly facing shoulder at an outlet of said at least one upward circulation flute; tubular conduit means extending coaxially upwardly from said hanger body in sealed communication with the bore of said hanger body, aid tubular conduit means including a tubular tie-back collar spaced axially above said exterior shoulder of said hanger body; means defining at least one circulation port extending laterally through said tie-back collar for communicating the bore thereof with the exterior thereof; closure means for selectively blinding and opening said at least one circulation port; and wash pipe conduit means having one end thereof communicated to the at least one circulation port to receive wash fluid exiting from said tie-back collar bore through said at least one circulation port, and having the opposite end thereof disposed adjacent said inlet of said at least one downward circulAtion flute for directing the received wash fluid downwardly into said at least one downward circulation flute, whereupon said wash fluid may pass out of the outlet of said at least one downward circulation flute, into the inlet of said at least one upward circulation flute and out of the outlet of said at least one upward circulation flute.