Flowline and Injection Tee for Frac System

Abstract

A hydraulic fracturing assembly includes a frac tree that mounts to a wellhead. An injection tee mounts to the tree, the injection tee having an axial injection tee bore that registers with an axial flow bore of the frac tree. A single inlet passage in the injection tee extends from a flowline mounting face on an exterior portion of the injection tee downward and inward into a junction with the axial flow bore. A wear resistant inlet passage sleeve extends from the mounting face of the injection tee a selected distance into the inlet passage. The inlet passage sleeve is of a harder material than the injection tee. A flowline connects to the mounting face to deliver fluid into the inlet passage. The flowline has an upward curved section and an inclined section that joins the curved section and extends downward and outward away from the injection tee.

1 . A hydraulic fracturing assembly, comprising:
 a hydraulic fracturing tree having an axis and adapted to be mounted to a wellhead of a well with the axis vertical, the tree having an axial flow bore and valves that open and close the flow bore;   an injection tee mounted to the tree, the injection tee having an axial injection tee bore that registers with the axial flow bore;   a single inlet passage in the injection tee that extends from a flowline mounting face on an exterior portion of the injection tee downward and inward into a junction with the axial flow bore;   a wear resistant inlet passage sleeve that extends from the mounting face of the injection tee a selected distance into the inlet passage, the inlet passage sleeve being of a harder material than the injection tee; and   a flowline connected to the mounting face to deliver fluid into the inlet passage, the flowline having an upward curved section and an inclined section that joins the curved section and extends downward and outward away from the injection tee.   
     
     
         2 . The assembly according to  claim 1 , wherein:
 the inlet passage has an upward and outward facing shoulder; and   the inlet passage sleeve has a lower end that abuts the shoulder.   
     
     
         3 . The assembly according to  claim 1 , wherein:
 the inlet passage has an upward and outward facing shoulder spaced from the junction with the injection tee bore, defining an outer portion of the inlet passage and an inner portion of the inlet passage, the outer portion having a greater inner diameter than an inner diameter of the inner portion; and   the inlet passage sleeve has a lower end that abuts the shoulder, the inlet passage sleeve having an inner diameter that is the same as the inner diameter of the inner portion.   
     
     
         4 . The assembly according to  claim 1 , wherein:
 the mounting face is flat: and   the inlet passage sleeve has an outer portion that protrudes outward past the mounting face.   
     
     
         5 . The assembly according to  claim 1 , further comprising:
 a wear resistant injection tee bore sleeve positioned at a junction of the injection tee bore with the flow bore, the injection tee bore sleeve having a greater hardness than the injection tee.   
     
     
         6 . The assembly according to  claim 1 , further comprising:
 a support having a plurality of extensible legs, each having a clamp on an upper end that secures to a portion of the flowline and a base on a lower end for placement on ground.   
     
     
         7 . The assembly according to  claim 1 , further comprising:
 a support for the flowline, the support comprising:   a plurality of legs that are selectively extensible in length;   a clamp on an upper end of each of the legs that secures to a portion of the flowline;   a base on a lower end of each of the legs; and   an anchor stake extending from the base for imbedding in ground.   
     
     
         8 . The assembly according to  claim 1 , wherein:
 the flowline comprises a plurality of pipe joints having ends secured together; and   at least one of the pipe joints is extensible in length.   
     
     
         9 . The assembly according to  claim 1 , further comprising:
 a brace having an upper end connected to the injection tee and a lower end connected to a lower portion of the tree, the brace being located on an opposite side of the injection tee from the mounting face.   
     
     
         10 . The assembly according to  claim 1 , further comprising:
 a flow back passage extending from the injection tee bore outward in a direction opposite from the mounting face.   
     
     
         11 . A hydraulic fracturing assembly, comprising:
 a hydraulic fracturing tree having an axis and adapted to be mounted to a wellhead of a well with the axis vertical, the tree having an axial flow bore and valves that open and close the flow bore;   an injection tee mounted to an upper end of the tree, the injection tee having an axial injection tee bore that registers with the flow bore;   a single inlet passage in the injection tee that extends from a supply mounting face on the exterior portion of the injection tee downward and inward into a junction with the axial injection tee bore;   a flow back passage in the injection fee for flowing back well fluid from the well, the flow back passage extending from a flow back mounting face on an exterior portion of the injection tee to a junction with the axial injection tee bore, the flow back mounting face being on an opposite side of the injection tee from the supply mounting face; and   a supply flowline connected to the supply mounting face to deliver fluid into the inlet passage, the supply flowline having an upward curved section that joins the exterior portion of the tree, and an inclined section that joins the curved section and extends downward and outward away from the tree.   
     
     
         12 . The assembly according to  claim 11 , wherein;
 the inlet passage has an upward and outward feeing shoulder spaced from the junction with the injection tee bore, defining an outer portion of the inlet passage and an inner portion of the inlet passage, the outer portion having a greater inner diameter than an inner diameter of the inner portion; and the assembly further comprises   a wear resistant inlet passage sleeve installed in the outer portion of the inlet passage, the inlet passage sleeve having a lower end that abuts the shoulder, the inlet passage sleeve having an inner diameter that is the same as the inner diameter of the inner portion, and the inlet passage sleeve being of a harder material than the injection tee.   
     
     
         13 . The assembly according to  claim 12 , wherein:
 the inlet passage sleeve has an outer portion that protrudes outward past the mounting face.   
     
     
         14 . The assembly according to  claim 12 , further comprising:
 a wear resistant injection tee bore sleeve positioned at a junction of the injection tee bore with the flow bore, the injection tee bore sleeve having a greater hardness than the injection tee.   
     
     
         15 . The assembly according to  claim 11 , wherein:
 the supply flowline comprises a plurality of tubular members having ends secured together;   at least one of the tubular members comprises:   inner and outer tubes that telescope relative to each other;   external inner tube and outer tube flanges that face one another;   threaded rods extending from the inner tube flange through apertures in the outer tube flange; and   a nut that engages each of the threaded rods to fix a distance between the inner tube and the outer tube flanges.   
     
     
         16 . A hydraulic fracturing assembly, comprising:
 a hydraulic fracturing tree having an axis and adapted to be mounted to a wellhead of a well with the axis vertical, the free having an axial flow bore and valves that open and close the flow bore;   an injection tee mounted to an upper end of the tree, the injection tee having an axial injection tee bore that registers with the flow bore:   a single inlet passage in the injection tee that extends from a supply mounting face on the exterior portion of the injection tee downward and inward into a junction with the axial injection tee bore;   a supply flowline connected to the supply mounting face to deliver fluid into the inlet passage, the supply flowline having an upward curved section that joins the exterior portion of the tree, and an inclined section that joins the curved section and extends downward and outward away from the tree;   a plurality of support legs that are selectively extensible in length;   a clamp on an upper end of each of the legs that secures to a portion of the supply flowline;   a base on a lower end of each of the legs; and   an anchor stake extending from the base for imbedding in ground.   
     
     
         17 . The assembly according to  claim 16 , further comprising;
 at least one cross member extending between at least two of the legs perpendicular to the legs.   
     
     
         18 . The assembly according to  claim 16 , wherein:
 the supply flowline comprises a plurality of tubular members having ends secured together;   at least one of the tubular members comprises;   inner and outer tubes that telescope relative to each other;   external inner tube and outer tube flanges that face one another;   threaded rods extending from the inner tube flange through apertures in the outer tube flange;   a nut that engages each of the threaded rods to fix a distance between the inner tube and the outer tube flanges; and   a seal between an inner diameter of the outer tube and an outer diameter of the inner tube.   
     
     
         19 . The assembly according to  claim 16 , wherein:
 the supply flowline comprises a plurality of tubular members, each of the tubular members having un external flange on and end;   each of the tubular members having an internal seal recess at the end, the seal recesses mating with each other when the flanges are brought toward each other:   a seal located in the seal recess; and   a clamp that bolts around the flanges and draws the flanges toward each other.   
     
     
         20 . The assembly according to  claim 16 ,
 a wear resistant inlet passage sleeve that extends from the mounting face of the injection tee a selected distance into the inlet passage, the inlet passage sleeve being of a harder material than the injection tee; and   a wear resistant injection tee bore sleeve positioned at a junction of the injection tee bore with the flow bore, the injection tee bore sleeve having a greater hardness than the injection tee.