Connection assembly and method to assemble sucker rod
An assembled sucker rod includes a rod body with a rod end and an endpiece containing a receptacle at the rod end. An adhesive is set between the receptacle and rod end, and an insert is positioned through the endpiece's side, contacting the rod end, and resisting compressive loads. The endpiece has apertures for the insert, which has ends and an intermediate portion; the latter contacts the rod end compressively, while the ends contact the endpiece oppositely. The rod end may feature a hole or slot for the insert, or its distal portion may directly abut the insert.
1. A method of manufacturing an assembled sucker rod, the method comprising:
obtaining a rod body having a rod end;
obtaining an endpiece defining a receptacle configured to receive the rod end;
affixing the rod end inside the receptacle by applying an adhesive to at least one of the rod end and the receptacle, installing the rod end into the receptacle, setting the adhesive therebetween, and applying a tensile load between the rod end and the endpiece up to a tensile threshold; and
installing an insert through at least one side of the endpiece, into the receptacle in which the rod end is affixed, and positioned in contact with a portion of the rod end at least in a compressive direction toward the rod body, the insert being resistive to compressive load between the endpiece and the rod end.
2. The method of claim 1 , wherein setting the adhesive comprises at least one of a) applying a curing agent to the adhesive, b) allowing the adhesive to set for a period of time, c) applying heat to the adhesive, and d) applying pressure to the adhesive.
3. The method of claim 1 , wherein the adhesive comprises one of a) a two-part epoxy resin and b) a one-part epoxy resin.
4. The method of claim 1 , wherein affixing the rod end in the receptacle comprises wedging the adhesive in annular ramped profiles defined between the receptacle and the rod end.
5. The method of claim 1 , wherein installing the insert through the at least one side of the endpiece, into the receptacle in which the rod end is affixed, and positioned in contact with the portion of the rod end comprises:
drilling a hole through the at least one side of the endpiece, through the receptacle, and into at least a portion of an opposing side of the endpiece; and
installing the insert in the hole.
6. The method of claim 5 , further comprising at least one of: drilling the hole through the rod end, drilling the hole adjacent to a distal portion of the rod end, and drilling the hole at least partially into the distal portion of the rod end.
7. The method of claim 1 , wherein installing the insert comprises pre-drilling an aperture through the at least one side of the endpiece before affixing the rod end inside the receptacle.
8. A connection assembly for an assembled sucker rod having a rod body with a rod end, the connection assembly comprising:
an endpiece defining a receptacle, the receptacle being configured to receive the rod end, the endpiece defining a first aperture in one side of the endpiece and exposed to the receptacle, the endpiece defining a second aperture in at least a portion of an opposing side of the endpiece and exposed to the receptacle;
an adhesive being configured to affix in a set condition in an annular area between the receptacle and the rod end; and
an insert being resistive to compressive load between the endpiece and the rod end, the insert being insertable through the first aperture in the one side of the endpiece and being insertable in the second aperture in at least the portion of the opposing side of the endpiece, the insert being configured to position in contact with a portion of the rod end at least in a compressive direction toward the rod body.
9. The connection assembly of claim 8 , wherein the adhesive is configured to affix in the set condition by at least one of a) a curing agent, b) setting for a period of time, c) application of heat, and d) application of pressure.
10. The connection assembly of claim 8 , further comprises an engagement feature defined in the receptacle of the endpiece.
11. The connection assembly of claim 10 , wherein the engagement feature comprises at least one of thread, teeth, ridges, grooves, wedges, and ramps.
12. The connection assembly of claim 8 , wherein the insert is configured to at least one of:
insert in a hole defined through the rod end;
insert in a slot defined in a distal portion of the rod end; and
abut against the distal portion of the rod end.
13. An assembled sucker rod, comprising:
a rod body having a rod end;
an endpiece defining a receptacle disposed on the rod end;
an adhesive affixed in a set condition in an annular area between the receptacle and the rod end; and
an insert being installed through at least one side of the endpiece and into the receptacle in which the rod end is affixed, the insert being positioned in contact with a portion of the rod end at least in a compressive direction toward the rod body, the insert being resistive to compressive load between the endpiece and the rod end.
14. The assembled sucker rod of claim 13 , wherein the endpiece comprises:
a first aperture defined in the at least one side of the endpiece and exposed to the receptacle, the insert being installed in the first aperture; and
a second aperture defined in at least a portion of an opposing side of the endpiece and exposed to the receptacle, the insert being installed in the second aperture.
15. The assembled sucker rod of claim 13 , wherein the insert comprises opposing insert ends and an intermediate portion between the opposing insert ends; wherein the intermediate portion is positioned in contact at least in the compressive direction with the portion of the rod end; and wherein the opposing insert ends are positioned in contact with the endpiece at least in a direction opposite the compressive direction.
16. The assembled sucker rod of claim 13 , wherein the adhesive comprises at least one of a two-part epoxy resin and a one-part epoxy resin; wherein the rod body comprises at least one of a metal material, an aluminum, a steel, and a fiberglass; and wherein the endpiece comprises at least one of a metal material, a steel, and a forged and machined material; and wherein the insert comprises at least one of a metal material, a steel, a titanium, a composite material, a polymer, and a thermoplastic.
17. The assembled sucker rod of claim 13 , wherein the rod end defines a hole therethrough; and wherein the insert is installed in the hole.
18. The assembled sucker rod of claim 13 , wherein a distal portion of the rod end defines a slot, and wherein the insert is installed in the slot.
19. The assembled sucker rod of claim 13 , wherein a distal portion of the rod end abuts the insert.
20. A method of manufacturing an assembled sucker rod, the method comprising:
obtaining a rod body having a rod end;
obtaining an endpiece defining a receptacle configured to receive the rod end;
affixing the rod end inside the receptacle by applying an adhesive to at least one of the rod end and the receptacle, installing the rod end into the receptacle, setting the adhesive therebetween, and applying a tensile load between the rod end and the endpiece up to a tensile threshold;
drilling a hole through a side of the endpiece, through the receptacle, and into at least a portion of an opposing side of the endpiece; and
installing an insert in the hole and positioned in contact with a portion of the rod end at least in a compressive direction toward the rod body, the insert being resistive to compressive load between the endpiece and the rod end.
21. An assembled sucker rod, comprising:
a rod body having a rod end, wherein a distal portion of the rod end defines a slot;
an endpiece defining a receptacle disposed on the rod end;
an adhesive affixed in a set condition in an annular area between the receptacle and the rod end; and
an insert being installed through at least one side of the endpiece, wherein the insert is installed in the slot and is positioned in contact with a portion of the rod end at least in a compressive direction toward the rod body, the insert being resistive to compressive load between the endpiece and the rod end.