Snap-on rod guide

A rod guide comprising:

• a. an elongated polymeric body;
• b. vanes projecting from and integral with the body;
• c. lands between some of the vanes;
• d. a-center-hole within the body;
• and
• e. an axial access channel into the center-hole permitting installation of the rod guide onto a sucker rod;
• wherein the body defines a thickness of polymeric material measured from each of said lands to the center-hole and the thickness of the body opposite the axial access channel is greater than another thickness of the body measured from another of said lands to the center-hole.

A rod guide comprising:

• a. an axial elongated polymeric body;
• b. a plurality of vanes projecting radially from and integral with the body;
• c. a center-hole co-axial within the body;
• and
• d. an axial access channel into the center-hole permitting installation of the rod guide onto a sucker rod, the axial access channel including a tapered mouth tapering from a point outside the body toward the center-hole;
• wherein the body, vanes, center-hole and channel are formed as an extruded bar-stock from which the rod guide is cut to a desired length.

A field-installable rod guide comprising:

• a. an axial elongated polymeric body;
• b. a plurality of vanes projecting radially from and integral with the body;
• c. a center-hole within the body defined by more than one circular radius of curvature;
• and
• d. an axial access channel into the center-hole permitting installation of the rod guide onto a sucker rod, the axial access channel including a tapered mouth tapering from a point outside the body toward the center-hole;
• wherein the body defines a thickness of polymeric material measured from each of said lands to the center-hole and the thickness of the body opposite the axial access channel is greater than another thickness of the body measured from another of said lands to the center-hole.

A rod guide comprising:

• a. an axially oriented extruded solid-cylindrical polymeric body;
• b. a co-axial center-hole within the body;
• c. an axial access channel into the center-hole permitting installation of the rod guide onto a sucker rod;
• and
• d. a flow channel formed on the body to permit fluid flow by the rod guide.

A rod guide comprising:

• a. an axial elongated polymeric body;
• b. a plurality of helical thread-type vanes projecting radially from and integral with the body;
• c. a center-hole co-axial within the body;
• and
• d. an axial access channel into the center-hole permitting installation of the rod guide onto a sucker rod, the axial access channel including a tapered mouth tapering from a point outside the body toward the center-hole;
• wherein the body, center-hole, and channel are formed as an extruded bar-stock from which the rod guide is cut to a desired length.