Patent ID: 6808019
Filing Date: 2004-10-26
Classification: E21B

Abstract:
A guide used on a sucker rod vertically reciprocated within tubing in which the tubing has an internal cylindrical surface of diameter â€œDâ€  comprising:an elongated tubular body portion having an upper end and a lower end and having an external, generally cylindrical surface and a concentric central opening therethrough of internal diameter substantially conforming to the external cylindrical surface of the sucker rod and having integral first and second increased thickness guide portions, each guide portion having a contact surface of a generally streamlined teardrop shape, the second guide portion guide surface being elevationally inverted compared to the first guide surface, the guide surfaces each being semi-cylindrical of diameter slightly less than â€œDâ€  and of maximum circumference of at least about 180Â° adjacent a first end, the first and second guide portions being rotationally spaced opposite of each other providing laminar first and opposed second separate flow passageways therebetween each extending uninterruptedly between said tubular body upper and lower ends.