| Patent Number |
Title Of Patent |
Date Issued |
| 5806591 |
Rod guide |
September 15, 1998 |
| A rod guide for maintaining a rod of a sucker rod string in substantially central position in a well tubing during reciprocal movement of the sucker rod string in the well tubing. |
| 5740862 |
Rod guide assembly |
April 21, 1998 |
| A rod guide assembly having a mount rigidly molded on rod shank, a centralizer rotatably mounted on the mount having, closure means between the mount and the centralizer for preventing flow of particles into the centralizer. |
| 5613556 |
Rod guide and method of an apparatus for installing it on the shank of a rod |
March 25, 1997 |
| A guide for the rods of a rod string having a plurality of of units spaced longitudinally on the shank of the rod to provide a flex rod portion therebetween and a method of and apparatus for installing the guide unit on the shank. |
| 5547020 |
Corrosion control well installation |
August 20, 1996 |
| Corrosion control cathodic protection for the rod string and the well tubing. Anode assemblies for mounting on the rods of the rod string. |
| 5191938 |
Rod guide assembly and method of its installation on a rod shank |
March 9, 1993 |
| A rod guide assembly having a mount moulded on the rod guide shank and a centralizer rotatably mounted on the mount and the method of installing the assembly on a rod guide shank. |
| 5119876 |
Well tool |
June 9, 1992 |
| A stabilizer rod connectible in a sucker rod string of a sub-surface well pump having a shank of greater diameter than the shanks of the sucker rods of the string and connector means at its opposite ends whose diameter is not greater than that of the connector means at the ends of the su |
| 4997039 |
Rod centralizer |
March 5, 1991 |
| A centralizer for a pump rod string which minimizes the resistance offered thereby to flow of well fluids therepast having a body provided with two pairs of longitudinally and circumferentially spaced radially outwardly extending ribs and a circumferential area of reduced external diamet |
| 4809777 |
Well tool |
March 7, 1989 |
| A centralizer for pump rod string which minimizes the resistance offered thereby to flow of well fluids therepast having two pairs of longitudinally and circumferentially spaced radially outwardly extending ribs. |
| 4787448 |
Rod guide |
November 29, 1988 |
| A rod guide assembly for rods of a sucker rod string having a pair of longitudinally spaced stops rigidly secured to the sucker rod and a plurality of independently movable guide body sections mounted on the rod between these stops for limited longitudinal movement between these stops. |
| 4589483 |
Rod centralizer |
May 20, 1986 |
| A well tool, such as a paraffin scraper or centralizer, installable on a rod of a pump rod string, which is composed of two longitudinal sections longitudinally movable relative to one another on a rod interposed therebetween into clamping locked position on the rod and a resilient l |
| 4575163 |
Rod guide |
March 11, 1986 |
| A guide for a sucker rod employed to actuate a pump connected in the tubing of a well whose body is formed of a resilient substance and adapted to resiliently grip the rod, the body having cam surfaces engageable with the rod for facilitating the mounting of the guide on the rod and arcu |
| 4522368 |
Closure device |
June 11, 1985 |
| A closure device connectible to a well head through which the polished rod of a rod string extends into a well tubing for operating pump means for moving well fluids to a surface flow conductor, the closure device having a tubular ram provided with a packing or plug for closing an annula |
| 4380347 |
Well tool |
April 19, 1983 |
| A well tool, such as a drilling pipe string, whose joints are provided with tubular protectors which are restrained against vertical movement on the joints while permitting rotation of the drilling pipe string relative thereto when the protectors engage the internal surfaces of a well bo |
| 4249831 |
Well tool |
February 10, 1981 |
| A sinker bar connectable to other sinker bars, sucker rods and the reciprocable operator of a down hole pump by use of conventional elevator and hoist connectors without the use of auxiliary devices such as pony sucker rods, the sinker bar having a reduced intermediate portion below |
| 4150786 |
Temperature sensor means with integral temperature limit functions |
April 24, 1979 |
| A temperature control system, shown as a differential temperature control system, uses a special temperature sensor means. The temperature sensor means includes a resistance temperature responsive element that is paralleled by one or more temperature responsive switches that act as a |
| 3942824 |
Well tool protector |
March 9, 1976 |
| A protector for well tools such as drill pipe tubing, and the like, which is positionable about a joint of a drill pipe or tubing and which is moved into pre-determined position on the box-half of a tool joint by the pin-half of the tool joint as it is moved into telescoped and threaded |
