Class / Patent application number | Description | Number of patent applications / Date published |
417056000 | DRILLED WELL FREE PISTON-TYPE PUMP | 6 |
20090246037 | SAFETY CLAMP FOR WALKING BEAM COMPRESSOR - Various methods and devices are provided for securing a walking beam compressor to a walking beam. In general, the walking beam compressor is a gas compressor unit that can be disposed around a piston rod extending from a walking beam of an oil well. The piston rod can be coupled to the walking beam by a securing mechanism that engages both the piston rod and the walking beam to prevent the piston rod from disengaging from the walking beam during rocking movement of the walking beam. | 10-01-2009 |
20140234126 | TOWER-TYPE DOUBLE-CHAIN BELT PUMPING UNIT - The invention discloses a tower-type double-chain belt pumping unit, comprising a tower bracket, wherein the top of the tower bracket is provided with a first belt roller and a second belt roller spaced in parallel apart from each other, one side of the tower bracket where the second belt roller is located is provided with an erect device cabin, and the side of the tower bracket where the first belt roller is located is provided with a vertically extending windproof guide rail; and a reciprocating loading belt, spanning over the first belt roller and the second belt roller, and comprising an inside end located in the device cabin of the tower bracket and an outside end extending outside the tower bracket, wherein the outside end is provided with a rope hanger for connecting a pumping rod, and the rope hanger is provided with a guide wheel mated with the windproof guide rail, wherein a balance box connected with the inside end of the loading belt and a first chain driving mechanism and a second chain driving mechanism for driving the lifting movement of the balance box are arranged in the device cabin. With the four-column tower-type structure adopted in the invention, the stability of the device can be improved greatly, the influence of wind load during pumping can be avoided, and the reliability of the device can be increased. | 08-21-2014 |
20140271260 | WINCHED ROD PUMP APPARATUS AND METHOD - An apparatus and method for pumping fluids with a winched rod pumping apparatus for imparting reciprocating substantially vertical motion to a rod of a sucker-rod pump. A winched rod pumping apparatus, includes a motor driven winch drum and cable mechanical actuator arrangement. The winch drum and cable mechanical actuator arrangement includes a substantially vertically moveable member attached to the rod of the sucker-rod pump. The vertical moveable member is coupled to one end of the cable and the other end of the cable is coupled to the winch drum. The winch drum is configured to rotate in one direction to index the rod in a vertical up direction and to index the rod in a vertical down direction, with the winch drum completing at least one full rotation and the rod completing one cycle. The rod cycle is in relation to a pumping cycle for the down hole pump. | 09-18-2014 |
417058000 | Having condition or position responsive control of motive fluid supply | 1 |
20110014064 | HYDRAULIC OIL WELL PUMPING APPARATUS - A hydraulic oil well pumping arrangement employs a compensating type hydraulic pump, a directional valving arrangement and a proportioning valving arrangement. When the directional valve is energized, oil is directed to the rod end of the hydraulic cylinder. The rod or piston part of the hydraulic cylinder will then elevate until a first limit switch is actuated which then will de-energize the directional valve and send a current signal to the proportional valve. This current signal to the proportional valve forces it to open to a point at which the cylinder rod would extend at the desired velocity until it reaches a second limit switch. The second limit switch is near the bottom (for example, 1 foot, or 0.30 meters) of travel of the rod or piston. The current signal to the proportional valve is then decreased, creating a choking arrangement that forces the cylinder rod to decelerate. The cylinder rod then reaches another limit switch. Upon reaching the third limit switch, the signal is removed from the proportional valve so that it closes. This halts a draining of fluid from the hydraulic cylinder. At the same time, a voltage signal is sent to the directional valve opening it so that pump flow again travels from the pump to the hydraulic cylinder and once again elevates the rod and the connected pumping string or sucker rod. | 01-20-2011 |
417059000 | Radially expansible piston portion controls pump and motor chamber intercommunication | 1 |
20090074591 | HIGH PRESSURE RADIAL PUMP | 03-19-2009 |
417060000 | Mechanically actuated valve carried by piston | 1 |
20090068026 | Downhole Pump - An apparatus for pumping fluids from a geologic formation comprising a submersible motor having a motor shaft, wherein said submersible motor is reversible and has a plurality of speed settings; a pump housing connected to said submersible motor by a motor mount, wherein said pump housing has a lubricant contained therein; and a tube connected to said pump housing having a pump barrel disposed therein, wherein said pump barrel has an upper barrel connector that is connected to a standing valve; whereby a reciprocating motion by a ball nut applies said lubricant on a ball screw, and associated method of use. | 03-12-2009 |