2445 results about "Sucker rod" patented technology

A wellbore evaluation system evaluates mechanical wear and corrosion to components of a well system including a production tubing string positionable in a well and a sucker rod string movable within the production tubing string. A deviation sensor determines a deviation profile of the production tubing string in the well, and a rod sensor senses and measures wear and corrosion to the sucker rod string as it is removed from the well to determine a rod profile. A data acquisition computer is in communication with the sensors for computing and comparing the deviation profile and the rod profile as a function of depth in the well. A 3-dimensional image of wellbores, with isogram mapping, may be generated and examined over the internet.

A method and system for pumping unit with an elastic rod system is applied to maximize fluid production. The maximum stroke of the pump and the shortest cycle time are calculated based on all static and dynamic properties of downhole and surface components without a limitation to angular speed of the prime mover. Limitations of structural and fatigue strength are incorporated into the optimization calculation to ensure safe operation while maximizing pumped volume and minimizing energy consumption. Calculated optimal prime mover speed is applied to the sucker rod pump by means of beam pumping, long stroke or hydraulic pumping unit by controlling velocity, acceleration and torque of the electric prime mover or by controlling pressure and flow rate in hydraulically actuated sucker rod pumping system.

A system of reciprocating bottom hole sucker rod pumps, situated in an oil well, to produce an oil rich stream to surface and inject a water stream to a same wellbore disposal zone. Two pumps vertically in tandem are actuated by a single sucker rod string. Separate intakes for each pump are situated so as to allow for gravity to segregate oil and water in the wellbore before reaching the intakes. Both streams are produced out of the pumps on the upstroke. Injection of the water stream is facilitated by an outer housing around the bottom pump to redirect flow to a disposal zone.

A wellbore evaluation system evaluates mechanical wear and corrosion to components of a well system including a production tubing string positionable in a well and a sucker rod string movable within the production tubing string. A deviation sensor determines a deviation profile of the well, a rod sensor senses and measures wear and corrosion to the sucker rod string as it is removed from the well to determine a rod profile, and a tubing sensor senses and measures wear and corrosion to the production tubing string as it is removed from the well to determine a tubing profile. A data acquisition computer is in communication with the sensors for computing and comparing two or more of the respective deviation profile, rod profile, and tubing profile as a function of depth in the well. A 3-dimensional image of wellbores, with isogram mapping, may be generated and examined over the internet.

A continuous sucker rod made of fibre reinforced composition has a covered complex structure. Its covering layer uses the transversely arranged aramid fibres or ultrahigh-molecular polyethene fibres as weft and the glass fibres-aramid fibre or ultrahigh-molecular polyethene fibres band structure in longitudinal direction. Its preparing process includes such steps as dewinding fibres, surface treating, immersing in resin, covering solidifying, post-solidifying and twining. Its advantages are high strength and adhesion, and good antiwear nature.

The invention discloses a digital, intelligent and hydraulic brake system of large and medium wind machine. The output end of the oil supply system links uniflow valve. Its output end joints to the first accumulator, pressure relay and input end of first plug-in valve through the first throttle valve. The output end of first plug-in valve links the second accumulator. Equip hydraulic cylinders with brake blocks on sucker-rod cavity end, two of which are taken as one group and are located relatively. The sucker-rod cavities of the hydraulic cylinders connect with the output ends of the first and second plug-in valve and the third linking switch valve through the bus. The output end of the second plug-in valve meets oil tank through second throttle valve. Two high-speed switch valves are taken as pilot stage together with two plug-in valves to form digital electro-hydraulic proportional valve. Brake blocks are equipped on both sides of brake chuck of the wind machine to change the open-close time ratio of high-speed switch valves and adjusts hydraulic braking force of the brake chuck. When meeting the working condition of unit braking, adjust the duty ratio of high-speed switch valves in unit time depending on wind speed and main shaft speed to realize intelligent control on braking force.

The invention relates to an automatic running and pulling system of an oilfield workover string, which comprises a blowout preventer, fixing slips, an oil pipe/sucker rod guide mechanism, an oil pipe/sucker rod locating mechanism, an oil pipe/sucker rod elevator component, a mechanical arm component, hydraulic clamps, a hydraulic clamps bracket, a control system, a base component and a string bent, wherein the mechanical arm component and the hydraulic clamps bracket are installed on the base component and are connected through a linkage component to carry out linkage movement, and the string bent is arranged on the side surface of the mechanical arm component and moves in match with the mechanical arm component. With the adoption of the automatic running and pulling system of the oilfield workover string, the automation of movements of snatching up, butt joint, clamping, upper unloading, elevating, lowering, arrangement and the like can be realized, manual string running and pulling operation at a wellhead is replaced, an equipment mechanism is simplified as much as possible, and an operation program is optimized.

A sucker rod string improved by the use of wear resistant, high temperature resistant, fiber-reinforced phenolic composite materials as centralizing guides on sucker rods and couplings, both molded on the rod and prepared as snap-on couplings for in-the-field use, and on magnet rod inserts, both rod box and pin magnet rod inserts, in which the thermosetting composites are used as sleeves, encapsulating housings, and centralizing guides. The magnet rod inserts and couplings are designed to be machined so that worn phenolic composite can be removed and replaced with fresh composite without removing or damaging the magnet. Processes are disclosed for integrating composite thermoset molding into sucker rod, coupling, and magnet rod insert manufacture and for refurbishing used components of a sucker rod string.

Solving wave equation with damp calculates rate of change from swabbing parameters including stroke, number of strokes, diameter of pump, depth of pump, diameter and length of sucker rod etc. to system effectiveness. Sorting rate of change is carried out according to magnitude of absolute value. Under limiting conditions of well yield, load, torque moment etc, analyzing degree of sensitivity of swabbing parameters, the invention optimizes a group of optimal swabbing parameters for oil pumping well system. The method can calculate out polished rod horsepower, efficiencies of sucker rod, and oil pipe difficult to calculate out before. Carrying out quantitative analysis for each factor affecting system effectiveness, the invention solves issue of designing complex parameters so as to raise system effectiveness. The invention is applicable to oil pumping well system composed of inclined well or straight well, different typed pumping units and electric motor.

The invention provides steel for a pumping rod resisting casinghead gas corrosion and a manufacture method thereof. The steel comprises the following chemical compositions by mass percentage: 0.05 to 0.25 percent of carbon, 0.50 to 2.00 percent of silicon, 1.10 to 2.50 percent of manganese, 0.02 to 0.50 percent of molybdenum, 0.02 to 0.50 percent of nickel, 0.50 to 1.50 percent of chromium, 0.01 to 0.10 percent of vanadium, 0.005 to 0.050 percent of aluminum, 0.02 to 0.10 percent of niobium, 0.05 to 0.50 percent of copper, 0.01 to 0.10 percent of titanium, less than or equal to 0.015 percent of sulphur, less than or equal to 0.020 percent of phosphorus, and the balance being ferrum. The method is to manufacture a pumping rod wire through a design of adding the niobium and other trace alloy elements and corresponding compositions into steel, and controlled rolling and controlled cooling organization control technology. The pumping rod manufactured by the wire has excellent oilwell medium corrosion resistance, proper strength, excellent plastic tenacity and excellent welding performance, thereby improving the service life and reliability of the pumping rod, and improving the whole stability of pumping equipment, and further solving the problem that the prior pumping rod has repeated stress failure caused by endurance of complex casinghead gas corrosion.

The present invention is high pressure water jet perforating and auxiliary pressure fracturing method and apparatus. The apparatus includes a sheath, a releasing adaptor in the upper end of the sheath, a guiding pipe plug in the lower end, a piston inside the sheath, a wedge connected to the lower end of the piston, a ram head connected to the wedge, a jetting hose with nozzle in the top and connected to a core tube, a control rod connected to the hose and the sucker rod, an upper lock to limit the piston and a lower lock to limit the core tube. Compared with available technology, the present invention has the advantages of further greater treating depth, long and large perforation, increased drainage area and capacity, no contamination to perforation, simplified perforating and pressure fracturing process and saving in oil producing cost.

An apparatus and seismic method for producing an shock wave in an oil well borehole, with a pumping unit arranged at the wellhead, a tubing string extending downward into the production casing of the well, a hollow cylinder assembly connected with the bottom of the tube string, and pair of plungers arranged within the cylinder assembly and connected with the pumping unit with sucker rods and a polish rod for compressing liquid contained within the cylinder assembly and discharging the compressed liquid into the production casing, thereby generating a shock wave. The cylinder assembly includes an upper cylinder, a lower cylinder below the upper cylinder, a crossover cylinder below the upper and lower cylinders, and a compression chamber cylinder containing a compression chamber arranged between the crossover cylinder and the upper cylinder. The lower cylinder is adapted to receive the lower plunger, and the upper cylinder is adapted to receive the upper plunger. The lower plunger has a larger diameter than the upper plunger, and the plunger movement effects the volume of the compression chamber by reduction, the liquid contained therein becomes compressed and is discharged on the down stroke into the well. In addition, remote seismic data is collected and processed from remote well locations.

An improved apparatus and method are provided, for pumping fluids, such as water and/or hydrocarbons, from a subterranean formation or reservoir, through use of a cranked rod pumping (CRP) apparatus for imparting reciprocating substantially vertical motion to a rod of a sucker-rod pump having a pump stroke. The CRP apparatus includes a motor driven cranked mechanical actuator arrangement. The cranked mechanical actuator arrangement includes a substantially vertically moveable member attached to the rod of the sucker-rod pump for imparting and controlling vertical motion of the rod of the sucker-rod pump. The actuator arrangement may include pneumatic counterbalancing.

The invention discloses an oil well intermittent pumping control system and method. The oil well intermittent pumping control system comprises an oil pumping unit, a controller and a motor, wherein the motor is connected with the oil pumping unit and used for driving the oil pumping unit; a rotational speed sensor and an electric parameter acquisition module are arranged on the motor and used for acquiring the output shaft rotational speed and the current and voltage value of the motor and sending to the controller; a load sensor and a displacement sensor are arranged on the oil pumping unit, connected with the controller and used for sending measured values of the load and the displacement of a well sucker rod of the oil pumping unit to the controller; and the controller is connected with the motor through a frequency converter and used for controlling start and stop of the motor. According to the oil well intermittent pumping control system, reasonable control is performed according to actual liquid outlet conditions, the requirement for supply and production coordination of an oil well is satisfied, intelligent stroke frequency adjustment and intelligent dynamic interval pumping control are utilized to realize energy saving and consumption reduction of the oil well and to reduce the loss of running equipment, follow-up control meets the demand for precise control of the oil well within a stroke cycle, the running efficiency of an oil well system is further improved, and the energy consumption is reduced.

The invention discloses an organosilicone-nano compound modified polyurea corrosion-resisting coating for a mechanical recovery well environment. The coating comprises the following components in percentage by volume: 50 percent of component A and 50 percent of component R, wherein the component A is semi-prepolymer which is synthesized by using 30 to 50 parts of polyisocyanates of which functionality degree is 2 to 2.7, 20 to 40 parts of polyol and 10 to 30 parts of organosilane; free isocyanate accounts for 13 to 18 percent of the semi-prepolymer; and the component R comprises the following components in part by weight: 10 to 30 parts of nano powder, 40 to 60 parts of amino-terminated polyether, and 5 to 30 parts of amine chain extender. The invention also discloses a preparation method for the organosilicone-nano compound modified polyurea corrosion-resisting coating for the mechanical recovery well environment. The coating has the advantages that when sprayed on a pretreated sucker rod by the method, the component A and the component R are cured quickly, and are wear-resistant and high temperature-resistant; and by matching of primer, the coating is strong in adhesion and is suitable for the mechanical recovery well environment of which the well depth is less than 2,500m.