CN201620834U - Shear connecting rod beamless oil extractor - Google Patents

Abstract

The utility model relates to a shear connecting rod beamless oil extractor. The lower-end position of a support is fixedly connected onto a base; a motor is installed on a base inside a support frame and connected with a speed reducer through a belt transmission mechanism; a variable crank on an output shaft of the speed reducer is connected with a trough-type sliding block through a connecting rod; guide bearings arranged on two sides of the trough-type sliding block are connected with a multi-stage four-link transmission mechanism through a push-pull rod; a plurality of tension springs are installed at the upper-end position of the multi-stage four-link transmission mechanism; the other ends of the plurality of tension springs are respectively connected with spring fixing rods fixedly arranged above or below a movable pulley supporting rod; a counterweight wheel and a fixed pulley which are symmetric are arranged on two sides of the top end position of the support; and the counterweight wheel and the fixed pulley are respectively connected with suspension point load and counterweight through counterweight ropes. The shear connecting rod beamless oil extractor has the advantages of simple structure, reasonable design, safety, reliability, convenient maintenance, light weight, no walking beams, low energy consumption, raw material saving, large travel and strong adaptability.

Description

The scissors connecting rod does not have the beam oil pumper

Technical field

The utility model relates to a kind of oil field does not have the beam oil pumper with the scissors connecting rod.

Background technology

At present, oil field, home and abroad oil recovery machiner mostly is the common beam oil pumper greatly.Because it is simple in structure, sturdy reliable, operating maintenance is convenient, is fit to the oil extraction of various operating modes and is widely adopted.But this pumping production system effectiveness is low, energy consumption is big, power consumption is many, and the cost height has become the problem of needing solution badly.The active service beam-pumping unit gross efficiency of China on average has only 12-23% in general area, and advanced area is also less than 30%, and the similar efficiency of the pumping unit of the U.S. is higher, but also only has 46%.

Because China oil field mostly is hyposmosis, low energy, stripper field, thereby continually developing along with the oil field, crude oil water content constantly rises, formation pressure and well fluid level constantly descend, keep stable production of crude oil just must strengthen and adopt liquid measure, this has just strengthened cost for oil production, entered with water change oil, with the electricity state of changing oil.For a change in the difficult problem that this efficient is low, energy consumption is big of labour conventional pumping unit, the home and abroad has been developed multiple energy-saving pumping unit in succession in recent years.As: the TOROM-ASTER out-phase type oil pumper economize on electricity 15-35% of the CMI company development of the U.S.; The MARK-II type forward type oil pumper of the Lufilin company exploitation of the U.S. on average economizes on electricity 36.8%; The offset energy-saving pumping unit system effectiveness of China improves 3.68%, unit consumption descends 14.87%, two horse head energy-saving pumping unit system effectivenesies of North China Oilfield exploitation improve 8.22%, unit consumption descends 24.5%, the oil sucking machine of compound permanent magnet motor of latest domestic release and stroke are 6 meters in addition, weigh 50 tons largest common beam oil pumper adopts the new pumping unit of energy-conservation driving arrangements such as discrepancy in elevation rate of rotation motor, synchronous motor, frequency converter in addition.In these equipment, have plenty of on former oil pumper basis by oil pumper four bar optimum design of structuresprogram or change balance system of pumping unit are improved oil recovery efficiency, though it is simple, improvement expenses is low, but can not fundamentally solve the working condition of oil pumper, do not match with the motor operating characteristic, energy consumption is still high; The change that has the motor operating characteristic, though be complementary with oil pumper work operating mode, also reached energy-conservation purpose, the cost expense is too high, be unfavorable for promoting the needs that to satisfy that China's oilfield exploitation is energy-saving and cost-reducing, high-adaptability and long stroke do not have the development of beam oil pumper on a large scale.

Summary of the invention

The purpose of this utility model is to overcome the weak point that exists in the above-mentioned technology, provides a kind of simple in structure, reasonable in design, energy saving, solution easy to maintenance oil field active service common beam efficiency of the pumping unit scissors connecting rod low, that energy consumption is big, power consumption is many, cost is high not to have the beam oil pumper.

In order to achieve the above object, the technical solution adopted in the utility model is: the support lower end part is connected on the base, on the base in the stand frame motor is housed, join by belt gear and reducer, variable crank on the reducer output shaft links to each other with the grooved slide block by connecting rod, grooved slide block both sides are provided with guide bearing and link to each other with multistage four jointed gear units through pull bar, the multiple tracks extension spring is equipped with at position, multistage four jointed gear units upper end, the multiple tracks extension spring other end joins with the spring fixed bar that is fixed on the setting of movable pulley pole upper and lower respectively, there are symmetrical weighting distribution wheel and fixed pulley in both sides, cantilever tip position, and two link to each other with counterweight with polished rod load respectively by the counterweight rope between taking turns.

The utility model has the advantages that:

The advantage of simple in structure, reasonable in design, safe and reliable, easy to maintenance, in light weight, no walking beam; Two, the oil pumper energy consumption is low, and the counter weight construction gross weight has only 50% of sucker rod load, and all movable connection structures adopt all that sliding bearing is hinged to make that frictional force is very little, and motor-driven only needs very little pulling force can drag sucker rod, saves electric energy more than 90%; Three, save raw material, the utility model does not have walking beam, no horse head, and balancing weight can be selected cement block for use according to operating mode, and counterweight double as transmission mechanism, and is in light weight, saves steel more than 40%; Four, stroke is big, and three grades of rhombus drive links can make stroke reach 9～10 meters, and level Four rhombus drive link can make stroke reach more than 12 meters; Five, the acting of the utility model up-down stroke equates, balancing weight and extension spring make suspension point acceleration, speed and dynamic load reduce, the impact dorsad that reducer gear is produced reduces simultaneously, and the torque characteristics that oil pumper part throttle characteristics and asynchronous motor are hard matches each other, and motor effect height, moment of torsion are little; Six, compliance is strong, the utility model is suitable for the needs that recover the oil under various weathers, geography and the geological tectonic conditions, be fit to the needs that various composition oil extract, the needs that suitable hyposmosis, big stroke, deep-well, viscous crude, low energy, economize on electricity, saving steel carry out oil exploitation.

Description of drawings

Fig. 1 is the utility model structural representation;

The specific embodiment

Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail.

As shown in Figure 1, the utility model support 14 lower end parts are connected on the base 17, on the base 17 in support 14 frames motor 1 is housed, join by belt gear 19 and reducer 2, variable crank 3 on reducer 2 output shafts links to each other with grooved slide block 5 by connecting rod 4, grooved slide block 5 both sides are provided with guide bearing 6 and link to each other with multistage four jointed gear units 8 through pull bar 7, multiple tracks extension spring 9 is equipped with at position, multistage four jointed gear units, 8 upper end, multiple tracks extension spring 9 other ends join with the spring fixed bar 10 that is fixed on movable pulley 12 pole upper and lower settings respectively, both sides, position, support 14 top have symmetrical weighting distribution wheel 11 and fixed pulley 13, two to link to each other with counterweight 18 with polished rod load 16 respectively by counterweight rope 15 between taking turns.

The utility model the utility model scissors connecting rod does not have one of beam oil pumper operating principle, according to the assembly pulley principle, when lifting or decline movable pulley 12 are h rice, then be wrapped in chain 20 on the fixed pulley 13 2h rice that just can descend and reach the purpose that increases stroke, three grades of rhombus drive link structures of this device design, its theoretical elongation can reach 3 times of single rhombus long-diagonal, adjusts drive link, promptly adjusts the rhombus length of side and can realize long stroke calmly; Two of operating principle, according to lever principle, the central point of I and II drive link is respectively the I and II sliding bearing, just the fulcrum of lever is just in the middle of force and emphasis, left and right pull bar is added in the thrust in force and has changed the direction of power at the gravity that emphasis forms, but equal and opposite in direction is because connection between the drive link and the sliding bearing frictional force that is located in the guide slot are minimum, so transmission mechanism is very easily realized; Three of operating principle, according to rhombus diagonal principle, when rhombus vertically slided into maximum to angular vertex up and down in guide slot, its diagonal was similar to two length of side sums, and this device is owing to be the machinery combination, its long-diagonal can reach 70% of two length of side sums, if the rhombus length of side is 1 meter, then the diagonal angle line length is 1.40 meters, and three grades of drive links then are 4.20 meters, add 1 meter that grooved slide block 5 and upper and lower connecting rod slide separately, the stroke of this device can reach 10.40 meters; Four of operating principle is according to Hooke's law " spring is under elastic deformation, and the elastic force of spring is directly proportional with the elongation of spring (or compression) ".The utility model scissors connecting rod does not have the beam oil pumper and designed extension spring in parallel, its design formulas: in the F=Kx formula, K is stiffness factor (coefficient of stiffiness), and x is the elongation (or shortening) of spring, the K of extension spring in parallel _Always=k1+k2+k3+k4 selects certain extension spring can calculate the size of tensile force f.It is inelastic that the utility model scissors connecting rod does not have the extension spring when static balance of beam oil pumper, when the dynamic equilibrium down stroke, the mechanical pulling force that spring is subjected to the release of sucker rod whereabouts draws back the spring storage power, release energy when treating upstroke with pulling sucker rod load, make up-down stroke acting balance, oil pumper suspension point acceleration and polished rod load 16 both can have been cushioned, reduce polished rod load 16 fluctuations, improve the degree of filling of pump, reduction is to the dorsad impact force of reducer gear because of produced by reversed load, thereby reduce the parts damage, safe and reliable to operation; Can also reduce output torque and root-mean-square value, improve the part throttle characteristics and the motor torque characteristic matching degree of oil pumper, and then improve the application life of oil pumper.

The routine that the utility model is different from traditional type fully has bar beam-pumping unit and no bar oil pumper, its implementation method: the one, adopt scissors link in rhomb form transmission and bearing hinge connection and slip, when at utmost reducing friction, obtain big stroke and improve tar productivity; The 2nd, adopt assembly pulley to reduce pulling force, finish bigger load acting with the smaller power motor, energy-saving and cost-reducing, economize on electricity is more than 90%; The 3rd, transmission mechanism double as balance weight mechanism does not have walking beam and horse head, saves steel more than 40%; The 4th, adopt extension spring in parallel to reduce suspension point acceleration and load fluctuation, the part throttle characteristics of oil pumper and motor torque characteristic are complementary, thereby improve the pumping unit system oil recovery efficiency.

Claims (1)

1. a scissors connecting rod does not have the beam oil pumper, comprise base (17), support (14), four jointed gear units (8), it is characterized in that: support (14) lower end part is connected on the base (17), on the base (17) in support (14) frame motor (1) is housed, join by belt gear (19) and reducer (2), variable crank (3) on reducer (2) output shaft links to each other with grooved slide block (5) by connecting rod (4), grooved slide block (5) both sides are provided with guide bearing (6) and link to each other with multistage four jointed gear units (8) through pull bar (7), multiple tracks extension spring (9) is equipped with at position, multistage four jointed gear units (8) upper end, multiple tracks extension spring (9) other end joins with the spring fixed bar (10) that is fixed on the setting of movable pulley (12) pole upper and lower respectively, there are symmetrical weighting distribution wheel (11) and fixed pulley (13) in both sides, support (14) position, top, and two link to each other with counterweight (18) with polished rod load (16) respectively by counterweight rope (15) between taking turns.

Images