CN1004294B - Long stroke pumping unit - Google Patents
Long stroke pumping unit Download PDFInfo
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- CN1004294B CN1004294B CN85103185.4A CN85103185A CN1004294B CN 1004294 B CN1004294 B CN 1004294B CN 85103185 A CN85103185 A CN 85103185A CN 1004294 B CN1004294 B CN 1004294B
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- pulley
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- pylon
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Abstract
The present invention relates to a long stroke oil pumping machine which comprises a tower frame which stands on a base, and counterweight-polished rod systems which cross both sides of a large head sheave on the top of the tower frame. The oil pumping machine uses a motor as a power source. The motor rotate in a constant direction, generates reciprocating linear movement which is approximate to be simple and harmonic rules through a set of crank connecting rod mechanism, amplifies the reciprocating movement stroke through a mechanism which is composed of a fixed pulley block and a movable pulley block, and transfers the amplified reciprocating movement stroke to the counterweight-polished rod systems. A long stroke length can be conveniently realized by altering a crank working length. The number of pulleys which participate in work can be altered so that the stroke length can be altered in a large range.
Description
The present invention and long stroke pumping unit, it is relevant particularly not have the beam type long stroke pumping unit.
In oil exploitation, for those can not blowing oil well, mainly use oil pumper from wherein extracting crude oil.Along with the passing of exploitation time, the oil well liquid level of old filed constantly descends and needs exploitation to contain than the oil in the deep stratum, requires the following pump degree of depth of oil pumper constantly to increase, thereby has produced new technical barrier.At first be the pump efficiency problem,, under deadweight and loading, will produce elastic elongation because be elastic body with metal sucker rod.When sucker rod was up and down reciprocatingly worked, this elastic elongation can cause loss of plunger stroke.The following pump degree of depth is big more, and the effective stroke loss is then big more, the oily efficient of pump is also low more.Yet if strengthen the driving stroke of oil pumper, loss of plunger stroke will reduce relatively.Therefore this occasion more satisfactory be to use long stroke pumping unit as far as possible.In addition, for the exploitation in highly aqueous field and high viscosity oil field, strengthen the oil pumper stroke effect also fine.Under the same displacement condition, the stroke that increases oil pumper means can correspondingly reduce strokes per minute, speed and acceleration, and this has produced many other benefits again.At first, because sucker rod is to work under changing load, its fatigue life is relevant with the stress-number of cycles that is experienced, reduce strokes per minute mean reduce certain during in stress-number of cycles, increased the fatigue life of sucker rod.In addition, underspeed and the acceleration wearing and tearing that help to slow down sucker rod and cylinder barrel, and stroke strengthens, and makes again the wearing and tearing of cylinder barrel inner surface be dispersed on the bigger area, rather than concentrate on a less zone that this also helps to prolong the application life of cylinder barrel.In brief, increase stroke, can improve volumetric efficiency and prolong part application life.
Long stroke pumping unit can be divided into two big classes by its structure, i.e. beam type and no beam type.The beam type long stroke pumping unit, wherein a kind ofly see United States Patent (USP) 4,306, No. 463, have a hinged walking beam that on derrick post, can freely swing, an end of beam has balance weight, the other end has a horse head, polished rod connects with horse head by rope, by motor or hydraulic mechanism walking beam is swung up and down, and moves up and down thereby drive polished rod.The shortcoming of beam pumping unit is that structure is compact inadequately, heavy, floor space is bigger, and the spin balancing piece produces bigger centrifugal force etc.
No beam type long stroke pumping unit generally all has a upright pylon, tower top has a rotating wheel, the rope of binding polished rod or belt are taken turns on one side from this and are hung down, on rope that the another side of trailing wheel hangs down or the belt weight equalizer is installed, the capstan by motor or fluid motor-driven drives the polished rod motion directly or indirectly.The commutation of stroke realizes by motor or hydraulic motor backward rotation.Deceleration during near the stroke end points or buffering also realize by electric or hydraulic control.
United States Patent (USP) 3,285,081 has shown a kind of no beam type long stroke pumping unit, it comprises a pylon, be fixed on the drum on pylon top, hanging the balance weight and the bar rope that move in opposite directions on the drum, the drive unit that makes the forward and reverse rotation of drum by one can forward and reverse rotation motor and the rope of reducer and connection reducer output shaft and drum form.Its length of stroke depends on the number of turns that motor turns in this one-stroke, and deceleration and buffering when the commutation of polished rod up-down stroke and commutation realize by synchronous direct current generator.
United States Patent (USP) 4,388,837 disclose a kind of safety device that is used for the belt-type long stroke pumping unit.It comprises that is arranged on the clamping device of tower top between balance weight and big head sheave, and the belt that connects polished rod and balance weight passes from this clamping device.When the fracture of polished rod or bar side belt, clamping device can be clamped the belt of balance weight top automatically, thereby prevents weight equalizer from falling and cause the accident.Its shortcoming is, this safety device is not suitable for the oil pumper that adopts wire rope to connect polished rod and balance weight, and the actual at present most oil pumpers that use all adopt intensity, life-span etc. all considerably beyond the wire rope of belt.And if during the somewhere of instantaneous fracture place of belt between clamping device and balance weight, this safety device can't stop balance weight to be fallen.
The type of drive that is adopted in existing no beam type long stroke pumping unit or synchronously direct current generator and complicated solid electronic control system perhaps adopt at a slow speed the hydraulic power unit to realize break-in campaign and control dynamic loading.Owing to used complicated, expensive, tender and lovely relatively electronics, hydraulic test, under the situation of working for a long time, damaged, be difficult to maintenance in the open air easily.
The purpose of this invention is to provide a kind of complete novelty, simple in structure, easy to operate, for ease of maintenaince, take up an area of less, cost is low, the no beam type long stroke pumping unit of reliable operation.
Another object of the present invention provides a kind of safety device that long stroke pumping unit adopted by manufacturing of the present invention.In case some component wear of oil pumper, this device can be made corresponding reaction at once, protects whole oil pumper.For example, polished rod or connect polished rod and during the wire cable rupture of balance weight, safety device should move at once and stop weight-balancing device because self gravitation effect and falling downwards, and cut off the electricity supply simultaneously machine is shut down, and prevent to produce further destruction; Perhaps cut off the electricity supply rapidly during too loose or fracture when the wire rope of stroke enlarger, the protection oil pumper is not damaged.
A further object of the invention provides and a kind ofly can make the tight rope device that keeps certain tension force by the wire rope of the stroke enlarger in the long stroke pumping unit of manufacturing of the present invention.Because only remain certain tensile force, just can guarantee exactly the linear reciprocating motion of the approximate simple harmonic quantity of drag link generation to be amplified and transmit this moving along both direction.
The present invention has a purpose to provide the card rope device that long stroke pumping unit of the present invention uses again.The card rope device is installed on the balance weight dolly, tightly blocks the suitable part of stroke enlarger wire rope, guarantees that polished rod moves up and down according to the motion of the approximate simple harmonic quantity rule of previous mechanism generation.
Above purpose of the present invention realizes by following technical measures:
Make a no beam type long stroke pumping unit, it comprises: a base, one is vertically mounted on the base and the pylon that installs facing to well head its front, be fixed on the power source part of forming by motor and reducer on the base, produce the device of linear reciprocating motion, be installed in the big head sheave of tower top and be connected the balance sysmte that constitutes with weight-balancing device by first safety device that polished rod eye is connected with polished rod, the other end works through excessive polished rod or when connecting the wire cable rupture of polished rod by flexible rigging one end that strides across big head sheave, wherein:
Motor is fixed on the posterolateral base of pylon, and reducer is fixed on the interior base of pylon, and its output shaft is protruding from the pylon both sides, and this motor is connected by belt transmission with this reducer;
The device of above-mentioned generation linear reciprocating motion comprises that a pair of crank-link mechanism that is arranged symmetrically in pylon both sides outsides can move up and down with one in pylon and the transverse arm that the pylon both sides are connected with connecting rod in this crank-link mechanism is stretched out at its two ends, and this crank is connected with the two ends of reducer output shaft respectively;
One is installed in pylon inside, is wrapped in the stroke enlarger that the wire rope on these assembly pulleys is formed by fixed block group and movable sheave group and one by certain way, and the end of this wire rope is connected with the base type pylon by euphroe.
Above-mentioned flexible rigging is a wire rope;
Be fixed on the rope locking machine on the weight-balancing device, the suitable part between upper and lower, fixed block group of wire rope links together in it and the above-mentioned stroke enlarger, in the stroke movement of polished rod, this rope locking machine should remain between the upper and lower fixed block group and move;
Above-mentioned first safety device connects and motion with above-mentioned weight-balancing device, it has two spring controlled arrestment mechanisms, when polished rod or when connecting the wire cable rupture of polished rod, the position during position when this weight-balancing device accident that remains on substantially takes place this arrestment mechanism also cuts off the oil pumper power supply.
Second safety device too loose when stroke enlarger wire rope or fracture the time is worked;
Big head sheave with stride across the wire rope of big head sheave in a certain position relative fixed.
Stroke enlarger among the present invention reaches the wire rope that twines by certain way by running block, fixed block group and forms between them.Specifically, there is one to be fixed on pylon inside, the following fixed block group of reducer top, the coaxial mounted pulley that can rotate respectively more than two is wherein arranged, also have one to be fixed on the interior last fixed block group of pylon near the top, comprise coaxial installation more than two, the pulley that can rotate respectively, its number is identical with pulley number in the following fixed block group, and one can be last, the movable pulley combination that moves back and forth between the following fixed block group with being directed to, it comprises two groups of pulleys, form by the pulley that can rotate independently more than two for every group, its number and last, pulley number in the following fixed block group equates, this movable pulley combination is connected rotationally with transverse arm, can be wrapped in successively across on each pulley in a certain way with steel cable, thereby but three assembly pulleys are connected into the stroke enlarger of a bi-directional power, be characterized in: if straight-line displacement S of input on the follow-up pulley built up frame
0, then with wire rope on part between the upper and lower fixed block group straight-line displacement of certain parts that a bit are connected be 2nS
0, (wherein n is last or the following pulley number in the fixed block group) thus make stroke obtain amplifying.
In the accompanying drawings, the structure of specific embodiment according to the invention is disclosed, wherein:
Fig. 1 is the side schematic view of this oil pumper;
Fig. 2 is the principle schematic of stroke enlarger among the present invention;
Fig. 3 is the principle schematic of stroke enlarger in the specific embodiment of the present invention;
Fig. 4 is that the another kind of stroke enlarger among the present invention is arranged principle schematic;
Fig. 5 is the schematic diagram of euphroe;
Fig. 6 is the phantom drawing of rope locking machine;
Fig. 7 is the phantom drawing of balance weight dolly and safety device;
Fig. 8 has shown movable pulley combination in the stroke enlarger shown in Figure 3;
Fig. 9 is mounted in the schematic diagram of the release mechanism on the balance weight dolly;
Figure 10 has shown the structure of big head sheave;
Figure 11 is the phantom drawing of polished rod eye;
Figure 12 has shown the slot part structure of stroke enlarger middle pulley;
Figure 13 is mounted in the scheme of installation of the safety device in the stroke enlarger.
Now, referring to accompanying drawing, multiple-speed motor (101) is housed on the base of long stroke pumping unit (100), drive reducer (102) with output shafts by belt transmission, pylon (20) is vertically mounted on the base (100), reducer (102) comprises that brake gear is positioned on the base of pylon bottom, and its output shaft that stretches out from both sides (102a) stretches out near the bottom from the pylon both sides respectively.Pylon (20) is along pylon three (except that back) operating platform (201) of being with guardrail to be housed near the tower top place by the elongated cube frame that four root posts and reinforcement gusset are welded, can use for the maintenance and debugging personnel, the front portion of platform is hinged, can upwards dig in case of necessity and abdicate the well workover space.The staircase at top in addition can go directly in both sides on the pylon.The pylon top is installed with rotary big head sheave (30), and counterweight block (401) is placed on balance weight dolly (40) lining.This balance weight dolly can be along rear rail (202) vertical up-or-down movement that is installed on the pylon rear column, and connects with the polished rod eye (120) and the polished rod (110) of pylon front by the wire rope (14) that strides across big head sheave, constitutes balance sysmte.There is the balance weight of the various weight of a cover to make up for any.The selection principle of counterpoise is, makes the gross weight that is suspended in wire rope (14) rear end be a bit larger tham the gross weight of the weight that the wire rope front end hangs, and its difference is preferably 1/2nd of oil column weight.In other words, the balance weight dolly adds that the gross weight of weight equalizer piece should add the weight of weight sum more than half oil column of rod string in oil than polished rod eye.Displacement leading screw (303) rotational lead screw (303) is equipped with in bearing (301) bottom of big head sheave (30) can make big head sheave move forward and backward.
The stroke enlarger of being made up of last fixed block group (51), following fixed block group (53) and movable sheave group (55) (50) is installed between pylon inner tip and the lower end.These three assembly pulleys are linked up in a certain way by steel cable (57).Running block is connected with the transverse arm (61) of crank-link mechanism (60), two cranks (63) are installed in respectively on the reducer output shaft two ends of stretching out to both sides from the pylon bottom, two cranks remain parallel, connecting rod (65) one ends are hinged on the crank, and the other end is hinged respectively with the two ends of the transverse arm (61) that the rectangle window of reserving from the pylon two sides stretches out.Roller (559) is housed on the framework of running block (551), and this assembly pulley can slide on the fromer rail (203) of pylon vertically.The rope locking machine (41) that is installed on the balance weight dolly in position blocks the part (57a) of wire rope (57) between upper and lower fixed block group.Like this, when the motor perseverance when rotating, just can drive polished rod and pump as long stroke.The polished rod strokes per minute changes and can realize by changing motor speed and belt pulley gear ratio.Length of stroke is regulated and can be realized by the mode that changes connecting rod (65) and crank (63) link position.If the pulley number of selecting to have the assembly pulley of different pulley numbers or changing the work that participates in the assembly pulley then can change stroke of polished rod length in a wider context.When oil pumper starts, should make crank be in the plumb position.
The schematic diagram of the stroke enlarger that Fig. 2 is made up of assembly pulley.By four assembly pulley A, B, C and D that are made up of same quantity pulley, each pulley axis is parallel to each other, and wherein C and D are the fixed pulley groups, and A and B are running blocks, and they join together and can move between C and D.Steel cable links together these assembly pulleys in the following manner: wire rope one end is fixed, and the other end is walked around the pulley a on the A group earlier
1, walk around the pulley c in the C group then
1, return A
*Walk around the pulley a in the A group after the group
2, and then return assembly pulley C and walk around pulley c
2, so continue until last pulley c on intact C group
nInto fixed block group D is guided wire rope in the back, walks around pulley d
nAfter guide assembly pulley B again into, walk around pulley b
n, return fixed pulley group D then and walk around pulley d
N-1, so continue until wire rope at last around the pulley b that finishes assembly pulley B
1After, wire rope is tightened the back fix.During winding, each section of wire rope crossed one another, in order to avoid increase the resistance of motion and wire rope abrasion.Obviously, in this mechanism that forms by assembly pulley, if running block A and B move a bit of apart from S to a certain direction (such as to the right) together
0, then the total length of each section silk rope between assembly pulley A and the C has increased 2nS
0, and the quantity that the total length of the wire rope between assembly pulley B and the D shortens also equals 2nS just
0Like this, extra wire rope has replenished the length of the required increase of wire rope between assembly pulley A and the C just between assembly pulley B and the D.Otherwise, when running block A and B are moved to the left apart from S
0The time, the variable quantity of wire rope total length also is 2nS between assembly pulley A and C and assembly pulley B and the D
0, only in this case, wire rope total length between assembly pulley A and the C reduce and between assembly pulley B and the D total length of wire rope increased.Therefore, at running block displacement S
0After, between assembly pulley C and D, more precisely be positioned at pulley c
nAnd d
nBetween wire rope part (P) the displacement S that goes up any point (K) be S
02n doubly, i.e. S=2nS
0Obviously, if with on (P) section of wire rope certain a bit (K) go to affect other can reciprocating object, then the stroke of this object also is input displacement S
02n doubly.Like this, we have obtained a stroke enlarger, it can be enlarged into original 2n to the input straight-line displacement doubly.An important feature of this enlarger by the wire rope transmission is can be in transferring power on the reciprocal both direction, and not as wire rope mechanism transferring power like that in one direction.
Fig. 3 is the schematic diagram of a kind of arrangement mode of each assembly pulley in the aforesaid stroke enlarger that adopts in the long stroke pumping unit made in accordance with the present invention.The working sheave number is 2 in each pulley, so multiplication factor is 4.The downslide wheels (53) that are fixed on reducer top in the pylon comprise one in order to the downslide wheels are fixed on bearing (531) and two pulleys (533 that are enclosed within on the axle (532) that is installed on the bearing on the pylon, 534) independent rotation can be distinguished in pulley (533) and (534), wherein the pulley that diameter is bigger (533) is located substantially in the median plane of pylon, and the less pulley (534) of another diameter is amesiality.Top sheave group (51) is fixed on the interior top of pylon by its bearing (511), be fixed on two pulleys (513) and (514) and a directive wheel (515) have been installed on the pulley spindle (512) on the bearing (511), they all can be on axle independent rotation, the diameter of its middle pulley (513) is big and identical with large pulley (533) diameter in the downslide wheels (53), it also is located substantially in the tower center face, and the pulley of another biasing (514) diameter is identical with pulley (534) diameter.Directive wheel (515) is installed in the outside of pulley (514).Can comprise framework (551) along the movable pulley combination (55) that fromer rail on the pylon (203) moves back and forth between last fixed block group (51) and following fixed block group (53), the pulley spindle of two installations parallel to each other (552) and (553), but overlapping the pulley (554 of two independent rotation on every axle respectively, 555,556,557), their diameter and last, the less pulley (514) of diameter is identical with the diameter of (534) in the following fixed block group, two pulleys (554) on its axis (552), (555) basically with last fixed block group in two pulleys (513) and (514) aim at two pulleys (556) of axle on (553) respectively, (557) basically with two pulleys (533) of downslide wheels, (534) aim at respectively.These four pulley spindles (512,532,552,553) and reducer (102) output shaft keeping parallelism and coplane.Wire rope (57) one ends are fixed on the base by euphroe (501), walk around all pulleys (557), (534), (556), (533), (513), (554), (514), (555) in the mechanism successively in foregoing mode then, walk around directive wheel then and also be fixed on the pylon by another euphroe (502).The diameter of pulley (513) and (533) is more greatly in order to prevent the mutual friction and connect for rope locking machine with wire rope and reserve enough spaces mutually of each section of wire rope.On the framework (551) of movable pulley combination some rollers are housed, the framework of their bootable movable pulley combinations moves in the fromer rail on pylon.Framework (551) is connected with transverse arm (61) by self-aligning spherical support.The wire rope friction is decreased and the reduction noise in order to reduce, and each pulley slot part has all been inlayed a circle oil resistant rubber (590), as shown in figure 12.
Fig. 4 is the scheme that the another kind of each assembly pulley arrangement mode in the stroke enlarger can be taked.Its multiplication factor also is 4.Except the arrangement mode of movable pulley combination middle pulley group middle pulley was different with foregoing (Fig. 3) embodiment, the remainder feature of these two kinds of schemes was identical, has therefore adopted identical reference number.In this programme, the pulley that four diameters are identical in the movable pulley combination (554 ', 555 ', 556 ', 557 ') be arranged on the axle.But they are independent rotation all, and aims at the pulley of going up in fixed block group and the following fixed block group respectively, and the canoe of wire rope is also identical.
Pulley in the assembly pulley can also have other arrangement scheme.
Tight rope device (501), (502) as shown in Figure 5, are installed in and stop among the journey enlarger, and it can make wire rope (57) keep certain tensile force, and can absorbing vibration.It is made up of truckle (701), cannulated sleeve (702), hollow draw-bar (703), end face bearing (704), compression spring (705), locking nut (706), adjusting screw(rod) (707), bearing (708) and hollow sleeve cover (709).
Cannulated sleeve (702) is a band bore hole and cylindrical sleeve end sealing, has on its blind end along the outwardly directed ear seat of sleeve direction of axis line, and openend has internal thread.Hollow draw-bar (703) is the elongate rod of a hollow, and the one end has cylindrical flange, on the bar other end inner surface screw thread is arranged.Flange can slide in the bore hole of cannulated sleeve.
Truckle (701) is hinged on the ear seat of cannulated sleeve (702), the flanged (FLGD) end of hollow draw-bar (703) is put into sleeve (702), stretch out the concentric circle holes of the other end on this socket cover (709) by the tail end screw thread and be connected with adjusting screw(rod) (707) on being hinged on drag link bearing, end face bearing (704) and compression spring (705) are contained in this cannulated sleeve and are enclosed within on the hollow draw-bar (703), an end face of this bearing leans against on the flange, the other end contacts with compression spring (705), and this spring other end withstands on the inner face of socket cover.Wire rope one end of stroke enlarger is enclosed within truckle (701) and goes up and fix, and drag link bearing (708) is fixed on base or the pylon.Rotation hollow draw-bar (703) regulates the tight power of giving in the wire rope, locking nut (706) locking then.
Crank-link mechanism is arranged symmetrically in the bottom outside the pylon two sides, is connected with reducer output shaft by key.Their plane of movement is parallel with the median plane of pylon.Each crank-link mechanism is made up of a crank and a connecting rod, the two ends of transverse arm (61) respectively with two rod hinge connections.The installing hole that crank body (63) cooperates with reducer output shaft obtains torque by key joint from reducer output shaft near an end of crank body, two cranks remain parallel when rotating.Away from an end of installing hole one row's pin-and-hole is arranged on the crank body, select for use when promptly changing stroke of polished rod for the active length that changes crank, the center line of this row's pin-and-hole and the center line of installing hole are parallel to each other and all be positioned at the center plane of symmetry of crank body.Connecting rod (65) is the elongate rod with circular cross-section, and amplify at the two ends of bar, and every end has a through hole, the center line in two holes vertical mutually.Transverse arm (61) is an elongated thin wall construction with square-section, its middle part has a bearing that raises up to link to each other with movable pulley combination framework by spherical bearing, stretch out the rectangle fenestra from the pylon two sides respectively at the two ends of transverse arm, symmetry has vertical U-shaped breach on its end face, on the breach wall cross through hole is arranged.One end of connecting rod (65) stretches among the breach of a certain end of transverse arm and is enclosed within rotationally on the bearing pin that is fixed between the breach wall, and the other end is connected with certain pin-and-hole on the crank body by bearing pin.
The stroke enlarger is connected with balance weight one polished rod system by rope locking machine.Rope locking machine as shown in Figure 6, comprise rope locking machine mount pad (410), two clamping plate (411), (412), one of them clamping plate (411) are fixed together with mount pad (410), another piece clamping plate (412) removably use bolt (414) to connect with strap (411), have the horizontal key (415) that embeds second splint respectively to bear the shearing of vertical direction between two clamping plate.Be embedded with the fixture blocks (416) of the band tooth line on some outstanding these planes on two clamping plate on the relative plane respectively, in its tooth line direction and the wire rope each strand turn round around direction consistent.The rope locking machine mount pad is fixed by bolts on the balance weight dolly (40), the P section of the wire rope of the said stroke enlarger in front is passed in the middle of being embedded in the fixture block on the second splint, tight a bolt (414), just wire rope and rope locking machine seat and balance weight dolly are firmly connected together.Like this, behind the motor start-up of long stroke pumping unit, motion just is passed to balance weight-polished rod system.
Weight-balancing device as shown in Figure 7, is made up of balance weight dolly (40) and release mechanism (45) and the counterweight block (401) that is placed in the balance weight dolly.The shape of balance weight dolly resembles the square box of a uncovered, and two middle side edge of box have vertical column (402) column top that one amplifier section is arranged, and have rectangular hole on it.The steamboat (405) that stretches in rear rail on the pylon (202) groove is equipped with in the both sides of balance weight dolly, and rope locking machine (41) is installed on the front of dolly.Dolly is connected with wire rope with polished rod (112) with the polished rod eye (120) of big head sheave (30) opposite side by the release mechanism (45) that stretches in its two heel posts top slot.Counterweight block is placed in the dolly, counterpoise is decided on the load of uphole end, the weight series of balance weight is respectively 3 tons, 2 tons, 1 ton, half ton and 10 kilograms, therefore can adjust counterpoise at any time exactly, make bascule, comprise release mechanism, weight ratio big head sheave opposite side polished rod eye and the weight of weight sum heavily about half oil column of sucker rod in oil.Like this, the size of required tractive force all is substantially equal to the weight of half oil column during upper and lower stroke, makes the duty ratio of motor more even.
Fromer rail on the pylon (203) and rear rail (202) all are dismountable, are convenient to adjust and maintenance.Fromer rail is made up of two channel steel shape elements, is installed in abreast respectively on the pylon front column, and its groove face opening is relative, as shown in Figure 8.Rear rail is installed in respectively on the pylon rear column back by two i iron or channel-section steel, and the web of two i iron is parallel to each other.Respectively have the slotted hole that a row arranges along its length on their the web center line, as shown in Figure 9.
Safety device among the present invention has two covers, and a cover is installed in the balance weight one polished rod system another set of being installed in the stroke enlarger.As shown in Figure 9, be installed in safety device (45) in the balance weight one polished rod system between two root posts of balance weight dolly.It comprises its end face central authorities the crossbeam of one vertical through hole is arranged and be installed in this crossbeam through hole and crossbeam below safety pin ejecting mechanism (46).Crossbeam is placed in the middle of balance weight dolly two root posts, and its two ends are stretched in the slot in the amplifier section of column top, and two suitable block rubbers (47) of thickness are clipped between the end face of crossbeam end face and column top slot.Make between the top of slot on the end face of crossbeam and the column and keep certain distance.The safety pin ejecting mechanism comprises the safety pin that is configured in the cinclides of crossbeam both sides and controls the leverage that safety pin ejects, it comprises that one one end has the push rod (451) greater than the flange of crossbeam end face central vertical through-hole diameter, protrusion (452) with the axis parallel of bar is arranged on the outer face of this flange, the other end of this push rod has the means that are connected with a truckle, spring (453), (454), (455), tegillum (456) and lever (457).Push rod (451) does not have an end of flange to be upward through the through hole at crossbeam middle part, overlapping compression spring (453) on the bar, one end of spring is pressed on the flange, the other end withstands on the lid (456) that covers on the through hole of crossbeam middle part, the elastic force of spring makes push rod that the trend of downward motion be arranged, the upper end of stretching out of bar and truckle (458) are hinged, walk around truckle (458) from the wire rope that big head sheave (30) is got off.Keep in touch the rear end of the protrusion of push rod bottom and lever (457), and the middle part of lever (457) is hinged on crossbeam, and its front end has a claw to lower convexity.During operate as normal, act on making a concerted effort that lever rear end makes it to move downward much smaller than the elastic force of compression spring (454), it imbeds claw to stop safety pin outwards to eject in the translot on the safety pin (459), the protrusion of lever rear end and push rod lower end is kept in touch.Safety pin (459) is gone up the big leading portion of diameter and is placed on slidably in the hole of beam side wall, and there is a translot at its rear portion, and the axial line of this pin is just in time aimed at the line of centres of the slotted hole on the rear rail on the pylon (202).The thinner afterbody of safety pin (459) diameter has screw thread, and compression spring (455) is enclosed within on the thinner part of diameter of safety pin, and an end withstands on the shoulder at safety pin middle part, and the other end withstands on the crossbeam, and this spring makes pin that the trend of outside ejection be arranged.Nut (460) can limit the distance that safety pin outwards ejects.Have V-shaped groove on the big end end face of safety pin, during installation, make V-shaped groove keep vertical direction.
During the oil pumper operate as normal, striding across the resistance that the pulling force in the wire rope of big head sheave makes the flange of push rod (451) overcome spring (453) withstands on the soffit of crossbeam, spring (454) is stuck in the translot of safety pin (459) claw of lever (457), thereby makes safety pin remain on " withdrawal " state.In case polished rod or wire cable rupture, tension force in the wire rope is die-offed, the elastic force that is enclosed within the compression spring on the push rod (451) is greater than the tension force in the wire rope, promptly promoting push rod (451) moves downward, and then promotion lever (457) makes its front end claw perk, decontrol safety pin (459), safety pin (459) makes the braking of balance weight dolly, stops it to fall in rapid certain slotted hole on both sides ejection and insertion pylon rear rail under spring (455) effect.The kinetic energy of dolly absorbs by damping rubber block (47).Meanwhile, safety pin (459) also can be handled electric switch and cut off motor power, thereby whole oil pumper is protected.The mechanism design of cutting off the electricity supply gets not only simply but also is ingenious, it comprises that vertically is tightened in the wire on the rear rail medial surface (480) on the pylon, the central lines of its position and slotted hole, the upper end of wire is fixed, and the lower end links to each other with an electric interlock switch (not shown).When the outside At time of eject of safety pin (459), before slotted hole on the insertion rear rail, at first cut off this wire (480), thereby make the interlocking switch action cut off motor power.V-shaped groove on the safety pin can prevent that wire is partially sliding.
Another set of safety device shown in Figure 13 can be cut off the electricity supply at the wire cable rupture of stroke enlarger or when too loose.It comprises a collision block (851) on the cannulated sleeve (702) that is installed in euphroe (501) or (502), this collision block (851) can move with cannulated sleeve (702), with leverage or other a mechanism's (not shown) that is installed in appropriate location on the oil pumper, this mechanism's controllable power switch cuts out.When the wire rope of stroke enlarger during too loose or fracture, cannulated sleeve (702) closes leverage control power switch to the collision block that the motion of drag link bearing (708) direction and sleeve move together under the effect of spring (705).The collision block that is installed on the cannulated sleeve also can directly be controlled motor switch.Before narrated, euphroe can make in the wire rope in the stroke enlarger and keep certain tensioning.When wire rope has smallly when loose, the spring in the euphroe promotes cannulated sleeve (702) and moves, thereby makes wire rope continue tensioning and keep certain tension force.In too loose or when fracture when wire rope, the displacement of cannulated sleeve increases, and suitably adjusts the mutual alignment of collision block and switch (852) (or mechanism of gauge tap), makes that switch produces action in this case to close motor.Behind the dump, the stroke enlarger just rested on the residing at that time position, and balance weight one polished rod system also can rest on the residing at that time position automatically owing to self is in a basic balance, so entire machine all can be guaranteed safety.In general, the operator should note the tensioning degree of stroke enlarger wire rope, in time regulate tension force of steel wire.Such cover safety device has been arranged, though since workman's thin right general idea do not find wire rope too loose emit dangerous when continuing to start shooting, also can autostop with assurance safety.
Big head sheave (30) is the wheel of a band spoke as shown in figure 10, is installed in rotation on the bearing (301), and bearing (301) is installed on the tower top flat board.By screw mechanism (302) big head sheave (30) and bearing (301) thereof are moved before and after on this flat board, micro-adjusting mechanism (305) also can about adjust the position of big head sheave and bearing thereof.The wheel rim excircle was made flute profile in big day, along the circumferential direction was equipped with the fixedly through hole of wire rope pressing plate of plurality of rows on the big head sheave wheel face.The wire rope that connects balance weight dolly and polished rod eye and polished rod strides across big head sheave along race and also in position is pressed on the big head sheave with a pressing plate.Like this, when polished rod and balance weight dolly moved one on the other, big head sheave was affected forward or backward by wire rope and rotates.The installation site of pressing plate should be suitable, and when at midstroke, pressing plate should be in the peak place of big head sheave wheel face.
Polished rod eye (120) is the flexible link between weight-balancing device and polished rod as shown in figure 11, simultaneously can be for pump dynamograph is installed.Polished rod eye mainly comprises following part: upper body (121), having flat pattern, there is a fixedly through hole of polished rod in central authorities, and bilateral symmetry has two other through hole parallel with medium pore; The shape of lower body (122) and upper body (121) are basic identical, but thickness increases greatly, and three holes that through hole is aimed at respectively of three positions and upper body (121) are arranged on it, and there are two apertures the side for the pump dynamograph effect is installed; Two cylindrical shrouds (123) with round taper hole put on the end face of the less end of diameter in hole and have several the grooves that radially extend to outer rim, and groove bottom is low inside and high outside, is convenient to rainwater and flows down; After the wire rope that gets off from big head sheave passes the through hole of upper body (121) and lower body (122) both sides respectively, pass two thrust bearings again respectively, little stomidium from cover (123) penetrates again, pass from big end, then end is broken up the back and be cast into one with the zinc that melts, be shaped as truncated cone, match with the conical bore of cover (123).Also have two screw tops (125) to be screwed in the screw of lower body upper surface between upper body and the lower body, rotate jackscrew (125) and the upper body can be lifted, be convenient to install pump dynamograph and carry out indicator card mensuration.Polished rod is fixed in the hole of upper body central authorities after passing freely through the through hole of lower body central authorities.The zinc head of end of wire rope that passes freely through the side opening of lower body enters in the taper hole of cover (123), the upper surface of cover contacts with thrust bearing (126), the upper surface of bearing contacts with the lower surface of lower body, jackscrew (125) does not bear pressure at ordinary times, and (127 transmit the pressure between the upper and lower body by cover.Like this, when the resistance in the well is big, though polished rod and with it fixedly the all-in-one-piece upper body move downward and slow down, lower body and wire rope still can be by the normal speed declines of oil pumper, at this moment the distance between upper body and the lower body is bigger.Lower body is made and is increased the weight of, and can make wire rope keep tensile force like this, makes big head sheave be subjected to the enough moment of rotating forward all the time.Therefore, the wire rope in balance weight-polished rod system even the down-hole resistance increases, also can keep certain tension force when the polished rod decrease speed slows down no matter all can keep tensioning in upstroke during still in down stroke.This just can go out to jump out or big head sheave stall from big day race from being avoided wire rope.Gutter channel on the cover (123) can make discharges smoothly such as rainwater, prevents the end corrosion.Thrust bearing (126) can be avoided wire rope to reverse knotting and cause polished rod eye crooked, also can prevent the polished rod dropout.
Below contrast table help the good effect that illustrates that the present invention is obtained.Wherein the walking beam machine is the CYJ10-3-48B type beam pumping unit that widely adopts at present, and long stroke pumping unit is the long stroke pumping unit of making by the present invention.Test is successively used these two kinds of oil pumpers instead on a bite oil well and is carried out.
From above data as can be seen, this mouthful well is owing to adopted long stroke pumping unit of the present invention, and the stimulation fluids amount was 68.8 tons in average day, and volume increase crude oil was 10.6 tons in average day, and pump efficiency has improved 39.6%.And balance sysmte is careful adjust after, the current fluctuation value of motor is less than 2 amperes, and to general beam pumping unit, the current fluctuation value just is considered to satisfied less than 7 amperes.
In sum, because novel uniqueness of the present invention has many advantages:
1) obtains required long stroke easily, need not the motion that special and complicated apparatus can obtain favourable approximate simple harmonic quantity rule, therefore the long stroke that can realize ideal, low jig frequency, low acceleration, pump efficiency height, output height, the big discharge capacity that is particularly suitable for deep-well, viscous crude, high-water-cut oil-producing well is adopted by force;
2) owing to adopted pure mechanical drive mode, thus firm in structure, motion is reliable;
3) because the polished rod characteristics of motion is approximately harmonic motion, so steady during break-in, dynamic load is less;
4) simple in structure, be easy to adjustment, maintenance and manufacturing, lower, the good reliability of cost;
5) reducer etc. all is installed in bottom the pylon, so floor space is little;
6) centrifugal force that does not have the spin balancing piece to bring, except the little horizontal component that crank-link mechanism produces, all the other are vertical load, add former advantages, make the oil pumper by manufacturing of the present invention not only be suitable for the oil field, land but also be adapted at the marine flat use of closing.
Claims (32)
1, long stroke pumping unit, has a base, one is vertically mounted on the base and the pylon that installs facing to well head its front, be fixed on the power source part of forming by motor and reducer on the base, produce the device of linear reciprocating motion, be installed in the big head sheave of tower top and be connected the balance sysmte that constitutes with weight-balancing device by first safety device that polished rod eye is connected with polished rod, the other end works through excessive polished rod or when connecting the wire cable rupture of polished rod, it is characterized in that by flexible rigging one end that strides across big head sheave:
(1) motor is fixed on the posterolateral base of pylon, and reducer is fixed on the interior base of pylon, and its output shaft is protruding from the pylon both sides, and this motor is connected by belt transmission with this reducer;
(2) device of above-mentioned generation linear reciprocating motion comprises that a pair of crank-link mechanism that is arranged symmetrically in pylon both sides outsides can move up and down with one and the transverse arm that the pylon both sides are connected with connecting rod in this crank-link mechanism is stretched out at its two ends in pylon, and this crank is connected with the two ends of reducer output shaft respectively;
(3) one are installed in pylon inside, are wrapped in the stroke enlarger that the wire rope on these assembly pulleys is formed by fixed block group and movable sheave group and one by certain way, and the end of this wire rope is connected with base or pylon by euphroe.
(4) above-mentioned flexible rigging is a wire rope;
(5) be fixed on rope locking machine on the weight-balancing device, the suitable part between upper and lower fixed block group of wire rope links together in it and the above-mentioned stroke enlarger, in the stroke movement of polished rod, this rope locking machine should remain between the upper and lower fixed block group and move;
(6) above-mentioned first safety device connects and motion with above-mentioned weight-balancing device, it has two spring controlled arrestment mechanisms, when polished rod or when connecting the wire cable rupture of polished rod, the position during position when this weight-balancing device accident that remains on substantially takes place this arrestment mechanism also cuts off the oil pumper power supply.
(7) or second safety device that fracture time work too loose when stroke enlarger wire rope.
(8) big head sheave with stride across the wire rope of big head sheave in a certain position relative fixed.
2, long stroke pumping unit as claimed in claim 1 is characterized in that, stroke enlarger wherein comprises:
(1) following fixed block group that is fixed on reducer top in bottom in the pylon has the pulley that can rotate respectively more than two in this assembly pulley, the pivot center of pulley is substantially parallel with above-mentioned reducer output shaft;
(2) one are fixed on the interior last fixed block group near top end of pylon, but the pulley that comprises independent rotation more than two, the number of pulley equates with pulley number in the following fixed block group, and the output axis of the axis of each pulley and reducer is substantially parallel in the axis of pulley and the following fixed block group;
(3) one in pylon can up and down between the fixed block group along being installed in the movable pulley combination that the vertical guide rail on the pylon moves up and down, comprise two groups of pulleys, but every group of pulley by independent rotation more than two formed, two groups pulley number equate and equal or time fixed block group in the pulley number, each pulley axis and reducer output shaft are substantially parallel in the axial line of each pulley and said fixing assembly pulley and the following fixed block group, and the framework that this movable pulley makes up connects with above-mentioned transverse arm by spherical bearing;
(4) steel cable is not wrapped on each pulley in a certain way across successively, but upper and lower, fixed block group and movable pulley combination are connected into the stroke enlarger of a bi-directional power, and the characteristics of this mechanism are: if less straight-line displacement S of input on the follow-up pulley built up frame
0, then with the output shift quantity (S) of certain parts that a bit are connected is scalable on part between the upper and lower fixed block group is input displacement S on the wire rope
02n doubly, i.e. S=2nS
0, wherein n is the pulley number that adopts in the last or following fixed block group, also equals half of movable pulley combination middle pulley sum.
3, long stroke pumping unit as claimed in claim 2 is characterized in that, stroke enlarger wherein comprises:
Be fixed on the following fixed block group of reducer top in the pylon, it comprises one in order to the downslide wheels are fixed on the bearing on the pylon, be fixedly mounted on this bearing and parallel with reducer output shaft and at the downslide wheel shaft of same vertical guide, one is enclosed within large pulley free to rotate on this pulley spindle, its axial location is basically in the tower center face, another is enclosed within the less pulley of diameter free to rotate on this pulley spindle, and its axial location is amesiality slightly;
Be installed in the last fixed block group on top in the pylon, comprise one in order to this fixed block group is fixed to the bearing on the pylon, be fixedly mounted on this bearing and the top sheave axle of and coplane parallel with following slide-bar with reducer output shaft, one is enclosed within the pulley that can freely rotate on this, identical and the same with this pulley its axial location of diameter of the pulley that diameter is bigger in its diameter and the downslide wheels remains in the median plane of pylon substantially, another is enclosed within on this pulley spindle with the pulley that the less pulley of the diameter in the downslide wheels equates free to rotately, its axial location is amesiality, a directive wheel free to rotate is installed on this pulley spindle, and its position is in the outside of truckle;
The movable pulley combination that can move up and down in pylon is positioned at, between the following fixed block group, comprise a framework, two be installed on this framework the while parallel to each other also with reducer output shaft and last, the pulley spindle of the parallel and coplane of following fixed block axle, overlapping two pulleys free to rotate on the every axle respectively, their diameter equals, truckle diameter in the following fixed block group, wherein the position higher the axle on two pulleys aims at two pulleys in the last fixed block group respectively, the position lower spool on two pulleys aim at two pulleys in the following fixed block group respectively;
Steel cable is not wrapped on each pulley as follows across: an end is fixed on the base by euphroe, the other end from after onwards walk around pulley spindle upper deflecting lower the movable pulley combination pulley walk around another pulley of upwards walking around behind the pulley that aligns with this pulley on the downslide wheel shaft on the pulley spindle lower in the movable pulley combination then downwards, and then walk around large pulley in the downslide wheels downwards, after this steel wire rope head is upwards guided to the last fixed block group that is positioned at the top always, walk around the large pulley that is positioned at axle central authorities in this assembly pulley, walk around the pulley of aiming at this large pulley on the higher pulley spindle in position in the movable pulley combination then downwards, and then upwards walk around on the fixed block axle and turn to down behind another pulley, walk around another pulley on the higher pulley spindle in position in the movable pulley combination again, be fixed on the pylon through another euphroe after then fag end upwards being walked around directive wheel on the fixed block axle.
4, long stroke pumping unit as claimed in claim 2 is characterized in that, stroke enlarger wherein comprises:
Be fixed on the following fixed block group of reducer top in the pylon, it comprises one in order to the downslide wheels are fixed on the bearing on the pylon, be fixedly mounted on this bearing and downslide wheel shaft parallel with reducer and in same vertical guide, one is enclosed within large pulley free to rotate on this pulley spindle, its axial location is basically in the tower center face, another is enclosed within the less pulley of diameter free to rotate on this pulley spindle, and its axial location is amesiality slightly;
Be installed in the last fixed block group on top in the pylon, comprise one in order to fixed block group on this is fixed to the bearing on the pylon, be fixedly mounted on this bearing and the top sheave axle of and coplane parallel with the downslide wheel shaft with reducer output shaft, one is enclosed within this and goes up pulley free to rotate, identical and the same with this pulley its axial location of diameter of the pulley that diameter is bigger in its diameter and the downslide wheels remains in the median plane of pylon substantially, another is enclosed within on this pulley spindle with the pulley that the less diameter of pulley of diameter in the downslide wheels equates free to rotately, its axial location is partial to the opposite side of a side of being partial to the medium and small pulley of downslide wheels, a directive wheel free to rotate is installed on this pulley spindle, and its position is in the outside of truckle;
The movable pulley combination that can move up and down in pylon is positioned at, between the following fixed block group, comprise a framework, one and reducer output shaft and last are arranged on this framework, the pulley spindle of the parallel and coplane of following fixed block axle, four diameters and last have been installed on this axle side by side, the identical pulley of the medium and small diameter of pulley of following fixed block group, but these four pulleys all independence and freedom rotate, the pulley that is positioned at two outsides is respectively with last, the truckle of following fixed block axle upper offset is aimed at, and two middle pulleys lay respectively at, the both sides of the vertical plane at two large pulley places and as far as possible close this plane in the following fixed block group;
Steel cable is not wrapped on each pulley as follows across: an end is fixed on the base by polished rod eye, the other end from after walk around the movable pulley combination pulley that the truckle with F fixed block axle upper offset aligns forward, walk around down fixed block axle pulley up and down then downwards, upwards walk around again in the movable pulley combination and the immediate pulley of pulley of just having walked around wire rope, walk around down the large pulley on the fixed block axle then downwards, after this, the last fixed block group that steel wire rope head directly upwards outreaches, from after walk around forward and get back to running block behind the large pulley on the fixed block axle and walk around the 3rd pulley on this pulley spindle, through upwards walking around the truckle on the fixed block axle behind this pulley, walk around last pulley in the running block then downwards, steel wire rope head is upwards drawn, after walking around the directive wheel on the fixed block axle, steel wire rope head is fixed on the pylon through another euphroe.
As claim 3 or 4 described long stroke pumping units, it is characterized in that 5, the elasticity antifriction material that embeds in the pulley groove in this stroke enlarger is an oil resistant rubber.
As claim 3 or 4 described long stroke pumping units, it is characterized in that 6, being equipped with on the movable pulley combination framework in the stroke enlarger wherein can be along the roller of fromer rail rolling on the pylon.
7, long stroke pumping unit as claimed in claim 1 is characterized in that, wherein said euphroe comprises: cannulated sleeve, truckle, hollow draw-bar, end face bearing, compression spring, locking nut, adjusting screw(rod), bearing and hollow sleeve cover; Cannulated sleeve is a band bore hole and cylindrical sleeve end sealing, have on its blind end along the outwardly directed ear seat of sleeve axis direction, openend has internal thread, hollow draw-bar is the elongate rod of a hollow, the one end has the disc flange, the other end has internal thread, and flange can slide in the bore hole of sleeve; Truckle is hinged on the ear seat of cannulated sleeve, the flanged (FLGD) end of hollow draw-bar is put in the sleeve, the other end of bar stretches out and is connected and the nut check that is locked with adjusting screw(rod) on being hinged on drag link bearing by screw thread from the circular hole on the socket cover, end face bearing and compression spring are placed in the cannulated sleeve and are enclosed within on the hollow draw-bar, an end face of bearing leans against on the flange, another side contacts with the compression spring, and the other end of this compression spring withstands on the socket cover.
8, long stroke pumping unit as claimed in claim 1, it is characterized in that, wherein the rope locking machine that stroke enlarger and balance weight dolly are linked together comprises: the rope locking machine mount pad, two clamping plate, one of them and this mount pad are fixed into one, another clamping plate removably are connected with strap with bolt, be clipped between two clamping plate and embed key in the translot on the clamping plate, with the fixture block that is embedded on the clamping plate clamping area, have on these fixture blocks with wire rope and turn round around the consistent tooth line of direction, clamping the stroke enlarger in couples from both sides is positioned at, that section wire rope between the following fixed block group, and tighten with bolt, the rope locking machine mount pad is connected and fixed through bolt and balance weight dolly.
9, long stroke pumping unit as claimed in claim 1, it is characterized in that, first erecting device that wherein is used for balance weight one polished rod system comprises: be inserted in the crossbeam between the two column top slots on the balance weight dolly, there is a through hole perpendicular to top plan at this crossbeam middle part, and insert respectively in the slot of the little stay of balance weight at these beam two ends; Between the top of the slot at crossbeam two ends end face and column top two block rubbers that thickness is suitable are arranged, its top and bottom contact with the upper surface of the upper surface in rectangular formula hole and crossbeam respectively and make the end face of slot on crossbeam two ends end face and the column keep certain interval; The safety pin ejecting mechanism comprises safety pin that is configured in its crossbeam both sides cinclides and the mechanism that controls safety pin, this controlling organization comprises that an end has the push rod of diameter greater than the flange of crossbeam middle part through hole, on this flange outer face the projection parallel with axis arranged, push rod passes the hole at crossbeam middle part, its flange is against on the crossbeam soffit, the upper end from covering of crossbeam mider hole pass be enclosed within steel wire end noose truckle connect; Be enclosed within compression spring on the push rod above withstand on cover, below withstand on and make the keep down trend of motion of push rod on the push rod flange; The lever middle part is hinged on the crossbeam, and front end has a claw that protrudes; Another compression spring action stretches in the translot on the safety pin front end claw of lever at the lever first half, and the projection on lever rear end and the push rod is kept in touch, and the elastic force of this compression spring is compressed the elastic force of spring on the push rod; The first half diameter of safety pin is bigger, this a part of rear portion has a translot that the claw of lever is entered, its front end is placed in the hole of crossbeam side arm slidably, the vertical and intersectant centerline of slotted hole on its axial line and the rear rail, and the safety pin point diameter is less than the width of slotted hole on the rear rail; The compression spring housing is on thinner latter half of of the diameter of safety pin, front end withstands on the safety pin circular bead surface, the rear end withstands on the surface of a part of stretching out from the crossbeam, make safety pin remain the trend of outside ejection, safety pin one end passes this bossing and the hole from crossbeam, and the other end has the control safety pin to eject nut apart from usefulness.
10, long stroke pumping unit as claimed in claim 9, it is characterized in that, also comprise a wire on the rear rail that is installed in pylon in described first safety device, the upper end of this wire is fixed, the lower end directly or indirectly connects by the gauge tap in the electromotor control circuit of certain mode and oil pumper, the position of this wire the rear rail inboard just in time with rear rail on the central lines of slotted hole, also have the V-shaped groove of vertical direction on the end face of this safety pin, the bottom of groove is just aimed at wire, thereby can cut off the power supply of this wire cut-out oil pumper when this safety pin At time of eject.
11, long stroke pumping unit as claimed in claim 1, it is characterized in that, second safety device wherein is installed in the stroke enlarger, it comprises collision block one switching system, wherein a part is fixed on the cannulated sleeve of euphroe and can moves with cover, and another part is installed in and maintains static on the appropriate location of oil pumper and be connected with the motor of oil extractor control circuit.
12, long stroke pumping unit as claimed in claim 1 is characterized in that, when polished rod is positioned at midstroke, the peak of wire rope with at this moment big head sheave excircle is connected with pressing plate with bolt, they is not had in motion process relatively slide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85103185.4A CN1004294B (en) | 1985-04-26 | 1985-04-26 | Long stroke pumping unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85103185.4A CN1004294B (en) | 1985-04-26 | 1985-04-26 | Long stroke pumping unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85103185A CN85103185A (en) | 1986-10-22 |
| CN1004294B true CN1004294B (en) | 1989-05-24 |
Family
ID=4793020
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN85103185.4A Expired CN1004294B (en) | 1985-04-26 | 1985-04-26 | Long stroke pumping unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1004294B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1083942C (en) * | 1999-12-10 | 2002-05-01 | 华北石油管理局第一机械厂 | Curved beam pumping unit |
| CN1312379C (en) * | 2003-12-02 | 2007-04-25 | 哈尔滨工业大学 | Drive rope rupture protector for oil pumping machine |
| CN101187303B (en) * | 2007-08-04 | 2012-12-26 | 胜利油田森诺胜利工程有限公司 | Novel pumping machine |
| CN102191929B (en) * | 2008-06-19 | 2014-01-08 | 黑龙江省万意达石油工程有限公司 | Vertical energy-saving pumping unit |
| CN102536170A (en) * | 2012-02-01 | 2012-07-04 | 山东理工大学 | Pulley type oil pumping machine |
| CN103867164B (en) * | 2012-12-11 | 2016-10-05 | 李江保 | A kind of long stroke pumping unit |
| CN105465304B (en) * | 2015-12-30 | 2018-06-26 | 中国矿业大学 | The mechanism and method of a kind of reciprocating running speed and displacement equations |
| CN108979596B (en) * | 2018-09-14 | 2024-04-05 | 贵州航天林泉电机有限公司苏州分公司 | Vertical pumping unit with belt fracture protection function |
-
1985
- 1985-04-26 CN CN85103185.4A patent/CN1004294B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN85103185A (en) | 1986-10-22 |
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