WO2008071089A1 - Traction drive double-oilwell pumping unit - Google Patents

Abstract

A traction drive double-oilwell pumping unit comprises a frame (16) and transmission mechanisms mounted on the frame. The transmission mechanisms comprise a smaller traction driving wheel (11), a wire line (12) winded on the smaller traction driving wheel, a V directive wheel (305) , a VI directive wheel (306), a III directive wheel(303) and a IV directive wheel (304). Wherein the V directive wheel (305) and the VI directive wheel (306) are located at each side of the smaller traction driving wheel (11) respectively and transmit the wire line at both sides of the smaller traction driving wheel. The III directive wheel (303) transmits the wire line between the V directive wheel (305) and a I mule-head hanger (901). The IV directive wheel (304) transmits the wire line between the VI directive wheel (306) and a II mule-head hanger (902). A bigger traction driving wheel (7) being coaxial with the smaller traction driving wheel (11) is connected to a traction wheel (801) of a tractor (8) through a flexible line belt (14). The device has many advantages, such as lower manufacturing cost, energy saving, longer stroke and so on.

Description

 Traction double well pumping unit

 Field

 The invention relates to a double fine oil machine, in particular to a traction double oil machine.

technical background

 At present, the total strength of the Guoqi pumping unit is: super large load, long stroke, low stroke; precise balance; automation, intelligent; energy saving, high adaptability; no long beam stroke; large size.

 1) Energy conservation has become a basic requirement for pumping units.

 At present, most of the onshore oil fields have entered the mid-to-late development stage. As the water content of crude oil continues to rise, the pressure of the reservoir and the dynamic surface of the oil well decrease. In order to maintain stable production of crude oil, crude oil production does not decrease with the decrease of water content. The amount of liquid collected must be increased, so that the cost of oil production must increase. Among the oil production costs, the pumping and electromechanical costs have accounted for about 30%. Therefore, it is required that the pumping unit not only meets the process requirements for deep pumping and large displacement, but also has the characteristics of low energy consumption. Belt-type pumping units, double-head pumping units, pendulum-type pumping units, and grinding wheel pumping units that are actually put into use have significant energy-saving effects in addition to their different characteristics. In oilfield mechanical oil recovery, pumping unit wells account for 82.1% of the total number of wells. Due to the low system efficiency of pumping unit wells, a large number, or even more than 70%, of energy is lost during the transfer process. Therefore, at home and abroad. All are committed to the development of energy-saving pumping units.

 Low-profile pumping unit, front-mounted pumping unit, front-mounted gas-balanced pumping unit, long-stroke pumping without beam, wheeled pumping unit and out-of-phase pumping unit. China National Petroleum Corporation averages about 20-30% of the electricity cost per ton of oil cost, and the electricity cost of local oilfield production costs is larger. The electricity consumption of pumping units accounts for a considerable proportion of electricity expenditure. All of them are developing low-cost, high-efficiency, maximizing the potential for saving electricity, saving energy from the mechanical system and electrical control system of the pumping unit, which can bring considerable economic benefits and improve the green GDP index. .

 The crank balance beam pumping unit is an old product that has been consistently produced for decades. It is the standard design of the American Petroleum Institute. The biggest advantages of this machine are:) Simple structure and convenient installation; (ϋ) Beam-type polished rod shifting movement The speed curve is in accordance with the liquid twitch theory. The biggest disadvantages of this machine are:) Low efficiency and large reactive loss; (ϋ) High failure rate and large downtime loss; (iii) Stroke balance must be coordinated by the crane to make the female high. In China's industry, almost no update has been made from theory to practice, all of which are crank-balanced beam pumping units.

 2) Long stroke, low stroke.

In the case of a certain pumping capacity of the pumping unit, the long stroke and low stroke pumping method has many significant advantages, such as improving pump efficiency and extending the life of the rod string. With the development of electric drag technology, the method of switching reluctance motor and linear motor uses the method of reversing the pumping unit. This inevitably promotes the pumping unit to long strokes Direction development. Friction wheel pumping units, linear motor pumping units and electric drum pumping units have emerged in recent years. After 4 years, Dagang Drilling and Drilling Institute developed a linear motor-driven pumping unit, but the ait ship is high, and the price of a u^ stroke pumping unit is about one million. The world's highest-stroke American 30-meter stroke pumping unit is more expensive.

 Oilfield non-self-injection wells use pumping units to raise the pump's up and down reciprocating motion for pumping, according to international standards.

GB11649-49 stipulates that the current structural forms of pumping units mainly include: conventional type beam type, gas balance beam type, front type beam type and special type beam type. The main disadvantages are: heavy weight, low efficiency, and transmission efficiency of only 0. 125- 0. 54.

 Chinese patent CN1375618A discloses a "rope double-well interactive self-balancing pumping unit", which uses a steering motor to drive the reel with a rope and a guide wheel to separate the front and rear balance weights of the front beams of the two well beams. Connected to realize the reciprocating motion of the two oil thin oil rods up and down. The main disadvantages are: two oil wells still need two sets of hoes, beams, balance weights, etc. The added connectors, overload protection devices, commutators, limiters and other mechanisms make the equipment costly, and the gears of the reducer are meshed. Xiao staff is expensive! Low mechanical efficiency and frequent maintenance.

 Chinese patent CN2356162Y discloses an "ultra-low-cost double-well pumping unit", which uses a hydraulic pump, a hydraulic cylinder, a fuel tank, a commutator, and is connected to a sucker rod through a top fan-shaped body. The hydraulic cylinder piston rod is composed of a hydraulic pump and a motor. Power is provided, and the reversing valve controls the hydraulic cylinder to move to the new position. The following deficiencies exist:

 1. The hydraulic cylinder piston rod and commutator need to be replaced frequently under continuous working.

 2. Fuel tank, hydraulic pump, hydraulic cylinder piston rod rubber seals are prone to aging and oil leakage under open air operation, so that? ? The pressure is unstable.

 3. When one of the wells is overhauled, the other well needs to be shut down.

 4. The top segment is composed of four large-sized, concentrically fixed, equal-phase arc segments, which are time-consuming and labor-intensive to process and install.

 Compared with the traditional gear reduction technology, the rare earth permanent magnet synchronous gearless traction machine has high efficiency, simple structure, small volume and no pollution. It is suitable for low-speed and large-torque transmission. It is a modern mechanical equipment. The main development direction of the special system. In 1996, Finnish KONE took the lead in applying rare earth permanent magnet synchronous gearless traction machines to elevators, which is still the leading technology in the elevator industry.

 Chinese patent 200510046026. 0, CN1664305A discloses an "electronic-electrical-mechanical integrated traction pumping unit", which eliminates the reducer, the efficiency can reach more than 90%, and the stroke and stroke are steplessly adjustable.

Synchronous gearless traction machine, precise and stable operation, direct drag, low speed and large torque, the same volumetric efficiency, and other unique features, such as power-free parking autism and other unique features, the risk is continuous working all-weather open-air operation, from North to South climate change ambient temperature The moisture dew point on the ocean has no effect on the functional stability and longevity of the electronic components of the control system. However, the shortcomings are: Can not be used for double well pumping. A counterweight that matches one end of the sucker rod is required, that is, when the weight of the pumping unit is 18 tons, the other end also requires a balance weight of about 18 tons. Only one end works, and the other end loses power. The telescopic mechanism of the head consists of the guide rail, handle and screw on the upper part of the rack. The end of the load carrying body is the cantilever end. The machining precision is high. The guide screw needs to be lubricated and lubricated, and the manufacturing and safety are high.

Summary of the invention

 It is an object of the present invention to provide a traction double well pumping unit that solves the technical problems of high manufacturing cost, high energy consumption, and high energy consumption in the technical background.

 The technical solution of the present invention is as follows:

 A traction double oil machine comprising a bracket 16 and a transmission mechanism disposed on the bracket 16, wherein the transmission mechanism comprises: a traction drive small wheel 11 wound around the traction drive small wheel 11 The transmission wire rope 12, the V drive guide wheel 305 and the VI drive guide wheel 306 of the transmission wire rope 12 at both ends of the traction drive pin 11 and the transmission traction drive wheel 11; the transmission V drive guide wheel 305 and the I pulley suspension The III drive guide wheel 303 of the drive wire rope 12 between the ropes 901 transmits the IV drive guide wheel 304 of the drive wire rope 12 between the VI drive guide wheel 306 and the II pulley suspension 902; the traction drive wheel 11 passes The coaxially disposed tracing I transmission large wheel 7 is coupled to the towline I wheel 801 of the dragline machine 8 via a flexible conveyor belt 14.

 The above-mentioned bracket 16 may be provided with a weight guiding wheel 4, and the weight guiding wheel 4 includes a weight guiding wheel 403 disposed on the bracket 16, and a weight-receiving wheel 403 is wound around the weight-receiving wheel 403. One end of the household weight wire rope 13 is connected to the weight 10, and the other end of the weight wire rope 13 is connected to the I pulley suspension 901 via the I weight guide wheel 401 or to the II through the II weight guide wheel 402. Pulley suspension 902.

 The bracket 16 described above may be provided with a weight guiding wheel 4, and the weight guiding wheel 4 includes an Ilffi heavy guiding wheel 403 and an IV weight guiding wheel 404 which are disposed at two ends of the bracket 16; The I-weight wire rope 1301 is wound around the guide wheel 403. One end of the I-weight wire rope 1301 is connected to the I-weight 1001, and the other end of the I-weight wire rope 1301 is connected to the I pulley hanging rope via the I-weight guide wheel 401. The IV weighting guide wheel 404 is wound around the II weight wire rope 1302. One end of the II weight wire rope 1302 is connected with the II weight 1002, and the other end of the II weight wire rope 1302 is II weighted. Guide wheel 402 is coupled to II pulley suspension 902.

The above-mentioned I pulley suspension 901 is connected to the I sucker rod 1501, and the I pulley suspension 901 is wound with a transmission wire rope 12; the transmission wire rope wound around the I pulley suspension 901 One end of the driving wire 12 is fixed on the bracket 16, and the other end of the driving wire rope 12 drives the guiding wheel 303 and the V driving guiding wheel 305. After bypassing the drag I drive small wheel 11, and then driving the guide wheel 304 through the VI drive guide wheel 306 and IV, and then bypassing the II pulley suspension 902 connected to the II sucker rod 1502, the bracket 16 is fixed to the bracket 16 on.

 One end of the transmission wire rope 12 wound around the I pulley suspension 901 is fixed to the bracket 16 by the I rope tightener 101, and the other end of the transmission wire rope 12 is fixed to the bracket 16 .

 The above-mentioned I pulley suspension 901 is connected to the I sucker rod 1501, and the I pulley suspension 901 is wound around the transmission wire rope 12; 1 One end of the transmission wire rope 12 on the pulley suspension 901 is fixed On the bracket 16, the other end of the transmission wire 12 first passes around the III drive guide wheel 303 and the V drive guide wheel 305, then bypasses the traction drive wheel 11 and then passes through the VI drive guide wheel 306, and then ^! The VI weight guide wheel 406 fixed to the II weight 1002 is fixed to the bracket 16.

 One end of the transmission wire 12 wound on the I pulley suspension 901 is fixed to the bracket 16 by the I weight tightening rope 103, and the other end of the transmission wire 12 is fixed by the II weight tightener 104. On the bracket 16.

 The I pulley suspension 901 and the II pulley suspension 902 described above are pulley suspensions composed of a single pulley or a pulley block; the pulley suspension consisting of the pulley block is 4: 1 or 6: 1 or 8: 1 pulley block consisting of a pulley suspension.

 The diameter ratio of the traction sheave 801 of the hoisting machine 8 to the traction drive wheel 7 is 1: 2 to 4.

 The I rope tightener 101 described above is fixed to the bracket 16 by the I suspension bracket 601, which is perpendicular to the I sucker rod 1501; the II rope tightener 102 passes the II suspension bracket 602. Fixed to the bracket 16, the II suspension bracket 602 is perpendicular to the II sucker rod 1502.

 The portion of the bracket 16 above the well, the I suspension bracket 601 and the II suspension bracket 602 constitute a rotary head 2, and the rotary head 2 is coupled to the other portions of the bracket 16 by at least two axle pins 5. Fixed, the at least two pins 5 are disposed on two sides of the rotating machine head 2.

 The invention has the following advantages:

 1. A permanent magnet synchronous motor directly drives the double #3⁄4 oil. Structure optimization, safety and convenience. The equipment has high reliability, long trouble-free operation time and low maintenance cost. It has a well-repairing function in addition to the pumping function.

 2. Long stroke, low stroke, stroke can be adjusted freely. The long stroke makes the pump full of high coefficient and the hydraulic impact is small; the low stroke makes the downhole equipment wear less and the operation cost is low. Extra long stroke, according to the actual application stroke can be much larger than 30 meters, in addition to the pumping function, it also has a workover function.

3. The design has a weight compensation device. When a well needs to be repaired, the rotating machine head can deviate from the upper part of the well to give up the maintenance space; while the other oil well and the weight compensation are balanced and can work normally. 4. Wire rope drive. The long-life heavy load and the wire rope transmit power, and the elastic buffering action can reduce the commutation shock and make the sucker rod column run smoothly.

 5. Permanent magnet synchronous motor is directly driven. Due to the direct drive of the permanent magnet synchronous motor and the weight balance of the two wells, the low power motor can be selected without the reducer, the energy saving is 40-60%, the weight of the equipment is reduced by 1/3, the daily maintenance cost is reduced by about 1/2, and the capital cost is reduced. 1/2.

 6. Optimize the structural design, safe and convenient. The whole mi-closed design, the rotating head rotates through the workover, and the assembly is folded and transported. The shed is safe and convenient.

 7. High reliability, no need for frequent maintenance. The design of the whole machine is evenly applied and the rigidity is good. Wear-resistant bearings, long-life wire ropes, heavy-duty guide wheels ensure high reliability of the machine; mechanical balance, automatic protection and control system, so that the machine does not need frequent maintenance.

 8. It is equivalent to the motor power of the pumping unit of the prior art, but it can directly drag two oil wells of the same well depth. Extra long strokes and energy saving make it universal for land and sea.

DRAWINGS

 Fig. 1 is a schematic view showing the structure of a first embodiment of the present invention.

 Fig. 2 is a schematic view showing the structure of a second embodiment of the present invention.

 Description of the drawings: 1_suspension rope tightener; 10 I I tight rope, 102- II tight rope, 103-I weight tight rope, 104-Π weight tight rope; 2-rotary machine Head; 3-drive guide wheel; 30-I drive guide wheel, 302-Π drive guide wheel, 303-III drive guide wheel, 304-IV drive guide wheel, 305-V drive guide wheel, 306-VI drive guide wheel; 4-weight guide wheel; 401-I counterweight guide wheel, 402-11 counterweight guide wheel, 403-11 top heavy guide wheel, 404-IV counterweight guide wheel; 405-V counterweight guide wheel, 406- VI counterweight guide wheel; 5-axis pin; 6-suspension bracket; 601-I suspension bracket, 602-II suspension bracket; 7 - traction drive large wheel; 8- traction machine; 80 pulley traction wheel 9-pulley suspension rope; 90-I pulley suspension, 902-II pulley suspension; 10-weight; 100-I weight, 1002-II weight; 1 traction drive wheel; - Transmission wire rope; 13 - Counterweight wire rope; 130 I weight wire rope, 1302-II weight wire rope; 14-flexible belt; 15 - sucker rod; 150 Bu I sucker rod, 1502-11 sucker rod; support.

Specific form

The pulley suspension device 9 of the present invention includes an I pulley suspension 901 and an II pulley suspension 902, which may be a pulley suspension constructed of a pulley set of 4:1 or 6:1 or 8:1. 1 is a schematic structural view of an embodiment of the present invention with a transmission ratio of 12:1. The I drive guide wheel 301 is a drive guide wheel of the pulley block of the I pulley suspension 901, and the II drive guide wheel 302 is a II pulley suspension. The guide pulley of the pulley block of 902. The I pulley suspension 901 is connected to the I sucker rod 1501 of the one side well, and the transmission rope 12 is wound around the I pulley suspension 901. One end of the drive wire 12 on the I pulley suspension 901 is fixed to the bracket 16, and is generally fixed to the I tight rope on the bracket 16. The I tight-rope vessel is specifically fixed on the I suspension bracket 601, and the I suspension bracket 601 is fixedly coupled to the bracket 16. The present invention is applicable to both the vertical well and the inclined well when the I suspension bracket 601 is perpendicular to the I sucker rod 1501. When the I sucker rod 1501 is located in a vertical well perpendicular to the horizontal plane, the I suspension bracket 601 is parallel to the horizontal plane. The suspension rope tightener 1 of the present invention includes an I tight rope cutter 101, an II tight rope cutter 102, a I weight tight rope cutter 103, a II weight tight rope cutter 104, and the like. The suspension bracket 6 includes an I suspension bracket 601 and an II suspension bracket 602 and the like. The sucker rod 15 includes an I sucker rod 1501, a II sucker rod 1502, and the like. The I pulley suspension 901 is coupled to the I sucker rod 1501. One end of the drive wire 12 wound around the I pulley suspension 901 is fixed to the bracket 16, and the other end is wound around the III drive guide wheel 303 and the V drive guide wheel 305, then the traction drive wheel 11 is bypassed, and then wound around The VI-driven guide wheels 306 and IV drive the guide wheels 304, and then bypass the II pulley suspension 902 connected to the other side well II sucker rod 1502, and then fixed to the bracket 16. Typically, it is attached to the II tightener 102 on the bracket 16. Similarly, the II suspension bracket 602 of the fixed II tightener 102 is perpendicular to the II sucker rod 1502.

 The traction sheave of the traction machine 8 The 801 conveyor belt 14 is connected to the traction drive large wheel 7, and the traction drive small wheel 11 and the traction drive large wheel 7 are arranged coaxially. The flexible conveyor belt 14 may specifically be a steel cord, a V-belt or a flat belt. The traction machine 8—3⁄4 uses a permanent magnet synchronous traction machine. The diameter ratio of the traction sheave 801 of the hoisting machine 8 to the traction drive wheel 7 is generally 1: 2 to 4. The diameter of the traction sheave 801 of the hoisting machine 8 is similar to the diameter of the traction drive small wheel 11 and the drive guide wheel 3.

 When the two oil wells of the present invention work, the lifting gravity is equal, that is, when the load gravity of the two oil wells is in an equilibrium state, the weight 10 is not required to be compensated. When the lifted gravity of the two wells is not equal, the counterweight 10 can be placed on the side of the gravity to compensate, so that the dynamic load of the oil wells of the two wells is balanced by gravity.

 The bracket 16 is provided with a counterweight guide wheel 4, and the counterweight guide wheel 4 includes 11 top weight guide wheels 403 and IV weight guide wheels 404 which are disposed at two ends of the bracket 16. The IISS weight guide wheel 403 is wound with an I weight wire rope 1301. One end of the I weight wire rope 1301 is connected to the I weight 1001; the other end of the I weight wire rope 1301 is connected to the I pulley suspension 901 via the I weight guide wheel 401. The IV weight guide wheel 404 is wound with a second weight wire rope 1302. II One end of the weight wire rope 1302 is connected to the II weight 1002, and the other end of the II weight wire rope 1302 is connected to the II pulley suspension 902 via the II weight guide wheel 402.

2 is a schematic view showing the structure of an embodiment of the present invention with a gear ratio of 6:1. The I pulley suspension 901 and the II pulley suspension 902 are pulley suspensions composed of a single pulley. The suspension ratio of a single pulley suspension is 2 _: 1. The I pulley suspension 901 is coupled to the I sucker rod 1501. One end of the drive wire 12 wound around the I pulley suspension 901 is fixed to the bracket 16, and the other end of the winding II drives the guide wheel 303 and the V drive guide wheel 305, and then bypasses the traction drive wheel 11, and then rewinds After the VI drives the guide wheel 306, it is fixed to the bracket 16 by bypassing the VI weight guide wheel 406 fixed to the II weight 1002. One end of the drive wire 12 wound around the I pulley suspension 901 is fixed to the bracket 16 by the I weight tightener 103, and the other end is fixed to the bracket 16 by the II weight tightener 104.

 The portion of the bracket 16 above the well, the I suspension bracket 601 and the II suspension bracket 602 constitute a rotating head 2, and the rotating head 2 ® 1 at least two pins 5 are fixed to the other portions of the bracket 16, at least two axle pins 5 is set on the two sides of the rotating machine head 2.

 When one side of the well is not working, the other side of the well can work normally alone. For example, when the A well needs to be repaired, the I pulley suspension 901 is removed, the transmission wire 12 of the I clamp 101 is removed, and the I sucker 1501 and the I pulley suspension 901 are disconnected, and the I weight wire rope 1301 One end of the connection to the I pulley suspension 901 is disconnected. One end of the transmission wire rope 12 is fixed to the II suspension rope bracket 602 through the II clamp 102; the other end of the transmission wire rope 12 3⁄4M I weight tight rope cutter 103 is directly fixed to the I suspension support 601, and passes through IV in the middle. The drive guide wheel 304, the VI drive guide wheel 306, the traction drive small wheel 11, and the V drive guide wheel 305 are connected to the I counterweight 1001. The weight of the I counterweight 1001 should be equal to the working load of the well B. Remove the axle pin 5 on one side of the fixed rotary head 2 on the upper part of the A well, and rotate the rotary head 2 to the upper part of the A well with the other side axle pin 5 as the pivot, so that there is no suspension in the vertical upper space of the A well. Object, to facilitate the maintenance of the A well. At this time, the B well can still work normally. After the A well is overhauled, it can be re-homed to restore the normal operation of the double well.

 The I counterweight 1001 and the II counterweight 1002 on both sides of the present invention can be adjusted according to the working load of the two wells, and the driving torque of the traction machine 8 should be balanced. The invention is applicable to two straight wells, one inclined well, two inclined wells, and one well to repair another well, the single well boot work, the double well work at the same time, and the double well work load are not equal.

Claims

Claim  A traction double oil machine comprising a bracket (16) and a transmission mechanism disposed on the bracket (16), wherein the transmission mechanism of the household unit comprises: a traction drive small wheel (11), winding The drive wire rope (12) on the traction drive small wheel (11), the V drive guide wheel of the drive wire rope (12) at both ends of the traction drive small wheel (11) and the two ends of the traction drive small wheel (11) (305) and VI drive guide wheel (306); transmission V drive guide wheel (305) A drive guide wire (303) for driving the wire rope (12) between the I pulley and the suspension rope (901), and a transmission wire rope between the VI drive guide wheel (306) and the II pulley suspension (902) ( 12) IV drive guide wheel (304); said traction drive small wheel (11) is connected to the traction machine (8) via a flexible conveyor belt (14) via a coaxially disposed traction drive wheel (7) Traction wheel (801).  The traction double well pumping unit according to claim 1, wherein the bracket (16) is provided with a weight guiding wheel (4), and the weight guiding wheel (4) comprises An Ilffi heavy guide wheel (403) disposed on the bracket (16), the weight guiding wire (403) is wound with a weight wire rope (13), and one end of the weight wire rope (13) is opposite to the weight (10) Connecting, the other end of the weight wire rope (13) is connected to the I pulley suspension (901) via the I weight guide wheel (401) or to the II pulley suspension cable via the II weight guide wheel (402) ( 902).  3. The traction double bell oil machine according to claim 1, wherein the bracket (16) is provided with a weight guiding wheel (4), and the weight guiding wheel (4) comprises a HISS weight guiding wheel (403) and an IV weight guiding wheel (404) at both ends of the bracket (16); the insing heavy guiding wheel (403) is wound with an I weight wire rope (1301), the I weight wire rope One end of (1301) is connected to the I weight (1001), and the other end of the I weight wire rope (1301) is connected to the I pulley suspension (901) via the I weight guide wheel (401); The counterweight guide wheel (404) is wound with a II weight wire rope (1302), one end of which is connected to the II weight (1002), and the other end of the II weight wire rope (1302) is The II counterweight guide wheel (402) is coupled to the II pulley suspension (902).  The traction double well pumping unit according to claim 1, wherein the I pulley suspension rope (901) is connected to an I sucker rod (1501), and the I pulley suspension rope a transmission wire rope (12) is wound around the device (901); one end of the transmission wire rope (12) wound around the I pulley suspension cable (901) is fixed to the bracket (16), and the transmission wire rope (12) The other end of the winding II drives the guide wheel (303) and the V drive guide wheel (305), and then bypasses the traction drive small wheel (11), and then drives the guide wheel (306) and the IV drive guide wheel (304). Then, after bypassing the II pulley suspension (902) connected to the II sucker rod (1502), it is fixed to the bracket (16). 5. A towline I double oil machine according to claim 4, wherein one end of the drive wire rope (12) wound around the I pulley suspension (901) is passed through an I rope tightener (101) Fixed to the bracket (16), The other end of the drive wire (12) is secured to the bracket (16) by a II tensioner (102).  The traction double well pumping unit according to claim 1, wherein the I pulley suspension device (901) is connected to an I sucker rod (1501), and the I pulley suspension rope a transmission wire rope (12) is wound around the device (901); one end of the transmission wire rope (12) wound around the I pulley suspension cable (901) is fixed to the bracket (16), and the transmission wire rope (12) The other end is wound around the III drive guide wheel (303) and the V drive guide wheel (305), bypasses the traction drive wheel (11), and then passes through the VI drive guide wheel (306), and then is fixed around The VI weight guide wheel (406) on the II weight (1002) is fixed to the bracket (16).  7. A traction double oil machine according to claim 6, wherein said one end of said transmission wire rope (12) wound around the I pulley suspension (901) is passed through an I weight tightening rope (103) Fixed to the bracket (16), the other end of the transmission wire (12) 3⁄41 is fixed to the bracket (16) by the II weight tightening device (104).  The traction double well pumping unit according to any one of claims 1 to 7, wherein the I pulley suspension rope (901) and the II pulley suspension rope (902) are single pulleys A pulley suspension device composed of a pulley block; the pulley suspension device composed of the pulley block is a pulley suspension device composed of a pulley set of 4:1 or 6:1 or 8:1.  9. The sling double oil machine according to claim 7, wherein the ratio of the diameter of the traction sheave (801) of the leg traction machine (8) to the traction drive wheel (7) is 1: 2~ 4.  10. The traction double oil machine according to claim 9, wherein the ship's I rope tightener (101) is fixed to the bracket (16) by an I suspension bracket (601), the I suspension bracket (601) perpendicular to the I sucker rod (1501); the II stringer (102) is fixed to the bracket (16) by a II suspension bracket (602), the II suspension bracket (602) and II The sucker rod (1502) is vertical.  The traction double oil machine according to claim 10, wherein the portion of the leg bracket (16) above the well, the I suspension bracket (601) and the II suspension bracket (602) constitute a rotating machine. The head (2), the rotating head (2) is fixed to the other part of the bracket (16) by at least two shaft pins (5), and the at least two shaft pins (5) are respectively arranged on the rotating head The two sides of (2).