CN202031549U - Pneumatic-balance hydraulic pumping unit for offshore platform - Google Patents

Pneumatic-balance hydraulic pumping unit for offshore platform Download PDF

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Publication number
CN202031549U
CN202031549U CN2011201089531U CN201120108953U CN202031549U CN 202031549 U CN202031549 U CN 202031549U CN 2011201089531 U CN2011201089531 U CN 2011201089531U CN 201120108953 U CN201120108953 U CN 201120108953U CN 202031549 U CN202031549 U CN 202031549U
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CN
China
Prior art keywords
oil
cylinder
hydraulic
accumulator
offshore platform
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Expired - Fee Related
Application number
CN2011201089531U
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Chinese (zh)
Inventor
綦耀光
徐敬
刘新福
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China University of Petroleum Beijing CUPB
China University of Petroleum UPC East China
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China University of Petroleum UPC East China
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Priority to CN2011201089531U priority Critical patent/CN202031549U/en
Application granted granted Critical
Publication of CN202031549U publication Critical patent/CN202031549U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model relates to a pneumatic-balance hydraulic pumping unit for an offshore platform, which comprises a polished rod eye, a moving pulley, a flexible connecting mechanism, a fixed pulley, an energy storage device, a support, a composite stepped hydraulic cylinder and a hydraulic pump system. The hydraulic cylinder is mounted in an inner space of a truss frame, the lower end of a piston rod is connected with the moving pulley, and the energy storage device is mounted at the top of the support. The pumping unit is simple in structure, convenient in mounting, and more evident in energy saving effect as compared with the conventional energy-saving pumping unit, so that the shortage that the existing pumping unit cannot meet the requirements of offshore oil production due to large size, large occupied area and heavy total weight is overcome, and the novel oil production equipment is provided for later development of domestic offshore oilfields.

Description

Offshore platform gas balanced hydraulic oil extractor
Technical field
The utility model is a kind of novel gas balanced hydraulic oil extractor, is mainly used in oil field sucker rod pumping technical field, is specially adapted to the later development of offshore oilfield.
Background technology
Hydraulic pumping unit utilizes hydraulic transmission mode that the high speed rotary motion of motor is moved back and forth by the vertical line that hydraulic actuator (hydraulic cylinder or hydraulic motor) changes into oil pumper suspension point place, and drives downhole pump realization oil producing operation.Facts have proved, hydraulic pumping unit has the advantage of following several respects: hydraulic pumping unit has not only been broken beam pumping unit and has been converted electrical energy into and rotatablely move from the structural principle aspect, utilize mechanical method to rotatablely move again and change the way of straight reciprocating motion into, and transmission efficiency height, can realize stepless adjustment ground parameter, by the preferred adjustment of hydraulic system, its upper and lower stroke speed can separate regulation, has bigger superiority in the exploitation of viscous crude; Under certain oil pumper pumpage condition, hydraulic pumping unit can also alleviate the used load of sucker rod, has created condition for enlarging sucker rod pumping equipment in the scope of application aspect well depth and the output; Analyzing hydraulic pumping unit is very suitable from the mechanism aspect as the type of long stroke pumping unit, because the length of operational hydraulic cylinder as long as correspondingly extend, just can obtain quite long stroke, this moment, complexity, weight, the cost of oil pumper all increased seldom, its weight is the 10%-20% of quite similar beam pumping unit only, and can stepless easily adjustment stroke, strokes per minute, satisfy the oil production technology technical requirements for control automatically and created good condition.90% above time all was at the uniform velocity state in one-stroke, and inertial load is little, and exercise performance is good.The hydraulic pumping unit volume is little in addition, and quality is little, compact conformation, and floor space is little, can satisfy ocean and swampy area's Oilfield developing; Can realize totally-enclosed operation, be applicable to the deep-well or the ultradeep well oil and gas development in western desert area oil field; Hydraulic pressure standard component more in the hydraulic pumping unit constitutes, and can simplify designing and developing and manufacture process of complete equipment; Be easy to the enforcement of technology such as mechanical-electrical-hydraulic integration simultaneously, hydraulic pumping unit can be realized control and remote control automatically, and is easy to realize overload protection, is difficult for taking place equipment breakdown; After electromechanical integration was implemented, hydraulic pumping unit can be realized the automatic detection to oil well condition, running parameter is carried out self adaptation regulate, and had improved its adaptivity, and this is that other any oil pumpers are not available.
Find along with Oilfield developing by analyzing to the investigation of offshore oil production environment and to comprehensively relatively reaching of existing various oil pumpers, a large amount of heavy oil blocks will be exploited and employ, owing to will annotate steam exploitation, electric submersible pump can not satisfy the needs of oilfield exploitation, need the new oil production technology supporting technology of exploitation to satisfy the demand of oil well, and at present both at home and abroad existing various oil pumpers can not satisfy the requirement of using on the production platform at sea, must adopt effective measures to reduce complete machine height, complete machine quality and the floor space of oil pumper.And that hydraulic oil pumping unit has a volume is little, and therefore the advantage that floor space is little, stroke is long also becomes the research focus of novel oil production equipment.The hydraulic pumping unit of having designed at present has chain type long stroke hydraulic pumping unit, assembled hydraulic cylinder energy-conserving hydraulic pumping unit, with the variable frequency hydraulic closed type energy-saving oil pumper of accumulator balancing load, novel energy-conserving variable frequency closed type hydraulic pumping unit etc., but they are not because some shortcomings that self exist all are suitable for offshore oil production, for example, the chain type long stroke pumping unit has been realized the long stroke low jig frequency, but structure is complicated, because its balance mode is the ballast box balance, the complete machine quality is big in addition; Assembled hydraulic cylinder energy-conserving hydraulic pumping unit has obvious energy-saving effect, but analyzes from stressed angle, and piston rod is stressed asymmetric, has the problem of hydraulic cylinder and piston eccentric wear; Variable frequency hydraulic closed type energy-saving oil pumper with the accumulator balancing load adopts hydraulic counterweight, simple in structure, reduced installed power, operation safe, steady, in closed oil circuit, adopt bidirectional hydraulic lock also can make the start and stop of hydraulic pumping unit more steadily rapid, increase the stability and the safety of its work, but there is the well workover inconvenient problem of stepping down in this oil pumper; Novel energy-conserving variable frequency closed type hydraulic pumping unit is simple in structure, hydraulic cylinder travel is that half of stroke reduced the height of complete machine, adopt hydraulic counterweight, avoided the use counterweight block, alleviated complete machine weight, can satisfy the needs of offshore oil production, but piston rod is in tension state in upstroke, consider from the performance of material, when bearing the active force of equal size, the piston rod compression capability is stronger, and the offshore platform usefulness gas balanced hydraulic oil extractor hydraulic cylinder inverted design in the utility model, not only improved the sealing effectiveness of hydraulic cylinder greatly, and make piston rod be in pressured state always, and to have kept hydraulic cylinder travel be that half of stroke reduced the advantage of the height of complete machine.
Summary of the invention
The purpose of this utility model is: overcome the shortcoming that existing various oil pumpers exist, comprehensive their advantage, existing hydraulic pumping unit is carried out further optimal design, design that a kind of floor space is little, volume is little, weight is little, cost of production is little, easy for installation, the energy-saving hydraulic oil pumper that can realize centralized Control and management simple in structure, propose a kind of design concept that can satisfy the novel energy-conserving oil pumper of offshore oil production requirement, and then solve the problem that China's offshore oilfield later stage mining phase exists.
The technical scheme that its technical problem of the utility model is adopted: offshore platform usefulness gas balanced hydraulic oil extractor is by polished rod eye, movable pulley, flexible linking device, fixed pulley, accumulator, support, composite step formula hydraulic cylinder, sleeve, piston rod and base are formed, composite step formula hydraulic cylinder is equipped with in truss-like internal stent space, the lower end of piston rod is connected with movable pulley, prop up top of the trellis accumulator is housed, flexible linking device is walked around fixed pulley and is connected with polished rod eye with movable pulley one end, the other end is fixed on the support, and described soft bindiny mechanism comprises wire rope, band rope, conveyer belt, chain etc.It is characterized in that: hydraulic cylinder is equipped with in truss-like internal stent space, by sleeve and alignment pin hydraulic cylinder is fixed on the support, accumulator is contained in the top of support, the gas balance has replaced mechanical balance, each two on movable pulley and fixed pulley, the hydraulic drive piston bar moves up and down, and soft bindiny mechanism changes into pumping of piston rod by assembly pulley the linear reciprocating motion of oil pumper suspension point.Wherein two fixed pulley symmetries are installed on the dead axle, and two movable pulley are installed in piston-rod lower end by the moving axis symmetry.The gravity that the pressure that gas produces in the accumulator replaces balance weight to produce, thus realize the gas balance.At different oil recovery conditions, can regulate the interior gas pressure intensity of accumulator and then guarantee that the pressure that gas produces can satisfy the power that oil pumper is wanted balance.
After detailed force analysis, because of the stressed asymmetric distortion that produces, hydraulic cylinder is not fixed on the frame axis but is fixed on the plane that support axis and polished rod eye constitute a side away from polished rod eye for fear of support.
Composite step formula hydraulic cylinder comprises driving oil cylinder, following driving oil cylinder and balance cylinder three parts, and the effective length of balance cylinder equals total effective length of driving oil cylinder and following driving oil cylinder.When under the driving oil cylinder oil-feed on the composite step formula hydraulic cylinder during driving oil cylinder oil return, gas does work to piston in the descent of piston, accumulator, and accumulator releases energy, and the oil pumper suspension point is up; Instantly in the driving oil cylinder oil-feed during driving oil cylinder oil return, piston stroking upward, piston be to gas acting in the accumulator, the accumulator storage power, and the oil pumper suspension point is descending.
The composite step formula hydraulic cylinder of internal stent be the drive system of oil pumper also be the balance sysmte of oil pumper, be connected with a top of the trellis by bolt, be fixed on the support a side away from polished rod eye by sleeve and alignment pin again, the distance that distance bracket deviates from the well head one side equals movable pulley radius+150mm.
The truss-like support is by being bolted on the base, and the base floor space is not more than 2m * 2m.
The beneficial effects of the utility model are, overcome unreasonable on the existing various oil pumper structure design, the design of truss-like frame has reduced complete machine weight and floor space greatly, reducing the wind that frame bears simultaneously carries, make it more be applicable to the offshore oil production that sea wind is bigger, ingenious application to assembly pulley is that piston stroke only is half of oil pumper stroke, has reduced the complete machine height greatly; The gas balance replaces the pouring weight balance to reduce complete machine weight greatly; Simultaneously can realize that the hydraulic power unit centralized Control has not only solved the Hydraulic Circuit Design problem but also improved hydraulicdriven transmission efficiency greatly, improved the surface efficiency of oil pumper, made offshore platform usefulness gas balanced hydraulic oil extractor more remarkable than the energy-saving beam pumping unit energy-saving effect of model of the same race.
Description of drawings
The utility model is described in further detail below in conjunction with accompanying drawing.
Fig. 1 is a left view of the present utility model, represents the relation between movable pulley 3 fixed pulleys 5, accumulator 7, hydraulic cylinder 9 and the support 8 from a side.
Fig. 2 is a front elevation drawing, the position and the annexation of expression offshore platform usefulness gas balanced hydraulic oil extractor overall structure and each component.Especially show the relation between movable pulley 3, fixed pulley 5, accumulator 7, hydraulic cylinder 9 and the support 8.
Fig. 3 is a top view, from the relation between top expression fixed pulley 5, accumulator 7 and the support 8.
Fig. 4 is the operating principle schematic diagram, and hydraulic system 15 is dynamical systems of oil pumper, when under last driving oil cylinder 17 oil-feeds during driving oil cylinder 18 oil returns, and descent of piston, gases do work to piston in the accumulator 7, and accumulator 7 releases energy, and the oil pumper suspension point is up; Instantly in driving oil cylinder 18 oil-feeds during driving oil cylinder 17 oil returns, piston stroking upward, piston be to gases acting in the accumulator 7, accumulator 7 storage power, and the oil pumper suspension point is descending.
Fig. 5 is the engineering half sectional view of composite step formula hydraulic cylinder, the internal construction of expression staged hydraulic cylinder.
1-well head among the figure, 2-polished rod eye, 3-movable pulley, the 4-conveyer belt, 5-fixed pulley, 6-dead axle, the 7-accumulator, 8-support, 9-composite step formula hydraulic cylinder, the 10-sleeve, 11-alignment pin, 12-piston rod, the 13-moving axis, 14-base, 15-hydraulic system, the 16-balance cylinder, the last driving oil cylinder of 17-, driving oil cylinder under the 18-.
The specific embodiment
Consult accompanying drawing 1 and Fig. 2.Offshore platform gas balanced hydraulic oil extractor, polished rod eye 2 connects the sucker rod and the conveyer belt 4 of production wellhead 1.Conveyer belt 4 belongs to one of flexible linking device.Conveyer belt 4 is walked around fixed pulley 5, movable pulley 3, and the other end is fixed on the hanger of a top of the trellis lower end.Support 8 high 1000mm are welded by i iron, angle steel and steel plate.Fixed pulley 5 is fixed on the dead axle 6, and dead axle 6 is installed in support 8 near well head 1 one sides, and dead axle 6 length equate that with support 8 width accumulator 7 is fixed on the support 8 top steel plates, accumulator 7 volume 1m 3, staged composite hydraulic cylinder 9 is connected with support 8 tops by bolt, and in a side that is fixed on by sleeve 10 and pin 11 on the support 8 away from polished rod eye 2, the distance that distance bracket 8 deviates from well head 1 one side equals movable pulley 3 radiuses+150mm.Movable pulley 3 is connected with piston rod 12 by moving axis 13, hydraulic oil piston rod 12 is done and is pumped during work, driving-belt 4 changes into pumping of suspension point to pumping of piston rod 12 by pulley 3 and pulley 5, thereby realizes the whole process of oil pumping.

Claims (8)

1. offshore platform usefulness gas balanced hydraulic oil extractor is made up of polished rod eye, movable pulley, flexible linking device, fixed pulley, accumulator, support, composite step formula hydraulic cylinder, sleeve, piston rod and base, composite step formula hydraulic cylinder is equipped with in truss-like internal stent space, the lower end of piston rod is connected with movable pulley, prop up top of the trellis accumulator is housed, flexible linking device is walked around fixed pulley and is connected with polished rod eye with movable pulley one end, the other end is fixed on the support, and described soft bindiny mechanism comprises wire rope, band rope, conveyer belt, chain etc.; It is characterized in that: hydraulic cylinder is equipped with in truss-like internal stent space, by sleeve and alignment pin hydraulic cylinder is fixed on the support, accumulator is contained in the top of support, the gas balance has replaced mechanical balance, each two on movable pulley and fixed pulley, the hydraulic drive piston bar moves up and down, and soft bindiny mechanism changes into pumping of piston rod by assembly pulley the linear reciprocating motion of oil pumper suspension point.
2. offshore platform gas balanced hydraulic oil extractor according to claim 1: it is characterized in that: the composite step formula hydraulic cylinder of internal stent be the drive system of oil pumper also be the balance sysmte of oil pumper, be connected with a top of the trellis by bolt, be fixed on the support a side away from polished rod eye by sleeve and alignment pin again, the distance that distance bracket deviates from the well head one side equals movable pulley radius+150mm.
3. offshore platform gas balanced hydraulic oil extractor according to claim 1: it is characterized in that: the truss-like support is by being bolted on the base, and the base floor space is not more than 2m * 2m.
4. offshore platform gas balanced hydraulic oil extractor according to claim 1: it is characterized in that: two fixed pulley symmetries are installed on the dead axle.
5. offshore platform gas balanced hydraulic oil extractor according to claim 1: it is characterized in that: two movable pulley are installed in piston-rod lower end by the moving axis symmetry.
6. offshore platform gas balanced hydraulic oil extractor according to claim 1: it is characterized in that: composite step formula hydraulic cylinder comprises driving oil cylinder, following driving oil cylinder and balance cylinder three parts, and the effective length of balance cylinder equals total effective length of driving oil cylinder and following driving oil cylinder.
7. offshore platform gas balanced hydraulic oil extractor according to claim 1: it is characterized in that: the gravity that the pressure that gas produces in the accumulator replaces balance weight to produce, thus realize the gas balance.
8. offshore platform gas balanced hydraulic oil extractor according to claim 1: it is characterized in that: when under the driving oil cylinder oil-feed on the composite step formula hydraulic cylinder during driving oil cylinder oil return, descent of piston, gas does work to piston in the accumulator, and accumulator releases energy, and the oil pumper suspension point is up; Instantly in the driving oil cylinder oil-feed during driving oil cylinder oil return, piston stroking upward, piston be to gas acting in the accumulator, the accumulator storage power, and the oil pumper suspension point is descending.
CN2011201089531U 2011-04-02 2011-04-02 Pneumatic-balance hydraulic pumping unit for offshore platform Expired - Fee Related CN202031549U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011201089531U CN202031549U (en) 2011-04-02 2011-04-02 Pneumatic-balance hydraulic pumping unit for offshore platform

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011201089531U CN202031549U (en) 2011-04-02 2011-04-02 Pneumatic-balance hydraulic pumping unit for offshore platform

Publications (1)

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CN202031549U true CN202031549U (en) 2011-11-09

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102182429A (en) * 2011-04-02 2011-09-14 中国石油大学(华东) Air balance hydraulic pumping unit for offshore platform
CN106089157A (en) * 2016-08-23 2016-11-09 山东威马泵业股份有限公司 Accumulation of energy balance type hydraulic pumping unit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102182429A (en) * 2011-04-02 2011-09-14 中国石油大学(华东) Air balance hydraulic pumping unit for offshore platform
CN102182429B (en) * 2011-04-02 2014-04-02 中国石油大学(华东) Air balance hydraulic pumping unit for offshore platform
CN106089157A (en) * 2016-08-23 2016-11-09 山东威马泵业股份有限公司 Accumulation of energy balance type hydraulic pumping unit
CN106089157B (en) * 2016-08-23 2018-03-13 山东威马泵业股份有限公司 Accumulation of energy balance type hydraulic pumping unit

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GR01 Patent grant
C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20111109

Termination date: 20120402