CN103104221A - Improved down-hole device of oil well thinner tubing pump and working method thereof - Google Patents
Improved down-hole device of oil well thinner tubing pump and working method thereof Download PDFInfo
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- CN103104221A CN103104221A CN 201110370135 CN201110370135A CN103104221A CN 103104221 A CN103104221 A CN 103104221A CN 201110370135 CN201110370135 CN 201110370135 CN 201110370135 A CN201110370135 A CN 201110370135A CN 103104221 A CN103104221 A CN 103104221A
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Abstract
The invention discloses an improved down-hole of an oil well thinner tubing pump. The improved down-hole device of the oil well thinner tubing pump is mainly composed of an upper plunger (1) and a lower plunger (2). The upper plunger (1) and the lower plunger (2) are mutually communicated through a transform device (3). Further disclosed is a working method of the improved down-hole device. The improved down-hole of the oil well thinner tubing pump and the working method of the improved down-hole device are applicable to the oil well thinner tubing pump, and mainly achieve mixing of injection fluid and formation fluid below a fixed valve. According to improvement in structure, working efficiency of the oil well thinner tubing pump is improved, and then exploiting efficiency of a whole oil well is improved.
Description
Technical field
The present invention relates to a kind of modified downhole hardware and method of work thereof of oil well thinner tubing pump.
Background technology
Along with Gong the utilization of conventional oil reduces day by day, heavy oil is becoming the next century mankind's important energy source.Through the effort of more than 20 years, global heavy oil industry had than conventional oil development speed faster, and the annual production of viscous crude, sand asphalt rises to nearly hundred million tons by 2,000 ten thousand tons, and its importance receives people's concern day by day.The difficulty of heavy crude reservoir exploitation is mainly manifested in two aspects: the viscosity of viscous crude is high on the one hand, and the filtrational resistance of viscous crude in oil reservoir is large, makes viscous crude not flow into the shaft bottom from oil reservoir; Even on the other hand under reservoir condition, viscous crude can flow into the shaft bottom, but in the process of vertical lifting, impact due to viscous crude factor such as degassed and radiating and cooling in pit shaft, make the viscosity of viscous crude further increase, have a strong impact on the normal operation of the mobile and oil well production equipment of formation fluid in pit shaft.
According to the interrelated data statistics, explored heavy oil resource mainly concentrates on the states such as Venezuela, the former Soviet Union, the U.S. and Canada in the world at present.The Orinoco heavy oil belt of Venezuela northeast is examined oil in place and is reached more than 3,000 hundred million tons.Half of U.S.'s heavy oil resource is distributed in Gary Fu Niya, nearly 40,000,000,000 tons of oil in place, remaining half be distributed in the continent, middle part.Canadian heavy oil resource mainly is distributed in four major sedimentary mineral reserve such as Athabasca, cold air lake, dimension Pascal and this river of Alberta, nearly 1,500 hundred million tons of oil in place.The heavy oil resource of the former Soviet Union mainly is distributed in more than 200 hundred million tons of the Ba Sainuofuyue in West Siberia basin, comprises that also there is extremely abundant viscous crude resource in other country of China.Total oil in place of these heavy oil resources adds up more than 6,000 hundred million tons, and in the world conventional oil verify 3,600 hundred million tons of oils in place, its recoverable reserves is only 90,000,000,000 tons.
The viscous crude stock number that China has found is also very abundant, and oneself has more than 20 the viscous crude field of discovery, is distributed in the areas such as the Liaohe River, triumph, Xinjiang, huge port, Jilin, more than estimating that Chinese heavy petroleum asphalt stock number can reach 300 * 108t.China's viscous crude (highly viscous oil, viscosity is more than 0.1Pas) resource distribution is very wide, and oil in place reaches 164 * 108t, and wherein the land viscous crude accounts for more than 20% of oil total resources.The outstanding characteristics of viscous crude are that asphalitine, gum level are higher.Colloid, the heavy oil production that asphalt content is higher account for 7% of viscous crude total output.
Connect the area in Daqing oil field, Henan, Inner Mongol two in recent years and found important heavy crude reservoir; Also find the viscous crude resource in areas such as Jianghan Oil-field, little, the Northwest Sichuan of peace.Heavy crude reservoir oil in place explored and that control has surpassed national common thin oil reserves, estimates also to have from now on new growth.
In the proved reserves of CNPC, common heavy oil accounts for 74.7%, and special thick Shan accounts for 14.4%, and super viscous crude accounts for 10.9%.
Countries in the world mainly rely on traditional thermal methods to the exploitation of high viscosity heavy oil at present, i.e. steam soak and steam flooding.The supporting technology that China's great majority adopt steam soak and pit shaft to mix thin oil is recovered the oil.This method not only consumes a large amount of fuel, but also consumes a large amount of thin oils, thereby has increased widely cost for oil production.Have bibliographical information can use the Emulsifying heavy crude producing, this method is that aqueous surfactant solution is annotated the down-hole, makes full-bodied viscous crude change low viscous oil-in-water emulsion extraction into.Reducing viscosity by emulsifying is high due to its viscosity break ratio, cost is low, easy operating, and at home and abroad all there is use in the oil field at present.But the emulsifying pour depressor that uses at present only possesses single heatproof or anti-rock salt performance, namely heatproof again the emulsifying pour depressor of anti-rock salt research and development also seldom.
The reducing viscosity by emulsifying production practice is to set up the viscosity reduction flow process in the oil-gas gathering and transportation of ground.According to the difference of adding medicine point, can be divided into individual well reducing viscosity by emulsifying, many wells of measuring station reducing viscosity by emulsifying and three kinds of ground flows of large tracts of land centralized management reducing viscosity by emulsifying; Different according to chemical agent and crude oil mixing point can be divided into again reducing viscosity by emulsifying technology in ground reducing viscosity by emulsifying and pit shaft.
The individual well reducing viscosity by emulsifying is in the well mouth of oil well dosing, then thinner is mixed oil sets annular space (or in hollow rod).Many wells of measuring station reducing viscosity by emulsifying is for the ease of centralized management, completes dosing, pressurization, heating and metering at the measuring station main pipe line, and then is assigned to each well, reaches the purpose of viscosity reduction.Large tracts of land centralized management reducing viscosity by emulsifying is to carry out dosing at block station, and the advantage of this mode is: equipment is simple, is easy to centralized management.
Ground reducing viscosity by emulsifying method is applicable to that oil well can normally be produced, the oil well of flow difficulties in the surface gathering and transferring pipeline.Crude oil mixes forming emulsion with activator solution through the well head oil water mixer after the oil well output, be transported to oil gathering station by petroleum pipeline.In pit shaft, reducing viscosity by emulsifying technique is that packer and ball-and-seat are housed on oil pipe, thinner solution by the oil jacket annular space by ball-and-seat enter oil pipe and with emulsification of crude oil (or hollow rod adds thinner and emulsification of crude oil), reach the purpose of viscosity reduction.According to the relative position of ball-and-seat and oil well pump, this technology can be divided into again on pump reducing viscosity by emulsifying under reducing viscosity by emulsifying and pump.
Reducing viscosity by emulsifying technical requirements thinner concentration of aqueous solution is wanted suitably can not form oil-in-water emulsion if concentration is too low; The further amplitude that descends of emulsion viscosity is little, uneconomical for excessive concentration.And some chemical agent (as caustic soda, water glass etc.), easily form WO emulsion when high concentration, viscosity of crude is raise.Temperature is little to established emulsion viscosity influence, but it affects emulsifying effectiveness.Experiment shows, along with temperature raises, emulsifying effectiveness improves.The water liquor ratio refers to the ratio of active water and production fluid total amount, and it directly affects type, viscosity and the well oil output of emulsion.The depth of dusting power drug agent point position will directly affect the flow resistance of wellbore fluids and efficient and the benefit situation of oil well production system.Reasonably dusting power drug point position must guarantee that the flox condition of wellbore fluids obtains improving preferably the high efficiency with oil well production, and satisfies the requirement of capacity of equipment.
In the oil mining process, usually use oil well thinner tubing pump, in the oil well thinner tubing pump course of work, the quality of its downhole hardware will directly have influence on its operating efficiency.
Summary of the invention
The object of the invention is to overcome the shortcoming and defect of above-mentioned prior art, a kind of modified downhole hardware of oil well thinner tubing pump is provided, this modified downhole hardware is applicable to oil well thinner tubing pump, mainly complete and inject fluid and mix with formation fluid below standing valve, by structural improvement, thereby improved the operating efficiency of oil well thinner tubing pump, and then improved the production efficiency of whole oil well.
Another object of the present invention has been to provide a kind of method of work based on said apparatus.
Purpose of the present invention is achieved through the following technical solutions: the modified downhole hardware of oil well thinner tubing pump, mainly consisted of by upper plug and lower plunger, and described upper plug and lower plunger are interconnected by conversion equipment.
Described conversion equipment is universal joint.
Described upper plug inside is provided with hollow rod.
The lower end port of described upper plug is provided with fixedly one way valve, and the inside of upper plug is provided with the one way valve that moves about.
Method of work based on said apparatus is characterized in that, comprises the following steps:
(a) at first, fluid enters down-hole pump through the integral joint pipe of 25mm;
(b) then, fluid injects hollow rod continuously;
(c) last, aqueous surfactant solution is delivered to the bottom of pump by a pipe on upper plug.
In sum, the invention has the beneficial effects as follows: be applicable to oil well thinner tubing pump, mainly complete and inject fluid and mix with formation fluid below standing valve, by structural improvement, thereby improved the operating efficiency of oil well thinner tubing pump, and then improved the production efficiency of whole oil well.
Description of drawings
Fig. 1 is structural representation of the present invention.
The specific embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited only to this.
Embodiment:
As shown in Figure 1, the modified downhole hardware of the oil well thinner tubing pump that the present embodiment relates to mainly is made of upper plug 1 and lower plunger 2, and described upper plug 1 and lower plunger 2 are interconnected by conversion equipment 3.
Described conversion equipment 3 is universal joint.
Described upper plug 1 inside is provided with hollow rod 4.
The lower end port of described upper plug 1 is provided with fixedly one way valve 5, and the inside of upper plug 1 is provided with the one way valve 6 that moves about.
The present invention mainly completes and injects fluid and mix with formation fluid below standing valve, and its course of work is: the integral joint pipe that fluid passes through 25mm enters down-hole pump.Pump is comprised of the double plunger system, and fluid injects hollow rod continuously, then aqueous surfactant solution is delivered to the bottom of pump by a pipe on upper plug.Before production liquid (formation fluid) enters standing valve, through mechanical agitation, they are fully mixed like this, form low viscous oil-in-water (O/W) type emulsion, to reach the purpose of viscosity reduction.
The above is only preferred embodiment of the present invention, is not the present invention is done any pro forma restriction, and every foundation technical spirit of the present invention, any simple modification, equivalent variations that above embodiment is done are within all falling into protection scope of the present invention.
Claims (5)
1. the modified downhole hardware of oil well thinner tubing pump, is characterized in that, mainly is made of upper plug (1) and lower plunger (2), and described upper plug (1) and lower plunger (2) are interconnected by conversion equipment (3).
2. the modified downhole hardware of oil well thinner tubing pump according to claim 1, is characterized in that, described conversion equipment (3) is universal joint.
3. the modified downhole hardware of oil well thinner tubing pump according to claim 1, is characterized in that, described upper plug (1) inside is provided with hollow rod (4).
4. the modified downhole hardware of oil well thinner tubing pump according to claim 1, it is characterized in that, the lower end port of described upper plug (1) is provided with fixedly one way valve (5), and the inside of upper plug (1) is provided with the one way valve that moves about (6).
5. based on the method for work of said apparatus, it is characterized in that, comprise the following steps:
(a) at first, fluid enters down-hole pump through the integral joint pipe of 25mm;
(b) then, fluid injects hollow rod continuously;
(c) last, aqueous surfactant solution is delivered to the bottom of pump by a pipe on upper plug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110370135 CN103104221A (en) | 2011-11-09 | 2011-11-09 | Improved down-hole device of oil well thinner tubing pump and working method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110370135 CN103104221A (en) | 2011-11-09 | 2011-11-09 | Improved down-hole device of oil well thinner tubing pump and working method thereof |
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| CN103104221A true CN103104221A (en) | 2013-05-15 |
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| CN 201110370135 Pending CN103104221A (en) | 2011-11-09 | 2011-11-09 | Improved down-hole device of oil well thinner tubing pump and working method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111101899A (en) * | 2018-10-29 | 2020-05-05 | 中国石油化工股份有限公司 | Oil sleeve annulus dosing lifting device and method |
| CN111520115A (en) * | 2020-03-31 | 2020-08-11 | 东营市朝阳石油科技有限公司 | Zero-clearance oil-gas mixed pumping device and method |
-
2011
- 2011-11-09 CN CN 201110370135 patent/CN103104221A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111101899A (en) * | 2018-10-29 | 2020-05-05 | 中国石油化工股份有限公司 | Oil sleeve annulus dosing lifting device and method |
| CN111520115A (en) * | 2020-03-31 | 2020-08-11 | 东营市朝阳石油科技有限公司 | Zero-clearance oil-gas mixed pumping device and method |
| CN111520115B (en) * | 2020-03-31 | 2022-04-29 | 东营市朝阳石油科技有限公司 | Zero-clearance oil-gas mixed pumping device and method |
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Application publication date: 20130515 |