CN1077514A - The dewaxing method of oil country tubular good and device thereof - Google Patents
The dewaxing method of oil country tubular good and device thereof Download PDFInfo
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- CN1077514A CN1077514A CN 92106130 CN92106130A CN1077514A CN 1077514 A CN1077514 A CN 1077514A CN 92106130 CN92106130 CN 92106130 CN 92106130 A CN92106130 A CN 92106130A CN 1077514 A CN1077514 A CN 1077514A
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- single current
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Abstract
Dewaxing method provided by the invention injects hot cleaning fluid from well head, be positioned at series connection single current packer on the oil pick-up tube of wax deposition layer bottom, and this packer flows directly in the pipe cleaning fluid with the cleaning fluid packing time, and discharges cleaning fluid from the oil pick-up tube of well head.The single current packer that is provided comprises lower contact and cylindrical shell, and cylindrical shell is provided with single current temperature-sensing valve and expander and constitutes.The present invention flows directly in the oil pick-up tube at wax deposition layer position without the shaft bottom because of the cleaning fluid that is injected, thereby it is few to have remarkable, a used cleaning fluid of wax removal effect, and can avoid cleaning fluid to oil layer pollution.
Description
The present invention relates to the dewaxing method of oil country tubular good in the Petroleum Production and isolated plant, and this method is cleaned for hot washing lotion is directly injected oil pick-up tube without the shaft bottom, and the device that is provided plays the effect of packing and single current when injecting cleaning fluid.
Paraffin deposit is the problem that often runs in crude oil production in crude oil production, and factor such as the pressure on paraffin content, water content and stratum in its wax deposition amount and wax deposition position and the crude oil, temperature is relevant.When these factors changed, paraffin will condensation come out and be deposited on tube inner wall or the sucker rod from crude oil, thereby caused oil flow resistance to increase, even blocked oil flow channel.Mainly contain in existing wax removal measure that chemicals wax removal, machinery are scraped and washed, electrothermal paraffin removal, magnetic paraffin control, heat clean wax etc., and generally adopts heat to wash mode at present.The cleaning fluid that is about to heat flows into the annular space of oil well and oil pick-up tube from well head, in the shaft bottom flows into oil pick-up tube, and returns again along oil pick-up tube and to arrive outer wellhead, thereby reach the wax removal purpose.It is just effective when cleaning fluid passes through oil pick-up tube that this heat is washed measure, but because oil well is generally darker, reach 2000～3000 meters, even it is darker, thereby not only based on more, the long flow path of cleaning fluid injection rate of water, and cleaning fluid easily flows into the work plane of oil reservoir because of its pressure, and causes polluted reservoir.Therefore, when cleaning or after cleaning, must take the water-oil separating measure from the liquid that oil pick-up tube is discharged, and its mask work amount is generally bigger at every turn.In fact, paraffin is not to be deposited in the whole pipe, generally is deposited near the lower underground cold water layer of temperature, and promptly more than 800～1000 meters well depth places, its cold water layer is different because of the hydrogeological situation of locality.This shows, flow directly near the wax deposition layer the pipeline, like this, not only can further improve wax removal effect, energy conservation, but also can avoid the pollution of oil reservoir if change the existing heat measure of washing into cleaning fluid.
In view of existing weak point in the prior art, purpose of the present invention directly enters method and the isolated plant that oil pick-up tube wax deposition section is carried out wax removal for providing a kind of with hot washing lotion, thereby shorten the flow process of cleaning fluid greatly, with further raising wax removal effect, energy conservation, and avoid pollution to oil reservoir.
The dewaxing method of oil country tubular good provided by the invention and device thereof reach by following technical proposals to achieve these goals:
Be positioned at series connection single current packer on the oil pick-up tube of wax deposition layer bottom, the cleaning fluid that injects heat from well head flows down along the annular space of oil pick-up tube outer wall with the formation of oil well inwall, cleaning fluid and is discharged cleaning fluid again on the oil pick-up tube of well head in the single current packer flows into oil pick-up tube.
Can adopt traditional cleaning fluid and injection mode according to the above-mentioned cleaning fluid that dewaxing method injected, promptly according to shown in Figure 1, send into heater (3) after by water pump (1) water being filtered through filter (2), enter reactor (4) after the heating, can add the surfactant or the catalyzer that are beneficial to wax removal in the reactor, and cleaning fluid is flow into annular space between oil pick-up tube (6) outer wall and oil well (5) inwall.Be series at single current packer (7) on the oil pick-up tube and be positioned at the bottom of wax deposition layer, generally closely descend the cold water layer.When this packer flows to when the higher cleaning fluid of temperature, under the temperature of cleaning fluid and pressure effect, open the annular space that to seal in the bypass valve between oil pick-up tube outer wall and oil well inwall, thereby make the cleaning fluid packing on a certain position of oil well, and directly flow in the oil pick-up tube by the bypass valve of packer, the cleaning fluid that enters in the oil pick-up tube dissolves and the discharge well head along the wax of inside pipe wall with condensation, delivers to knockout tower (8) by the pipeline of well head and carries out water-oil separating.
The present invention realizes by following scheme in order to realize the special-purpose single current packer that above-mentioned dewaxing method provides: this device comprises the top connection and the lower contact of cylindrical shell and duct coupling, barrel wall between the last lower contact is provided with single current temperature-sensing valve and expander, the single current temperature-sensing valve contains temperature-sensitive element and valve rod is formed, one end of single current temperature-sensing valve is provided with and the extraneous circulation road that connects of cylindrical shell along tube wall, and the other end of single current temperature-sensing valve is provided with the circulation road that connects with cylinder lumen.
2～5 further described in conjunction with the accompanying drawings according to the special-purpose single current packer that said structure provided:
According to structure shown in Figure 2, Fig. 3, Fig. 4 are A-A and B-B portion face structural representation.This device is made up of top connection (11), lower contact (24) and cylindrical shell (10), and barrel wall is provided with single current temperature-sensing valve (17) and expander (9).Expander is made up of gum cover (21), inflating medium (20) and helix tube (19), and helix tube is by inflating medium, and its end connects with cylinder lumen, and the circulation road of the other end of helix tube and single current temperature-sensing valve connects.By shelves rings (16) and ring washer (12) magnet (15) is set on the circulation road of single current temperature-sensing valve upper end, the communication port (14) with external world's perforation that is positioned at ring washer is located by outer cylinder body (18) the current-carrying shelves ring of being made by rubber (13) to be set.
The structure of single current temperature-sensing valve is according to shown in Figure 5, temperature-sensitive element (25), valve rod (26), spheroid (27) and spring (28) are arranged in the pipe (29) and form, temperature-sensitive element adopts the spring of being made by memorial alloy, pipe between valve rod and the spheroid is provided with the boss compatible with spheroid form, and the spheroid below is provided with compressed spring (28).
According to the single current packer that said structure provided, the single current temperature-sensing valve is arranged 6 according to shown in Figure 4, and the helix tube that links to each other with each single current temperature-sensing valve all connects with cylinder lumen.When injecting cleaning fluid, cleaning fluid enters magnetised section through the circulation road with external world's perforation, and this magnetised section is folded to fall to constituting for annular magnet (15) is set on barrel, and it is that neodymium-iron-boron magnetic material constitutes that this magnet can adopt R-Fe-B.The cleaning fluid that is magnetized at magnetised section enters the temperature-sensitive element of single current temperature-sensing valve, and the temperature-sensitive element expanded by heating makes valve rod (26) back down spheroid (27), and cleaning fluid is flow in the oil pick-up tube along helix tube.Wash liquid stream inflating medium expanded by heating and gum cover is outwards expanded when helix tube causes this gum cover to seal annular space between oil pick-up tube outer wall and oil well inwall.When liquid to be cleaned stops to inject, the state that inflating medium withdrawal is original, gum cover also returns to original state thereupon, and the temperature-sensitive element in the single current temperature-sensing valve also is withdrawn into original position, and spheroid is sealed valve port (30) again under the effect of spring.
According to the above-mentioned single current packer that structure provided, it is that memorial alloy or Ti-Ni are memorial alloy that temperature-sensitive element can adopt Cu-Zn-Al, and temperature-sensitive element made spring-like, thereby this temperature sensing spring is in contraction state when environment temperature does not surpass critical-temperature, when environment temperature meets or exceeds critical-temperature, be in swelling state, and spheroid is had spring force.Inflating medium in the expander is by methyl acetate, methyl alcohol, alkanes solid mixture and mix memory alloy wire, copper powder etc. and constitute, and wherein the alkanes solid can adopt spermaceti.The inflating medium that is made of above-mentioned material is when expanding when cleaning fluid is heated because of injecting, and is withdrawn into original state because of environment reduces when stopping to inject liquid.The purpose that adds copper powder in the inflating medium is to help to conduct heat, thereby the helix tube that is positioned at expander should adopt the good conductor of heat conductivility, as copper pipe, and, equally also help making inflating medium easily to accept to come from the outer field heat of gum cover as containing wire in the outer field gum cover layer of expander.Set upright pin (23) by steel bushing (22) setting and be positioned on the cylindrical shell of expander bottom, this sets upright the position that pin helps the relative oil well inwall of single current packer is in the center, thereby helps improving the packing effect of expander more.Expander leaves the space between its outer wall and the oil well inwall when stopping to inject cleaning fluid or not carrying out wax removal, thus in process of oil production to the detection of oil reservoir, be unlikely obstruction during as ultrasonic listening.
In order to realize the purpose of dewaxing method provided by the present invention, special-purpose single current packer provided by the invention can also be further accomplished by following manner.
According to structure shown in Figure 6, this device comprises cylindrical shell (32) and is used for the top connection (33) and the lower contact (47) of duct coupling, barrel wall on it between lower contact is provided with single current temperature-sensing valve and expander, one end of single current temperature-sensing valve is provided with and the extraneous circulation road that connects of cylindrical shell along tube wall, and the other end of single current temperature-sensing valve is provided with the circulation road that connects with cylinder lumen.By shelves rings (36) and ring washer magnet (35) is set on the circulation road of single current temperature-sensing valve upper end, and is positioned at the current-carrying shelves ring of making by rubber with communication port place setting external world's perforation (34) ring washer.It is that the ringshaped magnet that NdFeB material is made is that preface folds to fall to constituting with the same sex by adjacent magnetic that magnet (35) adopts R-Fe-B, and this magnet helps improving the wax removal effect after cleaning fluid is magnetized.
The single current temperature-sensing valve by temperature-sensitive element (37), and ring-type valve rod (41) constitute, and the cylindrical shell that is positioned at the ring-type valve rod is provided with the communication port (39) that connects with cylinder lumen, the lower end of ring-type valve rod (41), the outside is for being the column cone.Be positioned near the cylindrical shell the communication port O-ring seal (40) is set, and seal communication port by the ring-type valve rod.Expander is made up of expand seat (43) and gum cover, and gum cover (42) is set in outside the seat that expands, and the top of the seat that expands is flap, and the bottom and the gum cover lower seal of the seat that expands are fixed, and are provided with spring (44) between expansion seat and cylindrical shell.
Temperature-sensitive element is made of hollow metal tube and casing pack inflating medium, and this temperature-sensitive element around cylindrical shell in the shape of a spiral shape be arranged between cylindrical shell and the outer cylinder body (31).Inflating medium in the temperature-sensitive element adopts by the mixture of methyl acetate, methyl alcohol, spermaceti and mixes memory alloy particle, copper powder etc. and constitutes, and metal tube adopts the good material of heat conductivility, as copper pipe or stainless steel tube etc.Expansion because of inflating medium when this temperature-sensitive element is heated expands the central axis direction of metal tube along its spiral, and promotion ring-type valve rod, the ring-type valve rod overcomes spring (44) pressure and enters in the seat that expands, the flap part of seat of thereupon will expanding outwards dilates, and gum cover expands thereupon and pastes mutually with the oil well inwall, thereby plays the packing effect.When the environment temperature of temperature-sensitive element reduces, make metal tube return to original state because of inflating medium shrinks, and this moment, the ring-type valve rod was got back to original position with its top under the effect of spring (44), expander also returns to original state thereupon.When initial injection cleaning fluid in order to make temperature-sensitive element accept the heat of cleaning fluid smoothly, be positioned on the outer cylinder body at temperature-sensitive element place, be provided with bypass port (38), and the communication port (39) that this bypass port part cleaning fluid when the expander packing can also enter cylindrical shell thus.Be positioned on the cylindrical shell of expander lower end and set upright pin (46), on the position that is beneficial to make expander be in the center by steel bushing (45) setting.
The present invention is by dewaxing method and isolated plant thereof that foregoing description provided, when having realized the injection cleaning fluid cleaning fluid is directly entered oil country tubular good without the shaft bottom and tie cured position, thereby avoided the pollution of cleaning fluid on the one hand to oil reservoir, alleviated the water-oil separating workload on the other hand, and compare cleaning with existing cleaning method and simplify more, used cleaning fluid significantly reduces, and cleaning performance is more remarkable.In addition because the above-mentioned technique effect that has, the present invention when cleaning energy-saving effect and improve aspect such as oil production and will bring outstanding more economic effect because of shortening the cleaning frequency.
Description of drawings:
Fig. 1 is for showing oil country tubular good dewaxing method provided by the invention, its process flow diagram;
Fig. 2 is for showing single current packer construction schematic diagram provided by the invention;
Fig. 3 is for pressing A-A generalized section shown in Figure 2;
Fig. 4 is for pressing B-B generalized section shown in Figure 2;
Fig. 5 is for pressing single current temperature-sensing valve (17) partial structurtes enlarged diagram shown in Figure 2;
Fig. 6 is for showing the another kind of structural representation of single current packer provided by the invention.
Claims (10)
1, a kind of dewaxing method of oil country tubular good, it is characterized in that being positioned at series connection single current packer on the oil pick-up tube of wax deposition layer bottom, the cleaning fluid that injects heat from well head flows down along the annular space between oil pick-up tube outer wall and oil well inwall, this cleaning fluid flows in the oil pick-up tube after the single current packer is by packing, and discharges cleaning fluid again on the oil pick-up tube of well head;
2, a kind of single current packer comprises cylindrical shell and is used for the top connection and the lower contact of duct coupling, it is characterized in that the barrel wall between the lower contact is provided with single current temperature-sensing valve and expander, the single current temperature-sensing valve comprises temperature-sensitive element and valve rod, one end of single current temperature-sensing valve is provided with and the extraneous circulation road that connects of cylindrical shell along tube wall, and the other end of single current temperature-sensing valve is provided with the circulation road that connects with cylinder lumen;
3, according to the described packer of claim 2, it is characterized in that the single current temperature-sensing valve by temperature-sensitive element, valve rod, spheroid and spring be arranged at the pipe in and constitute, pipe between valve rod and the spheroid is provided with the boss compatible with spheroid form, the spheroid below is provided with compressed spring, and temperature-sensitive element adopts the spring of being made by memorial alloy;
4, according to the described packer of claim 3, it is characterized in that expander is made up of gum cover, inflating medium and helix tube, helix tube is by inflating medium, and it is terminal to connect with cylinder lumen, and the circulation road of the other end of helix tube and single current temperature-sensing valve connects;
5, according to the described packer of claim 2, it is characterized in that the single current temperature-sensing valve is made up of temperature-sensitive element and ring-type valve rod, the cylindrical shell that is positioned at the ring-type valve rod is provided with the communication port that connects with cylinder lumen, and the outside, lower end of ring-type valve rod is for being the column cone;
6, according to the described packer of claim 5, it is characterized in that expander is made up of expand seat and gum cover, gum cover is set in the outside of the seat that expands, and the top of expanding is flap, the bottom and the gum cover lower seal of expansion seat are fixed, and are provided with spring between expansion seat and cylindrical shell;
7,, it is characterized in that inflating medium is by methyl acetate, methyl alcohol, alkanes solid mixture and mix memory alloy wire, copper powder etc. and constitute according to claim 2,3 or 4 described packers;
8, according to claim 2,5 or 6 described packers, it is characterized in that temperature-sensitive element is by hollow metal tube and casing pack inflating medium and constitute, this metal tube around cylindrical shell in the shape of a spiral shape be arranged between cylindrical shell and the outer cylinder body, its inflating medium adopt by methyl acetate, methyl alcohol, spermaceti mixture and mix memory alloy particle, copper powder constitutes;
9, according to claim 2,3,4,5 or 6 described packers, it is characterized in that by shelves ring and ring washer magnet being set on the upper end circulation road of single current temperature-sensing valve, this magnet is for being that the ringshaped magnet that NdFeB material is made is that preface folds to fall to constituting with the same sex by adjacent magnetic by R-Fe-B, and the current-carrying shelves ring made by rubber by the outer cylinder body setting of the communication port place that connects with the external world that is positioned at ring washer;
10,, it is characterized in that being positioned on the cylindrical shell of expander lower end and set upright pin by the steel bushing setting according to the described packer of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92106130 CN1026810C (en) | 1992-04-14 | 1992-04-14 | Dewaxing method for oil well pipe and its equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92106130 CN1026810C (en) | 1992-04-14 | 1992-04-14 | Dewaxing method for oil well pipe and its equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1077514A true CN1077514A (en) | 1993-10-20 |
| CN1026810C CN1026810C (en) | 1994-11-30 |
Family
ID=4941824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92106130 Expired - Fee Related CN1026810C (en) | 1992-04-14 | 1992-04-14 | Dewaxing method for oil well pipe and its equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1026810C (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1048311C (en) * | 1996-12-16 | 2000-01-12 | 胜利石油管理局河口采油厂 | Oil-well self hot-washing wax-removing method and apparatus thereof |
| CN100443197C (en) * | 2001-09-13 | 2008-12-17 | 刘勇 | Automatic intellectual delermining and controlling method and apparatus for dewaxing procedure |
| CN107387047A (en) * | 2017-08-03 | 2017-11-24 | 中国石油天然气股份有限公司 | Fireflood is segmented tubing string and igniting inflating method |
| CN108119098A (en) * | 2017-11-15 | 2018-06-05 | 中国石油天然气集团公司 | Well-head wax removal device and method |
| CN108590583A (en) * | 2018-03-30 | 2018-09-28 | 中国神华能源股份有限公司 | Well washing apparatus |
| CN108843273A (en) * | 2018-07-02 | 2018-11-20 | 中国石油天然气股份有限公司 | Well-washing device, Flushing tubular column and pumping and washing process in covering |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1308567C (en) * | 2005-03-21 | 2007-04-04 | 中国海洋石油总公司 | Fluid backward injection short joint |
-
1992
- 1992-04-14 CN CN 92106130 patent/CN1026810C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1048311C (en) * | 1996-12-16 | 2000-01-12 | 胜利石油管理局河口采油厂 | Oil-well self hot-washing wax-removing method and apparatus thereof |
| CN100443197C (en) * | 2001-09-13 | 2008-12-17 | 刘勇 | Automatic intellectual delermining and controlling method and apparatus for dewaxing procedure |
| CN107387047A (en) * | 2017-08-03 | 2017-11-24 | 中国石油天然气股份有限公司 | Fireflood is segmented tubing string and igniting inflating method |
| CN107387047B (en) * | 2017-08-03 | 2019-08-06 | 中国石油天然气股份有限公司 | Fireflood is segmented tubing string and igniting inflating method |
| CN108119098A (en) * | 2017-11-15 | 2018-06-05 | 中国石油天然气集团公司 | Well-head wax removal device and method |
| CN108119098B (en) * | 2017-11-15 | 2020-07-10 | 中国石油天然气集团公司 | Wellhead paraffin removal device and method |
| CN108590583A (en) * | 2018-03-30 | 2018-09-28 | 中国神华能源股份有限公司 | Well washing apparatus |
| CN108843273A (en) * | 2018-07-02 | 2018-11-20 | 中国石油天然气股份有限公司 | Well-washing device, Flushing tubular column and pumping and washing process in covering |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1026810C (en) | 1994-11-30 |
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