CN203626665U - Downhole feeder for temporary blocking and energization processing of heavy oil steam huff and puff well - Google Patents
Downhole feeder for temporary blocking and energization processing of heavy oil steam huff and puff well Download PDFInfo
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- CN203626665U CN203626665U CN201320652589.4U CN201320652589U CN203626665U CN 203626665 U CN203626665 U CN 203626665U CN 201320652589 U CN201320652589 U CN 201320652589U CN 203626665 U CN203626665 U CN 203626665U
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- hole
- stifled
- temporarily
- feed appliance
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Abstract
The utility model provides a downhole feeder for temporary blocking and energization processing of a heavy oil steam huff and puff well. The downhole feeder comprises a pipe body, wherein a space for containing solid temporary-blocking materials is formed in the pipe body, a box coupling is arranged at the upper end of the pipe body, a pin is arranged at the lower end of the pipe body, and a limiting steel ring is arranged inside the pipe body in a welding mode, is arranged at the position close to the pin, and is used for bearing the weight of the solid temporary-blocking materials. When the downhole feeder is used, the solid temporary-blocking materials can be fed to the downhole position needing the solid temporary-blocking materials in an accurate positioning mode, temporary blocking and energization processing can be carried out, pertinence is high, construction is easy, multiple effects are integrated, the cost is low, and the remarkable energization effect can be achieved.
Description
Technical field
The utility model is that the one stifled acidifying temporarily that development late stage takes in order to increase oil of handling up increases oil tech about viscous crude, specifically about a kind of thickened oil steam-stimulated well temporarily stifled energization process the down-hole feed appliance of use, belong to heavy oil development technical field.
Background technology
The heavy crude reservoir development late stage of handling up, ubiquity poor efficiency well increases, the situation of the obvious variation of economic benefit; Steam is handled up repeatedly at the oil reservoir of good penetrability, and some oil reservoirs cannot effectively be employed; Strata pressure is low, the contradiction such as does not go out after usually causing steam injection to drive a well.Although have a lot of reported in literature to propose from different perspectives solution at present, due to many-sided reasons such as cost, technology, safety, have limitation separately.
In prior art, be also of all shapes and colors for the temporary plugging technique of oil well, be useful on drilling well, be useful on pressure break, be useful on well, be also useful on temporarily stifled profile control etc.For example: the Chinese patent application that application number is 00102576.7 discloses a kind of diverting agent that utilizes waste polyolefine to prepare; The Chinese patent application of application number 91101010.6 discloses a kind of Temperarily blocking agent for water soluble stratum; The Chinese patent application of application number 93114648.8 discloses a kind of temporary plugging technique of injection distribution working construction of oil field; The Chinese patent application of application number 99113250.5 discloses a kind of high-temperature temporary blocking agent and preparation method thereof; The Chinese patent application of application number 200410009408.1 discloses a kind of water-solubility acidity temporary plugging agent for press cracking; The Chinese patent application of application number 200510072118.6 discloses a kind of Hydrolysiable high elastic well remending liquid temperary blocking agent; The Chinese patent application of application number 200910082151.5 discloses a kind of preparation method of the profile control agent for oil field deep temporary blocking; The Chinese patent application of application number 200910086548.1 discloses a kind of high-strength temporary blocking agent and preparation method thereof; The Chinese patent application of application number 200910090931.4 discloses a kind of temporary plugging agent for acidization; The Chinese patent application of application number 200910237814.6 discloses the high controllable gelout chemical temporary plugging liquid rubber stopper of a kind of intensity; The Chinese patent application of application number 200910242178.6 discloses a kind of hyposmosis thixotropic gel temporary plugging agent for acidifying oil layer of oil field and preparation and application; The Chinese patent application of application number 200910243764.2 discloses a kind of preparation method of slow-release rubber breaking agent for chemical temporary-plugging rubber plug; The Chinese patent application of application number 201010130407.8 discloses a kind of diverting agent for high temperature oil gas reservoir; The Chinese patent application of application number 201010134590.9 discloses a kind of temporary plugging agent for staged fracturing of horizontal well and preparation method thereof; The Chinese patent application of application number 201010599287.6 discloses a kind of temporary plugging diversion agent for refracturing of oil-water well and preparation method thereof; The Chinese patent application of application number 201110033337.9 discloses a kind of high temperature mixed phase and has blocked temporarily and alter agent and preparation method thereof; The Chinese patent application of application number 201110095943.3 discloses efficient stifled the de-connecting of a kind of oil field late high water content period oil reservoir continuously steady production and has made new method; The Chinese patent application of application number 201110256819.0 discloses a kind of drilling leakage blockage high molecular polymer absorbent material; The Chinese patent application of application number 201110330609.1 discloses a kind of acid fracturing diverting agent; The Chinese patent application of application number 201210028177.3 discloses a kind of leakage oil well microballoon diverting agent.
Oil well diverting agent used in above-mentioned prior art is especially in the heavy oil wells steam soak diverting agent in latter stage, and its ubiquity consumption is large, effect is single, high in cost of production problem.
So need badly, existing heavy oil wells steam soak temporary blocking method in latter stage is improved.
Utility model content
Main purpose of the present utility model is to provide a kind of thickened oil steam-stimulated well down-hole feed appliance of stifled energization processing use temporarily, block up temporarily material with the accurate solid that positioningly thickened oil steam-stimulated well is blocked up temporarily to energization processing use and send into down-hole desired location, implement the temporary energization processing of blocking up.
For reaching above-mentioned purpose, the utility model provides a kind of thickened oil steam-stimulated well down-hole feed appliance of stifled energization processing use temporarily, this down-hole feed appliance comprises a body, it in body, is the accommodating solid space of stifled material temporarily, body upper end is provided with box box cupling, body lower end arranges pin thread, and body inside is welded one in order to bear the solid spacing steel ring of stifled material weight temporarily in the position that approaches pin thread.
According to specific embodiments of the present utility model, described body is 4 cun of oil pipes of standard of length 1～3m.
According to specific embodiments of the present utility model, described spacing steel ring external diameter is identical with down-hole feed appliance internal diameter of tube body, and spacing steel ring height is 5～15mm, thickness 2～3mm.
According to specific embodiments of the present utility model, in the feed appliance body of described down-hole, also comprise a limiting gasket, this limiting gasket external diameter is identical with down-hole feed appliance internal diameter of tube body, is placed in spacing steel ring and solid temporarily between stifled material.
According to specific embodiments of the present utility model, described limiting gasket is the packing ring of being made up of nylon 66 or the packing ring of being made up of nylon 1010.
According to specific embodiments of the present utility model, described limiting gasket height is 100～200mm, in the middle of limiting gasket, offers the truncated cone-shaped through hole longitudinally running through, bore 50～80mm, lower bore 30～50mm on truncated cone-shaped through hole.
According to specific embodiments of the present utility model, the upper limb of the truncated cone-shaped through hole of described limiting gasket preferably arranges circular chamfering.
According to specific embodiments of the present utility model, in the truncated cone-shaped through hole in the middle of described limiting gasket, be filled with curing calcium carbonate lump, and in the middle of calcium carbonate lump, to be provided with 5～10 diameters be the longitudinal through hole of 5～10mm.
The thickened oil steam-stimulated well of the present utility model down-hole feed appliance that stifled energization is processed use is temporarily to be mainly a kind of thickened oil steam-stimulated well stifled energization processing method specialized designs temporarily, and this thickened oil steam-stimulated well temporarily stifled energization processing method comprises:
By a kind of mixed with carbonic hydroammonium by resin beads after through solid compressing and that make temporarily stifled material send into, 1～2 meter of oil reservoir bottom;
By just clamp-oning the mud acid being made into by 7～12% hydrochloric acid and 3～6% hydrofluoric acid in instlated tubular, solid temporarily stifled material disintegrates and disperses gradually under sour effect, and resin beads is along with acid solution enters stratum, shutoff high permeability zone; Acid solution turns to and enters less permeable layer, carries out selective acidizing, and carbonic hydroammonium generates gas energization is carried out in stratum under sour effect;
Complete and squeeze after acid construction, termination of pumping 0.5～1 hour;
Turn on pump is clamp-oned displacement fluid or other energization chemical assistant, control clamp-on speed 20～50 sides/hour; The raw material composition of preferred described chemical assistant comprises (taking the gross weight of this chemical assistant as benchmark): perfluorinated nonene oxygen base benzene sulfonic acid sodium salt 0.2～0.8%, alcohol 2～8%, and silicones polyethers emulsion 0.2～0.8%, ammonium carbonate 15-20%, surplus is water;
Complete after clamp-oning the construction of displacement fluid or energization chemical assistant and directly carry out steam injection construction.
Except indicating especially, described percentage number and proportion is all based on weighing scale herein.
In said method, after steam injection construction, resin beads can be decomposed under HTHP, oil reservoir is not produced to have injured temporarily and blocks up.A part in energization chemical assistant used can resolve into gas and realize energization under residual acid, high temperature, does not decompose part and can play the effect of the displacement of reservoir oil, viscosity reduction, the row of helping, and can improve steam injection efficiency.
Particularly, described solid temporarily stifled material be by the nylon 1010 resin beads of diameter 5～6mm and moistening carbonic hydroammonium (moistening moisture 5%～6% left and right of carbonic hydroammonium conventionally) by volume 1～1.2:1 mix after through compressing and make, it is the cylindrical shape with longitudinal through hole.Preferably, described solid blocks up temporarily the cylindrical peripheral diameter of material and thickened oil steam-stimulated well oil pipe and matches, and its through hole is arranged on cylinder axial centre, through hole diameter 5～10mm.More preferably, described cylindrical peripheral diameter 50～150mm, its length 50～150mm.In addition, for ease of transport and preservation, can, at described solid polyvinyl chloride or the polyethylene plastic film of external surface parcel a layer thickness 0.1～0.5mm of stifled material temporarily, while specifically using this solid to block up material temporarily, plastic foil be scratched or be torn.
Down-hole of the present utility model feed appliance, in the time of concrete application, can be that solid material described in one or more is packed in the feed appliance of down-hole, sends into underground need and blocks up temporarily at stifled position temporarily.The preferred solid temporarily amount of sending into of stifled material is the solid stifled material (length described here refers to the solid stifled cylindrical axial length of material temporarily) temporarily of 0.3～1 meter of length of oil reservoir cooperation of every 1 meter of thickness.
Above-mentioned solid blocks up material (being called for short " sprue temporarily " or " material block ") temporarily by being mainly made up of two parts: resin beads and carbonic hydroammonium.Resin beads material is preferably nylon 1010 (outward appearance: pure white or micro-yellow translucent particle, relative density: 1.03～1.05, fusing point (DEG C): 200～210, moisture content (%) :≤1.5, relative viscosity: 1.9～2.3, hot strength (MPa): >=42, static bending intensity (MPa): >=78, notched Izod impact strength (KJ/m2): >=20, volume resistance (Ω .cm): 1014～1015, sheet resistance (Ω): 1014～1015, Martin heat resistance (DEG C): 42, heat distortion temperature (1.81MPa, DEG C): 45, molding shrinkage (%): 1.2～2.2).The solid temporarily carbonic hydroammonium in stifled material dissolves and generates gas under the effect of acid solution, thereby the stifled material disintegration temporarily of block solid discharges resin beads, and resin beads is along with acid solution enters stratum, shutoff high permeability zone, and acid solution turns to and realizes selective acidizing; When follow-up steam injection construction, resin beads can be decomposed under the high temperature and high pressure environment of steam injection, does not pollute stratum, realizes stifled temporarily.The solid temporarily effect of the longitudinal through hole of stifled material is mainly to allow acid solution pass through, and dissolves gradually the solid carbonic hydroammonium in stifled material temporarily, make block solid temporarily stifled material disintegrate and discharge resin beads.
Carbonic hydroammonium course of reaction under acid effect and heat effect is mainly:
NH
4HCO
3+HCl=====NH
4Cl+H
2O+CO
2↑；
NH
4hCO
3==heating==NH
3↑+H
2o+CO
2↑.
The beneficial effects of the utility model:
In the feed appliance of down-hole of the present utility model, described spacing steel ring is mainly to accept the solid weight of stifled material temporarily of loading on it, when solid allows acid solution and resin beads to pass through when stifled material disintegrates temporarily.Described limiting gasket also can be used for placing solid load-bearing when stifled material temporarily, and solid temporarily stifled material disintegrate after to resin beads play water conservancy diversion and metering function, and in the time of steam injection, melt and do not affect the circulation of steam.The circular chamfering of limiting gasket truncated cone-shaped through hole upper limb can be beneficial to water conservancy diversion resin beads better.Limiting gasket after steam injection hot melt to stratum without injury.
Apply down-hole of the present utility model feed appliance, can accurately positioningly solid be blocked up to material temporarily and send into down-hole desired location, the temporarily stifled energization processing of enforcement, with strong points, simply, multiple-effect is unified, with low cost in construction, can bring the effect of remarkable energization.
Brief description of the drawings
Fig. 1 is the thickened oil steam-stimulated well structural representation of the down-hole feed appliance of stifled energization processing use temporarily of the utility model one specific embodiment.
Fig. 2 is that the thickened oil steam-stimulated well of the utility model one specific embodiment blocks up the solid used cross-sectional view of stifled material temporarily in energization processing method temporarily.
Fig. 3 is the cross-sectional view of the limiting gasket (not filling solid carbonic acid calcium) of the hot melt material in the down-hole feed appliance of the utility model one specific embodiment.
Fig. 4 is the plan structure schematic diagram of the limiting gasket of the hot melt material in the down-hole feed appliance of the utility model one specific embodiment.
Fig. 5 is the cross-sectional view of the hot melt material limiting gasket that is filled with solid carbonic acid calcium in the down-hole feed appliance of the utility model one specific embodiment.
Number in the figure explanation:
10 solids are stifled material 20 bodys temporarily
30 limiting gasket 201 box box cuplings
The spacing steel ring of 202 pin thread 203
101 solids are the body 102 solids through hole of stifled material temporarily of stifled material temporarily
103 plastic foil 1011 resin beads
1012 carbonic hydroammonium material 301 limiting gasket bodies
3011 limiting gasket body through hole A chamferings
302 calcium carbonate lump 3021 calcium carbonate lump through holes
Detailed description of the invention
For making the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with embodiment and accompanying drawing, embodiment of the present utility model is described in further detail.
Embodiment 1
First, shown in Figure 1, for the utility model provide a kind of for delivery of the solid down-hole feed appliance of stifled material 10 temporarily.This down-hole feed appliance mainly comprises in a body 20(the present embodiment being 4 cun of oil pipes of standard, length 1～3m), it in body, is the accommodating described solid space of stifled material 10 temporarily, body upper end is provided with box box cupling 201, body lower end arranges pin thread 202, body inside is welded a spacing steel ring 203 in order to load-bearing in the position that approaches pin thread 202, spacing steel ring height (longitudinal in figure) is about 10mm, thickness 2～3mm.
Solid in the present embodiment is stifled material 10 temporarily, its structure is shown in Figure 2, the body (solid is the body 101 of stifled material temporarily) that it mainly comprises by the stacking profile forming of multiple resin beads 1011 is cylindrical shape, the solid temporarily axial centre of the body 101 of stifled material is provided with through hole (solid is the through hole 102 of stifled material temporarily).
In the present embodiment, the solid temporarily peripheral diameter of stifled material can be slightly less than 4 cun of pipe apertures of standard, and the single solid temporarily length of stifled material not can be 50～150mm not etc.Solid temporarily through hole 102 diameters of stifled material is about 10mm.Described resin beads 1011 is that material is the resin beads of nylon 1010, diameter 5～6mm; Its outward appearance: pure white or micro-yellow translucent particle, relative density: 1.03～1.05, fusing point (DEG C): 200～210, moisture content (%) :≤1.5, relative viscosity: 1.9～2.3, hot strength (MPa): >=42, static bending intensity (MPa): >=78, notched Izod impact strength (KJ/m2): >=20, volume resistance (Ω .cm): 1014～1015, sheet resistance (Ω): 1014～1015, Martin heat resistance (DEG C): 42, heat distortion temperature (1.81MPa, DEG C): 45, molding shrinkage (%): 1.2～2.2.
In the present embodiment, the solid temporarily interior multiple resin beads 1011 of body 101 of stifled material is stacked between adjacent resin beads and forms stacking space, is filled with carbonic hydroammonium material 1012 in this space.
The solid with said structure of the present embodiment temporarily stifled material can prepare in accordance with the following methods:
After 1.2:1 mixes by volume with moistening carbonic hydroammonium by resin beads, inject mould, repressed moulding, makes with the longitudinal solid material of the cylindrical shape of through hole, is the solid stifled material temporarily of the present embodiment.Described moistening carbonic hydroammonium is moisture 5%～6% left and right conventionally, and in compressing process, moisture can be dried and evaporate.
In the present embodiment, for ease of transport with preserve described solid stifled material temporarily, this solid temporarily the external surface of stifled material be also enclosed with polyvinyl chloride or the polyethylene plastic film 103 of a layer thickness 0.1～0.5mm.When concrete this solid of use blocks up material temporarily, plastic foil is torn.
Shown in Figure 1 again, in described down-hole feed appliance body in the present embodiment, also comprise a hot melt material limiting gasket 30, these limiting gasket 30 external diameters are identical with down-hole feed appliance internal diameter of tube body 20, be placed on spacing steel ring 203, can be used for placing solid load-bearing when stifled material 10 temporarily (, hot melt material limiting gasket 30 is blocked up between material 10 temporarily at spacing steel ring 203 and solid).
In the present embodiment, described limiting gasket 30 is that material is the packing ring of nylon 66 or nylon 1010, and it is highly about 100mm.Incorporated by reference to referring to shown in Fig. 3, Fig. 4, the limiting gasket 30 of the present embodiment comprises the limiting gasket body 301 of hot melt material, offers the limiting gasket body through hole 3011 of the truncated cone-shaped longitudinally running through in the middle of limiting gasket body 301.In the present embodiment, on limiting gasket body through hole 3011, bore is about 80mm, lower bore is about 40mm.Also be provided with circular chamfering A at limiting gasket body through hole upper limb, so that water conservancy diversion resin beads better.
Shown in Figure 5, in the present embodiment, in limiting gasket body through hole 3011 in the middle of hot melt material limiting gasket 30, be also filled with curing calcium carbonate lump 302, and calcium carbonate lump 302 central longitudinal are to being provided with the calcium carbonate lump through hole 3021 that 5～10 (only showing two in figure) diameters are 5～10mm.
In the present embodiment, apply above-mentioned down-hole feed appliance the solid of the present embodiment is carried out to thickened oil steam-stimulated well stifled energization processing temporarily in stifled material oil reservoir bottom temporarily.
Processing thickened oil steam-stimulated well is 45 certain wells of brocade, producing well section 1004.4-1023.3m, and 13.6 meters 2 layers, steam injection 11 is taken turns, oil density 0.9526g/cm
3, viscosity 2885mPa.s.Because of many rounds steam injection, occur not drive a well after steam injection, stratum energy is low, determines to adopt temporarily stifled acidifying energization method to increase production.
By diameter 100mm, be about 100mm solid temporarily stifled 80 of materials pack in above-mentioned feed appliance.Feed appliance length is inadequate, and top can connect 4 cun of oil pipes and supplement filling.
After heat-insulating and sealing head bottom connects two 4 cun of oil pipes, pick again glassware, with instlated tubular down to 1025 meters of (, 1～2 meter of oil reservoir bottom).
By just clamp-oning mud acid 15 sides that are made into by approximately 10% hydrochloric acid and approximately 5% hydrofluoric acid in instlated tubular, start control clamp-on speed 5 sides/hour, if pressure 20MPa, after 20 minutes, pressure starts to decline gradually, now accelerates speed of application, pressure is bottom out again, when pressure reaches 50MPa, confirm that diverting agent plays a role, continue construction, termination of pumping pressure 30MPa, termination of pumping 0.5 hour.Now, with 18 DEG C of clear water preparation energization chemical assistant 30 sides, percentage by weight composition is as follows: perfluorinated nonene oxygen base benzene sulfonic acid sodium salt 0.5%, alcohol 5%, and silicones polyethers emulsion 0.5%, ammonium carbonate 17%, surplus is water.
Turn on pump continues to clamp-on energization chemical assistant, oil reservoir 10 sides that the consumption of chemical assistant is every meter of thickness, clamp-on speed 30 sides/hour, operation pressure 35MPa.
After completing construction, carry out steam injection construction.
When steam injection, initial stage steam injection pressure slightly raises, and then declines and is stabilized in 7.2MPa, is going up cycle decline 0.8MPa, has illustrated that new layer is employed.This steam injection 2000 sides are identical with a upper cycle.
Opening well and making production after steam injection, daily output 18.2 side's liquid, 3.5 tons of oil.This aboveground cycle does not go out while just having driven a well, stewing well fluid after 16 days, daily output 9.7 side's liquid, 0.2 ton of oil.By contrast, the method has obtained good oil increasing effect.
Claims (8)
1. the thickened oil steam-stimulated well down-hole feed appliance of stifled energization processing use temporarily, it is characterized in that, this down-hole feed appliance comprises a body, it in body, is the accommodating solid space of stifled material temporarily, body upper end is provided with box box cupling, body lower end arranges pin thread, and body inside is welded one in order to bear the solid spacing steel ring of stifled material weight temporarily in the position that approaches pin thread.
2. the thickened oil steam-stimulated well according to claim 1 down-hole feed appliance of stifled energization processing use temporarily, is characterized in that, described body is 4 cun of oil pipes of standard of length 1～3m.
3. the thickened oil steam-stimulated well according to claim 1 down-hole feed appliance of stifled energization processing use temporarily, is characterized in that, described spacing steel ring external diameter is identical with down-hole feed appliance internal diameter of tube body, and spacing steel ring height is 5～15mm, thickness 2～3mm.
4. the thickened oil steam-stimulated well according to claim 1 down-hole feed appliance of stifled energization processing use temporarily, it is characterized in that, in the feed appliance body of described down-hole, also comprise a limiting gasket, this limiting gasket external diameter is identical with down-hole feed appliance internal diameter of tube body, is placed in spacing steel ring and solid temporarily between stifled material.
5. the thickened oil steam-stimulated well according to claim 4 down-hole feed appliance of stifled energization processing use temporarily, is characterized in that, described limiting gasket is the packing ring of being made up of nylon 66 or the packing ring of being made up of nylon 1010.
6. according to the down-hole feed appliance of stifled energization processing use temporarily of the thickened oil steam-stimulated well described in claim 4 or 5, it is characterized in that, described limiting gasket height is 100～200mm, in the middle of limiting gasket, offer the truncated cone-shaped through hole longitudinally running through, bore 50～80mm, lower bore 30～50mm on truncated cone-shaped through hole.
7. the thickened oil steam-stimulated well according to claim 6 down-hole feed appliance of stifled energization processing use temporarily, is characterized in that, the upper limb of the truncated cone-shaped through hole of limiting gasket arranges circular chamfering.
8. the thickened oil steam-stimulated well according to claim 6 down-hole feed appliance of stifled energization processing use temporarily, it is characterized in that, in truncated cone-shaped through hole in the middle of limiting gasket, be filled with curing calcium carbonate lump, and in the middle of calcium carbonate lump, to be provided with 5～10 diameters be the longitudinal through hole of 5～10mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320652589.4U CN203626665U (en) | 2013-10-22 | 2013-10-22 | Downhole feeder for temporary blocking and energization processing of heavy oil steam huff and puff well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320652589.4U CN203626665U (en) | 2013-10-22 | 2013-10-22 | Downhole feeder for temporary blocking and energization processing of heavy oil steam huff and puff well |
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| Publication Number | Publication Date |
|---|---|
| CN203626665U true CN203626665U (en) | 2014-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320652589.4U Expired - Fee Related CN203626665U (en) | 2013-10-22 | 2013-10-22 | Downhole feeder for temporary blocking and energization processing of heavy oil steam huff and puff well |
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| CN (1) | CN203626665U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110374547A (en) * | 2019-06-12 | 2019-10-25 | 中国石油化工股份有限公司 | A kind of ball injector and the Thickened oil injection-production integrated pipe column using the ball injector |
-
2013
- 2013-10-22 CN CN201320652589.4U patent/CN203626665U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110374547A (en) * | 2019-06-12 | 2019-10-25 | 中国石油化工股份有限公司 | A kind of ball injector and the Thickened oil injection-production integrated pipe column using the ball injector |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140604 Termination date: 20211022 |