CN102102507B - Double-cavity sand and gas anchor - Google Patents
Double-cavity sand and gas anchor Download PDFInfo
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- CN102102507B CN102102507B CN200910265916.9A CN200910265916A CN102102507B CN 102102507 B CN102102507 B CN 102102507B CN 200910265916 A CN200910265916 A CN 200910265916A CN 102102507 B CN102102507 B CN 102102507B
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- gas anchor
- cavity
- gas
- sand
- double
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Abstract
The invention relates to a double-cavity sand and gas anchor which is used for gas, liquid and sand separation under an oilfield well. The double-cavity sand and gas anchor is provided with a gas anchor outer sleeve through which a central pipe passes; the upper end of the central pipe is provided with an oil pump joint which is coupled with an oil well pump; a plurality of tail holes are formed on the lower part of the central pipe; a plurality of oil inlet holes are symmetrically formed on a pipe wall of the middle and top part of the gas anchor outer sleeve; an air bubble distribution piece on which a plurality of vertical through holes are formed is arranged at the upper end of the oil inlet holes and between the gas anchor outer sleeve and the central pipe; a fixed screw in which a screw channel is formed is arranged near the bottom of the central pipe and between the gas anchor outer sleeve and the central pipe; and the space between the gas anchor outer sleeve and the central pipe is sequentially divided into a gas storage cavity, a settlement cavity and a sand removal cavity from bottom to top by the air bubble distribution piece and the fixed screw. The double-cavity sand and gas anchor has the advantages of simple structure, low manufacturing cost, easiness in installation, long service life, good effect and the like, and can fulfill the aim of greatly improving the output of oil extraction.
Description
Technical field
The invention belongs to the extracting device of oil technical field of petroleum industry system, relate to a kind of for carry out the sand gas anchor of gas, liquid, sand separation at oil field well.
Background technology
The existing crude oil lifting equipment in oil field is taking plunger oil-well pump as main, this oil well pump is in the time of oily underground work, suction be the mixed liquor of gas, oil, water three-phase, and the oil well of some special geologic structure also has the impurity such as suitable sand grains and is present in the crude oil mixed liquor being sucked.In oil well pump, enter gas, can reduce the result of use of oil well pump, affected output; And in oil pump, enter after sand grains, not only accelerate the wearing and tearing of oil well pump, when serious, also can make oil well pump be stuck, cannot work.For solving the above problems, many oil wells are all to carry out the separation of gas, liquid separation or gas, liquid, sand grains with gas anchor or sand gas anchor for a long time.The operating principle of traditional all kinds of down-holes gas anchor is to allow mixed liquor enter in a large number gas anchor, make fluid in convolution is flowed, carry out gas, liquid separation by the various runners of gas anchor, but the separating effect of this method is very low, especially down-hole viscosity is greater than to the fluid of 2MPas all the more so, in on-the-spot application, is being difficult to reach the object that improves pump efficiency, increases output.Some state-of-the art gas anchor products of this area development in recent years are as many Settlement Cups flow type gas anchor etc., though separative efficiency is improved to a certain extent, but structure too complicated (as nearly 30～500 of the quantity of the corrugation Settlement Cup of the gas anchors such as many glasss), high expensive, and to oil, gas mixed liquor voluntarily the spatial volume of sedimentation all design littlely (as the corrugation Settlement Cup of the gas anchors such as many glasss, mixed crude is from automatic sedimentation to the only distance of 50～100mm of space length that live crude does not enter hole), thus effect is not ideal enough.And the desanding structure of existing sand gas anchor also adopts the method outside the pump housing with wire lath resistance sand more, result of use is also difficult fully up to expectations.
Summary of the invention
The problem that the object of the invention is to prior art to exist is solved, and a kind of simple in structure, cost of manufacture is low, result of use is good double-cavity sand gas anchor is provided.
Technical solution is for achieving the above object such: the double-cavity sand gas anchor providing has the gas anchor outer tube that is coated with central tube in, the oil pump joint connecting with oil well pump is equipped with in central tube upper end, have multiple uropores in central tube bottom, on the tube wall of the middle and upper part of gas anchor outer tube, symmetry has multiple fuel feed holes, the one bubble distribution member of having offered multiple perpendicular through holes on it is housed being positioned at fuel feed hole upper end position place between gas anchor outer tube and central tube, the fixing screw of warding off helical duct in one is equipped with in the position that approaches central tube bottom between two pipes, said bubble distribution member and fixing screw by the space between gas anchor outer tube and central tube from bottom to top successively every being divided into gas storage cavity, sedimentation cavity and desanding chamber.
The further solution of the present invention is: in double-cavity sand gas anchor bubble distribution member, have the perpendicular through hole of multiple circles or the perpendicular through hole of abnormity; Be processed with inclined-plane, an inclination angle on the upper edge of fuel feed hole; On fixing screw, have the helical duct that multiple tracks is communicated with up and down, the normal cross-section of helical duct is trapezoidal, semicircle or other is abnormally-structured.In addition, in structure of the present invention, the volume of sedimentation cavity is at least 2 times of supporting oil well pump discharge capacity, in enforcement taking 2～6 times as good.
In practical application, by oil pump joint, double-cavity sand gas anchor is connected under oil well pump.When sand gas anchor is in the time that underground work is in pumping state, the suction that oil pump produces produces negative pressure by each uropore by central tube and central tube bottom in the sedimentation cavity of sand gas anchor sleeve pipe.Because sand gas anchor entirety is immersed in crude oil, so the crude oil mixed liquor that contains oil, gas, sand, water thing will enter sedimentation cavity by sand gas anchor oil-in.With regard to traditional gas anchor structure, the space length of overlength can make the bubble in crude oil intermittently have the longer time to be separated fully in oil well pump pumping with sedimentation volumn, but be greater than 2MPas and bubble in liquid when very little in crude oil liquid viscosity, but how could realize effective oil, gas separates, designer has designed bubble distribution member device in gas anchor for this reason, and then a completely new concept that adds proper amount of gas (air pocket) in sand gas anchor mixed liquor proposed, its principle is according to Stoke's law, the speed that gas rises is directly proportional to bubble diameter square, like this in the time that crude oil mixed liquor flows through sand gas anchor oil-in, due to the effect of fluid dynamic and sleeve pipe sedimentation negative pressure and cavity, gas in sand gas anchor gas storage cavity can form appropriate larger bubble by bubble distribution member and enter sleeve pipe sedimentation cavity together with crude oil mixed liquor, in the time that oil well pump finishes pumping stroke and enters backhaul, sand gas anchor sleeve pipe sedimentation cavity has also just stopped negative pressure state, can merge soon in aforesaid larger bubble and rise rapidly (being greater than in the crude oil of 2MPas effect in viscosity more remarkable) so be stained with minute bubbles in consistency crude oil mixed liquor.When larger bubble rise to sand gas anchor oil-in upper along time, because forming after larger bubble is pulled away, the portion gas in pumping stroke medium sand gas anchor gas storage cavity is also in certain negative pressure state, thereby the air pocket rising can be sucked again to sand gas anchor gas storage cavity, supplement source of the gas, until be full of.Air pocket unnecessary in rising, by by the upper edge of sand gas anchor oil-in, is discharged at the outer wall of gas anchor outer tube.
The desanding mode of double-cavity sand gas anchor of the present invention has adopted the principle of rotational flow settlement.Between sand gas anchor central tube and gas anchor outer tube, be provided with the fixing screw of warding off multi-circle spiral flow passage in one, in the time that oil well pump is in pumping stroke, the crude oil that sand gas anchor sleeve pipe sedimentation cavity bottom has been got rid of gas by the negative pressure that central tube uropore produces sucks in central tube, when these also contain oil, water, when the crude oil mixed liquor of sand passes through fixing screw at a high speed, mixed liquor can produce strong rotation, under the effect of centrifugal force, heavier sand grains and water will paste outer sleeve inner wall rotation sedimentation, and be deposited in sand gas anchor tail pipe cover always, lighter crude oil free from foreign meter enters oil well pump by central tube.
Separate and utilize rotational flow settlement principle to separate the structure of sand grains except adding air pocket to accelerate gas, the present invention has also made critical appropriate design to the volume of sleeve pipe sedimentation cavity, general according to the size of the single pass pumpage of different model oil well pump and viscosity of crude, the volume of sleeve pipe sedimentation cavity is at least 2 times of oil well pump discharge capacity, taking 2～6 times as good.In the reciprocal process of oil well pump, just can there be so sufficient time settlement crude oil and Exhaust Gas.
Compared with prior art, that double-cavity sand gas anchor of the present invention has is simple in structure, cost of manufacture is low, easy installation, long service life, the advantage such as effective, and product is extremely successful through actual tests in oil well, and oil recovery amount is improved largely.
Brief description of the drawings
Accompanying drawing is the structural representation of a specific embodiment of the present invention.
In figure, each label title is respectively: 1-oil pump joint, and 2-fuel feed hole, 3-gas anchor outer tube, 4-central tube, 5-sedimentation cavity, 6-tail pipe cover, 7-uropore, 8-fixes screw, 9-gas storage cavity, 10-bubble distribution member.
Detailed description of the invention
Below with reference to accompanying drawing, content of the present invention is described further, but actual fabrication structure of the present invention is not limited in following embodiment.
Referring to accompanying drawing, double-cavity sand gas anchor of the present invention is mainly made up of parts such as gas anchor outer tube 3, central tube 4, oil pump joint 1, tail pipe covers 6, longitudinally fixing with one heart of gas anchor outer tube 3 and central tube 4, central tube 4 upper ends connect with oil well pump by oil pump joint 1, and central tube 4 bottoms have multiple uropores 7.On the tube wall of the middle and upper part of gas anchor outer tube 3, symmetry has four fuel feed holes 2, between gas anchor outer tube 3 and central tube 4, be positioned at fuel feed hole 2 upper end position places bubble distribution member 10 is housed, in this bubble distribution member 10, have the perpendicular through hole of multiple circles or the perpendicular through hole of abnormity, be processed with inclined-plane, an inclination angle on the upper edge of fuel feed hole 2; Fixing screw 8 is equipped with in the another position that approaches central tube 4 bottoms between two pipes, and this fixing screw 8 is provided with the helical duct of the upper and lower UNICOM of multi-turn, and the normal cross-section of its helical duct is trapezoidal, semicircle or other abnormally-structured.The present invention arranges the space between gas anchor outer tube 3 and central tube 4 from bottom to top successively every being divided into gas storage cavity 9, sedimentation cavity 5 and desanding chamber by above-mentioned bubble distribution member 10 and fixing screw 8, and wherein the volume of sedimentation cavity is 2～6 times of supporting oil well pump discharge capacity.
Claims (4)
1. a double-cavity sand gas anchor, there is the gas anchor outer tube (3) that is coated with central tube (4) in, oil pump joint (1) is equipped with in central tube (4) upper end, have multiple uropores (7) in central tube (4) bottom, on the middle and upper part tube wall of gas anchor outer tube (3), symmetry has multiple fuel feed holes (2), at two pipes (3, 4) the fixing screw (8) of warding off helical duct in one is equipped with in the position that approaches central tube (4) bottom between, it is characterized in that: the one bubble distribution member (10) of having offered multiple perpendicular through holes on it is housed being positioned at fuel feed hole (2) upper end position place between gas anchor outer tube (3) and central tube (4), said bubble distribution member (10) and fixing screw (8) by the space between gas anchor outer tube (3) and central tube (4) from bottom to top successively every being divided into gas storage cavity (9), sedimentation cavity (5) and desanding chamber.
2. double-cavity sand gas anchor according to claim 1, is characterized in that having the perpendicular through hole of multiple circles or the perpendicular through hole of abnormity in bubble distribution member (10).
3. double-cavity sand gas anchor according to claim 1, the volume that it is characterized in that sedimentation cavity (5) is at least 2 times of supporting oil well pump discharge capacity.
4. according to the double-cavity sand gas anchor described in claim 1 or 3, the volume that it is characterized in that sedimentation cavity (5) is 2～6 times of supporting oil well pump discharge capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910265916.9A CN102102507B (en) | 2009-12-22 | 2009-12-22 | Double-cavity sand and gas anchor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910265916.9A CN102102507B (en) | 2009-12-22 | 2009-12-22 | Double-cavity sand and gas anchor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102102507A CN102102507A (en) | 2011-06-22 |
| CN102102507B true CN102102507B (en) | 2014-11-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910265916.9A Expired - Fee Related CN102102507B (en) | 2009-12-22 | 2009-12-22 | Double-cavity sand and gas anchor |
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| Country | Link |
|---|---|
| CN (1) | CN102102507B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107762465B (en) * | 2017-11-07 | 2020-04-10 | 中国石油天然气股份有限公司 | Gas anchor for fireflooding and operation method of gas anchor |
| RU193678U1 (en) * | 2019-09-30 | 2019-11-11 | Публичное акционерное общество "Татнефть" имени В.Д. Шашина | Gas sand anchor for plug-in sucker rod pumps |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0901844A2 (en) * | 1997-09-10 | 1999-03-17 | Steffen, Robertson & Kirsten Consulting Engineers (Proprietary) Limited | Method and device for treating an impure liquid |
| US6116338A (en) * | 1998-09-09 | 2000-09-12 | Green Country Supply, Inc. | Inducer for increasing centrifugal pump efficiency in wells producing high viscosity crude oil |
| CN2407122Y (en) * | 1999-11-12 | 2000-11-22 | 中国石化集团河南石油勘探局采油工艺研究所 | Spiral downhole oil and gas separator |
| CN200996291Y (en) * | 2006-09-27 | 2007-12-26 | 苗在朝 | Oil-vapour separater under well |
| CN201003398Y (en) * | 2006-08-08 | 2008-01-09 | 杨峰 | Spiral cover type gas sand anchor |
| US7461692B1 (en) * | 2005-12-15 | 2008-12-09 | Wood Group Esp, Inc. | Multi-stage gas separator |
-
2009
- 2009-12-22 CN CN200910265916.9A patent/CN102102507B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0901844A2 (en) * | 1997-09-10 | 1999-03-17 | Steffen, Robertson & Kirsten Consulting Engineers (Proprietary) Limited | Method and device for treating an impure liquid |
| US6116338A (en) * | 1998-09-09 | 2000-09-12 | Green Country Supply, Inc. | Inducer for increasing centrifugal pump efficiency in wells producing high viscosity crude oil |
| CN2407122Y (en) * | 1999-11-12 | 2000-11-22 | 中国石化集团河南石油勘探局采油工艺研究所 | Spiral downhole oil and gas separator |
| US7461692B1 (en) * | 2005-12-15 | 2008-12-09 | Wood Group Esp, Inc. | Multi-stage gas separator |
| CN201003398Y (en) * | 2006-08-08 | 2008-01-09 | 杨峰 | Spiral cover type gas sand anchor |
| CN200996291Y (en) * | 2006-09-27 | 2007-12-26 | 苗在朝 | Oil-vapour separater under well |
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| Publication number | Publication date |
|---|---|
| CN102102507A (en) | 2011-06-22 |
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Effective date of registration: 20160322 Address after: 710054 Shaanxi Province, Xi'an Yanta District pagoda Street office after the Village West Road No. nine building 1 unit second view mansion 6 floor room 10601 Patentee after: Xi'an Tongzheng Transmission Technology Co.,Ltd. Address before: 710001 Shaanxi province Xi'an Beilin District Six building 4 layer 1 Lane commercial door No. 5 Patentee before: Li Jianli |
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| 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: 20141105 Termination date: 20211222 |