CN102094617A - Pitch-variable spiral gas anchor - Google Patents
Pitch-variable spiral gas anchor Download PDFInfo
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- CN102094617A CN102094617A CN2011100201365A CN201110020136A CN102094617A CN 102094617 A CN102094617 A CN 102094617A CN 2011100201365 A CN2011100201365 A CN 2011100201365A CN 201110020136 A CN201110020136 A CN 201110020136A CN 102094617 A CN102094617 A CN 102094617A
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Abstract
The invention discloses a pitch-variable spiral gas anchor, belongs to the technical field of mechanical petroleum mining, and in particular relates to an underground oil-gas separation device. The pitch-variable spiral gas anchor comprises an upper joint, a shunt valve body, a shell, a screw and a lower joint, wherein the lower thread of the upper joint is in threaded connection with the upper thread of the shunt valve body; the lower thread of the shunt valve body is in threaded connection with the upper thread of the shell; the lower thread of the shell is in threaded connection with an external thread on the lower joint; the screw is axially arranged in the shell; spiral sheets are arranged at the periphery of the screw; the lower end of the screw is fixedly connected with the lower joint; and the pitch of the spiral sheets on the screw is gradually reduced from bottom to top. The pitch-variable spiral gas anchor has high oil-gas separation efficiency, can adapt to oil wells with different liquid yields and gas-oil ratios, has long service life and is convenient to install.
Description
Technical field
The invention belongs to petroleum machinery production technique field, be specifically related to a kind of downhole oil air separation.
Background technology
For the high oil well of gas-oil ratio, gas is to the oil well production obvious effect when adopting sucker rod pump to produce, and mainly show: pump barrel is not fully filled liquid, and pump efficiency is low, influences oil well output; Under the serious situation, gas repeated compression and expansion cause standing valve and travelling valve to open in the pump barrel, form gas lock, and oil well is not fuel-displaced.In order to address this problem, the oil field often adopts gas anchor (downhole oil air separation) to carry out Oil-gas Separation, enters the oil jacket annular space after most of gas is separated, reduces the tolerance that enters deep well pump as far as possible.So gas anchor divides the height of gas efficient to be directly connected to the height of the pump efficiency of oil well pump.
At present oil field gas anchor commonly used divides two kinds of decanter type gas anchor and spiral gas anchors substantially.
The decanter type gas anchor mainly is to utilize the principle of slippage effect to carry out Oil-gas Separation, and structure is relatively simple, and oil well output is low more, flow stream velocity is slow more, and oil gas separation is good more, is applicable to that gas-oil ratio is not high, and the production fluid amount is lower than the oil well of 10t/d.
Spiral gas anchor is to use more a kind of gas anchor at present, mainly be to utilize the principle of centrifugal effect to carry out Oil-gas Separation, contain gas and oil stream rotational flow in gas anchor, utilize the fluid force mental and physical efforts difference of different densities, make the air pocket of being assembled prolong the spiral flows inside, the liquid that has not separated minute bubbles is then along flows outside.The air pocket of being assembled is constantly assembled, rise to screw top along the inboard and be gathered into cap, be discharged to oil sets annular space through steam vent, during down stroke, pump stops oil suction, the minute bubbles slippage come-up that contains in the liquid in oil sets annular space and the gas anchor, and a part rises to oil sets annular space, float to gas cap on the part, enter oil sets annular space, liquid stream advances pump along the outside through the flow liquid road.The branch gas efficient of spiral gas anchor is than common decanter type gas anchor height, and the production fluid amount is higher, and gas-oil ratio is bigger, and big more minute gas efficient of bubble diameter is high more.Oil wells in field is used and is found that the subject matter that exists is as follows:
1, the pitch of conventional spiral gas anchor is identical, and its numerical value is also certain.Pitch is too for a short time to help gas-liquid separation, and pitch is too big, increases liquid flowing resistance, and the production fluid amount of oil well be constantly change and also each well yield also different, not necessarily best to other oil well according to the gas anchor of a certain gas-oil ratio and output design.
2, conventional spiral gas anchor is a single coil configuration, and helix length is shorter, improve oil gas separation, must increase helix length, and along with the increase of helix length, the up resistance of fluid increases, and reduces flow stream velocity relatively, and influence to a certain extent divides the gas effect.
3, an outlet valve is arranged at the gas cap top of conventional spiral gas anchor, and when the pressure in the gas cap during greater than the pressure more than the outlet valve, outlet valve is opened, and the gas after the separation enters oil sets annular space through steam vent.If when the pressure in the gas cap was big inadequately, in the time of can not overcoming the weight of outlet valve, outlet valve was not opened, whole gas anchor just loses effect, because sand scale is many or the thicker well of oil ratio, outlet valve also lost efficacy easily in addition.
Summary of the invention
The objective of the invention is: increase the compliance of gas anchor, improve down-hole oil gas separative efficiency, the situation of avoiding outlet valve not open, cause gas anchor to lose efficacy simultaneously the oil well of different gas-oil ratios, different production fluid amounts.
The object of the present invention is achieved like this: the variable-pitch auger gas anchor, comprise top connection, shunting valve body, and shell, screw rod and lower contact, screw thread is threaded with screw thread on the shunting valve body under the top connection; Screw thread is threaded with screw thread on the shell under the shunting valve body; Screw thread is threaded with external screw thread in the lower contact under the shell, and screw rod axially is set in the shell, and the screw rod periphery is provided with flight, the fixedly connected lower contact in screw rod lower end, and the pitch of flight diminishes from lower to upper gradually on the described screw rod.
In order to increase oil gas separation, described flight is at least bispin.
In order to make the reliability that increases exhaust, the fixedly connected bullet in described screw rod upper end, steam vent is offered in the upper end of described bullet, and described bullet cooperates the formation annular gap with the following centre bore of described shunting valve body.
In order to reach higher separative efficiency, described screw rod inner hollow, and the uniform radial direction through hole of the sidewall of screw rod.
When the present invention works, the variable-pitch auger gas anchor is connected the bottom of oil well pump by its top connection.The mixed liquor that the oil well pump upstroke sinks enters from the center-aisle of lower contact, and is up via the helical duct that shell, screw rod constitute; Because action of centrifugal force, water, the fluid that wet goods density is bigger are thrown to the helical duct outside and are moved upward, gas is gathered around screw shaft, the part minute bubbles are discharged by steam vent through the center-aisle that the eyelet on the screw rod enters in the screw rod, and the part air pocket moves upward along the helical duct inboard; Because the pitch of flight diminishes from lower to upper gradually, the swirl velocity of fluid is accelerated gradually, improved the separative efficiency of gas, failing eyelet from the screw rod enters the gas of high speed rotation of the center-aisle in the screw rod along the helical duct inboard, converge with the gas of discharging through the annular gap, enter in the oil jacket annular space by steam vent from screw rod internal channel steam vent; This moment, water, the wet goods heavy substance of rotation were advanced into oil well pump on outage continues at a high speed.
The present invention adopts the varying pitch structure, and pitch accelerates the swirl velocity of fluid from big to small from bottom to up gradually, improves and divides gas efficient; Increase the compliance of gas anchor simultaneously to different gas-oil ratios, different production fluid amounts; Adopt many helical structures, compare with the single coil configuration of identical pitch, same-handed length, many spirals gas anchor can improve the swirl velocity of fluid, and Oil-gas Separation is thorough; The burbling angle increases simultaneously, and liquid flowing resistance is little, can effectively improve Oil-gas Separation efficient; Adopt the open type steam vent, the phenomenon of having avoided the big inadequately outlet valve of pressure in the gas cap not open has also reduced the situation that sand scale is more or oil ratio is thicker well array air valve lost efficacy.
Description of drawings
Fig. 1 is a kind of structural representation of the present invention.
Wherein, 1-top connection, 2-shunting valve body, 3-shell, 4-screw rod, 5-lower contact, 6-flight, 7-bullet, 8-steam vent, 9-annular gap, 10-radial direction through hole.
The specific embodiment
As shown in Figure 1, the variable-pitch auger gas anchor comprises top connection 1, shunting valve body 2, shell 3, screw rod 4 and lower contact 5, and 1 time screw thread of top connection is threaded with screw thread on the shunting valve body 2; 2 times screw threads of shunting valve body are threaded with screw thread on the shell 3; 3 times screw threads of shell are threaded with external screw thread in the lower contact 5, and screw rod 4 axially is set in the shell 3, and screw rod 4 peripheries are provided with flight 6, the fixedly connected lower contact 5 in screw rod 4 lower ends, and the pitch of flight 6 diminishes from lower to upper gradually; And flight 6 is the double helix sheet.The fixedly connected bullet 7 in screw rod 4 upper ends, steam vent 8 is offered in the upper end of bullet 7, and bullet 7 cooperates formation annular gap 9 with the following centre bore of shunting valve body 2; Screw rod 4 inner hollow, and the uniform radial direction through hole 10 of the sidewall of screw rod 4; Upper end of the present invention can be installed in the lower end of oil well pump, and its lower end connects oil pipe, screen casing etc. and gets final product.
Claims (4)
1. the variable-pitch auger gas anchor comprises top connection, shunting valve body, shell, screw rod and lower contact, and screw thread is threaded with screw thread on the shunting valve body under the top connection; Screw thread is threaded with screw thread on the shell under the shunting valve body; Screw thread is threaded with external screw thread in the lower contact under the shell, and screw rod axially is set in the shell, and the screw rod periphery is provided with flight, and the fixedly connected lower contact in screw rod lower end is characterized in that: the pitch of flight diminishes from lower to upper gradually on the described screw rod.
2. variable-pitch auger gas anchor according to claim 1 is characterized in that: described flight is at least bispin.
3. variable-pitch auger gas anchor according to claim 1 is characterized in that: the fixedly connected bullet in described screw rod upper end, steam vent is offered in the upper end of described bullet, and described bullet cooperates the formation annular gap with the following centre bore of described shunting valve body.
4. variable-pitch auger gas anchor according to claim 1 is characterized in that: described screw rod inner hollow, and the uniform radial direction through hole of the sidewall of screw rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110020136 CN102094617B (en) | 2011-01-18 | 2011-01-18 | Pitch-variable spiral gas anchor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110020136 CN102094617B (en) | 2011-01-18 | 2011-01-18 | Pitch-variable spiral gas anchor |
Publications (2)
| Publication Number | Publication Date |
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| CN102094617A true CN102094617A (en) | 2011-06-15 |
| CN102094617B CN102094617B (en) | 2013-10-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201110020136 Active CN102094617B (en) | 2011-01-18 | 2011-01-18 | Pitch-variable spiral gas anchor |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106761658A (en) * | 2016-12-13 | 2017-05-31 | 国家深海基地管理中心 | Improved high-efficiency gas anchor |
| CN107905780A (en) * | 2017-12-21 | 2018-04-13 | 辽宁瑞邦石油技术发展有限公司 | A kind of Weighing type oil well meter of gas-liquid multiphase measurement |
| CN108222913A (en) * | 2016-12-21 | 2018-06-29 | 中国石油天然气股份有限公司 | A kind of sand setting gas anchor |
| CN111299741A (en) * | 2020-03-24 | 2020-06-19 | 大连理工大学 | Device and method for removing bubbles in vacuum brazing filler metal |
| CN112709553A (en) * | 2020-12-25 | 2021-04-27 | 中国石油大学(北京) | Toe end screen pipe of horizontal well |
| CN114718545A (en) * | 2021-01-04 | 2022-07-08 | 中国石油天然气股份有限公司 | Gas-liquid separator |
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| SU819312A1 (en) * | 1978-10-19 | 1981-04-07 | Предприятие П/Я Г-4938 | Gas-liquid separator |
| CN2101753U (en) * | 1991-08-24 | 1992-04-15 | 鞍山钢铁公司 | Multifunctional boring rod stabilizing device |
| US6036749A (en) * | 1997-08-26 | 2000-03-14 | Petroleo Brasileiro S.A. - Petrobras | Helical separator |
| CN2881091Y (en) * | 2006-01-13 | 2007-03-21 | 中国石化胜利油田有限公司采油工艺研究院 | Under well gas liquid cyclone |
| CN200996291Y (en) * | 2006-09-27 | 2007-12-26 | 苗在朝 | Oil-vapour separater under well |
| CN201013345Y (en) * | 2007-01-08 | 2008-01-30 | 姚向青 | Novel down-hole three-phase separator |
| EP2233547A1 (en) * | 2009-03-24 | 2010-09-29 | Paolo Rebai | Method and chemical reactor for producing gaseous hydrocarbons derived from plastic materials |
| CN201627575U (en) * | 2010-04-01 | 2010-11-10 | 丁建军 | Oil well air-lock-preventing oil pumping pipe column |
-
2011
- 2011-01-18 CN CN 201110020136 patent/CN102094617B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU819312A1 (en) * | 1978-10-19 | 1981-04-07 | Предприятие П/Я Г-4938 | Gas-liquid separator |
| CN2101753U (en) * | 1991-08-24 | 1992-04-15 | 鞍山钢铁公司 | Multifunctional boring rod stabilizing device |
| US6036749A (en) * | 1997-08-26 | 2000-03-14 | Petroleo Brasileiro S.A. - Petrobras | Helical separator |
| CN2881091Y (en) * | 2006-01-13 | 2007-03-21 | 中国石化胜利油田有限公司采油工艺研究院 | Under well gas liquid cyclone |
| CN200996291Y (en) * | 2006-09-27 | 2007-12-26 | 苗在朝 | Oil-vapour separater under well |
| CN201013345Y (en) * | 2007-01-08 | 2008-01-30 | 姚向青 | Novel down-hole three-phase separator |
| EP2233547A1 (en) * | 2009-03-24 | 2010-09-29 | Paolo Rebai | Method and chemical reactor for producing gaseous hydrocarbons derived from plastic materials |
| CN201627575U (en) * | 2010-04-01 | 2010-11-10 | 丁建军 | Oil well air-lock-preventing oil pumping pipe column |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106761658A (en) * | 2016-12-13 | 2017-05-31 | 国家深海基地管理中心 | Improved high-efficiency gas anchor |
| CN106761658B (en) * | 2016-12-13 | 2023-09-29 | 神木富塬盛矿山支护材料有限公司 | Improved efficient gas anchor |
| CN108222913A (en) * | 2016-12-21 | 2018-06-29 | 中国石油天然气股份有限公司 | A kind of sand setting gas anchor |
| CN108222913B (en) * | 2016-12-21 | 2020-05-08 | 中国石油天然气股份有限公司 | Sand setting gas anchor |
| CN107905780A (en) * | 2017-12-21 | 2018-04-13 | 辽宁瑞邦石油技术发展有限公司 | A kind of Weighing type oil well meter of gas-liquid multiphase measurement |
| CN111299741A (en) * | 2020-03-24 | 2020-06-19 | 大连理工大学 | Device and method for removing bubbles in vacuum brazing filler metal |
| CN112709553A (en) * | 2020-12-25 | 2021-04-27 | 中国石油大学(北京) | Toe end screen pipe of horizontal well |
| CN112709553B (en) * | 2020-12-25 | 2021-10-26 | 中国石油大学(北京) | Toe end screen pipe of horizontal well |
| CN114718545A (en) * | 2021-01-04 | 2022-07-08 | 中国石油天然气股份有限公司 | Gas-liquid separator |
| CN114718545B (en) * | 2021-01-04 | 2023-06-30 | 中国石油天然气股份有限公司 | Gas-liquid separation device |
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|---|---|
| CN102094617B (en) | 2013-10-23 |
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