CN2758474Y - Under well gas liquid separating and back filling sand proof gas recovering device - Google Patents
Under well gas liquid separating and back filling sand proof gas recovering device Download PDFInfo
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- CN2758474Y CN2758474Y CN 200420096603 CN200420096603U CN2758474Y CN 2758474 Y CN2758474 Y CN 2758474Y CN 200420096603 CN200420096603 CN 200420096603 CN 200420096603 U CN200420096603 U CN 200420096603U CN 2758474 Y CN2758474 Y CN 2758474Y
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- gas
- liquid
- sand control
- liquid separation
- screw pump
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Abstract
The utility model relates to an underground gas production device which utilizes the producing pressure difference of a gas well as motive power and automatically achieves gas-liquid separation and separating liquid lower stratum layer reinjection and air layer sand control. The utility model is formed from two large parts, namely a gas-liquid separation reinjection part and a sand control part, wherein the gas-liquid separation reinjection part comprises a gas turbine, a speed changer, a screw pump and a gas-liquid separator; the sand control part comprises a tubing anchor, a metal wool sand filter, a leather cup packer, a central tube, etc.; the two large parts are connected in the way of intubation sealing. The gas turbine is connected with the lower section of a tubing string, and the speed changer is arranged at the middle part of a transmission shaft; the motive power generated by the gas turbine is sent to the screw pump through the transmission shaft; a gap of an oil sleeve ring is provided with a spiral deflector, a liquid collector groove and a liquid filling hole to form the gas-liquid separator. Gas and liquid are separated underground utilizing a rotational flow effect; the gas upwards drives the turbine to rotate and is produced to the ground by an oil conduit; the liquid is collected by the liquid collector groove, sucked and squeezed by the screw pump, and enters a lower water pouring layer in the form of high pressure fluid through a center pipe.
Description
Technical field:
The utility model belongs to the improvement of natural gas extraction down-hole gas-liquid separation re-injection sand control gas producing device.
Technical background:
Raising along with the gas reservoir development degree, increasing gas well begins to produce water, aquifer yield is also more and more higher, the existence of fluid column has increased the production resistance of natural gas in the gas well, a lot of gas wells lose production capacity (being the gas well water logging) because of head of liquid is excessive, therefore how handling the formation water in the gas well effectively, has been a problem that needs to be resolved hurrily in the domestic and international gas production engineering.Existing production gas technology technology adopts more to be injected chemical blowing agent and uses the outlet capacity of taking that the little oil pipe technology improves natural gas in gas well.But bring more problem,, also brought difficulty for the gas-liquid separation on ground though at first frother can bring to ground with the formation water in the gas well pit shaft effectively.Be that gas-liquid mixed stream is adopted to ground again, not only need to build a large amount of ground gas-liquid separation equipments, and isolated formation water also must inject underground, huge surface separation equipment, divide and dried uply to converge pipeline and injection device has taken a large amount of funds after ad hoc pipeline converges.Also have formation water in processing procedure, during the gas well open flow, environment to be caused serious pollution.
Summary of the invention:
The utility model is just for solving the deficiency in the prior art means, as ground installation too much, design such as contaminated environment, provide a kind of scene to be suitable for for producing the aqueous vapor well, can realize gas-liquid separation automatically in the down-hole, divide dried up re-injection, the process unit of sand control simultaneously.The purpose of this utility model provides down-hole gas-liquid separation re-injection sand control gas producing device for the scene exactly.
The utility model is achieved like this, a kind of down-hole gas-liquid separation re-injection sand control gas producing device, partly form by gas-liquid separation re-injection part and gas-bearing formation sand control, gas-liquid separation re-injection part topmost is that gas turbine (14) is connected that (24) link to each other by power transmission shaft (15) with the screw pump (18) of bottom on the tubing string, gear (13) is equipped with at the middle part of power transmission shaft (15), be furnished with by spiral guiding plate (17) at oil jacket annular space place, and on the tubing string of screw pump (18) top, have hole (11), spirality liquid collector groove (16) is located to be equipped with in hole (11), gas-bearing formation sand control part, top is equipped with seal receptacle (20) and is connected with following tubing anchor (8), connect screen casing (7) below the tubing anchor (8), a central tube (5) is equipped with in the inside of screen casing (7), central tube (5) top is connected with tubing anchor (8) by screw thread, insert in the seal receptacle (3) bottom, the below of screen casing (7) connects cup packer (21), safety pin (22) is housed under cup packer (21) successively, centralizer (6), sand control metal wool filter screen (4), safety pin fixed (2), be bottom two back to cup packer (1).Spiral guiding plate (17) has been made angle of declination and has been fixed on the oil pipe (24).Liquid collector groove (17) is made by rubber, and upper surface has imbrication shape groove line, and outer rim is close to internal surface of sleeve pipe, and outer rim height middle part is low, sulfides with spiral guiding plate.
The top of gas-liquid separation re-injection part is a turbine, and the rotation of turbine needs very big air communication to come to drive, and it is very little that the wheel bar pump of bottom has discharge capacity, but the good characteristics of pressurized effect just in time meet the very little characteristics of gas well aquifer yield and gas production ratio.Turbine is in pure natural gas well section in the down-hole, bottom at turbine is provided with pore, natural gas enters oil pipe by pore, and in the oil pipe cavity, upwards flow until ground, natural gas drives the worm gear machine rotation when flowing through turbine, thereby for the work of whole system device provides power, screw pump is the supercharging equipment of formation water re-injection understratum, difference according to the product regimen condition of different gas wells, select the screw pump of different capacity and parameter for use, the top of screw pump is provided with the suction hole, the suction hole links to each other with spirality liquid collector groove in the oil jacket annular space, the liquid collector groove is made outer rim by elastomeric material and is close to internal surface of sleeve pipe, the effect of liquid collector groove is to compile the liquid stream that flows downward along casing wall, upper surface at annular collector groove is carved with the imbricate groove, converge the influence that fluid in the groove is not subjected to swirling eddy at liquid, between turbine and screw pump, there is drive link to be connected, gas-liquid separator is made up of the spiral septum that is arranged in the oil jacket annular space, angle of declination is arranged, in order on vertical, better mixed flow is played barrier effect, spiral septum is welded on the tubing nipple firmly, convenient working, remove simple, the spiral septum of gas-liquid separator is installed in the below of screw pump and the top that screw pump top liquid converges groove respectively, gas-liquid mixed stream upwards flows in oil sets annular space fast, during through helical baffle, under the barrier effect of dividing plate, begin to rotate, because drop has the potential energy bigger than gas, thereby produce bigger centrifugal force, centrifugal force makes drop form liquid stream along casing wall, gas then upwards flows near tubing wall, the liquid stream that flows downward along casing wall converges the groove place at liquid and converges and enter oil pipe through fluid bore, store in the oil pipe above screw pump, and sucked by screw pump, extruding enters the understratum.
The utility model foot is the sand control installation part, topmost is the oil pipe interplantation seal receptacle that is connected with the intubate of injection device tail end, tubing anchor under it, whole sand control installation is played the suspension effect, have successively screen casing, stainless steel fibre sand screen and up and down two cup packers, also in the stainless steel fibre sand screen, central tube is housed, in order to make follow-up fishing safety, adorning two safety pins below the epithelium wrist packer with above the hypodermis wrist packer respectively.When salvaging the bottom sand control installation, can divide for three steps carried out: at first to salvage the top safety pin with top (comprising tubing anchor, screen casing, top cup packer and central tube), next is the stainless steel fibre sand screen more than the safety pin of bottom can be salvaged after the central tube sand washing, can successfully the bottom be played at last the cup packer of packing oil jacket effect after to the pit shaft sand washing and salvage out.
The utility model utilizes the gas well producing pressure differential to be used as power, and realizes the process of gas-liquid separation, parting liquid re-injection understratum and stratum sand control automatically in the down-hole, and its application can reduce a large amount of ground installations, reduce pollution to ground environment, cut down the consumption of energy.The fixed structures that adopt make device have reliable and stable characteristics in the down-hole more on gas-liquid separator and sand control installation.The utlity model has simple in structure, use characteristics such as easy to operate, economy, environmental protection, the exploitation of shallow gas gas reservoir is had very important practical significance.
Description of drawings:
Fig. 1 down-hole gas-liquid separation re-injection sand control gas producing device schematic diagram
1, cup packer 2, pin 3, seal receptacle 4, metal wool filter screen 5, central tube 6, centralizer 7, screen casing 8, tubing anchor 9, sealing plug 10, screw pump pump block 11, hole 12, sleeve pipe 13, gear 14, gas turbine 15, power transmission shaft 16, liquid collector groove 17, spiral guiding plate 18, screw pump 19, screw pump rotor 20, seal receptacle 21, cup packer 22, pin 23, gas-bearing formation perforation eye 24, tubing string
The specific embodiment:
Now the utility model will be further described in conjunction with Figure of description.
The topmost of first is that gas turbine (14) directly is connected on the tubing string, link to each other by power transmission shaft (15) with the screw pump (18) of bottom, at the middle part of power transmission shaft (15) gear (13) is housed, the rotation of turbine (14) needs very big air communication to come to drive, and that screw pump (18) has a discharge opeing is very little, but the characteristics that pressurized effect is good just in time meet the very little characteristics of gas well aquifer yield and gas production ratio.Be furnished with the gas-liquid separator of forming by spiral guiding plate (17) at oil jacket annular space place, spiral guiding plate (17) has less angle of declination, in order on vertical, better mixed flow is played barrier effect, spiral septum is welded on the tubing nipple, convenient working, remove simply, can be used in combination as required.On the tubing string of screw pump (18) top, have the fluid hand-hole, fluid hand-hole place is provided with spirality liquid collector groove (16), liquid collector groove (16) is made by rubber, upper surface has imbrication shape groove line, outer rim is close to internal surface of sleeve pipe, outer rim height middle part is low, sulfides with spiral guiding plate.The foot of first is installed the sealing plug (9) of minor diameter, in the insertion seal receptacle (20) of sealing plug (9), two parts up and down of this device is linked together.
Second portion is the gas-bearing formation sand control installation.Topmost is that seal receptacle (20) is connected on the following tubing anchor (8), whole sand control installation is played suspension, fixation, connect screen casing (7) below the tubing anchor (8), in the inside of screen casing (7) a minor-diameter steel-tube central tube (5) is housed, central tube (5) top is connected with tubing anchor (8) with screw thread, insert in the seal receptacle (3) bottom, connect cup packer (21) in the below of screen casing (7), safety pin fixed (22) is housed under the cup packer (21), down be centralizer (6), next be the metal wool filter screen (4) of sand control, safety pin fixed (2) is housed below sand control filter screen (4) and lower seal seat (3), be bottom two back to cup packer (1).
This device is further specified in down-hole flow process angle from fluid below: as shown in Figure 1, at first be that gas-liquid mixed stream carries sand grains and goes out gas-bearing formation perforation eye (23), when fluid passes through metal wool filter screen (4), sand grains is filtered off and deposits in the following annular space of the above cup packer of cup packer (1) (22), gas-liquid mixed stream passes the annular space that metal wool filter screen (4) enters central tube (5) outside, and upwards enter the oil jacket annular space by screen casing (7), and upwards flow when arriving gas-liquid separation spiral guiding plate (17), under the barrier effect of ring diversion plate (17), fluid rotates.The potential energy that drop in the mixed flow of rotation has is much bigger than gas, promptly under action of centrifugal force, the fluid that contains more drop flows near sleeve pipe (12) inwall, when fluid-mixing arrives the fluid bore section on screw pump top, because portion gas enters oil pipe, flow rate of fluid is sharply descended, drop in the rotating fluid in the oil jacket annular space forms liquid stream at internal surface of sleeve pipe on the one hand, and flow downward along casing wall, pass fluid bore at liquid collector groove place along surperficial rill and flow into oil pipe (the imbricate rill can make liquid exempt from the influence of swirling eddy), liquid is deposited collection in oil pipe.On the other hand, upwards flow from oil pipe and oil jacket annular space two paths through the gas after separating, pass through gas turbine (14) on top, upwards go out gas well (production) along oil pipe, drive worm gear machine (14) rotation simultaneously, the high speed rotation of turbine (14) is passed to screw rod (18) after power transmission shaft (16) and gear (13) speed change, screw rod (18) rotation sucks the liquid in the oil pipe of top, and extruding flows downward fluid, passes central tube (5) and arrives the following water filling stratum of cup packer (1).
Claims (3)
1, a kind of down-hole gas-liquid separation re-injection sand control gas producing device, partly form by gas-liquid separation re-injection part and gas-bearing formation sand control, it is characterized in that gas-liquid separation re-injection part topmost is that gas turbine (14) is connected that (24) link to each other by power transmission shaft (15) with the screw pump (18) of bottom on the tubing string, gear (13) is equipped with at the middle part of power transmission shaft (15), be furnished with by spiral guiding plate (17) at oil jacket annular space place, and on the tubing string of screw pump (18) top, have hole (11), spirality liquid collector groove (16) is located to be equipped with in hole (11), gas-bearing formation sand control part, top is equipped with seal receptacle (20) and is connected with following tubing anchor (8), connect screen casing (7) below the tubing anchor (8), a central tube (5) is equipped with in the inside of screen casing (7), central tube (5) top is connected with tubing anchor (8) by screw thread, insert in the seal receptacle (3) bottom, the below of screen casing (7) connects cup packer (21), safety pin (22) is housed under cup packer (21) successively, centralizer (6), sand control metal wool filter screen (4), safety pin fixed (2), be bottom two back to cup packer (1).
2, down-hole gas-liquid separation re-injection sand control gas producing device according to claim 1 is characterized in that spiral guiding plate (17) has angle of declination and is fixed on the oil pipe (24).
3, down-hole gas-liquid separation re-injection sand control gas producing device according to claim 1, it is characterized in that liquid collector groove (16) made by rubber, upper surface has imbrication shape groove line, and outer rim is close to internal surface of sleeve pipe, outer rim height middle part is low, sulfides with spiral guiding plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420096603 CN2758474Y (en) | 2004-09-24 | 2004-09-24 | Under well gas liquid separating and back filling sand proof gas recovering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420096603 CN2758474Y (en) | 2004-09-24 | 2004-09-24 | Under well gas liquid separating and back filling sand proof gas recovering device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2758474Y true CN2758474Y (en) | 2006-02-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200420096603 Expired - Fee Related CN2758474Y (en) | 2004-09-24 | 2004-09-24 | Under well gas liquid separating and back filling sand proof gas recovering device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105298465A (en) * | 2015-11-25 | 2016-02-03 | 中国海洋石油总公司 | Sand-controlled pumping device of submarine caisson gas-liquid separator |
| CN106150465A (en) * | 2015-04-28 | 2016-11-23 | 中国石油化工股份有限公司 | Steam flooding well down-hole injecting method for implanting and device |
| CN111330360A (en) * | 2018-12-19 | 2020-06-26 | 赛峰传输系统 | Air/oil mixture separating device |
| CN112682022A (en) * | 2020-12-21 | 2021-04-20 | 西安石油大学 | Gas well is adjustable supersonic speed gas separation liquid reinjection device in pit |
| CN113404468A (en) * | 2021-08-02 | 2021-09-17 | 西南石油大学 | Novel gas-liquid separate production pipe column for underground drainage and gas production of sulfur-containing gas well |
-
2004
- 2004-09-24 CN CN 200420096603 patent/CN2758474Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106150465A (en) * | 2015-04-28 | 2016-11-23 | 中国石油化工股份有限公司 | Steam flooding well down-hole injecting method for implanting and device |
| CN106150465B (en) * | 2015-04-28 | 2018-12-11 | 中国石油化工股份有限公司 | Steam flooding well underground injecting method for implanting and device |
| CN105298465A (en) * | 2015-11-25 | 2016-02-03 | 中国海洋石油总公司 | Sand-controlled pumping device of submarine caisson gas-liquid separator |
| CN111330360A (en) * | 2018-12-19 | 2020-06-26 | 赛峰传输系统 | Air/oil mixture separating device |
| CN111330360B (en) * | 2018-12-19 | 2023-08-04 | 赛峰传输系统 | Air/oil mixture separation device |
| CN112682022A (en) * | 2020-12-21 | 2021-04-20 | 西安石油大学 | Gas well is adjustable supersonic speed gas separation liquid reinjection device in pit |
| CN112682022B (en) * | 2020-12-21 | 2022-05-27 | 西安石油大学 | Gas well is adjustable supersonic speed gas separation liquid reinjection device in pit |
| CN113404468A (en) * | 2021-08-02 | 2021-09-17 | 西南石油大学 | Novel gas-liquid separate production pipe column for underground drainage and gas production of sulfur-containing gas well |
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Legal Events
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |