CN204252939U - A kind of pressure type well cementation foamed cement generating means - Google Patents
A kind of pressure type well cementation foamed cement generating means Download PDFInfo
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- CN204252939U CN204252939U CN201420647404.5U CN201420647404U CN204252939U CN 204252939 U CN204252939 U CN 204252939U CN 201420647404 U CN201420647404 U CN 201420647404U CN 204252939 U CN204252939 U CN 204252939U
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Abstract
The utility model provides a kind of pressure type well cementation foamed cement generating means.Foam mixing chamber, trunnion and nozzle is had to be interconnected in described blender, trunnion is connected with nitrogen inlet in the vertical direction, blender is equipped with flow control valve respectively in cement paste import and nitrogen inlet two ends, blender and flow control valve touching position are equipped with seal washer, the fan-shaped back-up ring of reducer union assembly, wing nut are connected with blender with spring collar, and the through reducer union assembly of mixed liquor outlet opening is connected with foam mixing chamber.This device can access between well cementation plunger displacement pump and the high pressure pipe joint of well head, allow cement paste and nitrogen mix and directly to enter in well head in situation with pressure work, pressure cement foam being formed and work continues to have substantially, can not make bubble burst because the fierceness of pressure changes.
Description
Technical field
The utility model relates to drilling equipment field, is related specifically to a kind of pressure type well cementation foamed cement generating means.
Background technology
Foamed cement well cementation is mainly combined with low-density cement mortar by manufacturing foam, forms ultralow density cement slurries, thus reduces the head of liquid of annular space cement paste section, to solve the various problems of low pressure and easy leaking oil reservoir, and play the effect of formation protection.Due to foamed cement, to possess density low, and intensity is high, good anti-channeling, the good characteristics such as suitable thixotropy, is particularly suitable for the well cementing operation of long cementing interval well cementation and Absorption Wells of Low Pressure.
At present, the method manufacturing foam slurry mainly contains two kinds: one is mechanical aeration method, namely the gas being filled with any design flow in light water mud by mechanical means is referred to, and add surfactant and carry out stable foam, in cement paste, form evenly tiny foam by manual intervention, reach the object reducing cement slurry density.Use Mechanical Method to prepare foam slurry pulping effective, the gas that can realize any design flow is filled with, and the foam of formation is evenly tiny, and density is controlled; But due to defects such as ground corollary equipment is more, complicated construction techniques, not yet spread at present.Another kind is chemical gas generation method, is namely to mix a certain amount of blowing agent in dry cement, and when after cement and water mix and blend, some chemical composition in blowing agent and cement reacts generation gas, to be distributed in cement paste thus to form foamed cement.When using chemical gas generation legal system to make foamed cement, the cementing operation equipment of needs is less compared with mechanical aeration method, except conventional well cementation equipment and facility, as outside cementing truck, grey car etc., only needs increase by note infusion car.Chemical gas generation method easy construction, but gas forming amount is less, especially in the well of head of liquid more than 10MPa, due to the effect bubble-break of pressure or the very little of change, this foam slurry is difficult to the density significantly reducing cement paste in down-hole, Given this current in the cementing operation of solution low pressure and leakmess formation, main employing mechanical aeration method; And chemical gas generation rule is used for solving the problems such as " weightlessness " of cement after cementing operation.According to existing experiment, cement paste mechanical aeration method has three kinds of modes: mix in mixed stock tank, mix in plunger displacement pump, mix under hyperbaric environment after plunger displacement pump.Come from the experimental results, mix in mixed stock tank and mix not ideal in plunger displacement pump, the well cementation effect that the foam be mixed to form under hyperbaric environment after plunger displacement pump has just had.
Summary of the invention
The purpose of this utility model is to provide the pressure type fixed foam cement generating means increasing gas-liquid mixed between a kind of plunger displacement pump at well cementation pump truck and the high pressure pipe joint of well head.
For achieving the above object, the technical solution of the utility model is:
A kind of pressure type well cementation foamed cement generating means, comprise blender, wing nut, fan-shaped back-up ring, reducer union assembly, spring collar, seal washer, flow control valve, foam mixing chamber, trunnion and nozzle, in described blender, there is foam mixing chamber one end, one end of foam mixing chamber is connected with trunnion, the trunnion other end is connected with nozzle, trunnion is connected with nitrogen inlet in the vertical direction, blender is equipped with flow control valve respectively in cement paste import and nitrogen inlet two ends, blender and flow control valve touching position are equipped with seal washer, the fan-shaped back-up ring of reducer union assembly is connected with blender, and it is fastening with wing nut, spring collar is equipped with in the outside of wing nut, the through reducer union assembly of mixed liquor outlet opening is connected with foam mixing chamber.
Good effect of the present utility model is:
1, this device can access between well cementation plunger displacement pump and the high pressure pipe joint of well head, allow the cement and nitrogen being added with additive mix and directly to enter in well head in situation with pressure work, pressure cement foam being formed and work continues to have substantially, can not make bubble burst because the fierceness of pressure changes;
2, this device make use of Venturi effect, when the cement liquid being mixed with additive can be accelerated by the flow velocity of fluid during the flow section that reduces, and by the increase of the known flow velocity of bernoulli law with the reduction of fluid pressure, and namely common venturi phenomenon;
3, pressure type well cementation foam proportioner carrys out transferring energy according to the mutual shock between jet particle, therefore can produce a large amount of vortexs in mixed process, produce friction loss at trunnion inwall and in anemostat, produce divergence loss all can cause a large amount of hydraulic losses.So reduce one of key factor considered when hydraulic loss is pressure air-foam proportioner design.
Accompanying drawing explanation
Fig. 1, pressure type well cementation foamed cement generating means sectional structure schematic diagram;
Fig. 2, blender sectional structure schematic diagram.
Detailed description of the invention
Detailed description of the invention of the present utility model is further illustrated below in conjunction with attached Fig. 1 and 2.
See Fig. 1 and 2, during work, cement paste enters from the cement paste import 11 of blender 1, enter in foam mixing chamber 8 by nozzle 10 and trunnion 9, when the cement liquid being mixed with additive is by the flow section trunnion 9 that reduces, flow rate of liquid is accelerated to form negative pressure, thus suck nitrogen by nitrogen inlet 12, nitrogen enters in foam mixing chamber 8 with cement liquid jointly, expansion due to caliber makes pressure reduce, nitrogen and cement liquid mix in foam mixing chamber 8, form well cementation foam, pass through again with fan-shaped back-up ring 3, the reducer union assembly 4 that wing nut 2 is connected with blender 1 with spring collar 5, directly entered in well head by mix-froth outlet opening 13.The flow control valve 7 be connected with blender 1 is for controlling the inlet of cement paste and nitrogen, and seal washer 6 is for preventing gas leakage, leaking.
Claims (1)
1. a pressure type well cementation foamed cement generating means, comprise blender (1), wing nut (2), fan-shaped back-up ring (3), reducer union assembly (4), spring collar (5), seal washer (6), flow control valve (7), foam mixing chamber (8), trunnion (9) and nozzle (10), it is characterized in that: there is foam mixing chamber (8) one end, blender (1) interior space, one end of foam mixing chamber (8) is connected with trunnion (9), trunnion (9) other end is connected with nozzle (10), trunnion (9) is connected with nitrogen inlet (12) in the vertical direction, blender (1) is equipped with flow control valve (7) respectively in cement paste import (11) and nitrogen inlet (12) two ends, blender (1) and flow control valve (7) touching position are equipped with seal washer (6), reducer union assembly (4) fan-shaped back-up ring (3) is connected with blender (1), and it is fastening with wing nut (2), spring collar (5) is equipped with in the outside of wing nut (2), the through reducer union assembly (4) of mixed liquor outlet opening (13) is connected with foam mixing chamber (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420647404.5U CN204252939U (en) | 2014-11-03 | 2014-11-03 | A kind of pressure type well cementation foamed cement generating means |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420647404.5U CN204252939U (en) | 2014-11-03 | 2014-11-03 | A kind of pressure type well cementation foamed cement generating means |
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| CN204252939U true CN204252939U (en) | 2015-04-08 |
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| CN201420647404.5U Active CN204252939U (en) | 2014-11-03 | 2014-11-03 | A kind of pressure type well cementation foamed cement generating means |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105666697A (en) * | 2016-01-29 | 2016-06-15 | 湖北大学 | Foam concrete preparation system and foam concrete preparation method |
| CN105666692A (en) * | 2016-01-29 | 2016-06-15 | 湖北大学 | Low-foam-break-rate foam concrete preparation system |
| CN109397538A (en) * | 2017-08-16 | 2019-03-01 | 中国石油化工股份有限公司 | A kind of foam slurry generator and cement slurry air charging system with pressure and its application |
| CN110487475A (en) * | 2018-05-15 | 2019-11-22 | 中国石油化工股份有限公司 | Pressure monitoring device and method between a kind of foam slurry waiting-on-cement |
| CN110585947A (en) * | 2019-09-20 | 2019-12-20 | 西南石油大学 | Foam drilling fluid produces device |
| CN111888960A (en) * | 2020-07-29 | 2020-11-06 | 中石化四机石油机械有限公司 | Foam generating device for petroleum drilling and production well cementation operation and foaming method thereof |
-
2014
- 2014-11-03 CN CN201420647404.5U patent/CN204252939U/en active Active
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105666697A (en) * | 2016-01-29 | 2016-06-15 | 湖北大学 | Foam concrete preparation system and foam concrete preparation method |
| CN105666692A (en) * | 2016-01-29 | 2016-06-15 | 湖北大学 | Low-foam-break-rate foam concrete preparation system |
| CN105666692B (en) * | 2016-01-29 | 2019-03-15 | 湖北大学 | A kind of low brokenly bubble rate foam concrete preparation system |
| CN109397538A (en) * | 2017-08-16 | 2019-03-01 | 中国石油化工股份有限公司 | A kind of foam slurry generator and cement slurry air charging system with pressure and its application |
| CN110487475A (en) * | 2018-05-15 | 2019-11-22 | 中国石油化工股份有限公司 | Pressure monitoring device and method between a kind of foam slurry waiting-on-cement |
| CN110487475B (en) * | 2018-05-15 | 2021-03-16 | 中国石油化工股份有限公司 | Pressure monitoring device and method for foam cement slurry during waiting period |
| CN110585947A (en) * | 2019-09-20 | 2019-12-20 | 西南石油大学 | Foam drilling fluid produces device |
| CN110585947B (en) * | 2019-09-20 | 2022-02-25 | 西南石油大学 | Foam drilling fluid produces device |
| CN111888960A (en) * | 2020-07-29 | 2020-11-06 | 中石化四机石油机械有限公司 | Foam generating device for petroleum drilling and production well cementation operation and foaming method thereof |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20171115 Address after: 434020 No. 1 Longshan Temple Street, Jingzhou District, Jingzhou, Hubei Co-patentee after: SINOPEC OILFIELD EQUIPMENT CORPORATION Patentee after: Four Sinopec Petroleum Machinery Co. Ltd. Address before: 434020 Jingzhou city of Hubei province Jingzhou district four Road No. 73 Patentee before: SJ Petroleum Machinery Co., SINOPEC |