CN203285371U - Drilling fluid circulation system for nitrogen foam drilling - Google Patents
Drilling fluid circulation system for nitrogen foam drilling Download PDFInfo
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- CN203285371U CN203285371U CN2013202721212U CN201320272121U CN203285371U CN 203285371 U CN203285371 U CN 203285371U CN 2013202721212 U CN2013202721212 U CN 2013202721212U CN 201320272121 U CN201320272121 U CN 201320272121U CN 203285371 U CN203285371 U CN 203285371U
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Abstract
A drilling fluid circulation system for nitrogen foam drilling aims to overcome the defects that existing nitrogen foam drilling is large in nitrogen generation equipment investment and high in drilling cost. A liquid nitrogen pump of the drilling fluid circulation system is driven by a diesel engine. The inlet end of the liquid nitrogen pump is communicated with a liquid nitrogen tank car through a pipeline, and the outlet end of the liquid nitrogen pump is connected with a liquid nitrogen evaporator through a pipeline. The liquid nitrogen evaporator is arranged in a slurry pond. The outlet end of the liquid nitrogen evaporator is communicated with the inlet end of a foam generator through a pipeline, and the outlet end of the foam generator is communicated with a well mouth through a pipeline. The well mouth is provided with a drilling fluid discharging pipeline which is provided with a gas-liquid separator. A slurry pump is driven by the diesel engine, the inlet end of the slurry pump is communicated with the slurry pond through a pipeline, and the outlet end of the slurry pump is communicated with the foam generator through a pipeline. The drilling fluid circulation system has the advantages of being simple in structure, effectively simplifying required nitrogen obtaining procedures of the nitrogen foam drilling, being beneficial to large popularization of the nitrogen drilling, improving the drilling speed, and finally reducing drilling cost.
Description
Technical field
The utility model relates to a kind of device that nitrogen foam drilling well desired gas is provided, and especially relates to a kind of drilling-fluid circulation system of nitrogen foam drilling well.
Background technology
Under balance pressure drilling is the new technology of a ripe and drilling well developing rapidly the nineties in 20th century.In the U.S., under balance pressure drilling is called as upstream petroleum industry new technology, has become the drilling technology Hot spots for development, and combines with horizontal well, multilateral well and SLIM-HOLE DRILLING TECHNOLOGY more and more.The advantage of under balance pressure drilling is to improve the rate of penetration that hard formation creeps into, and reduces leakage, differential sticking, formation damage etc., is conducive in time find the Oil/gas Well stratum, and improves output.
At present, developed multiple under-balanced drilling technologies such as having formed air drilling, nitrogen foam drilling well, gas drilling, aeration drilling, nozzling while drilling, under balance pressure drilling is widely used.When creeping into reservoir, mix with natural gas for fear of air and produce the down-hole blasting accident, usually adopt nitrogen as taking the rock medium.the nitrogen foam under-balanced drilling technology is also one, when the nitrogen foam drilling well refers to drilling well with a large amount of nitrogen dispersions technology as circulatory mediator in the liquid that contains on a small quantity frother (surfactant), has the raising rate of penetration, extend drilling life of bit, shorten drilling period, reduce drilling cost, reducing drilling failure occurs, avoid occurring well shooting or pit shaft pyrophoricity accident, reduce formation damage, be conducive to find oil-gas reservoir, protection of the environment, reduce the advantages such as well stimulation operation cost, especially in the exploitation hyposmosis, the low-pressure reservoir, unconventional petroleum resources and old oil gas field transformation aspect play an important role.
The drilling-fluid circulation system (referring to Fig. 1) of existing nitrogen foam drilling well, at first isolate airborne nitrogen by air compressor machine 1 and film nitrogen making machine 2, nitrogen forms foam base fluid (perhaps directly by liquid nitrogen pump vehicle 5 output high pressure nitrogens by supercharger 3 and foam maker 4, nitrogen forms foam base fluid through foam maker 4), flow through after evolution liquid device 6, the mud that pumps with slush pump 7 is mixed into nitrogen foam mud drilling liquid; Then, nitrogen foam mud drilling liquid flows back to mud pit 13 successively after the annular space 10 of standpipe 8, drilling tool 9 and drill string, preventer 11, solid controlling system 12, and drilling fluid is completed a circulation.Drilling fluid is by continuous circulation aboveground, down-hole, for the nitrogen foam drillng operation provides required drilling fluid.
The nitrogen foam drilling fluid is mixed by drilling mud base fluid, foaming agent and nitrogen.Wherein, the generation of nitrogen is many to be realized by on-the-spot nitrogen making machine, then by compressor, foam-making apparatus, booster pump, it is mixed with the mud base fluid, forms the nitrogen foam drilling fluid.Also can produce high pressure nitrogens by liquid nitrogen pump vehicle 5 mixes with foaming agent, mud base fluid and forms the nitrogen foam drilling fluid.No matter by nitrogen making machine, compressor, booster pump or by the mode of liquid nitrogen pump vehicle, produce nitrogen, have all that the equipment of making nitrogen is supporting to have high input, cause the high deficiency of drilling cost, restricted applying of nitrogen foam drilling technology.
The utility model content
The equipment of making nitrogen is supporting to have high input in order to overcome in existing nitrogen foam drilling well, causes the high deficiency of drilling cost, and the utility model provides a kind of drilling-fluid circulation system of nitrogen foam drilling well.
The technical scheme that its technical problem that solves the utility model adopts is: the drilling-fluid circulation system of nitrogen foam drilling well comprises foam maker, slush pump, mud pit, and liquid nitrogen pump is by diesel engine drives; The arrival end of liquid nitrogen pump is by pipeline and liquid nitrogen tank car UNICOM, and the port of export of liquid nitrogen pump is connected with liquid nitrogen evaporator by pipeline; Liquid nitrogen evaporator is placed in described mud pit.The port of export of liquid nitrogen evaporator is by the entrance point UNICOM of pipeline and foam maker, and the port of export of foam maker is by pipeline and well head UNICOM; Well head is equipped with the drilling fluid discharge pipe, and the other end of drilling fluid discharge pipe leads to mud pit, on the drilling fluid discharge pipe, gas-liquid separator is installed.Slush pump is by diesel engine drives, and the arrival end of slush pump is by pipeline and mud pit UNICOM, and the port of export of slush pump is by pipeline and foam maker UNICOM.On the connecting line of liquid nitrogen evaporator and foam maker, ball-and-seat is installed; On the connecting line of slush pump and foam maker, ball-and-seat is installed.
The beneficial effects of the utility model are, and are simple in structure, effectively simplified the flow process that obtains the required nitrogen of nitrogen foam drilling well, are conducive to the large-scale popularization nitrogen injection drilling, improve bit speed, finally reduce drilling cost.
Description of drawings
Fig. 1 is existing nitrogen foam drilling well circulation process figure.
Fig. 2 is the drilling-fluid circulation system flow chart of the utility model nitrogen foam drilling well.
In figure: 1. air compressor machine, 2. film nitrogen making machine, 3. supercharger, 4. foam maker, 5. liquid nitrogen pump vehicle, 6. evolution liquid device, 7. slush pump, 8. standpipe, 9. drilling tool, 10. annular space, 11. preventers, 12. solid controlling systems, 13. mud pit, 21. Diesel engines, 22. liquid nitrogen pumps, 23. liquid nitrogen tank cars, 24. Diesel engine, 25. drilling fluid discharge pipes, 26. well heads, 27. gas-liquid separator, 28. ball-and-seats, 29. liquid nitrogen evaporators.
The specific embodiment
The utility model is described in further detail below in conjunction with accompanying drawing 2 and embodiment.But what those skilled in the art should know is to the invention is not restricted to the listed specific embodiment, as long as spirit according to the invention all should be included in protection domain of the present utility model.
Referring to accompanying drawing 2.The liquid nitrogen pump 22 of the drilling-fluid circulation system of nitrogen foam drilling well is driven by Diesel engine 21; The arrival end of liquid nitrogen pump 22 is by pipeline and liquid nitrogen tank car 23 UNICOMs, and the port of export of liquid nitrogen pump 22 is connected with liquid nitrogen evaporator 29 by pipeline.Liquid nitrogen evaporator 29 is placed in mud pit 13; The port of export of liquid nitrogen evaporator 29 is by the entrance point UNICOM of pipeline and foam maker 4, and the port of export of foam maker 4 is by pipeline and well head 26 UNICOMs.
On the connecting line of liquid nitrogen evaporator 29 and foam maker 4, ball-and-seat 28 is installed; On the connecting line of slush pump 7 and foam maker 4, ball-and-seat 20 is installed.
The drilling-fluid circulation system of the utility model nitrogen foam drilling well is to utilize liquid nitrogen heat absorption evaporation to become the principle of nitrogen, produces the needed nitrogen of nitrogen foam drilling well.Namely by Diesel engine 21(or motor) liquid nitrogen pump 22 that drives is transported to liquid nitrogen evaporator 23 with liquid nitrogen, in the mud slurry environments of liquid nitrogen evaporator 23 as for mud pit 13, the underground heat that utilizes mud liquid to take out of in the drillng operation cyclic process, realize interchange of heat in liquid nitrogen evaporator 23, liquid nitrogen is changed into nitrogen, and with the mud base fluid that slush pump 7 is got, be mixed, form the nitrogen foam drilling fluid through foam maker 4, for drilling well.
As everyone knows, drilling fluid (mud) is the cyclic flusher medium that uses in drilling process, absorbs underground heat, absorb the heat that drill bit, drilling tool and rock frictional test produce, have higher temperature, and, by continuous circulation aboveground, down-hole, have all the time higher heat.Utilize mud underground heat not need separately to join thermal source, make the characteristics energy-conservation, easy realization that the utlity model has.
Heat in liquid nitrogen evaporator 29 absorbent slurry decreases the mud temperature.On the one hand, the drilling fluid temperature reduction generally is no more than 10 degree, can accept on engineering; On the other hand, reduce drilling fluid temperature for the high temperature reservoir and be conducive to the exploitation of oil (gas) Tibetan.
Plant-manufactured cheap liquid nitrogen is housed in the liquid nitrogen tank car 23 in the drilling-fluid circulation system of the utility model nitrogen foam drilling well, after being transported to well site, offer liquid nitrogen pump 13 by pipeline, liquid nitrogen pump 13 is selected high-pressure plunger pump usually, liquid nitrogen pressure can be risen to the required operating pressure of drilling well.Liquid nitrogen becomes high-pressure liquid nitrogen through liquid nitrogen pump 13 and enters the liquid nitrogen evaporator 29 that is immersed in mud pit 13, high-pressure liquid nitrogen in liquid nitrogen evaporator 29 has absorbed the underground heat in mud, be evaporated to gases at high pressure, by with foaming agent, mud, mixing, form the nitrogen foam drilling liquid flow to well head, for the operation of nitrogen foam wellbore construction.
The nitrogen injection drilling desired gas device that the drilling-fluid circulation system of the utility model nitrogen foam drilling well provides, simple in structure, have obtain the required gas of nitrogen foam drilling well easily, the low characteristics of nitrogen cost processed, be conducive to be applied to nitrogen injection drilling, improve bit speed, finally reduce drilling cost.
It should be noted that above-described embodiment is example and unrestricted the present invention, those skilled in the art can design a lot of alternate embodiments and not break away from the claim scope of this patent.
Claims (2)
1. the drilling-fluid circulation system of a nitrogen foam drilling well, comprise foam maker, slush pump, mud pit, it is characterized in that:
Liquid nitrogen pump (22) is driven by Diesel engine (21); The arrival end of liquid nitrogen pump (22) is by pipeline and liquid nitrogen tank car (23) UNICOM, and the port of export of liquid nitrogen pump (22) is connected with liquid nitrogen evaporator (29) by pipeline;
Described liquid nitrogen evaporator (29) is placed in described mud pit (13); The port of export of liquid nitrogen evaporator (29) is by the entrance point UNICOM of pipeline and foam maker (4), and the port of export of foam maker (4) is by pipeline and well head (26) UNICOM;
Described well head (26) is equipped with drilling fluid discharge pipe (25), and the other end of drilling fluid discharge pipe (25) leads to mud pit (13), and gas-liquid separator (27) is installed on drilling fluid discharge pipe (25);
Described slush pump (7) is driven by Diesel engine (24), and the arrival end of slush pump (7) is by pipeline and mud pit (13) UNICOM, and the port of export of slush pump (7) is by pipeline and foam maker (4) UNICOM.
2. the drilling-fluid circulation system of nitrogen foam drilling well according to claim 1 is characterized in that: on the connecting line of described liquid nitrogen evaporator (29) and foam maker (4), ball-and-seat (28) is installed; On the connecting line of described slush pump (7) and foam maker (4), ball-and-seat (28) is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202721212U CN203285371U (en) | 2013-05-17 | 2013-05-17 | Drilling fluid circulation system for nitrogen foam drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202721212U CN203285371U (en) | 2013-05-17 | 2013-05-17 | Drilling fluid circulation system for nitrogen foam drilling |
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| Publication Number | Publication Date |
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| CN203285371U true CN203285371U (en) | 2013-11-13 |
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| CN2013202721212U Withdrawn - After Issue CN203285371U (en) | 2013-05-17 | 2013-05-17 | Drilling fluid circulation system for nitrogen foam drilling |
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| CN (1) | CN203285371U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104165033A (en) * | 2013-05-17 | 2014-11-26 | 中国石油天然气集团公司 | Drilling fluid circulating system for nitrogen foam drilling |
| CN104330293A (en) * | 2014-10-24 | 2015-02-04 | 中石化石油工程技术服务有限公司 | Energy storage liquid bubble drilling fluid generating device, rheological property testing device and method |
| CN111305804A (en) * | 2020-02-24 | 2020-06-19 | 中石化重庆涪陵页岩气勘探开发有限公司 | Drilling plug liquid for drilling bridge plug after fracturing of shale gas horizontal well and preparation method thereof |
| US11559711B2 (en) | 2017-03-01 | 2023-01-24 | China Petroleum & Chemical Corporation | Foam producing method, fire extinguishing method, and appliance for foam extinguishing |
-
2013
- 2013-05-17 CN CN2013202721212U patent/CN203285371U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104165033A (en) * | 2013-05-17 | 2014-11-26 | 中国石油天然气集团公司 | Drilling fluid circulating system for nitrogen foam drilling |
| CN104330293A (en) * | 2014-10-24 | 2015-02-04 | 中石化石油工程技术服务有限公司 | Energy storage liquid bubble drilling fluid generating device, rheological property testing device and method |
| US11559711B2 (en) | 2017-03-01 | 2023-01-24 | China Petroleum & Chemical Corporation | Foam producing method, fire extinguishing method, and appliance for foam extinguishing |
| US11980785B2 (en) | 2017-03-01 | 2024-05-14 | China Petroleum & Chemical Corporation | Foam producing method, fire extinguishing method, and appliance for foam extinguishing |
| CN111305804A (en) * | 2020-02-24 | 2020-06-19 | 中石化重庆涪陵页岩气勘探开发有限公司 | Drilling plug liquid for drilling bridge plug after fracturing of shale gas horizontal well and preparation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20131113 Effective date of abandoning: 20161012 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |