CN102182411A - Method for increasing injection pressure of shaft bottom drilling fluid by use of bit pressure fluctuation - Google Patents
Method for increasing injection pressure of shaft bottom drilling fluid by use of bit pressure fluctuation Download PDFInfo
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- CN102182411A CN102182411A CN2011101010562A CN201110101056A CN102182411A CN 102182411 A CN102182411 A CN 102182411A CN 2011101010562 A CN2011101010562 A CN 2011101010562A CN 201110101056 A CN201110101056 A CN 201110101056A CN 102182411 A CN102182411 A CN 102182411A
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Abstract
The invention relates to a method for increasing injection pressure of shaft bottom drilling fluid by use of bit pressure fluctuation. The method comprises the following steps: the drilling fluid in a mud pit is powered by a mud pump to enter a drill column, and shunted by a shunting structure; one part of the drilling fluid is sprayed through a common nozzle to act as regular drilling fluid, and the circular flow of the part of the drilling fluid is free from interference of the process of increasing the injection pressure of shaft bottom drilling fluid of the other part; and another small part of drilling fluid enters a power conversion unit through an entrance one-way valve of a column power conversion unit to obtain a power source, is exhausted ny an outlet check valve after reaching a pressure through reducing energy obtained by bit pressure fluctuation, and then is sprayed through an ultrahigh-pressure nozzle to realize direct or auxiliary rock breaking with ultrahigh-pressure jet flow. Through field application, the drilling speed of a deep hard formation layer is improved by 1-5 times compared with that of a conventional drilling method, and large-amplitude fluctuation of bit pressure observed on the drill stand is obviously improved; and practice indicates that: the method increases the injection pressure of the shaft bottom drilling fluid, and effectively reduces fluctuation of the shaft bottom bit pressure.
Description
One, technical field:
The present invention relates to a kind of oil and gas drilling engineering field, particularly a kind of method of utilizing the pressure of the drill fluctuation to improve shaft bottom drilling fluid expulsion pressure.
Two, background technology:
The major advantage that the down-hole installation special tool improves shaft bottom drilling fluid expulsion pressure method is needn't change under existing drilling technology and the appointed condition, can reach high-pressure spray directly or the purpose of auxiliary rock.But how to improve the expulsion pressure of shaft bottom drilling fluid, be the problem that drilling engineering personnel and technological invention person attempt to solve always.The method operation power of the expulsion pressure of present existing raising shaft bottom drilling fluid all is that implementation procedure is for to transfer to the sub-fraction drilling fluid by special tool with the energy of most of drilling fluid from the entrained pressure energy of drilling fluid itself.This method implementation procedure and application process face a following difficult problem: 1. the special tool structure of designing according to this method is comparatively complicated, makes its life-span and safety in underground work be difficult to ensure; 2. along with the increase of well depth, circulation presses consumption to increase, and the drilling well pressure energy reduces, and the effect that improves shaft bottom drilling fluid expulsion pressure can be affected; 3. improve the impact that shaft bottom drilling fluid expulsion pressure process causes and the intrinsic vibration of drill string and may produce coupling phenomenon, influence drill bit and drilling tool working life; Can produce a constant pressure drop during special tool operate as normal 4. designed according to this method, increase the service load of the circulating system, also may influence the performance of some normal functions of drilling fluid; 5. all drilling fluid all participates in energy transfer process, if instrument lost efficacy in the down-hole, can cause circulation of drilling fluid to be obstructed, to construct can't carry out, even produces serious consequence.Therefore, although the researcher has carried out painstaking efforts and research with great concentration, the method for above-mentioned raising shaft bottom drilling fluid expulsion pressure is not applied yet.
Three, summary of the invention:
Purpose of the present invention is exactly the above-mentioned defective that exists at prior art, a kind of method of utilizing the pressure of the drill fluctuation to improve shaft bottom drilling fluid expulsion pressure is provided, the power source of the expulsion pressure method of this kind raising shaft bottom drilling fluid is the shaft bottom the pressure of the drill fluctuation in the drilling process, utilizes the energy that reduces the acquisition of the pressure of the drill fluctuating range to improve shaft bottom drilling fluid expulsion pressure.Accomplish both to reduce the pressure of the drill fluctuation to the adverse effect that drilling process produces, guarantee that construction safety carries out, improve shaft bottom drilling fluid expulsion pressure again.
Its technical scheme is may further comprise the steps: the power that the power source of employing provides for the pressure of the drill fluctuation that produces on the drill string body, implementation process is: enter the drill string inner chamber after drilling fluid provides power by slush pump in the mud pit, shunt through diversion mechanism, most of drilling fluid is by the ejection of normal pressure nozzle, the function of performance conventional drilling liquid, this part drilling fluid circulate the interference that is not subjected to improve another part shaft bottom drilling fluid expulsion pressure process; Another fraction drilling fluid enters power converting unit through the power converting unit inlet one-way valve, reach 80-100Mpa or higher pressure after obtaining power source and reducing energy that the pressure of the drill fluctuating range obtains, discharge through power converting unit outlet one way valve, realize the direct or auxiliary rock of superhigh pressure water jet by the ejection of superhigh pressure water jet nozzle; Wherein, two parts drilling fluid of flow dividing structure shunting along two independently runner flow to the shaft bottom, do not produce interference each other; The effect of power converting unit is the excessive the pressure of the drill fluctuation of balance, and the energy that will reduce the acquisition of the pressure of the drill fluctuating range is transferred to drilling fluid and improves drilling fluid injection pressure energy.
Above-mentioned power converting unit comprises that power transforms cavity, the pressure of the drill transmits bar, flexible member, the drill string body, the lubricating fluid body cavity, the raising of drilling fluid expulsion pressure is finished in the power conversion cavity, when the pressure of the drill on the drill string body increases, the pressure of the drill transmits drilling fluid and the flexible member in the bar compression power transfer chamber, the increase of drilling liquid pressure makes the power converting unit inlet one-way valve close in the power conversion cavity, power converting unit outlet one way valve is opened, the drilling fluid of acquisition power source energy is discharged through power converting unit outlet one way valve, realizes the direct or auxiliary rock of superhigh pressure water jet by the ejection of superhigh pressure water jet nozzle.
Above-mentioned flexible member bears the pressure that the pressure of the drill transmits bar, produces compression and accumulation of energy, and the lubricating fluid on the flexible member is pressed into the lubricating fluid body cavity at this moment; When the pressure of the drill on the drill string body reduces, bear the pressure that the pressure of the drill transmits bar, the flexible member of generation compress energy storage stretches and releases energy, and makes the power conversion cavity internal pressure reduce; The power converting unit inlet one-way valve is opened, power converting unit outlet closed check valve, and the power conversion cavity flows into drilling fluid, and the lubricating fluid in the lubricating fluid body cavity flows back to flexible member simultaneously, the lubricated and cooling for flexible member.
Two parts drilling fluid of above-mentioned flow dividing structure shunting along two independently runner flow to the shaft bottom, do not produce interference each other; After power converting unit lost efficacy, provide the drilling fluid that enters the drill string inner chamber behind the power directly to enter into the ejection of normal pressure nozzle by diversion mechanism by slush pump.
The invention has the beneficial effects as follows: 1. utilize this method can reduce shaft bottom the pressure of the drill fluctuating range, thereby reduce the harm that the pressure of the drill fluctuates widely and brings to drilling tool and equipment, increase the safety of creeping into operation.2. will obtain the drilling fluid of power source energy, utilize special-purpose runner of super-pressure drilling fluid and special nozzle ejection, realize the direct or auxiliary rock of superhigh pressure water jet, can improve bit speed, become harmful into favourable.3. this utilizes the pressure of the drill fluctuation to improve the method for shaft bottom drilling fluid expulsion pressure, does not need special drilling technology to ensure, does not need to change and the increase land equipment, does not influence normal circulation of drilling fluid and creeps into operation.Even if the power converting unit disabler still can balance the pressure of the drill, circulating fluid guarantees normally carrying out of wellbore construction.4. the principle of this method is simple, realizes that this method does not need complicated instrument and structure, dislikes operating mode slightly in the down-hole and is more prone to reach on-the-spot requirement tool life that proposes.5. utilize the pressure of the drill fluctuation to improve the fluctuation of energy source-shaft bottom the pressure of the drill of the method for shaft bottom drilling fluid expulsion pressure, this fluctuation is along with the increase of well depth and complicated of formation lithology can not increase and can reduce, overcome the problem that deep-well underground hydraulic pressure energy source weakens along with the increase of well depth effectively, for the increase of deep-well, ultradeep well shaft bottom drilling fluid expulsion pressure provides energy safeguard.
Four, description of drawings:
Accompanying drawing 1 is a fundamental diagram of the present invention.
Five, the specific embodiment:
In conjunction with the accompanying drawings 1, the invention will be further described:
The present invention includes mud pit 1, slush pump 2, drill string inner chamber 3, diversion mechanism 4, normal pressure nozzle 5, power converting unit inlet one-way valve 6, power converting unit outlet one way valve 7, superhigh pressure water jet nozzle 8, power conversion cavity 9, the pressure of the drill transmission bar 10, flexible member 11, drill string body 12, lubricating fluid body cavity 13.
The power that the power source that the present invention improves shaft bottom drilling fluid expulsion pressure provides for the pressure of the drill fluctuation that produces on the drill string body 12, implementation process is: enter drill string inner chamber 3 after drilling fluid provides power by slush pump 2 in the mud pit 1, through diversion mechanism 4 shuntings, most of drilling fluid is by 5 ejections of normal pressure nozzle, the function of performance conventional drilling liquid, this part drilling fluid circulate the interference that is not subjected to improve another part shaft bottom drilling fluid expulsion pressure process; Another fraction drilling fluid enters power converting unit through power converting unit inlet one-way valve 6, obtain reaching 80-100Mpa or higher pressure behind the energy that power source-reduce the pressure of the drill fluctuating range obtains, discharge through power converting unit outlet one way valve 7, realize the direct or auxiliary rock of superhigh pressure water jet by 8 ejections of superhigh pressure water jet nozzle.The raising of drilling fluid expulsion pressure is finished in power conversion cavity 9, when the pressure of the drill on the drill string body 12 increases, the pressure of the drill transmits drilling fluid and the flexible member 11 in the bar 10 compression power transfer chamber 9, the increase of drilling liquid pressure makes power converting unit inlet one-way valve 6 close in the power conversion cavity 9, power converting unit outlet one way valve 7 is opened, the drilling fluid of acquisition power source energy is discharged through power converting unit outlet one way valve 7, realizes the direct or auxiliary rock of superhigh pressure water jets by 8 ejections of superhigh pressure water jet nozzle; Flexible member 11 bears the pressure that the pressure of the drill transmits bar 10, produces compression, accumulation of energy, and the lubricating fluid on the flexible member 11 is pressed into lubricating fluid body cavity 13 at this moment.When the pressure of the drill on the drill string body 12 reduces, bear the pressure that the pressure of the drill transmits bar 10, the flexible member 11 of generation compress energy storage stretches and releases energy, and makes power conversion cavity 9 internal pressures reduce.Power converting unit inlet one-way valve 6 is opened, and power converting unit outlet one way valve 7 is closed, and power conversion cavity 9 flows into drilling fluid, and the lubricating fluid in the lubricating fluid body cavity 13 flows back to flexible member 11 simultaneously, is flexible member 11 lubricated and coolings.
Two parts drilling fluid of flow dividing structure 4 shunting along two independently runner flow to the shaft bottom, do not produce interference each other.After power converting unit lost efficacy, provide the drilling fluid that enters drill string inner chamber 3 behind the power directly to enter into 5 ejections of normal pressure nozzle by slush pump 2 by diversion mechanism 4, neither can influence normally carrying out of wellbore construction, can not increase the drillng operation risk yet.
The method of utilizing the pressure of the drill fluctuation to improve shaft bottom drilling fluid expulsion pressure is a kind of brand-new raising shaft bottom drilling fluid expulsion pressure method, through The field, deep hard formation rate of penetration improves 1～5 times than conventional drilling method, and the pressure of the drill that observes on rig floor situation that fluctuates widely is obviously improved.Practice shows that this method has promptly realized the increase of shaft bottom drilling fluid expulsion pressure, has reduced the fluctuation of shaft bottom the pressure of the drill effectively.
Claims (4)
1. method of utilizing the pressure of the drill fluctuation to improve shaft bottom drilling fluid expulsion pressure is characterized in that may further comprise the steps:
The power source that adopts is the power that the last the pressure of the drill fluctuation that produces of drill string body (12) provides, the interior drilling fluid of mud pit (1) enters drill string inner chamber (3) after providing power by slush pump (2), through diversion mechanism (4) shunting, most of drilling fluid is by normal pressure nozzle (5) ejection; Another fraction drilling fluid enters power converting unit through power converting unit inlet one-way valve (6), reach 80-100Mpa or higher pressure after obtaining power source and reducing energy that the pressure of the drill fluctuating range obtains, discharge through power converting unit outlet one way valve (7), realize the direct or auxiliary rock of superhigh pressure water jet by superhigh pressure water jet nozzle (8) ejection.
2. the method for utilizing the pressure of the drill fluctuation to improve shaft bottom drilling fluid expulsion pressure according to claim 1, it is characterized in that: described power converting unit comprises that power transforms cavity (9), the pressure of the drill transmits bar (10), flexible member (11), drill string body (12), lubricating fluid body cavity (13), the raising of drilling fluid expulsion pressure is finished in power conversion cavity (9), when the pressure of the drill on the drill string body (12) increases, the pressure of the drill transmits drilling fluid and the flexible member (11) in bar (10) the compression power transfer chamber (9), the increase of the interior drilling liquid pressure of power conversion cavity (9) makes power converting unit inlet one-way valve (6) close, power converting unit outlet one way valve (7) is opened, the drilling fluid that obtains the power source energy exports one way valve (7) through power converting unit and discharges, and realizes the direct or auxiliary rock of superhigh pressure water jet by superhigh pressure water jet nozzle (8) ejection.
3. the method for utilizing the pressure of the drill fluctuation to improve shaft bottom drilling fluid expulsion pressure according to claim 2, it is characterized in that: described flexible member (11) bears the pressure that the pressure of the drill transmits bar (10), produce compression and accumulation of energy, the lubricating fluid on flexible member this moment (11) is pressed into lubricating fluid body cavity (13); When the pressure of the drill on the drill string body (12) reduces, bear the pressure that the pressure of the drill transmits bar (10), the flexible member (11) of generation compress energy storage stretches and releases energy, and makes power conversion cavity (9) internal pressure reduce; Power converting unit inlet one-way valve (6) is opened, power converting unit outlet one way valve (7) is closed, power conversion cavity (9) flows into drilling fluid, and the lubricating fluid in the lubricating fluid body cavity (13) flows back to flexible member (11) simultaneously, the lubricated and cooling for flexible member (11).
4. the method for utilizing the pressure of the drill fluctuation to improve shaft bottom drilling fluid expulsion pressure according to claim 1 is characterized in that: two parts drilling fluid of described flow dividing structure (4) shunting along two independently runner flow to the shaft bottom, do not produce interference each other; After power converting unit lost efficacy, provide the drilling fluid that enters drill string inner chamber (3) behind the power directly to enter into normal pressure nozzle (5) by slush pump (2) and spray by diversion mechanism (4).
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110101056.2A CN102182411B (en) | 2011-04-21 | 2011-04-21 | Method for increasing injection pressure of shaft bottom drilling fluid by use of bit pressure fluctuation |
| PCT/CN2012/072450 WO2012142891A1 (en) | 2011-04-21 | 2012-03-16 | Method and system for improving drilling speed by using drill string vibration |
| RU2013127769/03A RU2550628C2 (en) | 2011-04-21 | 2012-03-16 | Method and system for drilling acceleration by use of drill string vibration |
| EP12774000.9A EP2623707B1 (en) | 2011-04-21 | 2012-03-16 | Method and system for improving drilling speed by using drill string vibration |
| US13/882,982 US9540881B2 (en) | 2011-04-21 | 2012-03-16 | Method and system for improving drilling speed by using drill speed vibration |
| CA2816465A CA2816465C (en) | 2011-04-21 | 2012-03-16 | Method and system for improving drilling speed by using drill string vibration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110101056.2A CN102182411B (en) | 2011-04-21 | 2011-04-21 | Method for increasing injection pressure of shaft bottom drilling fluid by use of bit pressure fluctuation |
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| CN102182411A true CN102182411A (en) | 2011-09-14 |
| CN102182411B CN102182411B (en) | 2015-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110101056.2A Active CN102182411B (en) | 2011-04-21 | 2011-04-21 | Method for increasing injection pressure of shaft bottom drilling fluid by use of bit pressure fluctuation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012142891A1 (en) * | 2011-04-21 | 2012-10-26 | 中国石油大学(华东) | Method and system for improving drilling speed by using drill string vibration |
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| US4662459A (en) * | 1985-03-08 | 1987-05-05 | Bodine Albert G | Drilling system and method employing torsional sonic vibration for lubrication of journal type bit bearings |
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| 刘永旺: "井下减振增压装置设计研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012142891A1 (en) * | 2011-04-21 | 2012-10-26 | 中国石油大学(华东) | Method and system for improving drilling speed by using drill string vibration |
| RU2550628C2 (en) * | 2011-04-21 | 2015-05-10 | Чайна Юниверсити Оф Петролиум (Ист Чайна) | Method and system for drilling acceleration by use of drill string vibration |
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| CN102182411B (en) | 2015-02-18 |
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