CN102182411B - 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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- CN102182411B CN102182411B CN201110101056.2A CN201110101056A CN102182411B CN 102182411 B CN102182411 B CN 102182411B CN 201110101056 A CN201110101056 A CN 201110101056A CN 102182411 B CN102182411 B CN 102182411B
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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 utilizing Fluctuation of weight on bit to improve shaft bottom drilling fluid expulsion pressure.
Two, background technology:
The major advantage that down-hole installation special tool improves shaft bottom drilling fluid expulsion pressure method is under need not changing existing drilling technology and appointed condition, can reach high-pressure spray directly or the object of auxiliary rock.But how improving the expulsion pressure of shaft bottom drilling fluid, is 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 is all from the entrained pressure energy of drilling fluid itself, implementation procedure be by special tool by the energy trasfer of most of drilling fluid to sub-fraction drilling fluid.The method implementation procedure and application process face a following difficult problem: the special tool structure 1. designed according to the method is comparatively complicated, make its life-span in underground work and safety be difficult to ensure; 2. along with the increase of well depth, cyclic pressure dissipation increases, and drilling well pressure energy reduces, and the effect improving shaft bottom drilling fluid expulsion pressure can be affected; 3. the intrinsic vibration improving impact that shaft bottom drilling fluid expulsion pressure process causes and drill string may produce coupling phenomenon, affects drill bit and drilling tool working life; 4. can produce a constant pressure drop when special tool designed according to the method normally works, add the service load of the circulating system, also may affect the performance of some normal functions of drilling fluid; 5. all drilling fluid all participates in energy transfer process, if instrument lost efficacy in down-hole, circulation of drilling fluid can be caused to be obstructed, construct and cannot carry out, even produce serious consequence.Therefore, although researcher has carried out painstaking efforts and research with great concentration, the method for above-mentioned raising shaft bottom drilling fluid expulsion pressure has been applied not yet.
Three, summary of the invention:
Object of the present invention is exactly in view of the foregoing defects the prior art has, a kind of method utilizing Fluctuation of weight on bit to improve shaft bottom drilling fluid expulsion pressure is provided, the power source of the expulsion pressure method of this kind of raising shaft bottom drilling fluid is the Bottom Hole Bit Weight In A fluctuation in drilling process, utilizes the energy reducing the acquisition of Fluctuation of weight on bit amplitude to improve shaft bottom drilling fluid expulsion pressure.Accomplish both to reduce the adverse effect that Fluctuation of weight on bit produces drilling process, ensure that construction safety carries out, improve shaft bottom drilling fluid expulsion pressure again.
Its technical scheme comprises the following steps: the power that the power source of employing provides for the Fluctuation of weight on bit that drill string body produces, implementation process is: in mud pit, drilling fluid enters drill string inner chamber after providing power by slush pump, shunt through diversion mechanism, major part drilling fluid is sprayed by normal pressure nozzle, play the function of conventional drilling liquid, this part drilling fluid circulate not by the interference improving 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, obtain power source and reach the pressure of 80-100Mpa or higher after reducing the energy that Fluctuation of weight on bit amplitude obtains, discharge through power converting unit Outlet check valves, realize superhigh pressure water jet directly or auxiliary rock by the ejection of superhigh pressure water jet nozzle; Wherein, flow dividing structure shunting two parts drilling fluid along two independently runner flow to shaft bottom, do not produce interference each other; The effect of power converting unit balances excessive Fluctuation of weight on bit, the energy trasfer reducing the acquisition of Fluctuation of weight on bit amplitude improved drilling fluid to drilling fluid and sprays pressure energy.
Above-mentioned power converting unit comprises power-conversion cavity, load transfer bar, flexible member, drill string body, lubricating fluid body cavity, the raising of drilling fluid expulsion pressure completes in power conversion cavity, when the pressure of the drill on drill string body increases, drilling fluid in load transfer bar compression power transfer chamber and flexible member, in power conversion cavity, the increase of drilling liquid pressure makes power converting unit inlet one-way valve close, power converting unit Outlet check valves is opened, the drilling fluid obtaining power source energy is discharged through power converting unit Outlet check valves, superhigh pressure water jet is realized directly or auxiliary rock by the ejection of superhigh pressure water jet nozzle.
Above-mentioned flexible member bears the pressure of load transfer bar, and produce compression and accumulation of energy, the lubricating fluid now on flexible member is pressed into lubricating fluid body cavity; When the pressure of the drill on drill string body reduces, bear the pressure of load transfer bar, the flexible member producing compress energy storage stretches and releases energy, and power conversion cavity internal pressure is reduced; Power converting unit inlet one-way valve is opened, and power converting unit Outlet check valves is closed, and power conversion cavity flows into drilling fluid, and the endoceliac lubricating fluid of lubricating fluid flows back to flexible member simultaneously, is flexible member lubrication and cooling.
Two parts drilling fluid of above-mentioned flow dividing structure shunting along two independently runner flow to shaft bottom, do not produce interference each other; After power converting unit lost efficacy, the drilling fluid entering drill string inner chamber after providing power by slush pump can directly enter into the ejection of normal pressure nozzle by diversion mechanism.
The invention has the beneficial effects as follows: 1. utilize the method can reduce Bottom Hole Bit Weight In A fluctuating range, the harm brought to drilling tool and equipment thus reduction the pressure of the drill fluctuates widely, increases the safety of creeping into operation.2. will obtain the drilling fluid of power source energy, utilize the special runner of super-pressure drilling fluid and special nozzle ejection, and realize superhigh pressure water jet directly or auxiliary rock, can bit speed be improved, become and be harmful to as favourable.3. this utilizes Fluctuation of weight on bit 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 increase land equipment, do not affect normal circulation of drilling fluid and creep into operation.Even if power converting unit disabler, still can balance the pressure of the drill, circulating fluid, ensure normally carrying out of wellbore construction.4. the party's ratio juris is simple, and realizing the method does not need complicated instrument and structure, dislikes operating mode be slightly more prone to reach on-the-spot requirement tool life proposed in down-hole.5. Fluctuation of weight on bit is utilized to improve the fluctuation of the energy source-Bottom Hole Bit Weight In A of the method for shaft bottom drilling fluid expulsion pressure, this fluctuation can increase and can not reduce along with the increase of well depth and complicated of formation lithology, effectively overcome the problem that deep-well underground hydraulic pressure energy source weakens along with the increase of well depth, for the increase of deep-well, ultradeep well shaft bottom drilling fluid expulsion pressure provides energy safeguard.
Four, accompanying drawing illustrates:
Accompanying drawing 1 is fundamental diagram of the present invention.
Five, detailed description of the invention:
By reference to 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 check valves 7, superhigh pressure water jet nozzle 8, power-conversion cavity 9, load transfer 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 Fluctuation of weight on bit that drill string body 12 produces, implementation process is: in mud pit 1, drilling fluid enters drill string inner chamber 3 after providing power by slush pump 2, shunt through diversion mechanism 4, major part drilling fluid is sprayed by normal pressure nozzle 5, play the function of conventional drilling liquid, this part drilling fluid circulate not by the interference improving 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 6,80-100Mpa or higher pressure is reached after obtaining the energy of power source-reduction Fluctuation of weight on bit amplitude acquisition, discharge through power converting unit Outlet check valves 7, realize superhigh pressure water jet directly or auxiliary rock by superhigh pressure water jet nozzle 8 ejection.The raising of drilling fluid expulsion pressure completes in power conversion cavity 9, when the pressure of the drill on drill string body 12 increases, drilling fluid in load transfer bar 10 compression power transfer chamber 9 and flexible member 11, in power conversion cavity 9, the increase of drilling liquid pressure makes power converting unit inlet one-way valve 6 close, power converting unit Outlet check valves 7 is opened, the drilling fluid obtaining power source energy is discharged through power converting unit Outlet check valves 7, realizes superhigh pressure water jet directly or auxiliary rock by superhigh pressure water jet nozzle 8 ejection; Flexible member 11 bears the pressure of load transfer bar 10, and produce compression, accumulation of energy, the lubricating fluid now on flexible member 11 is pressed into lubricating fluid body cavity 13.When the pressure of the drill on drill string body 12 reduces, bear the pressure of load transfer bar 10, the flexible member 11 producing compress energy storage stretches and releases energy, and pressure in power conversion cavity 9 is reduced.Power converting unit inlet one-way valve 6 is opened, and power converting unit Outlet check valves 7 is closed, and power conversion cavity 9 flows into drilling fluid, and the lubricating fluid simultaneously in lubricating fluid body cavity 13 flows back to flexible member 11, lubricates and lower the temperature for flexible member 11.
Flow dividing structure 4 shunt two parts drilling fluid along two independently runner flow to shaft bottom, do not produce interference each other.After power converting unit lost efficacy, the drilling fluid entering drill string inner chamber 3 after providing power by slush pump 2 can directly enter into normal pressure nozzle 5 by diversion mechanism 4 and spray, and both can not affect normally carrying out of wellbore construction, also can not increase drillng operation risk.
The method utilizing Fluctuation of weight on bit to improve shaft bottom drilling fluid expulsion pressure is a kind of raising shaft bottom drilling fluid expulsion pressure method completely newly, apply through scene, deep hard formation rate of penetration improves 1 ~ 5 times than conventional drilling method, and the pressure of the drill that rig floor observes situation that fluctuates widely obviously is improved.Practice shows, namely the method achieves the increase of shaft bottom drilling fluid expulsion pressure, efficiently reduces the fluctuation of Bottom Hole Bit Weight In A.
Claims (1)
1. the method utilizing Fluctuation of weight on bit to improve shaft bottom drilling fluid expulsion pressure, it is characterized in that comprising the following steps: the power source of employing is the power that the upper Fluctuation of weight on bit produced of drill string body (12) provides, mud pit (1) interior drilling fluid 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, this part drilling fluid circulate not by the interference improving 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 power source and reach the pressure of 80-100Mpa or higher after reducing the energy that Fluctuation of weight on bit amplitude obtains, discharge through power converting unit Outlet check valves (7), realize superhigh pressure water jet directly or auxiliary rock by superhigh pressure water jet nozzle (8) ejection, described power converting unit comprises power-conversion cavity (9), load transfer bar (10), flexible member (11), drill string body (12), lubricating fluid body cavity (13), the raising of drilling fluid expulsion pressure completes in power conversion cavity (9), when the pressure of the drill on drill string body (12) increases, drilling fluid in load transfer bar (10) compression power transfer chamber (9) and flexible member (11), the increase of power conversion cavity (9) interior drilling liquid pressure makes power converting unit inlet one-way valve (6) close, power converting unit Outlet check valves (7) is opened, the drilling fluid obtaining power source energy is discharged through power converting unit Outlet check valves (7), superhigh pressure water jet is realized directly or auxiliary rock by superhigh pressure water jet nozzle (8) ejection, the effect of power converting unit balances excessive Fluctuation of weight on bit, the energy trasfer reducing the acquisition of Fluctuation of weight on bit amplitude is improved drilling fluid to drilling fluid and sprays pressure energy, described flexible member (11) bears the pressure of load transfer bar (10), and produce compression and accumulation of energy, the lubricating fluid now on flexible member (11) is pressed into lubricating fluid body cavity (13), when the pressure of the drill on drill string body (12) reduces, bear the pressure of load transfer bar (10), the flexible member (11) producing compress energy storage stretches and releases energy, and the interior pressure of power conversion cavity (9) is reduced, power converting unit inlet one-way valve (6) is opened, power converting unit Outlet check valves (7) is closed, power conversion cavity (9) flows into drilling fluid, lubricating fluid simultaneously in lubricating fluid body cavity (13) flows back to flexible member (11), is flexible member (11) lubrication and cooling, two parts drilling fluid of shunting of described flow dividing structure (4) along two independently runner flow to shaft bottom, do not produce interference each other, after power converting unit lost efficacy, the drilling fluid entering drill string inner chamber (3) after providing power by slush pump (2) can pass through diversion mechanism (4) and directly enter into normal pressure nozzle (5) ejection.
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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| Publication Number | Publication Date |
|---|---|
| CN102182411A CN102182411A (en) | 2011-09-14 |
| CN102182411B true CN102182411B (en) | 2015-02-18 |
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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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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9540881B2 (en) * | 2011-04-21 | 2017-01-10 | China University Of Petroleum (East China) | Method and system for improving drilling speed by using drill speed 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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| CN2665342Y (en) * | 2003-10-30 | 2004-12-22 | 杨文魁 | Double flow passage drilling bit |
| CN2900761Y (en) * | 2006-02-17 | 2007-05-16 | 祝兆清 | Flexible pressurizing shock-reducing device for drill bit |
| CN101787858A (en) * | 2010-03-04 | 2010-07-28 | 中国石油大学(华东) | Underground drill stem vibration damping and pressurizing device |
| CN201627541U (en) * | 2010-03-04 | 2010-11-10 | 中国石油大学(华东) | Underground drill string vibration reducing and pressurizing device |
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2011
- 2011-04-21 CN CN201110101056.2A patent/CN102182411B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN2507988Y (en) * | 2001-02-28 | 2002-08-28 | 胜利石油管理局黄河钻井总公司钻前公司 | Borehole booster for petroleum drilling |
| CN2665342Y (en) * | 2003-10-30 | 2004-12-22 | 杨文魁 | Double flow passage drilling bit |
| CN2900761Y (en) * | 2006-02-17 | 2007-05-16 | 祝兆清 | Flexible pressurizing shock-reducing device for drill bit |
| CN101787858A (en) * | 2010-03-04 | 2010-07-28 | 中国石油大学(华东) | Underground drill stem vibration damping and pressurizing device |
| CN201627541U (en) * | 2010-03-04 | 2010-11-10 | 中国石油大学(华东) | Underground drill string vibration reducing and pressurizing device |
Non-Patent Citations (1)
| Title |
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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》.2008,(第3期),47-49. * |
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