CN104632110A - Continuous circulation drilling technology suitable for gas-liquid two-phase flow drilling - Google Patents

Continuous circulation drilling technology suitable for gas-liquid two-phase flow drilling Download PDF

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CN104632110A
CN104632110A CN 201310564712 CN201310564712A CN104632110A CN 104632110 A CN104632110 A CN 104632110A CN 201310564712 CN201310564712 CN 201310564712 CN 201310564712 A CN201310564712 A CN 201310564712A CN 104632110 A CN104632110 A CN 104632110A
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gas
drilling
liquid
circulation
phase
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CN 201310564712
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Chinese (zh)
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CN104632110B (en )
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许期聪
邓虎
肖洲
周长虹
董仕明
余锐
廖兵
曾绍清
黄述春
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中国石油集团川庆钻探工程有限公司
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    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B21/00Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/14Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor using liquids and gases, e.g. foams

Abstract

The invention discloses a continuous circulation drilling technology suitable for gas-liquid two-phase flow drilling. The technology comprises a gas injection unit, a safe pressure relief mechanism, a gas-liquid mixing device and a gate valve control system; and the gas injection unit, the safe pressure relief mechanism, the gas-liquid mixing device and the gate valve control system are connected in sequence in operation. Then, a main circulation channel leaded out from the gate valve control system is connected into a vertical pipe, a collateral circulation channel with a pressure gauge is connected to a drill stand for future use, and a pressure relief channel is connected to a circulation tank. In normal drilling operation, a gas phase and a liquid phase are evenly mixed through the gas-liquid mixing device to enter the gate valve control system for circulating through a main circulation channel; and in single connection or round trip, a gas-liquid two-phase flow enters a drill for circulating through the gate valve control system by the collateral circulation channel. The technology solves such problems as great underground pressure fluctuation, low drilling efficiency and blockage of drilling due to fall back of chips caused by stop of single connection and round trip circulation in the large effluent stratum gas-liquid two-phase flow drilling process, and largely improves the gas drilling efficiency and safety.

Description

一种适用于气液两相流钻井的连续循环钻井工艺 Suitable for two-phase flow continuous circulation of drilling drilling technology

技术领域 FIELD

[0001] 本发明涉及一种适用于气液两相流钻井的连续循环钻井工艺,用于钻井施工作业,属于石油天然气钻井工艺技术领域。 [0001] The present invention relates to a process for continuously circulating drilling suitable for two-phase flow of drilling for drilling operations, belonging to the field of oil and gas drilling technology.

背景技术 Background technique

[0002] 近年来,国内气基流体钻井技术正以其独特的优势迅猛发展,应用进尺、井次逐年提高,在提高机械钻速、治理井漏、发现和保护油气层方面发挥了重要作用。 [0002] In recent years, domestic gas-based drilling fluid technology is the rapid development of its unique advantages, application footage, wells to improve year by year, it played an important role in improving ROP, lost circulation control, discovery and reservoir protection aspects. 但总体应用看,地层出水是限制气基流体钻井技术应用的瓶颈,除川渝及新疆部分地区外,其它地区并没有大面积推广应用。 But the overall look applications, limiting formation water based fluid drilling technology bottleneck gas, except for some areas Chongqing and Xinjiang, and not elsewhere in large scale.

[0003] 具有气液两相流型的雾化、泡沫、充气钻井技术在应对地层出水方面取得了较大进步,改变了前期气基流体钻井“见水就跑”的被动局面,应用进尺比例逐步提高,但仍存在如下问题: "See Water run" [0003] with two-phase flow type spray, a foam, a pneumatic drilling technology has made great progress in terms of effluent to deal with the formation, the pre-changed based fluid gas drilling passive situation, the application proportion footage gradually improved, but there are still the following questions:

一、大出水地层接立柱后由于井底积液,压力波动大,压力先升高后再波动下降,重新稳定前钻速较慢,严重影响了气体钻井效率及地面安全。 A large water column due to the formation followed by liquid loading, pressure fluctuations, pressure fluctuations increased first and then decreased, before re-stabilize the penetration rate is slow, seriously affecting the efficiency of gas drilling and ground safety.

[0004] 二、出水后井壁稳定性较差的地层,停止循环接单根,局部轻微掉块及未带出井筒的大颗粒岩屑回落堆积,存在较大井下风险。 [0004] Second, the formation water poor borehole stability, then a single cycle is stopped, and the non-local block out light with a big particles down the wellbore cuttings accumulation downhole there is a big risk.

[0005] 三、大出水地层接立柱后井底压力波动大,井下流体当量密度不稳定,其对钻柱产生的浮力相应不稳定,从而导致井底钻压波动较大。 [0005] Third, the large water column followed by the formation downhole pressure fluctuations, the downhole fluid density equivalent unstable, its buoyancy generated by the drill string corresponding instability resulting downhole WOB fluctuations.

[0006] 四、充气钻井接单根后,压力波动大,液面不稳定,不易判断井下是否发生溢流,存在安全隐患。 [0006] Fourth, then aerated drilling a single, large pressure fluctuations, level of instability, not easy to determine whether or not an overflow occurs downhole, there are security risks. 另外,复杂井段的起钻过程中,往往需要供气保持循环才能上提钻具,一旦停止注气,则不能上提钻具,且存在较大卡钻风险。 Further, the process is complicated tripping interval, the gas retention often need to put the tool on the circulation, the gas injection is stopped once, the tool can not be put on, and there is a big risk of sticking.

[0007] 因此,急需一种能保持气液两相流钻井不间断循环的工艺技术。 [0007] Thus, the need for a two-phase flow to maintain continuous circulation of drilling technology.

[0008] 中国专利201210561390.0,公开了一种适用于空气钻井的连续循环钻井工艺,该工艺先连接增压机至供气控制装置的供气管路,再分两路连接至连续循环短接,能实现空气钻井情况下的连续循环,但该工艺中缺乏气液混合工艺,其密封部件也只能密封纯空气,不能实现雾化、泡沫、充气等气液两相流钻井情况下的连续循环钻井。 [0008] Chinese patent 201210561390.0 discloses a method suitable for continuous circulation of air drilling drilling process, which connect to a gas booster control means supply line, and then connected to two routes short successive cycles, can continuous air circulation in the case of drilling, but the process lacks the gas-liquid mixing process, the sealing member can seal the continuous circulation only pure air, the atomization is not achieved, a foam, gas-liquid two inflatable drilling situation a drilling .

[0009] 中国专利2011101301394,公开了一种石油钻井用不间断连续循环短接及其连续循环泥浆方法,该连续循环短接包括短接本体、自动中心阀和侧向常闭单流阀。 [0009] Chinese Patent No. 2011101301394, discloses an oil drilling short and uninterrupted continuous loop continuous loop slurry process which comprises a continuous loop shorting short body, a central valve and automatic single normally closed valve side. 该短接密封部件只能密封液相,不能密封气相及气液混合相,不能承受气压,所以该短节仅适用于泥浆钻井,不能适用于气液两相流钻井中,且该短接未有泄压阀,不能在其他阀门失效的情况下泄出钻杆内圈闭的压力,存在安全隐患。 The sealing member can seal the shorting liquid, not gas-liquid mixed phase and a gas sealing can not withstand the pressure, it applies only to the short section of the drilling mud can not be applied to drilling liquid two phase flow, and which is not shorted pressure relief valve, the valve can not be discharged in the case of failure of the other traps pressure within the drill pipe, there are security risks.

发明内容 SUMMARY

[0010] 本发明的目的在于克服现有技术存在的上述问题,提供一种适用于雾化钻井、泡沫钻井、充气钻井等气液两相流钻井的连续循环钻井工艺。 [0010] The object of the present invention is to overcome the above problems of the prior art, to provide a continuous circulation drilling process for drilling to a suitable mist drilling, foam drilling, drilling and other inflatable gas-liquid flow. 本发明可以在雾化、泡沫、充气等气液两相流钻井接单根、起下钻过程中保持气相、液相均不间断循环,从而避免井底积液引起的井壁跨塌,降低卡钻风险,提闻钻井效率。 The present invention may take a single atomization drilling, foam, inflatable gas-liquid two-phase flow from the drilling process to maintain the gas phase and liquid are continuous circulation, thereby avoiding cross wall collapse caused by liquid loading, reduced sticking risk, improve drilling efficiency smell.

[0011] 为实现上述目的,本发明采用的技术方案如下: [0011] To achieve the above object, the present invention employs the following technical solutions:

一种适用于气液两相流钻井的连续循环钻井工艺,其特征在于:包括地面设备的连接工艺、接立柱或单根工艺和起钻工艺; Suitable for continuous circulation of drilling process drilling liquid two phase flow, characterized by: a ground connection process equipment, connected to a single column or from drilling process and technology;

所述地面设备的连接工艺为:地面设备包括注气单元、安全泄压机构、气液混合装置、闸阀控制系统,作业时依次连接注气单元、安全泄压机构、气液混合装置和闸阀控制系统;闸阀控制系统通过主循环通道接入立管,通过侧循环通道接到钻台备用,通过泄压通道接至循环罐; The ground connecting apparatus for the process: gas injection means comprises a ground equipment, safety relief mechanism, a gas-liquid mixing means, a control valve system, in turn connected to gas injection units job, safety relief mechanism, the control valve and gas-liquid mixing means system; valve control system access through the main circulation passage standpipe, through the side circulation passage to a drill standby, connected to the circulation tank through the overflow channel;

所述接立柱或单根工艺如下: The contact post or single process is as follows:

a、下钻到底后,在最后一根钻杆顶部接入第一个循环导向短节,主循环通道连通,气液两相流通过主循环通道、立管进入钻具循环,开始正常气液两相流钻井,备用立柱或单根顶部接入下一个循环导向短节; a, the drill in the end, at the end of a top rod guide access cycle a first short section, the main circulation passage communicating the main liquid two-phase flow through the circulation passage, into the riser drilling cycle, start a normal liquid drilling two-phase flow, or a single spare column top entry loop guide a short section;

b、钻完立柱或单根后,上提钻具坐卡瓦或吊卡,将侧循环通道与第一个循环导向短节的侧阀相连,闸阀控制系统控制侧循环通道开启,气液两相流通过侧循环通道进入钻具循环;侧循环压力正常后,闸阀控制系统控制主循环通道关闭,泄压通道开启,释放立管压力; B, after single or drilled posts, lifting the drill slips or elevator ride, attached to the side of the first valve-side circulating passage a short section of the loop guide, the gate valve control system controls the circulation passage side opening, gas-liquid two phase flow into the drill string circulates through the circulation passage side; rear side circulation pressure is normal, the control system controls a main valve closed circulation path, the pressure relief channel opening, standpipe pressure is released;

C、立管压力为零后,从第一个循环导向短节顶部卸扣,然后接入备用立柱或单根; C, will standpipe pressure is zero, from the top of the short section of a guide shackle loop, then a single access or spare column;

d、闸阀控制系统控制主循环通道开启,气液两相流通过主循环通道进入钻具循环,闸阀控制系统控制侧循环通道关闭,泄压通道开启,释放侧循环通道压力;侧循环管线压力为零后,卸开侧阀与侧循环通道的连接,取卡瓦或吊卡,恢复钻进; d, the control system controls a main valve passage open loop, two-phase flow into the drill string through the main loop circulation passage, valve control system controls the circulation channel side closed, the pressure relief channel opening, the pressure release side circulating passage; pressure side circulation line after zero, breaking the connection side of the valve to the circulation passage side, take slips or elevator, drilling recovery;

e、重复上述步骤,实现气液两相流钻井的连续循环; E, repeating the above steps, to achieve continuous circulation of drilling liquid two phase flow;

所述起钻工艺如下: The tripping process is as follows:

a、上提立柱或单根至下连续循环阀出转盘面,坐吊卡或卡瓦,将侧循环通道与第一个循环导向短节的侧阀相连; a, put on a single column or to turn out a continuous recirculation valve disk sitting or elevator slips, the side connected to the first valve-side circulating passage with a short section of the guide loop;

b、闸阀控制系统控制侧循环通道开启,气液两相流通过测循环通道进入钻具循环,侧循环通道压力正常后,闸阀控制系统控制主循环通道关闭,泄压通道开启,释放立管压力; B, control system controls the valve opening-side circulation path, two-phase flow into the drill string circulates through the circulation passage measured after the circulation passage side pressure is normal, the control system controls a main valve closed circulation path, the pressure relief channel opening, standpipe pressure release ;

C、立管压力为零后,卸扣、起出立柱或单根,再将顶驱或方钻杆与井口连续循环阀相接; C, will standpipe pressure is zero, shackles, or from a single column, then the top drive or kelly valve continuously circulated in contact with the wellhead;

d、闸阀控制系统控制主循环通道开启,侧循环通道关闭,泄压通道开启,释放侧循环通道压力; d, the control system controls a main valve passage open loop, closed side circulation path, the pressure relief channel opening, pressure release-side circulating passage;

e、侧循环通道压力为零时,卸开侧阀与侧循环通道的连接,取吊卡或卡瓦,继续起钻。 When E, the circulation channel side pressure is zero, breaking the connection side of the valve to the circulation passage side, take the elevator or slip, continue tripping.

[0012] 所述气液混合装置包括用于进气的内筒和用于进液的外筒,气液混合装置上设置有与内筒连通的注气接口、与外筒连通的注液接口和与外筒连通的气液混合接口,内筒壁上贯通设置有通孔,内筒通过通孔与外筒相通,注液接口通过管线连接至泥浆泵,通过泥浆泵连接到循环罐,注气接口通过管线连接至安全泄压机构,气液混合接口连接至闸阀控制系统。 [0012] The gas-liquid mixing means comprises an inner cylinder and an intake air inlet of the outer tube, an interface is provided with a gas injection tube communicates with the inner liquid mixing means, the outer cylindrical injection communication interface and the outer cylinder in communication with the gas-liquid mixing interfaces, through the wall of the inner cylinder is provided with a through hole communicating the inner cylinder and the outer cylinder through the through hole, the injection through line interface to the mud, mud pump connected to the circulation tank through injection an interface connected to the air through line safety relief mechanism, gas-liquid mixture is connected to the interface valve control system.

[0013] 所述闸阀控制系统设置在立管与气液混合装置之间,包括主循环通道闸门、侧循环通道闸门和泄压闸门,主循环通道闸门连接到主循环通道,侧循环通道闸门连接到侧循环通道,泄压闸门连接到泄压通道。 [0013] The valve control system is disposed between the riser and the gas-liquid mixing means, a circulation passage includes a main gate, the gate-side circulating passage and the relief valve, the main circulating passage connected to the primary circulation passage gate, the gate-side circulating passage connected circulating passage to the side, the gate is connected to the pressure relief overflow channel.

[0014] 所述侧循环通道上安装有用于监测侧循环通道内的压力情况的压力监测表。 [0014] The table is mounted for monitoring pressure monitoring the pressure conditions inside the upper side of the circulation passage circulating passage.

[0015] 所述循环导向短节上设置有主阀、侧阀和泄压阀,主阀设置在短节本体内,泄压阀设置在主阀上方短节本体的侧壁上,侧阀设置在主阀下方短节本体的侧壁上。 [0015] The loop guide is provided with a short section on the top of the main valve on the side wall of a short section of the body, the main valve side valve is provided, and the relief valve side valve, the main valve body is provided in a short section, the pressure relief valve is provided on the sidewalls of the main valve body below the nipple.

[0016] 所述主阀设置在短节本体中心位置,且与短节本体同轴。 [0016] The main valve body is provided at the center position of the short section and is coaxial with the short section of the body.

[0017] 所述泄压阀通径小于侧阀通径。 [0017] is smaller than the diameter of the pressure relief valve side valve diameter.

[0018] 采用本发明的优点在于: [0018] The advantages of the present invention:

一、本发明能在气液两相流钻井过程中接单根、起下钻作业保持不间断循环,减小了井底压力的波动,减少了由于中断循环而需要重新恢复井底压力所需要的时间,使井底一直处于需要的欠平衡状态,能有效提高出水地层钻井效率;同时,出水后井壁稳定性较差的地层,停止循环接单根,局部轻微掉块及未带出井筒的大颗粒岩屑回落堆积,带来卡钻风险,该连续循环工艺将使井筒保持不间断循环,避免了岩屑回落堆积导致卡钻的风险。 First, the present invention can be connected to a single two-phase flow in the drilling process, from the drilling operations to maintain continuous circulation, reduce the bottomhole pressure fluctuation is reduced due to the interruption cycle is required to restore the bottomhole pressure needed time, has been in the bottom hole underbalanced condition required, can improve the drilling efficiency of formation water; at the same time, the water after the formation of poor borehole stability, then a single cycle is stopped, and the non-local block out slightly out of the wellbore the accumulation of large particles of debris fell, bringing the risk of sticking, the wellbore continuous cycle process will maintain an ongoing cycle, to avoid the accumulation of debris down the risk of sticking.

[0019] 二、本发明在泄压机构和闸阀控制系统之间设有气液混合装置,该装置设有内筒和外筒,内同进气,外筒进液,气相可以在外筒内均匀混合到液相中,可以保证进入闸阀控制系统的气相和液相混合均匀,减少井筒内段塞流的发生,增加了该工艺技术的可靠性及安全性。 [0019] Second, the present invention between the relief valve mechanism and the control system is provided with a gas-liquid mixing means is provided with inner and outer cylinders, with the intake air inlet of the outer cylinder, the outer cylinder can be uniformly vapor mixing into the liquid phase, the control system can ensure that the gate valve into the gas and liquid mixing, within the wellbore to reduce the occurrence of slug flow, increases the reliability and safety of the process technology.

[0020] 三、本发明在注气单元和气液混合装置之间设置有安全泄压机构,可以在出现异常情况时(比如憋压、误操作、井下复杂等)快速切断注入闸阀控制系统的气体,通过旁通阀、泄压阀泄压,保证了设备和人员的安全。 [0020] Third, the present invention between the gas injection unit and the liquid mixing device is provided with a safety pressure relief mechanism may be (for example hold pressure, misuse, downhole and the like) when an abnormality occurs in the quick disconnect valve control system for a gas injection , through the bypass valve, pressure relief valve pressure relief, to ensure the safety of equipment and personnel.

[0021] 四、本发明中采用的循环导向短节包括短节本体、主阀、侧阀和泄压阀,泄压阀设置在主阀上方短节本体的侧壁上,当主阀和侧阀失效不能正常打开时,压缩气体将会在两个循环阀之间形成圈闭压力,通过泄压阀可以安全的泄出钻杆内圈闭的压力,使后续作业能安全进行。 [0021] Fourth, the present invention is employed in the circulating nipple comprises a short section of the guide body, the main valve, and the relief valve side valve, pressure relief valve is provided on the side wall of the main body above the valve short section, when the main valve and the valve side when failure does not normally open, the compressed gas pressure will be trapped between two valves cycles can be safely trapped within the drill pipe pressure escape through the relief valve, so that safe for a subsequent job.

[0022] 五、本发明采用的循环导向短节中,所述泄压阀通径小于侧阀通径,采用此结构,泄出钻杆内圈闭的压力可靠性更高。 Fifth, the present invention employs the circular guide short section [0022], the pressure relief valve diameter is smaller than the diameter side of the valve, With this configuration, releasing the pressure within the drill pipe traps higher reliability.

[0023] 传统的连续循环短接和工艺要么只适用于泥浆钻井,要么只适用于空气钻井,本发明适用于雾化、泡沫、充气等气液两相流钻井工艺的连续循环。 [0023] The conventional short successive cycles and apply only to the process or the drilling mud or drilling only applicable to air for atomization, foam, gas-liquid two inflatable continuous circulation of drilling process of the present invention.

附图说明 BRIEF DESCRIPTION

[0024] 图1为本发明的设备连接结构示意图 [0024] Fig 1 a schematic view of the connection structure of the device of the present invention.

图2为本发明中采用的循环导向短节结构示意图 2 of the present invention, the structure of a short section of the guide loop employed in a schematic view of FIG.

图中标记为:1、注气单元,2、安全泄压机构,3、气液混合装置,4、闸阀控制系统,5、循环导向短节,6、侧循环通道,7、短节本体,8、泄压阀,9、主阀,10、侧阀,11、主循环通道,12、泄压通道,13、泥浆泵,14、循环罐。 FIG labeled: 1, the gas injection unit 2, a safety relief mechanism 3, a gas-liquid mixing means 4, control valve 5, a short section of the guide loop, 6, side circulating passage 7, a short section of the body, 8, a relief valve 9, the main valve 10, the valve side, 11, of the main circulation passage 12, the overflow channel 13, mud pump 14, the circulation tank.

具体实施方式 detailed description

[0025] 实施例1 [0025] Example 1

一种适用于气液两相流钻井的连续循环钻井工艺,包括地面设备的连接工艺、接立柱或单根工艺和起钻工艺,这些工艺组成连续循环钻井工艺,可以不按时间先后顺序实施。 Suitable for continuous circulation of drilling liquid two phase flow drilling process, the process comprising a ground connection device, or connected to a single column process and the tripping process, the composition of these processes continuously circulating drilling technology, embodiments may not chronologically.

[0026] 所述地面设备的连接工艺为:地面设备包括注气单元1、安全泄压机构2、气液混合装置3、闸阀控制系统4,作业时依次连接注气单元1、安全泄压机构2、气液混合装置3和闸阀控制系统4 ;闸阀控制系统4通过主循环通道11接入立管,通过侧循环通道6接到钻台备用,通过泄压通道12接至循环罐14 ; [0026] The equipment is connected to process ground: ground equipment comprises a gas injection unit, a safety relief mechanism 2, 3, 4 valve control system, when the job 1 are sequentially connected to gas injection units, the safety relief mechanism liquid mixing device 2, the gas-liquid mixing device 3 and the control valve 4; valve control system 4 through the main circulation passage 11 standpipe access, through the side circulation path to a drill spare 6, through the overflow channel 12 connected to the circulation tank 14;

所述接立柱或单根工艺如下: The contact post or single process is as follows:

a、下钻到底后,在最后一根钻杆顶部接入第一个循环导向短节,主循环通道连通,气液两相流通过主循环通道、立管进入钻具循环,开始正常气液两相流钻井,备用立柱或单根顶部接入下一个循环导向短节; a, the drill in the end, at the end of a top rod guide access cycle a first short section, the main circulation passage communicating the main liquid two-phase flow through the circulation passage, into the riser drilling cycle, start a normal liquid drilling two-phase flow, or a single spare column top entry loop guide a short section;

b、钻完立柱或单根后,上提钻具坐卡瓦或吊卡,将侧循环通道与第一个循环导向短节的侧阀相连,闸阀控制系统控制侧循环通道开启,气液两相流通过侧循环通道进入钻具循环;侧循环压力正常后,闸阀控制系统控制主循环通道关闭,泄压通道开启,释放立管压力; B, after single or drilled posts, lifting the drill slips or elevator ride, attached to the side of the first valve-side circulating passage a short section of the loop guide, the gate valve control system controls the circulation passage side opening, gas-liquid two phase flow into the drill string circulates through the circulation passage side; rear side circulation pressure is normal, the control system controls a main valve closed circulation path, the pressure relief channel opening, standpipe pressure is released;

C、立管压力为零后,从第一个循环导向短节顶部卸扣,然后接入备用立柱或单根; C, will standpipe pressure is zero, from the top of the short section of a guide shackle loop, then a single access or spare column;

d、闸阀控制系统控制主循环通道开启,气液两相流通过主循环通道进入钻具循环,闸阀控制系统控制侧循环通道关闭,泄压通道开启,释放侧循环通道压力;侧循环管线压力为零后,卸开侧阀与侧循环通道的连接,取卡瓦或吊卡,恢复钻进; d, the control system controls a main valve passage open loop, two-phase flow into the drill string through the main loop circulation passage, valve control system controls the circulation channel side closed, the pressure relief channel opening, the pressure release side circulating passage; pressure side circulation line after zero, breaking the connection side of the valve to the circulation passage side, take slips or elevator, drilling recovery;

e、重复上述步骤,实现气液两相流钻井的连续循环; E, repeating the above steps, to achieve continuous circulation of drilling liquid two phase flow;

所述起钻工艺如下: The tripping process is as follows:

a、上提立柱或单根至下连续循环阀出转盘面,坐吊卡或卡瓦,将侧循环通道与第一个循环导向短节的侧阀相连; a, put on a single column or to turn out a continuous recirculation valve disk sitting or elevator slips, the side connected to the first valve-side circulating passage with a short section of the guide loop;

b、闸阀控制系统控制侧循环通道开启,气液两相流通过测循环通道进入钻具循环,侧循环通道压力正常后,闸阀控制系统控制主循环通道关闭,泄压通道开启,释放立管压力; B, control system controls the valve opening-side circulation path, two-phase flow into the drill string circulates through the circulation passage measured after the circulation passage side pressure is normal, the control system controls a main valve closed circulation path, the pressure relief channel opening, standpipe pressure release ;

C、立管压力为零后,卸扣、起出立柱或单根,再将顶驱或方钻杆与井口连续循环阀相接; C, will standpipe pressure is zero, shackles, or from a single column, then the top drive or kelly valve continuously circulated in contact with the wellhead;

d、闸阀控制系统控制主循环通道开启,侧循环通道关闭,泄压通道开启,释放侧循环通道压力; d, the control system controls a main valve passage open loop, closed side circulation path, the pressure relief channel opening, pressure release-side circulating passage;

e、侧循环通道压力为零时,卸开侧阀与侧循环通道的连接,取吊卡或卡瓦,继续起钻。 When E, the circulation channel side pressure is zero, breaking the connection side of the valve to the circulation passage side, take the elevator or slip, continue tripping.

[0027] 上述工艺中,接立柱或单根工艺和起钻工艺需要根据步骤,按照时间先后顺序实施。 [0027] In the above process, bonding process and a single column or from drilling process requires the steps, in the order of execution time.

[0028] 本实施例中,所述气液混合装置3包括用于进气的内筒和用于进液的外筒,气液混合装置上设置有与内筒连通的注气接口、与外筒连通的注液接口和与外筒连通的气液混合接口,内筒壁上贯通设置有通孔,内筒通过通孔与外筒相通,注液接口通过管线连接至泥浆泵13,通过泥浆泵13连接到循环罐14,注气接口通过管线连接至安全泄压机构2,气液混合接口连接至闸阀控制系统4。 [0028] In this embodiment, the gas-liquid mixing device 3 comprises an inner cylinder and an intake air inlet of the outer cylinder, the liquid mixing device is provided with a gas injection tube within the communication interface, with the outer communication interfaces injection cylinder and the outer cylinder in communication with the gas-liquid mixing of the interface, the inner cylinder wall is provided with a through hole penetrating the inner cylinder and the outer cylinder in communication via the through hole, the injection interface through line 13 to a mud pump, through the mud pump 13 is connected to the circulation tank 14, gas injection safety relief mechanism coupled to the interface through line 2, a gas-liquid mixing valve control system connected to the interface 4.

[0029] 本实施例中,所述闸阀控制系统4设置在立管与气液混合装置3之间,包括主循环通道闸门、侧循环通道闸门和泄压闸门,主循环通道闸门连接到主循环通道11,侧循环通道闸门连接到侧循环通道6,泄压闸门连接到泄压通道12。 [0029] In this embodiment, the valve 4 is provided between the control system and the standpipe liquid mixing device 3, the circulation passage comprising a main gate, the gate-side circulating passage and the relief valve, the main loop is connected to the main loop path shutter channel 11, is connected to the gate side of the circulation channel side circulating passage 6, pressure relief valve 12 connected to the overflow channel.

[0030] 本实施例中,所述侧循环通道6上安装有用于监测侧循环通道内的压力情况的压力监测表。 [0030] In this embodiment, the circulation channel side pressure monitoring table is mounted for monitoring pressure conditions in the circulation passage 6 side.

[0031] 本实施例中,所述循环导向短节5上设置有主阀9、侧阀10和泄压阀8,主阀9设置在短节本体7内,泄压阀8设置在主阀9上方短节本体7的侧壁上,侧阀10设置在主阀9下方短节本体7的侧壁上。 [0031] In this embodiment, the circulation in a short section of the guide body 7, the main relief valve 8 is provided with a valve 9, valve 10 and the relief side valve 8, the main valve 9 is provided on a short section 5 is provided in the main valve 9 on the sidewalls of the upper nipple body 7, a valve 10 is provided on the side of the side walls 9 below the main valve body 7 subs.

[0032] 本实施例中,所述主阀9设置在短节本体7中心位置,且与短节本体7同轴。 [0032] In this embodiment, the main valve 9 is provided at the center position of a short section of the body 7, and is coaxial with the short section of the body 7.

[0033] 本实施例中,所述泄压阀8通径小于侧阀10通径。 [0033] In this embodiment, the relief valve 8 is smaller than the diameter side of the valve bore 10.

[0034] 实施例2 [0034] Example 2

一种适用于气液两相流钻井的连续循环钻井工艺,包括: Suitable for continuous circulation of drilling process drilling liquid two phase flow, comprising:

地面设备的连接工艺如下:地面设备包括注气单元、安全泄压机构、气液混合装置、闸阀控制系统,作业时依次连接注气单元,安全泄压机构,气液混合装置,闸阀系统。 Process equipment connected to ground as follows: ground equipment comprises a gas injection unit, a safety relief mechanism, a gas-liquid mixing means, a control valve system, in turn connected to gas injection units job, safety relief mechanism, a gas-liquid mixing device, the gate valve system. 然后将闸阀控制系统接出的主循环通道接入立管、带压力表的侧循环通道接到钻台备用,泄压通道接至循环罐。 The valve control system is then connected to a main circulating path access risers, with pressure gauge side circulating passage to a drill standby, the pressure relief passage connected to the circulation tank.

[0035] 接立柱(单根)工艺如下: [0035] The contact posts (single) process is as follows:

a、下钻到底后在最后一根钻杆顶部接入第一个循环导向短节,主循环通道连通,气液两相流通过主循环通道进入立管进入钻具循环,开始正常气液两相流钻井,备用立柱(单根)顶部接入下一个循环导向短节; a, the drill guide in the end of the last cycle a short section of drill pipe access to the top, the main circulation passage communicating two-phase flow into the standpipe enters the drill string through the main loop circulation passage, a gas-liquid two normal start drilling phase flow, the standby uprights (single) access to the top of a short section of the guide loop;

b、钻完立柱(单根)后,上提钻具坐卡瓦或吊卡,缓慢卸下第一个循环导向短节的侧出口侧阀盖板,将侧循环通道与侧阀相连,系保险绳;打开闸阀控制系统侧循环控制闸门,建立侧循环通道,气液两相流通过测循环通道进入钻具循环。 B, the drilled column (single), the lifting drill slips or elevator ride, slowly remove the first circular guide short side outlet side of the valve plate section, the side circulating passage connected to the side valve system safety rope; valve open loop control system controlling the gate side, establishing circulation passage side, two-phase flow into the drill string circulates through the circulation passage measured. 侧循环压力正常后,关闭闸阀控制系统主循环控制闸门,打开泄压闸门,通过泄压通道释放立管压力; After the pressure side of the circulation normal, closed loop control system the main control valve shutter, the shutter opening relief, standpipe pressure is released through the relief passage;

C、立管压力为零后,从循环导向短节顶部卸扣,然后接入备用立柱(单根); C, will standpipe pressure is zero, from the top of a short section of the guide shackle loop, and then access the spare column (single);

d、通过闸阀控制系统打开主循环通道闸门,建立主循环通道,气液两相流通过主循环通道进入钻具循环;关闭闸阀控制系统侧循环控制闸门,打开泄压闸门,释放侧循环通道压力;侧循环管线压力为零后,解保险绳,卸开侧阀与侧循环通道的连接,上紧侧阀盖板;取卡瓦或吊卡,恢复钻进; d, the gate valve is opened by the shutter control system of the main circulation passage, establishing the main loop path, two-phase flow into the drill string through the main loop circulation passage; side gate valve is closed loop control system for controlling the shutter, the shutter opens the pressure relief, pressure release-side circulating passage ; rear side circulation line zero pressure safety rope solution, breaking the connection side of the valve to the circulation passage side, the tightening side of the valve cover; take slips or elevator, drilling recovery;

e、重复上述步骤,实现气液两相流钻井的连续循环。 E, repeating the above steps, to achieve continuous circulation of drilling liquid two phase flow.

[0036] 起钻工艺如下: [0036] The tripping process is as follows:

a、上提立柱(单根)至下连续循环阀出转盘面,坐吊卡或卡瓦; a, the lifting column (single) to turn out a continuous recirculation valve disk, or the slips sit elevators;

b、缓慢卸下第一个循环导向短节的侧出口侧阀盖板,将侧循环通道与侧阀相连,系保险绳; B, slowly remove the first circular guide short side outlet side of the valve plate section, the side circulating passage connected to the side valve system safety cable;

C、打开闸阀控制系统侧循环控制闸门,建立侧循环通道,气液两相流通过测循环通道进入钻具循环;侧循环压力正常后,关闭闸阀控制系统主循环控制闸门,打开泄压闸门,通过泄压通道释放立管压力; C, the gate valve open loop control system controlling the gate side, establishing circulation passage side, two-phase flow into the drill string circulates through the circulation passage measured; rear side circulation pressure is normal, the main control valve closed loop control of the shutter, the shutter opening relief, by releasing standpipe pressure relief passage;

d、立压为零后,卸扣、起出立柱(单根); d, the vertical pressure is zero, shackles, from an upright (single);

e、顶驱(方钻杆)与井口连续循环阀相接; e, the top drive (Kelly) in contact with the continuous loop wellhead valve;

f、打开闸阀控制系统主循环控制闸门,建立主循环通道,关闭闸阀控制系统侧循环控制闸门,打开泄压闸门,释放侧循环通道压力; F, the gate valve shutter control main loop control system, the establishment of the main loop path, the gate valve closed loop control system controlling the gate side, the shutter is opened the pressure relief, pressure release-side circulating passage;

g、侧循环通道压力为零,解保险绳,卸开侧阀与侧循环通道的连接,上紧侧阀盖板;取吊卡或卡瓦,继续起钻。 g, zero pressure side circulation path, insurance rope solution, breaking the connection side of the valve to the circulation passage side, the tightening side of the valve cover; or take the elevator slips, continue tripping.

[0037] 本实施例中,所述注气单元包括:空气压缩机,增压机,制氮设备等,连接在安全泄压机构之前,为钻井作业提供气源。 [0037] In this embodiment, the gas injection unit comprises: an air compressor, turbocharger, nitrogen and other equipment connected before the safety relief mechanism is provided for the air drilling operations. 注气单元可以采用现有技术中的注气单元。 Gas injection unit may be employed in the prior art gas injection unit.

[0038] 本实施例中,所述安全泄压机构包括:旁通阀,截止阀,泄压阀,连接在注气单元与气液混合装置之间,可以在出现异常情况时(比如憋压、误操作、井下复杂等)快速切断注入闸阀控制系统的气体,通过旁通阀、泄压阀泄压,保证了设备和人员的安全。 [0038] In this embodiment, the safety relief mechanism comprising: a bypass valve, stop valve, pressure relief valve connected between the gas-liquid mixing unit and a gas injection means in the abnormal situation can be (such as pressure - , misuse, downhole etc.) quickly cut off the gas injection valve control system, through the bypass valve, pressure relief valve pressure relief, to ensure the safety of equipment and personnel. 安全泄压机构可以采用现有技术。 Safety relief agencies can use existing technology.

[0039] 本实施例中,所述气液混合装置包括:注气接口,注液接口,气液混合接口,注液接口采用高压软管或硬管连接至泥浆泵,注气接口采用高压软管或硬管连接至安全泄压机构,气液混合接口连接至闸阀控制系统。 [0039] In this embodiment, the gas-liquid mixing device comprising: a gas injection port, the injection port, a gas-liquid mixing interfaces, interface with high-pressure injection hose or tube is connected to the mud pumps, high-pressure gas injection interface with soft the tube or pipe is connected to safety relief mechanism connected to the gas-liquid mixing valve control system interfaces. 该装置可以使气相、液相均匀混合,减少或避免井下段塞流的发生,降低了钻井作业的风险,提升了气液两相流钻井作业的安全性。 The apparatus may be gas phase, liquid phase were uniformly mixed, reduce or avoid slugging downhole segment, reduces the risk of drilling operations, to enhance the security of the two-phase flow of the drilling operation.

[0040] 本实施例中,所述闸阀控制系统包括主循环通道闸门、侧循环通道闸门、泄压闸门,连接在立管与气液混合装置之间,控制循环通道的切换。 [0040] In this embodiment, the valve control system comprises a main loop path shutter, shutter side circulation path, the pressure relief valve, a riser is connected between the gas-liquid mixing means, controls the switching of the circulation passage.

[0041] 本实施例中,其侧循环通道上安装有压力监测表,可以监测侧循环通道内的压力情况,保障操作人员的安全。 [0041] In this embodiment, mounted on a side table monitoring circulating passage pressure can be monitored in the case where the pressure side of the cycle path to ensure the safety of operating personnel.

[0042] 本实施例中,其闸阀控制系统上设置了一条通往循环罐的泄压通道,防止泄压时压力伤人,增加了安全性。 [0042] In this embodiment, the overflow channel is provided on a path to which the circulation tank control valve, the pressure relief prevent wounding, increases security.

[0043] 实施例3 [0043] Example 3

本实施例对本发明中采用的循环导向短节进行说明。 This embodiment of the present invention, a short section of the guide loop employed will be described.

[0044] 循环导向短节包括:主阀、侧阀、泄压阀,主阀设置在短节本体内,侧阀设置在主阀下方短节本体的侧壁上用于接入循环管线。 [0044] Short circulation guide section comprising: a main valve side valve, relief valve, the main valve body section is provided in the short side valve is provided for circulating the access line on the sidewall of the main valve body below the nipple. 泄压阀设置在主阀上方短节本体的侧壁上,且主阀位于侧阀和泄压阀之间的短节本体内。 Pressure relief valve is provided on the side wall of the main body above the valve short section, the short section and the main valve is located between the side of the valve body and the pressure relief valve. 所述主阀设置在短节本体中心位置,且与短节本体同轴。 The main valve body is provided at the center position of the short section and is coaxial with the short section of the body. 所述泄压阀通径小于侧阀通径。 The pressure relief valve diameter side is smaller than the valve diameter. 循环导向短节在钻进时连接在钻杆之间随钻具入井。 Circular guide short section connected between the drill pipe into the well with the drill during drilling.

[0045] 气体钻井或气液混合相钻井过程中,将循环导向短节接入单根中,正常钻进时气体或气液混合相通过短节本体中心和主阀循环,接单根或立柱时,在侧阀上接入侧循环管线,通过侧阀建立侧循环通道,主阀自动关闭,卸开循环导向短节之上的扣接入单根,单根接好后,开启主循环通道,主阀打开建立循环,侧阀关闭,接单根完成。 [0045] The gas-liquid mixed phase or gas drilling during drilling, circulating a short section of the guide in a single access, during normal drilling the gas-liquid mixed phase or through a short section center of the body and the main valve cycle, then a single column or when, on the access side of the valve side circulation line, side by side circulating passage establishing valve, the main valve closes automatically, breaking deduction on a single access cycle of a short section of the guide, the single connected, open the main circulation passage , the main valve is opened to establish circulation, side valve is closed, then a single complete.

[0046] 当主阀和侧阀失效不能正常打开时,压缩气体将会在两个循环阀之间形成圈闭压力,通过安全泄压阀可以安全的泄出钻杆内圈闭的压力,使后续作业能安全进行。 [0046] When the main valve and the normally open side valve does not fail, the compressed gas pressure will be trapped between two valves cycles can be safely trapped within the drill pipe pressure by escape through the safety relief valve, so that the subsequent job security can be.

[0047] 实施例4 [0047] Example 4

一种适用于气液两相流钻井的连续循环钻井工艺,地面设备的连接工艺如下:地面设备包括注气单元、安全泄压机构、气液混合装置、闸阀控制系统,作业时依次连接注气单元,安全泄压机构,气液混合装置,闸阀系统。 Joining process continuous circulation of drilling technology, ground equipment suitable for use in gas-liquid two drilling follows: gas injection means comprises a ground equipment, safety relief mechanism, a gas-liquid mixing means, a control valve system, in turn connected to gas injection operation when unit, safety relief mechanism, a gas-liquid mixing device, the gate valve system. 然后将闸阀控制系统接出的主循环通道接入立管、带压力表的侧循环通道接到钻台备用,泄压通道接至循环罐。 The valve control system is then connected to a main circulating path access risers, with pressure gauge side circulating passage to a drill standby, the pressure relief passage connected to the circulation tank. 本发明还包括气体钻井作业前,将注气单元、安全泄压机构、气液混合装置、闸阀控制系统依次连接,然后将主循环通道接入立管,侧循环通道接到钻台备用。 The present invention further comprises drilling the gas before the gas injection unit, a safety relief mechanism, a gas-liquid mixing means, a control valve system is connected in turn, and then the main loop path access riser, a drill-side circulating passage to spare.

[0048] 实施例5 [0048] Example 5

四川某构造Y井采用1.07g/cm3的钻井液钻进至井深673.0Om (雷口坡组),发生井漏,其中嘉五地层井漏失返。 Sichuan using a drilling well configuration Y 1.07g / cm3 to a depth of penetration 673.0Om (Leikoupo), lost circulation occurs, wherein the formation Ka five wells back leakage. 现场决定采用气液两相流连续循环钻井提速治漏。 The scene decided to use two-phase flow continuous circulation drilling speed governing leakage. 按地面流程安装好注气单元、安全泄压机构、气液混合装置、闸阀控制系统、主循环通道、侧循环通道、泄压通过。 Installation process according to good surface gas injection unit, a safety relief mechanism, a gas-liquid mixing means, a control valve system, the main circulation passage, the circulation passage side, through the pressure relief. 下钻到底后,安装循环导向短节,备用单根上接好下一个循环导向短节。 After the drill in the end, a short section of the guide loop installation, connect the standby single short section of guide next cycle. 试验开始,注气单元提供注气量60m3/min,泥浆泵提供注液量45L/s,钻进时立压7.0MPa。 Start of the test, providing insufflation gas injection unit 60m3 / min, injection amount to provide mud 45L / s, pressure of 7.0MPa while drilling vertical. 钻完单根后,上提钻具坐吊卡,卸开循环导向短节上的侧阀盖板,连接侧循环通道,栓好保险链,通过闸阀控制系统开启侧循环通道闸门,观察侧循环通道上的压力表,压力稳定后关闭主循环通道闸门,通过泄压通道卸掉立管压力,从循环导向短节上面卸扣,接备用单根。 After drilling a single, lifting the elevator ride drill, breaking the loop on the side of the valve guide plate short section of the connection side circulation passage, good safety chain stopper, through the open gate valve side circulating passage control system, circulation observation side pressure gauge on the channel, the pressure is stable main circulating path shutter closed, through the overflow channel standpipe pressure relieved from the loop above the guide shackle short section, then a single backup. 接好单根后开启主循环通道闸门,压力稳定后关闭侧循环通道闸门,通过泄压通道泄压,观察侧循环压力表,压力回零后卸侧循环通过,恢复钻进。 Connected after a single turn primary loop channel gating, off after pressure stabilization side circulating passage gate, through the relief passage relief observed side circulation pressure gauge, the pressure back to zero after the discharge side through the circulation, recovery drilling. 气液两相流连续循环钻井试验井段910.21〜927.15m,接单根过程中,系统运行平稳,接单根前后最高压力波动0.3MPa,液面变化0.4m3(常规充气钻井页面波动20m3左右),顺利实现了气液两相流(充气)钻井接单根作业中井下连续循环,确保了环空当量密度稳定,有效的解决了气液两相流(充气)钻井接单根后压力波动大的问题,可避免由于环空当量密度变化造成的井漏,较为准确判断井下溢流情况,提高气液两相流钻井安全性。 Two-phase flow continuous circulation of drilling test wells section 910.21~927.15m, then a single process, the system running smoothly, then a single maximum longitudinal 0.3MPa pressure fluctuations, changes in the level 0.4m3 (page conventional pneumatic drilling fluctuations around 20m3) , to achieve a smooth gas-liquid flow (pneumatic) connected to a single operation of drilling underground continuous cycle, to ensure that the equivalent density annulus stable, effective solution to the gas-liquid two-phase flow (pneumatic) connected to a single drilling pressure fluctuation the problem can be avoided since the effective wellbore annulus leakage caused by density variation, more accurate downhole overflow situation is determined, increase drilling safety of two-phase flow. 此外,充气钻井从接单根、开泵到重新建立正常循环的时间大约为15min (井深900m左右),且随着井深增加,时间会大幅增加,采用气液两相流连续循环钻井技术则可实现“无缝”连接,提高充气钻井效率。 Further, re-establishment of normal aerated drilling connection from a single cycle, a pump to the time of about 15min (about 900m depth), and as the depth increases, the time increase significantly, the continuous two-phase gas-liquid circulation drilling technique can be to achieve "seamless" connections, pneumatic improve drilling efficiency.

Claims (7)

  1. 1.一种适用于气液两相流钻井的连续循环钻井工艺,其特征在于:包括地面设备的连接工艺、接立柱或单根工艺和起钻工艺; 所述地面设备的连接工艺为:地面设备包括注气单元(I)、安全泄压机构(2)、气液混合装置(3)、闸阀控制系统(4),作业时依次连接注气单元(I)、安全泄压机构(2)、气液混合装置(3)和闸阀控制系统(4);闸阀控制系统(4)通过主循环通道(11)接入立管,通过侧循环通道(6)接到钻台备用,通过泄压通道(12)接至循环罐(14); 所述接立柱或单根工艺如下: a、下钻到底后,在最后一根钻杆顶部接入第一个循环导向短节,主循环通道连通,气液两相流通过主循环通道、立管进入钻具循环,开始正常气液两相流钻井,备用立柱或单根顶部接入下一个循环导向短节; b、钻完立柱或单根后,上提钻具坐卡瓦或吊卡,将侧循环通道与第一个循环导向短节的侧阀 CLAIMS 1. A process for continuous circulation drilling drilling liquid two phase flow, characterized by: a ground connection process equipment, connected to a single column or from drilling process and technology; the equipment is connected to process ground: Ground apparatus comprising a gas injection unit (the I), a safety relief mechanism (2), gas-liquid mixing means (3), the control valve system (4), in turn connected to the insufflation unit when the job (the I), a safety relief mechanism (2) gas-liquid mixing means (3) and a control valve (4); a control valve system (4) through the main circulation passage (11) access to the riser, to a drill through the standby-side circulating passage (6), by relief channel (12) connected to the circulation tank (14); bonding said single or column process is as follows: a, the drill in the end, the first short section of a guide loop, the main loop at the end of a passage communicating the top of the drill pipe access the gas-liquid two-phase flow through the main circulation passage, into the riser drilling cycle, two-phase flow under normal drilling starts, the spare column or the top of a single access cycle of a short guide section; B, drilled or single column after lifting the drill slips or elevator ride, the valve side circulation path side and a first short section of the guide loop 相连,闸阀控制系统控制侧循环通道开启,气液两相流通过侧循环通道进入钻具循环;侧循环压力正常后,闸阀控制系统控制主循环通道关闭,泄压通道开启,释放立管压力; C、立管压力为零后,从第一个循环导向短节顶部卸扣,然后接入备用立柱或单根; d、闸阀控制系统控制主循环通道开启,气液两相流通过主循环通道进入钻具循环,闸阀控制系统控制侧循环通道关闭,泄压通道开启,释放侧循环通道压力;侧循环管线压力为零后,卸开侧阀与侧循环通道的连接,取卡瓦或吊卡,恢复钻进; e、重复上述步骤,实现气液两相流钻井的连续循环; 所述起钻工艺如下: a、上提立柱或单根至下连续循环阀出转盘面,坐吊卡或卡瓦,将侧循环通道与第一个循环导向短节的侧阀相连; b、闸阀控制系统控制侧循环通道开启,气液两相流通过测循环通道进 Connected to valve control system controls the circulation channel side open, two-phase flow into the drill string through the side loop circulation passage; rear side circulation pressure is normal, the control system controls a main valve closed circulation path, the pressure relief channel opening, standpipe pressure is released; C, will standpipe pressure is zero, from the top of the short section of a guide shackle loop, then a single access or spare column; D, the control system controls a main valve passage open loop, two-phase flow through the main circulation passage into the drilling cycle, control system controls the valve closing-side circulation path, the pressure relief channel opening, the pressure release side circulating passage; rear side circulation line pressure is zero, breaking the connection side of the valve to the circulation passage side, take slips or elevator resume drilling; E, repeating the above steps, to achieve continuous circulation of drilling liquid two phase flow; the tripping process is as follows: a, put on a single column or to turn out a continuous recirculation valve disk, or sitting Elevators slips connected to the valve side circulation path side and the first short section of the guide loop; B, control system controls the valve opening-side circulation path, by measuring two-phase flow into the circulation passage 钻具循环,侧循环通道压力正常后,闸阀控制系统控制主循环通道关闭,泄压通道开启,释放立管压力; C、立管压力为零后,卸扣、起出立柱或单根,再将顶驱或方钻杆与井口连续循环阀相接; d、闸阀控制系统控制主循环通道开启,侧循环通道关闭,泄压通道开启,释放侧循环通道压力; e、侧循环通道压力为零时,卸开侧阀与侧循环通道的连接,取吊卡或卡瓦,继续起钻。 Drilling cycle, the circulation channel side pressure is normal, the control system controls a main valve closed circulation path, the pressure relief channel opening, standpipe pressure is released; after C, standpipe pressure is zero, shackles, or from a single column, then the top drive or kelly valve continuously circulated in contact with the wellhead; D, the control system controls a main valve passage open loop, closed side circulation path, the pressure relief channel opening, the pressure release side circulating passage; E, the circulation channel side pressure is zero when breaking the connection side of the valve to the circulation passage side, take the elevator or slip, continue tripping.
  2. 2.根据权利要求1所述的一种适用于气液两相流钻井的连续循环钻井工艺,其特征在于:所述气液混合装置(3)包括用于进气的内筒和用于进液的外筒,气液混合装置(3)上设置有与内筒连通的注气接口、与外筒连通的注液接口和与外筒连通的气液混合接口,内筒壁上贯通设置有通孔,内筒通过通孔与外筒相通,注液接口通过管线连接至泥浆泵(13),通过泥浆泵(13)连接到循环罐(14),注气接口通过管线连接至安全泄压机构(2),气液混合接口连接至闸阀控制系统(4 )。 The one of the continuous circulation of a drilling process is suitable for two-phase flow of drilling claim, wherein: the gas-liquid mixing means (3) comprises an inner tube for intake air and for feeding an outer cylinder, liquid-liquid mixing device (3) is provided with a gas injection on the interface with the inner cylinder communicating with the injection interfaces and the outer cylinder in communication with the gas-liquid mixing communication interfaces outer cylinder, the inner cylinder wall is provided with a through a through hole, the through hole through the inner tube and the outer tube in communication, through the injection line to the mud pump interface (13), connected to the circulation tank (14) through a mud pump (13), the interface is connected to the gas injection through the safety pressure relief line means (2), the interface is connected to the gas-liquid mixing valve control system (4).
  3. 3.根据权利要求1或2所述的一种适用于气液两相流钻井的连续循环钻井工艺,其特征在于:所述闸阀控制系统(4)设置在立管与气液混合装置(3)之间,包括主循环通道闸门、侧循环通道闸门和泄压闸门,主循环通道闸门连接到主循环通道(11),侧循环通道闸门连接到侧循环通道(6),泄压闸门连接到泄压通道(12)。 3. According to one of claim 1 or claim 2 for continuous circulation drilling process drilling liquid two phase flow, characterized in that: said valve control system (4) is provided with a riser gas-liquid mixing means (3 between), the circulation passage comprising a main gate, the gate-side circulating passage and the relief valve, the main circulating passage connected to the primary circulation passage shutter (11), connected to the gate side circulating passage side circulating passage (6), connected to the pressure relief valve overflow channel (12).
  4. 4.根据权利要求1或2所述的一种适用于气液两相流钻井的连续循环钻井工艺,其特征在于:所述侧循环通道(6)上安装有用于监测侧循环通道(6)内的压力情况的压力监测表。 The continuous circulation of drilling technology suitable for use in gas-liquid two drilling claim 1 or claim 2, wherein: the side is mounted for monitoring the circulation channel (6) on the side of the circulation passage (6) pressure monitoring gauge pressure conditions within.
  5. 5.根据权利要求1或2所述的一种适用于气液两相流钻井的连续循环钻井工艺,其特征在于:所述循环导向短节(5 )上设置有主阀(9 )、侧阀(10 )和泄压阀(8 ),主阀(9 )设置在短节本体(7 )内,泄压阀(8 )设置在主阀(9 )上方短节本体(7 )的侧壁上,侧阀(10 )设置在主阀(9)下方短节本体(7)的侧壁上。 5 according to one of claim 1 or claim 2 for continuous circulation drilling process drilling liquid two phase flow, characterized in that: said circular guide short section (5) is provided on the main valve (9), side a valve (10) and the relief valve (8), a main valve (9) provided in the short section of the body (7), the pressure relief valve (8) is provided in a side wall (9) over a short section of the main valve body (7) on the side of the valve (10) is provided on the side wall of the main valve (9) below a short section of the body (7).
  6. 6.根据权利要求5所述的一种适用于气液两相流钻井的连续循环钻井工艺,其特征在于:所述主阀(9)设置在短节本体(7)中心位置,且与短节本体(7)同轴。 6. According to one of the 5 continuous circulation drilling process is suitable for two-phase flow of drilling claim, wherein: said main valve (9) arranged in a short section of the body (7) the center position, and the short the body section (7) coaxially.
  7. 7.根据权利要求5或6所述的一种适用于气液两相流钻井的连续循环钻井工艺,其特征在于:所述泄压阀(8)通径小于侧阀(10)通径。 7. According to one 5 or claim 6 suitable for continuously circulating drilling process drilling liquid two phase flow, characterized in that: said pressure relief valve (8) is smaller than the diameter side of the valve (10) diameter.
CN 201310564712 2013-11-14 2013-11-14 Suitable for two-phase flow continuous circulation of drilling drilling technology CN104632110B (en)

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