CN1046956A - 人工操作的孔口封堵工具与油井注水泥方法 - Google Patents
人工操作的孔口封堵工具与油井注水泥方法 Download PDFInfo
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Abstract
一种井下分级注水泥设备,用以依次排送流态水泥到封裹井孔套管的两个地层层位中去。所述设备包括一个初级水泥排放孔口,以及一个或多个次级或侧向水泥排放孔口(27)。设备中装有可以操纵的一组套环(29);可以调节套环,在注水泥作业完成之后封堵次级侧向孔口。一件套环促动器(56)同所述注水泥设备协同工作,可加以远控以封堵侧向水泥排放孔口(27),确保注水泥作业完成之后在注水泥设备和井孔之间无连通现象。
Description
在此所披露的方法和设备一般说来涉及分级注水泥作业,尤其关系到向烃类生产井套管周围的、沿铅直方向间隔开来的各个地层层位发送或注入高压流态水泥的手段。此设备包括一件水泥发送器,也称作分级接箍,其中有一个套管,其一端带有适配接头以便依靠钻杆柱与加压水泥源连通。注入的水泥将在套管***构成一连续的壳层。
发送器或分级接箍包括一段套管,套管的中央腔室或通道在下端带有一个开孔,用以在第一级注水泥作业期间把流态水泥排放到地层的第一层位中去。在套管管壁上作出的一个或多个次级或侧向开孔在第二级注水泥作业期间把水泥输送到地层的第二级层位中去。
在所设想的这种类型的分级接箍之中,由流态水泥的向下液流携入套管的一只栓塞或封堵件将同套管下端的环形台座接合,从而中止向下的水泥液流,结束第一级流注。由此产生的背压将促动一液流控制件,打开次级排放孔口,使水泥液流通过这些孔口转向。
在初期注水泥作业之后,配装在套管中央腔室中的可操作的一组多段套环从后缩位置被推移到前推位置。在前推位置,此段套环的功能是,在第二级作业结束时封堵侧向水泥排放孔口,切断经过孔口的水泥液流。
分级接箍中液流控制套环的第一段具有一个环状台肩,将同由液流携带的一只孔道栓塞密封接合,从而在第一级作业期间阻碍水泥液流的进一步流通。液流控制套环的第二段包括一个第二环状密封台肩,同第二个顶塞接合以切断水泥液流。
在由于顶塞动作不妥,或者由于其他原因,水泥液流控制套环无法运用以控制水泥液流的情况下,已知的手段是强制性地调整或推移该段套环到封堵位置。在任何情况下,都必需以某种方式促动液流控制套环,确保套筒侧向排放开孔对水泥液流是封堵起来的。
本发明的目的之一是,提供一种改进的人工操作的井筒注水泥设备,能够加以远控,向一口井孔的间隔开来的各地层层位依次注入流态水泥。
进一步的目的是,提供一种方法和工具,能够克服分放接箍或水泥发送器操作中的故障,促进水泥的正常注入,以及随后的井眼试压。
按照本发明,一件液流控制套环促动器同注水泥分级接箍协同工作,随着下落一路旋转,钻穿套管中所包含的沉积水泥。促动器向下行进时,将首先切掉至少一部分套环上段密封台肩。随后促动器将同组合套环上段接合,把所述上段推向所需的推移或封堵位置。侧向水泥排放孔口被封堵将把套管内部腔室或中央通道同井孔隔离开来。
本发明的一个实施例将借助实例並参照附图加以说明,附图中:
图1是包围在水泥壳层中的一口油井的周围情况图景;
图2是沿图1中2-2线段所截取的剖面放大视图;
图3和图4是类似于图2的视图;
图5表明就位于分级套箍之中、体现本发明的一种促动工具;
图6是类似于图5的视图。
参照图1,具有通常所设想的形态的一口井眼10,形成于围绕着下套管井15的地层11之中。注水泥作业期间的一部水泥混拌设备12示于地面17。所述设备包括一台泵,能够借助导管23提供流态水泥的加压液流,向下送入油井以构成油井套管周围的封裹壳层。
井眼10的中心线最好是沿着大致上的铅直方向,尽管偏向地层某一角度並不会对本发明的运用构成某种损害。如图所示,井眼10通常形成于地层11之中,同好几个烃类生产层位相通。这种布局可用来最大限度地提高烃类产量。
本发明的图示中,有待注水泥的层位13处于预先定好位置的、***套管柱19之中的水泥发送器或分级接箍的下端。有待注水泥的上一层位16的定位使得在此两个注水泥层位之间可以形成一个具有一定重要性的中介空间或区域18。
井下水泥发送器或分级套箍14借助钻杆柱或套管柱19以及导管23同处于地面的混拌装置12连通。
参照图2,井下分级套箍或水泥发送器14(此后称作分级套箍)包括一根细长的套管21,通常由厚钢管制成。套管要构制成能够承受预期的操作高压以及从中泵送的水泥所具有的磨蚀作用。
套管或壳体21是由细长的、形成间隔腔室28的圆柱筒体构成的。所述套管段的上端带有接头,用以同套管接箍22构成可拆卸的连接。此接箍中的带螺纹的凹座同一段钻杆柱19或类似物体的端部接合,以便输送来自地面的流态水泥。
圆柱套管21的下端可以带有更多节套管,伸入井眼深达几千英尺。
套管21还配有沿周向布置的一个或多个侧向排放孔口27。这些孔口是贯穿套管21管壁的,连通中央腔室28。所述孔口27可以只有单独一个开孔贯穿套管管壁。最好具有许多这种开孔,围绕套管管壁等距离地间隔开来,沿某一特定方向或按某一特定方式排放水泥液流。
套管21封裹着一组复合的、由上段或第一段29和下段或第二段31组成的内部液流控制套环。套环上段29贴着套管21内壁形成滑动装配,可向纵向在腔室28内活动。套环下段31是同套环上段分离开的,具有环状台肩32,台肩的一侧形成第一个环形密封表面。
台肩32向内凸出朝向中央腔室28以形成一条受限的孔道。下段31做成向后延伸的尾部,同套环上段29上相邻边缘处的相应裙套36形成滑动配合。
在作业过程中,套环下段经过通道或腔室28可以在其初始位置-此时尾段34横过侧向排放孔口27构成封堵-和离开所述孔口27的另一推移位置之间沿纵向移动。
如图2所示,当复合套环下段31被推向下方位置时,侧向水泥排放孔口27将会打开,並连通腔室28而使一般流态水泥液流从中穿过。液流将进入地层,贴着套管外壁向下流动,逐渐构成壳状的包敷层9。
套环上段29由一段细长圆筒组成,带有向下延伸的初套36。此裙套,如图示,确定了一个圆筒状的环形空间37,套环下段31的尾段34可套配其中。套环上段29的上端带有向内凸出的台肩37a,形成了第二个环状密封台座,或接触表面38。在被推移之前,各个套环段是靠剪切销钉或可剪断的小螺钉67保持在适当位置的。
在强迫推移之前,套环上段29,如前所述,由剪切销钉或小型固除件保持就位。后者将靠液压剪断以释放套环上段29。
套环上段29可在图2所示的后缩位置和图4所申的前推位置之间移动。在前推位置,裙套36下落同尾段34接触,从而横过一个或多个侧向排放孔口以实现封堵。
在作业过程中,如图3所示,在从分级套箍14向下面地层层位13注入足够的、通常是预定的水泥容量之后,栓塞41被嵌入流态水泥液流之中。为此,栓塞41是经由钻杆柱19向下传送而进入中央通道28的。
栓塞41主要包括一只圆柱状栓体42,带有一个朝前渐缩的栓头43和位于后部的栓柄44。栓柄的直径适当,是以穿过套环上段29;栓柄並具有外部接触表面。触及台肩33时,栓柄44将继续下行,直至栓塞调准在分级套箍的下端之中。这样一来,由于环状台肩33同栓柄44相接触,套环下段31将向下推移,直至靠除钻杆柱的唇缘46。栓塞的底面同第一个环状台肩33的密封面32形成密封接合。
与此同时,套环下段31的移动将打开一个或多个侧向排放孔口27。前此曾经指出,这种移动会使流态水泥转向,被迫穿过孔口27进入邻近的地层层位16。
经过一段时间,预定数量的水泥已经取道次级排放孔口27沉积于地层16之内,常规的操作工序则是把一只封堵顶塞47嵌入流态水泥液流。在一项实施例中,顶塞47主要包括一个塞体48,带有许多顶塞凸缘49自塞体向外伸出。顶塞端头51包括一个渐缩的平截头圆锥表面52,同台肩37a的密封表面相适应。顶塞塞体48带有凸缘49,同水泥液流将紧贴而过的套管内表面接触。
顶塞47是通过钻杆柱19向下传送的,由作用于顶塞背面54上的水泥压力推动前行。所述封堵顶塞47进入套管21时,接触面52将同环状台肩38的相应表面相贴合。水泥液流的向下压力因而将迫使套环上段29从后缩位置转向前推位置。在前推位置上,裙套36将同套环下段31上的相应尾段34配准。
通常,在此工序位置上,分级注水泥作业结束,油井将具备条件从事试压。进行试压是为了确证在分级套箍的中央腔室28与所涉及的邻近地层之间不存在连通现象。
在某些情况下,顶塞47的上述封堵动作,即推移套环上段29达到其前推位置以横过水泥侧向排放孔口27,是不成功的。在这种情况下,一种补救工序是:推挤水泥,施加充分的压力在次级排放孔口27处形成封堵。
为避免出现侧向水泥孔口的封堵无法迅速实现的局面,目前配备一种促动器56,其尺寸使得可以通过钻杆柱19下放並进入分级接箍。这一器具的主要功能在于推动套环上段29,使之处于被驱动的、与套环下段31协同工作的位置。
如图5所示,促动器56由主体段57组成,其上端58与驱动轴59配装成可拆卸联接,驱动轴可以是钻杆柱、实心轴或者支撑钻杆柱的类似物。钻杆柱可进一步拼装这些构件作为扶正器58,使促动器主体同分级接箍14的进液开孔对中。需要时,所述钻杆柱也可包括一根或多根钻铤、伸缩钻杆、转向节以及类似物。
促动器主体57的下端配装着一个可拆离的切割器或铣刀61,带有凹入的下部切割端面62,以及沿周缘的切割表面63。驱动轴59的旋转使切割器61既可穿过腔室28中的水泥团块,也可穿过已就位栓塞41的塞柄44前行。切割器将切除环状台肩32的一部分,进一步扩大台肩的孔道,使促动器穿之而过。切割器的动作实际上将穿过腔室28中已硬结的水泥形成一个圆筒状的孔眼。
切割器61的外径大小恰使促动器56能够转动着下落;此外径足够细小,在切除已就位的上顶塞47並通过环状台肩37a时不会触动套环上段29。如所指出,后者不会移动到前推位置形成孔口的封堵。
在切割器61后面一定间距处的、促动器主体57的后段包括一段套带64。在所述套节上制成环状外表面71,同分级接箍的内表面滑动配合。套节部分64还配有贴合台肩或者环状台座66。于是,在推进促动器56穿过套管14的过程中,随着切割器61的向下行进,将依次铣掉上顶塞47和环状台肩37a靠里面的部分。转动着的钻杆柱再往下落就使切割器61切去塞柄44以及环状台肩32的里面一圈。
除去分级套箍内这些不然就会产生阻塞的部分将使促动器56能够穿过钻杆柱下部继续下落,直到套节64的贴合面或环状台座66同环状台肩37a的对应剩余部分相接触、相迭合。因而,套环上段29将被向下推动,与套环下段完全紧密接合,使裙套36配准在环套37之中,形成对许多侧面排放开孔27的可靠封堵。
可以理解,尽管在不偏离本发明的精神和范围的情况下,可以对本发明作出多种修改和变更,但只是应当加上附录的各项权利要求中所指出的一些限制。
Claims (6)
1、一种下套管井的注水泥方法,其中一种分级接箍构成油井套管的一个组成部分;所述分级接箍分别包括一个腔室、轴向进液口和初级排放孔口,用于通过所述腔室输送水泥液流;在所述进液口和初级排放孔口之间还设有一个次级排放孔口,在所述腔室中设有一只可以操作的套环,可以移动以横过所述次级水泥排放孔口形成封堵;此方法的特点是:
送入一个套环促动器到所述油井套管中去;
转动所述促动器以形成贯穿分级接箍腔室中已硬结水泥的液流通道;
使所述套环接触所述促动器,推移套环达到所述次级排放孔口以形成封堵。
2、一种用于下套管井注水泥作业的分级接箍,液态水泥通过此分级接箍输送,沉积在周围地层之中以形成油井套管水泥壳层,所述分级接箍包括:
一个限定细长腔室的壳体;
在所述细长腔室的相对两头形成水泥液流进出开孔的装置;
在所述套管中至少一个同所述细长腔室连通的次级排放孔口;
位于所述壳体中的一组可以操作的液流控制套环,用来调节通过所述水泥排放孔口的水泥液流,所述套环包括:
带有第一个内部环状台肩的套环第一段,在所述壳体出液开孔处形成初级水泥排放孔口;
带有第二个内部环状台肩的套环第二段,形成为导引所述水泥液流进入所述细长腔室所需的进液孔口,使用时要结合:
一具细长的促动器,可加以操纵以使相对于所述次级排放孔口确定所述套环第二级的位置,此促动器包括
为通过所述细长腔室两适当制配的主体,並包括:
所述主体下方的切割器,直径大小是以切掉至少一部分所述第二个环状台肩,
所述主体下方适当距离处向外突出的一个环状台座,同所述第二个内部台肩接合,借以促使套环第二段封堵所述次级排放孔口,以及
可以操纵的、把所述主体联接到转动支撑件上去的装置。
3、权利要求2中所确定的设备,其中所述支撑件由一刚性驱动轴组成。
4、权利要求3中所确定的设备,其中所述刚性驱动轴包括至少一件扶正器,位于该轴下方,接触所述套管内壁,从而使所述细长促动器同所述细长腔室沿轴向对中。
5、权利要求2或权利要求4中所确定的设备,其中所述刚性驱动轴包括使所述促动器穿过所述套管行进的装置。
6、权利要求2-5的任一项中所确定的设备,其中所述套环第一和第二段是可以操纵的,以便两者的相应部分迭合在一起。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US258,929 | 1988-10-17 | ||
US07/258,929 US4850432A (en) | 1988-10-17 | 1988-10-17 | Manual port closing tool for well cementing |
Publications (2)
Publication Number | Publication Date |
---|---|
CN1046956A true CN1046956A (zh) | 1990-11-14 |
CN1016203B CN1016203B (zh) | 1992-04-08 |
Family
ID=22982734
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN89107823A Expired CN1016203B (zh) | 1988-10-17 | 1989-10-11 | 油井注水泥方法及人工操作的孔口封堵工具 |
Country Status (9)
Country | Link |
---|---|
US (1) | US4850432A (zh) |
EP (1) | EP0376431A1 (zh) |
JP (1) | JPH02144492A (zh) |
CN (1) | CN1016203B (zh) |
BR (1) | BR8905231A (zh) |
CA (1) | CA1301056C (zh) |
DK (1) | DK513189A (zh) |
MX (1) | MX172235B (zh) |
NO (1) | NO892402L (zh) |
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1988
- 1988-10-17 US US07/258,929 patent/US4850432A/en not_active Expired - Fee Related
-
1989
- 1989-05-10 EP EP89304765A patent/EP0376431A1/en not_active Ceased
- 1989-06-12 MX MX026523A patent/MX172235B/es unknown
- 1989-06-12 NO NO89892402A patent/NO892402L/no unknown
- 1989-06-13 CA CA000602583A patent/CA1301056C/en not_active Expired - Fee Related
- 1989-10-09 JP JP1262296A patent/JPH02144492A/ja active Pending
- 1989-10-11 CN CN89107823A patent/CN1016203B/zh not_active Expired
- 1989-10-16 DK DK513189A patent/DK513189A/da not_active Application Discontinuation
- 1989-10-16 BR BR898905231A patent/BR8905231A/pt unknown
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CN102918227A (zh) * | 2010-03-31 | 2013-02-06 | 哈里伯顿能源服务公司 | 可转换的井下隔离塞 |
Also Published As
Publication number | Publication date |
---|---|
EP0376431A1 (en) | 1990-07-04 |
MX172235B (es) | 1993-12-08 |
DK513189D0 (da) | 1989-10-16 |
JPH02144492A (ja) | 1990-06-04 |
BR8905231A (pt) | 1990-05-15 |
DK513189A (da) | 1990-04-18 |
US4850432A (en) | 1989-07-25 |
CN1016203B (zh) | 1992-04-08 |
NO892402D0 (no) | 1989-06-12 |
NO892402L (no) | 1990-04-18 |
CA1301056C (en) | 1992-05-19 |
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