WO2016074471A1 - 随钻测量防脱键工具 - Google Patents

随钻测量防脱键工具 Download PDF

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Publication number
WO2016074471A1
WO2016074471A1 PCT/CN2015/080589 CN2015080589W WO2016074471A1 WO 2016074471 A1 WO2016074471 A1 WO 2016074471A1 CN 2015080589 W CN2015080589 W CN 2015080589W WO 2016074471 A1 WO2016074471 A1 WO 2016074471A1
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WO
WIPO (PCT)
Prior art keywords
piston rod
drilling
spring
measurement
ring
Prior art date
Application number
PCT/CN2015/080589
Other languages
English (en)
French (fr)
Inventor
赵锦栋
李永波
刘成林
牛义
Original Assignee
深圳市百勤石油技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 深圳市百勤石油技术有限公司 filed Critical 深圳市百勤石油技术有限公司
Publication of WO2016074471A1 publication Critical patent/WO2016074471A1/zh

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Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B47/00Survey of boreholes or wells
    • E21B47/01Devices for supporting measuring instruments on drill bits, pipes, rods or wirelines; Protecting measuring instruments in boreholes against heat, shock, pressure or the like

Definitions

  • the present invention relates to drilling techniques and, more particularly, to an anti-off key tool for measuring while drilling.
  • Measurement While Drilling is an advanced technology in directional drilling that allows continuous directional drilling to measure information near the drill and instantly transfer the information to the surface.
  • LWD Logging While Drilling
  • the MWD tool components are housed in a non-magnetic drill collar and are mounted using a lower seat key to achieve a short length and salvage.
  • the upper end of the non-magnetic drill collar is connected to the drill pipe, and the lower end is connected to the power drill.
  • the MWD tool component measures various data and feeds it back to the ground.
  • the drilling is too fast or the horizontal section is inclined, it is easy to cause the instrument to be de-bonded. If it is necessary to reduce the occurrence of the de-bonding, it is necessary to repeatedly fill the drill pipe into the mud to control the drilling speed, thus affecting Work efficiency.
  • the solution to the above problem is to provide a method for measuring the anti-off key while drilling, comprising a fishing head located at the top, the lower end of the fishing head is connected to the fixing ring by a shear pin, and the fixing ring is further sleeved Connected to the top end of the connecting rod, the bottom end of the connecting rod is fixedly connected with the spring tube, and the drilling-proof measuring anti-off key tool further comprises a piston rod, and the top of the piston rod is movably inserted in the axial direction a lower end of the spring tube, a spring is mounted in the spring tube, one end of the spring abuts against the inner wall of the top of the spring tube, and the other end of the spring abuts against the top of the piston rod; the bottom end of the piston rod is also screwed to the lower plate
  • the lower orifice plate is for connection to a measurement while drilling tool.
  • a first sealing ring is disposed at a joint of the fixing ring and the connecting rod, and the first sealing ring is disposed on an outer sidewall of the connecting rod, The first sealing ring closely fits the connecting rod and the inner side wall of the fixing ring.
  • a plurality of sealing rings are disposed at a joint of the piston rod and the spring cylinder, and the sealing ring is disposed on an outer side wall of the piston rod, the sealing ring The piston rod and the inner side wall of the spring tube are closely attached.
  • the sealing ring includes two second sealing rings disposed at an interval from the one end of the spring; the sealing ring further includes a lower end of the spring tube The third sealing ring.
  • a fourth sealing ring is disposed at a joint of the piston rod and the lower orifice plate, and the fourth sealing ring ring is disposed on an outer side wall of the piston rod.
  • the fourth sealing ring closely fits the inner side wall of the piston rod and the lower orifice plate.
  • the on-going measurement of the anti-off key tool of the present invention, the piston rod and/or the inner side wall of the spring tube are provided with a limiting step for limiting the moving position of the piston rod.
  • the fishing head includes a conical head located at an upper portion, the conical head is connected to the fishing head orifice plate by a fishing neck, and the inner side of the fixing ring is sleeved The head plate is salvaged, and the shear pin is inserted into the hole plate of the fishing head after passing through the fixing ring from the outside of the fixing ring.
  • the anti-off key tool for measuring while drilling according to the present invention is made of Monel steel.
  • the anti-off-off tool for measuring while drilling according to the present invention can effectively avoid the de-keying, thereby realizing continuous processing and reducing the number of times of drilling; since the problem of de-bonding is avoided, the number of times of filling the mud in the middle can be reduced, and the number of times is increased. Drilling speed reduces drilling cycle, which saves drilling costs.
  • 1 is a schematic structural view of a method for measuring an anti-off key while drilling according to the present invention
  • 2 is a cross-sectional view of the fishing head of the anti-off-key tool of the same-diameter measurement of FIG. 1;
  • FIG. 3 is a schematic structural view of the lower middle portion of the anti-off-off tool of the measurement while drilling according to FIG. 1;
  • FIG. 4 is a cross-sectional view of the fishing head of the anti-off-key tool of the drilling while drilling of FIG. 1;
  • FIG. 5 is a cross-sectional view of the connecting rod of the anti-off-key tool of the same drilling of FIG. 1;
  • FIG. 6 is a cross-sectional view of the spring tube of the anti-off-off tool of the measurement while drilling according to FIG. 1;
  • FIG. 7 is a cross-sectional view of the piston rod of the anti-off-key tool of the same time measurement of FIG. 1;
  • FIG. 8 is a cross-sectional view of the lower orifice plate of the anti-offset tool for drilling while drilling according to FIG. Type the description of the drawing here to describe the paragraph.
  • the present invention is directed to the existing MWD tool, when the drill is too fast or the horizontal section is inclined obliquely, which is easy to cause the problem of the instrument being de-keyed, and provides a function capable of reducing the off-key without controlling the drilling speed.
  • MW D anti-off button tool The invention processes the limit step on the piston rod to ensure that the piston rod does not fall off, and the effect of preventing the off-key is ensured; the built-in spring enables the piston rod to move within a certain range, and does not need to adjust the size, especially suitable for various drilling. Drilling with a high speed and a large slanting of the horizontal section.
  • FIG. 1 a half cross-sectional view of the anti-off-off tool for measurement while drilling according to the present invention is shown.
  • the fishing head 100 including the upper end and the fixing ring 300 connected to the fishing head 100 through the shear pin, the fishing head hole extends downwardly along the circumferential outer side of the fishing head 100
  • the plate, the shear pin is connected to the central axis from the outside, and the fishing head plate is integrally connected with the fixing ring 300.
  • a sleeve for connecting to the connecting rod 500 is axially extended, and the sleeve is sleeved at the upper end of the connecting rod 500.
  • a first sealing ring 401 is disposed on the inner wall of the sleeve of the fixing ring 300 or on the outer circumference of the connecting rod 500 and the sleeve.
  • the first seal ring 401 is in close contact with the outer side of the connecting rod 500 and the inner wall of the sleeve of the retaining ring 300, thereby achieving sealing.
  • the connecting rod 500 is a rigid cylindrical rod whose lower end is fixedly coupled to the upper end of the spring barrel 600.
  • a spring 700 is mounted in the spring and 600. The upper end of the spring 700 abuts against the upper end of the spring barrel 600, and the lower end of the spring 700 abuts against the upper end of the piston rod 900.
  • the lower end of the piston rod 900 is threadedly coupled to the lower orifice plate 800.
  • two second sealing rings 402 are disposed on one end of the spring 700, and the second sealing ring 402 abuts against the outer side wall of the piston rod 900 and the inner side wall of the spring tube 600;
  • a third sealing ring 403 is disposed at the lower end of the spring tube 600.
  • the third sealing ring 403 is in close contact with the outer side wall of the piston rod 900 and the inner side wall of the spring tube 600.
  • There is a fourth sealing ring 404 which ensures the sealing performance of the piston rod 900 and the lower orifice plate 800 .
  • the anti-off key tool of the above structure is used, the anti-off key tool is first placed into the non-magnetic drill collar, so that the end surface of the fixing ring 300 is pressed against the end face of the drill, and the lower hole plate 800 is pressed against
  • the upper end of the drilling measuring tool due to the built-in spring 700 , the piston rod can move within a certain range without adjusting the size of the MWD tool, and also reduce the impact of the drilling speed; and in order to ensure that the piston rod 900 does not fall off,
  • the ⁇ ensures that the spring 700 is not eroded, and the finite step is processed on the piston rod 900 to enhance the anti-off key effect.
  • FIG. 2 illustrates how the fishing head 100 is coupled to the stationary ring 300.
  • the fishing head orifice of the fishing head 100 includes four connecting sheets, the inner diameter of the fixing ring 300 is matched with the size of the four connecting sheets, and the inner side of the fixing ring 300 is fitted to the four connecting sheets. Then, through the four shear pins 200, the outer side of the fixing ring 300 is inserted into the connecting sheet to realize the connection of the fishing head 100 and the fixing ring 300.
  • the shear value is calculated according to the number of the shear pins 200, and the shear tonnage is applied from above, so that all the shear pins 200 are interrupted, and the fishing head 100 is separated from the fixed ring 300, and further You can take out the anti-off key tool and salvage the MWD.
  • salvage it is necessary to calculate the containment, and then enter the U-shaped salvage, and 0.1 to 0.2 tons below, so that the salvage head enters the U-shaped salvage; then the mountain shear tonnage shear pin , so that the fishing head is separated from the fixed ring, and the off-key tool is prevented at the beginning.
  • FIG. 3 is an enlarged schematic view showing the lower structure of the anti-off key tool while drilling.
  • the spring barrel 600 is a rod-shaped member having a cavity therein, and a spring 700 is placed in the cavity.
  • the spring 700 is in an uncompressed or slightly compressed state, one end of the spring 700 abuts against the top wall of the spring cylinder 600, and the lower end abuts against the piston rod 900, so that the piston rod 900 can adjust the position along the axial direction to achieve the anti-off.
  • the key tool does not need to adjust the size of the MWD tool.
  • a limit step is provided on the inner wall of the joint.
  • the function of the limiting step is to enable the piston rod 900 to move within a defined range of positions to prevent the piston rod 900 from falling out of the spring barrel 600; in addition, the limiting step also enhances the seal between the piston rod 900 and the spring barrel 600 Performance, to ensure that the spring 700 will not be washed away.
  • a plurality of locations on the piston rod 900 are provided with seals to ensure a good closure within the spring barrel 600.
  • two spaced seal ring mounting grooves are provided, and after the two second seal rings 402 are placed in the seal ring mounting groove, the inner side wall of the spring tube 600 is tightly closed. paste.
  • the arrangement of the seal ring mounting groove is not limited to the piston rod 900, and may be disposed at the upper and lower ends of the limit step, such as the fifth seal ring 405, the third seal ring 403, and the like. It should be understood by those skilled in the art that the specific number and position of the seals can be flexibly set according to the actual drilling conditions.
  • the seal arrangement in Fig. 3 is only a feasible way and is not the only solution.
  • FIG. 4 a cross-sectional view of the fishing head 100 is shown.
  • the fishing head 100 can be separated from the instrument below when it is necessary to carry out salvage operations, so as to avoid direct damage to the instrument.
  • the upper end of the fishing head 100 is a conical head 101 which is arranged to facilitate the passage of the clog through the blockage, and the conical head 101 is connected to the fishing head orifice 103 by the elongated fishing neck 102.
  • the fishing head orifice plate 103 is provided with a pin hole pointing in the axial direction.
  • the shear pin After the shear pin passes through the fixing ring, it is inserted into the pin hole to realize the connection between the fishing head 100 and the lower parts; and the need for salvage, By lifting the tonnage, the shear pin is sheared and the fishing head 100 is separated from the various components below, thereby avoiding the damage caused by direct salvage of the instrument.
  • FIG. 5 A schematic structural view of the link 500 is shown in FIG.
  • the middle portion of the connecting rod 500 is a smooth cylindrical hard rod, and the two ends are provided with a connecting portion 501, and the connecting portion 501 can be a thread, a protruding block or the like to realize a screw connection, a snap-fit connection or even an interference fit with other components.
  • the link 500 can be stably integrated with other components.
  • FIG. 1 A schematic structural view of the spring barrel 600 is shown in FIG.
  • the arrangement of the spring barrel 600 is primarily intended to provide a suitable space for the spring 700 to be placed.
  • the upper end of the spring cylinder 600 is connected to the connecting rod 500; the middle portion is a cavity 601 for placing the spring 700; the lower end is sleeved with the piston rod 900 through the lower joint, so that the upper end of the piston rod 900 abuts against the spring 700, and the piston rod 900 can
  • a certain range of movement is performed at the lower end position of the spring cylinder 600.
  • the spring cylinder 600 and the spring 700 cooperate with each other to realize the piston rod 900. 70mm movement range.
  • FIG. 7 it is a schematic cross-sectional view of the piston rod 900.
  • the piston rod 900 is a rigid long rod whose upper end abuts the spring 700.
  • the seal ring mounting groove 901 is used to place the seal ring so that the seal ring does not displace relative to the piston rod 900 during movement of the piston rod 90 0 .
  • a thread 902 is provided for threading the lower orifice plate 800.
  • the lower orifice plate 800 serves as the lowermost end member of the entire anti-off key tool, and its structure is as shown in FIG.
  • the lower orifice plate 80 0 includes two portions: a link connecting portion 801 provided with an internal thread and an MWD connecting portion 802 fixedly coupled to the link connecting portion 801.
  • the link connecting portion 801 is fixedly coupled to the link 900 by internal threads, and the MWD connecting portion 802 is placed against the upper end of the MWD instrument for connection to the MWD instrument.
  • the fishing head 100, the fixing ring 300, the connecting rod 500, the spring cylinder 600, the piston rod 900, and the lower orifice plate 800 are all made of Monel steel, which can reduce magnetic field interference and ensure the MWD instrument. The accuracy.
  • the piston rod is prevented from falling off, and the anti-off key effect is ensured; the built-in spring enables the piston rod to move within a certain range. , no need to adjust the size, especially for a variety of drilling speeds and drilling in the horizontal section of the well. Since the debonding is avoided, the drilling can be carried out continuously, reducing the drilling. Assume that a horizontal well basically causes more than three times of drilling according to the original technology. After adopting the technology of the present invention, the number can be greatly reduced, and each well can reduce the economic loss by about 600,000 to 100,000 yuan. Moreover, it avoids the problem of controlling the drilling speed in the past, improves the drilling speed and shortens the drilling cycle, and saves 0.5 day drilling cycle per well, saving the cost of 40,000 yuan.

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  • Engineering & Computer Science (AREA)
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Abstract

公开了一种随钻测量防脱键工具,包括位于顶部的打捞头(100),打捞头(100)下端通过剪切销钉(200)与固定环(300)连接,固定环(300)还套接连杆(500)的顶端,连杆(500)的底端与弹簧筒(600)的上端固定连接,弹簧筒(600)还与活塞杆(900)可活动连接,弹簧筒(600)内安装有弹簧(700),弹簧(700)的一端抵接在弹簧筒(600)顶部内壁,弹簧(700)另一端抵接活塞杆(900)顶部;活塞杆(900)的底端还与下孔板(800)螺纹连接,下孔板(800)用于与随钻测量工具连接。实施本发明,能够有效避免脱键,从而实现连续作业,减少起钻次数;由于避免了脱键的问题,能够减少中途灌入泥浆的次数,提高下钻速度,缩短钻井周期,从而节约了钻探成本。

Description

随钻测量防脱键工具
技术领域
[0001] 本发明涉及钻探技术, 更具体地说, 涉及一种随钻测量防脱键工具。
背景技术
[0002] 随钻测量 (Measurement While Drilling) 简称 MWD, 是定向钻进中一种先进的 技术手段, 可以不间断定向钻进而测量靠近钻具附近的信息, 并将信息即刻传 送到地表的过程。 随着技术的进步, 现代随钻测量已发展为随钻测井 (Logging While Drilling) , 简称 LWD, 不仅可以监控定向钻进, 还可以进行综合测井。
[0003] 一般的, MWD工具部件容纳在无磁钻铤中, 采用下坐键式进行安装, 以实现 零长较短且可打捞。 无磁钻铤的上端与钻杆连接, 下端与动力钻具连接, 在钻 探的过程中 MWD工具部件测量各种数据, 并反馈给地面。 然而在下钻过快或者 是水平段井斜较大吋, 很容易造成仪器脱键; 若是要减少脱键的发生, 就不得 不进行反复接方钻杆灌入泥浆, 控制下钻速度, 从而影响了工作效率。 在此处 键入背景技术描述段落。
技术问题
[0004] 针对现有的钻探技术中, 进行随钻测量吋若下钻过快或者是水平段井斜较大吋 , 很容易造成仪器脱键的问题, 提供一种随钻测键工具。
问题的解决方案
技术解决方案
[0005] 本发明解决上述问题的方案是, 提供一种随钻测量防脱键工具, 包括位于顶部 的打捞头, 所述打捞头下端通过剪切销钉与固定环连接, 所述固定环还套接连 杆的顶端, 所述连杆的底端与弹簧筒的固定连接, 所述随钻测量防脱键工具还 包括活塞杆, 所述活塞杆顶部沿轴向可活动式地插接在所述弹簧筒的下端, 所 述弹簧筒内安装有弹簧, 弹簧的一端抵接在弹簧筒顶部内壁, 弹簧另一端抵接 活塞杆顶部; 所述活塞杆的底端还与下孔板螺纹连接, 所述下孔板用于与随钻 测量工具连接。 [0006] 本发明的随钻测量防脱键工具, 所述固定环与连杆的连接处设置有第一密封圈 , 所述第一密封圈环设在所述连杆外侧壁上, 所述第一密封圈紧密贴合所述连 杆和所述固定环内侧壁。
[0007] 本发明的随钻测量防脱键工具, 所述活塞杆与所述弹簧筒的连接处设置有多个 密封圈, 所述密封圈环设在活塞杆外侧壁上, 所述密封圈紧密贴合所述活塞杆 和所述弹簧筒内侧壁。
[0008] 本发明的随钻测量防脱键工具, 所述密封圈包括位于靠近所述弹簧一端的两个 相互间隔设置的第二密封圈; 所述密封圈还包括靠近所述弹簧筒下端的第三密 封圈。
[0009] 本发明的随钻测量防脱键工具, 所述活塞杆与下孔板的连接处设置有第四密封 圈, 所述第四密封圈环设在所述活塞杆外侧壁上, 所述第四密封圈紧密贴合所 述活塞杆和所述下孔板内侧壁。
[0010] 本发明的随钻测量防脱键工具, 所述活塞杆和 /或所述弹簧筒内侧壁上, 设置 有用于限制所述活塞杆移动位置的限位台阶。
[0011] 本发明的随钻测量防脱键工具, 所述打捞头包括位于上部的锥形头, 所述锥形 头通过打捞颈连接打捞头孔板, 所述固定环的内侧套接所述打捞头孔板, 所述 剪切销钉从所述固定环外侧穿过固定环后, 接入到所述打捞头孔板中。
[0012] 本发明的随钻测量防脱键工具, 打捞头、 固定环、 连杆、 弹簧筒、 活塞杆、 下 孔板由蒙乃尔钢制成。
发明的有益效果
有益效果
[0013] 实施本发明的随钻测量防脱键工具, 能够有效避免脱键, 从而实现连续加工, 减少起钻次数; 由于避免了脱键的问题, 能够减少中途灌入泥浆的次数, 提高 下钻速度, 缩短钻井周期, 从而节约了钻探成本。
对附图的简要说明
附图说明
[0014] 以下结合附图对本发明进行说明, 其中:
[0015] 图 1为本发明随钻测量防脱键工具的结构示意图; [0016] 图 2为图 1的随钻测量防脱键工具中打捞头的横截面示意图;
[0017] 图 3为图 1的随钻测量防脱键工具中下部的结构示意图;
[0018] 图 4为图 1的随钻测量防脱键工具中打捞头的剖面示意图;
[0019] 图 5为图 1的随钻测量防脱键工具中连杆的剖面示意图;
[0020] 图 6为图 1的随钻测量防脱键工具中弹簧筒的剖面示意图;
[0021] 图 7为图 1的随钻测量防脱键工具中活塞杆的剖面示意图;
[0022] 图 8为图 1的随钻测量防脱键工具中下孔板的剖面示意图。 在此处键入附图说明 描述段落。
实施该发明的最佳实施例
本发明的最佳实施方式
[0023] 本发明针对现有的 MWD工具在下钻过快或者是水平段井斜较大吋, 很容易造 成仪器脱键的问题, 提供一种能够不需要进行控制下钻速度就能减少脱键的 MW D防脱键工具。 本发明通过在活塞杆上加工限位台阶, 保证活塞杆不会脱落, 保 证防脱键的效果; 同吋内置弹簧, 使得活塞杆能够在一定范围内活动, 无需调 节尺寸, 尤其适应各种钻探速度以及水平段井斜较大吋的钻探。
[0024] 为了更好地对本发明进行说明, 以下结合附图和具体实施方式进行解析。
[0025] 如图 1所示, 为本发明的随钻测量防脱键工具的半剖视图。 在图 1所示的随钻测 量防脱键工具中, 包括上端的打捞头 100以及与打捞头 100通过剪切销钉连接的 固定环 300, 打捞头 100的下方沿周向外侧延伸出打捞头孔板, 剪切销钉从外侧 指向中心轴线的方式, 将打捞头孔板与固定环 300连接成一体。 在固定环 300的 下方, 沿轴向延伸出一个用于与连杆 500进行连接安装的套筒, 套筒套接在连杆 500的上端。 为了保证连接的密封性能较好, 防止在钻探的过程中灌入泥浆, 在 该固定环 300的套筒的内壁上或者对应连杆 500与套筒连接的外周上设置第一密 封圈 401, 该第一密封圈 401同吋紧贴连杆 500的外侧与固定环 300套筒的内壁, 从而实现密封。
[0026] 连杆 500为一根硬质的柱形杆, 其下端与弹簧筒 600的上端固定连接。 在弹簧同 600内安装有一个弹簧 700, 弹簧 700的上端抵接在弹簧筒 600的上端, 弹簧 700的 下端抵接在活塞杆 900的上端。 活塞杆 900的下端则与下孔板 800螺纹连接。 [0027] 为了保证整个随钻测量防脱键工具能够在工作的吋候保持良好的密闭性能, 在 活塞杆 900上的多个位置设置密封圈。 例如在活塞杆 900上, 靠近弹簧 700的一端 上设置两圈第二密封圈 402, 第二密封圈 402同吋紧贴活塞杆 900的外侧壁以及弹 簧筒 600的内侧壁; 在活塞杆 900靠近弹簧筒 600下端, 设置第三密封圈 403, 第 三密封圈 403同吋紧贴活塞杆 900的外侧壁以及弹簧筒 600的内侧壁; 在下孔板 80 0与活塞杆 900的连接处, 还设置有第四密封圈 404, 第四密封圈 404保证了活塞 杆 900与下孔板 800的密封性能。
[0028] 当使用以上结构的防脱键工具吋, 先将防脱键工具放入到无磁钻铤内, 使得固 定环 300的端面顶住钻具工扣端面, 下孔板 800顶住随钻测量工具的上端, 由于 内置弹簧 700, 活塞杆可以在一定范围内活动而无需调节 MWD工具的尺寸, 此 外还能减少钻入速度带来的影响; 而为了保证活塞杆 900不会脱落, 同吋保证弹 簧 700不会被冲蚀, 在活塞杆 900上加工有限位台阶, 加强了防脱键的效果。
[0029] 为了更好的说明图 1中, 每个部分的结构与功能, 以下将对每一个部分进行详 细说明。
[0030] 图 2揭示了打捞头 100如何与固定环 300进行连接。 如图 2所示, 打捞头 100的打 捞头孔板包括 4片连接页, 固定环 300的内径与这 4片连接页的大小相适配, 固定 环 300的内侧与这 4片连接页贴合, 然后通过 4个剪切销钉 200, 从固定环 300的外 侧穿入到连接页中, 实现打捞头 100与固定环 300的连接成一体。 当需要打捞的 吋候, 则根据剪切销钉 200的个数计算出剪切值, 从上方施加上提剪切吨位, 使 得所有的剪切销钉 200间断, 打捞头 100与固定环 300分离, 进而可以起出防脱键 工具, 进行 MWD的打捞。 具体的, 在进行打捞的吋候, 想要计算出将其遏制, 然后下入 U形的打捞器, 并下方 0.1到 0.2吨, 使得打捞头进入 U形打捞器; 然后山 体剪切吨位剪断销钉, 使得打捞头与固定环分离, 期初防脱键工具。
[0031] 如图 3给出了随钻测量防脱键工具的下部结构的放大示意图。 弹簧筒 600为一个 外形为杆状、 内部具有空腔的部件, 在该空腔中放置有一弹簧 700。 一般该弹簧 700处于未压缩或者略微压缩的状态, 弹簧 700的一端抵接弹簧筒 600顶壁, 下端 与活塞杆 900相互抵接, 使得活塞杆 900能够沿着轴向调整位置, 实现该防脱键 工具无需调节 MWD工具的尺寸。 此外, 在活塞杆 900外侧壁上或者弹簧筒的下 接头内壁上设置限位台阶。 限位台阶的作用是, 使得活塞杆 900能够在限定的位 置范围内进行移动, 防止活塞杆 900从弹簧筒 600脱落; 此外该限位台阶还增强 了活塞杆 900与弹簧筒 600之间的密封性能, 保证弹簧 700不会被冲蚀。
[0032] 在图 3中可以看出, 活塞杆 900上的多个位置设置了密封圈, 以保证弹簧筒 600 内的良好封闭效果。 例如在活塞杆 900上靠近弹簧 600的一端, 幵设有两个间隔 的密封圈安装槽, 两个第二密封圈 402放置在该密封圈安装槽中后, 再与弹簧筒 600的内侧壁紧贴。 当然, 密封圈安装槽的设置并不限定在活塞杆 900上, 还可 以设置在限位台阶的上下两端, 例如第五密封圈 405、 第三密封圈 403等。 本领 域的技术人员应当理解的是, 密封圈的具体设置数量和位置是可以依据实际的 钻探情况灵活设置的, 图 3中的密封圈设置仅仅是一种可行的方式, 并不是唯一 的方案。
[0033] 如图 4所示, 给出了打捞头 100的剖视图。 打捞头 100可以在需要进行打捞作业 的吋候, 实现与下方的仪器分离, 避免直接打捞仪器产生损伤。 打捞头 100的上 端是一个锥形头 101, 锥形头 101的设置是为了方便在打捞吋穿过堵塞物, 锥形 头 101通过细长形的打捞颈 102连接打捞头孔板 103。 打捞头孔板 103上设置有指 向轴线方向的销钉孔, 剪切销钉穿过固定环后, 接入到销钉孔中, 实现打捞头 1 00与下方各个部件的连接; 而需要打捞的吋候, 通过上提吨位, 剪切销钉被剪 断, 打捞头 100与下方的各个部件分离, 从而避免了直接打捞仪器产生的损坏问 题。
[0034] 如图 5所示给出了连杆 500的结构示意图。 连杆 500中部为光滑的圆柱形硬质杆 , 两头设置有连接部 501, 连接部 501可以是螺纹、 突起块等, 以实现与其他部 件的螺纹连接、 卡嵌连接甚至是过盈配合等, 只要连杆 500能稳定地与其他部件 连接成一体即可。
[0035] 如图 6所示给出了关于弹簧筒 600的结构示意图。 弹簧筒 600的设置主要是为了 提供合适的空间给弹簧 700放置。 弹簧筒 600的上端与连杆 500连接; 中部为空腔 601, 用于放置弹簧 700; 下端通过下接头套接活塞杆 900, 使得活塞杆 900的上 端与弹簧 700抵接, 并且活塞杆 900能够在弹簧筒 600的下端位置进行一定范围内 的移动。 在本发明中, 弹簧筒 600以及弹簧 700相互配合, 能够实现活塞杆 900约 70mm的移动范围。
[0036] 如图 7所示, 为活塞杆 900的剖面示意图。 活塞杆 900为硬质长杆, 其上端与弹 簧 700抵接。 在活塞杆 900的外侧上, 靠近上端 (即靠近弹簧 700的一端) 幵设有 两个环绕活塞杆 900外侧的密封圈安装槽 901, 并且这两个密封圈安装槽 901相互 间隔一定距离。 密封圈安装槽 901用于放置密封圈, 使得密封圈能够在活塞杆 90 0移动的过程中不会相对于活塞杆 900产生位移。 而在活塞杆 900的另一端上, 则 设置有螺纹 902, 该螺纹 902用于与下孔板 800进行螺纹连接。 当活塞杆 900与下 孔板 800进行固定连接之后, 活塞杆 900可以带动下孔板 800—起相对与弹簧筒 60 0进行位移。
[0037] 而下孔板 800作为整个防脱键工具的最下端部件, 其结构如图 8所示。 下孔板 80 0包括两个部分: 设置有内螺纹的连杆连接部 801以及与连杆连接部 801固定连接 的 MWD连接部 802。 连杆连接部 801通过内部的螺纹实现与连杆 900的固定连接 , 而 MWD连接部 802则顶住 MWD仪器的上端, 实现与 MWD仪器的连接。
[0038] 在以上的各个部件中, 打捞头 100、 固定环 300、 连杆 500、 弹簧筒 600、 活塞杆 900、 下孔板 800均采用蒙乃尔钢制成, 能够减少磁场干扰, 保证 MWD仪器的精 准度。
[0039] 当按照上述的部件进行与 MWD仪器配合工作吋, 通过加工限位台阶, 保证活 塞杆不会脱落, 保证防脱键的效果; 同吋内置弹簧, 使得活塞杆能够在一定范 围内活动, 无需调节尺寸, 尤其适应各种钻探速度以及水平段井斜较大吋的钻 探。 由于避免了脱键, 因而钻探可以连续进行, 减少起下钻。 假设一口水平井 按照原先技术, 基本要造成 3次以上的起钻, 而采用了本发明的技术之后, 可以 极大的减少该数字, 每口井约可以减少 6至 10万元的经济损失。 而且避免了以往 需要控制下钻速度的问题, 提高了了下钻速度缩短钻井周期, 每口井可节约 0.5 天钻井周期, 节约 4万元的成本。
[0040] 以上仅为本发明具体实施方式, 不能以此来限定本发明的范围, 本技术领域内 的一般技术人员根据本创作所作的均等变化, 以及本领域内技术人员熟知的改 变, 都应仍属本发明涵盖的范围。

Claims

权利要求书
一种随钻测量防脱键工具, 其特征在于, 包括位于顶部的打捞头 (10 0) , 所述打捞头 (100) 下端通过剪切销钉 (200) 与固定环 (300) 连接, 所述固定环 (300) 还套接连杆 (500) 的顶端, 所述连杆 (50 0) 的底端与弹簧筒 (600) 固定连接, 所述随钻测量防脱键工具还包 括活塞杆 (900) , 所述活塞杆 (900) 顶部沿轴向可活动式地插接在 所述弹簧筒 (600) 的下端, 所述弹簧筒 (600) 内安装有弹簧 (700 ) , 所述弹簧 (700) 的一端抵接在所述弹簧筒 (600) 顶部内壁, 所 述弹簧 (600) 的另一端抵接活塞杆 (900) 顶部; 所述活塞杆 (900 ) 的底端还与下孔板 (800) 螺纹连接, 所述下孔板 (800) 用于与随 钻测量工具连接。
根据权利要求 1所述的随钻测量防脱键工具, 其特征在于, 所述固定 环 (300) 与连杆 (500) 的连接处设置有第一密封圈 (401) , 所述 第一密封圈 (401) 环设在所述连杆 (500) 外侧壁上, 所述第一密封 圈 (401) 紧密贴合所述连杆 (500) 和所述固定环 (300) 内侧壁。 根据权利要求 1所述的随钻测量防脱键工具, 其特征在于, 所述活塞 杆 (900) 与所述弹簧筒 (600) 的连接处设置有多个密封圈, 所述密 封圈环设在所述活塞杆 (900) 外侧壁上, 所述密封圈紧密贴合所述 活塞杆 (900) 和所述弹簧筒 (600) 内侧壁。
根据权利要求 3所述的随钻测量防脱键工具, 其特征在于, 所述密封 圈包括位于靠近所述弹簧 (700) —端的两个相互间隔设置的第二密 封圈 (402) ; 所述密封圈还包括靠近所述弹簧筒 (600) 下端的第三 密封圈 (403) 。
根据权利要求 1所述的随钻测量防脱键工具, 其特征在于, 所述活塞 杆 (900) 与下孔板 (800) 的连接处设置有第四密封圈 (404) , 所 述第四密封圈 (404) 环设在所述活塞杆 (900) 外侧壁上, 所述第四 密封圈 (404) 紧密贴合所述活塞杆 (900) 和所述下孔板 (800) 内
[权利要求 6] 根据权利要求 1所述的随钻测量防脱键工具, 其特征在于, 所述活塞 杆 (900) 外侧和 /或所述弹簧筒 (600) 内侧壁上, 设置有用于限制 所述活塞杆 (900) 移动位置的限位台阶。
[权利要求 7] 根据权利要求 1所述的随钻测量防脱键工具, 其特征在于, 所述打捞 头包括位于上部的锥形头 (101) , 所述锥形头 (101) 通过打捞颈 ( 102) 连接打捞头孔板 (103) , 所述固定环 (300) 的内侧套接所述 打捞头孔板 (103) , 所述剪切销钉 (200) 从所述固定环 (300) 外 侧穿过固定环 (300) 后, 接入到所述打捞头孔板 (103) 中。
[权利要求 8] 根据权利要求 1所述的随钻测量防脱键工具, 其特征在于, 所述打捞 头 (100) 、 固定环 (300) 、 连杆 (500) 、 弹簧筒 (600) 、 活塞杆
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