WO2017024527A1 - 一种精确可调式可控震源振动器平板预应力结构及使用方法 - Google Patents

一种精确可调式可控震源振动器平板预应力结构及使用方法 Download PDF

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Publication number
WO2017024527A1
WO2017024527A1 PCT/CN2015/086660 CN2015086660W WO2017024527A1 WO 2017024527 A1 WO2017024527 A1 WO 2017024527A1 CN 2015086660 W CN2015086660 W CN 2015086660W WO 2017024527 A1 WO2017024527 A1 WO 2017024527A1
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Prior art keywords
plate
vibrator
piston rod
pressure plate
precisely adjustable
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PCT/CN2015/086660
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English (en)
French (fr)
Inventor
赵龙
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深圳朝伟达科技有限公司
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Application filed by 深圳朝伟达科技有限公司 filed Critical 深圳朝伟达科技有限公司
Priority to PCT/CN2015/086660 priority Critical patent/WO2017024527A1/zh
Priority to CN201580002811.8A priority patent/CN107076866B/zh
Publication of WO2017024527A1 publication Critical patent/WO2017024527A1/zh

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V1/00Seismology; Seismic or acoustic prospecting or detecting
    • G01V1/02Generating seismic energy
    • G01V1/04Details
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V1/00Seismology; Seismic or acoustic prospecting or detecting
    • G01V1/02Generating seismic energy
    • G01V1/133Generating seismic energy using fluidic driving means, e.g. highly pressurised fluids; using implosion

Definitions

  • the invention relates to the field of petroleum geophysical exploration, in particular to an explanation technique for a hydraulic fracturing microseismic event, and in particular to an explanation method and system for a hydraulic fracturing microseismic event.
  • the pre-stressed structure of the vibrator vibrator plate is one of the factors to improve the excitation accuracy of the seismic signal.
  • the traditional flat prestressed structure is (Fig. 1).
  • the top plate 4 and the piston rod 3 are rigidly connected by bolts 7 through padding.
  • the sheet 6 method adjusts the gap between the four guide posts 2 and the top plate 4 (generally 0.3-0.4 mm), and then rigidly connects the four uprights and the upper top plate by bolts to form a flat prestressed structure, the prestressed structure
  • the disadvantage is that the prestress distribution is not uniform and can not be precisely adjusted.
  • each column is pressurized by a hydraulic wrench, and then the pressure of the release liquid is pre-tightened, and the overall structural processing technology and prestressing
  • the adjustment is very complicated, and the present invention proposes a flat prestressed structure of a simple, but precisely adjustable, vibrator vibrator.
  • a method for using a pre-stressed structure of a precisely adjustable vibrator vibrator when loading pre-stress, first
  • the top plate and the four guide posts are rigidly connected by bolts, and the gap between the pressure plate and the top plate is adjusted by rotating the pressure plate. Since the pitch of the thread is 2 mm, 12 bolts on the pressure plate are equivalent to equally dividing the pressure plate 12, that is, The minimum adjustment clearance is 1/6mm.
  • the pre-stress of the 12 bolts on the platen to tighten the entire structure is established.
  • the invention has the advantages that the adjustment of the gap is more scientific and reasonable, and the operation is simpler; the prestress of the whole flat structure is more uniform and precise and controllable; and the assembly process of the vibrating plate prestressed structure is effectively improved. Processability, reducing the process requirements and processing difficulty of the product in the production process.
  • the invention has achieved good results through the preliminary test in the high-precision vibrator development project, and is beneficial to improving the excitation signal quality of the vibrator.
  • Figure 1 is a schematic view of the prior art structure.

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  • Engineering & Computer Science (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Acoustics & Sound (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)

Abstract

一种精确可调式可控震源振动器平板预应力结构,平板(1)与活塞杆(3)、导柱(2)通过焊接或第二螺栓(9)刚性连接,活塞杆穿过顶板(4),在活塞杆顶端加工出螺纹(10),压盘(5)通过螺纹与活塞杆连接,压盘通过第一螺栓(8)与顶板连接,还公开了一种精确可调式可控震源振动器平板预应力结构的使用方法,应用在地震勘探领域。采用均匀可调式可控震源振动器平板预应力结构,使得整个平板结构的预应力更加均匀且精确可控,有效改善了可控震源平板预应力结构装配过程中的加工工艺性。

Description

一种精确可调式可控震源振动器平板预应力结构及使用方法 技术领域
本发明关于石油地球物理勘探领域,特别是关于水力压裂微地震事件的解释技术,具体的讲是一种水力压裂微地震事件的解释方法及系统。
背景技术
随着国民经济发展对环境资源的依赖,油气勘探以及其它环境资源的勘探活动从常规勘探向着高密度、高精度方向的发展,可控震源作为地震勘探中重要的激发环节,其现有的地震信号激发精度已经不能满足高精度地震勘探的需求。
可控震源振动器平板采用预应力结构是改善地震信号激发精度的因素之一,传统的平板预应力结构是(图1)先把顶板4和活塞杆3通过螺栓7刚性连接起来,通过加垫片6方式调整四个导柱2与顶板4间的间隙(一般是在0.3-0.4mm),之后通过螺栓把四个立柱和上顶板刚性连接起来形成平板预应力结构,这种预应力结构的缺点是预应力分布不均匀,无法实现精确调整;还有采用内外双筒结构的立柱,通过液压扳手给每个立柱加压,然后锁定释放液压力形成预紧,整体的结构加工工艺与预应力调整十分复杂,本发明提出了一种实现简单,但精确可调式可控震源振动器平板预应力结构。
发明内容
为了克服现有技术的不足,本发明提供一种精确可调式可控震源振动器平板预应力
结构及使用方法。
一种精确可调式可控震源振动器平板预应力结构,平板1与活塞杆3、导柱2通过焊接或第二螺栓9刚性连接,活塞杆3穿过顶板4(普通平板预应力结构不穿过顶板),在活塞杆3顶端加工出螺纹10,压盘5通过螺纹与活塞杆3连接,压盘5通过第一螺栓8与顶板4连接。
一种精确可调式可控震源振动器平板预应力结构的使用方法;加载预应力时,首先将上 顶板和四个导柱通过螺栓刚性连接,通过旋转压盘调整压盘和顶板间的间隙,由于螺纹的螺距是2mm,压盘上有12个螺栓相当于把压盘12等分,也就是说最小调整间隙是1/6mm,当调整到合适间隙后,把压盘上的12个螺栓上紧整个结构的预应力就建立起来了。
在地震勘探领域,采用均匀可调式可控震源振动器平板预应力结构。
本发明的优点是间隙的调整量化后更为科学合理,且操作更为简便;整个平板结构的预应力更为均匀且精确可控;有效地改善了可控震源平板预应力结构装配过程中的加工工艺性,降低产品在生产过程中的工艺要求与加工难度。本发明通过在高精度可控震源研制项目中的前期试验取得了很好的效果,有利于改善可控震源的激发信号品质。
附图说明
当结合附图考虑时,通过参照下面的详细描述,能够更完整更好地理解本发明以及容易得知其中许多伴随的优点,但此处所说明的附图用来提供对本发明的进一步理解,构成本发明的一部分,本发明的示意性实施例及其说明用于解释本发明,并不构成对本发明的不当限定,如图其中:
图1为现有技术结构示意图。
图2为本发明的结构示意图。
下面结合附图和实施例对本发明进一步说明。
具体实施方式
显然,本领域技术人员基于本发明的宗旨所做的许多修改和变化属于本发明的保护范围。
实施例1:一种精确可调式可控震源振动器平板预应力结构;如图2所示,平板1与活塞杆3、导柱2通过焊接或第二螺栓9刚性连接,活塞杆3穿过顶板4(普通平板预应力结构不穿过顶板),在活塞杆3顶端加工出螺纹10,压盘5通过螺纹与活塞杆3连接,压盘5通过第一螺栓8与顶板4连接。
加载预应力时,首先将上顶板和四个导柱通过螺栓刚性连接,通过旋转压盘调整压盘和 顶板间的间隙,由于螺纹的螺距是2mm,压盘上有12个螺栓相当于把压盘12等分,也就是说最小调整间隙是1/6mm,当调整到合适间隙后,把压盘上的12个螺栓上紧整个结构的预应力就建立起来了。
传统的平板预应力结构需要加工出多种尺寸的垫片用于调整四个立柱与上顶板间的间隙,且受加工精度和垫片累计误差的影响很难把四个立柱和上顶板间的间隙调整成同一尺寸,这就造成四个立柱受到的预应力是存在差异的,这种预应力的差异性会影响地震信号激发精度,也会降低振动器的使用寿命,且在用螺栓把四个立柱和顶板刚性连接时的操作也较为繁琐。为了解决上述这些问题本发明提出了这种均匀可调式可控震源振动器平板预应力结构。
如上所述,对本发明的实施例进行了详细地说明,但是只要实质上没有脱离本发明的发明点及效果可以有很多的变形,这对本领域的技术人员来说是显而易见的。因此,这样的变形例也全部包含在本发明的保护范围之内。

Claims (3)

  1. 一种精确可调式可控震源振动器平板预应力结构,其特征在于平板1与活塞杆3、导柱2通过焊接或第二螺栓9刚性连接,活塞杆3穿过顶板4,在活塞杆3顶端加工出螺纹10,压盘5通过螺纹与活塞杆3连接,压盘5通过第一螺栓8与顶板4连接。
  2. 根据权利要求1所述的一种精确可调式可控震源振动器平板预应力结构的使用方法,其特征在于加载预应力时,首先将上顶板和四个导柱通过螺栓刚性连接,通过旋转压盘调整压盘和顶板间的间隙,由于螺纹的螺距是2mm,压盘上有12个螺栓相当于把压盘12等分,也就是说最小调整间隙是1/6mm,当调整到合适间隙后,把压盘上的12个螺栓上紧整个结构的预应力就建立起来了。
  3. 根据权利要求1所述的一种精确可调式可控震源振动器平板预应力结构的使用方法,其特征在于在地震勘探领域,采用均匀可调式可控震源振动器平板预应力结构。
PCT/CN2015/086660 2015-08-11 2015-08-11 一种精确可调式可控震源振动器平板预应力结构及使用方法 WO2017024527A1 (zh)

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CN201580002811.8A CN107076866B (zh) 2015-08-11 2015-08-11 一种精确可调式可控震源振动器平板预应力结构及使用方法

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CN107526100A (zh) * 2017-08-02 2017-12-29 中国石油天然气集团公司 振动器的预应力结构

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CN111856553B (zh) * 2019-04-29 2023-11-28 中国石油天然气集团有限公司 可控震源原地转向装置及方法

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US20110198147A1 (en) * 2010-02-18 2011-08-18 Conocophillips Company Seismic transducers having improved polygonal baseplates and methods of use
US20120048641A1 (en) * 2010-08-30 2012-03-01 Conocophillips Company Baseplate dampening pad
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