Soluble fracturing ball manufacturing method used for staged fracturing of shale gas well
A technology for staged fracturing and shale gas wells, used in earth-moving drilling, wellbore/well components, production fluids, etc.
Inactive Publication Date: 2018-03-06
郭强
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[0003] The purpose of the present invention is to propose a method for making soluble pressure-suppressing balls used in staged fracturing of shale gas wells, so as to solve the problem in the prior art that flowback or milling of pressure-suppressing balls is required during staged fracturing, and to realize pressure-suffocating The pressure ball can be controlled and dissolved in the downhole environment
Aiming at the problem in the prior art that flowback or milling pressure-suppressing balls are required during staged fracturing, the present invention provides a method for making soluble pressure-suffocating balls used in staged fracturing of shale gas wells. The pressure-suppressing ball can meet the requirements of high-pressure resistance and dissolvability, and realize the purpose of the controllable dissolution of the pressure-suppressing ball in the downhole environment
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Embodiment 1
[0021] Such as figure 1 Shown is a method for making soluble pressure-suffocating balls used in staged fracturing of shale gas wells. The method includes the following steps: (a) using metal magnesium powder with a grain diameter between 60 and 100 μm as a nuclei crystal ( 1) Al or / and Al with a grain diameter of 10 μm 2 o 3 The powder is used as the shell crystal (2), and the core-shell coating is carried out to obtain a composite powder; (b) the β-phase metal powder (3) is added to the composite powder and mixed uniformly; (c) the alloy forming agent is added and mixed until uniform, and the The powder is placed in the mold and pressed into shape; (d) Heating the pressed body to 400~600°C in a vacuum heating furnace, and then cooling to room temperature to obtain the finished green body material; (e) The completed green body The green body material is made into a spherical shape. In this embodiment, the finite element analysis is carried out on the 38.1mm-diameter pressur...
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Abstract
The invention discloses a soluble fracturing ball manufacturing method used for staged fracturing of a shale gas well. According to the method, metal Mg powder with the grain diameter of 60-100 microns serves as nuclear body crystals, and Al or / and Al2O3 powder with the diameter of 10 microns serves as shell crystals; beta-phase metallic elements are added and mixed evenly; pressing molding is conducted; blanks are heated in a vacuum heating furnace to 400-600 DEG C, cooled to the indoor temperature and then cut and ground into balls, and then fracturing balls capable of being gradually dissolved in a well can be obtained. The manufacturing method is provided for solving the problems that flow-back is needed or fracturing balls need to be ground and milled during staged fracturing in the prior art, and the purpose that fracturing balls can be controllably dissolved in a subsurface environment is achieved.
Description
technical field [0001] The invention relates to the field of petroleum and natural gas exploration and development, in particular to a method for manufacturing a soluble pressure-suffocating ball used in staged fracturing of shale gas wells. Background technique [0002] In shale oil and gas, low-permeability reservoir directional well, horizontal well fracturing and stimulation process, multi-stage sliding sleeve staged fracturing technology is often used. The ball-throwing fracturing sleeve is the key workpiece in the staged fracturing technology. The pressure-suppressing balls with diameters ranging from small to large are sequentially dropped into the wellhead, and the sliding sleeves of each stage are opened in turn, and then the subsequent fracturing operation is carried out. After the fracturing of all production layers is completed, the pressure-holding ball will return to the wellhead under the action of the formation pressure. If the flow-back is not smooth, the ba...
Claims
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Patent Timeline
Login to View More IPC IPC(8): B22F3/02B22F3/10B22F1/02E21B43/26
CPCE21B43/26B22F3/02B22F3/1007B22F1/17B22F1/16
Inventor 郭强
Owner 郭强