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Spiral grinding pump of continuous offshore fracturing fluid blending device

A fracturing fluid and spiral technology, applied in the field of grinding pumps, can solve problems such as the inability to realize continuous mixing of fracturing fluids, achieve rapid online grinding operations, and improve work efficiency

Inactive Publication Date: 2014-03-12
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, when fracturing operations are performed in offshore oilfields, fracturing fluids are mixed in batches in advance, but this method cannot achieve continuous mixing of fracturing fluids

Method used

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  • Spiral grinding pump of continuous offshore fracturing fluid blending device
  • Spiral grinding pump of continuous offshore fracturing fluid blending device

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Embodiment Construction

[0015] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0016] like figure 1 As shown, the screw grinding pump of the present invention includes a pump shaft 1 and a pump casing 2 set outside the pump shaft 1 . Both the pump spindle 1 and the pump housing 2 are connected to an external driving device (not shown in the figure). One end of the pump mandrel 1 and one end of the corresponding pump housing 2 form a pump inlet, and the other end of the pump mandrel 1 and the other end of the corresponding pump housing 2 form a pump outlet.

[0017] In the above embodiments, the pump spindle 1 includes a central shaft 11 and helical external threads 12 provided on the outer surface of the central shaft 11 at equal intervals or with gradually changing pitches. The inner surface of the pump housing 2 is provided with helical internal threads 21 at equal intervals or gradually changing pitches, the length of the h...

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Abstract

The invention relates to a spiral grinding pump of a continuous offshore fracturing fluid blending device. The spiral grinding pump is characterized by comprising a pump mandrel and an outer pump shell sleeved outside the pump mandrel, wherein a pump inlet is formed by one end of the pump mandrel and the corresponding end of the outer pump shell; a pump outlet is formed by the other end of the pump mandrel and the other corresponding end of the outer pump shell; the pump mandrel comprises a central shaft and outer spiral threads at equal intervals or gradient intervals in the outer surface of the central shaft; inner spiral threads at equal intervals or gradient intervals are formed in the inner surface of the outer pump shell; the length of each outer spiral thread is corresponding to that of each inner spiral thread; the rotational direction of the outer spiral threads is opposite to that of the inner spiral threads. According to practical working demands, multi-stage bidirectional spiral grinding pumps can be connected in parallel or in series, and fracturing fluid material grains can be ground in a bidirectional spiral mode, so that the spiral grinding pump can be widely applied to the process that a grain material is ground.

Description

technical field [0001] The invention relates to a grinding pump, in particular to a screw grinding pump used in a continuous mixing device for offshore fracturing fluid. Background technique [0002] The development of low-permeability oil and gas fields mainly adopts hydraulic fracturing technology to reform oil layers. At present, the technology for fracturing operations in onshore oil fields is relatively mature. The key to the success of fracturing operations depends largely on the quality of fracturing fluid. The main method to improve the quality of fracturing fluid is to improve the performance of thickener and improve the mixing process. In recent years, a lot of energy has been invested in the study of thickeners in order to improve the performance of thickeners. After 2003, the performance of mixing devices used on land has also been greatly improved. gradually applied. However, for the development of offshore low-permeability oil and gas fields, due to factors s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B02C19/22
Inventor 姜伟付英军刘书杰王杏尊刘刚芝
Owner CHINA NAT OFFSHORE OIL CORP
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