Set milling integrated sand bailing device and application method thereof

A technology of sleeve milling and outer sleeve, which is applied in earth-moving drilling, wellbore/well components, etc., can solve the problems of serious sand sticking in the well, affecting the production cycle, etc., and achieve the effect of high transportation efficiency and strong transportation capacity.

Pending Publication Date: 2019-12-13
北京三叶西蒙科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The sand stuck in the mechanical production well is serious, which seriously affects the production cycle

Method used

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  • Set milling integrated sand bailing device and application method thereof
  • Set milling integrated sand bailing device and application method thereof
  • Set milling integrated sand bailing device and application method thereof

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with the accompanying drawings.

[0020] as attached Figure 1~6 The shown casing-milling integrated sand fishing device and its usage method: it includes an outer sleeve 1 and a central rotating shaft 2, the central rotating shaft 2 is sleeved in the outer sleeve 1, and the top end of the central rotating shaft 2 A screw motor 6 is arranged at the position, and a mud channel 22 is arranged at the middle part of the central rotating shaft 2, and the outlet of the screw motor 6 communicates with the mud channel 22; an upper joint 7 is arranged above the screw motor 6, and the upper A feed chamber 71 is provided in the joint 7, and the feed chamber 71 is communicated with the inlet of the screw motor 6; by pressing the mud liquid into it from the feed chamber of the upper joint, the mud liquid will press the hydraulic pressure at the screw motor. Converted into mechanical energy, so as to ensure the rot...

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Abstract

The invention discloses a set milling integrated sand bailing device and an application method thereof. The set milling integrated sand bailing device comprises an outer sleeve and a central rotatingshaft, the central rotating shaft is sleeved in the outer sleeve, a rock debris lifting channel is formed between the inner wall of the outer sleeve and the central rotating shaft, and spiral blades are arranged on the outer surface of the central rotating shaft; and the inner side of the outer sleeve is provided with a debris storage cavity. According to the set milling integrated sand bailing device, the bottom rock debris is transported into the debris storage cavity through the rock debris lifting channel through the spiral blades; and compared with other conveying modes, the mode that thespiral blades 21 are used to convey the rock debris is strong in rock debris carrying capacity, and the carried rock debris is more, so that the sand bailing efficiency of the device is improved, andthe rock debris at the bottom inside an oil well can be cleaned in time.

Description

technical field [0001] The invention relates to the technical field of oil well sand fishing, in particular to an integrated casing milling sand fishing device and a method for using the sand fishing device. Background technique [0002] The Halahatang, Hade and Tahe oilfield blocks in the Tarim Basin of Xinjiang are mainly the Devonian and Ordovician strata. The layers in this section are dominated by mudstone and limestone, the diameter expansion rate of the upper section is relatively large, and the well wall is easy to lose blocks, and the Ordovician limestone in the lower section is easy to collapse. The buried depth of the oil reservoir is 6650-7000m, and the formation fluid generally contains high hydrogen sulfide. During the turnaround operation, turnaround pumping, and inspection pumping operations, it was found that the formation had serious sand production. The open-hole production layer collapsed due to well wall, serious sand production, and serious sand burial...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B27/04
CPCE21B27/04
Inventor 常宝平
Owner 北京三叶西蒙科技有限公司
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