Borehole cleaning tool for horizontal-section gas drilling

A gas drilling and horizontal section technology, applied in construction and other directions, can solve the problems of changing the flow field, rare, and cannot well meet the cleaning of gas drilling horizontal wells, etc., to improve the ability to break cuttings and improve the ability to disturb the flow Effect
CN103775010AActive Publication Date: 2014-05-07SOUTHWEST PETROLEUM UNIV
9 Cites 10 Cited by

Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
SOUTHWEST PETROLEUM UNIV
Publication Date
2014-05-07

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a borehole cleaning tool for horizontal-section gas drilling. The borehole cleaning tool consists of a main body, spiral flow channels, alloy teeth and joints, wherein two ends of the main body are the joints; the spiral flow channels are located in the main body; the spiral flow channels comprise a front spiral flow channel which takes up one third of the length of the spiral flow channel and a rear spiral flow channel which takes up two thirds of the length of the spiral flow channel; unequal-diameter alloy teeth are respectively embedded into the strengthening bars of the front spiral flow channel and the rear spiral flow channel; an inclined U-shaped groove of which the cross section is 2cm to 4cm deep is formed in the rear spiral flow channel. According to the borehole cleaning tool, as the spiral flow channels which are of a composite structure respectively are adopted, the flow speed of gas is increased, and the orbiting flow of an annular air body is enhanced; the windward sides of the spiral flow channels are respectively provided with the inclined U-shaped groove, so that a great deal of rock waste is annularly hoisted in the sky; as the different-size alloy teeth are respectively embedded into the strengthening bars of the spiral flow channels, the grinding of rock waste in rotation is enhanced; the borehole cleaning tool is reliable in principle, rational in structure, and applicable for a horizontal borehole drilling technology under the working conditions of gas drilling and fluid drilling, thereby having a broad market prospect.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a tool for purifying the borehole of a horizontal well during the drilling process in the field of petroleum engineering. Background technique

[0002] When drilling wells with large inclination angles such as highly deviated wells, horizontal wells, and extended-reach wells, it is easy to have difficulties in cuttings migration downhole, and cuttings will be retained and accumulated in the lower side of the wellbore, forming a certain length Debris bed. The formation of the cuttings bed increases the drilling torque, makes it difficult to apply the drilling pressure and even causes the danger of the drill sticking, which leads to the inability of the drilling to proceed smoothly, resulting in huge economic losses.

[0003] In order to solve the formation of the cuttings bed, there are currently some tools for removing the cuttings bed, but their functions are not very satisfactory: the vortex cleaning drill pipe disclosed in ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More