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Progressive cavity pump ground-driven slip-preventing device

An anti-detachment device and oil well pump technology, which is applied in the direction of drill pipe, drilling equipment, earthwork drilling, etc., can solve the problems of well site accidents, slips detachment, slips running up, etc., so as to achieve simple modification and prevent slips from going up The effect of breaking away from the main shaft and preventing accidents at the well site

Active Publication Date: 2009-06-03
TIANJIN LILIN GASOLINEEUM MACHINERY
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0002] In the existing technology, such as figure 2 and image 3 As shown, since the slips are clamped downwards on the upper end of the main shaft relying on gravity, when the downhole pressure is high or the pressure is unstable, the rotor in the screw pump often moves up and down, driving the sucker rod and the polished rod to move upward, resulting in stuck Slips often appear to slip upwards, and in severe cases, slips will slip upwards and break away from the drive of the main shaft, resulting in accidents at the well site

Method used

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  • Progressive cavity pump ground-driven slip-preventing device
  • Progressive cavity pump ground-driven slip-preventing device
  • Progressive cavity pump ground-driven slip-preventing device

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Embodiment Construction

[0010] The present invention will be further described below in conjunction with the accompanying drawings.

[0011] like figure 1 As shown, in the ground-driven slip prevention device of the screw oil well pump related to the present invention, two symmetrically arranged hooks (5) are fixed on both sides of the slips (6), and are respectively arranged on the symmetrical sides of the upper end of the main shaft (4). There are grooves (3), and the hook ends of the two hooks (5) are locked in the corresponding grooves (3).

[0012] In the embodiment of the present invention, the two hooks (5) are fixed on both sides of the slips (6) by fastening bolts (2).

[0013] The above description is only an embodiment of the present invention, and may not be used to limit the protection scope of the present invention.

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Abstract

The invention relates to a progressive cavity pump ground-driven slip-preventing device, two symmetrically-arranged hooks are fixed on two sides of the slip, trenches are respectively provided on two symmetrical sides of an upper end of a spindle, ends of the two hooks are clipped within the corresponding trenches, the technical proposal can not only prevent effectually the slip from jumping upwards to disengage from the spindle, but also avoid well field accidents caused therefrom, the device is substantially unchanged in original designed structure, modification thereof is simple and convenient, and the using effect is satisfactory.

Description

technical field [0001] The invention relates to a ground drive device for an oil well pump, in particular to a ground drive slip prevention device for a screw oil well pump. Background technique [0002] In the existing technology, such as figure 2 and image 3 As shown, since the slips are clamped downwards on the upper end of the main shaft relying on gravity, when the downhole pressure is high or the pressure is unstable, the rotor in the screw pump often moves up and down, driving the sucker rod and the polished rod to move upward, resulting in stuck Slips often appear upwards, and in severe cases, slips may escape from the drive of the main shaft and cause accidents at the well site. Contents of the invention [0003] The purpose of the present invention is to provide a ground-driven slip prevention device for screw pumps. This technical solution can not only effectively prevent the slips from slipping off the main shaft, but also eliminate the resulting accidents a...

Claims

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Application Information

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IPC IPC(8): E21B19/10
Inventor 王春生张金江孙会权
Owner TIANJIN LILIN GASOLINEEUM MACHINERY
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