Float collar and rubber plug interlocking device and application method

A technology of interlocking device and rubber plug, which is used in earth-moving drilling, wellbore/well components, sealing/packing, etc., which can solve the problems of increasing the workload of drilling plugs of the well team and affecting the cementing quality.

Pending Publication Date: 2020-10-16
濮阳中原三力创高机械设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The formation of cement plugs greatly increases the workload of the drilling team, and at the same time leads to the loosening of part of the cement sheath in the well, which affects the cementing quality

Method used

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  • Float collar and rubber plug interlocking device and application method
  • Float collar and rubber plug interlocking device and application method
  • Float collar and rubber plug interlocking device and application method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Embodiment 1. The present invention includes a rubber plug 1, a lock groove body 2, a lock pin 3, a spoiler 4, a guide groove 5, a blocking plate 6, a spring 7, and a guide key 8. The lower part of the rubber plug 1 is provided with aluminum The lock groove body 2, the lock groove body 2 is concentric with the rubber plug 1 and vulcanized at high temperature as a whole; the upper part of the spoiler 4 is provided with four retractable lock pins 3, and the guide groove 5 is set in the installation hole of the lock pin 3 , the guide key 8 is set on the lock pin 3, and the lock pin 3 does not rotate in the radial direction, thereby ensuring that the arc surface of the lock pin 3 is always upward and improving reliability; after four sets of lock pins 3 and springs 7 are installed in the hole, the blocking plate 6 Weld it on the spoiler 4 to form a new spoiler assembly, and then install the spoiler assembly into the floating hoop.

Embodiment 2

[0013] Embodiment 2, the upper part of the inner hole of the spoiler 4 is provided with R4 rounded corners, and the outer circle of the lower part of the lock tank body 2 is provided with a 15° conical surface, which is convenient for entering the spoiler 4 .

Embodiment 3

[0014] Embodiment 3, the upper part of the lock pin 3 is an R25 arc surface 10, which is convenient for the rubber plug lock groove body 2 to enter, and the lower part of the lock pin 3 is a straight face 9, which can prevent the lock pin 3 from retracting when the lower pressure increases, resulting in interlock failure Phenomenon.

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PUM

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Abstract

The invention discloses a float collar and rubber plug interlocking device and an application method, and relates to an oil and gas well cementation technology. The defects of other technologies at present can be overcome. The float collar and rubber plug interlocking device has the structural relation that an aluminum lock groove body is formed in the lower part of a rubber plug, and the lock groove body and the rubber plug are concentric and are vulcanized into a whole at high temperature; four telescopic lock pins are arranged at the upper part of a spoiler, guide grooves are formed in lockpin mounting holes, guide keys are arranged on the lock pins, and the lock pins do not rotate in the radial direction, so that the arc surfaces of the lock pins are always upward, and the reliabilityis improved; and after the four lock pins 3 and springs are installed in the holes, a blocking plate is welded to the spoiler to form a new spoiler assembly, and then the spoiler assembly is installed in a float collar.

Description

technical field [0001] The invention relates to the cementing technology of oil and gas wells, in particular to an interlocking device and an application method of a floating hoop and a rubber plug. Background technique [0002] During the cementing construction of oil and gas wells, after the rubber plug is bumped, it can be judged whether the sealing performance of the floating hoop check valve is effective by observing the pressure fluctuation of the displacement fluid. If there is no displacement fluid gushing out, it proves that its sealing is reliable. At this time, there is no need to hold the pressure and wait for setting, so the cement head is removed, wait for setting, and prepare for the casing pressure test. However, due to the change of temperature and pressure at the bottom of the well, or the quality of the floating hoop check valve (which has been washed by a large displacement of cement slurry) and other factors, the sealing performance of the floating hoop ...

Claims

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Application Information

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IPC IPC(8): E21B33/13E21B33/134
CPCE21B33/13E21B33/134
Inventor 童胜利马玉斌廖正秋
Owner 濮阳中原三力创高机械设备有限公司
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