Leakage prevention and stoppage tool for loess layer and using method of leakage prevention and stoppage tool

A loess layer and tool technology, which is applied in earth-moving drilling, wellbore/well components, sealing/packing, etc., can solve problems such as affecting drilling time efficiency, environmental pollution, etc., to solve drilling annulus leakage, avoid environmental pollution, simple structure

Pending Publication Date: 2019-12-31
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of easy well leakage when drilling into the loess layer, affecting the drilling timeliness and environmental pollution during the oil drilling process, the invention discloses a loess layer leakage prevention and plugging tool and its use method

Method used

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  • Leakage prevention and stoppage tool for loess layer and using method of leakage prevention and stoppage tool
  • Leakage prevention and stoppage tool for loess layer and using method of leakage prevention and stoppage tool
  • Leakage prevention and stoppage tool for loess layer and using method of leakage prevention and stoppage tool

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no. 1 approach

[0032] The first embodiment of the present invention relates to a loess layer leak prevention and plugging tool, as shown in Figure 1, at least including a pipe body 1 and a rubber sleeve assembly 2, a sliding Cover 3, as shown in Figure 2, the rubber cartridge assembly 2 at least includes a rubber cartridge 203, the two ends of the rubber cartridge 203 are respectively provided with an upper steel ring 201 and a lower steel ring 202, and the upper steel ring 201 is fixed On the upper part of the pipe body 1, the lower steel ring 202 is fixed on the lower part of the pipe body 1, and the lower steel ring 202 and the pipe body 1 are positioned by the shear pin 5; the sliding sleeve 3 can slide upward along the pipe body 1, After pushing the lower steel ring 202 to cut off the shear pin 5, continue to slide upward under pressure and squeeze the rubber tube 203, so that the rubber tube 203 is compressed in the axial direction, expanded in the radial direction, and contacts with th...

no. 2 approach

[0036] This embodiment relates to a leak-proof and plugging tool for loess layers, which includes a pipe body 1, and a rubber sleeve assembly 2 and a sliding sleeve 3 that are sequentially sleeved on the pipe body 1 from top to bottom, such as figure 2 As shown, the rubber cartridge assembly 2 includes an upper steel ring 201, a lower steel ring 202, a rubber cartridge 203 and a spring leaf 204, and the upper steel ring 201 and the lower steel ring 202 are respectively arranged on the upper and lower sides of the rubber cartridge 203. Both ends, and the upper steel ring 201 and the pipe body 1 are fixed with bolts, the lower steel ring 202 and the pipe body 1 are positioned by the shear pin 5, and the lower steel ring 202 and the sliding sleeve 3 are in gapless contact. The sliding sleeve 3 can slide upward along the pipe body 1, push the lower steel ring 202 to cut the shear pin 5, and then continue to slide upward under the action of pressure to form enough pressure on the r...

no. 3 approach

[0043] This embodiment provides a loess layer leak prevention and plugging tool, such as figure 1 As shown, it includes a pipe body 1 and a rubber sleeve assembly 2 and a sliding sleeve 3 that are sequentially sleeved on the pipe body 1 from top to bottom. The pipe body 1 is also provided with a limit bolt 4, such as figure 2 As shown, the rubber cartridge assembly 2 includes an upper steel ring 201, a lower steel ring 202, a rubber cartridge 203 and a spring leaf 204, and the upper steel ring 201 and the lower steel ring 202 are respectively arranged on the upper and lower sides of the rubber cartridge 203. Both ends, and the upper steel ring 201 and the pipe body 1 are fixed with bolts, the shear pin 5 is set between the lower steel ring 202 and the pipe body 1, and there is no gap between the lower steel ring 202 and the sliding sleeve 3 , the sliding sleeve 3 can slide up and down along the pipe body 1, and the sliding sleeve 3 is limited by the stop bolt 4 when it goes d...

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Abstract

The invention relates to a leakage prevention and stoppage tool for a loess layer and a using method of the leakage prevention and stoppage tool. The leakage prevention and stoppage tool at least comprises a pipe body and further comprises a rubber cylinder assembly and a sliding sleeve which are sequentially arranged on the pipe body in a sleeving mode from top to bottom; and an upper steel ringand a lower steel ring are arranged at the two ends of the rubber cylinder assembly correspondingly, the upper steel ring is fixed to the upper part of the pipe body, a shear pin is arranged between the lower steel ring and the lower part of the pipe body, when the lower pressure is greater than the bearing capacity of the shear pin, the shear pin is sheared off, the sliding sleeve moves upwards,and thus the sliding sleeve is extruded axially. During using, the leakage stoppage tool is connected with a guide pipe string entering a well to be lowered into a loess borehole, after the guide pipestring reaches the well bottom, the sliding sleeve makes contact with the well bottom, guide pipes downwards press the sliding sleeve through the self weight, the shear pin is sheared off, and the guide pipe string continues moving downwards to extrude a rubber cylinder; and the rubber cylinder is compressed in the axial direction and expanded in the radial direction to make contact with the wellwall so as to be sealed. According to the using method, an annulus between the guide pipe string and the borehole in the loess layer is reliably packed and blocked at the well bottom, so that duringsubsequent drilling, circulating drilling fluid does not make contact with the loess layer, and the leakage prevention and stoppage effects are achieved.

Description

technical field [0001] The invention belongs to the field of oil drilling tools, and in particular relates to a loess layer leakage prevention and plugging tool and a use method thereof. Background technique [0002] In land oil drilling construction, during the process of drilling into the surface loess layer, the drilling fluid is seriously lost due to loose soil and pores, resulting in formation water washing pollution and low drilling efficiency. How to prevent this loss with high efficiency and low cost, ensure environmental protection, pollution-free, high-efficiency, and quickly drill the loess layer. For a long time, the industry has been committed to improving tools, techniques, and methods, but has not yet found an internationally recognized method. A reliable and low-cost technical method or tool for leakage plugging commonly used. [0003] At present, the technical measures used in the actual drilling construction mainly include: cement sealing, small displaceme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/128E21B33/127
CPCE21B33/128E21B33/127
Inventor 宋顺平武立王伟良张盘龙杨森丛成朱建武何璟彬陈伟林陈霖李冠英白秀丽赵莹侍德益李沛轩李莉
Owner BC P INC CHINA NAT PETROLEUM CORP
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