Compressed packer rubber barrel with spacer ring combined spring shoulder pad

A compression packer and composite spring technology, which is used in sealing/packing, wellbore/well components, earth-moving drilling, etc. Recycling and other issues to achieve the effect of meeting high temperature, high pressure and deformation resistance

Inactive Publication Date: 2015-03-04
CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD CHANGQING DOWNHOLE TECH CO +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the problem that the current compression packer rubber sleeve cannot meet the needs of high temperature, high pr

Method used

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  • Compressed packer rubber barrel with spacer ring combined spring shoulder pad
  • Compressed packer rubber barrel with spacer ring combined spring shoulder pad
  • Compressed packer rubber barrel with spacer ring combined spring shoulder pad

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] like image 3 The rubber sleeve of a composite spring shoulder compression packer with a spacer ring shown includes a rubber sleeve body, which is a combined structure of three rubber sleeves, including two side rubber sleeves 3 and a middle rubber sleeve 4. The middle rubber tube 4 is located between the two side rubber tubes 3, and the two ends of the middle rubber tube 4 are separated from the side rubber tubes 3 by a spacer ring 5, and the side rubber tube 3 and the middle rubber tube 4 are respectively It is in close contact with the spacer ring 5; the structure of the rubber cylinder body is a combined structure of three rubber cylinders with spacers, and the structure of the rubber cylinder is a three-stage sealing structure. When working, even if the single-stage seal fails, the other two sections can also work. To effectively seal the role. The shoulders of the two side rubber tubes 3 are respectively provided with multi-layer spirals for protecting the should...

Embodiment 2

[0026] On the basis of Embodiment 1, the multi-layer coil spring ring includes an outer coil spring ring 1 and an inner coil spring ring 2 sleeved in the outer coil spring ring 1, as figure 1 , figure 2 As shown, its structure is that a small cylindrical helical spring is placed in a large helical spring, and the head and tail ends of the inner and outer helical springs are respectively welded by a special process to form a ring (welding points 10 such as figure 1 shown in ), the ring can radially expand and contract; the number of inner helical spring rings 2 in this embodiment is at least one. The multi-layer helical spring ring is inlaid on the shoulder of the side rubber tube 3 and vulcanized into one with the side rubber tube 3, the rubber penetrates into the inside of the spring, and the spring plays the role of strengthening the rubber strength, as image 3 shown. The multi-layer helical spring ring can expand with the expansion of the rubber tube, and bear the p...

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Abstract

The invention specifically provides a compressed packer rubber barrel with a spacer ring combined spring shoulder pad. the compressed packer rubber barrel is characterized in that a rubber barrel body comprises two side rubber barrels, and a medium rubber barrel positioned between the two side rubber barrels; two ends of the medium rubber barrels are respectively separated and in close contact with the side rubber barrels through a spacer ring; multi-layer circular spiral spring rings are respectively arranged at the shoulder parts of the two side rubber barrels and used for being radially expanded along the rubber barrel body to protect the shoulder parts of the side rubber barrels when an opposite axial extruding force is applied to the rubber barrel body. According to the compressed packer rubber barrel with the spacer ring combined spring shoulder pad, the multi-layer spiral springs can effectively protect the shoulder parts of the rubber barrel body; when in setting packing, the multi-layer spiral spring is expanded to block an a ring space to prevent the rubber barrels from being extruded; the multi-layer spiral spring is retracted under the tension force of the spring when releasing the packing and recovering; therefore, the problem of difficult retracting of the general rubber barrels can be avoided; in case that one section is failed in sealing when the rubber barrel body works, the other two sections can perform effective sealing; the compressed packer rubber barrel is high in bearing capacity and deformation resistance, and cam meet the requirements on high temperature, high pressure, and releasing and recovering.

Description

technical field [0001] The invention relates to the technical field of downhole tools for fracturing construction in oil and gas fields, in particular to a composite spring shoulder compression packer rubber cylinder with spacer rings. Background technique [0002] The compression packer is an important downhole operation tool for reservoir reconstruction and production in oil and gas fields. The rubber sleeve is the core component of the packer, and the performance of the rubber sleeve directly affects the performance of the packer. When the compression packer is working, its rubber tube will be squeezed and expanded, and there is a lot of extrusion stress inside. Since the upper and lower shoulders of the rubber tube (the part in contact with the rubber tube seat is called the shoulder) are squeezed, stress will be squeezed into the annulus. When the stress is greater than the shear force of the rubber tube rubber, the rubber tube will be crushed. tearing, especially in...

Claims

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Application Information

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IPC IPC(8): E21B33/122
CPCE21B33/122
Inventor 梁陇霞隆琴君苏敏文王芳远隆世明徐红米虎宁汤亮郝兰香邱宗斌王琦王涛
Owner CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD CHANGQING DOWNHOLE TECH CO
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