An integrated isolation and packing tool for sand control and well completion

A technology of sand control and tools, which is applied in the directions of sealing/isolation, production fluid, flushing of wellbore, etc., can solve the problems of high one-time investment cost, single function of process string, and influence on filling quality, etc., and achieve flexible and reliable opening and closing, The effect of expanding the seepage area and reducing the construction cost

Active Publication Date: 2022-06-24
山东普瑞思德石油技术有限公司
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are also problems such as complex construction, high one-time investment cost, single function of the process string, and the need to run multiple process strings in one operation.
At the same time, during the gravel packing operation, the sand-carrying fluid is likely to generate eddy current erosion at the filling hole of the filling tool, resulting in damage to the filling hole, affecting the filling quality and reducing the productivity of the oil well
[0004] Chinese patent CN212508227U discloses a segmented gravel packing device for open-hole horizontal wells, which relates to the field of oil well sand control technology, including wellhead casing, grading hoop, downhole casing, tubing, first screen pipe, second-stage packing tool, and second-stage service tool , hydraulic packer, second screen, bottom service tool and bottom packing tool, bottom packing tool, second screen, hydraulic packer, second stage packing tool, first screen, downhole casing, grading hoop and The wellhead casing is fixedly connected sequentially from bottom to top; the second-stage service tool and the bottom service tool are slidingly connected with the second-stage filling tool and the bottom filling tool respectively, and the tubing is connected in series with the second-stage service tool and the bottom service tool; The pipe string needs to be lowered multiple times, and the construction steps are cumbersome

Method used

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • An integrated isolation and packing tool for sand control and well completion
  • An integrated isolation and packing tool for sand control and well completion
  • An integrated isolation and packing tool for sand control and well completion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] refer to Figure 1-2 As shown, an integrated isolation and filling tool for sand control and completion includes an upper joint 1, a sealing assembly, a filling assembly and a lower joint 27, as well as a backwashing assembly and a central pipe I5, an upper joint 1, a backwashing assembly, a central pipe I5. The filling assembly and the lower joint 27 are fixedly connected in sequence from top to bottom, and the sealing assembly is sleeved on the outside of the central pipe I5;

[0034] refer to Image 6 As shown, the filling assembly includes a connecting collar 14, a central tube II 15, an outer spring 17, a long sheath 19, a filter ring 20, a sealing sleeve 21, a filling sleeve 24, a ball seat 25 and an inner spring 26, and the connecting collar 14 is fixedly installed At the lower end of the central pipe I5, it is fixedly connected with the central pipe II15, the sealing sleeve 21, the filling sleeve 24 and the lower joint 27 in sequence from top to bottom; such as...

Embodiment 2

[0042] As a preferred embodiment of the present invention, this embodiment adds an anti-erosion inner ring 23 in the filling sleeve 24 on the basis of the first embodiment, specifically:

[0043] refer to Image 6 and Figure 8 As shown, in this embodiment, the inner wall of the filling sleeve 24 inside the filling hole 28 is provided with an anti-erosion inner ring 23, and the material of the anti-erosion inner ring 23 is a high-strength alloy with high impact resistance.

[0044] The anti-erosion inner ring 23 inside the filling hole 28 is made of high-strength alloy material. The filling hole 28 adopts a scientific flow angle, which can reduce the eddy current erosion during the filling operation, and can withstand the maximum displacement of 5.5 cubic meters per minute and the highest sand ratio. 70% fracturing and filling operations with a maximum pressure of 35MPa and a maximum sand volume of 120 cubic meters.

Embodiment 3

[0046] As a preferred embodiment of the present invention, this embodiment optimizes the structure of the backwash assembly on the basis of the second embodiment, specifically:

[0047] refer to image 3 As shown, in this embodiment, the backwashing assembly includes a backwashing jacket 2, a backwashing sliding sleeve 4 and a return spring 3, the upper end of the backwashing jacket 2 is fixedly connected with the upper joint 1, and its lower end is fixedly connected with the central pipe I5; The backwashing sleeve 4 is slidably sealed in the inner cavity of the backwashing jacket 2, and a first annular space Y1 is formed between the two; The backwash jacket 2 on the upper part of the limit table is provided with a first through hole X1 that communicates with the first annular space Y1, the upper end of the return spring 3 is in contact with the lower part of the upper joint 1, and its lower end is in contact with the upper part of the backwash sliding sleeve 4 .

[0048] Du...

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

PUM

No PUM Login to view more

Abstract

The invention discloses an integrated pack-off and filling tool for sand control and well completion, which relates to the technical field of downhole operation tools for oil and gas wells, including an upper joint, a sealing assembly, a filling assembly and a lower joint, and also includes a backwashing assembly, a central pipe I, and an upper joint , backwash assembly, center pipe Ⅰ, filling assembly and lower joint are fixedly connected from top to bottom, and the sealing assembly is sleeved outside the center pipe Ⅰ; the backwash assembly is equipped with a return spring, which enhances the flexibility of backwash operations. Reliability; the filling component is equipped with a filter ring and an anti-erosion inner ring, which prolongs the service life of the integrated pack-off and fill tool; this device can be run in one trip without lifting the pipe string or running in other tools. Under normal circumstances, it can complete backwashing, setting, sealing, fracturing filling, circulating filling and production operations; compared with traditional operating tools, it can save more than half of the construction time and greatly reduce the construction cost.

Description

technical field [0001] The invention relates to the technical field of downhole operating tools for oil and gas wells, in particular to an integrated sealing and filling tool for sand control and completion. Background technique [0002] my country's unconsolidated sandstone reservoirs have a large distribution range, large reserves and important production. Under normal mining conditions, sand production in oil wells is extremely harmful. In order to prevent sand production in oil wells, according to the requirements of oil layers and production processes, corresponding sand control technology is adopted to ensure the normal production of oil wells. [0003] Gravel packing sand control technology is currently one of the most effective sand control methods for developing unconsolidated sandstone reservoirs at home and abroad. The sand control process has the advantages of high success rate, long validity period, wide adaptability and good sand control effect. However, ther...

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

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/04E21B33/122E21B21/10
CPCE21B43/04E21B33/122E21B21/10
Inventor 邢秀贵耿瑞琪吴海燕徐晓跃王玉婷孙锐杰刘智仁王鹏张玉涛
Owner 山东普瑞思德石油技术有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products