Downhole double-pipe sliding self-sealing tool
A technology of tools and oil pipes, which is applied in the field of downhole double-pipe sliding self-sealing tools, can solve the problems of sand stuck in pipe strings, sand bridges, incomplete well washing, low gravel packing efficiency, etc., and achieve reliable sealing and good separation effect
Active Publication Date: 2022-07-01
DONGYING FLUID SCI & TECH
View PDF11 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0002] At present, in the sand control technology of one-time multi-layer gravel packing completion of a single well, due to the different formation pressure and leakage rate of each layer, it is easy to cause sand bridges and incomplete well washing during gravel packing and backwashing operations, resulting in gravel packing Low efficiency, sand stuck in pipe string due to failure of well flushing
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0024] Please also refer to Figure 1-Figure 5 , wherein the downhole double-pipe sliding self-sealing tool includes a centralizing device 100, a sealing device 200, a suspension device 300 and an oil pipe 9, the sealing device 200 is connected and installed at one end of the centralizing device 100, and the suspension device 300 is connected and installed At one end of the sealing device 200 , the oil pipe 9 is installed inside the s...
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
Login to View More Abstract
The invention belongs to the technical field of petroleum engineering, and discloses an underground double-pipe sliding self-sealing tool, which comprises a centering device, a sealing device, a suspension device and an oil pipe. The sealing device is connected and installed at one end of the centralizing device, the suspension device is connected and installed at one end of the sealing device away from the centralizing device, and the oil pipe is sleeved and installed on the sealing device and the suspension device internal. The downhole double-pipe sliding self-sealing tool of the invention can be run together with the sand control service tool, or can be prefabricated in the tool in advance; the separation effect is good, the upper and lower formation sections are effectively separated, and it is not disturbed by other layers; The sealing effect is more reliable as the downhole pressure increases; it can seal various specifications of non-coupling tubing, and realize the conversion of various specifications and sizes.
Description
technical field [0001] The invention relates to the technical field of petroleum engineering, in particular to an underground double-pipe sliding self-sealing tool. Background technique [0002] At present, in the sand control process using one-time multi-layer gravel-packing completion in a single well, due to the different formation pressures and leakage rates of each layer, sand bridges and incomplete well cleaning are easily caused during gravel packing and backwashing operations, resulting in gravel packing. The efficiency is low, and the well flushing fails, and the sand is stuck in the string. In order to ensure the effect of gravel packing and well backwashing, the sand-carrying fluid and the well-flushing fluid form an independent space without interfering with the liquid and pressure of other formations, and a downhole double-pipe sliding self-sealing tool is especially required for separation. During construction, the downhole double-pipe sliding self-sealing too...
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
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): E21B23/01E21B17/10E21B33/12E21B41/00
CPCE21B17/1078E21B23/01E21B41/00E21B33/12
Inventor 刘淑静焦青青许腾飞王威罗卫刘国滨赵飞飞王宜凯于雷
Owner DONGYING FLUID SCI & TECH