CN106482934B - Reverse circulation downhole tool opening pressure testing device and method - Google Patents
Reverse circulation downhole tool opening pressure testing device and method Download PDFInfo
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- CN106482934B CN106482934B CN201510539732.2A CN201510539732A CN106482934B CN 106482934 B CN106482934 B CN 106482934B CN 201510539732 A CN201510539732 A CN 201510539732A CN 106482934 B CN106482934 B CN 106482934B
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- sealing ring
- downhole tool
- reverse circulation
- outer cylinder
- pressure testing
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Abstract
the invention discloses a reverse circulation downhole tool opening pressure testing device and a reverse circulation downhole tool opening pressure testing method. The upper end of the outer barrel is provided with an upper sealing ring and is fixed by pressing and buckling an upper sealing ring pressing cap, and the lower end of the upper sealing ring pressing cap is in threaded connection with the outer barrel. The lower end of the outer cylinder is provided with a lower sealing ring and is fixed by pressing and buckling a lower sealing ring pressing cap, and the upper end of the lower sealing ring pressing cap is in threaded connection with the outer cylinder. Sealing rings are arranged between the outer walls of the upper end and the lower end of the outer cylinder and the upper sealing ring and between the outer wall of the upper end and the lower sealing ring and the upper sealing ring and the lower sealing ring when the reverse circulation downhole tool penetrates through the upper sealing ring and the lower sealing ring. An annulus is formed between the outer barrel and the reverse circulation downhole tool. The invention solves the problems of large workload and low working efficiency in the prior art by adopting a conventional test mode.
Description
Technical Field
The invention relates to a device for detecting the performance of a reverse circulation downhole tool of an oil-gas well; in particular to a device and a method for testing the opening pressure of a reverse circulation downhole tool.
Background
At present, for the development of a plurality of low-permeability oil and gas reservoirs, modification measures such as fracturing, acidizing and the like are generally required, a packer process pipe column is mostly adopted, and measures such as reverse circulation well flushing and the like are required under the conditions of difficulty in deblocking or sand blockage in the fracturing process, so that an underground tool meeting the requirements of reverse circulation well flushing is required on the upper portion of the pipe column. For the production pipe column of the deep oil-gas well, sometimes a protective sleeve is needed, a packer production pipe column needs to be adopted, and the upper part of the pipe column also needs a reverse circulation channel. The reverse circulation downhole tool is a very important component of the process string, and the working performance of the reverse circulation downhole tool directly influences the success or failure of the process measures. Therefore, there is a need for comprehensive indoor performance testing of such downhole tools prior to downhole. The reverse circulation downhole tool opening pressure is a very important technical parameter of the tool, the tool needs to be tested after being assembled, at present, no special testing device exists, the testing of the technical parameter is still more complicated, the reverse circulation downhole tool is generally required to be connected to a test oil pipe nipple and is placed into a test casing, the oil casing annulus and the interior of a test pipe column can only be communicated through a reverse circulation downhole tool circulation channel through a special joint from top to bottom, during testing, the annular pressure is applied through the annulus, when the pressure reaches the reverse circulation downhole tool opening pressure, the oil casing is communicated, and the testing of the tool opening pressure is completed. This kind of test mode, equipment before and after the test and dismantle work load great, if detect when the task volume is great, work efficiency is lower, can't satisfy easy operation, efficient work demand.
disclosure of Invention
The invention aims to provide a device and a method for testing the opening pressure of a reverse circulation downhole tool, and solves the problems of large workload and low working efficiency in the prior art by adopting a conventional testing mode.
In order to achieve the purpose, the invention adopts the following technical scheme that the reverse circulation downhole tool starting pressure testing device comprises an outer cylinder, wherein a pressure testing joint is radially arranged on the outer cylinder, a central hole of the pressure testing joint is communicated with an inner cavity of the outer cylinder, and the inner diameter of the outer cylinder is larger than the outer diameter of the reverse circulation downhole tool.
The upper end of the outer barrel is provided with an upper sealing ring and is fixed by pressing and buckling an upper sealing ring pressing cap, and the lower end of the upper sealing ring pressing cap is in threaded connection with the outer barrel.
The lower end of the outer cylinder is provided with a lower sealing ring and is fixed by pressing and buckling a lower sealing ring pressing cap, and the upper end of the lower sealing ring pressing cap is in threaded connection with the outer cylinder.
Sealing rings are arranged between the outer walls of the upper end and the lower end of the outer cylinder and the upper sealing ring and between the outer wall of the upper end and the lower sealing ring and the upper sealing ring and the lower sealing ring when the reverse circulation downhole tool penetrates through the upper sealing ring and the lower sealing ring.
An annulus is formed between the outer barrel and the reverse circulation downhole tool.
A reverse circulation downhole tool opening pressure testing method comprises the steps of sleeving a reverse circulation downhole tool opening pressure testing device on a reverse circulation downhole tool, enabling a pressure testing joint to be communicated with an outer circulation hole in an outer pipe of the reverse circulation downhole tool through an inner cavity of an outer cylinder, pressing an annulus between the testing device and the downhole tool through the pressure testing joint of the testing device, when pressure reaches shearing pressure of shear pins on a sliding sleeve of the downhole tool, the shear pins are sheared, pressure in the annulus pushes the sliding sleeve to move downwards and compress a spring, the sliding sleeve is opened, the shearing pressure of the shear pins is recorded, and testing of the reverse circulation downhole tool opening pressure is completed.
Compared with the prior art, the invention has the following beneficial effects:
The reverse circulation downhole tool opening pressure testing device adopts a symmetrical design, has a compact structure, is installed with a tested tool in a sleeved mode, and is convenient to install, simple to operate and high in working efficiency; the sealing structure and the outer barrel are designed in a split mode, the sealing structure can be replaced according to the outer diameter of the tool, and the sealing structure is suitable for testing the opening pressure of reverse circulation downhole tools with various outer diameter specifications.
Drawings
FIG. 1 is a schematic diagram of a reverse circulation downhole tool opening pressure testing apparatus;
FIG. 2 is a schematic view of the installation structure of the downhole tool opening pressure testing device during operation.
in the figure: 1-1 parts of upper sealing ring pressing caps, 1-2 parts of upper sealing rings, 1-3 parts of sealing rings, 1-4 parts of outer cylinders, 1-5 parts of pressure test connectors, 1-6 parts of lower sealing rings, 1-7 parts of lower sealing ring pressing caps, 1-8 parts of sealing rings, 2-1 parts of inner circulation ports, 2-2 parts of outer circulation ports, 2-3 parts of sliding sleeves, 2-4 parts of shear pins and 2-5 parts of springs.
Detailed Description
The detailed description and technical contents of the present invention are described below with reference to the accompanying drawings, which are provided for reference and illustration purposes only and are not intended to limit the present invention.
According to the figures 1-2, the reverse circulation downhole tool opening pressure testing device comprises an outer cylinder 1-4, wherein a pressure testing connector 1-5 is radially arranged on the outer cylinder, a central hole of the pressure testing connector is communicated with an inner cavity of the outer cylinder, and the inner diameter of the outer cylinder is larger than the outer diameter of the reverse circulation downhole tool. The upper end of the outer cylinder is provided with an upper sealing ring 1-2 and is fixed by an upper sealing ring pressing cap 1-1 in a pressing and buckling manner, and the lower end of the upper sealing ring pressing cap is connected with the outer cylinder in a threaded manner. The lower end of the outer cylinder is provided with a lower sealing ring 1-6 which is fixed by a lower sealing ring pressing cap 1-7 in a pressing and buckling way, and the upper end of the lower sealing ring pressing cap is connected with the outer cylinder in a threaded way. Sealing rings are arranged between the outer walls of the upper end and the lower end of the outer cylinder and the upper sealing ring and between the outer wall of the upper end and the lower sealing ring and the upper sealing ring and the lower sealing ring when the reverse circulation downhole tool penetrates through the upper sealing ring and the lower sealing ring. An annulus is formed between the outer barrel and the reverse circulation downhole tool.
The reverse circulation downhole tool comprises an inner pipe and an outer pipe, wherein an inner circulation hole 2-1 is formed in the inner pipe, an outer circulation hole 2-2 is formed in the outer pipe, a sliding sleeve 2-3 is installed in an annular space between the outer pipe and the inner pipe, the sliding sleeve is connected with the outer pipe through a shear pin 2-4 and temporarily blocks a connecting channel between the inner circulation hole and the outer circulation hole, and a spring 2-5 is arranged at the bottom end of the sliding sleeve.
The lower part of an upper sealing ring pressing cap 1-1 is connected with the upper part of an outer cylinder 1-4 through threads, an upper sealing ring 1-2 is positioned between the upper sealing ring pressing cap 1-1 and the outer cylinder 1-4 and is tightly pressed at the upper end of the outer cylinder 1-4 through the upper sealing ring pressing cap 1-1, an inner hole at the lower end of the upper sealing ring 1-2 is matched with the outer surface of the upper end of the outer cylinder 1-4, and a sealing ring 1-3 is arranged on a matching surface. The side wall of the outer sleeve 1-4 is provided with a round hole vertical to the axis, one end of the pressure test connector 1-5 is inserted into the round hole, and the pressure test connector 1-5 is connected with the outer sleeve 1-4 through welding. The upper part of the lower sealing ring pressing cap 1-7 is connected with the lower part of the outer cylinder 1-4 through threads, the lower sealing ring 1-6 is positioned between the lower sealing ring pressing cap 1-7 and the outer cylinder 1-4 and is tightly pressed at the lower end of the outer cylinder 1-4 through the lower sealing ring pressing cap 1-7, an inner hole at the upper end of the lower sealing ring 1-6 is matched with the outer surface of the lower end of the outer cylinder 1-4, and a sealing ring is arranged on a matching surface.
The working mode of the reverse circulation downhole tool opening pressure testing device is as follows:
The opening pressure testing device of the reverse circulation downhole tool is sleeved at the position of 2-2 of the external circulation hole of the reverse circulation downhole tool, the testing device and the downhole tool are sealed through sealing rings 1-8, the sealing rings 1-8 are arranged in sealing ring grooves on the inner sides of an upper sealing ring 1-2 and a lower sealing ring 1-6, and the positions of the sealing rings 1-8 are positioned at two sides of the external circulation hole 2-2 of the tool to be tested. And during testing, the pressure testing joint 1-5 of the testing device is used for pressurizing an annulus between the testing device and the downhole tool, when the pressure reaches the shearing pressure of the shear pin 2-4 on the sliding sleeve 2-3 of the downhole tool, the shear pin 2-4 is sheared, the pressure in the annulus pushes the sliding sleeve 2-3 to move downwards and compress the spring 2-5, the sliding sleeve 2-3 is opened, the shearing pressure of the shear pin 2-4 is recorded, and the testing of the opening pressure of the reverse circulation downhole tool is completed. Similarly, for reverse circulation downhole tools using other opening pressure settings, such as fully using spring force, the above-described method of operation may also be used.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the scope of the present invention, but other equivalents may be used without departing from the spirit and scope of the invention.
Claims (1)
1. The method for testing the opening pressure of the reverse circulation downhole tool is characterized by being realized by a reverse circulation downhole tool opening pressure testing device, wherein the reverse circulation downhole tool opening pressure testing device comprises an outer cylinder, a pressure testing joint is radially arranged on the outer cylinder, a central hole of the pressure testing joint is communicated with an inner cavity of the outer cylinder, and the inner diameter of the outer cylinder is larger than the outer diameter of the reverse circulation downhole tool; the upper end of the outer barrel is provided with an upper sealing ring and is fixed by an upper sealing ring pressing cap in a pressing and buckling manner, and the lower end of the upper sealing ring pressing cap is in threaded connection with the outer barrel; the lower end of the outer cylinder is provided with a lower sealing ring and is fixed by a lower sealing ring pressing cap in a pressing and buckling way, and the upper end of the lower sealing ring pressing cap is connected with the outer cylinder in a threaded way; sealing rings are arranged between the outer walls of the upper end and the lower end of the outer cylinder and the upper sealing ring and between the upper sealing ring and the lower sealing ring when the reverse circulation downhole tool passes through the upper sealing ring and the lower sealing ring; an annulus is formed between the outer cylinder and the reverse circulation downhole tool; the reverse circulation downhole tool opening pressure testing method comprises the steps that a reverse circulation downhole tool opening pressure testing device is sleeved at the position of an external circulation hole of a reverse circulation downhole tool, a pressure testing joint is communicated with the external circulation hole in an outer pipe of the reverse circulation downhole tool through an inner cavity of an outer cylinder, the testing device and the downhole tool are sealed through sealing rings, the sealing rings are arranged in sealing ring grooves on the inner sides of an upper sealing ring and a lower sealing ring, and the positions of the sealing rings are located on two sides of the external circulation hole of the tool to be tested; and then pressurizing an annulus between the testing device and the downhole tool through the testing device pressure testing joint, when the pressure reaches the shearing pressure of a shear pin on a sliding sleeve of the downhole tool, shearing the shear pin, pushing the sliding sleeve to move downwards by the pressure in the annulus, compressing a spring, opening the sliding sleeve, recording the shearing pressure of the shear pin, and completing the testing of the opening pressure of the reverse circulation downhole tool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510539732.2A CN106482934B (en) | 2015-08-28 | 2015-08-28 | Reverse circulation downhole tool opening pressure testing device and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510539732.2A CN106482934B (en) | 2015-08-28 | 2015-08-28 | Reverse circulation downhole tool opening pressure testing device and method |
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| Publication Number | Publication Date |
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| CN106482934A CN106482934A (en) | 2017-03-08 |
| CN106482934B true CN106482934B (en) | 2019-12-10 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7392840B2 (en) * | 2005-12-20 | 2008-07-01 | Halliburton Energy Services, Inc. | Method and means to seal the casing-by-casing annulus at the surface for reverse circulation cement jobs |
| CN203035182U (en) * | 2012-12-19 | 2013-07-03 | 中国石油集团渤海钻探工程有限公司 | Underground pulsating pressure simulator |
| CN204024591U (en) * | 2014-09-03 | 2014-12-17 | 中国石油集团渤海钻探工程有限公司 | Horizontal well casing pressure is opened reverse circulation valve |
| CN204419159U (en) * | 2014-12-31 | 2015-06-24 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Coiled tubing downhole load testing tool |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070062693A1 (en) * | 2005-09-21 | 2007-03-22 | Vetco Gray Inc. | System, method, and apparatus for degassing tool for coal bed methane gas wells |
| CN205027518U (en) * | 2015-08-28 | 2016-02-10 | 中国石油化工股份有限公司 | Anti - downhole tool cracking pressure testing arrangement that circulates |
-
2015
- 2015-08-28 CN CN201510539732.2A patent/CN106482934B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7392840B2 (en) * | 2005-12-20 | 2008-07-01 | Halliburton Energy Services, Inc. | Method and means to seal the casing-by-casing annulus at the surface for reverse circulation cement jobs |
| CN203035182U (en) * | 2012-12-19 | 2013-07-03 | 中国石油集团渤海钻探工程有限公司 | Underground pulsating pressure simulator |
| CN204024591U (en) * | 2014-09-03 | 2014-12-17 | 中国石油集团渤海钻探工程有限公司 | Horizontal well casing pressure is opened reverse circulation valve |
| CN204419159U (en) * | 2014-12-31 | 2015-06-24 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Coiled tubing downhole load testing tool |
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| CN106482934A (en) | 2017-03-08 |
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