Plugging agent, and preparation method and application thereof
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A technology of plugging agent and curing agent, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., to achieve the effects of resisting erosion, reducing economic losses, and improving strength and success rate
Active Publication Date: 2019-03-08
PETROCHINA CO LTD
View PDF7 Cites 5 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
[0005] The embodiment of the present invention provides a plugging agent and its preparation method and application, whi
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
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
preparation example Construction
[0059] In a second aspect, the embodiments of the present invention provide a method for preparing the above-mentioned leakage stoppage agent, the preparation method comprising the following steps:
[0060] Step 1: The mica, walnut shells, mineral fibers, and quartz sand are respectively washed with water, pickled, soaked in a coupling agent, and dried to obtain pre-mica, pre-walnut shells, pre-mineral fibers, and Front quartz sand.
[0061] Wherein, the process of washing mica, walnut shells, mineral fibers, and quartz sand in step 1 is: soak mica, walnut shells, mineral fibers, and quartz sand with clear water for 2 to 3 hours to remove the adsorbed Impurities such as clay on mica surface, walnut shell surface, mineral fiber surface and quartz sand surface.
[0062] In step 1, the process of pickling the washed mica, walnut shells, mineral fibers and quartz sand is as follows: soak the above washed mica, walnut shells, mineral fibers with 0.01%-0.05% dilute sulfuric acid so...
Embodiment 1
[0086] This embodiment provides a self-consolidating material whose formulation is as follows:
[0087] 67 parts by weight of thermoplastic phenolic resin, 32.9 parts by weight of hexamethylenetetramine, and 0.1 part by weight of calcium stearate.
Embodiment 2
[0089]This embodiment provides a self-consolidating material whose formulation is as follows:
[0090] 83 parts by weight of thermoplastic phenolic resin, 16.6 parts by weight of hexamethylenetetramine, and 0.4 parts by weight of calcium stearate.
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
Property
Measurement
Unit
Funnel viscosity
aaaaa
aaaaa
Login to view more
Abstract
The invention discloses a plugging agent, and a preparation method and application thereof, and belongs to the technical field of oilfield chemistry. The plugging agent comprises, by weight, 20-40 parts of mica for covering self-solidifying materials, 25-45 parts of walnut shells for covering the self-solidifying materials, 5-20 parts of mineral fibers for covering the self-solidifying materials,3-15 parts of quartz sand for covering the self-solidifying materials, 0.3-1.5 parts of viscous polymers and 150-250 parts of water; the total mass of the self-solidifying materials in the plugging agent accounts for 3-15% of the total mass of the mica, the walnut shells, the mineral fibers and the quartz sand. The self-solidifying materials in the plugging agent undergo a polycondensation reaction at a downhole temperature to form three-dimensional resin, so that the solidification force between the components of the plugging agent is improved, scouring of drilling fluids can be effectively resisted, and the strength of a plugging layer and the success rate of plugging are increased; the success rate of plugging of the plugging agent can reach more than 90%, and the economic loss caused by plugging failure is reduced.
Description
technical field [0001] The invention relates to a plugging agent and a preparation method and application thereof, belonging to the technical field of oil field chemistry. Background technique [0002] Lost circulation is a common occurrence during drilling. Lost circulation not only consumes drilling fluid, prolongs drilling time, increases drilling costs, but also leads to other dangerous situations, such as well collapse or blowout. Therefore, after lost circulation occurs, the staff need to plug the lost zone in time. [0003] At present, the commonly used plugging method is to compound the plugging materials such as mica, walnut shell and fiber in the polymer solution to form a plugging agent, and pump the plugging agent to the leakage zone for plugging. [0004] However, the above-mentioned plugging agent only simply physically accumulates materials such as mica, walnut shells and fibers in the downhole, and plugs the lost circulation zone. The circulating drilling ...
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
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more