Unlock instant, AI-driven research and patent intelligence for your innovation.

High-strength soluble well complete no-drilling blind plate device

A soluble, high-strength technology, applied in earthwork drilling, transportation and packaging, wellbore/well components, etc., can solve problems such as obstruction and jamming, broken cement annulus, poor well passage, and difficulty in running casing.

Active Publication Date: 2017-11-24
SINOPEC SSC +2
View PDF6 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the implementation of this process, the casing accessories such as drilling rubber plugs and grading hoops are located at the position of the large well deviation angle of the downhole pipe string. When drilling the plugs, there are problems such as unclean cleaning of the accessories in the pipe, wear and tear of the casing or free section tripping, damage to the cement sheath and subsequent passage Problems such as poor wells, obstructions, and cards
Or for highly deviated wells, especially horizontal wells, where casing running is difficult and casing wear is serious due to high casing friction, casing floating operations are required. In order to establish the liquid pressure in the casing during casing floating operations , installing the blind plate in the pipe string can ensure the pressure of the liquid in the pipe above the blind plate to build up. After the construction, the blind plate is drilled to ensure the smoothness of the pipe. Drilling out will increase operation time and operation cost

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
  • High-strength soluble well complete no-drilling blind plate device
  • High-strength soluble well complete no-drilling blind plate device
  • High-strength soluble well complete no-drilling blind plate device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] In this example, the aluminum metal powder, magnesium metal powder, binder, interfacial coupling agent, plasticizer, and reinforced carbon fiber are mixed evenly according to the mass ratio of 9:51:12:2:1:25, and then added to the composite powder Add a small amount of polyvinyl alcohol solution with a mass concentration of 4% to the composite powder slurry, and add 2ml of polyvinyl alcohol solution per 100ml of composite powder slurry. The mixture is heated in the barrel of the injection machine to become a rheological plastic material, and injected into the mold under an appropriate injection pressure. The extrusion port of the mold is a gap with an opening width of 0.3mm, and the extrusion pressure is 2.5MPa to obtain a thickness of 0.25mm. mm flake sintered precursor. Subsequently, the sintered precursor was dried in a tube furnace to remove the liquid medium. The drying temperature was 140° C. and the temperature was kept for 4 hours. The dried sintered precursors...

Embodiment 2

[0077] The carbon fibers of the reinforcing body are added to the anionic surfactant (the anionic surfactant is preferably one or more of sodium hexametaphosphate, sodium lauryl sulfate, sodium lignosulfonate, and sodium cetylbenzenesulfonate species compound), the mass ratio of reinforced carbon fiber to anionic surfactant is 5:1, ultrasonically dispersed for 1.5 to 3 hours, and then centrifuged with ethanol to obtain modified reinforced carbon fiber. Mix aluminum metal powder, magnesium metal powder, binder, interfacial coupling agent, plasticizer, and modified reinforced carbon fiber according to the mass ratio of 10:50:14:2:2:24, and pour into the composite powder Add a small amount of polyvinyl alcohol solution with a mass concentration of 4% to the slurry, and add 2ml of polyvinyl alcohol solution per 100ml of composite powder slurry. The mixture is heated in the barrel of the injection machine to become a rheological plastic material, and injected into the mold under an...

Embodiment 3

[0079] The aluminum-magnesium metal powder and the reinforced carbon fiber are uniformly mixed into a binder consisting of 35% polyurethane, 40% methylcellulose, and 25% polyethylene glycol to obtain a premix. Mix aluminum, magnesium metal powder, carbon fiber, binder, interfacial coupling agent, and plasticizer in the premix evenly according to the mass ratio of 8:52:14:2:2, and mix it on the mixer at a temperature of 70°C After mixing for 1 hour, it becomes a uniform feeding material; after the feeding material is granulated, it is injection-molded on an injection molding machine at a temperature of 170°C and a pressure of 90 MPa for 60 seconds to obtain a corresponding molded body; the molded body is thermally debonded by extraction After curing, sintering was carried out at 1100°C under vacuum conditions and kept for 1.5 hours to obtain the corresponding metal-based magnesium-aluminum composite material.

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

PropertyMeasurementUnit
Densityaaaaaaaaaa
Login to View More

Abstract

The invention relates to a high-strength soluble well complete no-drilling blind plate device in the field of oil and gas field exploration devices; a blind plate adopts a high-strength soluble metal base composite material; and the blind plate is connected with a sleeve short section by adopting a screw. The device is equivalent to a blind plate incapable of circulating under normal conditions; a drill has no need to put in a well to remove the blind plate, so that the well cementing and completion time and the operation cost are reduced; the composite material is dissolved for drainage along with well drilling liquid to effectively prevent the hidden trouble of hanging blockage of fragments of the blind plate to produced pipe columns in subsequent operation; and the device is simple in structure, reliable in installation and convenient in use, has no need to put the drill into the well to salvage accessories of the blind plate in a split no-drilling staged cement injecting device, and is widely applied in multiple places.

Description

technical field [0001] The invention relates to downhole drilling and completion tools in the field of petroleum and natural gas, in particular to a high-strength soluble drilling-free blind plate device for selective cementing and floating casing operations. Background technique [0002] At present, in oil and gas development, in the completion technology of horizontal wells, in order to make the oil layer have a larger exposed area, avoid the damage of the cement slurry to the oil layer, and effectively protect the oil and gas layers, the precision sand filter tube completion method is often used. In the drilling process, the screen top cementing step-by-step cementing process is required. During the implementation of this process, the casing accessories such as drilling rubber plugs and grading hoops are located at the position of the large well deviation angle of the downhole pipe string. When drilling the plugs, there are problems such as unclean cleaning of the accesso...

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
IPC IPC(8): C22C47/14C22C49/04C22C49/14B22F1/00B22F3/22B22F3/14E21B33/13C22C101/10
CPCE21B33/13C22C47/14C22C49/04C22C49/14B22F3/14B22F3/225B22F2003/145B22F1/103B22F1/107
Inventor 张磊王毅杨海波唐明马明新徐鑫赵勇邹晓敏董恩博李国锋邵茹
Owner SINOPEC SSC