Continuously reinforced plastic heat-preserving composite pipeline used for oil field ground and its manufacturing technique

A technology of reinforced plastic and composite pipes, which is applied in the direction of pipes, applications, and rigid pipes. It can solve the problems of poor assembly concentricity between the oil pipeline and the insulation layer, and uneven thickness of the insulation layer, so as to achieve good insulation effect, good concentricity, and energy saving. Effect

Inactive Publication Date: 2008-04-02
长春高祥特种管道有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention also discloses the production process of the above-mentioned composite pipe, which continuously produces long-distance pipelines and solves the problems of poor assembly concentricity between the oil delivery pipe and the insulation layer and uneven thickness of the insulation layer in the existing production process of the composite insulation pipe

Method used

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  • Continuously reinforced plastic heat-preserving composite pipeline used for oil field ground and its manufacturing technique

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Effect test

Embodiment 1

[0019] The structure of the continuous reinforced plastic thermal insulation composite pipeline for buried oilfield is shown in Figure 1. The composite pipeline body consists of anticorrosion layer 1, reinforcement layer 2, cladding layer 3, sealant layer 4, insulation layer 5, sealant layer 6, protection layer Layer 7, the continuous reinforced plastic composite pipe is formed by the anticorrosion layer 1, the reinforced layer 2, and the cladding layer 3, and the cross-linked polyethylene foam material is continuously wrapped on the continuous reinforced plastic composite pipe to form a continuous insulation layer 5. A sealant layer 4 and 6 are respectively coated between the layer 3 and the insulation layer 5 and between the insulation layer 5 and the protective layer 7 .

[0020] The reinforcing layer is braided by metal steel wires, the material of the anti-corrosion layer and the cladding layer is cross-linked polyethylene, the material of the protective layer and the seal...

Embodiment 2

[0022] Pass 98 parts by weight of polyethylene cross-linking grafts, 5 parts by weight of polyethylene catalyst masterbatch and 2 parts of polyethylene-based hot melt adhesive through the co-extrusion die, vacuum sizing and cooling to form an inner tube Anti-corrosion layer 1;

[0023] co-extrusion process

[0024] Barrel process: Zone 1: 60~80℃, Zone 2: 150~160℃, Zone 3: 160~170℃,

[0025] Zone 4: 160~170℃, Zone 5: 165~170℃;

[0026] Die head process: Sixth zone: 165~170℃, Seventh zone: 150~160℃, Eighth zone: 150~60℃;

[0027] Host speed: 40-70 rpm, traction speed: 2-3 m / min, vacuum degree: 0.02-0.03MPa;

[0028] On the anticorrosion layer 1, one or more layers of steel wires are braided by a braiding machine to form the reinforcement layer 2, and the reinforcement layer 2 is covered with a polyethylene coating layer 3, and a thin layer of sealing layer is evenly coated on the coating layer 3. Adhesive layer 4, wrap the cross-linked polyethylene foam insulation layer 5 lo...

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Abstract

The present invention discloses a continuous reinforced plastic composite pipe and the production technique for buried heat insulation of oil field; the continuous reinforced plastic composite pipe consists of an anticorrosive coating, a reinforced layer and a coating layer; crosslinked polyethylene foamed material is continuously rolled on the continuous reinforced plastic composite pipe to form a continuous insulating course, and fluid sealant layers are respectively coated between the coating layer and the insulating layer, the insulating layer and the protective layer. The reinforced layer is weaved by metal steel wires; the anticorrosive coating and the coating layer are made of crosslinked polyethylene material; the protective layer is made of polyethylene; the insulating course is made of crosslinked polyethylene foam. The pipe of the present invention is a long-distance flexible continuous pipe; the insulating course is made of crosslinked polyethylene flexible material; the continuous reinforced plastic composite pipe has good memory, rebound resilience and concentricity inside and outside the pipeline and ensures that the continuous heat insulation pipeline prevents being squashed after being coiled and buried; thereby the thickness of the insulating course is consistent and achieving better heat insulation effect. The pipeline paved by the invention, even if the local part is damaged, water can be effectively prevented to seep into the insulating course in order to ensure the heat insulation effect.

Description

Technical field: [0001] The invention relates to the improvement of the material and structure of oil field heat preservation pipelines, and provides a continuous reinforced plastic composite pipe for oil field buried heat preservation, a continuous heat preservation pipe for transporting liquid and gas, and also provides the production process of the pipe, which belongs to metal The technical field of plastic composite pipe production. Background technique: [0002] In view of the cold winter climate, high soil water level, high salt content, complex soil structure and other factors in the northern oilfield area, the buried pipelines used in the field of oilfield gathering and transportation must be treated with anti-corrosion and heat preservation. The existing buried pipelines are made of 3 ~12 meters fixed-length composite insulation pipes are connected. The anti-corrosion and insulation outer layer of each composite insulation pipe is mainly made of polyurethane foam or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L9/147B29D23/00B29C47/06B29C47/92B29C48/92
Inventor 李诗春
Owner 长春高祥特种管道有限公司
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