CN211976158U

CN211976158U - Resistance to crushing enhancement mode composite pipe

Info

Publication number: CN211976158U
Application number: CN202020585959.7U
Authority: CN
Inventors: 蔺建刚; 李强; 曹玉庆; 李召勇
Original assignee: Hebei Haien Rubber Products Co ltd
Current assignee: Hebei Haien Rubber Products Co ltd
Priority date: 2020-04-20
Filing date: 2020-04-20
Publication date: 2020-11-20
Anticipated expiration: 2030-04-20

Abstract

The utility model belongs to the technical field of the composite pipe, specific saying relates to a resistance to compression bursting enhancement mode composite pipe, and the structure of specially adapted flexible composite coiled tubing is reinforceed. The collapse-resistant reinforced composite pipe comprises an inner pipe layer, a composite reinforced layer and an outer pipe layer; set up the anti crushing layer between compound enhancement layer and outer pipe layer, the anti crushing layer is the spring body that the billet hoop winding formation of cross-section is circular or rectangle and winding angle is between 75 ~ 85. The collapse-resistant reinforced composite pipe wave has the characteristics of high tensile strength, strong axial impact buffering capacity, high compressive strength, good flexibility of the pipe body, corrosion resistance, scaling resistance and long service life.

Description

Resistance to crushing enhancement mode composite pipe

Technical Field

The utility model belongs to the technical field of the composite pipe, specific saying relates to a resistance to compression bursting enhancement mode composite pipe, and the structure of specially adapted flexible composite coiled tubing is reinforceed.

Background

At present, the steel oil pipe is mostly adopted in the oil extraction and water injection pipe column of the land oil field in China, and the steel pipe column used in the oil extraction mode is easy to be quickly corroded and perforated due to the action of underground oil, gas and water, so that the serious consequences such as falling of the pipe column into the well can be caused. In addition, the common steel pipe columns are mostly of fixed length and size, the pipe columns need to be connected one by one in the well descending process, the site construction efficiency is low, and the labor intensity of operators is high.

Aiming at the problems, the nonmetal flexible composite coiled tubing is tried in part of domestic oil fields, the tubing is developed from flexible composite tubing (mainly plastic tubing/plastic tubing) used on the ground, the axial tensile strength is generally low, and the accidents of pulling out and dropping out of a well by a tubing string frequently occur in the using process, so that the popularization and the application of the nonmetal coiled tubing are seriously limited.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a tensile strength is high, buffering axial impact ability is strong, and compressive strength is high, and the flexible developments of body are bent flexible and are good and corrosion-resistant, resistant scale deposit, long service life's compound pipe of resistance to crushing enhancement mode.

In order to achieve the above object, the utility model adopts the following technical scheme:

a collapse-resistant reinforced composite pipe comprises an inner pipe layer, a composite reinforcing layer and an outer pipe layer; the method is characterized in that: and an anti-crushing layer is arranged between the composite reinforcing layer and the outer pipe layer, the anti-crushing layer is a spring body formed by annularly winding steel bars with circular or rectangular sections, and the winding angle is 75-85 degrees.

The additional technical characteristics of the crush-resistant reinforced composite pipe further comprise:

a plurality of through holes are formed in steel bars forming the spring body, and steel wires or aramid fiber tows penetrating through the through holes are axially arranged on the circumferential edge of the spring body along a pipeline;

the inner pipe layer and the outer pipe layer are both formed by heating and extruding high polymer materials, including but not limited to high-density polyethylene and ultrahigh molecular weight polyethylene;

-the composite reinforcement layer comprises an inner pressure resistant layer, a first wear layer, a tensile layer and a second wear layer, the inner pressure resistant layer being arranged outside the inner tube layer, the first wear layer being arranged between the inner pressure resistant layer and the tensile layer, the second wear layer being arranged between the tensile layer and the collapse resistant layer;

the internal pressure resistant layer is formed by cross winding of polyester industrial filaments or aramid filaments; the first wear-resistant layer and the second wear-resistant layer are formed by winding glass fiber adhesive tapes; the tensile layer is a steel wire woven mesh or a high-strength fiber woven mesh;

-the number of tensile layers is multiple and the weaving angle is between 20 ° and 50 °.

The utility model provides a compound pipe of resistance to crushing enhancement mode compares with prior art, has following advantage: firstly, the crushing-resistant layer is arranged between the composite enhancement layer and the outer pipe layer of the crushing-resistant reinforced composite pipe, the crushing-resistant layer is a spring body formed by annularly winding steel bars with circular or rectangular cross sections, the winding angle is 75-85 degrees, the comprehensive bearing capacity of the nonmetal flexible pipe is improved, the spring body deforms and rebounds after the pipe body is impacted by external force, crushing collapse cannot occur, and therefore the nonmetal flexible pipe can work safely under positive pressure and negative pressure; secondly, the nonmetal hose with the spring body arranged in the middle has good flexibility, good dynamic flexibility, safe and reliable performance and long service life, and because the winding of the spring is controlled annular winding (the winding angle is 75-85 degrees), the spring is uniformly wound, the strength of the pipe is obviously improved, the bearing capacity can reach 8-15 MPa, and the composite pipe column can bear higher negative pressure in the water injection process or the backwashing process, so that the pipe body is prevented from being crushed and damaged; thirdly, because the performance of relaxing impact or vibration, storage energy of spring, the winding spring of hoop does not take place the displacement moreover, can not produce the inner wall expand tube phenomenon, can not produce the outstanding of body terminal surface spring or the connection and the damage problem that the defect caused to delay the life of tubular product, compare the reinforcing tubular product that uses simple vertical, horizontal wire net reinforcing, its effective life cycle extension is more than 2 times, and have extensive practical range.

Drawings

Fig. 1 is a schematic structural view of the reinforced collapse-resistant composite pipe of the present invention.

Detailed Description

The structure and the working principle of the reinforced collapse-resistant composite pipe provided by the present invention will be further described in detail with reference to the accompanying drawings.

Referring to fig. 1, the structure of the reinforced composite pipe against collapse provided by the present invention is schematically illustrated. The collapse-resistant reinforced composite pipe comprises an inner pipe layer 1, a composite reinforcing layer 2 and an outer pipe layer 3; an anti-crushing layer 4 is arranged between the composite reinforcing layer 2 and the outer pipe layer 3, the anti-crushing layer 4 is a spring body formed by annularly winding steel bars with circular or rectangular cross sections, and the winding angle is 75-85 degrees.

The working principle is as follows: this novel compound pipe sets up the spring body that spiral winding formed between compound enhancement layer 2 and the outer pipe layer 3, the billet cross-section that constitutes the spring body is circular or rectangle, utilize the relaxation that spring itself had to strike (or vibrate), the performance of energy storage, the comprehensive bearing capacity who has improved compound hose (nonmetal flexible pipe) or has adopted alone indulge, horizontal steel wire reinforcing compound pipe, especially when receiving axial shock, can kick-back fast and warp, also can not take place the conquassation collapse phenomenon, the operation security of compound hose (plastic tubing/plastic pipe) has been strengthened.

In the process of forming the reinforced crush-resistant composite pipe,

in order to enhance the structural stability of the composite pipe (plastic pipe/plastic pipe), a plurality of through holes are formed in steel bars forming the spring body, steel wires or aramid fiber tows 41 penetrating through the through holes are axially arranged on the circumferential edge of the spring body along a pipeline, the weight of the spring body can be reduced on the basis of ensuring the telescopic performance of the spring by arranging the through holes in a steel belt of the spring body, the lightweight effect of the composite pipe body is achieved, the steel wires or aramid fiber tows 41 are laid through the through holes, the axial tensile capacity is improved, the axial deformation of the pipe body is prevented from being excessive, and meanwhile, the capacity of the spring body for bearing internal pressure impact and external pressure impact is enhanced;

the inner pipe layer 1 and the outer pipe layer 3 are both formed by heating and extruding high polymer materials, the high polymer materials include but are not limited to high-density polyethylene and ultrahigh molecular weight polyethylene, the inner pipe layer 1 plays a role in blocking and sealing to provide a closed space for internally conveyed fluid, and the outer pipe layer 3 plays a role in wrapping and protecting to improve the wear resistance and aging resistance of the composite flexible pipe;

preferably, the composite reinforcing layer 2 comprises an inner pressure resistant layer 21, a first wear-resistant layer 22, a tensile layer 23 and a second wear-resistant layer 24, the inner pressure resistant layer 21 is arranged on the outer side of the inner tube layer 1, the first wear-resistant layer 22 is arranged between the inner pressure resistant layer 21 and the tensile layer 23, the second wear-resistant layer 24 is arranged between the tensile layer 23 and the collapse resistant layer 4, and the first wear-resistant layer 22 and the second wear-resistant layer 24 can prevent two adjacent structural layers from being worn and damaged with each other, so that the effective service life of the composite tube is prolonged;

of course, the number of the composite reinforcement layer 2 composed of the inner pressure resistant layer 21, the first abrasion resistant layer 22, the tensile layer 23 and the second abrasion resistant layer 24 may be set to be plural according to different use scenarios;

furthermore, the internal pressure resistant layer 21 is formed by winding industrial polyester filaments or aramid filaments in a crossed manner, can be arranged in an even number of laminated structures, has excellent performances of high breaking strength, high elastic modulus, low elongation, good impact resistance and the like, and realizes the effect of safely and stably conveying media; the first wear-resistant layer 22 and the second wear-resistant layer 24 are formed by winding glass fiber adhesive tapes, so that the adhesive force is good, the isolation effect is outstanding, and sliding wear between adjacent structural layers is avoided; the tensile layer 23 is a steel wire mesh grid or a high-strength fiber mesh grid, so that the axial bearing capacity and the crush resistance of the composite pipe can be effectively improved;

furthermore, the tensile layers 23 are multiple in number, the weaving angle is 20-50 degrees, when the pipe body bears pressure, the pipe body expands and contracts, the stress of the composite reinforcing layer 22 is transmitted layer by layer from the inner layer, and the comprehensive impact resistance of the rubber hose is improved.

Claims

1. A collapse-resistant reinforced composite pipe comprises an inner pipe layer, a composite reinforcing layer and an outer pipe layer; the method is characterized in that: and an anti-crushing layer is arranged between the composite reinforcing layer and the outer pipe layer, the anti-crushing layer is a spring body formed by annularly winding steel bars with circular or rectangular sections, and the winding angle is 75-85 degrees.

2. The crush-resistant reinforced composite pipe as claimed in claim 1, wherein: a plurality of through holes are formed in steel bars forming the spring body, and steel wires or aramid fiber tows penetrating through the through holes are axially arranged on the circumferential edge of the spring body along a pipeline.

3. A crush-resistant reinforced composite pipe according to claim 1 or 2, wherein: the inner pipe layer and the outer pipe layer are both formed by heating and extruding high polymer materials, and the high polymer materials include, but are not limited to, high-density polyethylene and ultrahigh molecular weight polyethylene.

4. The crush-resistant reinforced composite pipe as claimed in claim 1, wherein: the composite reinforcing layer comprises an internal pressure resistant layer, a first wear-resistant layer, a tensile layer and a second wear-resistant layer, the internal pressure resistant layer is arranged on the outer side of the internal pipe layer, the first wear-resistant layer is arranged between the internal pressure resistant layer and the tensile layer, and the second wear-resistant layer is arranged between the tensile layer and the collapse resistant layer.

5. The crush-resistant reinforced composite pipe as claimed in claim 4, wherein: the internal pressure resistant layer is formed by cross winding of polyester industrial filaments or aramid fibers; the first wear-resistant layer and the second wear-resistant layer are formed by winding glass fiber adhesive tapes; the tensile layer is a steel wire woven mesh or a high-strength fiber woven mesh.

6. The crush-resistant reinforced composite pipe as claimed in claim 5, wherein: the number of the tensile layers is multiple, and the weaving angle is between 20 degrees and 50 degrees.