CN202481515U

CN202481515U - Novel oil well steel pipe end coupling internal thread protection device

Info

Publication number: CN202481515U
Application number: CN2012200105014U
Authority: CN
Inventors: 张焕林
Original assignee: BAOJI JINCHENG MACHINE MANUFACTURING Co Ltd
Current assignee: BAOJI JINCHENG MACHINE MANUFACTURING Co Ltd
Priority date: 2012-01-11
Filing date: 2012-01-11
Publication date: 2012-10-10
Anticipated expiration: 2022-01-11

Abstract

The utility model provides a novel oil well steel pipe end coupling internal thread protection device. The device comprises a steel ring shell, wherein the excircle of the steel ring shell is sleeved with a plastic protection ring adapted to the excircle of the steel ring shell, the excircle of the plastic protecting ring is provided with an external thread adapted to an oil well steel pipe end coupling internal thread, bulges are uniformly distributed on the excircle of the steel ring shell, a groove is formed in the inner wall of the plastic protecting ring, and the bulges are formed in the groove. According to the utility model, under the condition that the thickness of a steel ring is not increased, through changing the combination manner of the steel ring and the plastic protection ring, the axial strength of the steel ring shell is increased, the deviation from circular form of the steel ring shell is reduced, and further, the threading circular degree of the plastic protection ring is improved and the product quality and the protection effect are improved.

Description

Nonpetroleum oil well steel pipe pipe end box cupling negative thread fender guard

Technical field

The utility model is used for the oil well water pipe precaution, is specifically related to a kind of nonpetroleum oil well steel pipe pipe end box cupling negative thread fender guard.

Background technology

It with the immediate prior art of the utility model " oil well pipe end box cupling negative thread fender guard " (ZL20102544242.4) utility model patent; Though this patent has solved the protection to pipe end box cupling negative thread, has complex structure, manufacture difficulty is big; Cost of labor is high; Deviation from circular from is big, and therefore drawbacks such as loading and unloading inconvenience are necessary to improve.

The utility model content

The technical matters that the utility model solves: a kind of nonpetroleum oil well steel pipe pipe end box cupling negative thread fender guard is provided; Do not increasing under the steel loop thickness situation; Through changing the combination of steel loop and plastics protection ring, increased the axial strength of steel loop housing, reduce the deviation from circular from of steel loop; And then the car silk circularity of raising plastics protection ring, improve the quality of product and protect effect.

The technical scheme that the utility model adopts: nonpetroleum oil well steel pipe pipe end box cupling negative thread fender guard; Comprise the steel loop housing; Be set with the plastics protection ring suitable on the cylindrical of said steel loop housing, be shaped on the cylindrical of said plastics protection ring and the suitable outside thread of oil well steel pipe pipe end box cupling negative thread, be uniformly distributed with convexity on the cylindrical of said steel loop housing with it; Be shaped on groove on the inwall of said plastics protection ring, and make convexity be positioned at groove.

Further, said convexity is shaped through punching press rectangular opening on the steel loop inner walls, and is connected the upper end with the steel loop housing outward-dipping in protruding lower end, the outward-dipping structure that said groove is and convexity is suitable.

Wherein, the lower port of said plastics protection ring is closed.

Wherein, the lower port of said plastics protection ring is an open type.

Further, the flat width of the horizontal saliva of said plastics protection ring upper end edge mouth is 2-10mm.

Further, place, skirt section, said plastics protection ring lower end highly is 5-30mm.

The utility model compared with prior art is shaped on convexity on the external wall of steel ring shell; Be shaped on the plastics protection ring inwall and protruding suitable groove; Increased the axial strength of steel loop housing, improved side direction impact resistant capability and slip-off preventing performance, steel loop housing upper end flanging circular arc degree has been diminished highly reduce; The plastics protection ring horizontal direction suitable with it broadened, thereby mechanical property is greatly taken on a new look.

Description of drawings

Fig. 1 is the utility model structural representation;

Fig. 2 is the steel loop structural representation of the utility model.

The specific embodiment

A kind of embodiment of the utility model is described below in conjunction with accompanying

drawing

1,2.

Nonpetroleum oil well steel pipe pipe end box cupling negative thread fender guard comprises steel loop housing 1, is set with the plastics protection ring 2 suitable with it on the cylindrical of said steel loop housing 1; Be shaped on the cylindrical of said plastics protection ring 2 and the suitable outside thread 7 of oil well steel pipe pipe end box cupling negative thread, be uniformly distributed with convexity 3 on the cylindrical of said steel loop housing 1, be shaped on groove 6 on the inwall of said plastics protection ring 2; And make protruding 3 to be positioned at groove 6, specifically, said protruding 3 through 9 shapings of punching press rectangular opening on steel loop housing 1 inwall; And protruding 3 lower ends are connected the upper end with steel loop housing 1 outward-dipping; Said groove 6 is the outward-dipping structure suitable with protruding 3, and is adaptive through the once public female combination of stamped steel toroidal shell body 1, plastics protection ring 2, improved the connectivity of fender guard greatly; Impact resistance and steel are moulded the intensity of combination; The lower port 8 of said plastics protection ring 2 is closed or open type, and place, skirt section, plastics protection ring 2 lower end highly is 5-30mm, and the lower port 8 of plastics protection ring 2 is through testing by 5 millimeters of original vertical distances; Be increased to present 30 millimeters, thereby improved the mechanical property of plastics protection ring 2 greatly; The circular arc degree at steel loop housing 1 flanging circular arc position 5 step-down that diminishes, the flat width 4 of the horizontal saliva of plastics protection ring 2 upper end edge mouths that matches is 2-10mm, after the flat width 4 of the horizontal saliva of plastics protection ring 2 upper end edge mouths thicken in the horizontal direction, has strengthened greatly and has prevented hitting by force the pick-proof performance.

The utility model device is contained the internal-thread protector specification of diameter 139.7mm to the oil well steel pipe box cupling between the 339.7mm.

The foregoing description, just the preferred embodiment of the utility model is not to be used for limiting the utility model practical range, so all equivalences of being done with the said content of the utility model claim change, all should be included within the utility model claim scope.

Claims

1. nonpetroleum oil well steel pipe pipe end box cupling negative thread fender guard; Comprise steel loop housing (1); Be set with the plastics protection ring (2) suitable on the cylindrical of said steel loop housing (1), be shaped on the cylindrical of said plastics protection ring (2) and the suitable outside thread (7) of oil well steel pipe pipe end box cupling negative thread, it is characterized in that: be uniformly distributed with convexity (3) on the cylindrical of said steel loop housing (1) with it; Be shaped on groove (6) on the inwall of said plastics protection ring (2), and make convexity (3) be positioned at groove (6).

2. nonpetroleum oil well steel pipe pipe end box cupling negative thread fender guard according to claim 1; It is characterized in that: said convexity (3) is shaped through punching press rectangular opening (9) on steel loop housing (1) inwall; And protruding (3) lower end is connected the upper end with steel loop housing (1) outward-dipping, and said groove (6) is and protruding (3) suitable outward-dipping structure.

3. nonpetroleum oil well steel pipe pipe end box cupling negative thread fender guard according to claim 1 and 2, it is characterized in that: the lower port (8) of said plastics protection ring (2) is closed or open type.

4. nonpetroleum oil well steel pipe pipe end box cupling negative thread fender guard according to claim 3 is characterized in that: the flat width (4) of the horizontal saliva of said plastics protection ring (2) upper end edge mouth is 2-10mm.

5. nonpetroleum oil well steel pipe pipe end box cupling negative thread fender guard according to claim 3 is characterized in that: place, said plastics protection ring (2) skirt section, lower end highly is 5-30mm.