CN209720421U - Oil well steel tube end external screw thread even muscle formula thread protector - Google Patents

Abstract

A kind of oil well steel tube end external screw thread company muscle formula thread protector is provided, including steel loop shell and plastics protection ring, plastics protection ring is placed on steel loop enclosure interior by single injection-molded, it is fastenedly connected between plastics protection ring and steel loop shell by multiple riveted structure riveteds that even circumferential is arranged, riveted structure includes the radial riveting groove toward central axis recess of steel loop shell, riveting groove center is formed with overflow hole, plastics protection ring is molded feed liquid in injection molding process and fills up riveting groove formation riveter by overflow hole spilling, steel loop housing outer surface between adjacent riveting groove is equipped with even muscle slot, plastics protection ring is molded material flow in injection molding process and forms company's muscle that adjacent riveter links together into even muscle slot, to make adjacent riveter form the structure that is implicative of each other, it effectively prevent steel loop shell and plastics to protect The loose or dislocation of ring；Riveting groove is contoured to the different shapes structure such as circle, square groove, structure diversification, generalization.

Description

Oil well steel tube end external screw thread even muscle formula thread protector

Technical field

The utility model belongs to screw thread protection technical field, and in particular to a kind of oil well steel tube end external screw thread company Muscle formula thread protector.

Background technique

Oil well steel pipe is the common component of oil mining, oil well steel pipe during transportation, easily to pipe end Screw thread damages, and pipe end head thread once damages, and will lead to scrapping for entire steel pipe.In order to guarantee making for oil well steel pipe With performance, generally steel pipe tube head is protected by thread protector.In the prior art, Authorization Notice No. is " CN The patent document of 204726865 U ", entitled " the new-type protective device of oil well steel tube end external screw thread " disclose outside one kind Thread protector, the technical solution of this document are achieved in that on steel loop shell uniformly distributed multiple overflow holes, plastics protection Ring and steel loop shell single injection-molded and the feed liquid riveted fastening again overflowed by overflow hole, to increase considerably steel loop Binding force between shell and plastics protection ring.In above-mentioned existing external thread protective device, since the annular of riveted fastening is recessed Slot is only common groove structure, and the riveter of formation can exist firm and deviate from out of slot, the guarantee steel loop that cannot more consolidate Binding force between shell and plastics protection ring.It is therefore desirable to propose to improve.

Utility model content

The technical problem solved by the utility model is:to provide a kind of oil well steel tube end external screw thread even muscle formula screw threads to protect Protection unit, the utility model company's of production muscle between adjacent riveting groove, can connect adjacent riveter, to make adjacent riveter Formation is implicative of each other structure, effectively prevent the loose or dislocation of steel loop shell Yu plastics protection ring, rivets groove and is contoured to justify The different shapes structure such as shape, square groove, makes the utility model structure diversification, generalization.

The technical solution adopted in the utility model: oil well steel tube end external screw thread even muscle formula thread protector, Including steel loop shell and plastics protection ring, the plastics protection ring is placed on steel loop enclosure interior by single injection-molded, described The internal screw thread being adapted to the external screw thread of oil well steel tube end, the plastics protection are formed on plastics protection ring inner circumferential surface It is fastenedly connected between ring and steel loop shell by multiple riveted structure riveteds that even circumferential is arranged, the riveted structure is included in The riveting groove of steel ring shell body central axis recess, the riveting groove center system are yearned on steel loop shell by the diameter being stamped and formed out There is an overflow hole, the plastics protection ring, which is molded feed liquid in injection molding process and fills up riveting groove by overflow hole spilling, to be formed Riveter, the adjacent steel loop housing outer surface riveted between groove are equipped with even muscle slot, the plastics protection ring and are being molded into Injection molding feed liquid flows into even muscle slot by overflow hole and riveting groove and forms company's muscle that adjacent riveter links together during type.

To the preferred embodiment of above-mentioned technical proposal, the company of being equipped between the radially adjacent riveting groove of steel loop shell circumference Muscle slot simultaneously connects muscle by forming radial direction after injection molding feed liquid filling；Wherein, in the steel loop shell circumference radially per adjacent two riveting It connects the company's of being equipped with muscle slot between groove and forms radial ringed even muscle after filling by injection molding feed liquid；Or in the steel loop shell It is radially segmented equipped with even muscle slot between the radially adjacent more than two riveting grooves of circumference and by formation after injection molding feed liquid filling Formula connects muscle.

To the preferred embodiment of above-mentioned technical proposal, the company's of being equipped with muscle slot between the upper adjacent riveting groove of steel loop shell axial direction And axially connect muscle by being formed after injection molding feed liquid filling；Wherein, the steel loop shell axially it is upper per adjacent two rivetings groove it Between the company's of being equipped with muscle slot and by injection molding feed liquid filling after formed it is axially consecutive even muscle；Or in the upper phase of steel loop shell axial direction Connect muscle equipped with even muscle slot between adjacent more than two riveting grooves and by forming axial segmentation formula after injection molding feed liquid filling.

To the preferred embodiment of above-mentioned technical proposal, the steel loop shell circumference radially with axial adjacent riveting groove it Between be equipped with even muscle slot and by injection molding feed liquid filling after formed it is staggered even muscle.

To the preferred embodiment of above-mentioned technical proposal, make to put down at the even edge line of muscle slot and riveting groove sideline opposite two The neat and company's of being formed muscle snap riveting grooved configuration simultaneously passes through the company's of being formed muscle snap riveting band after injection molding feed liquid filling, wherein the even muscle snap riveting Overflow hole in grooved configuration uses the row being uniformly arranged, two rows or is greater than two rows.

To the preferred embodiment of above-mentioned technical proposal, the shape of the riveting groove selects circular groove structure, square groove Structure, oval-shaped groove structure, rectangular recess structure or diamond groove structure, quincunx groove structure, triangle groove knot Structure, the shape for riveting the overflow hole in groove select round, rectangular, oval, rectangle, triangle, diamond shape or plum Flower-shape.

To the preferred embodiment of above-mentioned technical proposal, the riveting groove floor is planar base surface or the riveting groove-bottom Face is to be recessed to steel loop shell central axis and make overflow hole edge to the arc-shaped recess tilted far from steel loop shell central axis direction Ring structure or rectangular recess ring structure；Or the riveting groove floor is equipped with the protruding ring protruded to steel loop housing outer surface Structure；Or the overflow hole center deviation riveting groove center of the riveting groove floor forms eccentric overflow hole, the bias Overflow hole can deviate the one border any direction of riveting groove center；Or the overflow hole in the riveting groove is after punching Crotch structure or the riveting groove are bloomed in self-assembling formation arbitrarily for into steel ring shell body in side in the circumferential steel ring shell body in hole four Side blow backfin bending at three overturning angle tongue type groove structures, the three overturning angles tongue type groove structure cuts with steel loop shell Disconnected place forms overflow hole.

To the preferred embodiment of above-mentioned technical proposal, the plastics protection ring sealing end is formed with convenient for hand-held hand-held slot, institute It states hand-held slot outer edge and is formed with handling hole, described steel loop shell one end opposite to the open end is radially formed by bending varus inside Side.

To the preferred embodiment of above-mentioned technical proposal, the steel loop shell is that sealing end diameter in upper end is straight less than lower ending opening end The pyramidal structure of diameter, the plastics protection ring and steel loop shell physical fit are also in up-small and down-big pyramidal structure, the plastics Internal screw thread on protection ring inner circumferential surface by lathe machine vehicle system form or in plastics protection ring injection moulding process it is primary Injection molding.

The utility model compared with prior art the advantages of:

1, this programme is uniformly provided with riveting groove on steel loop shell, and riveting groove center is formed with overflow hole, plastics protection Ring is molded feed liquid in injection molding process and fills up riveting groove formation riveter by overflow hole spilling, and this riveted type structure increases Add the binding force between steel loop shell and plastics protection ring, the loose phenomenon for mutually not borrowing power to occur between the two can be prevented, and And the company's of setting muscle slot, plastics protection ring are being molded into the utility model in the adjacent steel loop housing outer surface riveted between groove again Injection molding feed liquid flows into even muscle slot by overflow hole and riveting groove and forms company's muscle that adjacent riveter links together during type, This even muscle structure can connect adjacent riveter, be implicative of each other structure to be formed, further prevent steel loop shell with The loose or dislocation of plastics protection ring；

2, riveting groove floor is set as being recessed to steel loop shell central axis and makes overflow hole edge to separate in this programme Perhaps rectangular recess ring structure or processing rivet groove floor to the arc-shaped recess ring structure that steel loop shell central axis direction tilts Overflow hole center deviation equipped with the raised ring structure protruded to steel loop housing outer surface, or riveting groove floor rivets groove The eccentric overflow hole being centrally formed and interior crotch structure, three overturning angle tongue type groove structures, these structures can make plastics The riveter and riveting groove that protection ring is formed in injection molding process form depressed snap-in structure, so as to effectively limit riveting Head is deviate from from overflow hole, improves bonding strength；

3, the shape that groove is riveted in this programme can be made circular groove structure, square groove structure, oval-shaped groove Structure, rectangular recess structure or diamond groove structure, quincunx groove structure or other shapes structure keep this practical New structure diversification, generalization.

Detailed description of the invention

Fig. 1 is that the complete section of the utility model cuts structural schematic diagram；

Fig. 2 is the structural schematic diagram of radial ringed even muscle in the utility model；

Fig. 3 is the structural schematic diagram that radial segmented connects muscle in the utility model；

Fig. 4 be in Fig. 3 A-A to structure sectional view；

Fig. 5 is the structural schematic diagram of axially consecutive even muscle in the utility model；

Fig. 6 is the B-B direction structure sectional view in Fig. 5；

Fig. 7 is the structural schematic diagram that axial segmented connects muscle in the utility model；

Fig. 8 is the structural schematic diagram of staggered even muscle in the utility model；

Fig. 9 is the structural schematic diagram for connecting muscle snap riveting grooved configuration in the utility model；

Figure 10 is to connect the broken sectional for having two rows of overflow holes in muscle snap riveting grooved configuration in the utility model；

Figure 11 is to connect the broken sectional for having three overflowing discharge orifices in muscle snap riveting grooved configuration in the utility model；

Figure 12 is the structural schematic diagram of circular groove structure in the utility model；

Figure 13 is the structural schematic diagram of square groove structure in the utility model；

Figure 14 is the structural schematic diagram that circular groove structure combines round overflow hole in the utility model；

Figure 15 is the structural schematic diagram that square groove structure combines rectangular overflow hole in the utility model；

Figure 16 is the structural schematic diagram that oval-shaped groove structure combines oval overflow hole in the utility model；

Figure 17 is the structural schematic diagram of rectangular recess structure combination rectangle overflow hole in the utility model；

Figure 18 is the cross section structure figure of riveting groove flat in the utility model；

Figure 19 is the broken sectional that the riveting groove of arc-shaped recess ring structure is formed in the utility model；

Figure 20 is the broken sectional that the riveting groove of rectangular recess ring structure is formed in the utility model；

Figure 21 is the broken sectional that the riveting groove of raised ring structure is formed in the utility model；

Figure 22 is the broken sectional for the riveting groove that eccentric overflow hole up deviates in the utility model；

Figure 23 is the broken sectional for the riveting groove that eccentric overflow hole deviates down in the utility model；

Figure 24 is the broken sectional of the riveting groove in the utility model with interior crotch structure；

Figure 25 is the broken sectional that the utility model intermediate cam tilts tongue type groove structure.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.

Fig. 1-2 5, the embodiments of the present invention are please referred to, oil well steel tube end external screw thread is protected with even muscle formula screw thread Protection unit, as shown in Figure 1, including steel loop shell 1 and plastics protection ring 2, the plastics protection ring 2 passes through single injection-molded set Inside steel loop shell 1, it is formed on 2 inner circumferential surface of plastics protection ring and is adapted to the external screw thread of oil well steel tube end Internal screw thread 3.

In order to guarantee the binding force between steel loop shell 1 and plastics protection ring 2, the utility model uses following technical scheme Achieve the purpose that solve technical problem.

Embodiment 1: pass through evenly arranged multiple 4 riveteds of riveted structure between the plastics protection ring 2 and steel loop shell 1 It is fastenedly connected, the riveted structure 4 includes recessed by diameter yearning 1 central axis of steel ring shell body being stamped and formed out on steel loop shell 1 Sunken riveting groove 5,5 center of riveting groove are formed with overflow hole 6, and the plastics protection ring 2 is infused in injection molding process Plastics liquid fills up riveting groove 5 by the spilling of overflow hole 6 and forms riveter 7.This riveted type structure can be good at increasing steel loop Binding force between shell 1 and plastics protection ring 2 can prevent the loose phenomenon for mutually not borrowing power to occur between the two.

Embodiment 2: in order to further increase the binding force between steel loop shell 1 and plastics protection ring 2, in the adjacent riveting It connects 1 outer surface of steel loop shell between groove 5 and is equipped with and connect muscle slot 8, the plastics protection ring 2 is molded in injection molding process Feed liquid forms company's muscle 9 that adjacent riveter 7 links together by overflow hole 6 and riveting 5 company's of flowing into muscle slot 8 of groove.

The embodiment of even muscle 9 is listed in the utility model following several:

Embodiment 3: the company of being equipped with and passes through injection molding at muscle slot 8 between the radially adjacent riveting groove 5 of 1 circumference of steel loop shell Radial direction, which is formed, after feed liquid filling connects muscle 10.Wherein the radial form for connecting muscle 10 has: one kind is as shown in Fig. 2, be in the steel ring shell 1 circumference of body is radially per the company's of being equipped with muscle slot 8 between adjacent two rivetings groove 5 and by forming radial ring after injection molding feed liquid filling Shape connects muscle 11；It is another to be set between grooves 5 as shown in figure 3, being riveted in the radially adjacent two or more of 1 circumference of steel loop shell There is even muscle slot 8 and connect muscle 12 by forming radial segments formula after injection molding feed liquid filling, embodiment shown in Fig. 3 is will radially Three riveting grooves 5 of formation are one group after filling equipped with even muscle slot 8 between three adjacent riveting grooves 5 and by injection molding feed liquid Radial segments formula connect muscle 12.The section cut away view that the radial direction connects muscle 10 is as shown in Figure 4.

Embodiment 4: the company's of being equipped with muscle slot 8 and by being molded feed liquid between the axial adjacent riveting groove 5 of the steel loop shell 1 It is formed after filling and axially connects muscle 13；Wherein the axial form for connecting muscle 13 has: a kind of as shown in figure 5, axial in the steel loop shell 1 It is upper to form axially consecutive even muscle 14 per the company's of being equipped with muscle slot 8 between adjacent two rivetings groove 5 and by being molded after feed liquid filling；Separately It is a kind of as shown in fig. 7, the company's of being equipped with muscle slot 8 and passing through between the axial two neighboring above riveting groove 5 of the steel loop shell 1 Axial segmentation formula is formed after injection molding feed liquid filling and connects muscle 15, and embodiment shown in Fig. 7 is that steel loop shell 1 is axial adjacent Two rivet the company's of setting muscle slot 8 between grooves 5 and rivet grooves 5 by forming two after injection molding feed liquid filling as one group of axial direction point Segmentation connects muscle 15.The section cut away view that the axial direction connects muscle 13 is as shown in Figure 6.

Embodiment 5: as shown in figure 8, radially being gone up between adjacent riveting groove 5 axial direction in 1 circumference of steel loop shell Equipped with even muscle slot 8 and by forming staggered even muscle 16 after injection molding feed liquid filling.

Embodiment 6: as shown in figure 9, make it is described even muscle slot 8 edge line with riveting 5 sideline of groove opposite two at concordantly and The company's of being formed muscle snap riveting grooved configuration 30 simultaneously passes through the company's of being formed muscle snap riveting band after injection molding feed liquid filling, wherein the even muscle snap riveting band Overflow hole 6 in slot structure 30 uses the row being uniformly arranged, two rows or is greater than two rows.And Figure 10 show even muscle snap riveting trough of belt There is the broken sectional of two rows of overflow holes 6 in structure 30, Figure 11 is to connect in muscle snap riveting grooved configuration 30 to have cuing open for three overflowing discharge orifices 6 Sectional view is cut, the number of overflow hole 6 can be set as needed in every row.Certainly, even muscle snap riveting grooved configuration 30 is protected in screw thread Distributed architecture in protection unit axial direction is also similarly, to be no longer illustrated with specific schematic diagram in the utility model.

Above-described embodiment lists several even arrangement of muscle and frame mode, certain the utility model and is not limited to above-mentioned institute The mode for several even muscle enumerated, can also be used company's muscle structure of oblique angle cross arrangement form, as long as in the utility model Hold done equivalence changes, should all be included within the scope of the utility model.The utility model is between adjacent riveter using company The connection of muscle structure, is implicative of each other structure to form riveter, further prevents the loosening of 1 plastics protection ring of steel loop shell de- It falls.

Embodiment 7: as shown in Figure 12-17, the shape of the riveting groove 5 selects circular groove structure 17, square groove Structure 18, oval-shaped groove structure 27, rectangular recess structure 28 or diamond groove structure, quincunx groove structure, triangle Groove structure, the shape for riveting the overflow hole 6 in groove 5 select round, rectangular, oval, rectangle, triangle, water chestnut Shape is perhaps quincunx or other shapes structure, and any shape structure and overflow of groove 5 can will be riveted in the utility model Any shape in hole 6 combines, and makes the utility model structure diversification, generalization.

Embodiment 8: improve to the structure of riveting groove 5: as shown in Figure 18-25,5 bottom surface of riveting groove is figure Planar base surface shown in 18 or riveting 5 bottom surface of groove are as shown in figure 19 to be recessed to 1 central axis of steel loop shell and make to overflow The arc-shaped recess ring structure 19 or as shown in figure 20 rectangular that 6 edge of discharge orifice is tilted to separate 1 central axis direction of steel loop shell Be recessed ring structure 20；Or riveting 5 bottom surface of groove is equipped with the protrusion protruded to 1 outer surface of steel loop shell as shown in figure 21 Ring structure 21；Or 6 center deviation of the overflow hole riveting groove 5 of riveting 5 bottom surface of groove is centrally formed eccentric overflow hole 25, The bias overflow hole 25 can deviate 5 center of the riveting groove, one border any direction, it is as shown in figure 22 be overflow hole 6 to The eccentric overflow hole 25 of upper offset, the eccentric overflow hole 25 offset downward as shown in figure 23 for overflow hole 6；Or it is described riveting it is recessed Overflow hole 6 in slot 5 is arbitrarily bloomed crotch structure 26 in self-assembling formation in circumferential 1 inside of steel ring shell body of punching metapore four, is such as schemed Shown in 17；Or the riveting groove 5 is the three overturning angle tongue type groove structures formed to 1 inside pressing and bending of steel loop shell 29, the three overturning angles tongue type groove structure 29 forms overflow hole 6 with 1 cut-off part of steel loop shell.The riveting of these forms is recessed The riveter 7 and riveting groove 5 that the structure of slot 5 can be such that plastics protection ring 2 is formed in injection molding process form depressed card Structure is closed, is deviate from so as to effectively limit riveter 7 from overflow hole 6, bonding strength is improved.

Embodiment 9: 2 sealing end of plastics protection ring is formed with convenient for hand-held hand-held slot 22, hand-held 22 outside of slot Along handling hole 23 is formed with, convenient for the dismounting using corresponding tool by this protective device on petroleum steel pipe, the steel loop shell 1 One end opposite to the open end is radially formed by bending in-flanges 24 inside.

Embodiment 10: the steel loop shell 1 is the pyramidal structure that sealing end diameter in upper end is less than lower ending opening end diameter, institute Stating plastics protection ring 2 and 1 physical fit of steel loop shell is also in up-small and down-big pyramidal structure, 2 inner periphery of plastics protection ring Internal screw thread 3 on surface is formed by lathe machining vehicle system or the single injection-molded in 2 injection moulding process of plastics protection ring.

Especially, it should be noted that: the utility model technological core is steel loop shell 1 and plastics protection ring 2 through one injection Molding is riveted together, and forms a kind of structure for increasing intensity by means of power mutually, and key technology is to 1 outer wall of steel loop shell part It is stamped and formed out the riveting groove structure for partly connecting half bore, has the riveting of even muscle to be connected by forming steel plastic band after being disposably molded Structure.

All holes manufactured in steel loop shell 1 in the utility model, the not shape, size, the direction in orientation etc. of pore The arrangement of various forms size changes, and including the arrangement of axial strip, arranged radially and various modes shown in the drawings Shape and arrangement, are included in the protection scope of the utility model.

All riveting groove structures for partly connecting half bore by being locally stamped and formed out to 1 outer wall of steel loop shell in the utility model, Regardless of direction, orientation, shape, size, size conversion, should all be included within scope of protection of the utility model.

It is obvious to a person skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and And without departing substantially from the spirit or essential attributes of the utility model, it can realize that this is practical new in other specific forms Type.Therefore, in all respects, the present embodiments are to be considered as illustrative and not restrictive, this is practical new The range of type is indicated by the appended claims rather than the foregoing description, it is intended that containing for the equivalent requirements of the claims will be fallen in All changes in justice and range are embraced therein.It should not treat any reference in the claims as limiting Related claim.

In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art The other embodiments being understood that.

Claims (9)

1. oil well steel tube end external screw thread even muscle formula thread protector, including steel loop shell (1) and plastics protection ring (2), the plastics protection ring (2) is placed on steel loop shell (1) inside by single injection-molded, and the plastics protection ring (2) is interior The internal screw thread (3) being adapted to the external screw thread of oil well steel tube end, the plastics protection ring (2) and steel are formed on circumferential surface It is fastenedly connected between toroidal shell body (1) by evenly arranged multiple riveted structure (4) riveteds, the riveted structure (4) is included in The riveting groove (5) of steel ring shell body (1) central axis recess, the riveting are yearned on steel loop shell (1) by the diameter being stamped and formed out Groove (5) center is formed with overflow hole (6), and the plastics protection ring (2) is molded feed liquid in injection molding process and passes through overflow hole (6) it overflows and fills up riveting groove (5) formation riveter (7), it is characterised in that: the steel ring shell between adjacent riveting groove (5) Body (1) outer surface is equipped with even muscle slot (8), and the plastics protection ring (2) is molded feed liquid in injection molding process and passes through overflow Hole (6) and riveting groove (5) company's of flowing into muscle slot (8) form company's muscle (9) that adjacent riveter (7) links together.

2. oil well steel tube end external screw thread according to claim 1 is existed with even muscle formula thread protector, feature In: it is filled out equipped with even muscle slot (8) between the radially adjacent riveting groove (5) of steel loop shell (1) circumference and by injection molding feed liquid Radial direction is formed after filling connects muscle (10)；Wherein, in steel loop shell (1) circumference radially per between adjacent two riveting groove (5) The company's of being equipped with muscle slot (8) and by injection molding feed liquid filling after formed it is radial ringed even muscle (11)；Or in the steel loop shell (1) Equipped with even muscle slot (8) and by forming diameter after injection molding feed liquid filling between radially adjacent more than two rivetings groove (5) of circumference Connect muscle (12) to segmented.

3. oil well steel tube end external screw thread according to claim 1 is existed with even muscle formula thread protector, feature In: after being filled equipped with even muscle slot (8) between adjacent riveting groove (5) in steel loop shell (1) axial direction and by injection molding feed liquid It is formed and axially connects muscle (13)；Wherein, per the company of being equipped between adjacent two riveting groove (5) in steel loop shell (1) axial direction Muscle slot (8) simultaneously forms axially consecutive company muscle (14) by being molded after feed liquid filling；Or the phase in steel loop shell (1) axial direction Connect muscle equipped with even muscle slot (8) between adjacent more than two rivetings groove (5) and by forming axial segmentation formula after injection molding feed liquid filling (15)。

4. oil well steel tube end external screw thread according to claim 1 is existed with even muscle formula thread protector, feature Radially the company of being equipped with muscle slot (8) and pass through note between axial adjacent riveting groove (5) in: steel loop shell (1) circumference Staggered company muscle (16) is formed after the filling of plastics liquid.

5. the even muscle formula screw thread protection dress of oil well steel tube end external screw thread described in any one of -4 according to claim 1 It sets, it is characterised in that: keep the even edge line of muscle slot (8) concordant at riveting groove (5) sideline opposite two and the company's of being formed muscle Snap riveting grooved configuration (30) simultaneously passes through the company's of being formed muscle snap riveting band after injection molding feed liquid filling, wherein the even muscle snap riveting grooved configuration (30) overflow hole (6) in uses the row being uniformly arranged, two rows or is greater than two rows.

6. oil well steel tube end external screw thread according to claim 5 is existed with even muscle formula thread protector, feature In: the shape of riveting groove (5) selects circular groove structure (17), square groove structure (18), oval-shaped groove structure (27), rectangular recess structure (28) or diamond groove structure, quincunx groove structure, triangle groove structure, the riveting The shape of overflow hole (6) in groove (5) selects round, rectangular, oval, rectangle, triangle, diamond shape or quincunx.

7. oil well steel tube end external screw thread according to claim 1 is existed with even muscle formula thread protector, feature In: riveting groove (5) bottom surface is planar base surface or the riveting groove (5) bottom surface is recessed to steel loop shell (1) central axis It falls into and makes overflow hole (6) edge to the arc-shaped recess ring structure (19) or side tilted far from steel loop shell (1) central axis direction Shape is recessed ring structure (20)；Or riveting groove (5) bottom surface is equipped with the protruding ring knot protruded to steel loop shell (1) outer surface Structure (21)；Or overflow hole (6) center deviation riveting groove (5) of described riveting groove (5) bottom surface is centrally formed eccentric overflow Hole (25), the bias overflow hole (25) can be biased to riveting one border any direction of groove (5) center；Or the riveting groove (5) overflow hole (6) in is arbitrarily bloomed crotch structure in self-assembling formation on the inside of the circumferential steel ring shell body (1) of punching metapore four (26)；Or the riveting groove (5) is to form three overturning angle tongue type groove structures to pressing and bending on the inside of steel loop shell (1) (29), the three overturning angles tongue type groove structure (29) and steel loop shell (1) cut-off part form overflow hole (6).

8. oil well steel tube end external screw thread according to claim 1 is existed with even muscle formula thread protector, feature In: plastics protection ring (2) sealing end is formed with convenient for hand-held hand-held slot (22), and hand-held slot (22) outer edge is formed with dress It unloads hole (23), described steel loop shell (1) one end opposite to the open end is radially formed by bending in-flanges (24) inside.

9. oil well steel tube end external screw thread according to claim 1 is existed with even muscle formula thread protector, feature In: the steel loop shell (1) is the pyramidal structure that sealing end diameter in upper end is less than lower ending opening end diameter, the plastics protection ring It (2) is also in up-small and down-big pyramidal structure with steel loop shell (1) physical fit, on plastics protection ring (2) inner circumferential surface Internal screw thread (3) vehicle system machined by lathe form or the single injection-molded in plastics protection ring (2) injection moulding process.