CN201095960Y

CN201095960Y - Anti-corrosive petroleum case pipe joint

Info

Publication number: CN201095960Y
Application number: CNU2007201955617U
Authority: CN
Inventors: 李永安
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-11-02
Filing date: 2007-11-02
Publication date: 2008-08-06
Anticipated expiration: 2017-11-02

Abstract

A rotproof petroleum casing pipe joint used for the oil production mechanical field consists of a casing pipe coupling body and a rotproof stuffing, wherein, the rotproof stuffing is positioned at the center part of the casing pipe coupling body, the two ends of the casing pipe coupling body have taper threaded holes matched with the head of the petroleum casing pipe, the center part of the casing pipe coupling body has a groove with a dovetail, the groove is connected with the dovetail at the center part of the rotproof stuffing by heat pressing, the rotproof stuffing is made of nylon nano rotproof materials, which guarantees the reliability and the wearing property of the sealing of the rotproof petroleum casing pipe joint and the petroleum casing pipe, thereby reducing the stress corrosion and the electrochemical corrosion of a flow string and the rotproof petroleum casing pipe joint conveniently and efficiently, prolonging the use cycle and saving a large amount of long strings and the petroleum casing pipes; therefore, the rotproof petroleum casing pipe joint can be widely applicable to the oil production and belongs to the economy product.

Description

Anticorrosion petroleum sleeve joint

[technical field]

The utility model relates to a kind of anticorrosion petroleum sleeve joint, relates in particular to the corrosion that can reduce petroleum casing pipe and casing joint in a kind of oil exploitation well effectively, prolongs the life-span of petroleum casing pipe and casing joint, anticorrosion petroleum sleeve joint.

[background technology]

Existing petroleum casing pipe head gas thread and union adopt the surface anticorrosion coating technology more, at the petroleum casing pipe screw thread with after union connects, surface anticorrosion coating majority is subjected to destruction in various degree in the contact site, in well under the mal-condition, stress corrosion and electrochemical corrosion are very active, the corrosion of petroleum casing pipe head gas thread and union is very serious, and annual to scrap steel countless for this. still there is not effective way at present.

On the technical data basis of collecting domestic and international sucker rod casing coupling, we have invented a kind of anticorrosion petroleum sleeve joint, thereby have satisfied the requirement of various oil recovery operating modes preferably.

[utility model content]

It is a kind of simple in structure, reasonable in design that the purpose of this utility model is to provide, and Corrosion Protection is good, and cost is low, and the economical and practical anticorrosion petroleum sleeve joint that can match in excellence or beauty with the foreign oil casing joint is widely used in recovering the oil and produces.

The anticorrosion petroleum sleeve joint of the utility model, form by casing coupling body (1) anticorrosive packing (2), anticorrosive packing (2) places the centre of casing coupling body (1), anticorrosive packing (2) is the nylon nano anti-corrosion material, wherein: the taper thread hole that meet GB standard of the two ends of casing coupling body (1) for matching with petroleum casing pipe (3) head, the centre is the groove of band dovetail, connect with the dovetail hot pressing in anticorrosive packing (2) centre, the endoporus two ends of anticorrosive packing (2) are and the consistent taper thread of box cupling body (1), hot pressing connects, the seal length of the taper thread of box cupling body (1) and anticorrosive packing (2) is L, the L=5-20 millimeter, D is the internal diameter of anticorrosive packing (2), and D must not be less than the inner diameter d of petroleum casing pipe (3), and the width at D place is the 10-30 millimeter.

The anticorrosion petroleum sleeve joint of the utility model, wherein: the surface sections at anticorrosive packing (2) D place is three kinds of forms, and a kind of is the reticulate pattern cross-sections surfaces, and second kind is the wave cross-sections surfaces, and the third is the profile of tooth cross-sections surfaces.

The anticorrosion petroleum sleeve joint of the utility model can be according to various oil recovery operating mode, select different body and anticorrosive packing, can reduce the stress corrosion and the electrochemical corrosion of long string and anticorrosion petroleum sleeve joint easily effectively, prolong life cycle, save a large amount of long strings and petroleum casing pipe, thereby reached the purpose that reduces cost for oil production.

[description of drawings]

Fig. 1 is the anticorrosion petroleum sleeve joint structural representation of the utility model.

Fig. 2 is the anticorrosion petroleum sleeve joint practical application of a utility model schematic diagram.

[specific embodiment]

Below in conjunction with Fig. 2 the anticorrosion petroleum sleeve joint of the utility model embodiment is described further: among the figure: (1) is the casing coupling body, (2) be anticorrosive packing, (3) be petroleum casing pipe, L is the taper thread of box cupling body (1) and the seal length of anticorrosive packing (2), D is the internal diameter of anticorrosive packing (2), and d is the internal diameter of petroleum casing pipe (3).

Anticorrosion petroleum sleeve joint is by casing coupling body (1), anticorrosive packing (2) is formed (see figure 1), the two ends car of casing coupling body (1) is made the standard compliant taper thread that matches with the sleeve pipe head, the centre is the groove of band dovetail, use ferrule mold directly on casing coupling body (1), to make anticorrosive packing (2) with the method for hot extrusion, what anticorrosive packing (2) used is the nylon nano anti-corrosion material, anticorrosive packing (2) places the centre of casing coupling body (1), the cylindrical of anticorrosive packing (2) and two sides are the flute profile with the close-fitting band dovetail of box cupling body (1), its endoporus two ends are and the consistent taper thread of box cupling body (1), the seal length of the taper thread of box cupling body (1) and anticorrosive packing (2) is L, the L=16 millimeter, D is the endoporus of anticorrosive packing (2), D must not be less than the inner diameter d of petroleum casing pipe, the width at D place is 30 millimeters, the surface sections at anticorrosive packing (2) D place is for being the wave cross-sections surfaces, ferrule mold is removed in the cooling back, and anticorrosion petroleum sleeve joint is made.

Anticorrosion petroleum sleeve joint connects petroleum casing pipe (3) during use, because the taper thread head outer diameter of petroleum casing pipe (3) is less than the metal threaded part of casing coupling body (1), so the anticorrosion of the taper thread head of petroleum casing pipe (3) can not destroy, because what anticorrosive packing (2) used is the nylon nano anti-corrosion material, the reliability and the durability of anticorrosion petroleum sleeve joint and petroleum casing pipe (3) sealing have been guaranteed, thereby the stress corrosion and the electrochemical corrosion of flow string and anticorrosion petroleum sleeve joint have been reduced easily effectively, prolong life cycle, saved a large amount of long strings.

The anticorrosion petroleum sleeve joint of the utility model, the use in the oil field has obtained good effect, has prolonged the life-span of petroleum casing pipe and casing joint effectively, has obtained good economic benefits, belongs to economy type invention product.

Claims

1. anticorrosion petroleum sleeve joint, form by casing coupling body (1) anticorrosive packing (2), anticorrosive packing (2) places the endoporus centre of casing coupling body (1), anticorrosive packing (2) is the nylon nano anti-corrosion material, it is characterized in that: the taper thread hole of the two ends of casing coupling body (1) for matching with petroleum casing pipe (3) head, the centre is the groove of band dovetail, connect with the dovetail hot pressing in anticorrosive packing (2) centre, the endoporus two ends of anticorrosive packing (2) are and the consistent taper thread of box cupling body (1), hot pressing connects, the seal length of the taper thread of box cupling body (1) and anticorrosive packing (2) is L, L is the 5-20 millimeter, D is the internal diameter of anticorrosive packing (2), and D must not be less than the inner diameter d of petroleum casing pipe (3), and the width at D place is the 10-30 millimeter.

2. anticorrosion petroleum sleeve joint according to claim 1 is characterized in that: the surface sections at anticorrosive packing (2) D place is three kinds of forms, and a kind of is the reticulate pattern cross-sections surfaces, and second kind is the wave cross-sections surfaces, and the third is the profile of tooth cross-sections surfaces.