CN2145258Y

CN2145258Y - Self-sealed anti-disjoint join

Info

Publication number: CN2145258Y
Application number: CN 92236700
Authority: CN
Inventors: 张百安
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-10-08
Filing date: 1992-10-08
Publication date: 1993-11-03
Anticipated expiration: 2002-10-08

Abstract

The utility model belongs to a connecting piece for multifunctional hollow sucker rods used in oil pumping and producing operations in oil fields. The technology is provided to solve leakage duo to the bad sealability of connection positions and well releasing accidents due to screw threads loosing and releasing, and both the leakage and the accidents are existing in prior art. A piece of dual-cone sleeve 2 is additionally installed between the end holes of two multifunctional hollow sucker rods 1 in an improved joint 3, and each part is made to produce relative deformation by clink force formed in the process of screwing to achieve the aim of despinning, sealing and self-locking. The using sealability of the utility model can reach 35MPa with no leakage, and the utility model can be used for oil producing operation under high temperature and high pressure and various special operations.

Description

Self-sealed anti-disjoint join

The utility model belongs to the link of the multi-functional hollow rod that uses in the extraction operation of oil field.

Multi-functional hollow rod box cupling in present the use generally adopts rubber sealing, quickens because cushion rubber is aging in the hot environment, reaches the factors such as mechanical injuries when installing, and sealing is damaged.Add that screw connection point does not have self-locking property, often because of leaking, get loose and cause the underproduction and take off the well accident in the use.

Release of the present utility model is in order to make multi-functional hollow rod after the assembling when possessing good sealing, also to possess the anticreep performance of certain racemization self-locking.

The utility model has adopted the new structure with higher reliability, its basic functional principle is with multi-functional hollow rod two ends endoporus, be processed into taper hole with certain angle, during assembling in the box cupling that size makes improvements slightly, between the taper hole of two multi-functional hollow rods, install a two-taper ferrule 2 additional, screw.In the certain position of both sides, the big footpath of two-taper ferrule, if some unidirectional cutting blades, process obtains each parts of strict control, in screwing process under the effect of clink power, make taper hole, tapered sleeve produce relative deformation, screw thread is paid become the state of closely cooperating, outer cone forms the tight wedging state of large tracts of land gradually in making in the deformation process, and sealing and racemization self-lock ability reach optimum state when being screwed into.When derotation power during greater than self-lock force, the unidirectional cutting blade incision adjacent component on the two-taper ferrule 2 is because the increase of derotation resistance makes it prevent that effectively screw thread from getting loose.

Advantage of the present utility model is, has adopted to increase substantially sealability, effectively prevents the two-taper ferrule structure that screw thread gets loose, and reaches the 35MPa leakproof in the use, reaches 40MPa in the test.

1 is the multi-functional hollow rods in top and the bottom in the accompanying drawing, and 2 for having the two-taper ferrule of unidirectional cutting blade, and 3 are the box cupling body after improving.

The utility model if can strict execution graph sizing in implementation process, form and position tolerance, and processing and Technology for Heating Processing, and with " self sealss solid forging moulding hollow rod " supporting use, can obtain optimum mechanical performance, with the perfect combination of optimal seal.

Claims

1, self sealss anticreep box cupling is characterized in that having adopted conical surface extruded sealing structure, mainly changes box cupling body 3 slightly by size, reaches one in the certain position of both sides, big footpath, establishes the two-taper ferrule 2 of some unidirectional cutting blades and forms.

2, as the described self-styled anticreep box cupling of claim one, it is characterized in that having adopted and can play racemization sealing self-locking action, in the certain position of both sides, big footpath, have the two-taper ferrule of some unidirectional cutting blades.

3,, it is characterized in that having adopted process to obtain strict control, and made the box cupling body of suitable modification as the described self sealss anticreep of claim one box cupling.