CN2584801Y

CN2584801Y - High-pressure quick joint for oil pipe

Info

Publication number: CN2584801Y
Application number: CN 02281557
Authority: CN
Inventors: 李永德; 董喜贵; 孙春波; 王军平
Original assignee: Daqing Oilfield Co Ltd
Current assignee: Daqing Oilfield Co Ltd
Priority date: 2002-11-30
Filing date: 2002-11-30
Publication date: 2003-11-05
Anticipated expiration: 2012-11-30

Abstract

The utility model provides a fast joint for high-pressure oil pipes, relating to a connecting device between pipelines, particularly a fast joint applied in oil wells. The fast joint comprises an upper joint (1), a lower joint (3), a locking sleeve (4), a spring (5) and a clamp spring (6), wherein, the outer surface of the lower joint is provided with an upper layer tooth inlay and a lower layer tooth inlay; the upper joint is sheathed on the upper end of the lower joint; the inner surface of the upper joint is provided with convex teeth which are fitted with tooth groove shapes of the upper layer tooth inlay and the lower layer tooth inlay and positioned between the upper layer tooth inlay and the lower layer tooth inlay. The clamp spring is clamped on the outer surface of the lower joint; the locking sleeve is sheathed outside the lower joint. The upper and the lower ends of the spring sheathed outside the lower joint respectively support steps on the inner surface of the locking sleeve and the clamp spring. The inner and the outer surfaces of the upper end of the locking sleeve are respectively provided with inner tooth inlays and outer tooth inlays matched with the lower layer tooth inlay and the lower convex teeth on the lower end of the upper joint. The fast joint can simultaneously bear very large axial load and high pressure, and has the locking function and the advantages of stable performance and simple structure.

Description

High-pressure oil pipe snap joint

Technical field: the utility model relates to the linkage between a kind of pipeline, the snap joint of using on particularly a kind of oil well.

Background technology: there is following problem in the snap joint of using on the oil field in the past: the one, can not bear very big axial load and high pressure simultaneously; The 2nd, rotating freely the easily disadvantage of generator tube splice failure of back.

The utility model content: the utility model can not bear very big axial load and high pressure simultaneously for solving existing snap joint, and the problem of splice failure easily takes place and design a kind of high-pressure oil pipe snap joint, this snap joint comprises top connection 1, lower contact 3, lock sleeve 4, spring 5, jump ring 6, the external surface of lower contact 3 is provided with upper strata tooth embedding 3-1 and the tooth embedding 3-2 of lower floor, top connection 1 is sleeved on the upper end of lower contact 3, the double wedge 1-1 that the inner surface of top connection 1 has the shape with the alveolus 3-3 of upper strata tooth embedding 3-1 and the tooth embedding 3-2 of lower floor to match, double wedge 1-1 is between upper strata tooth embedding 3-1 and the tooth embedding 3-2 of lower floor, jump ring 6 is clamped on the external surface of lower contact 3, lock sleeve 4 is sleeved on the outside of lower contact 3, the upper and lower side that is sleeved on the spring 5 of lower contact 3 outsides withstands on respectively on the step 4-1 and jump ring 6 of lock sleeve 4 inner surfaces, and the surfaces externally and internally of the upper end of lock sleeve 4 has inner teeth 4-2 and the outer tooth embedding 4-3 that matches with the lower raised teeth 1-2 of tooth embedding 3-2 of lower floor and top connection lower end respectively.The double wedge 1-1 of top connection 1 during use inwardly is pushed into spacing place with the tooth embedding of lower contact 3 with the method that male and female cooperates, adapter assembly is to tooth embedding and double wedge 1-1 relative position about rotating again, at last lock sleeve 4 rotation being made its inner teeth 4-2 and outer tooth embedding 4-3 reach male and female with the lower raised teeth 1-2 of the tooth embedding 3-2 of lower floor of lower contact 3 and top connection 1 respectively cooperates, and its position is remained unchanged, thereby reach the locking purpose that upper and lower joint combines together.The pipe that connects with this snap joint can be just, contrary rotation the and phenomenon that pipe takes off can not occur.This snap joint can be used the oil field down-hole oil tube and be connected, can replace tubing coupling, the tubing round thread that it can effectively avoid causing owing to removal torque is excessive when underground work ruptures and the too small leakage phenomena that causes tubing round thread of torque wrench moment, reduced greatly since on unload box cupling and injury that oil pipe is caused, and shortened the activity duration, reduced working strength of workers.This snap joint can be born very big axial load and high pressure simultaneously, and the pipe after the connection can freely be placed and the disadvantage that breaks away from of generator tube joint not, and has locking function, and it also has stable performance, advantage of simple structure.The connection that this snap joint is applied to surface line can effectively prevent the leakage of joint, and connection speed is fast, applied range.

Description of drawings: Fig. 1 is a structural representation of the present utility model, Fig. 2 is the structural representation of top connection 1, Fig. 3 is the A-A sectional view of Fig. 2, Fig. 4 is the B-B sectional view of Fig. 2, Fig. 5 is the structural representation of lower contact 3, and Fig. 6 is the C-C sectional view of Fig. 5, and Fig. 7 is the D-D sectional view of Fig. 5, Fig. 8 is the structural representation of lock sleeve 4, and Fig. 9 is the E-E sectional view of Fig. 8.

The specific embodiment: the snap joint of present embodiment is made up of top connection 1, sealing ring 2, lower contact 3, lock sleeve 4, spring 5, jump ring 6, spill sealing ring 7.The external surface of lower contact 3 is provided with upper strata tooth embedding 3-1 and the tooth embedding 3-2 of lower floor, top connection 1 is sleeved on the upper end of lower contact 3, the double wedge 1-1 that the inner surface of top connection 1 has the shape with the alveolus 3-3 of upper strata tooth embedding 3-1 and the tooth embedding 3-2 of lower floor to match, double wedge 1-1 is between upper strata tooth embedding 3-1 and the tooth embedding 3-2 of lower floor, jump ring 6 is clamped on the external surface of lower contact 3, lock sleeve 4 is sleeved on the outside of lower contact 3, the upper and lower side that is sleeved on the spring 5 of lower contact 3 outsides withstands on respectively on the step 4-1 and jump ring 6 of lock sleeve 4 inner surfaces, and the surfaces externally and internally of the upper end of lock sleeve 4 has inner teeth 4-2 and the outer tooth embedding 4-3 that matches with the lower raised teeth 1-2 of tooth embedding 3-2 of lower floor and top connection lower end respectively.Between lock sleeve 4 and lower contact 3, be provided with spill sealing ring 7, between top connection 1 and lower contact 3, be provided with sealing ring 2.

Claims

1, high-pressure oil pipe snap joint, it comprises top connection (1), lower contact (3), lock sleeve (4), spring (5), jump ring (6), the external surface that it is characterized in that lower contact (3) is provided with upper strata tooth embedding (3-1) and lower floor's tooth embedding (3-2), top connection (1) is sleeved on the upper end of lower contact (3), the double wedge (1-1) that the inner surface of top connection (1) has the shape with the alveolus (3-3) of upper strata tooth embedding (3-1) and lower floor's tooth embedding (3-2) to match, double wedge (1-1) is positioned between upper strata tooth embedding (3-1) and the lower floor's tooth embedding (3-2), jump ring (6) is clamped on the external surface of lower contact (3), lock sleeve (4) is sleeved on the outside of lower contact (3), the upper and lower side that is sleeved on the spring (5) of lower contact (3) outside withstands on respectively on the step (4-1) and jump ring (6) of lock sleeve (4) inner surface, and the surfaces externally and internally of the upper end of lock sleeve (4) has inner teeth (4-2) and the outer tooth embedding (4-3) that matches with the lower raised teeth (1-2) of lower floor's tooth embedding (3-2) and top connection lower end respectively.

2, high-pressure oil pipe snap joint according to claim 1 is characterized in that being provided with spill sealing ring (7) between lock sleeve (4) and lower contact (3).

3, high-pressure oil pipe snap joint according to claim 1 and 2 is characterized in that being provided with sealing ring (2) between top connection (1) and lower contact (3).