CN2538942Y

CN2538942Y - Eccentrically worn prevention sucker rod jointing hoop

Info

Publication number: CN2538942Y
Application number: CN 02208347
Authority: CN
Inventors: 赵道远
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-03-22
Filing date: 2002-03-22
Publication date: 2003-03-05
Anticipated expiration: 2012-03-22

Abstract

The utility model relates to a camber wear preventive joint hoop of sucker rod for oil field pumping well, which can reduce the friction coefficient during the sucker rod turning. A set of evenly-distributed rolling bearings (4, 5) are arranged along the circumferential direction of a joint hoop (1) with a nylon cover and three evenly-distributed convex prisms (6) are formed along the axial direction of the nylon cover (3). A snap spring (2) is hoped on one end of the nylon cover (3). Two groups of rolling bearings can be arranged on the two circumferential directions of the joint hoop (1) and can be arranged vertically upper-to-lower correspondingly, namely the planes of the upper rolling bearings and the lower rolling bearings are coplanar. One group of the rolling bearings can also be arranged horizontally and the other group can be arranged vertically. The two groups of the rolling bearings can also be arranged horizontally and distributed evenly at space along the circumferential direction. The amount of each group can be three. The utility model has the advantages of small friction coefficient and low resistance due to rolling bearings, therefore can reduce camber wear and achieve design purpose.

Description

The eccentric wear prevention pumping rod box cupling

(1) technical field:

The utility model relates to the eccentric wear prevention pumping rod box cupling in the oilfield pumping well.

(2) background technology:

Under in the field produces well oil pipe is arranged, with sucker rod in the oil pipe under the oil rig lower going-into-well, the rotation by sucker rod drives the down-hole oil rig crude oil is returned out ground from oil pipe.Because oil well is not to be peupendicular hole, curved portion is arranged, thereby the sucker rod under the lower going-into-well is between two parties on the wellbore centre axis, and with its bending, contact frictional resistance with oil pipe in crooked turning point big, produces serious wearing and tearing, sucker rod can be threaded off and rupture after permanent, causes down-hole accident.The anti-eccentric wear of sucker rod mostly adopts the mode that nylon jacket is installed on sucker rod to carry out at present.This mode exist application life short (application life of most of nylon jacket is about 4 months), oil pumper working resistance greatly, come off easily, install and dismantle difficult disadvantage such as loaded down with trivial details.

(3) utility model content:

Technical problem to be solved in the utility model is at the problem that exists in the background technology, and a kind of eccentric wear prevention pumping rod box cupling that reduces friction factor is provided.

The invention for solving the technical problem can reach by following technical solution: upwards inlay one group of uniform roller bearing in one week of box cupling of containing nylon jacket, axially going up of this nylon jacket forms 3 uniform fin bodies, and at an end hoop of nylon jacket jump ring arranged.

In such scheme, can upwards inlay two groups of roller bearings in two weeks of box cupling; Two groups of roller bearings can vertically be placed and upper and lower correspondence, and promptly the plane of upper and lower roller is on an axial vane surface; But one group of roller horizontal positioned in two groups of roller bearing, another group is placed for vertical; But two groups of roller bearing horizontal positioned and week upwards uniformly at intervals; Every group of roller bearing can be 3.Because of bearing is a rolling element, its friction factor is little, and resistance is also little, adopts this rod collar can reduce eccentric wear, reaches purpose of design.

The utility model is compared with the above-mentioned background technology can have following beneficial effect: pinch roll and guide sleeve are installed on the box cupling main body, can be solved the problem of sucker rod partial wear effectively.This patent project organization is simply compact, and working resistance is big, and long service life is installed and convenient disassembly, has not only improved the operating efficiency of oil pumper, reduces energy consumption.Also improved efficiency simultaneously, reduced labour intensity, can reduce production costs widely, for enterprise brings immeasurable economic benefit and social benefit.

(4) description of drawings:

Accompanying drawing 1 is this box cupling half cut-away view;

Accompanying drawing 2 is Fig. 1 vertical views;

Accompanying drawing 3 is A-A sectional views on Fig. 1;

Accompanying drawing 4 be on Fig. 3 P to view;

Accompanying drawing 5 is that two groups of roller bearing half cut-away views are installed.

(5) specific embodiment:

Below in conjunction with the drawings and specific embodiments will the utility model is described in further detail:

, contain box cupling 1 and go up nylon jacket 3 in conjunction with shown in Figure 5 by accompanying drawing 1, it is characterized in that: upwards inlay one group of uniform roller bearing (4,5) in 1 one weeks of box cupling; Nylon jacket 3 axially on form 3 uniform fin bodies 6, and jump ring 2 is arranged at one end hoop.

In such scheme, can upwards inlay two groups of roller bearings in 1 two weeks of box cupling; Two groups of roller bearings can vertically be placed and upper and lower correspondence, and promptly the plane of upper and lower roller is on an axial vane surface; But one group of roller horizontal positioned in two groups of roller bearing, another group is placed for vertical; But two groups of roller bearing horizontal positioned and week upwards uniformly at intervals; Every group of roller bearing can be 3.Because of bearing is a rolling element, its friction factor is little, and resistance is also little, adopts this rod collar can reduce eccentric wear, reaches purpose of design.

Claims

1, a kind of eccentric wear prevention pumping rod box cupling that relates to oilfield pumping well contains box cupling (1) and goes up nylon jacket (3), it is characterized in that: upwards inlay one group of uniform roller bearing (4,5) in (1) one week of box cupling; Form 3 uniform fin bodies (6) axially going up of nylon jacket (3), and jump ring (2) is arranged at one end hoop.

2, box cupling according to claim 1 is characterized in that: can upwards inlay two groups of roller bearings in (1) two week of box cupling.

3, box cupling according to claim 2 is characterized in that: two groups of roller bearings can vertically be placed and upper and lower correspondence, and promptly the plane of upper and lower roller is on an axial vane surface.

4, box cupling according to claim 3 is characterized in that: but one group of roller horizontal positioned in two groups of roller bearing, and another group is placed for vertical.

5, box cupling according to claim 4 is characterized in that: but two groups of roller bearing horizontal positioned and week upwards uniformly at intervals.

6, box cupling according to claim 5 is characterized in that: every group of roller bearing can be 3.