CN201106413Y

CN201106413Y - Liner breakdown elastic locating centralizer

Info

Publication number: CN201106413Y
Application number: CNU2007200296364U
Authority: CN
Inventors: 朱泽军; 刘东亮; 游龙谭; 徐洪生; 王淑俊
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-10-23
Filing date: 2007-10-23
Publication date: 2008-08-27
Anticipated expiration: 2017-10-23

Abstract

The utility model relates to an inner casing decomposable flexible locating centering guide, which has the technical proposal that the utility model is mainly composed of a rod body, a pressing cap of an inner core, the inner core, a centering guide main body, a friction block, an elastic element and a locating shim, and inner holes of the pressing cap of the inner core and the centering guide main body penetrate the rod body; the periphery of the centering guide main body is provided with an oil flow groove, and the friction block and the elastic element are located in a notch of a stiffener of the centering guide main body with the locating shim; the inner core is detachable and is bivalve or multivalve, and one end of the detachable inner core is provided with a circular bead to lean at the end of a thread button of the centering guide main body; the pressing cap of the inner core is connected with one end of the centering guide main body in a movable way, and in this way, the detachable inner core can relatively rotate and slide oppositely to the rod body in the inner cavity of the centering guide main body. Both are in the clearance fit, and inner casing decomposable flexible locating centering guide has the beneficial effects that the tensile strength and the strength of a righting part of the rod body is ensured, the installation and the replacement are convenient, the effect of the prevention of the eccentric wearof a sucker rod is good, the eccentric wear of the sucker rod does not appear basically and the pump detection period is improved obviously.

Description

Interior cover breakdown elasticity location centralizer

One, technical field:

The utility model relates to a kind of oil production equipment of petroleum industry, particularly relates to a kind of interior cover breakdown elasticity location centralizer.

Two, background technology:

The oil field has entered the high water-cut development stage at present, and great changes have all taken place pit shaft situation and output fluidity matter etc., and sucker rod pump system works environment progressively worsens, and has aggravated the rod and tube partial-wear degree.

At on-the-spot eccentric wear present situation, adopting anti-eccentric wear measure at present mainly is to adopt oil pumping rod centering device, wear-resistant pair etc.The oil pumping rod centering device weak effect, the cycle is short, strengthens polished rod load; The anti-eccentric wear pair of sucker rod, on-the-spot subject matter are that stuck phenomenon appears in the centralizer body and the body of rod easily, are equivalent to common eccentric wear joint hoop after stuck; The cost height, price is more expensive, and scope is promoted the use of at the scene of influence.Though the resilient support centralizer of using can address the above problem at present, directly, cause body of rod screw thread end intensity low, easily fracture at body of rod two ends processing screw thread; Though another open flume type location erection device is realized replaceable operation on the pier nose body of rod, because the centralizer body fluting has reduced the intensity of installing, under situation about being hampered, cause body to split under the effect of pier nose easily.

Three, summary of the invention:

The purpose of this utility model is exactly the above-mentioned defective that exists at prior art, and a kind of interior cover breakdown elasticity location centralizer of making simple, as to have improved device tensile strength is provided.

Its technical scheme is: mainly by the body of rod, the inner core pressure cap, inner core, the centralizer main body, brake pad, flexible member and locating shim are formed, the endoporus of inner core pressure cap and centralizer main body passes the body of rod, the periphery of centralizer main body has the stream oil groove, brake pad and flexible member are positioned in the reinforcing rib fluting of centralizer main body with locating shim, described inner core is split type, adopt two lobes or many lobes to form, one end of split type inner core has shoulder, lean against the screw thread end of centralizer main body, flexibly connect with inner core pressure cap and centralizer main body one end, split type like this inner core can relatively rotate at the inner chamber of centralizer main body with the relative body of rod and slide the two matched in clearance.

In addition, the two ends of brake pad are provided with chamfering, are convenient to install.

The beneficial effects of the utility model are: guaranteed the tensile strength of the body of rod, guaranteed to set upright the intensity of part again, and installed, change conveniently; The anti-sucker rod partial wear of this device is effective, and sucker rod substantially can eccentric wear, and pump detection period significantly improves.

Four, description of drawings:

Accompanying drawing 1 is a sectional view of the present utility model;

Accompanying drawing 2 is A-A sectional views of the present utility model.

Five, the specific embodiment:

In conjunction with the accompanying drawings, the utility model will be further described:

Its technical scheme is: mainly forms by the body of rod 1, inner core pressure cap 2, inner core 3, centralizer main body 4, brake pad 5, flexible member 6 and locating shim 7,

The endoporus of inner core pressure cap 2 and centralizer main body 4 passes the body of rod 1, the periphery of centralizer main body 4 has the stream oil groove, brake pad 5 is positioned in the reinforcing rib fluting of centralizer main body 4 with flexible member 6 usefulness locating shims 7, described inner core 3 is split type, adopt two lobes or many lobes to form, one end of split type inner core 3 has shoulder, lean against the screw thread end of centralizer main body 4, flexibly connect with inner core pressure cap 2 and centralizer main body 4 one ends, split type like this inner core 3 can relatively rotate at the inner chamber of centralizer main body 4 with the relative body of rod and slide the two matched in clearance.The two ends of brake pad 5 are provided with chamfering.

The endoporus of inner core pressure cap 2 and centralizer main body 4 passes the pier nose of the body of rod 1, and centralizer main body 4 has the stream oil groove, and brake pad 5 and flexible member 6 as support spring, are positioned in the reinforcing rib fluting of centralizer main body 4 with locating shim 7 in advance,

Brake pad is monolateral in the groove of reinforcing rib certain stroke, during installation, earlier the pier nose that centralizer main body and inner core pressure cap 2 are never installed box cupling one end passes, on the body of rod 1, split type inner core 3 is buckled on the body of rod, penetrate the endoporus of centralizer main body then, one end of inner core has shoulder, lean against the screw thread end of centralizer main body 4, flexibly connect with inner core pressure cap 2 and centralizer main body 4 one ends, split type like this inner core 3 can relatively rotate at the inner chamber of centralizer main body 4 with the relative body of rod and slide the two matched in clearance.

Inner core has wear-resisting, wear-resistant performance through specially treated.When needing to change inner core, only need turn on by cap, take out inner core, the inner core that more renews gets final product.So just can supporting centralizer be installed directly on sucker rod or other pier nose bodies of rod, promptly guarantee the tensile strength of the body of rod, guarantee to set upright the intensity of part again, and installed, change conveniently.

Split type inner core is through polishing, preservative treatment, and friction factor reduces, and its anti-wear performance improves.Designed suitable fit clearance between the split type inner core and the wear-resistant body of rod, designed suitable dimensions, avoided the stuck phenomenon that on the body of rod, can not slide relatively of centralizer body in oil pumping process at the two ends of inner core.Be lowered in the oil pipe with sucker rod then, during oil pumping the outer brake pad of supporter in the effect lower support of flexible member on tube inner wall, make the relative tube inner wall of supporter motionless, make the sucker rod body of rod be in the oil pipe center simultaneously, if the relative oil pipe of sucker rod center is offset, when the relative sucker rod body of rod of supporter slides, force power placed in the middle for one of the body of rod, simultaneously since the external diameter of supporter greater than the rod collar external diameter, therefore rod collar can not come in contact friction with tube inner wall, prevents side-abrasion of rod string.The anti-sucker rod partial wear of this device is effective, and sucker rod substantially can eccentric wear, and pump detection period significantly improves.

Claims

1, cover breakdown elasticity location centralizer in a kind of, mainly by the body of rod (1), inner core pressure cap (2), inner core (3), centralizer main body (4), brake pad (5), flexible member (6) and locating shim (7) are formed, the endoporus of inner core pressure cap (2) and centralizer main body (4) passes the body of rod (1), the periphery of centralizer main body (4) has the stream oil groove, brake pad (5) is positioned in the reinforcing rib fluting of centralizer main body (4) with flexible member (6) with locating shim (7), it is characterized in that: described inner core (3) is for split type, adopt two lobes or many lobes to form, one end of split type inner core (3) has shoulder, lean against the screw thread end of centralizer main body (4), flexibly connect with inner core pressure cap (2) and centralizer main body (4) one ends, split type like this inner core (3) can relatively rotate at the inner chamber of centralizer main body (4) with the relative body of rod and slide the two matched in clearance.

2, interior cover breakdown elasticity according to claim 1 is located centralizer, and it is characterized in that: the two ends of brake pad (5) are provided with chamfering.