CN201225145Y

CN201225145Y - Rolling wheel righting device of righting over core type well logging instrument

Info

Publication number: CN201225145Y
Application number: CNU2008200799476U
Authority: CN
Inventors: 侯洪为; 冯永仁; 尚景玉; 揭辉; 秦才会; 廖胜军
Original assignee: China Oilfield Services Ltd; China National Offshore Oil Corp CNOOC
Current assignee: China Oilfield Services Ltd; China National Offshore Oil Corp CNOOC
Priority date: 2008-04-15
Filing date: 2008-04-15
Publication date: 2009-04-22
Anticipated expiration: 2018-04-15

Abstract

The utility model discloses a roller centralizer of a logging instrument of a centre yarn type, which comprises a basal body and a roller, wherein a cambered roller groove is axially arranged on the external circumference of the basal body, and the roller is arranged in the cambered roller groove; an upper joint and a lower joint used for being connected with the logging instrument are respectively arranged at both ends of the basal body, and a centre yarn hole used for a centre yarn to pass by is also arranged on the basal body. Due to the arrangement of the cambered roller groove on the external circumference of the basal body and the mounting of the roller matched with a gap between sleeves in the groove, the whole centralizer can have compact structure, smooth liquid discharge, small solid phase deposition and good reliability. In addition, the utility model also has the following advantages that the outer surface of the roller is designed to be cambered, and an arc radius in the axial direction is equal to the radius of the inner wall of the sleeve so as to reduce the resistance of the roller falling in a cased well with great inclination and improve the logging operation efficiency.

Description

A kind of core formula logger roller erection device of crossing

Technical field

The utility model relates to a kind of roller erection device that is used for big gradient slim-hole cased hole logging instrument.

Background technology

Logger is bigger to sleeve surface pressure in the big gradient slim-hole cased well cementing quality logging operation, and frictional force is bigger between the sleeve pipe, casing inner diameter is less, and the instrument comparison difficulty of going into the well needs to use bearing capacity centralizer strong, that friction factor is little that instrument is set upright.Present slidingtype centralizer structure complexity, the heaviness of using, on-the-spot dismounting difficulty; And friction factor is big, to the internal surface of sleeve pipe serious wear; The instrument difficulty of going into the well, the fault rate height.

The utility model content

The technical problems to be solved in the utility model provides that a kind of friction factor is little, bearing capacity is strong, adapt to the core formula of the crossing logger erection device of minor diameter sleeve pipe inclined shaft.

In order to address the above problem, the utility model provides a kind of core formula logger roller erection device of crossing to comprise: matrix and roller, on the excircle of this matrix, offer garden arc roller groove vertically, roller is arranged in this circular arc roller groove, be respectively arranged with at the two ends of matrix and be used for the top connection and the lower contact that link to each other with logger, also be provided with on the described matrix be used for that heart yearn passes through cross the heart yearn hole.

Preferably, described roller and roller groove are more than three groups, and circumferentially uniform along described matrix.

Preferably, described roller along roller shaft to external surface be the garden arc, the arc radius of this garden arc is identical with the radius of internal surface of sleeve pipe.

Preferably, circumferential roller envelope circular diameter and the measured sleeve bore that distributes in described edge matches.

The utility model is by offering the circular arc roller groove on the excircle of matrix, and the roller that cooperates with shell clearance is installed in groove, not only can make whole erection device compact conformation, and discharge opeing is smooth and easy, and solid precipitation is few, good reliability.Have following advantage in addition: 1) the roller external surface adopts the circular arc design, and arc radius in axial direction is identical with the radius of internal surface of sleeve pipe, has reduced the resistance when roller is gone into the well in big gradient cased well, has improved the operating efficiency of well logging.

Description of drawings

Fig. 1 is the utility model cross-sectional view;

Fig. 2 be among Fig. 1 A-A to schematic cross-section;

Fig. 3 is installed in schematic diagram in the sleeve pipe for the utility model.

The specific embodiment

As shown in Figure 1, 2, 3, the utility model comprises: matrix 1 and roller 2, on the excircle of this matrix 1, offer garden arc roller groove 3 vertically, roller 2 is arranged in this circular arc roller groove 3, envelope circular diameter and tested sleeve pipe 10 internal diameters along the roller 2 that circumferentially distributes match, and promptly are slightly less than tested sleeve pipe 10 internal diameters.Roller and roller groove are four groups, and circumferentially uniform along matrix 1.

Be respectively arranged with at the two ends of matrix 1 and be used for the top connection 5 and the lower contact 4 that link to each other with logger, also be provided with on the matrix 1 be used for that heart yearn passes through cross heart yearn hole 9.When centralizer is serially connected in instrument string centre, top connection 5 is used for being connected with the joint of logger above it (not shown go out), transmission line female plug seat 7 is installed, the electrical plug butt joint of installing in the lower contact of the instrument that on it, is connected in series by the plug that is inserted on the transmission line female plug seat 7 in the top connection 5; The joint (not shown go out) that lower contact 4 is used on the logger with its below is connected, transmission line male plug 6 is installed in the lower contact 4, by being inserted in the electrical plug butt joint of installing in plug and the instrument top connection that it is connected in series below on the transmission line male plug 6, cross heart yearn and passed heart yearn hole 9.Like this, just that the utility model erection device is upper and lower instrument is communicated with on circuit.

The utility model can series connection in the instrument string, diameter dimension is little; Centralizer is crossed had heart yearn to connect erection device electrical plug up and down in the heart yearn hole 9, when erection device was inserted the logger string, the power-on and power-off plug docked with the electrical plug of upper and lower instrument respectively, thereby was communicated with the signal of telecommunication.

Claims

1, a kind of core formula logger roller erection device of crossing, it is characterized in that, comprise: matrix and roller, on the excircle of this matrix, offer garden arc roller groove vertically, roller is arranged in this circular arc roller groove, be respectively arranged with at the two ends of matrix and be used for the top connection and the lower contact that link to each other with logger, also be provided with on the described matrix be used for that heart yearn passes through cross the heart yearn hole.

2, roller erection device as claimed in claim 1 is characterized in that, described roller and roller groove are more than three groups, and circumferentially uniform along described matrix.

3, roller erection device as claimed in claim 2 is characterized in that, described roller along roller shaft to external surface be the garden arc, the arc radius of this garden arc is identical with the radius of internal surface of sleeve pipe.

4, roller erection device as claimed in claim 3 is characterized in that, preferably, roller envelope circular diameter and casing inner diameter that described edge circumferentially distributes match.