CN201031637Y

CN201031637Y - Rolling wheel ball rigidity casing tube centralizer

Info

Publication number: CN201031637Y
Application number: CNU2007201547393U
Authority: CN
Inventors: 王显诚; 迟庆斌
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-05-16
Filing date: 2007-05-16
Publication date: 2008-03-05
Anticipated expiration: 2017-05-16

Abstract

The utility model relates to a centralizer of roller elastic rigid sleeve, which mainly solves the problems of background techniques and is characterized in that: six elastic rigid centralizing pieces (3) are weaved and spirally connected on a vertical direction between an upper retainer ring (1) and a lower retainer ring (2); the rigid centralizing piece (3) has vertical grooves, an upper and a lower slurry leading pieces (4, 5) are fixed on the upper and lower ends of the grooves and the inside of the grooves are connected with a roller (6). The centralizer of the roller rigid sleeve has advantages of the slurry not easily covering a pump, good centralizing effects, low frictional resistance of a lower sleeve and low costs.

Description

Roller bullet rigid casing centralizer

Technical field:

The utility model relates to the used centralizer of reinforcing oil well field sleeve pipe, especially roller bullet rigid casing centralizer.

Background technology:

On the well cementation setting of casing string, be added with the flexible casing stabbing board of casing stabbing board fundamental type (single arch), spacing spring-backed quill centralizer, eddy flow aluminium alloys rigid casing centralizer and roller rigid casing centralizer during the oil drilling completion.Commonly used have a spacing spring-backed quill centralizer, and its advantage low price is set upright effectively, and the rate of setting upright reaches about 80%; Eddy flow aluminium alloys rigid casing centralizer is set upright effectively, but easily mud drum is suppressed pump, and setting of casing easily is hampered simultaneously; Roller rigid casing centralizer is set upright effectively, and the resistance of centralizer and protective casing, borehole wall mill is little, but cost cost height, processing technology complexity influence the completion cost.

The utility model content:

In order to solve the problem in the background technology, the utility model provides a kind of roller bullet rigid casing centralizer, and this roller bullet rigid casing centralizer has and is difficult for mud drum and suppresses pump, set upright characteristics effective, that setting of casing frictional resistance is little and the cost cost is low.

The technical solution of the utility model is: this roller bullet rigid casing centralizer comprises upper and lower retainer ring, longitudinal knittedly between upper and lower retainer ring be hinged with 6 and play the rigidity righting strips, play on the rigidity righting strip and have longitudinal fluting, the groove upper and lower side is fixed with the upper and lower slice of leading, and is connected with roller in the groove up and down.

Bullet rigidity righting strip in the such scheme also can be welded on the upper and lower retainer ring.

The utlity model has following beneficial effect: this roller bullet rigid casing centralizer has been eliminated mud drum owing to take such scheme by the upper and lower slice of leading; Reduced setting of casing frictional resistance by roller; Because of the cost cost that reduced simple in structure, simplified processing technology.Test data shows that the frictional resistance of this centralizer only is 35.5% and 57.9% of above two kinds of centralizers, and the elastic deformation amount is the 1-2 millimeter, and the rate of setting upright can reach 85-90%; Cost is 1/3rd of a roller rigid casing centralizer; By the scene test of going into the well, effective.The sleeve pipe that is applicable to directional well, extended reach well, horizontal well and straight well is set upright between two parties, reduces the frictional resistance of the sleeve pipe and the borehole wall.So this roller bullet rigid casing centralizer has and is difficult for mud drum and suppresses pump, set upright characteristics effective, that setting of casing frictional resistance is little and the cost cost is low.

Description of drawings:

Accompanying drawing 1 is the utility model structural representation;

1-goes up retainer ring among the figure, retainer ring under the 2-, and 3-bullet rigidity righting strip is led slice on the 4-, lead slice under the 5-, the 6-roller.

The specific embodiment:

The utility model is described in further detail below in conjunction with accompanying drawing:

By shown in Figure 1, this roller bullet rigid casing centralizer comprises upper and lower retainer ring (1,2), upper and lower retainer ring (1,2) longitudinal knittedly between be hinged with 6 and play rigidity righting strips 3, maybe will play rigidity righting strip 3 and be welded on the upper and lower retainer ring (1,2), have longitudinal fluting on the bullet rigidity righting strip 3, play rigidity righting strip 3 for once being pressed into the fluted body spring leaf, the groove two ends are fixed with the upper and lower slice (4,5) of leading, and are connected with roller 6 in the groove up and down.

During actual the use, this centralizer is fixed on the bunch tube, in the process of following well, has eliminated mud drum, avoided suppressing pump by the upper and lower slice (4,5) of leading by upper and lower retainer ring (1,2).Because of roller 7 contacts with the protective casing wall or the borehole wall, reduced playing the contact area of rigidity righting strip 3, and made the bullet rigidity righting strip 3 and the sliding friction of tube wall, the borehole wall become rolling friction, frictional resistance reduces; Playing rigidity righting strip 3 deflections is the 1-2 millimeter, plays the rigidity righting strip 3 monolateral spacings of setting upright and guarantees that in the 31-33 millimeter, the rate of setting upright can reach about 90%; And, also just reduced the cost cost because of simple in structure, simplified processing technology; Test data shows that the frictional resistance of this centralizer only is 35.5% and 57.9% of above two kinds of centralizers, and the elastic deformation amount is the 1-2 millimeter, and the rate of setting upright can reach 85-90%; Cost is 1/3rd of a roller rigid casing centralizer; By the scene test of going into the well, effective.The sleeve pipe that is adapted to directional well, extended reach well, horizontal well and straight well is set upright between two parties, reduces the frictional resistance of the sleeve pipe and the borehole wall.So this roller bullet rigid casing centralizer has the characteristics that mud drum is suppressed pump, set upright the rate height, setting of casing frictional resistance is little and the cost cost is low that are difficult for.

Claims

1. roller bullet rigid casing centralizer, comprise upper and lower retainer ring (1,2), it is characterized in that: upper and lower retainer ring (1,2) longitudinal knittedly between be hinged with 6 and play rigidity righting strips (3), play on the rigidity righting strip (3) and have longitudinal fluting, the groove upper and lower side is fixed with the upper and lower slice (4 of leading, 5), be connected with roller (6) in the groove up and down.

2. roller bullet rigid casing centralizer according to claim 1 is characterized in that: play rigidity righting strip (3) and also can be welded on the upper and lower retainer ring (1,2).