CN-224228622-U - Integral elastic centralizer

Abstract

The utility model belongs to the field of petroleum equipment, and particularly relates to an integral elastic centralizer. The steel ring is arranged at intervals, elastic righting strips are arranged between the two steel rings and are uniformly distributed between the two steel rings in an annular shape, a wire jacking pipe is arranged on the side wall of the steel ring, through holes communicated with the wire jacking pipe are formed in the steel rings, jackscrews are connected with the inner threads of the wire jacking pipe, and the wire jacking pipe is uniformly distributed on the side wall of the steel ring in an annular shape. According to the utility model, the jackscrew tube is added on the side wall of the steel ring, and the fixing effect of jackscrews is ensured by utilizing the length of the jackscrew tube, so that the integral elastic centralizer has the binding and fixing effects, and the requirement of stability is met under the condition that the stop ring is omitted, and meanwhile, the integral elastic centralizer is simple in structure, ingenious in design and suitable for large-scale popularization and use.

Inventors

• BIN GUOCHENG
• XIE KUNLIANG
• GAO XIANGQIAN
• TIAN YULONG

Assignees

• 山东固特威石油机械有限公司

Dates

Publication Date

20260512

Application Date

20250708

Claims (5)

1. 1. The utility model provides an integral elasticity centralizer, includes the steel ring that two intervals set up and set up the elasticity righting strip between two steel rings, elasticity righting strip is annular evenly distributed between two steel rings, its characterized in that, be provided with the top silk pipe on the lateral wall of steel ring, be provided with on the steel ring with the communicating through-hole of top silk pipe, the internal thread connection of top silk pipe has the jackscrew, the top silk pipe is annular even distribution at the lateral wall of steel ring.
2. 2. The integral elastic centralizer according to claim 1, wherein sawtooth protrusions are arranged on the inner wall of the steel ring and are uniformly distributed on the inner wall of the steel ring in a ring shape.
3. 3. The integral elastic centralizer according to claim 2, wherein a groove is further formed in the inner wall of the steel ring, the groove is in a C-shaped structure, an extension hole matched with the groove is formed in the side wall of the steel ring, a clamp spring is arranged in the groove, and two ends of the clamp spring penetrate out through the extension hole.
4. 4. A unitary resilient centraliser as claimed in claim 3, wherein the recesses are provided on upper and lower sides of the saw tooth projections, the recesses being staggered.
5. 5. The integrated elastic centralizer according to claim 4, wherein the elastic righting strips comprise connecting portions connected with the steel rings and arc-shaped portions arranged between the connecting portions, wherein the connecting portions on two sides of the arc-shaped portions are different in length, and two adjacent elastic righting strips are arranged in a staggered mode.

Description

Integral elastic centralizer Technical Field The utility model belongs to the field of petroleum equipment, and particularly relates to an integral elastic centralizer. Background Centralizers are used to keep casing centered in the wellbore during casing in oil and gas fields to improve the quality of cementing. The centralizer is divided into an elastic centralizer and a rigid centralizer, and the centralizer strip of the elastic centralizer is relatively suitable for oil and gas fields with larger diameter change or larger inclination due to elasticity. The existing elastic centralizer adopts a structure that a plurality of elastic righting strips are inserted between two end cylinders, the two end cylinders are steel rings formed by integral steel rings or spliced hinge plates, and the integral steel rings are more convenient for inserting a sleeve when in use. When the existing centralizer is used, the stop ring is needed to be matched with and limit the centralizer to slide on the inner sleeve, and although the use of the stop ring ensures the stability of the centralizer, the use cost of the centralizer is increased in an intangible way, so that the stability of the centralizer is ensured under the condition that the stop ring is omitted. Disclosure of utility model Aiming at the technical problem that the cost is increased due to the fact that the stop ring is needed to be matched for fixing and stabilizing the existing centralizer, the utility model provides the integral elastic centralizer which is reasonable in design, simple in structure and capable of achieving the stabilization of the centralizer without the aid of the stop ring. In order to achieve the purpose, the utility model adopts the technical scheme that the integral elastic centralizer comprises two steel rings arranged at intervals and elastic centralizing strips arranged between the two steel rings, wherein the elastic centralizing strips are uniformly distributed between the two steel rings in a ring shape, a wire jacking pipe is arranged on the side wall of the steel rings, through holes communicated with the wire jacking pipe are formed in the steel rings, jackscrews are connected with the inner threads of the wire jacking pipe, and the wire jacking pipe is uniformly distributed on the side wall of the steel rings in a ring shape. Preferably, the inner wall of the steel ring is provided with sawtooth bulges which are uniformly distributed on the inner wall of the steel ring in a ring shape. Preferably, the inner wall of the steel ring is further provided with a groove, the groove is in a C-shaped structure, the side wall of the steel ring is provided with an extension hole matched with the groove, the groove is internally provided with a clamp spring, and two ends of the clamp spring penetrate out of the extension hole. Preferably, the grooves are arranged on the upper side and the lower side of the sawtooth protrusions, and the two grooves are arranged in a staggered mode. Preferably, the elastic righting strips comprise connecting parts connected with the steel rings and arc-shaped parts arranged between the connecting parts, wherein the connecting parts at two sides of the arc-shaped parts are different in length, and two adjacent elastic righting strips are arranged in a staggered mode. Compared with the prior art, the utility model has the advantages and positive effects that: 1. The utility model provides an integral elastic centralizer, which ensures the fixing effect of jackscrews by adding jackscrew pipes on the side walls of steel rings and utilizing the lengths of the jackscrew pipes, so that the integral elastic centralizer has the function of binding and fixing, and meets the requirement of stability under the condition of omitting a stop ring. Drawings In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort to a person skilled in the art. FIG. 1 is a schematic view of the structure of the integral resilient centralizer provided in example 1; FIG. 2 is a front view of the integrated resilient centralizer provided in example 1; In the figures, 1, a steel ring, 11, a jackscrew pipe, 12, a groove, 13, an extending hole, 14, a sawtooth protrusion, 2, an elastic righting strip, 21, a connecting part, 22 and an arc-shaped part. Detailed Description In order that the above objects, features and advantages of the utility model will be more clearly understood, a further description of the utility model will be rendered by reference to the appended drawings and examples. It should be noted that, without conflict, the embodiments of the present utility model and features in the