CN215213364U - Woven high-strength rigid centralizer - Google Patents

Abstract

The utility model discloses a high muscle rigidity centralizer of woven expression, the muscle of rightting of the high muscle rigidity centralizer of woven expression becomes bow type, it is equipped with the muscle internal stay to right in the muscle, it is equipped with the end hoop to right the muscle both ends, through hinged joint between the end hoop, insert the cylindric lock in hinge department and embrace two half woven expression high muscle rigidity centralizer in the sleeve pipe and assemble into one set of woven expression high muscle rigidity centralizer, the retaining ring that tightly fixes is located centralizer both ends, in order to prevent the removal of the high muscle rigidity centralizer of woven expression, realize the centralizer with the moving casing and go into the well. The utility model discloses have brand-new outward appearance structure, convenient use, cost of transportation are low. The device is applied to the field with larger clearance between the casing and the well wall, and has more convenient and safer use and better benefit.

Description

Woven high-strength rigid centralizer

Technical Field

The utility model relates to a rigidity centralizer.

Background

Centralizers are known to those skilled in the art for use in the oil, gas, and drilling industries to secure casing between the walls of a borehole or the center of another larger tubular member previously installed. For a rigid centralizer, the basic requirements are: 1) zero lowering force; 2) is not easy to deform.

When the casing is placed in the borehole wall or in a previously installed further larger tubular member, it is required that the centralizer must hold the casing substantially centrally in the borehole wall or in the previously installed further larger tubular member, so as to form a substantially uniform annular channel between the borehole wall and the casing. This allows material, such as liquid, cement slurry, etc., to flow evenly around the casing. In some cases, it is necessary to fix the sleeve in the center.

The woven low-rib rigid centralizer is a hinged and linked rigid centralizer. It has the characteristics of zero downward force and difficult deformation. The woven low-rib rigid centralizer is formed by using a pickled plate as a raw material, respectively forming an end hoop and a centralizing rib after laser cutting, weaving the end hoop and the centralizing rib together, and then connecting the end hoop and the centralizing rib through a cylindrical pin hinge. The structure is shown in fig. 1 and 2.

The working state of the centralizer is as follows:

1) the downhole situation is shown in fig. 3, and it is necessary to install a stop ring 2 at each end of the centralizer 3, to fix the stop ring 2 to limit the movement of the woven low-rib rigid centralizer, and to move the casing to make the stop ring 2 enter the well wall 4 or another larger tubular member installed before with the woven low-rib rigid centralizer 3.

2) The operating conditions in the well are shown in figure 4. As the depth of the well extends, the path of the well may become inclined or straight. When the casing 1 runs in a well, the woven low-rib rigid centralizer 3 can bear the self-gravity of the casing, and at the moment, the centralizing blades 10 of the centralizing ribs 7 cling to the well wall 4, so that uneven annular gaps 5 are formed between the casing 1 and the well wall 4. To ensure sufficient annular clearance, the centralizing ribs 7 must possess high strength to ensure a minimum clearance between the casing 1 and the borehole wall or another larger tubular member previously installed, to ensure the flow of liquid or mortar within the annular gap 5.

When the annular gap 5 formed between the casing 1 and the well wall 4 is large, the required righting rib is high, the righting blades 10 on the righting rib 7 are easy to deform or break under the self-gravity of the casing, so that the annular gap 5 is uneven, the casing is clamped in an oil well or a natural gas well by the broken righting rib, a large drilling and production accident is caused, and the whole force is prevented, so that the optimization is performed.

Disclosure of Invention

The utility model aims at providing a high muscle rigidity centralizer of formula of weaving. The novel energy-saving device has the characteristics of brand-new structure, zero-discharge capacity and high strength, and is more convenient and safer to use and better in benefit.

The technical scheme of the utility model is that: the utility model provides a woven high muscle rigidity centralizer, including the sleeve pipe, the check ring, woven high muscle rigidity centralizer, characterized by woven high muscle rigidity centralizer's righting muscle becomes the bow type, it is equipped with muscle internal stay in the muscle to right the muscle, it is equipped with the end hoop to right muscle both ends, pass through hinged joint between the end hoop, insert the cylindric lock at hinge department and embrace two half woven high muscle rigidity centralizer in the sleeve pipe and assemble one set of woven high muscle rigidity centralizer, tightly fixed check ring is located centralizer both ends, in order to prevent woven high muscle rigidity centralizer to remove, realize the centralizer with the motion sleeve pipe and go into the well.

Further, the maximum outer diameter of the centralizing rib is smaller than the outer diameter of the borehole wall or another larger tubular member previously installed, and the minimum inner diameter is larger than the outer diameter of the casing.

The utility model discloses to righting the muscle modification on the basis of low muscle rigidity centralizer of woven expression, the muscle intensity is right in the mode enhancement that adopts the internal stay, effectively prevents to right the muscle limit shape. The utility model discloses have brand-new outward appearance structure, convenient use, cost of transportation are low. The device is applied to the field with larger clearance between the casing and the well wall, and has more convenient and safer use and better benefit.

The utility model discloses a according to the low muscle rigidity centralizer of woven expression, the high muscle centralizer of woven expression that optimal design goes out more is fit for being used for the great scene in clearance between sleeve pipe and the wall of a well in the aspect of the application. The strengthening high rib optimized by taking the strengthening low rib as the template has higher strength, is safer and has better benefit.

Drawings

FIG. 1 is a schematic front view of a woven low-rib rigid centralizer.

Fig. 2 is a top view of fig. 1.

FIG. 3 is a downhole condition of the woven low rib rigid centralizer.

Figure 4 is a run in the well of the woven low rib rigid centralizer.

Fig. 5 is a structural schematic diagram of the woven high-rib rigid centralizer.

Fig. 6 is a top view of fig. 5.

FIG. 7 shows the downhole position of the woven high-rib rigid centralizer.

Figure 8 shows the operation of the woven high-rib rigid centralizer in the well.

The reference numbers illustrate:

the well casing comprises a casing pipe 1, a stop ring 2, a centralizer 3, a well wall 4, a gap 5, a cylindrical pin 6, a centralizing rib 7, a hinge 8, an end hoop 9, a centralizing blade 10 and a rib inner support 11.

Detailed Description

The structure diagram of the present invention is shown in fig. 5 and fig. 6, and the specific working method is the same as the above, and the structure improvement and improvement will be described with reference to fig. 5 and fig. 6 in the specification.

As shown in fig. 5, a semi-woven high-strength rigid centralizer is firstly embraced in a casing 1, and then another semi-woven high-strength rigid centralizer is inserted into a cylindrical pin 6 through a hinge 8 to be connected with the casing, so as to assemble a set of woven high-strength rigid centralizer 3. The righting rib 7 is in a bow shape, the rib inner support 11 is welded with the righting rib, the two ends of the righting rib 7 are provided with end hoops 9 which are connected through a hinge 8, the maximum outer diameter of the righting rib 7 is smaller than the outer diameter of the well wall 4 or another larger tubular component which is installed before, and the minimum inner diameter is smaller than the inner diameter of the casing 1.

Tightly fixed stop rings 2 are located at both ends of the centralizer to prevent the woven high-rib rigid centralizer from moving to move the casing 1 to effect centralizer lowering.

As shown in fig. 7 and 8, when the woven high-rib rigid centralizer 3 runs in a horizontal well, the rigid centralizing rib 7 is tightly attached to the well wall 4 under the action of the self gravity of the casing, so that an uneven annular gap 5 is formed between the casing 1 and the well wall 4. However, under the action of the rib inner support 11, the strengthening rib has large strengthening force and high strength, so that the strengthening rib can be prevented from deforming or breaking due to the self-gravity of the casing, and the minimum gap between the casing 1 and the well wall is ensured, thereby ensuring the flow of liquid or mortar in the annular gap 5.

The utility model discloses a do the righting muscle structure of low muscle centralizer of woven expression with strengthening, optimize out one kind and use wider, safer high muscle rigidity centralizer of woven expression.

The aforesaid, only be the utility model discloses a concrete embodiment, it is not right the utility model discloses do any restriction, all according to the utility model discloses the technical entity all still belongs to any simple modification, change and the equivalent structure change of doing above embodiment the utility model discloses in technical scheme's the protection scope.

Claims (2)

1. The utility model provides a woven high muscle rigidity centralizer, including sleeve pipe (1), check ring (2), woven high muscle rigidity centralizer (3), the bow-type is become in righting muscle (7) of characterized by woven high muscle rigidity centralizer (3), be equipped with muscle internal stay (11) in righting muscle (7), it is equipped with end hoop (9) to right muscle (7) both ends, connect through hinge (8) between the end hoop, insert cylindric lock (6) in hinge (8) department and embrace two half woven high muscle rigidity centralizer and assemble into one set of woven high muscle rigidity centralizer (3) in sleeve pipe (1), tightly fixed check ring (2) are located the centralizer both ends, in order to prevent woven high muscle rigidity centralizer (3) to remove, in order to move sleeve pipe (1) realization centralizer well.

2. A woven high-rib rigid centralizer as claimed in claim 1, wherein the centralizer ribs (7) are welded to the rib inner support (11) to a maximum outer diameter less than the outer diameter of the borehole wall (4) or another tubular member previously installed and to a minimum inner diameter greater than the outer diameter of the casing (1).

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