CN213297864U

CN213297864U - Centralizer with additional auxiliary channel

Info

Publication number: CN213297864U
Application number: CN202020948610.5U
Authority: CN
Inventors: 宋波; 李萌; 何清山
Original assignee: Greek Energy Technology Co ltd Chengdu
Current assignee: Greek Energy Technology Co ltd Chengdu
Priority date: 2020-05-29
Filing date: 2020-05-29
Publication date: 2021-05-28
Anticipated expiration: 2030-05-29

Abstract

The utility model discloses an increase centralizer of auxiliary channel belongs to oil and gas and geological exploration drilling engineering's downhole tool field. Comprises a centralizer body; the centralizer body consists of an upper connecting end, a main centralizing rib and a lower connecting end in sequence; the main righting rib consists of three spiral righting ribs with the same size; gaps among the spiral righting ribs form a main slurry channel; an auxiliary slurry channel is arranged on the main righting rib, and an included angle formed between the auxiliary slurry channel and the radial direction of the centralizer body is 30 degrees; the auxiliary slurry channel penetrates through the main righting rib and divides the main righting rib into a plurality of auxiliary righting ribs. The utility model increases the holding capacity of the centralizer for drilling cuttings, enhances the flow of drilling mud and the rotary stirring of the cuttings, and further improves the cleaning effect of the drilling cuttings; the well head can also play a role in trimming the well and improving the well quality.

Description

Centralizer with additional auxiliary channel

Technical Field

The utility model belongs to oil and gas and geological exploration drilling engineering's instrument field in the pit relates to an increase auxiliary channel's centralizer.

Background

Centralizers, also known as stabilizers, are petroleum downhole tools that are attached to a petroleum drill string or are part of a bottom hole assembly. The centralizer is connected to a drill string to play a role in stabilizing the drilling direction, and with practice and understanding for decades, the centralizer is still widely applied, and the main roles of the centralizer include: the well track is controlled, the functions of centralizing and supporting points are realized in the drill string, and the well track and the curvature are controlled together with other components of the drill string; the method comprises the following steps that (1) well hole trimming is carried out, wherein in the process of drilling the drill-following column by using the centralizer, the centralizing ribs of the centralizer can carry out certain reaming on the shrinkage or bending of the well hole, and carry out certain trimming on the irregularity of the well wall, so that the well body quality is improved; the vibration of the drill stem is reduced, the violent vibration of the drill stem and a bottom hole assembly in a borehole in the drilling process is reduced, the service life of the tool is prolonged, and meanwhile, the abrasion of the tool is reduced. At present, with the development of modern drilling technologies such as deep wells, ultra-deep wells, horizontal wells and the like, the function of the centralizer is always indispensable and is an important tool in drilling engineering of petroleum, natural gas and geological exploration.

Centralizers can be divided into two major categories, drill string centralizers and bottom hole assemblies, depending on the location of the drill string. The drill string centralizer is also called an integral centralizer and is connected into a drill string as a component, and is often an undersized centralizer; bottom hole assembly centralizers are part of the bottom hole assembly, such as the centralizers on common screw drills, which are often close to full-bore centralizers. The conventional centralizer is simple in structure, the geometric shapes of the centralizing ribs which play a centralizing role of the centralizer can be divided into spiral shapes, straight bars and the like, a plurality of centralizing ribs can be arranged in quantity, for example, three spiral shapes, five straight bars and the like, and the circular distribution can be uniformly distributed or non-uniformly distributed, for example, eccentric three straight bars and the like. And a channel for the circulation of drilling mud is formed between the strengthening ribs. In order to improve the use effect of the strengthening rib, the working surface of the strengthening rib is usually subjected to wear-resistant treatment in the manners of embedding a hard alloy block, embedding polycrystalline diamond, surfacing a wear-resistant material, brazing the hard alloy block and the like.

The main problem of centralizers in a wide range of applications is on the one hand the working life of the centralizer itself and on the other hand the impact on the drilling engineering. Due to the existence of the righting rib, the blockage is objectively shown in a well hole, the cleaning of drilling cuttings and the smooth passing of a drill string are often influenced, and the difficulty is brought to drilling construction. There is therefore a need to optimise the geometry of existing centralizers, the shape of the slurry channel slots.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: the centralizer provided with the auxiliary channel solves the problems of weak drilling debris containing capacity, poor debris cleaning capacity, weak mud flowing capacity and weak well hole trimming capacity.

The utility model adopts the technical scheme as follows:

a centralizer for increasing an auxiliary channel comprises a centralizer body; the centralizer body consists of an upper connecting end, a main centralizing rib and a lower connecting end in sequence; the main righting rib consists of three spiral righting ribs with the same size; gaps among the spiral righting ribs form a main slurry channel; an auxiliary slurry channel is arranged on the main righting rib, and an included angle formed between the auxiliary slurry channel and the radial direction of the centralizer body is 30 degrees; the auxiliary slurry channel penetrates through the main righting rib to form an auxiliary righting rib.

Further, the auxiliary slurry channel forms an angle of 30 degrees with the radial direction of the body. It is envisaged that the angle may be selected in the range 0-90. Wherein, the auxiliary passage also can be arranged on the main righting rib of the straight-bar-shaped righting device.

Further, the number of the auxiliary mud channels is 6. It is contemplated that this number may be adjusted.

Furthermore, the auxiliary slurry channel is a conical slurry channel with arc transition.

Furthermore, the main righting rib is composed of a plurality of arc-shaped righting ribs.

To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:

1. the utility model provides an increase auxiliary channel's centralizer, is through increasing supplementary mud passageway rightting muscle department, can increase the holding capacity of well drilling detritus, and the detritus is stirred in the rotation of following the drill string, and the clean effect of well drilling detritus is improved to the effect that reinforcing well drilling mud flows.

2. The utility model discloses in, can strengthen the effect of repairing the well, improve the effect of well bore quality through increasing supplementary mud passageway.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and that for those skilled in the art, other relevant drawings can be obtained according to the drawings without inventive effort, wherein:

FIG. 1 is a schematic structural view of a centralizer body;

FIG. 2 is a schematic view of a centralizer for adding an auxiliary channel;

FIG. 3 is a schematic view of the structure of the auxiliary slurry channel of the present invention;

FIG. 4 is a schematic structural view of a circular arc transition tapered slurry channel of the present invention;

fig. 5 is a schematic view of the arc-shaped righting rib structure of the present invention.

The labels in the figure are: 1-centralizer body, 2-upper connecting end, 3-main righting rib, 4-lower connecting end, 5-main slurry channel, 6-auxiliary slurry channel, 7-auxiliary righting rib, 8-arc transition taper slurry channel, and 9-arc righting rib.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention, i.e., the described embodiments are only some, but not all embodiments of the invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.

It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The features and properties of the present invention will be described in further detail with reference to the following examples.

Example one

The utility model discloses preferred embodiment provides an increase centralizer of auxiliary channel, including centralizer body 1, centralizer body 1 is categorised to be rigidity centralizer, and the material is the cast steel, and the size is 31/2in, as shown in figure 1. As shown in fig. 2, the centralizer body 1 is composed of an upper connecting end 2, a main centralizing rib 3 and a lower connecting end 4 in sequence; the main righting rib 3 consists of three spiral righting ribs with the same size; the gaps between the spiral righting ribs form a main slurry channel 5; the main righting rib 3 is provided with the auxiliary slurry channel 6, the included angle between the radial direction of the auxiliary slurry channel 6 and the radial direction of the centralizer body 1 is 60 degrees, the passing of drilling rock debris is improved, the groove depth of the main slurry channel 5 is close to that of the auxiliary slurry channel 6, the auxiliary slurry channel 6 is used for repeatedly repairing the irregular well hole, and the well quality is improved. The side wall of the auxiliary slurry channel 6 and the centralizer body 1 form a certain angle, and the trafficability of the centralizer body 1 in the drilling process is improved. The auxiliary slurry channel 6 penetrates through the main slurry channel 5 to form an auxiliary righting rib 7.

Example two

In the present embodiment, based on the first embodiment, as shown in fig. 3, the number of the auxiliary mud channels 6 is four, so that the rotary flow effect of the drilling mud during the rotation process is increased.

Further, as shown in fig. 4, the auxiliary mud channel 6 is a conical mud channel 8 with arc transition, and the repeated repair of irregular well holes is enhanced and the rotary flow effect of drilling mud is enhanced through the action of the conical mud channel 8 with arc transition in rotation.

Further, as shown in fig. 5, the main righting rib 3 is composed of a plurality of arc-shaped righting ribs 9, so that the application force in the rotating process is strengthened.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the scope of the present invention, and any modifications, equivalents and improvements made by those skilled in the art within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. The utility model provides an increase centralizer of auxiliary passage which characterized in that: comprises a centralizer body (1); the centralizer body (1) is composed of an upper connecting end (2), a main centralizing rib (3) and a lower connecting end (4) in sequence; the main righting rib (3) consists of three spiral righting ribs with the same size; the gaps between the spiral righting ribs form a main slurry channel (5); an auxiliary slurry channel (6) is arranged on the main righting rib (3), and an included angle between the auxiliary slurry channel (6) and the radial direction of the centralizer body (1) is 30 degrees; the auxiliary slurry channel (6) penetrates through the main righting rib (3) to form an auxiliary righting rib (7).

2. A centralizer for adding additional channels according to claim 1, wherein: the auxiliary slurry channel and the radial included angle of the body are 30 degrees.

3. A centralizer for adding additional channels according to claim 1, wherein: the number of the auxiliary slurry channels (6) is six.

4. A centralizer for adding additional channels according to claim 1, wherein: the auxiliary slurry channel (6) is a conical slurry channel (8) with arc transition.

5. A centralizer for adding additional channels according to claim 1, wherein: the main righting rib (3) is composed of a plurality of arc-shaped righting ribs (9).