阅读说明：本技术 具有滚子的保护性定中心装置 (Protective centering device with rollers ) 是由 铁木尔·瑞斯塔莫维奇·奥科秋林 于 2020-10-28 设计创作，主要内容包括：申请涉及石油工程领域,并且在定向的、偏斜的、水平的和复合断面井中在生产碳氢化合物期间能够使用。一种具有电缆通道的具有滚子的保护性定中心装置特征在于,包括：壳体,在其里面电缆通道沿着该壳体的整个长度纵向延伸；由以镜状对称安装并且相互连接的至少两个部件构成的夹紧的定心架,该两个部件在一侧上铰接于该壳体,并且在另一侧上通过可拆卸的紧固接头相互连接,以形成用于容纳井筒管的内腔,其中壳体和夹紧的定心架具有形成在外表面上的肋,该肋装有沿着肋的中心成对地设置并且均匀地环绕该保护性定中心装置的滚子,并且其中纵向旁通通道形成在肋之间的壳体和夹紧的定心架的外表面上。(The application relates to the field of oil engineering and can be used during the production of hydrocarbons in directional, deviated, horizontal and compound profile wells. A protective centering device with rollers having a cable channel, comprising: a housing within which a cable channel extends longitudinally along the entire length of the housing; a clamped centralizer made of at least two parts mounted symmetrically in mirror shape and connected to each other, the two parts being hinged to the housing on one side and connected to each other on the other side by means of a detachable fastening joint to form an inner cavity for accommodating the wellbore tubular, wherein the housing and the clamped centralizer have ribs formed on the outer surface, which ribs are provided with rollers arranged in pairs along the center of the ribs and evenly surrounding the protective centralizer, and wherein longitudinal bypass channels are formed on the outer surface of the housing and the clamped centralizer between the ribs.)

1. A protective roller centering device having a cable channel, comprising:

-a housing within which a cable channel extends longitudinally along the entire length of the housing;

a clamping yoke centering rack consisting of two parts which are mounted in a mirror-like manner and abut each other, which parts are pivotally connected to the housing on one side and are connected to each other on the other side by means of a detachable fastening connection to form an inner cavity for accommodating a wellbore pipe,

wherein the housing and the clamping yoke have ribs on the outer surface, said ribs carrying the rollers arranged in pairs and evenly surrounding the protective roller centering means,

wherein longitudinal bypass channels are formed on the outer surfaces of the housing and the clamping yoke centering bar between the ribs.

2. The protective roller centralizer with cable channel of claim 1, wherein the protective roller centralizer is made of steel or cast iron.

Technical Field

The present invention relates to the field of oil engineering, and in particular to a protective roller centralizer/roller protector for wireline lines, and roller protector usable during hydrocarbon production in deviated, curved, horizontal and compound profile wells.

Background

The main type of production well is now represented by a vertically-horizontally branched composite profile wellbore having horizontal and composite profile sections within an oil and gas reservoir. Such wells are constructed to achieve maximum oil recovery and production efficiency. And the most important current trends include the recovery of idle or inefficient wells by drilling additional deviated and horizontal sections. This method for extracting hydrocarbons enables one to significantly increase the production efficiency and the oil recovery factor of the reservoir. At the same time, the proper application of the method can obviously improve the quality of geological exploration and reduce the related cost, and the multiple hydrocarbon production can be increased by a drilling method. The most complicated technical problems are difficult to solve when performing such a method without using special equipment.

One of the major problems includes transporting the filler pipe and submersible pump to and from the horizontal well section.

When running back and forth in horizontal well sections having a long length (e.g., greater than 1000 meters), a 8 to 10 meter long wellbore tubular will sink under its own weight. In this case, the contact area between the wellbore pipe and the casing string is increased. The friction between the wellbore pipe and the casing string becomes so great that they cannot be run further-the weight of the vertical pipe is not sufficient to move further. So-called "unloading" of the filler pipe occurs. All this significantly complicates the back and forth stroke operations in wells with horizontal sections. Because of the uprightness of the well during well operations, this complication can lead to pipe sticking as the filler pipe adheres to the wall of the production string, making it difficult or even impossible to sequentially pull the filler pipe out to the surface with the downhole equipment.

This environment also often causes damage to the wireline-when the wireline is between the wellbore tubular and the casing string of the well, the wireline is tripped out and damaged. Furthermore, the wear of the filler pipe increases and causes damage thereof due to the eccentric position of the wellbore pipe in the oil well.

Solutions similar to the present invention are known in the prior art.

For example, RU124302 discloses a centraliser device for securing a cable to the body of a wellbore tubular. The centering device comprises a housing with a cable passage and an outer casing such that the housing is designed as at least one clamping yoke which, when connected to the housing, forms an inner cavity for accommodating a wellbore pipe.

A disadvantage of this device known from RU124302 is that it is not sufficient to reduce friction and eccentricity of the filling pipe in the horizontal well section.

EP 1246996B 1 discloses a device for reducing friction during a round trip operation in an oil well. The device comprises a housing (which comprises half parts) with at least one clamping yoke centering bracket. The clamping yoke is pivotally connected to the housing on one side and on the other side by means of a detachable fastening connection. The housing and the clamping yoke centring bracket are provided with rollers. The device has one or more channels for passage of fluid.

Various devices for positioning drill pipes, casings and wellbore tubulars in an oil well and reducing longitudinal friction in the oil well are known from WO2012138813, EP0778914, EP1029146, EP 0824629.

A drawback of these known devices is that they are not sufficient to reduce the eccentric position of the filler pipe, thus increasing the wear of the latter and causing damage thereto.

Disclosure of Invention

Technical effects achieved when implementing the present invention include reduced eccentric location of the filler pipe and increased operating device performance due to the absence of tubing displacement, thereby reducing wellbore pipe and wireline damage during the round trip operation.

The above-mentioned technical effect is achieved by the proposed protective roller centering device with cable passage. The protective roller centralizer includes a housing within which a cable passage extends longitudinally along the entire length of the housing; a clamping yoke centering frame consisting of at least two parts which are mounted in a mirror-like manner and abut each other. The at least two parts are pivotally connected to the housing on one side and arranged to be connected to each other by means of a detachable fastening connection on the other side to form an inner cavity for accommodating the wellbore tubular. The housing and the clamping yoke have ribs formed on the outer surface. The ribs are fitted with rollers arranged in pairs along the center of the rib and evenly around the circumference of the protective roller centralizer. Longitudinal bypass channels are formed on the outer surfaces of the housing and the clamping yoke centering yoke between the ribs.

Also, the protective roller centering device with cable channels can be made of steel or cast iron, which increases the operational performance of the device.

By providing a housing and a clamping yoke centering block with ribs on the outer surface, the ribs carrying rollers arranged in pairs at their centers and evenly around the circumference of the protective roller centering block, and by forming longitudinal bypass channels between the ribs on the outer surface of the housing and the clamping yoke centering block, it is possible to reduce the eccentric position of the filler pipe, which in turn reduces filler pipe wear and damage, and improves the operability of the protective roller centering block.

The cable passage extends longitudinally within the housing along the entire length of the housing, which allows the cable to be positioned within the protective roller centralizer without displacement of the filler pipe relative to the centerline of the protective roller centralizer, which in turn reduces eccentricity of the device and increases the operational performance of the device.

The cabling is housed in the housing and extends straight along the entire length of the housing, which simplifies the arrangement of the cabling in the device, prevents bending of the cabling during installation and operation of the device, provides secure fastening, and increases the reliability of securing the cabling with the wellbore tubular and the operational performance of the device.

The rollers are arranged in pairs in the center of the rib and evenly around the circumference of the protective roller centralizer improving the centering of the injection tubing in the well and increasing the operability of the device.

In one aspect, the rollers are arranged in pairs in the center of the rib and evenly around the circumference of the protective roller centralizer increase the reliability, flexibility and centering of the wellbore tubular and downhole equipment in deviated, curved, horizontal and compound profile wells with the result of increased damage protection during back and forth travel operations, thus increasing the operational performance of the device.

The provision of longitudinal bypass channels between the ribs uniformly surrounding the circumference of the protective roller centering device also improves the centering of the injection tubing in the well, acts to reduce the eccentric location of the injection tubing, increases the operability of the device, and reduces damage to the wellbore tubular and wireline due to the lack of displacement during the round trip operation.

The clamping yoke centering bracket is composed of at least two parts which are mounted in a mirror-like manner and abut against each other. Due to the formation of at least one (two, three, four or more) clamping yoke centering racks, the reliability of fixing the wireline and the wellbore tubular is increased and their protection against damage is improved.

Drawings

The gist of the invention is illustrated by the accompanying drawings, in which:

FIG. 1 shows a general view of a protective roller centralizer with cable access during stroking operations in an oil well when the parts of the clamp yoke are closed;

FIG. 2 shows a general view of a protective roller centralizer with cable access during stroking operations in an oil well when the parts clamping the yoke spider are open;

FIG. 3 shows a general view of a protective roller centralizer with cable channels during stroking operations in an oil well when the protective roller centralizer is installed on a tubular with a cable run that can be used subsea;

fig. 4 shows an overview of a protective roller centralizer with cable channels during stroking operations in an oil well (cross-sectional view of the pipe and cable run) when the protective roller centralizer is installed on the pipe with a cable run that can be used underwater.

Detailed Description

During the back and forth operation in an oil well (see fig. 1-4) of a protective roller centering device with cable passage is a housing 1 comprising at least one clamping yoke 2, which yoke 2, when attached to the housing, forms an inner cavity 9 for accommodating a well casing tube 7 and a cable passage 10 for accommodating a cable line 8. The clamping yoke 2 is composed of at least two parts which are mounted in a mirror-like manner and adjoin one another. The at least two components are connected to the housing 1 on one side by means of a ball pivot joint 4 and are configured to be connected to one another on the other side by means of a detachable fastening connection 3. The housing 1 and the yoke 2 have a plurality of ribs (not shown in the drawings) formed on the outer surface. The rib is fitted at its centre with rollers 5 arranged in pairs and evenly around the circumference of the protective roller centralizer. Longitudinal bypass channels 11 are formed on the outer surface of the clamping yoke 2 of the housing 1 and between the ribs. The roller 5 is mounted on a shaft 6.

During back and forth operations in an oil well, a protective roller centralizer having a cable passage is mounted on a wellbore tubular as follows.

The parts of the clamping yoke 2 are separated from each other by unscrewing the detachable connections 3. In this case, the parts of the yoke 2 pivotally connected to the housing 1 are not removed (see fig. 2). The housing 1 is mounted on a wellbore pipe 7, i.e. the wellbore pipe 7 is arranged in an inner chamber 9, while the parts of the yoke 2 are fixed to each other by means of detachable connections 3 which are bolted. The wireline 8 is pressed onto the wellbore tubular 7 by using the wireline channel 10 (see fig. 3).

During a round trip operation in the well, the central axis of the wellbore tubular 7 coincides with the central axis of the outer diameter of the installed protective roller centralizer with cable passage. In this case, the rollers 5 project with respect to the housing 1 and (parts of) the clamping yoke 2, thus reducing the eccentricity and the friction coefficient of the filler pipe. A bypass channel 11 for the passage of fluid is provided between the rollers 5 (see fig. 4).

A protective roller centralizer having cable passages in the well is tightened when the removable bolted connection is installed so that the wellbore tubular and wireline remain inside the device.

Thus, a protective roller centralizer with cable channels and wireline is installed on the main body of the wellbore tubular in the well.

The proposed design of a protective roller centralizer with cable passage in an oil well is reusable.