阅读说明：本技术 一种管体可万向弯曲的防砂筛管 (Sand control screen pipe with pipe body capable of being bent universally ) 是由 程焱松 朱云波 石海 司磊 李同磊 于 2020-07-10 设计创作，主要内容包括：本发明公开了一种管体可万向弯曲的防砂筛管,包括依次连接的装配有端部母扣节箍的首部基管、多节中段防砂过滤套管和基管端部带有公扣连接头的末端防砂过滤套管,中段防砂过滤套管和末端防砂过滤套管由基管和套在基管外侧的筛管构成,首部基管的后端和中段防砂过滤套管的后端均带有外球台连接部,中段防砂过滤套管的基管前端和末端防砂过滤套管的基管前端均带有内球台连接部,外球台连接部的前端插入内球台连接部中,在外球台连接部和内球台连接部外侧套有锁母,防止外球台连接部从内球台连接部中脱出,外球台连接部、内球台连接部和锁母构成万向连接头,适用于各种复杂井况水平井及大斜率井弯曲段过渡使用。(The invention discloses a sand control screen pipe with a universally bendable pipe body, which comprises a head base pipe, a plurality of sections of middle section sand control filter sleeves and a tail end sand control filter sleeve, wherein the head base pipe is assembled with a female buckle joint hoop at the end part, the tail end sand control filter sleeves are sequentially connected, the tail end sand control filter sleeves are provided with male buckle connectors at the end part of the base pipe, the middle section sand control filter sleeves and the tail end sand control filter sleeves are composed of the base pipe and the screen pipe sleeved outside the base pipe, the rear end of the head base pipe and the rear end of the middle section sand control filter sleeves are respectively provided with an outer ball table connecting part, the front ends of the base pipe of the middle section sand control filter sleeves and the base pipe of the tail end sand control filter sleeves are respectively provided with an inner ball table connecting part, the front ends of the outer ball table connecting parts are inserted into the inner ball table connecting parts, locking nuts are sleeved outside the outer, the method is suitable for transition use of the bending sections of horizontal wells and large-slope wells with various complex well conditions.)

1. A sand control screen pipe with a universally bendable pipe body is characterized by comprising a head base pipe (1) which is assembled with a female buckle joint hoop at the end part, a plurality of sections of middle section sand control filter sleeves (3) and a tail sand control filter sleeve (4) with a male buckle connector at the end part of the base pipe, which are sequentially connected, wherein the middle section sand control filter sleeves (3) and the tail sand control filter sleeve (4) are both composed of the base pipe and the screen pipe sleeved outside the base pipe, the rear end of the head base pipe (1) and the rear end of the middle section sand control filter sleeve (3) are both provided with an outer ball table connecting part (5), the front end of the base pipe of the middle section sand control filter sleeve (3) and the front end of the base pipe of the tail sand control filter sleeve (4) are both provided with an inner ball table connecting part (6), the front ends of the outer ball table connecting part (5) are inserted into the inner ball table connecting part (6), and locking nuts (, the outer ball table connecting part (5) is prevented from being separated from the inner ball table connecting part (6), the outer ball table connecting part (5), the inner ball table connecting part (6) and the lock nut (7) form a universal connector (2), and adjacent sleeves can be connected at a certain angle.

2. The sand control screen pipe with the universally bendable pipe body as recited in claim 1, wherein the front end of the lock nut (7) is provided with an inner ball table, the inner ball table is sleeved on the outer ball table connecting part (5) to prevent the outer ball table connecting part (5) from being separated from the inner ball table connecting part (6), and the rear end of the lock nut (7) is fixed on the outer wall of the front end of the base pipe of the middle sand control filter casing (3).

3. The sand control screen pipe with the universally bendable pipe body as recited in claim 1, wherein the universal joints (2) can be bent at any angle, the bending angle of a single universal joint is 3-5 degrees, and after a plurality of universal joints are assembled and connected, the sand control screen pipe can be bent by 30-90 degrees.

4. The sand control screen as recited in claim 1 wherein the screen surrounding the base pipe is a wire-wrapped screen, a slotted screen, or a composite screen.

5. The sand control screen pipe with the universally bendable pipe body as recited in claim 4, wherein the screen pipe has a filtration precision of 60-350 um and a precision error of +/-0.05 mm.

Technical Field

The invention relates to a sand control screen pipe, in particular to a sand control screen pipe which is used for oil-sand separation in the oil-gas exploitation process and can be universally bent.

Background

At present, in order to prevent the sand production of oil and gas wells from causing equipment damage and production reduction, screen pipe sand control is mostly adopted in the oil and gas exploitation process of the petroleum industry. Single joint screen lengths are typically 7-12 meters.

The metal sieve tube needs to ensure the deformation resistance, has low bending property and is not suitable for the operation in the bending sections of the horizontal well with medium and small curvature radius and the well with large slope. When the metal screen pipe is forcibly arranged on the bending section of the well condition, the screen pipe can be damaged under the condition that the well wall extrudes the outer wall of the screen pipe for a long time, so that the risk of sand control failure is caused.

Disclosure of Invention

The invention aims to solve the technical problem of providing a sand control screen pipe with a pipe body capable of being bent in a universal mode.

In order to solve the technical problems, the invention adopts the technical scheme that: a sand control screen pipe with a universally bendable pipe body comprises a head base pipe, a plurality of sections of middle section sand control filter sleeves and a tail end sand control filter sleeve, wherein the head base pipe is assembled with a female buckle joint hoop at the end part, the tail end sand control filter sleeves are sequentially connected, the tail end sand control filter sleeves are provided with male buckle connectors, the middle section sand control filter sleeves and the tail end sand control filter sleeves are respectively composed of a base pipe and a screen pipe sleeved outside the base pipe, the rear end of the head base pipe and the rear end of the middle section sand control filter sleeves are respectively provided with an outer ball table connecting part, the front ends of the base pipes of the middle section sand control filter sleeves and the base pipe of the tail end sand control filter sleeves are respectively, the outer side of the outer ball table connecting part and the outer side of the inner ball table connecting part are sleeved with locking nuts, so that the outer ball table connecting part is prevented from being separated from the inner ball table connecting part, and the outer ball table connecting part, the inner ball table connecting part and the locking nuts form a universal connector, so that adjacent sleeves can be connected at a certain angle.

The front end of the lock nut is provided with an inner ball table, the inner ball table is sleeved on the outer ball table connecting part to prevent the outer ball table connecting part from being separated from the inner ball table connecting part, and the rear end of the lock nut is fixed on the outer wall of the front end of the base pipe of the middle-section sand control filter casing pipe.

The universal connectors can be bent at any angle, the bending angle of a single universal connector is 3-5 degrees, and after the universal connectors are assembled and connected, the sand control screen pipe can be bent by 30-90 degrees.

The screen pipe sleeved outside the base pipe is a wire-wound screen pipe, a slotted screen pipe, an impact slotted screen pipe or a composite screen pipe.

The filtering precision of the sieve tube is 60-350 um, and the precision error is +/-0.05 mm.

The invention has the beneficial effects that: the screen pipe sections are connected end to end by adopting a plurality of universal connectors which can be bent independently, so that the screen pipe can be bent at any angle, the bending requirement of the bent section under the complex well condition is met, and the construction difficulty is reduced. The screen pipe is prevented from being damaged by extruding the outer wall of the screen pipe when the well wall is deformed under complex well conditions, and the service life of the screen pipe is prolonged. The invention solves the defects that the common sieve tube is difficult to construct under the well conditions of horizontal wells, inclined wells and the like with medium and small curvature radii and is easy to damage when being used for a long time, is suitable for the sand control of oil and gas wells in bending sections with various complex well conditions, is particularly suitable for the use of the horizontal wells with the medium and small curvature radii, and is an ideal flexible sand control product for the sand control operation of the oil and gas wells.

Drawings

FIG. 1 is a schematic structural view of a sand control screen having a tubular body that is universally bendable according to the present invention;

FIG. 2 is a schematic view of a universal joint of a sand screen having a tubular body universally bendable in accordance with the present invention;

FIG. 3 is a screen section of a sand screen with a tubular body universally bendable according to the present invention.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in figures 1-3, the sand control screen pipe with a universally bendable pipe body of the invention comprises a head base pipe 1 assembled with a female buckle joint hoop at the end part, a plurality of sections of middle section sand control filter sleeves 3 and a tail end sand control filter sleeve 4 with a male buckle connector at the end part of the base pipe, which are connected in sequence, wherein the middle section sand control filter sleeves 3 and the tail end sand control filter sleeves 4 are both composed of the base pipe and the screen pipe sleeved outside the base pipe, the back end of the head base pipe 1 and the back end of the middle section sand control filter sleeves 3 are both provided with outer ball table connecting parts 5, the front ends of the base pipe of the middle section sand control filter sleeves 3 and the base pipe of the tail end sand control filter sleeves 4 are both provided with inner ball table connecting parts 6, the front ends of the outer ball table connecting parts 5 are inserted into the inner ball table connecting parts 6, the locking nuts 7 are sleeved outside the outer ball table connecting parts 5 and, the outer ball table connecting part 5, the inner ball table connecting part 6 and the lock nut 7 form a universal connector 2, so that adjacent sleeves can be connected at a certain angle.

Preferably, the front end of the lock nut 7 is provided with an inner ball table, the inner ball table is sleeved on the outer ball table connecting part 5 to prevent the outer ball table connecting part 5 from being separated from the inner ball table connecting part 6, and the rear end of the lock nut 7 is fixed on the outer wall of the front end of the base pipe of the middle sand control filter casing 3.

The universal connectors 2 can be bent at any angle, the bending angle of a single universal connector is 3-5 degrees, and after the universal connectors are assembled and connected, the sand control screen pipe can be bent by 30-90 degrees.

The screen pipe sleeved outside the base pipe is a wire-wound screen pipe, a slotted screen pipe, an impact slotted screen pipe or a composite screen pipe. The filtering precision of the sieve tube is 60-350 um, and the precision error is +/-0.05 mm.

Briefly, the bendable sand control screen pipe is assembled by a head base pipe 1 assembled with a female buckle joint hoop at the end part, a multi-joint middle section sand control filter casing 3 and a tail end sand control filter casing 4 with a male buckle connector at the end part of the base pipe, wherein the middle section sand control filter casing 3 can be selected to be single or multiple according to the needs of well conditions. The universal connector 2 consists of two semi-inner spherical surfaces and an outer spherical surface and can rotate at any angle by 3-5 degrees. After the universal connectors are assembled and connected, the sand control screen pipe can be bent by 30-90 degrees.

In summary, the disclosure of the present invention is not limited to the above-mentioned embodiments, and persons skilled in the art can easily set forth other embodiments within the technical teaching of the present invention, but such embodiments are included in the scope of the present invention.