阅读说明：本技术 一种管壁内置液压通道控制井下安全阀的油管 (Oil pipe with built-in hydraulic channel on pipe wall for controlling underground safety valve ) 是由 李晨泓 冯新 薛蓥 丁英楠 钟宝库 李凯 陈建廷 刘志刚 于 2021-07-23 设计创作，主要内容包括：本发明提供了一种管壁内置液压通道控制井下安全阀的油管,控制管线总成设计于油管内部,其控制管线接头位于油管上接头开槽处,控制管线穿过油管上接头开槽下部的定位孔,延伸到油管下接头外部；轴向与定位孔对应的下接头内设计有开槽,在上接头上部设计有凸键,轴向对应下接头同样位置设计有定位槽。本申请与井下安全阀配套使用,实现连接,承载,密封,抗扭、内部穿越控制管线于一体,且内部留有施工通道,连接方便,实现了井下安装阀管柱的带压起下作业。(The invention provides an oil pipe with a hydraulic channel built in the pipe wall for controlling an underground safety valve, wherein a control pipeline assembly is designed in the oil pipe, a control pipeline joint of the control pipeline assembly is positioned at a slotting position of an upper joint of the oil pipe, and the control pipeline penetrates through a positioning hole at the lower part of the slotting of the upper joint of the oil pipe and extends to the outside of a lower joint of the oil pipe; the lower joint corresponding to the positioning hole in the axial direction is provided with a slot, the upper part of the upper joint is provided with a convex key, and the lower joint corresponding to the axial direction is provided with a positioning groove at the same position. This application and supporting use of downhole safety valve realize connecting, bear, sealed, antitorque, inside pass through control pipeline in an organic whole, and inside leaves the construction passageway, connect the convenience, have realized the area of installing the valve tubular column in the pit and have pressed and have taken off the operation down.)

1. The oil pipe is characterized in that a control pipeline assembly (2) is arranged inside an oil pipe (1), a control pipeline joint (21) is located at a grooving (112) of an oil pipe upper joint (11), a positioning hole (113) is formed in the lower portion of the grooving (112) of the oil pipe upper joint (11), a control pipeline (22) penetrates through the positioning hole and extends to the outer portion of an oil pipe lower joint (13), a positioning groove (132) is formed in the oil pipe lower joint (13) corresponding to the positioning hole (113) in the axial direction, a convex key (111) is arranged on the upper portion of the oil pipe upper joint (11), and a convex key positioning groove (133) is formed in the same position of the lower joint (13) corresponding to the axial direction.

2. The oil pipe of the downhole safety valve with the built-in hydraulic channel on the pipe wall as claimed in claim 1, wherein the upper joint (11) and the lower joint (13) of the oil pipe are respectively provided with a sealing ring groove I (114) and a sealing ring groove II (131).

3. The oil pipe of the downhole safety valve with the built-in hydraulic channel on the pipe wall as claimed in claim 2, wherein the maximum outer diameter of the upper joint (11) and the minimum inner diameter of the lower joint (13) of the oil pipe are both larger than the outer diameter of the pipe body (12), and the minimum inner diameter of the upper joint and the minimum inner diameter of the lower joint are both smaller than the inner diameter of the pipe body (12).

4. Tubing for a hydraulic passage controlled downhole safety valve according to any of claims 1-3, wherein the control line connection (21) in the tubing is a Shiwecker connection.

5. Tubing for a hydraulic passage-controlled downhole safety valve according to claim 4, further comprising a coupling (4) for connecting two tubing strings.

6. The tubing of claim 4, wherein the coupling has a thread in the middle and enlarged sealing smooth cylinders on both sides for sealing with the sealing ring (3) after connection.

7. The oil pipe of the downhole safety valve with built-in hydraulic channel in the pipe wall as claimed in claim 6, wherein the expanding sealing smooth cylinder comprises an upper expanding sealing surface (41) and a lower expanding sealing surface (42).

8. The tubing for a hydraulic passage controlled downhole safety valve as claimed in claim 7, wherein a construction passage is left inside the tubing.

Technical Field

The invention relates to the technical field of oil field well repair and well control, in particular to an oil pipe with a hydraulic channel arranged in a pipe wall for controlling an underground safety valve.

Background

The underground safety valves are designed and installed on underground pipe columns of offshore platform wells, gas wells, self-blowing wells and gas storage wells, and once a ground wellhead is out of control, the underground safety valves can close a shaft in time and cut off an oil and gas channel to prevent oil and gas from polluting ocean, ground environment and atmosphere. At present, almost all underground safety valve control pipelines are designed outside an oil pipe and are fixed on the outer wall of the oil pipe through a wire clamp, so that when blowout prevention operation equipment is adopted, the pressure in the well is difficult to control to leak through the control pipeline, great difficulty is brought to pressurized workover, and the production efficiency of the pressurized workover is greatly influenced. The well killing operation is not allowed for a large gas well, the gas well is sometimes killed or not killed by adopting high-density well killing fluid, and the productivity of the gas well is greatly influenced, so that a special oil pipe which is convenient to connect and can be lifted up and down by adopting operation under pressure is urgently needed to be developed and designed.

The invention patent with the publication number of CN104295243B discloses an oil and gas well completion pipe string and a well completion process, which belong to the technical field of oil extraction engineering well completion pipe strings and comprise an inner oil pipe, a safety valve and a hydraulic control pipeline, wherein the upper part of the safety valve is connected with a buckle change connector through threads, the buckle change connector is provided with a step-shaped inner shoulder and connecting threads which are respectively connected with the inner oil pipe and an outer pipe, and the inner shoulder of the buckle change connector is provided with a through hole; the hydraulic control pipeline is positioned in an annular space between the inner oil pipe and the outer pipe, passes through the through hole on the inner shoulder of the buckle joint and is sealed by the sealing element. The inner oil pipe and the hydraulic control pipeline are fixed through a clamping ring. The invention realizes the well completion pipe string with the downhole safety valve in the snubbing operation, reduces the pollution of an oil-gas layer in the well completion process, and effectively protects a reservoir stratum, but the hydraulic control pipeline is positioned outside the inner oil pipe, and when blowout prevention operation equipment is adopted no matter the pipe string is put in or pulled out in the snubbing process, the leakage of the pressure in the well through the control pipeline part is difficult to control. Therefore, it is urgently needed to develop and design a special oil pipe which is convenient to connect and can be lifted and lowered by adopting pressurized operation.

Disclosure of Invention

In order to solve the technical problem, the invention provides an oil pipe with a hydraulic channel built in the pipe wall for controlling an underground safety valve. The oil pipe is characterized in that a pressure control pipeline is designed inside the oil pipe, and one section of the hydraulic pipeline is connected while the oil pipe is connected. The construction can be normally carried out by adopting the operation equipment with pressure.

The invention provides an oil pipe with a hydraulic channel built in the pipe wall for controlling a downhole safety valve, wherein a control pipeline assembly is arranged in the oil pipe, a control pipeline joint is positioned at the slotting position of an upper joint of the oil pipe, a positioning hole is arranged at the lower part of the slotting position of the upper joint of the oil pipe, a control pipeline penetrates through the positioning hole and extends to the outside of the lower joint of the oil pipe, a positioning groove is arranged in the lower joint axially corresponding to the positioning hole, a convex key is arranged at the upper part of the upper joint of the oil pipe to prevent the two connected oil pipes from rotating relatively to play a role in positioning and prevent the connecting joint and a hydraulic control pipeline from being broken under the action of high torque, and a convex key positioning groove is arranged at the same position axially corresponding to the lower joint.

Preferably, the upper joint and the lower joint of the oil pipe are respectively provided with a sealing ring groove.

In any of the above schemes, preferably, the maximum outer diameters of the upper joint and the lower joint of the oil pipe of the safety valve under the control of the hydraulic channel arranged in the pipe wall are both larger than the outer diameter of the pipe body, and the minimum inner diameters of the upper joint and the lower joint are both smaller than the inner diameter of the pipe body.

In any of the above embodiments, the control line joint is a swagelok joint.

The oil pipe of the underground safety valve controlled by the hydraulic channel arranged in the pipe wall is connected through the coupling, the connection mode is good in tensile capacity, and connection and sealing are achieved.

In any of the above schemes, preferably, the inner middle part of the coupling is provided with a screw thread, and the two sides are provided with expanding sealing smooth cylinders for forming sealing with the sealing ring after connection.

In any of the above embodiments, the sealing optical tube preferably includes an upper expanding sealing surface and a lower expanding sealing surface.

By adopting the technical scheme, the invention has the following beneficial effects:

the construction is carried out by adopting the pressurized operation equipment, and the oil pipe with the underground safety valve control pipeline can be lifted as a normal oil pipe; the hydraulic control pipeline of the underground safety valve is designed in the oil pipe, so that the normal oil pipe production and measure passage is not influenced; the oil pipes are connected in a sealing mode and can bear larger torque, the oil pipes of the underground safety valve controlled by the hydraulic channel arranged in the pipe wall guide the hydraulic control pipeline from the inside to the outside through the sealing connection joints to be matched with the safety valve for use, connection, bearing, sealing, torsion resistance and internal crossing of the control pipeline are achieved, the construction channel is reserved inside the oil pipes, connection is convenient, and the operation of installing the valve pipe column in the underground under pressure is achieved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a cross-sectional view of the tubing structure of a downhole safety valve controlled by a hydraulic channel built in the tubing wall according to a preferred embodiment of the present invention;

FIG. 2 is a cross-sectional view of the connection between the oil pipes according to the preferred embodiment of the present invention shown in FIG. 1.

Reference numerals:

1-an oil pipe; 11-oil pipe upper joint; 111-convex key; 112-slotting; 113-a positioning hole; 114-seal ring groove 1; 12-a tube body; 13-oil pipe lower joint; 131-seal ring groove 2; 132-a positioning groove; 133-raised key positioning slots; 2-control line assembly; 21-control line connection; 22-control lines; 3-sealing ring; 4-a coupling; 41-expanding the sealing surface upwards; 42-lower expanding seal surface.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" 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," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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.

The present invention will be further explained with reference to specific embodiments.

An oil pipe with a hydraulic channel built in a pipe wall for controlling a downhole safety valve is shown in fig. 1, a control pipeline assembly 2 is designed inside the oil pipe 1, a control pipeline joint 21 is positioned at a slot 112 of an upper joint 11 of the oil pipe 1, a positioning hole 113 is designed at the lower part of the slot 112 of the upper joint 11 of the oil pipe 1, a control pipeline 22 passes through the positioning hole and extends to the outside of a lower joint 13 of the oil pipe, a positioning groove 132 is designed in the lower joint 13 of the oil pipe axially corresponding to the positioning hole 113, a convex key 111 is designed at the upper part of the upper joint 11 of the oil pipe, and a convex key positioning groove 133 is designed at the same position of the lower joint 13 axially corresponding to the convex key positioning groove 133.

Furthermore, a seal ring groove I114 and a seal ring groove II 131 are respectively designed on the oil pipe upper joint 11 and the oil pipe lower joint 13.

The maximum outer diameter of the oil pipe upper joint 11 and the maximum outer diameter of the oil pipe lower joint 13 are larger than the outer diameter of the pipe body 12, and the minimum inner diameters of the oil pipe upper joint and the oil pipe lower joint are smaller than the inner diameter of the pipe body 12.

The control line joint 21 in the tubing is a swagelok joint.

The oil pipe also comprises a coupling 4 used for connecting two oil pipes, the middle part in the coupling is provided with a screw thread, and the two sides of the coupling are provided with expanding sealing smooth cylinders which are used for forming sealing with the sealing ring 3 after connection.

The expanding sealing optical cylinder comprises an upper expanding sealing surface 41 and a lower expanding sealing surface 42.

FIG. 2 is a cross-sectional view of the connection between the oil pipes of the preferred embodiment shown in FIG. 1. When the oil pipes are connected, one section of the hydraulic pipeline is connected, the convex key 111 on the upper part of the oil pipe upper joint 11 is connected with the convex key positioning groove 133 of the lower joint 13 after connection, the two connected oil pipes are prevented from rotating relatively, the positioning function is realized, the connection joints and the hydraulic control pipeline are prevented from being broken under the action of large torque,

the oil pipe is matched with an underground safety valve for use, and the fact that the oil pipe is normally lifted and lowered under pressure operation is achieved.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.