阅读说明：本技术 一种老井找漏封隔装置及方法 (Leakage finding packer and method for old well ) 是由 唐永祥 张永峰 郭锐锋 陈江 陈志航 曹宗波 鲁刚 龙明顺 李庆楼 杨浦 谢伟 于 2020-08-05 设计创作，主要内容包括：本发明涉及一种老井找漏封隔装置及方法,是在原有机械套管封隔器的基础上增加为4节密封胶筒,胶筒长度增至35cm,有效提高了封隔器的纵向密封面积,在验漏、堵水、注水泥塞等老井套损井的复杂井中,有效提高了封隔器的纵向密封面积,在老井套损井等复杂井中,能有效提高封隔器的密封面积,提高施工成功率。(The invention relates to a leakage finding and packing device and a method for an old well, which are characterized in that 4 sections of sealing rubber cylinders are added on the basis of the original mechanical casing packer, the length of each rubber cylinder is increased to 35cm, the longitudinal sealing area of the packer is effectively increased in complex wells with old well casing damage such as leakage detection, water plugging and cement injection plugs, the sealing area of the packer can be effectively increased in complex wells such as the old well casing damage well, and the construction success rate is increased.)

1. A well-known leakage-finding packer comprising:

one end of the volume pipe is fixedly provided with a hydraulic anchor, the outer side of the pipe body is coated with an upper mandrel, and a lower mandrel is connected with the other end of the pipe body and is connected with the upper mandrel; a rubber cylinder is arranged in the hydraulic anchor from the outer side to the inner side; the hydraulic anchor slips are fixed on the hydraulic anchor body through the fixed clamping plate, and a spring is arranged between the hydraulic anchor slips and the fixed clamping plate; the top shoe and the bottom shoe are sleeved at two ends of the outer side of the upper mandrel, the top shoe and the hydraulic anchor body are fixedly connected, a plurality of elongated rubber cylinders sleeved at the outer side of the upper mandrel are arranged between the top shoe and the bottom shoe, and a spacer ring is arranged between the elongated rubber cylinders; a slip sliding sleeve is arranged on the outer side of the lower mandrel and is connected with the sole; slips are arranged on the outer side of the slip sliding sleeve, and slip stop pins are arranged between the slip sliding sleeve and the slips for connection; an opening hoop is arranged between the slip and the lower mandrel and is fixed through a screw; a friction block sleeve is sleeved outside the lower mandrel, a friction block is fixedly arranged outside the friction block sleeve, and a friction block elastic sheet is arranged between the friction block sleeve and the friction block; the pressing block is pressed between the friction block and the friction block sleeve to be fixed.

2. The old well leakage detection and isolation device of claim 1, wherein a first O-ring seal is disposed between the volume pipe and the hydraulic anchor body.

3. The old well leakage detection and isolation device of claim 1, wherein a second O-shaped sealing ring is arranged between the hydraulic anchor body and the hydraulic anchor slip.

4. The old well leakage detection and isolation device of claim 1, wherein a third O-ring seal is arranged between the upper mandrel and the hydraulic anchor body.

5. The old well leakage detection and isolation device of claim 1, wherein a fourth O-ring seal is disposed between the upper mandrel and the top shoe.

6. The old well leakage detection and isolation device of claim 1, wherein a fifth O-ring seal is disposed between the upper mandrel and the containment tube.

7. The old well leakage detection and packing device of claim 1, wherein the upper mandrel is in threaded connection with the lower mandrel; the hydraulic anchor body is connected with the top shoe through threads; the sole shoe is connected with the slip sliding sleeve through threads; the upper mandrel is connected with the lower mandrel through threads.

8. A method for leakage detection and packing of a well in the old, which uses the leakage detection and packing device of claim 1 to perform leakage detection and packing of the well in the old, comprising the steps of:

before the well is lowered, the old well leakage finding packer is hung, the friction block sleeve is moved up and down for times, and whether the slip is flexible in movement is checked;

when ready to be run into the well, the slips are in a retracted state; when the test position is reached for preparation operation, the tool is firstly lowered to be slightly lower than the setting position, and then the tool is lifted to the setting position; the pipe column is rotated by a plurality of circles right, and the tool can be rotated by 1/4 circles;

maintaining right-handed torque on the pipe column, and lowering the weight of the pipe column until the slips of the leakage finding packer of the old well start bearing the weight of the pipe column; continuing to lower the pipe column until the old well leakage finding packer bears the expected setting weight, and the tool is in a working state;

and after the test is finished, when the old well leakage detection and isolation device is unsealed, balancing the pressure above and below the old well leakage detection and isolation device, and then lifting the pipe column for unsealing.

Technical Field

The invention relates to the technical field of formation testing, in particular to a leakage finding packer and a leakage finding packer method for an old well.

Background

Along with the progressive deepening of oil and gas field development, reasons such as most old well casing deformation, corruption, scraping is not in place in the well, and short packing element packer is impaired easily and leads to sealedly, and the packing element is as the important component part of packer, and if sealing performance became invalid will directly influence the normal production of oil and gas well, can't reach the design requirement.

Disclosure of Invention

The invention aims to solve the technical problem of providing a leakage finding and sealing device and method for an old well aiming at the defects in the prior art.

The technical scheme adopted by the invention for solving the technical problems is as follows: constructing a leakage detection packer for an old well, comprising:

one end of the volume pipe is fixedly provided with a hydraulic anchor, the outer side of the pipe body is coated with an upper mandrel, and a lower mandrel is connected with the other end of the pipe body and is connected with the upper mandrel; a rubber cylinder is arranged in the hydraulic anchor from the outer side to the inner side; the hydraulic anchor slips are fixed on the hydraulic anchor body through the fixed clamping plate, and a spring is arranged between the hydraulic anchor slips and the fixed clamping plate; the top shoe and the bottom shoe are sleeved at two ends of the outer side of the upper mandrel, the top shoe and the hydraulic anchor body are fixedly connected, a plurality of elongated rubber cylinders sleeved at the outer side of the upper mandrel are arranged between the top shoe and the bottom shoe, and a spacer ring is arranged between the elongated rubber cylinders; a slip sliding sleeve is arranged on the outer side of the lower mandrel and is connected with the sole; slips are arranged on the outer side of the slip sliding sleeve, and slip stop pins are arranged between the slip sliding sleeve and the slips for connection; an opening hoop is arranged between the slip and the lower mandrel and is fixed through a screw; a friction block sleeve is sleeved outside the lower mandrel, a friction block is fixedly arranged outside the friction block sleeve, and a friction block elastic sheet is arranged between the friction block sleeve and the friction block; the pressing block is pressed between the friction block and the friction block sleeve to be fixed.

Wherein, a first O-shaped sealing ring is arranged between the volume pipe and the hydraulic anchor body; a second O-shaped sealing ring is arranged between the hydraulic anchor body and the hydraulic anchor slips; a third O-shaped sealing ring is arranged between the upper mandrel and the hydraulic anchor body; a fourth O-shaped sealing ring is arranged between the upper mandrel and the top shoe; and a fifth O-shaped sealing ring is arranged between the upper core shaft and the volume tube.

The upper mandrel is connected with the lower mandrel through threads; the hydraulic anchor body is connected with the top shoe through threads; the sole shoe is connected with the slip sliding sleeve through threads; the upper mandrel is connected with the lower mandrel through threads.

The technical scheme adopted by the invention for solving the technical problems is as follows: a leakage finding and packing method for an old well is constructed, and comprises the following steps:

before the well is lowered, the old well leakage finding packer is hung, the friction block sleeve is moved up and down for times, and whether the slip is flexible in movement is checked;

when ready to be run into the well, the slips are in a retracted state; when the test position is reached for preparation operation, the tool is firstly lowered to be slightly lower than the setting position, and then the tool is lifted to the setting position; the pipe column is rotated by a plurality of circles right, and the tool can be rotated by 1/4 circles;

maintaining right-handed torque on the pipe column, and lowering the weight of the pipe column until the slips of the leakage finding packer of the old well start bearing the weight of the pipe column; continuing to lower the pipe column until the old well leakage finding packer bears the expected setting weight, and the tool is in a working state;

and after the test is finished, when the old well leakage detection and isolation device is unsealed, balancing the pressure above and below the old well leakage detection and isolation device, and then lifting the pipe column for unsealing.

Different from the prior art, the leakage finding packer for the old well comprises: one end of the volume pipe is fixedly provided with a hydraulic anchor, the outer side of the pipe body is coated with an upper mandrel, and a lower mandrel is connected with the other end of the pipe body and is connected with the upper mandrel; a rubber cylinder is arranged in the hydraulic anchor from the outer side to the inner side; the hydraulic anchor slips are fixed on the hydraulic anchor body through the fixed clamping plate, and a spring is arranged between the hydraulic anchor slips and the fixed clamping plate; the top shoe and the bottom shoe are sleeved at two ends of the outer side of the upper mandrel, the top shoe and the hydraulic anchor body are fixedly connected, a plurality of elongated rubber cylinders sleeved at the outer side of the upper mandrel are arranged between the top shoe and the bottom shoe, and a spacer ring is arranged between the elongated rubber cylinders; a slip sliding sleeve is arranged on the outer side of the lower mandrel and is connected with the sole; slips are arranged on the outer side of the slip sliding sleeve, and slip stop pins are arranged between the slip sliding sleeve and the slips for connection; an opening hoop is arranged between the slip and the lower mandrel and is fixed through a screw; a friction block sleeve is sleeved outside the lower mandrel, a friction block is fixedly arranged outside the friction block sleeve, and a friction block elastic sheet is arranged between the friction block sleeve and the friction block; the pressing block is pressed between the friction block and the friction block sleeve to be fixed. The invention adds 4 sections of sealing rubber cylinders on the basis of the original mechanical casing packer, the length of the rubber cylinder is increased to 35cm, the longitudinal sealing area of the packer is effectively increased in complex wells with old well casing damage such as leakage detection, water plugging and cement injection plug, the sealing area of the packer can be effectively increased in complex wells with old well casing damage, and the construction success rate is increased.

Drawings

The invention will be further described with reference to the accompanying drawings and examples, in which:

fig. 1 is a schematic structural diagram of an old well leakage detection packer provided by the invention.

Detailed Description

For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

Referring to fig. 1, the invention provides a leakage detection packer for an old well, comprising:

the hydraulic anchor device comprises a volume pipe 1, wherein one end of the volume pipe 1 is fixedly provided with a hydraulic anchor 2, the outer side of the pipe body is coated with an upper mandrel 3, and a lower mandrel 4 is connected with the upper mandrel 3 at the other end of the pipe body; a rubber cylinder 5 is arranged in the hydraulic anchor 2 from the outer side to the inner side; the hydraulic anchor slips 6 are fixed on the hydraulic anchor 2 body through the fixed clamping plate 8, and the spring 7 is arranged between the hydraulic anchor slips 6 and the fixed clamping plate 8; the top shoes 9 and the bottom shoes 13 are sleeved at two ends of the outer side of the upper mandrel 3, the top shoes 9 are fixedly connected with the hydraulic anchor 2 body, a plurality of elongated rubber cylinders 10 sleeved at the outer side of the upper mandrel 3 are arranged between the top shoes 9 and the bottom shoes 13, and the spacing rings 12 are arranged between the elongated rubber cylinders 10; a slip sliding sleeve 14 is arranged on the outer side of the lower mandrel 4, and the slip sliding sleeve 14 is connected with the sole 13; slips 16 are arranged on the outer side of the slip sliding sleeve 14, and slip stop pins 15 are arranged between the slip sliding sleeve 14 and the slips 16 for connection; an open hoop 18 is arranged between the slips 16 and the lower mandrel 4, and the open hoop 18 is fixed through a screw 17; a friction block sleeve 22 is sleeved outside the lower mandrel 4, a friction block 19 is fixedly arranged outside the friction block sleeve 22, and a friction block elastic sheet 20 is arranged between the friction block sleeve 22 and the friction block 19; the pressing block 21 is pressed between the friction block 19 and the friction block sleeve 22 for fixing.

Wherein, a first O-shaped sealing ring 23 is arranged between the volume pipe 1 and the hydraulic anchor 2 body; a second O-shaped sealing ring 24 is arranged between the body of the hydraulic anchor 2 and the hydraulic anchor slips 6; a third O-shaped sealing ring 25 is arranged between the upper mandrel 3 and the hydraulic anchor 2 body; a fourth O-shaped sealing ring 26 is arranged between the upper mandrel 3 and the top shoe 9; a fifth O-ring 27 is provided between the upper mandrel 3 and the volume tube 1. A sixth O-ring 28 is disposed between the upper mandrel 3 and the lower mandrel 4.

Wherein, the upper mandrel 3 is connected with the lower mandrel 4 through screw threads; the body of the hydraulic anchor 2 is connected with the top shoe 9 through threads; the sole shoe 13 is connected with the slip sliding sleeve 14 through threads; the upper mandrel 3 is connected with the lower mandrel 4 through threads.

Specifically, the upper mandrel 3 is sleeved on the outer side of the volume tube 1, one end of the upper mandrel 3 is fixedly connected with the hydraulic anchor 2, the other end of the upper mandrel is connected with the lower mandrel 4 through threads, and a first O-shaped sealing ring 23 is arranged between the upper volume tube 1 and the hydraulic anchor 2 for sealing.

The body of the hydraulic anchor 2 is provided with a rubber cylinder 5 from outside to inside, a hydraulic anchor slip 6 is arranged inside the hydraulic anchor 2, and the hydraulic anchor slip 6 is fixed on the hydraulic anchor body 2 through a fixed clamping plate 8. 2 hydraulic anchor slips 6 and fixed clamping plates 8 are arranged, and rubber cylinders 5 are arranged between the two fixed clamping plates 8 and on two sides of the two fixed clamping plates 8; a spring 7 is arranged between the hydraulic anchor slip 6 and the fixed splint 8.

A top shoe 9 and a bottom shoe 13 are arranged at two ends of the upper mandrel 3, the top shoe 9 and the bottom shoe 13 are fixed on the upper mandrel 3 in a threaded connection mode, and a plurality of elongated rubber cylinders are arranged on the top shoe 9 and the bottom shoe 13; as shown in fig. 1, the present invention provides two elongated rubber tubes 10 and 11 between the top shoe 9 and the bottom shoe 13, and in other embodiments of the present invention, other numbers of elongated rubber tubes may be provided as desired. A spacer ring 12 is arranged between the two elongated glue cartridges 10 and 11.

The outer side of the lower mandrel 4 is provided with a slip sliding sleeve 14, the slip sliding sleeve 14 is provided with slips 16, a slip stop pin 15 is arranged between the slip sliding sleeve 14 and the slips 16, the inner side of the slip 16 on the outer side of the lower mandrel 4 is provided with an opening hoop 18, and the opening hoop 18 is spliced through a screw 17. The slip sliding sleeve 14 is embedded in the outer side of the lower mandrel 4. The open hoop 18 embeds the slips 16 and friction block sleeve 22. The friction block 19 is pressed on the friction block elastic sheet 20 for fixing. The pressing block 21 is pressed between the friction block 19 and the friction block sleeve 22 and fixed. The slip sliding sleeve 14 is embedded in the outer side of the lower mandrel 4.

The technical scheme adopted by the invention for solving the technical problems is as follows: a leakage finding and packing method for an old well is constructed, and comprises the following steps:

before the well is lowered, the old well leakage finding packer is hung, the friction block sleeve is moved up and down for times, and whether the slip is flexible in movement is checked;

when ready to be run into the well, the slips are in a retracted state; when the test position is reached for preparation operation, the tool is firstly lowered to be slightly lower than the setting position, and then the tool is lifted to the setting position; the pipe column is rotated by a plurality of circles right, and the tool can be rotated by 1/4 circles;

maintaining right-handed torque on the pipe column, and lowering the weight of the pipe column until the slips of the leakage finding packer of the old well start bearing the weight of the pipe column; continuing to lower the pipe column until the old well leakage finding packer bears the expected setting weight, and the tool is in a working state;

and after the test is finished, when the old well leakage detection and isolation device is unsealed, balancing the pressure above and below the old well leakage detection and isolation device, and then lifting the pipe column for unsealing.

Different from the prior art, the leakage finding packer for the old well comprises: one end of the volume pipe is fixedly provided with a hydraulic anchor, the outer side of the pipe body is coated with an upper mandrel, and a lower mandrel is connected with the other end of the pipe body and is connected with the upper mandrel; a rubber cylinder is arranged in the hydraulic anchor from the outer side to the inner side; the hydraulic anchor slips are fixed on the hydraulic anchor body through the fixed clamping plate, and a spring is arranged between the hydraulic anchor slips and the fixed clamping plate; the top shoe and the bottom shoe are sleeved at two ends of the outer side of the upper mandrel, the top shoe and the hydraulic anchor body are fixedly connected, a plurality of elongated rubber cylinders sleeved at the outer side of the upper mandrel are arranged between the top shoe and the bottom shoe, and a spacer ring is arranged between the elongated rubber cylinders; a slip sliding sleeve is arranged on the outer side of the lower mandrel and is connected with the sole; slips are arranged on the outer side of the slip sliding sleeve, and slip stop pins are arranged between the slip sliding sleeve and the slips for connection; an opening hoop is arranged between the slip and the lower mandrel and is fixed through a screw; a friction block sleeve is sleeved outside the lower mandrel, a friction block is fixedly arranged outside the friction block sleeve, and a friction block elastic sheet is arranged between the friction block sleeve and the friction block; the pressing block is pressed between the friction block and the friction block sleeve to be fixed. The invention adds 4 sections of sealing rubber cylinders on the basis of the original mechanical casing packer, the length of the rubber cylinder is increased to 35cm, the longitudinal sealing area of the packer is effectively increased in complex wells with old well casing damage such as leakage detection, water plugging and cement injection plug, the sealing area of the packer can be effectively increased in complex wells with old well casing damage, and the construction success rate is increased.

While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.