CN215927318U

CN215927318U - Pressure measuring packer

Info

Publication number: CN215927318U
Application number: CN202122368649.7U
Authority: CN
Inventors: 石继民; 李见; 修亮; 朱革; 田金玉; 刘久龙; 刘大勇; 张国辉
Original assignee: Zhongyou Zhike Jilin Technology Equipment Co ltd
Current assignee: Zhongyou Zhike Jilin Technology Equipment Co ltd
Priority date: 2021-09-29
Filing date: 2021-09-29
Publication date: 2022-03-01
Anticipated expiration: 2031-09-29

Abstract

The utility model relates to a pressure measuring packer which comprises an upper joint, a central pipe, an outer central pipe, a rubber cylinder, a spacer ring, a lower compression ring, a lock spring seat, a lock spring, a setting piston, a fixed piston, a piston sleeve, a lower piston and a lower joint. The upper joint is connected with the central pipe by screw thread, the upper joint is connected with the outer core pipe by screw thread, the rubber cylinder, the spacer ring and the lower press ring are sleeved outside the outer core pipe, the lock spring is sleeved in the outer groove of the lock spring seat, the lock spring seat is sleeved at the lower part of the outer core pipe, the outer core pipe and the lock spring seat are fixed by a deblocking pin, the setting piston and the fixed piston are sleeved outside the central pipe, the lower piston is sleeved outside the fixed piston, the piston sleeve is connected with the lower joint by screw thread, and the central pipe is connected with the lower joint by screw thread. When the high-pressure-resistant rubber cylinder is used, the stratum pressure drives well fluid to enter the boosting cavity through the fluid inlet hole, the higher the stratum pressure is, the larger the pushing force is, the better the sealing expansion effect of the rubber cylinder is, the higher the pressure resistance is, and the requirement on high-pressure resistance is met.

Description

Pressure measuring packer

The technical field is as follows: the utility model relates to a packer for an oil field, in particular to a pressure measuring packer.

Background art: at present, the packer for layered pressure measurement in oil fields basically has the same working principle, and the pressure measurement is carried out in the middle of two sections of packers after expansion sealing by pushing a piston and compressing a rubber sleeve by pressurizing an oil pipe to complete expansion sealing. Because the formation pressure is low, the working pressure requirement of the pressure measuring packer is not high, and the pressure measuring work can be basically finished. However, when a well with high formation pressure is encountered, the common packer has low pressure resistance, and the packer fails due to high pressure, so that a high-pressure-resistant pressure measuring packer is needed to solve the problem.

The utility model content is as follows: the purpose of the utility model is: the pressure measuring packer with high pressure resistance is provided for an oil field, the pressure measuring packer is provided with a boosting cavity, and formation pressure enters the boosting cavity to continuously push a rubber cylinder, so that the expansion sealing effect of the rubber cylinder is better, and the pressure resistance is improved.

The aim of the utility model is achieved by the following measures: a pressure measuring packer comprises an upper joint, a central pipe, an outer central pipe, a rubber cylinder, a spacer ring, a lower pressure ring, a lock spring seat, a lock spring, a setting piston, a fixed piston, a piston sleeve, a lower piston and a lower joint.

The upper joint is connected with the central pipe by screw thread, the upper joint is connected with the outer core pipe by screw thread, the rubber cylinder, the spacer ring and the lower press ring are sleeved outside the outer core pipe, the lock spring is sleeved in the outer groove of the lock spring seat, the lock spring seat is sleeved at the lower part of the outer core pipe, the outer core pipe and the lock spring seat are fixed by a deblocking pin, the setting piston and the fixed piston are sleeved outside the central pipe, the lower piston is sleeved outside the fixed piston, the piston sleeve is connected with the lower joint by screw thread, and the central pipe is connected with the lower joint by screw thread.

The upper joint is provided with a liquid inlet hole, the central tube is provided with a liquid inlet hole, an annular cavity is arranged between the central tube and the outer core tube, the outer core tube is provided with a liquid inlet hole, and a boosting cavity is arranged between the outer core tube and the lower pressing ring.

The upper joint and the central pipe are sealed by a rubber ring, the central pipe, the outer central pipe and the setting piston are sealed by a rubber ring, the outer central pipe and the lower pressing ring are sealed by a rubber ring, the setting piston and the fixed piston are sealed by a rubber ring, the fixed piston and the lower piston are sealed by a rubber ring, the lower piston and the piston sleeve are sealed by a rubber ring, and the piston sleeve and the lower joint are sealed by a rubber ring.

The pressure measuring device has novel structural design and reliable work, is used for layered pressure measuring operation of an oil field, has better pressure resistance, effectively solves the problem of packer failure caused by a high-pressure well in the pressure measuring operation, and improves the efficiency and the success rate of the pressure measuring operation.

Description of the drawings: fig. 1 is a schematic structural diagram of a pressure measuring packer.

1 top connection, 2 center tubes, 3 outer center tubes, 4 rubber cylinders, 5 spacing rings, 6 lower pressure rings, 7 lock spring seats, 8 lock springs, 9 setting pistons, 10 fixing pistons, 11 piston sleeves, 12 lower pistons, 13 lower connections, 14 first liquid inlet holes, 15 annular cavities, 16 second liquid inlet holes, 17 boosting cavities, 18 deblocking pins, 19 third liquid inlet holes and 20 fourth liquid inlet holes.

The specific implementation mode is as follows: a pressure measuring packer comprises an upper joint 1, a central pipe 2, an outer central pipe 3, a rubber cylinder 4, a spacer ring 5, a lower pressing ring 6, a lock spring seat 7, a lock spring 8, a setting piston 9, a fixed piston 10, a piston sleeve 11, a lower piston 12, a lower joint 13 and the like.

The upper joint 1 is provided with a first liquid inlet hole 14, an annular cavity 15 is arranged between the central tube 2 and the outer core tube 3, the outer core tube 3 is provided with a second liquid inlet hole 16, the outer core tube 3 and the lower compression ring 6 are provided with a boosting cavity 17, the outer core tube 3 and the lock spring seat 7 are fixedly connected by a deblocking pin 18, and the central tube 2 is provided with a third liquid inlet hole 19 and a fourth liquid inlet hole 20.

The number of the rubber cylinders 4 is three, and the number of the spacing rings 5 is two between the rubber cylinders 4.

The upper joint 1 and the central pipe 2 are sealed by a rubber ring, the central pipe 2, the outer central pipe 3 and the setting piston 9 are sealed by a rubber ring, the outer central pipe 3 and the lower pressing ring 6 are sealed by a rubber ring, the setting piston 9 and the fixed piston 10 are sealed by a rubber ring, the fixed piston 10 and the lower piston 12 are sealed by a rubber ring, the lower piston 12 and the piston sleeve 11 are sealed by a rubber ring, and the piston sleeve 11 and the lower joint 13 are sealed by a rubber ring.

The working principle and the using method of the oil and water well pressure measuring packer are as follows:

the upper joint 1 and the lower joint 13 are connected with a tubing string on the ground, then the tubing string is put into a preset underground position, the ground pump truck pressurizes the inside of the tubing string during setting, water enters a third liquid inlet hole 19 and a fourth liquid inlet hole 20 of a central tube 2 of the packer through the tubing string to push a setting piston 9 and a lower piston 12, the setting piston 9 pushes a lower pressing ring 6 when going upwards, and the lower pressing ring 6 pushes a rubber barrel 4 to expand when going upwards. When the oil pipe is pressurized to reach the rated setting pressure, the pressure is stopped, the outer clamping teeth of the locking spring 8 and the inner clamping teeth of the lower pressing ring 6 are mutually occluded and locked, the lower pressing ring 6 cannot move downwards, and the expansion sealing of the rubber barrel 4 is completed.

And during pressure measurement operation, the pressure of the formation is measured between the two sections of packers. Stratum pressure drive well fluid enters into the annular cavity 15 of center tube 2 and outer core tube 3 through the first feed liquor hole 14 of top connection 1, enter into the boosting chamber 17 between outer core tube 3 and lower clamping ring 6 through the second feed liquor hole 16 of outer core tube 3, stratum pressure is higher, the thrust of pushing down clamping ring 6 is bigger, packing element 4 rises to seal the effect better, the pressure resistance is higher, even if oil pipe stops to press, seat seals piston 9 and no longer continues to push down clamping ring 6, also can rely on stratum pressure to continue to push up packing element 4, reach the requirement of high pressure resistance.

When deblocking, the oil lifting pipe column drives the upper joint 1 and the outer core pipe 3 to move upwards, a deblocking pin 18 between the upper core pipe 3 and the lock spring seat 7 is cut off by means of lifting force, the lower pressing ring 6, the lock spring seat 7 and the lock spring 8 move downwards to the upper end face of the setting piston 9, the rubber barrel 4 is released to return, and the packer is lifted to the ground along with the pipe column.

Claims

1. A pressure measuring packer is characterized by comprising an upper joint, a central pipe, an outer central pipe, a rubber barrel, a spacer ring, a lower compression ring, a spring locking seat, a spring lock, a setting piston, a fixed piston, a piston sleeve, a lower piston and a lower joint; the upper joint is provided with a liquid inlet hole, the central pipe is provided with a liquid inlet hole, an annular cavity is arranged between the central pipe and the outer core pipe, the outer core pipe is provided with a liquid inlet hole, and a boosting cavity is arranged between the outer core pipe and the lower pressing ring; the upper joint is connected with the central pipe by screw thread, the upper joint is connected with the outer core pipe by screw thread, the rubber cylinder, the spacer ring and the lower press ring are sleeved outside the outer core pipe, the lock spring is sleeved in the outer groove of the lock spring seat, the lock spring seat is sleeved at the lower part of the outer core pipe, the outer core pipe and the lock spring seat are fixed by a deblocking pin, the setting piston and the fixed piston are sleeved outside the central pipe, the lower piston is sleeved outside the fixed piston, the piston sleeve is connected with the lower joint by screw thread, and the central pipe is connected with the lower joint by screw thread.