CN201037385Y

CN201037385Y - Bridge type leak-stopping pipe column

Info

Publication number: CN201037385Y
Application number: CNU2006200994376U
Authority: CN
Inventors: 和新鹏; 肖国华; 常宝山; 李文戈
Original assignee: China Petroleum and Chemical Corp
Current assignee: China Petroleum and Chemical Corp
Priority date: 2006-10-17
Filing date: 2006-10-17
Publication date: 2008-03-19
Anticipated expiration: 2016-10-17

Abstract

The utility model discloses a bridge type leak stopping pipe string for oil-water well sleeve and is characterized in that the inside of the pipe string is provided with an upper oil production passage, the upper packer of an upper well cleanup channel, a lower oil production passage and the lower packer of a lower well cleanup channel which are connected through the water mixing pipe communicated with the upper well cleanup channel of the upper packer and the lower well cleanup channel of the lower packer. The utility model not only can plug the damaged part of a sleeve, but also has the characteristics of well cleanup, long plugging distance and convenience for operation.

Description

A kind of bridge-type leak stopping tubing string

Affiliated technical field

The present invention relates to a kind of oil well casing leak stopping tubing string, especially relate to a kind of washing well bridge-type leak stopping tubing string.Be applicable to the shutoff of oil well casing breakage, have shutoff distance, execute-in-place conveniently, and can well-flushing.

Background technology

During oil field development was produced, if sleeve pipe damages, formation water will flow into the pit shaft from the sleeve pipe breakage, influences oil well or well production, and serious also can pour in down a chimney the stratum, and causing can not ordinary production.Existing two kinds of methods of dealing with problems are that replacing damages sleeve pipe or at the supporting use Packer for blocking water of flow string shutoff oil sets annular space, the former is owing to exist problems such as cost of production height, off-time length to use less; The latter exist can not well-flushing problem, tubing string uses the phase of being excused from a college course shorter in the oil well of salt crust, fouling, wax deposition or well.

For addressing the above problem, known bridge-type leak stopping tubing string, the patent No. is CN02292253.9, mainly connect and the tubing string formed by secondary packer and two layers of concentric tube, owing to shutoff apart from reasons such as weak point, inconvenient operation, the The field scale is less.

Summary of the invention

Use at the scene in the deficiency that exists in order to overcome existing leak stopping tubing string, the utility model provides a kind of bridge-type leak stopping tubing string, and this tubing string can not only effectively carry out shutoff to the sleeve pipe breakage, has shutoff distance, execute-in-place conveniently, and can well-flushing.

The process program that the utility model adopted is: indoor design has last oil recovery runner, the upper packer of going up the well-flushing passage and indoor design that the lower packet of following oil recovery runner, following well-flushing passage is arranged, by with the last well-flushing passage of upper packer, the water mixing pipe of the following well-flushing channel connection of lower packet connects.According to the fixedly requirement of water mixing pipe, design has strapping, is used for fixing on water mixing pipe and the oil pipe.During use, the utility model is damaged in the corresponding flow string with sleeve pipe by the oil pipe connection, because the packer indoor design has the passage of production, well-flushing passage to be connected with flow string, the oil jacket annular space of packer shutoff sleeve pipe breakage, prevent that formation water from flowing out from the sleeve pipe breakage, flushing fluid enters from sleeve opening, by the well-flushing passage and the water mixing pipe well-flushing of packer.

The beneficial effects of the utility model are, can carry out shutoff to the sleeve pipe breakage, prevent leakage, and can well-flushing, for oil field development saves production cost.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is the utility model structural representation.

Among the figure: 1, upper packer, 2, lower packet, 3, sleeve pipe, 4, go up the oil recovery runner, 5, go up the well-flushing runner, 6, the water mixing pipe, 7, strapping, 8, oil pipe, 9, well-flushing runner down, 10, oil recovery runner down.

The specific embodiment

Referring to Fig. 1, indoor design has last oil recovery runner (4), the upper packer (1) of going up well-flushing passage (5) and indoor design that the lower packet (2) of following oil recovery runner (10), following well-flushing passage (9) is arranged, by with the last well-flushing passage (5) of upper packer (1), the water mixing pipe (6) that the following well-flushing passage (9) of lower packet (2) is communicated with connects.According to the fixedly requirement of water mixing pipe (6), design has strapping (7), and it adopts stainless steel material to make, and is used for fixing on water mixing pipe (6) and the oil pipe (8).During use, the utility model is damaged in the corresponding flow string with sleeve pipe by oil pipe (8) connection, because the packer indoor design has production passage (promptly go up oil recovery runner (4), descend oil recovery runner (10) to be referred to as), well-flushing passage (promptly go up well-flushing passage (5), descend well-flushing passage (9) to be referred to as) to be connected with flow string, the oil jacket annular space of packer shutoff sleeve pipe breakage, prevent that formation water from flowing out from the sleeve pipe breakage, flushing fluid enters from sleeve pipe (3) mouth, by the well-flushing passage and water mixing pipe (6) well-flushing of packer.Upper packer (1) design has last oil recovery runner (4), goes up well-flushing runner (5), and lower packet (2) design has following oil recovery runner (10), following well-flushing runner (9).With last well-flushing runner (5) and go up oil recovery runner (4) and is connected, the other end is connected with oil recovery runner (10) under following well-flushing runner (9) reaches with mode one end in parallel for water mixing pipe (6) and oil pipe (8), and strapping (7) is fixed on water mixing pipe (6) on the oil pipe (8).The oil jacket annular space of upper packer (1), lower packet (2) shutoff sleeve pipe (3) breakage prevents that formation water from flowing out from the sleeve pipe breakage, produces normal operation to guarantee to recover the oil.When needing well-flushing, following well-flushing runner (9) well-flushing of the last well-flushing runner (5) of the flushing fluid that pumps into from sleeve pipe (3) ground inlet by upper packer (1), water mixing pipe (6), lower packet (2).

Claims

1. bridge-type leak stopping tubing string, it is characterized in that: indoor design has last oil recovery runner, the upper packer of going up the well-flushing passage and indoor design that the lower packet of following oil recovery runner, following well-flushing passage is arranged, by with the last well-flushing passage of upper packer, the water mixing pipe of the following well-flushing channel connection of lower packet connects.

2. a kind of bridge-type leak stopping tubing string according to claim 1 is characterized in that: the design of water mixing pipe outside has strapping.