CN211008567U

CN211008567U - Large-drift-diameter drillable composite bridge plug

Info

Publication number: CN211008567U
Application number: CN201921928571.6U
Authority: CN
Inventors: 廉军; 赵元; 唐廷基
Original assignee: Shenyang Huawei Petroleum Machinery Manufacturing Co ltd
Current assignee: Shenyang Huawei Petroleum Machinery Manufacturing Co ltd
Priority date: 2019-11-11
Filing date: 2019-11-11
Publication date: 2020-07-14
Anticipated expiration: 2029-11-11

Abstract

The utility model discloses a compound bridge plug can be bored to big latus rectum, this compound bridge plug can be bored to big latus rectum include the top connection and with top connection threaded connection's center tube, the top connection with the center tube be connected the back and form the equal internal diameter siphunculus, from top to bottom the center tube outside in proper order the cover be equipped with the retaining ring, go up the slips, go up cone, packing element subassembly, cone, lower slips, the center tube is the combined material center tube, be equipped with the guide shoe integrative with the center tube at the lower extreme of center tube, the guide shoe is straight cylinder crew cut guide shoe, and the external diameter of guide shoe is greater than or equal to the retaining ring, goes up the slips, goes up cone, packing element subassembly, the maximum external diameter of slips down, and the external diameter of top connection is less than the external diameter of retaining ring, is equipped with safe steady. The composite bridge plug with the large drift diameter and capable of drilling overcomes the defects of the bridge plug with the large drift diameter in the prior art, the inner diameter is larger on the premise of ensuring normal setting, and the use requirement of upper layer packing in a multi-pipe concentric separate layer water injection pipe column can be met.

Description

Large-drift-diameter drillable composite bridge plug

Technical Field

The utility model relates to a drillable bridge plug that oil field used in the pit, especially a large drift diameter drillable composite bridge plug for separate layer water injection pipe column used.

Background

The oil field need separate each oil reservoir in the sleeve with the bridging plug when the separate layer water injection operation, when adopting the concentric separate layer water injection tubular column of multitube to carry out the water injection, the diameter of water injection pipe is the ladder from top to bottom and steadilys decrease, consequently, has sufficient runner sectional area in order to guarantee that the water injection pipe of inlayer has, needs to increase the diameter of outmost water injection pipe as far as possible, this just requires to use the big latus rectum bridging plug to seal the annular space between sleeve and the outmost water injection pipe in the upper strata of water injection well. When the drillable bridge plug is set, a special setting tool is mostly adopted to push down the retaining ring on the upper part of the drillable bridge plug, so that the slips and the rubber cylinder generate radial expansion deformation under the joint extrusion of the retaining ring and the guide shoe at the lower end of the central pipe, and the setting is realized. The current center tube that can bore the bridging plug is split type structure with the guide shoe, and the guide shoe is mostly straight section of thick bamboo inclined plane guide shoe, and the guide shoe passes through threaded connection with the center tube lower extreme. The drillable bridge plug with the structure has enough strength for ensuring that the guide shoe and the central pipe are connected, so as to prevent the guide shoe from falling off from the lower end of the central pipe under the pushing action of the rubber cylinder and the slips in the setting process, and the central pipe and the guide shoe are required to have enough thickness to ensure that the central pipe and the guide shoe after the thread is machined have enough strength. The diameter of the casing of the water injection well is a fixed specification, so that the drift diameter of the drillable bridge plug with the structure is limited, and the drift diameter of the drillable bridge plug with the structure usually does not exceed 50mm, so that the drillable bridge plug with the structure is difficult to meet the use requirement of a multi-pipe concentric separate-zone water injection string.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is: the utility model provides a big latus rectum composite bridge plug that can bore, this big latus rectum composite bridge plug that can bore has overcome the above-mentioned defect that the bridge plug that can bore exists among the prior art, and the internal diameter is bigger under the prerequisite of guaranteeing normal setting, can satisfy the operation requirement that the upper strata sealed apart in the concentric layering water injection tubular column of multitube.

The technical scheme for solving the technical problem is as follows: the utility model provides a large-drift diameter composite bridge plug that can bore, includes top connection and the center tube with top connection threaded connection, forms the equal internal diameter siphunculus after top connection and center tube are connected, from top to bottom overlaps in proper order and is equipped with retaining ring, goes up slips, goes up cone, packing element subassembly, cone, slips down outside the center tube, the center tube is the combined material center tube, is equipped with the guide shoe integrative with the center tube at the lower extreme of center tube, the guide shoe is straight section of thick bamboo crew cut guide shoe, and the external diameter of guide shoe is greater than or equal to the maximum external diameter of retaining ring, last slips, last cone, packing element subassembly, cone, slips down, and the external diameter of top connection is less than the external diameter of retaining ring.

As the improvement of the utility model: the lower cone is provided with a safe stable nail.

As a further improvement of the utility model: the upper cone is provided with a safe stable nail.

As the utility model discloses a further improvement again: the rubber cylinder component comprises a middle rubber cylinder, and the upper end and the lower end of the middle rubber cylinder are respectively provided with an end rubber cylinder.

As another improvement of the utility model: and the upper joint is provided with a plurality of radial fixing pin holes for connecting setting tools.

As the preferred scheme of the utility model: the inner diameter of the central tube is 90-96 mm.

As the best proposal of the utility model: the inner diameter of the central tube was 94 mm.

Has the advantages that: the utility model discloses a compound bridge plug can be bored to big latus rectum owing to adopted the top connection to be connected the internal diameter siphunculus such as back formation with the center tube, makes a body structure with the guide shoe with the center tube to adopt straight section of thick bamboo crew cut guide shoe, the wall thickness of center tube and guide shoe when having overcome among the prior art when center tube and guide shoe adopt threaded connection is big and causes the drawback that the bridge plug latus rectum is little, thereby makes under the prerequisite of guaranteeing that the bridge plug normally reliably sits to seal the utility model discloses a compound bridge plug can be bigger to big latus rectum, can satisfy the operation requirement of the concentric layering water injection tubular column of multitube. Owing to adopted cone and last cone to be equipped with down and prevented cone, go up the cone and produce axial displacement's safe steady nail at the center tube outer wall when with the sleeve pipe scraping, avoided putting the tubular column under and lifting tubular column operation in-process bridging plug and sleeve pipe scraping and lead to the packing element mistake inflation and obstruct operation or sticking well, improved the utility model discloses a reliability of big latus rectum drillable composite bridging plug work. Because adopted the packing element subassembly includes middle packing element, and both ends respectively are equipped with the technical characterstic of an end packing element about middle packing element, make the bridging plug seal the annular space between sleeve pipe and the water injection pipe and separate the effect better, and the water injection pressure that can bear is higher, and job stabilization nature is better. Owing to adopted to be equipped with a plurality of technical characteristics that are used for connecting the radial fixed pinhole of setting instrument on the top connection, make the utility model discloses a big latus rectum can bore compound bridging plug can conveniently be connected with special setting instrument. Owing to rationally injecing the internal diameter of center tube, made the utility model discloses a big latus rectum is bored compound bridging plug can conveniently use with standard sleeve pipe and water injection pipe among the prior art are supporting, the utility model discloses a big latus rectum is bored compound bridging plug can satisfy the supporting operation requirement of the four-pipe layering water injection technology tubular column that CN105443092A discloses.

Drawings

The large-bore drillable composite bridge plug of the present invention will be described in further detail with reference to the accompanying drawings.

FIG. 1 is a schematic axial sectional view of a large-bore drillable composite bridge plug according to the present invention;

fig. 2 is an axial sectional structural view of a conventional drillable bridge plug of the prior art.

Detailed Description

As shown in figure 1, the utility model discloses a big latus rectum composite bridge plug that can bore, including top connection 2 and with top connection threaded connection's center tube 11, be equipped with the radial fixed orifices 1 that is used for connecting the setting instrument on the top connection, the internal diameter D of top connection and center tube₁Equal, 90-96 mm, preferably 94 mm. The pipe comprises an upper joint, a central pipe, a retaining ring 3, an upper slip 4, an upper cone 5, a rubber cylinder assembly, a lower cone 10 and a lower slip 12, wherein the upper joint and the central pipe are connected to form an equal-inner-diameter through pipe, the central pipe is sleeved with the retaining ring 3, the upper slip 4, the upper cone 5, the rubber cylinder assembly, the lower cone 10 and the lower slip 12 from top to bottom in sequence, the central pipe is a composite material central pipe, a guide shoe 13 integrated with the central pipe is arranged at the lower end of the central pipe, the guide shoe is a straight-cylinder₂Greater than or equal to retainer ring, upper slip, upper cone and rubber cylinder assemblyThe maximum outer diameter of the lower cone and the lower slip, and the outer diameter of the upper joint is smaller than that of the retainer ring. The upper cone and the lower cone are respectively provided with a safe stable nail 9 for preventing the upper cone and the lower cone from generating axial displacement on the outer wall of the central tube when being scraped with the sleeve. The rubber cylinder component comprises a middle rubber cylinder 7, and the upper end and the lower end of the middle rubber cylinder are respectively provided with an end rubber cylinder (6, 8).

The utility model discloses an except that last slips, lower slips are the metalwork in the compound bridging plug can be bored to big latus rectum, other all parts are made by drillable combined material, and wherein center tube and guide shoe are by the whole injection moulding of drillable combined material, the preferred resin glass fiber composite that uses of drillable combined material. The large-drift-diameter drillable composite bridge plug of the utility model is arranged on a special setting tool when setting, the setting tool is locked with the bridge plug through a plurality of radial fixing pin holes of the upper joint, a hooking device which can pass through a drillable bridge plug central tube and hook a guide shoe from the lower end of a straight cylinder flat head guide shoe is arranged in the setting tool, when the setting ring in the setting tool pushes down the retainer ring, the slips and the rubber cylinder assembly are pressed between the retainer ring and the annular boss at the upper end of the guide shoe to generate radial expansion to realize setting, in the process, the hooking device at the lower end of the guide shoe generates upward tension to the guide shoe, so that the guide shoe can be effectively prevented from being broken with the central pipe when being subjected to downward thrust, the large-drift-diameter drillable composite bridge plug of the utility model can ensure normal and reliable setting by adopting the thin-wall central pipe, conditions are created for further increasing the drift diameter, thereby making the utility model discloses a big latus rectum can bore compound bridge plug's internal diameter can reach more than 90 mm. The straight cylinder flat head guide shoe is adopted, so that the pulling force of the hooking device in the setting tool on the guide shoe is more uniform, the state of the guide shoe is more stable when the guide shoe is stressed, and the setting reliability is further ensured.

Claims

1. The utility model provides a big latus rectum composite bridge plug that can bore, includes the top connection and with top connection threaded connection's center tube, characterized by: the upper joint and the central pipe are connected to form an equal-inner-diameter through pipe, a check ring, an upper slip, an upper cone, a rubber cylinder assembly, a lower cone and a lower slip are sequentially sleeved outside the central pipe from top to bottom, the central pipe is a composite material central pipe, a guide shoe integrated with the central pipe is arranged at the lower end of the central pipe, the guide shoe is a straight-cylinder flat-head guide shoe, the outer diameter of the guide shoe is larger than or equal to the maximum outer diameter of the check ring, the upper slip, the upper cone, the rubber cylinder assembly, the lower cone and the lower slip, and the outer diameter of the upper joint is smaller than the outer.

2. The large-bore drillable composite bridge plug of claim 1, further comprising: the lower cone is provided with a safe stable nail.

3. The large-bore drillable composite bridge plug as defined in claim 1 or 2, wherein: the upper cone is provided with a safe stable nail.

4. The large-bore drillable composite bridge plug of claim 3, further comprising: the rubber cylinder component comprises a middle rubber cylinder, and the upper end and the lower end of the middle rubber cylinder are respectively provided with an end rubber cylinder.

5. The large-bore drillable composite bridge plug of claim 4, wherein: and the upper joint is provided with a plurality of radial fixing pin holes for connecting setting tools.

6. The large-bore drillable composite bridge plug of claim 5, wherein: the inner diameter of the central tube is 90-96 mm.

7. The large-bore drillable composite bridge plug of claim 6, further comprising: the inner diameter of the central tube was 94 mm.