Full-bore infinite-order fracturing well completion assembly and technological method thereof

Abstract

The full-bore infinite-order fracturing well completion assembly comprises a fracturing well completion sliding sleeve and an opening tool used for opening the fracturing well completion sliding sleeve, the fracturing well completion sliding sleeve and the opening tool have multiple sequence combinations through a matching structure of a specific sliding block and a groove, and it is guaranteed that staged fracturing stages are not limited; according to the opening mode, one-key one-opening of the fracturing well completion sliding sleeve at any fixed point can be achieved, and one-key multi-opening of the first-stage multi-cluster fracturing well completion sliding sleeve can also be achieved. After pressing, the tool is opened and can be completely dissolved, so that the full bore of a well completion pipe string is realized; the continuous, rapid, large-scale, multi-stage and multi-cluster fracturing well completion construction requirements are met, and the fracturing efficiency is improved.

Description

technical field

[0001] The invention relates to a fracturing completion assembly for oil and water wells in the petroleum industry, in particular to a full-diameter infinite-stage fracturing completion assembly and a process method thereof. Background technique

[0002] At present, the fracturing and completion technologies used in low-permeability and tight oil reservoirs at home and abroad are mainly divided into two categories: open-hole multi-stage fracturing completion technology and casing cementing multi-stage fracturing completion technology. Its mainstream technology covers ball-sliding sleeve multi-stage fracturing completion, pumping bridge plug multi-stage fracturing completion, etc.

[0003] Among them, the ball-sliding sleeve type multi-stage staged fracturing completion technology, whether it is applied in open-hole fracturing completion or casing cementing fracturing completion, is a combination of balls and ball seats with different stages. Send balls of di...

Examples

Embodiment 1

[0059] refer to figure 1 , Figure 1a' , Figure 1b' , figure 2' , Figure 2a , image 3 and Figure 3a As shown, the full-bore infinite-stage fracturing completion assembly includes the fracturing completion sleeve and the opening tool for opening the fracturing completion sleeve. Wherein, the fracturing completion sliding sleeve includes a fixed outer sleeve 3-1 and an inner sliding sleeve 3-3 connected to the inner wall of the outer sleeve 3-1 through shear pins 3-5, the outer sleeve 3-1 and the inner sliding sleeve 3-3 Positioning pieces 3-6 are also arranged therebetween. Among them, sandblasting holes 3-4 (6-10 evenly distributed) and 2 positioning grooves 3-8 connected with the inner cavity are arranged on the outer casing 3-1, and a closing recess is arranged on the upper part of the inner sliding sleeve 3-3. The groove 3-2 is provided with an opening groove 3-7 at the lower part, and a plurality of sealing elements 3-9 are provided in the middle. The overcoat...

Embodiment 2

[0075] refer to figure 1 , Figure 1a , Figure 1b , figure 2 , Figure 2a and Figure 2b As shown, as a preferred embodiment, it is basically the same as Embodiment 1, except that the opening groove 3-7 includes a guide opening 3-13, a slider groove 3-11 and a guide groove 3-12. Wherein, the guide opening 3-13 is tapered and is connected with the slider groove 3-11 and the guide groove 3-12, the slider groove 3-11 cooperates with the opening slider 13-6, and the guide groove 3-11 is matched with the opening slider 13-6. 12 cooperates with guide key 13-8. Also be provided with connecting piece 13-7 between tool lower joint 13-9 and central pipe 13-4, form for opening slide between connecting piece 13-7 and tool upper joint 13-2 and central pipe 13-4. Block 13-6 carries out the limit groove of radial limit. A pressure cap 13-10 is provided between the connector 13-7 and the tool lower joint 13-9, and a plurality of guide keys 13-8 extending from the outer surface of the...

Embodiment 3

[0083] It is basically the same as Embodiment 1, the difference is that there are multiple opening grooves 3-7, which are distributed in a 360° spiral at the lower part of the inner sliding sleeve 3-3, and the opening groove 3-7 is connected with the inner sliding sleeve 3-3. The 3-axis has an inclination angle α, and the inclination angle α is 0-60°.

[0084] There are multiple first seals 3-9, the first seal 3-9 and the second seal 13-3 are rubber sealing rings, and the first seals 3-9 are respectively arranged on the sandblasting holes 3-4, shear Between the pin 3-5 and the positioning piece 3-6. The positioning members 3-6 in each embodiment are elastic positioning members.

technical field

[0001] The invention relates to a fracturing completion assembly for oil and water wells in the petroleum industry, in particular to a full-diameter infinite-stage fracturing completion assembly and a process method thereof. Background technique

[0002] At present, the fracturing and completion technologies used in low-permeability and tight oil reservoirs at home and abroad are mainly divided into two categories: open-hole multi-stage fracturing completion technology and casing cementing multi-stage fracturing completion technology. Its mainstream technology covers ball-sliding sleeve multi-stage fracturing completion, pumping bridge plug multi-stage fracturing completion, etc.

[0003] Among them, the ball-sliding sleeve type multi-stage staged fracturing completion technology, whether it is applied in open-hole fracturing completion or casing cementing fracturing completion, is a combination of balls and ball seats with different stages. Send balls of di...

Examples

Embodiment 1

[0059] refer to figure 1 , Figure 1a' , Figure 1b' , figure 2' , Figure 2a , image 3 and Figure 3a As shown, the full-bore infinite-stage fracturing completion assembly includes the fracturing completion sleeve and the opening tool for opening the fracturing completion sleeve. Wherein, the fracturing completion sliding sleeve includes a fixed outer sleeve 3-1 and an inner sliding sleeve 3-3 connected to the inner wall of the outer sleeve 3-1 through shear pins 3-5, the outer sleeve 3-1 and the inner sliding sleeve 3-3 Positioning pieces 3-6 are also arranged therebetween. Among them, sandblasting holes 3-4 (6-10 evenly distributed) and 2 positioning grooves 3-8 connected with the inner cavity are arranged on the outer casing 3-1, and a closing recess is arranged on the upper part of the inner sliding sleeve 3-3. The groove 3-2 is provided with an opening groove 3-7 at the lower part, and a plurality of sealing elements 3-9 are provided in the middle. The overcoat...

Embodiment 2

[0075] refer to figure 1 , Figure 1a , Figure 1b , figure 2 , Figure 2a and Figure 2b As shown, as a preferred embodiment, it is basically the same as Embodiment 1, except that the opening groove 3-7 includes a guide opening 3-13, a slider groove 3-11 and a guide groove 3-12. Wherein, the guide opening 3-13 is tapered and is connected with the slider groove 3-11 and the guide groove 3-12, the slider groove 3-11 cooperates with the opening slider 13-6, and the guide groove 3-11 is matched with the opening slider 13-6. 12 cooperates with guide key 13-8. Also be provided with connecting piece 13-7 between tool lower joint 13-9 and central pipe 13-4, form for opening slide between connecting piece 13-7 and tool upper joint 13-2 and central pipe 13-4. Block 13-6 carries out the limit groove of radial limit. A pressure cap 13-10 is provided between the connector 13-7 and the tool lower joint 13-9, and a plurality of guide keys 13-8 extending from the outer surface of the...

Embodiment 3

[0083] It is basically the same as Embodiment 1, the difference is that there are multiple opening grooves 3-7, which are distributed in a 360° spiral at the lower part of the inner sliding sleeve 3-3, and the opening groove 3-7 is connected with the inner sliding sleeve 3-3. The 3-axis has an inclination angle α, and the inclination angle α is 0-60°.

[0084] There are multiple first seals 3-9, the first seal 3-9 and the second seal 13-3 are rubber sealing rings, and the first seals 3-9 are respectively arranged on the sandblasting holes 3-4, shear Between the pin 3-5 and the positioning piece 3-6. The positioning members 3-6 in each embodiment are elastic positioning members.

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