Rotary type fracture sand jet and multistage sand jetting and fracturing process

Abstract

The invention relates to a rotary type fracture sand jet and a multistage sand jetting and fracturing process. The rotary type fracture sand jet is structurally characterized in that an upper connector and a lower connector are connected with the two ends of the fracture sand jet; a rotary type slide sleeve inner core is arranged on the inner circumference of the fracture sand jet; a plurality of shear pin grooves are formed in the middle of the surface of the outer circumference of the rotary type slide sleeve inner core; a plurality of spring type extensible shear pin assemblies are arranged on a fracture sand jet body, and one spring type extensible shear pin assembly falls into the corresponding shear pin groove; a rotary control mechanism is arranged at the end, close to the upper connector, of the rotary type slide sleeve inner core; rotary sand jetting holes distributed evenly and circumferentially are formed in the end, close to the lower connector, of the rotary type slide sleeve inner core; outer sand jetting holes distributed evenly and circumferentially are formed in the fracture sand jet body; and the outer sand jetting holes correspond to the rotary sand jetting holes in position. A rotary opening type is adopted for the fracture sand jet. In the construction process, the opening process is stable and reliable, and construction can be conducted independently for a layer section; and after construction, a slide sleeve of the constructed layer section can be closed, and layered sand jetting management can be effectively conducted for the stratum.

Description

technical field [0001] The invention relates to a rotary fracturing sandblasting device and a multi-stage sandblasting fracturing process, which are used to realize large-displacement multi-stage layered reconstruction of vertical wells and horizontal wells inside casings, outside casings, and satisfy oil (gas) fields. The sand blaster required by the large-displacement fracturing reconstruction process. Background technique [0002] At present, the sliding sleeve sand blasters used in oil and gas field fracturing, acidizing, water injection and other construction processes all adopt the opening process of channel tools by throwing a ball to open the sliding sleeve, lowering the opening string to open the sliding sleeve, and weak electric induction to open the sliding sleeve. [0003] The above three opening processes have the following problems [0004] 1. In the technology of throwing balls to open the sliding sleeve, the pipe string can only be constructed step by step, ...

AI Technical Summary

Problems solved by technology

[0004] 1. In the technology of ball throwing and sliding sleeve, the pipe string can only be constructed step by step, without targeted construction ability, and the inner diameter of the pipe string is gradually reduced, so it is impossible to realize large-displacement construction in multi-stage construction

[0005] 2. Although the process of running and opening the string to open the sliding sleeve can be constructed for a certain layer, there are problems such as repeated running of the process string during the construction of the cased well, long operation period and high construction cost.

[0006] 3. The weak electric induction opening sliding sleeve needs to be brought into the sensing cable or weak point sensor in the process of lowering the pipe string. During the construction process, due to the complex situation in the well, it is very easy to cause the sensor to fail or the sliding sleeve cannot be opened.

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