CN-120312160-B - Packer for fracturing with strong anti-jamming capability

Abstract

A packer with strong anti-seizing capability for fracturing relates to the technical field of downhole tools in oil fields. The lower part of the central tube is sequentially sleeved with three separating rings and two rubber drums, the lower part of the central tube is connected with an adapter sleeve through a sealing ring and a deblocking pin B, the lower part of the adapter sleeve is in threaded sealing connection with a lower joint, a step ring groove at the connecting part of the adapter sleeve and the lower joint is connected with a rotating sleeve, an inner hole of the rotating sleeve is welded with a helical blade, the adapter sleeve is provided with a liquid inlet A, and the outer circle of the rotating sleeve is uniformly provided with a cleaning mechanism. The invention has the advantages that the inner wall of the sleeve is cleaned by throwing the small-diameter soluble ball into the sleeve and the boosting driving cleaning structure, the switch of the cleaning channel can be controlled by arranging the soluble supporting sleeve, the supporting sleeve is dissolved after the cleaning is finished, then the sliding sleeve descends to close the cleaning channel, the soluble shaft is dissolved to open the setting channel, the large-diameter soluble ball is thrown into the boosting setting, the setting force can be adjusted by pressure, the setting is reliable, the releasing and the deblocking functions are realized, the overhaul operation is not needed, and the operation cost is reduced.

Inventors

• WANG CHENGJUN

Assignees

• 大庆市璞庆钻采设备制造有限公司

Dates

Publication Date

20260505

Application Date

20250521

Claims (2)

1. 1. The packer for fracturing with high anti-jamming capability comprises an upper joint (1) and a lower joint (2), and is characterized in that an inner hole of the upper joint (1) is in threaded sealing connection with a central tube (3), the outer circle of the upper joint (1) is connected with an outer cylinder (4) through a sealing ring and a deblocking pin A (25), a piston (5) is arranged between the outer cylinder (4) and the central tube (3), the piston (5) is in clearance fit with the outer cylinder (4) and the central tube (3) through the sealing ring, the outer circle of the central tube (3) is in threaded connection with a one-way sleeve (26) at the upper part of the piston (5), the one-way sleeve (26) is in clearance fit with the outer cylinder (4) and the central tube (3) through the sealing ring, a one-way valve (29) is arranged on the one-way sleeve (26), fluid flows downwards unidirectionally, and a liquid inlet B (28) is formed in the upper position of the one-way sleeve (26); The lower part of the piston (5) is sequentially sleeved with three spacer rings (6) and two rubber barrels (7), the rubber barrels (7) and the spacer rings (6) are alternately arranged, the lower part of the central pipe (3) is connected with an adapter sleeve (8) through a sealing ring and a deblocking pin B (32), the adapter sleeve (8) is propped against the bottom of the lowermost spacer ring (6), the lower part of the adapter sleeve (8) is in threaded sealing connection with a lower joint (2), the connecting part of the adapter sleeve (8) and the lower joint (2) is provided with a step ring groove (20), the step ring groove (20) is connected with a rotary sleeve (9) through a bearing and the sealing ring, an inner hole of the rotary sleeve (9) is welded with a spiral blade (16), the adapter sleeve (8) is provided with a liquid inlet hole A (19) at the position of the step ring groove (20), the lower part of the step ring groove (20) is provided with a liquid discharge hole (11) which is communicated with the outside, and the outer circle of the rotary sleeve (9) is uniformly provided with a cleaning mechanism; Each set of cleaning mechanism comprises an upper ear plate (12) and a lower ear plate (12), the ear plates (12) are welded on the outer circle of a rotary sleeve (9), pin shafts (14) are inserted into inner holes of the two ear plates (12), a centrifugal plate (10) is sleeved outside the pin shafts (14), the pin shafts (14) are positioned on the inner side of the centrifugal plate (10), steel wires (13) are implanted into the outer side end surfaces of the centrifugal plate (10), the steel wires (13) are fully distributed on the outer side end surfaces of the centrifugal plate (10), limiting plates (15) are welded on the rotary sleeve (9), an extension spring is hung between the limiting plates (15) and the centrifugal plate (10), so that the centrifugal plate (10) and the steel wires (13) are positioned in a step ring groove (20), a soluble shaft (27) is inserted into a liquid inlet hole B (28), step caps are arranged outside the soluble shaft (27) and the liquid inlet hole B (28) are in clearance fit through sealing rings, the inner holes of a lower joint (2) are connected with a lower ball seat (21), the lower ball seat (21) is made of a metal ball seat (23) through a sealing ring, and the upper ball seat (23) can be made of a lower ball seat (23) through the metal ball seat (23); The inner hole of the adapter sleeve (8) is larger than the inner holes of the lower connector (2) and the central tube (3), a sliding sleeve (17) and a supporting sleeve (18) are arranged in the inner hole of the adapter sleeve (8), the sliding sleeve (17) is located on the upper portion of the supporting sleeve (18), the sliding sleeve (17) is in clearance fit with the adapter sleeve (8) through an upper sealing ring and a lower sealing ring, the supporting sleeve (18) is composed of a supporting ring (1801) on the lower portion and a supporting column (1802) on the upper portion, the supporting sleeve (18) is made of soluble metal, the supporting sleeve (18) falls on the lower connector (2), a compression spring is arranged between the sliding sleeve (17) and the central tube (3), and a liquid inlet A (19) is located on the supporting column (1802).
2. 2. The packer with strong anti-seizing capability for fracturing is characterized in that a permanent magnet ring A (30) is inlaid on the outer circle of a piston (5), a permanent magnet ring B (31) is inlaid in the inner hole of an outer cylinder (4), and the magnetic poles of contact surfaces of the permanent magnet ring A (30) and the permanent magnet ring B (31) are opposite.

Description

Packer for fracturing with strong anti-jamming capability Technical Field The invention relates to the technical field of oil and gas production equipment of oil fields, in particular to a packer with high anti-jamming capability for fracturing. Background The packer is a commonly used tool in oil extraction and water injection of a water well, and can separate different oil layers and water layers, and separate water injection is realized by controlling water flow during water injection. The use of a packer may help to achieve zonal recovery and zonal flooding. The packer is connected to the underground pipe column and is used for sealing an underground tool for isolating oil pipes and oil gas well casings or annular spaces of open hole well walls, when the existing packer is used for running down the well, oil residues and other substances are attached to the inner wall of the casing for a long time, the sealing effect of the packing element and the casing is poor, when the sealing effect is poor, the sealing pin is not sheared off, the packer is clamped in a shaft, overhaul operation is needed, the operation period is long, and the operation cost is high. Disclosure of Invention The invention provides a fracturing packer with high anti-jamming capability, which aims to solve the problem that the sealing between a rubber cylinder of the packer and a sleeve is affected by the fact that oil residues and other substances are attached to the inner wall of the sleeve of the existing packer. The technical scheme provided by the invention is that the packer for fracturing with high anti-jamming capability comprises an upper joint and a lower joint, wherein an inner hole of the upper joint is in threaded sealing connection with a central pipe, an outer circle of the upper joint is connected with an outer cylinder through a sealing ring and a deblocking pin A, a piston is arranged between the outer cylinder and the central pipe, the piston is in clearance fit with the outer cylinder and the central pipe through the sealing ring, an outer circle of the central pipe is in threaded connection with a one-way sleeve at the upper part of the piston, the one-way sleeve is in clearance fit with the outer cylinder and the central pipe through the sealing ring, a one-way valve is arranged on the one-way sleeve, fluid flows downwards in one direction, and a liquid inlet B is formed in the upper part of the one-way sleeve; The central tube is sleeved with three spacing rings and two rubber drums in sequence at the lower part of the piston, the rubber drums and the spacing rings are alternately arranged, the lower part of the central tube is connected with an adapter sleeve through a sealing ring and a deblocking pin B, the adapter sleeve is propped against the bottom of the lowermost spacing ring, the lower part of the adapter sleeve is in threaded sealing connection with a lower joint, a step ring groove is formed in the connecting part of the adapter sleeve and the lower joint, the step ring groove is connected with a rotary sleeve through a bearing and the sealing ring, a spiral blade is welded in an inner hole of the rotary sleeve, the adapter sleeve is provided with a liquid inlet A at the position of the step ring groove, the lower part of the step ring groove is provided with a liquid discharge hole which is communicated with the outside, and a cleaning mechanism is uniformly arranged on the outer circle of the rotary sleeve. Each set of cleaning mechanism comprises an upper ear plate and a lower ear plate, the ear plates are welded on the excircle of the rotary sleeve, pin shafts are inserted into inner holes of the two ear plates, a centrifugal plate is sleeved outside the pin shafts, the pin shafts are located on the inner sides of the centrifugal plates, steel wires are implanted into the outer side end faces of the centrifugal plates, the steel wires are fully distributed on the outer side end faces of the centrifugal plates, limiting plates are welded on the rotary sleeve, an extension spring is hung between the limiting plates and the centrifugal plates, the centrifugal plates and the steel wires are located in a step ring groove, a soluble shaft is inserted into a liquid inlet B, a step cap is arranged outside the soluble shaft, the soluble shaft and the liquid inlet B are in clearance fit through a sealing ring, a lower joint inner hole is connected with a lower ball seat through a sealing ring and a soluble pin A, the lower ball seat is made of soluble metal, the central pipe is made of soluble metal through a lower ball seat passing through the sealing ring and the soluble pin B on the lower part of the liquid inlet B, and the inner hole of the upper ball seat is larger than the inner hole of the lower ball seat. The inner hole of the adapter sleeve is larger than the inner holes of the lower connector and the central tube, the inner hole of the adapter sleeve is provided with a sliding sleeve and a supporti