Zhongshan Broad-Ocean Motor Co., Ltd.

China Petroleum Chemical Corporation

Sinopec Southwest Oil & Gas Company

Zhongshan Broad-Ocean Motor Manufacturing Co., Ltd.

Wei Lei

Yanhu Lin

Zhimin Hou

Jianhua Zeng

Xianjun Liu

Xiongcheng Wang

Chen Chen

Miao Zhang

Wei Zhao

Wenbo Yang

Shunqu Hu

Zhi Xie

Song Jia

Yunyi Luo

Wenqing Bian

Jun Chen

Hairong Sun

Zhenwei Gan

Xiao Xiong Liu

Hongyu Jia

Qiang Wang

Bin Qi

Shikun Chen

Xiaosan Xu

Dan Hu

Qixiang Xiang

Yijun Zhou

Yongmao Lin

Huijun Zhan

Shaner Zhang

Fengqi Wang

Zeyan Jiang

Jingyu Cui

Shenglong Guo

Jie Zhang

Xuanfeng Wen

Xiaogang Wang

Zhiguo Qiao

Zhou Fang

Lin Lan

Haoquan Zhou

Haifeng Dong

Xingwen Wang

Yancheng Yan

Kunpan Liu

A wellbore staged operation method includes running, after a first well drifting operation is performed on a wellbore, a pipe string () in the wellbore, wherein the pipe string () includes, along a direction from bottom to top, a floating hoop (), a plug seat (), a toe-end sliding sleeve (), and a fracturing sliding sleeve (); performing a cementing operation, wherein cement slurry pumped into an inner chamber of the pipe string () enters an annulus between the pipe string and the wellbore through the plug seat () and the floating hoop () to form a cement sheath, the cement sheath isolating the toe-end sliding sleeve () from the fracturing sliding sleeve (); performing a second drifting operation to ensure the toe-end sliding sleeve () of the pipe string () exposed; performing a pressure test for the pipe string; and performing staged fracturing constructions.

Wellbore staged operation method and rubber plug for said method

A method for protecting a motor from overheating, includes: running a motor in a given parameter P and detecting a real-time temperature R of the motor; comparing the real-time temperature R with a plurality of set temperatures, the plurality of set temperatures including an overheating protection temperature Rm, shutdown temperature Rmax and recovery operation temperature Rmin, Rmin<Rm<Rmax; according to a comparison result, controlling the motor to operate at an initial current value I, or operate in a reduced current value with respect to the initial current value I, or stop running; and when the real-time temperature R meets the condition: Rm<R<Rmax, running the motor in an overheating protection mode, where the motor operates in a current value I lower than the initial current value I, and the current value I decreases with the increase of the real-time temperature R.

Method for protecting motor from overheating

A differential-pressure sliding sleeve has an outer cylinder with a flow guiding hole being provided in a wall of the outer cylinder, an inner cylinder arranged in an inner cavity of the outer cylinder, an upper joint extending into the outer cylinder and fixedly connected to an upper end of the outer cylinder, a lower joint extending into the outer cylinder and fixedly connected to a lower end of the outer cylinder, and a dissolvable carrier ring arranged between the lower joint and the inner cylinder. An area of the axial upper end surface of the inner cylinder is greater than that of an axial lower end surface thereof, so that the working fluid generates a pressure difference to provide downward pressure for the inner cylinder, which moves downward under the pressure after the carrier ring is dissolved to open the flow guiding hole.

Differential pressure sliding sleeve, and oil and gas well fracturing construction method using same

An air blower, including a volute, a centrifugal wind wheel, and a motor. The volute includes an end plate, a side plate extending from an edge of the end plate, and a cavity formed by the end plate and the side plate; the centrifugal wind wheel is disposed in the cavity; the end plate includes an air inlet, and two ends of the side plate are disposed side by side to form an air outlet; the end plate further includes a support beam opposite to the air inlet, and the motor is disposed on the support beam.

Air blower and exhaust fan comprising the same

A windmill, including a first end plate, a second end plate, and a plurality of primary blades disposed between the first end plate and the second end plate. The first end plate includes a central part provided with a base connected to a motor shaft. The second end plate includes a central part provided with an air inlet; the space between every two adjacent blades forms an air channel. The plurality of primary blades each includes an outmost end with respect to the central part of the first end plate, and the outmost end extends out of an outer edge of the second end plate. The connection line of every two adjacent outmost ends of the plurality of primary blades forms a circle, and the diameter Dof the circle is larger than the diameter Dof the second end plate.

Windmill and blower comprising the same

A device for perforating, packing, and fracturing and a tubing string comprising the device are disclosed, wherein the device comprises an upper connector, a nozzle sleeve, a mandrel, a packer, a lower connector, a first inner sleeve provided inside the upper connector, and a second inner sleeve provided inside the nozzle sleeve, further wherein the upper connector is provided with a fracturing hole, and a nozzle is provided at the nozzle sleeve.

Device for jet packing and fracturing and tubular column comprising same

A volute assembly including a volute and a cover plate. The volute includes a cavity. The cover plate is disposed on the volute and covers the cavity. The cover plate includes an air inlet; the volute includes an exhaust duct. The exhaust duct includes an air outlet. The exhaust duct includes a first part, a second part, and a third part sequentially connected in that order. The first part is directly connected to the volute. The air outlet is disposed on the third part. The inner diameter of the second part increases in the direction from the first part to the third part.

Volute assembly and induced draft fan comprising the same

A blower, including a scroll casing, a fan impeller, a motor, and a pressure measuring connector. The scroll casing includes a chamber, an air inlet, and an air outlet. The air inlet and the air outlet communicate with the chamber. The motor is disposed on the scroll casing. A drive end of the motor is inserted into the chamber and is connected to the fan impeller. The pressure measuring connector is disposed on the scroll casing. A channel is disposed in the pressure measuring connection, and the channel communicates with the chamber. The channel includes a first subchannel and a second subchannel. The first subchannel communicates with the second subchannel, and an inner diameter of the first subchannel is larger than an inner diameter of the second subchannel.

Blower comprising a pressure measuring connector

An induced draft fan, including a volute including a chamber and an air discharge pipe; and a wind wheel disposed in the chamber of the volute. The wind wheel is connected to and operationally driven by a rotation shaft of a motor. The air discharge pipe is disposed on one side of the volute, and includes an inner pipe and an outer pipe surrounding the inner pipe. The inner pipe of the air discharge pipe communicates with the chamber, to form an air discharge passage. An annular groove is disposed between the inner pipe and the outer pipe; and the outer end of the outer pipe is provided with a curved groove, the curved groove extends axially and circumferentially to divide the outer pipe into a fixed part and a flexible part.

Induced draft fan and gas furnace comprising the same

An induced draft fan, including: a housing, a wind wheel, an AC motor, and a controller. The controller includes: an AC-DC conversion circuit, a microprocessor, a Hall sensor, a drive circuit, and a relay. The input end of the AC-DC conversion circuit is connected to an external AC input, and the output end of the AC-DC conversion circuit supplies a DC current to each circuit part. The input end of the relay is connected to the external AC input, and the output end of the relay supplies power for corresponding parts. A magnetic ring is disposed on a rotating shaft of the AC motor. The Hall sensor is disposed close to the magnetic ring for detecting a signal of a rotational speed of the AC motor and inputting the signal of the rotational speed into the microprocessor. The microprocessor controls energization or deenergization of the relay.

Induced draft fan

A volute mechanism for a blower, the mechanism including: a volute (), the volute () including a cavity () and a first through hole (); and a manometric interface (), the manometric interface () including a second through hole () inside. The cavity () is arranged inside the volute () for accommodating a wheel. The manometric interface () is disposed in the first through hole () and is movable along an axial direction of the first through hole (). The second through hole () and the cavity () are in communication.

Volute mechanism for blower

An induced draught fan, including: a motor, the motor including a shaft; a volute; and a wind wheel. The volute is provided with an air intake and an air outlet. The wind wheel is arranged inside the volute. The top of the volute is provided with a through-hole. The shaft of the motor passes through the through-hole and is connected to the wind wheel. A seal ring is arranged on the volute corresponding to the through-hole. An outer side of the seal ring is provided with an annular groove. The volute is embedded in the annular groove. The middle of the seal ring is provided with a center hole. The middle of the side wall of the center hole is provided with a ring-like convex edge. The shaft passes through the center hole and contacts with the ring-like convex edge.

Induced draught fan

A connecting structure for use between a wind wheel of a blower and a motor shaft in combination with the wind wheel () and the connecting structure including a shaft sleeve (). The wind wheel () includes a bottom plate (), and the bottom plate () is convex to form a sleeve cover (). A bottom surface and a side surface of the shaft sleeve () is wrapped by the sleeve cover (). A thread () is arranged on an end of the shaft (). A shaft step () is arranged on the shaft () at an inner side of the thread (). The thread () arranged on the end of the shaft () is inserted into a threaded hole () arranged inside the shaft sleeve (). The shaft step () is attached to a top surface of the shaft sleeve.

Connecting structure

A connecting structure, including: a volute including an air inlet and an air outlet; and a conversion interface. A connecting part is disposed on an outer side of the air outlet. The connecting part includes: a lower plate; a lower lug protruding outward from each end of the lower plate; and an upper flange disposed above the lower plate. The conversion interface includes a sleeve. An upper plate protrudes from a rear part of the sleeve. Two upper lugs protrude outward from two ends of the upper plate, respectively. A lower flange is disposed on the rear part of the sleeve beneath the upper plate. The upper plate is disposed on the upper flange. The lower flange is disposed on a curved convex block that protrudes upward from an outer edge of the lower plate. The upper lug is disposed on the lower lug.

Connecting structure between volute of blower and conversion interface

Blower

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Zhongshan, China

Wei Lei