CN-116677357-B - Ball throwing device for sleeve pipe sliding sleeve fracturing

CN116677357BCN 116677357 BCN116677357 BCN 116677357BCN-116677357-B

Abstract

The invention relates to a ball throwing device for sleeve pipe sliding sleeve fracturing, which comprises a fracturing ball one-by-one throwing device, an upper blanking valve, a lower blanking valve and a pressure balancing device, wherein the upper blanking valve is positioned above the lower blanking valve, the pressure balancing device comprises a balancing bin and a material throwing channel, the balancing bin is assembled between the upper blanking valve and the lower blanking valve in a sealing way, the material throwing channel is vertically arranged in the balancing bin, the upper end port and the lower end port of the material throwing channel are respectively communicated with the lower valve port of the upper blanking valve and the upper valve port of the lower blanking valve, an air hole is arranged on the material throwing channel, a pressure balancing pipeline is arranged between the side wall of the balancing bin and a blanking wellhead, a pressure relief pipeline is arranged on the side wall of the balancing bin, a buffer mechanism is arranged on the material throwing channel, and the outlet of the fracturing ball one-by-one throwing device is communicated with the upper valve port of the upper blanking valve. The hydraulic fracturing ball well-entering device has the advantages that the hydraulic fracturing ball well-entering device can realize pressurized operation, and the high-pressure sealing in the well is realized through the switching of the two blanking valves, so that the problems of high labor intensity, low efficiency and the like in the traditional exploitation operation process are solved.

Inventors

ZHU XUWEI
MA ZENGLIN
YANG YONG
ZHU ZAISI
WU DAFEI
YANG GAO
LI SHUAI
GUO YU
GUO WEI
SHANG BINBIN
ZHANG SHUQING

Assignees

中国石油天然气股份有限公司
中国石油集团工程技术研究院有限公司
中石油江汉机械研究所有限公司
北京石油机械有限公司

Dates

Publication Date: 20260512
Application Date: 20220222

Claims (8)

1. A ball throwing device for sleeve sliding sleeve fracturing is characterized by comprising a fracturing ball throwing device (1), an upper blanking valve (2), a lower blanking valve (3) and a pressure balancing device (4), wherein a lower valve port of the lower blanking valve (3) is connected with a blanking wellhead, the upper blanking valve (2) is positioned above the lower blanking valve (3), the pressure balancing device (4) comprises a balancing bin (41) and a material delivery channel (42), the balancing bin (41) is hermetically assembled between the upper blanking valve (2) and the lower blanking valve (3), the material delivery channel (42) is vertically arranged in the balancing bin (41), the upper end port and the lower end port of the material delivery channel are respectively connected and communicated with the lower valve port of the upper blanking valve (2) and the upper valve port of the lower blanking valve (3), the material delivery channel (42) is provided with an air hole penetrating the inside and the outside of the lower blanking valve (3), a pressure balancing pipeline (5) with a first stop valve (51) communicated with an inner cavity is arranged between the side wall of the balancing bin (41) and the blanking wellhead, the side wall (41) is also provided with a pressure relief mechanism (61) communicated with the pressure relief mechanism (61) arranged in the balancing bin (41) and the pressure relief mechanism (61) and is also provided with a pressure relief mechanism (61), the outlet of the fracturing ball one-by-one throwing device (1) is connected and communicated with the upper valve port of the upper blanking valve (2); The buffering mechanism comprises two buffering valve blocks (71) and two telescopic mechanisms (72), wherein the two buffering valve blocks (71) are respectively arranged at two sides inside the material delivery channel (42) at intervals, the two telescopic mechanisms (72) are respectively arranged outside the two sides of the material delivery channel (42), telescopic ends of the two telescopic mechanisms horizontally penetrate through the side wall of the material delivery channel (42) respectively, one ends of the two telescopic mechanisms, which are in one-to-one correspondence, are connected with one ends, which are mutually far away from the two buffering valve blocks (71), of the two telescopic mechanisms (72) are used for synchronously driving the two buffering valve blocks (71) to relatively move to close so as to cut off the material delivery channel (42) and enable fracturing balls to fall above the two buffering valve blocks, or synchronously driving the two buffering valve blocks (71) to relatively move away so as to enable the fracturing balls to fall through between the two buffering valve blocks; The fracturing balls are put in the device (1) one by one and comprise a putting pipe (11), an installation base plate (12), a rotary driving device (13), a supporting disc (14), a rotary disc (15) and a ball cylinder (16), wherein the putting pipe (11) is vertically arranged, the lower end of the putting pipe is connected and communicated with an upper valve port of the upper blanking valve (2), the installation base plate (12) and the supporting disc (14) are respectively horizontally arranged and sleeved and fixed on the putting pipe (11), the supporting disc (14) is positioned above the installation base plate (12), the height of the upper surface of the supporting disc (14) is not lower than the height of a pipe orifice at the upper end of the putting pipe (11), the rotary driving device (13) is arranged at the upper end of the installation base plate (12), the driving end of the rotary disc passes through the supporting disc (14), the rotary disc (15) is horizontally arranged above the supporting disc (14), the middle part of the lower end of the rotary driving device (13) is connected with the driving end of the rotary driving device (15), a plurality of ball falling holes are formed in a circumferential interval along the circumferential interval, the rotary disc (15) is in a manner, the distance between the rotary disc (14) and the rotary disc (13) is used for the ball falling holes, and the ball falling holes are enabled to move to the upper part of the pipe orifice at the upper end of the throwing pipe (11) in a rotating way one by one.
2. The ball throwing device for casing sliding sleeve fracturing is characterized by further comprising a control system, wherein the control system comprises a controller (9), the first stop valve (51) is an electric control stop valve, the pressure release valve (61) is an electric control pressure release valve, the upper blanking valve (2) and the lower blanking valve (3) are electric control gate valves, and the controller (9) is electrically connected with the first stop valve (51), the pressure release valve (61), the upper blanking valve (2) and the lower blanking valve (3) respectively.
3. The ball throwing device for casing sliding sleeve fracturing according to claim 1, wherein pressure gauges (52) are respectively communicated with pipe sections positioned at two ends of the first stop valve (51) on the pressure balance pipeline (5).
4. The ball throwing device for casing sliding sleeve fracturing according to claim 3, wherein concave areas protruding outwards are respectively arranged on the inner walls of two sides of the material delivery channel (42), and the concave areas are in one-to-one correspondence with the buffer valve blocks (71) and are used for accommodating the buffer valve blocks (71) which relatively move and are far away.
5. A ball injection device for casing sliding sleeve fracturing is characterized in that the telescopic mechanism (72) comprises a circular tubular cylinder (721), a piston (722) and a connecting rod (723) which are horizontally arranged, the cylinder (721) is vertically fixed on the outer side of the material injection channel (42), the piston (722) is assembled in the cylinder (721) in a sealing mode, one end of the connecting rod (723) penetrates through the side wall of the material injection channel (42) and is connected with the corresponding buffering valve block (71), the other end of the connecting rod penetrates through the cylinder (721) to be connected with one end of the material injection channel (42) and is connected with the corresponding end of the piston (722), an elastic piece is arranged between one end of the piston (722) and one end of the cylinder (721) connected with the material injection channel (42), one end side wall of the cylinder (721) far away from the material injection channel (42) is provided with a fluid inlet and outlet communicated with an inner cavity of the end of the piston, one end of the connecting rod is communicated with a filling pipe (8) penetrating through the side wall of the material injection channel (41), and the other end of the piston (721) is provided with a fluid inlet and outlet communicated with a fluid outlet communicated with the inner cavity of the inner cavity, and the fluid cavity.
6. The ball injector for fracturing a sleeve according to claim 5, wherein the elastic member is a spring, is sleeved outside the other end of the connecting rod (723), and has both ends respectively abutted against one end of the piston (722) and one end of the cylinder (721) connected with the material delivery passage (42).
7. The ball injector for fracturing sleeve of any one of claims 1 to 6, wherein a roller assembly (151) in rolling contact with the upper surface of the supporting plate (14) is arranged at the lower end of the rotary plate (15).
8. The ball throwing device for casing sliding sleeve fracturing according to any one of claims 1 to 6, wherein two rotary driving devices (13) and rotary tables (15) are respectively arranged, and are in one-to-one correspondence with each other, the two rotary tables (15) are arranged side by side, arc-shaped notches (152) for allowing edges to pass through in the rotating process of the other rotary table are respectively arranged at the edges of the two rotary tables, at least one notch (152) of the rotary tables (15) is positioned above an upper end pipe orifice of the throwing pipe (11), the two rotary driving devices (13) alternately operate or alternatively operate and drive the corresponding rotary tables (15) to rotate, and in the rotating process, the outer edges of the rotary tables (15) pass through the notches (152) of the other rotary tables (15).

Description

Ball throwing device for sleeve pipe sliding sleeve fracturing Technical Field The invention relates to a staged fracturing process of a horizontal well, in particular to a ball throwing device for sleeve sliding sleeve fracturing. Background The staged fracturing process of the horizontal well is new and optimized for years, and the cost is continuously reduced. The large-scale application of the soluble bridge plug technology saves a great amount of drilling and plugging construction cost for single well staged fracturing. With the continuous perfection of the sleeve sliding sleeve fracturing technology and continuous reduction of cost, a reliable means with simple process, low cost and economic benefit improvement is provided for staged fracturing in the future. The sliding sleeve is opened by adopting a multistage ball-throwing type staged fracturing construction process, in the staged fracturing process, personnel are required to pedal an operating rack, the fracturing balls are manually thrown into a wellhead, and at the moment, the wellhead is required to perform pressure relief operation. After the service personnel leave the operation rack, the service personnel can be subjected to fracturing, the service process is complex, discontinuous, time-consuming and labor-consuming, and the safety is poor. Compared with the traditional ball throwing mode, the full-automatic wellhead ball throwing system has great advantages. The automatic ball throwing device of the patent disclosed at present is mainly used for a limited-level sleeve sliding sleeve fracturing ball, such as a Chinese patent CN 201710493192.8, a ratchet wheel is arranged at the center of a rotary table, a hole for placing a steel ball is formed in the rotary table around the ratchet wheel, the rotary table can align the hole with a guide tube through rotation, and the steel ball falls down after passing through the guide tube. Like chinese patent CN202010892335.4, the ball throwing assembly comprises a ball separating rotary cylinder, a rotary cylinder shield, a ratchet wheel, a shifting needle, a driving device and a non-return pawl, when in operation, the working end of the driving device stretches once, the shifting needle cooperates with the non-return pawl to push the ratchet wheel to rotate, the ratchet wheel drives the ball separating rotary cylinder to rotate, and the rotating angle is the angle between the axes of two adjacent ball separating grooves. The automatic ball throwing device provided by the prior art cannot meet the ball throwing requirement of an infinite-level sleeve sliding sleeve fracturing process, most tools for opening a fracturing sliding sleeve well sealing and isolating lower layer in the process are irregular spheres or cylinders, and corresponding ball throwing devices are lacking at present. Disclosure of Invention The invention aims to solve the technical problem of providing a ball throwing device for sleeve sliding sleeve fracturing, which effectively overcomes the defects of the prior art. The technical scheme for solving the technical problems is as follows: The utility model provides a sleeve pipe sliding sleeve is ball throwing device for fracturing, including fracturing ball throw in one by one the device, go up the blanking valve, lower blanking valve and pressure balancing device, the blanking well head is connected to the lower valve port of above-mentioned blanking valve down, above-mentioned last blanking valve is located the top of above-mentioned blanking valve down, above-mentioned pressure balancing device includes balanced storehouse and material delivery passageway, above-mentioned balanced storehouse seal assembly is between above-mentioned blanking valve and lower blanking valve, above-mentioned material delivery passageway is vertical to be set up in above-mentioned balanced storehouse, its upper and lower end port is connected and communicates with the lower valve port of above-mentioned last blanking valve and the last valve port of lower blanking valve respectively, be equipped with the gas pocket that link up its inside and outside on the above-mentioned material delivery passageway, be equipped with the pressure balance pipeline that has a stop valve of intercommunication two inner chambers between above-mentioned balanced storehouse lateral wall and the blanking well head, still be equipped with the pressure release pipeline that has the pressure release valve in it, be equipped with the buffer gear that is used for stopping or releasing fracturing ball on the above-mentioned material delivery passageway, the export of above-mentioned ball throwing device is connected and communicates with the last valve port of above-mentioned blanking valve one by one. On the basis of the technical scheme, the invention can be improved as follows. Further, the automatic blanking device further comprises a control system, wherein the control system comprises a controller, the first stop valve is