42 results about "Single slip" patented technology

The invention discloses a single-slips fully-soluble bridge plug. The single-slips fully-soluble bridge plug comprises a central pipe, a fracturing ball, a sliding sleeve, a rubber cylinder, a backband, a locking ring backband, a locking ring, a cone, a slips and a guiding shoe, wherein the central pipe is an axial hollow structure, the upper end of the central pipe is provided with an insertion pipe connected with exterior and a plurality of uniformly distributed shearing pins, the inner upper end of the central pipe is provided with a variable-diameter cavity for holding the fracturing ball,the conicity of a cross section of the variable-diameter cavity is 20 to 30 degrees, the fracturing ball is a soluble fracturing ball, the sliding sleeve and the backband are arranged outside the central pipe, the rubber cylinder is arranged outside the sliding sleeve in a sleeving manner and positioned between the sliding sleeve and the backband, and the locking ring is arranged between the sliding sleeve and the locking ring backband. The bridge plug does not need the drilling polishing, the bridge plug can be completely dissolved by utilizing a solution containing electrolyte and discharged from the bottom layer, and then the solution with the dissolved bridge plug can flow out a full bore of a shaft to be used in the subsequent production.

The invention relates to the field of geotechnical engineering slope stability evaluation and prevention and treatment, in particular to a method for determining benching non-circular slip surfaces by displacement monitoring. The method includes: (1) surveying and mapping feature positions and parameters of a slope slip surface; (2) setting monitoring points of main slip surface displacement of a slope; (3) collecting and processing slope displacement monitoring data; (4) drawing a profile map of a slope main axis; (5) determining a slip mass distribution circle center and a slip surface position; and (6) drawing a complete main axis slip plane position. The method has the advantages that an initial slip surface needs not to be supposed, feature points that the slip surface passes in advance need not to be set, the slope slip surface is determined comprehensively just according to observation point displacement vector data, rear edge cracked wall position and shape and front edge shear opening position information, and determination of the slip surface position of a slip mass is no longer limited to a single slip circle and a circle center.

The invention discloses a large-diameter composite bridge plug which comprises a setting pull rod, an upper cone, a central pipe, a lower cone, a rubber cylinder assembly, a one-way integral slip, a guiding shoe head and a soluble fracturing ball. The upper cone, the central pipe, the lower cone and the guiding shoe head are sequentially mounted on the setting pull rod in a sleeving mode, the upper cone is connected with one end of the central pipe, and the end, close to the threaded end of the setting pull rod, of the upper cone is provided with an inward-sunken conical face matched with thesoluble fracturing ball; the end, connected with the central pipe, of the upper cone is in a conical shape, the lower cone is connected with one end of the central pipe through a thread, the other endof the lower cone is connected with one end of the guiding shoe head, and the central pipe is sleeved with the position between the upper cone and the lower cone, wherein the position is provided with the rubber cylinder assembly; and the guiding shoe head is provided with an abutting part, and the one-way integral slip is arranged between the lower cone and the abutting part of the guiding shoehead. According to the large-diameter composite bridge plug, drilling grinding is not needed, and the soluble fracturing ball is completely dissolved to provide an oil and gas production channel for awellbore.

The invention relates to a soluble bridge plug for petroleum and natural gas exploitation, comprising a mandrel, a soluble ball, a guide shoe fixedly mounted at the bottom of the mandrel, and a seal system, an anchor system and a push ring sleeving the mandrel; the seal system comprises a glue barrel, upper and lower cones identical in structure and mounted at two ends of the glue barrel, and a protective ring assembly; the anchor system comprises upper and lower slip assemblies identical in structure and mirror-symmetrically mounted on outer conical surfaces of the upper and lower cones; the upper and lower slip assemblies each comprise a single slip and a slip hoop clamped to the single slip; at least one ceramic particle is embedded in the outer wall of each single slip, the outer surface of the ceramic particles is higher than the outer walls of the single slips, the raised portions of the ceramic particles are of slant structure, the lowest points of slants are flush with the outer walls of the single slips or lower than the outer walls of the single slips. Since soluble metal materials and / or degradable technologies are employed, the soluble bridge plug is short of a grinding milling step, takes less operating time and provides better protection for an oil-gas reservoir when compared to a traditional fracturing bridge plug.

The invention discloses a degradable alloy and application of the degradable alloy serving as a single-slip-type soluble bridge plug. The degradable alloy comprises the following components of 60-75%of Zn, 5-15% of Mg, 5-10% of Na, 1-5% of Fe, 0.1-0.5% of C, 0.5-2% of Si, 0.5-2% of Ni and inevitable impurities, wherein the sum of mass fractions of all the components is 100%. The degradable alloyis utilized to manufacture a tool for fracturing construction, the tool is automatically melted in a pit after completing a work task and can be completely degraded, the problems of liable clamping and plugging of a channel do not exist, the degrading time is controllable, and the sealing property and pressure-bearing property are excellent.

The invention relates to petroleum drilling exploitation equipment, in particular to a single-slip large diameter bridge plug comprising an upper connector, a one-way gear whole slip, a central pipe, a rubber cylinder, a conic body and a guiding shoe. The central pipe is of an axial hollow structure, and the outer wall of the central pipe is sleeved with the rubber cylinder. The cross section of the bottom of the conic body is conic, and the conic body is wedged into a gap between the one-way gear whole slip and the central pipe. An inner cavity of the upper portion of the central pipe is provided with a variable-diameter cavity for placing a soluble ball. The inner diameter of the variable-diameter cavity is decreased from top to bottom. Four grooves are uniformly formed in the lower end of the central pipe. Bosses matched with the grooves are arranged inside the one-way gear whole slip in the circumferential direction and inside the lower end of the guiding shoe in the circumferential direction. The soluble ball can be dissolved in an electrolyte solution. Meanwhile the invention discloses a setting method of the single-slip large diameter bridge plug. Drilling-grinding is not needed, and the soluble ball can be fully dissolved only by injecting the electrolyte solution, so that the large diameter of the bridge plug is reserved for using in subsequent production.

The sheet-fed conveyor drum (9) comprises a first (11) and second (12) comb segment. Gaps (15) between the teeth (14) of the comb segments are covered by at least one covering sheet (19) which is pneumatically operated and inflatable in the form of a tube, bellow or balloon. A turning arrangement incorporates a sheet-fed conveyor drum as turning drum.

The invention discloses a fluorescent molecular tomography device and method based on a single slip ring and wireless control exciting light scanning and belongs to the field of fluorescent molecular tomography technologies. The device comprises a slip ring power supply module, a wireless control exciting light scanning module, a rotation mirror module, an optical acquisition module and a push-pull type objective table module. Laser beams emitted from a laser tube in the exciting light scanning module enters a two-dimensional scanning galvanometer, and the two-dimensional scanning galvanometer deflects and reflects the laser beams under the control of a wireless data transmission module and enables the laser beams to be directly projected to an imaged object on an objective table. Fluorescent light excited by the imaged object passes through a reflective light path of the rotation mirror module, enters the optical acquisition module and is collected by the optical acquisition module. Through the wireless control exciting light scanning mode, control signal lines are omitted, so the problem that the signal lines are twined due to rotation does not exist, the usage frequency of the slip ring is reduced, the design complexity of the system is reduced, and the size of the system is decreased.

A frac plug having a mandrel body, a cap coupled to an upper end of the mandrel body and an outer housing coupled to a lower end of the mandrel body. A guide shoe is coupled to the outer housing. A single slip assembly is positioned between the cap and the guide shoe and surrounds the mandrel body. A sealing element is positioned between the cap and the single slip assembly and surrounds the mandrel body.

The invention relates to a single-slip oil layer perforation sealing pipe string which mainly solves the problems that when the pipe strings of the prior art complete the chemical sealing and plugging operation construction to oil and water wells, because the pipe strings do not have the functions of positive stamping setting, rotation and sealing the injection hole, reverse stamping, deblocking by lifting, etc., the working efficiency is low. The pipe string is characterized in that the pipe string consists of a super packer, a medium packer and a subordinate packer connected with oil pipes; the pipe string actually meets the technical requirements of each procedure in the sealing and plugging operation under different pressure on the sliding bush of an underground packer by cooperating with different motions, such as rotation and lifting, wherein, the super and the medium packers have the functions of positive stamping setting and reverse stamping setting, and the subordinate packer has the functions of positive stamping setting, injection hole sleeve rotation and sealing, and reverse stamping setting. The pipe string is characterized by great improvement of the working efficiency of the oil and water well chemical sealing and plugging operation construction.

The invention discloses a corrosive agent for displaying slip band tissue of a shot blasting layer and a preparing method thereof. Each 100 mL of a corrosive agent solution contains 35-70 mL of H2O, 12-35 mL of hydrochloric acid, 25-55 g of FeCl3.6H2O, 1-4 g of CuCl2.H2O, 4-15 mL of nitric acid, 1-10 drops of hydrogen peroxide and 1-5 mL of bromo-geramine. According to the preparing method, distilled water is added into a beaker, and then FeCl3.6H2O and CuCl2.H2O are sequentially added and fully stirred to be dissolved uniformly; hydrochloric acid is added and stirred uniformly, then nitric acid and bromo-geramine are added, and finally hydrogen peroxide is dripped and mixed uniformly. The corrosive agent for the tissue of the shot blasting layer of the austenitic stainless steel inner wall can clearly display the tissue of the austenitic stainless steel shot blasting layer, and an optical microscope can identify the shot blasting layer of the inner wall easily under 200 folds; the form of a fragmentation layer, a crossing slip layer and a single slip layer of the shot blasting layer can be identified under 500 folds.

A sheet feed device according to the present invention applied to a sheet processing machine is to extract paper sheets from a stack based on the principle of front edge separation. In order to improve the controllability for sheet separation of an extracting device at the stack 1 and transportation of the sheets, drive devices are provided separately for dual suction devices 2 and 6 led mutually about the mating parties in the sheet cycles. Therefore, the dual suction devices 2 and 6 are equipped with linear motors 12 and 15 to make lifting and linear motors 5 and 9 for the transporting movement. By this profitable method, the moving cycles can be established independently for the respective dual suction devices 2 and 6.

The invention relates to a composite slip-increasing masterbatch for BOPP films, which is mainly used for BOPP films. A variety of slip agents are preferred in the present invention, and a composite formula is adopted to design a compound type slip enhancement masterbatch. It combines the advantages of various slip agents and is used in BOPP film, which has both optical properties and slip effects of the film, and avoids the disadvantages of using a single slip agent. The technology belongs to the field of functional polymer materials.

The invention discloses a full-metal single-slip soluble large-drift-diameter bridge plug. The full-metal single-slip soluble large-drift-diameter bridge plug comprises an adaptor. The full-metal single-slip soluble large-drift-diameter bridge plug is characterized in that the adapter (1) is connected to one end of the bridge plug and penetrates through a central pipe; the bridge plug comprises apush ring (2), a slip (3), a cone (4), a first clamp ring (5), a second clamp ring (6), a joint (8), a fixing wire (9), a center pipe (10), a shear nail (11), a left hoop ring (12) and a right hoop ring (13); the shear nail (11) is connected with the adapter (1) and a central pipe (10); and the fixing wire (9) fixes the joint (8) and the central pipe (10). The full-metal single-slip soluble large-drift-diameter bridge plug has the advantages of convenient and simplified construction process, simple structure, small volume, intelligent water dissolution, cost saving, precise positioning, prevention of setting in advance, safety and high quality performance. The invention is mainly used for oil and gas well exploitation, in particular to the full-metal single-slip soluble large-drift-diameter bridge plug for horizontal wells and vertical wells.

The invention discloses a two-dimensional code and industrial robot based bill binding system. The two-dimensional code and industrial robot based bill binding system comprises a feeding subsystem, aclassification subsystem, an industrial robot, a binding subsystem and a central control subsystem; and the central control subsystem drives the classification subsystem and the industrial robot to place the single bill with the category attribute identified into a corresponding bill containing bin according to a received classification control signal correspondingly, and drives the industrial robot and the binding subsystem to cooperate to complete the binding operation of the bill meeting the binding condition in a successful matching groove according to a received binding control signal todeliver the bound bill to a finished product stacking platform. According to the two-dimensional code and industrial robot based bill binding system, manual circulation of the physical bill can be reduced, the risk of bill missing and damage caused in the manual circulation link of the paper bill is effectively avoided, and the full-process production efficiency of bill management is improved.

The invention discloses a plane flat-pressing type high-load-bearing bearing chain. The plane flat-pressing type high-load-bearing bearing chain comprises a chain body formed by a plurality of chain units through a connection plate hinge; each chain unit comprises an n-shaped inner buckle plate formed in a compression molding manner; the upper top face of each n-shaped inner buckle plate is a load-bearing conveying face; the front end and the rear end of standing plates on the two sides of each n-shaped inner buckle plate are symmetrically provided with pin holes; a pin shaft arranged between the pin holes of the front end and the rear end of the standing plates on the two sides of each n-shaped inner buckle plate in a penetrating and sleeved manner is sleeved with left and right load-bearing bearings; and a chain wheel rotating shaft sleeve is arranged between the corresponding left and right load-bearing bearings. The plane flat-pressing type high-load-bearing bearing chain has the beneficial effects of being ingenious and reasonable in structure, high in load bearing capacity and small in resistance. The plane flat-pressing type high-load-bearing bearing chain is used in cooperation with a matched conveying track and can completely meet the high-load-bearing accurate transferring requirement of a super-high weight object (paper pile) of a sheet-fed offset press.

The invention relates to a full-servo high-speed precise single-piece transverse cutting machine. The full-servo high-speed precise single-piece transverse cutting machine comprises a rack and furthercomprises a control device, an unwinding mechanism, an electric eye, a cutting device and a conveying device which are fixed to the rack. The control device comprises a control system, control buttons and a touch screen. The unwinding mechanism comprises an air expanding shaft, a conveying table, a flattening idler wheel arranged on the conveying table, and a plurality of conveying rollers and isused for unwinding and conveying a reel printed object to the cutting device. The electric eye is arranged on the front portion of the cutting device and used for positioning before cutting. The cutting device comprises a cutter and is used for cutting the printed object. The conveying device comprises a transmission shaft and a conveying belt and is used for conveying the cut printed object. According to the full-servo high-speed precise single-piece transverse cutting machine, the high-speed precise single-piece transverse cutting problem of the reel printed object is solved, the technological blank is filled, waste is avoided, the production efficiency is improved, economic benefits are increased, the production cost is lowered, and raw materials are saved.

The single-sheet picking device (10) comprises: a base frame (20) arranged near a stacking area (TA) and extending in the vertical direction; a separation unit (26) which separates the top workpiece (W) from a plurality of workpieces (W) stacked in the stacking area (TA) by using at least one of the jet pressure and the suction force of air; and a balancer (52) which reduces the weight acting on the separation unit (26). The separation unit (26) is arranged on the base frame (20) so as to be able to be raised and lowered. The separation unit (26) has an abutting part (32) that abuts against the surface of the top workpiece (W). The separation unit (26) is configured to rise following the lifting action of the workpiece suction part (18) when the workpiece suction part (18) sucks the workpiece (W) from the surface of the top workpiece (W) and lifts the workpiece (W), and retreat from above the stacking area (TA).

The invention discloses a conveying belt system in a Tetra Fino Aseptic fresh milk packaging machine. A connecting shaft comprises a heat dissipation disc, a connecting shaft shell, a reflux coil pipe, twelve or more outflow straight pipes, a water inlet distributor, a connecting shaft water outlet pipe and a connecting shaft water inlet pipe. The connecting shaft water inlet pipe is arranged on one side of the connecting shaft shell. One end of the connecting shaft water inlet pipe is connected with an external water inlet device. The other end of the connecting shaft water inlet pipe is connected with the water inlet distributor in a communicating mode. The water inlet distributor is located in the connecting shaft shell. The outflow straight pipes are arranged on the right side of the water inlet distributor and connected with the water inlet distributor in a communicating mode. All the outflow straight pipes form an outflow straight pipe set. The conveying belt system in the TetraFino Aseptic fresh milk packaging machine is simple in structure, high in logistics efficiency, low in cost and long in working life of a conveying belt; and the conveying belt system adopts a curve structure, the defects of a single slip path in the past are avoided, and slip is not likely to occur.

The tempered film taking method comprises the steps that S1, preparation work is conducted, specifically, a tempered film containing tool, a lifting shaft fixing structure, a lifting structure installed on the lifting shaft fixing structure and a vacuum suction cup type taking structure fixedly connected with the lifting structure at a preset inclination angle alpha are provided, and the taking structure is divided into an A-B area, a B-C area and a C-D area, the material taking structure is integrally formed by adopting a material with both toughness and strength, and a plurality of tempered film main bodies are stacked on the placing tool; s2, segmented adsorption: controlling a lifting structure to drive the material taking structure to descend at a constant speed at a preset speed, so that suckers in a C-D area of the material taking structure sequentially adsorb the uppermost tempered film main body. According to the method, single-piece accurate material distribution can be achieved, the electrostatic adhesion influence is eliminated, and therefore the material distribution efficiency and accuracy are improved.

The invention relates to a substrate feeder (100) having at least two acceleration mechanisms (136), which are arranged next to each other and below a storage area (134), the substrate feeder having a frame (162) and At least one lifting frame (166; 173; 174) movable relative to the frame, the acceleration mechanism (136) is movably arranged jointly with each other and with the lifting frame (166; 173; 174), the acceleration mechanism (136) Each of them has at least one rotating body (163; 187), the rotating bodies are respectively driven by a common shaft (169), the common shaft has at least two shaft segments (171), and the shaft segments are relative to each other in the transverse direction (A) Arranged one behind the other, directly adjacent shaft sections (171) are each arranged connected via a coupling piece (172), a structural assembly is arranged, which each has a steering mechanism (163), a shaft section (171) and at least one conveyor belt (136), and are respectively fixed on the lifting frame (166; 173; 174) and / or are arranged to be able to move together with the lifting frame and are connected to each other with the lifting frame in such a way that the shaft segments (171) of the structural components are connected by The member (172) is connected to a common shaft (169), and the invention relates to a sheet-fed converting machine (01).

The invention discloses a novel single-slip longitudinal and transverse all-in-one machine control system, which comprises a PLC (programmable logic controller), wherein the input end of the PLC is electrically connected with a power supply and the output end of a coder respectively; the output end of the PLC is electrically connected with a proximity switch, a steam heating system, an air compression system, an operation monitoring display screen and a frequency converter respectively; the output end of the frequency converter is electrically connected with the input end of a brake driving module; the output end of the brake driving module is electrically connected with the input end of a counter; the output end of the counter is electrically connected with the input end of the PLC; through the control of the frequency converter on the brake driving module, the requirements on single-slip paper with different lengths can be met, so that the problem of complicated work of paper connecting, counting, beating aligning, stacking and the like can be solved; the rejection rate is reduced; the production efficiency is improved; workers can intuitively know the current work conditions through operating the monitoring display screen; the next step of operation is convenient.

Method for operating a sheet separator (01) for separating sheets of a substrate (02) stacked in a feeder of a sheet-fed printing press, wherein at least one separating suction cup (08) and at least one front transport suction cup (09) and at least one rear transport suction cup (11) are provided in the transport direction (T) of the sheets, wherein a control unit (18) controls the application of a compressed air source generating a vacuum to the transport suction cups (09; 11), wherein the control unit (18) controls the at least one front transport suction cup (09) by means of a first control element (16) and the at least one rear transport suction cup (11) by means of a second control element (17) separate from the first control element (16), wherein the first control element (16) and the second control element (17) are each designed as control cams (16; 17).wherein the at least one separating suction cup (08) is activated with reference to the first control cam (16) at a first control angle and grasps the sheet lying on top of the stack for the injection of loosening air, wherein the at least one front transport suction cup (09) and the at least one rear transport suction cup (09) are each in their respective starting position with reference to the first control cam (16) at a second control angle that is larger than the first control angle and thus the sheets are each in their rearmost position in the transport direction (T), wherein the at least one rear transport suction cup (11) is activated by means of the second control cam (17) at the second control angle referred to the first control cam (16), while the at least one front transport suction cup (09) is switched with the first control cam (16) and waits for its activation,until the currently gripped sheet has passed the previously fixed position of the at least one front transport suction cup (09) with reference to the sheet separator (01), and wherein the at least one front transport suction cup (09) is activated with the first control cam (16) only at a larger third control angle, which is different from the second control angle and is referenced to the first control cam (16).

A sheet feed device according to the present invention applied to a sheet processing machine is to extract paper sheets from a stack based on the principle of front edge separation. In order to improve the controllability for sheet separation of an extracting device at the stack 1 and transportation of the sheets, drive devices are provided separately for dual suction devices 2 and 6 led mutually about the mating parties in the sheet cycles. Therefore, the dual suction devices 2 and 6 are equipped with linear motors 12 and 15 to make lifting and linear motors 5 and 9 for the transporting movement. By this profitable method, the moving cycles can be established independently for the respective dual suction devices 2 and 6.

To easily fold a sheet material from one rectangular sheet material, to position and store a plurality of sheets in a flatly folded state when not in use, and to stably secure a three dimensional boat-shaped storage space when in use.SOLUTION: The folding boat-shaped container 1 has a predetermined basic fold in one rectangular sheet material S, and a container body 2 is composed of a bottom part 3 and a side peripheral part 4 surrounding the peripheral edge of the bottom part 3. The bottom portion 3 is foldable, and the side peripheral portion 4 includes a single-sheet outer shape body portion side L3 provided facing the symmetrical parallel line fold side 4a of the bottom portion 3, a multi-sheet stacked reinforcing body portion side L4 provided facing the V-shaped fold side 4b of the bottom portion 3, and a holding portion side 4a that holds a part of the reinforcing body portion side 4b protruding from the outer shape body portion side 4a by folding the part of the reinforcing body portion side 4c into opening edges on both sides in a longitudinal direction of the outer shape body portion side wall, the container body 2 can be deformed into a flat first shape as a shape at the time of non-use and a second shape for securing a boat-shaped housing space part 5 as a shape at the time of use.SELECTED DRAWING: Figure 1

The present invention aims at an improved apparatus for introducing sheet smoothly into printing unit even in case thickness of sheet is changed without any adjustment. The present invention premises a sheet-fed printing press whose sheet transfer path for a plurality of printing units (10) in modular fashion is composed of double-sized transfer and impression cylinders. The apparatus for introducing sheet into said sheet-fed printing press comprises a first double-sized transfer cylinder (30) whose center of rotation is above the transfer path of sheet (24) and has, in succession with gripper means (40) on its circumference, curved guide member (42) which can be depressed in radial direction of the cylinder; a second transfer cylinder (32) of approximately the same construction with said double-sized impression cylinder (18) and is in contact with the lower portion of said first transfer cylinder (30) and said transfer cylinder (20) of said first printing unit (10a).

The invention discloses an automatic circular testing machine tool for a paper currency receiving machine. The automatic circular testing machine tool comprises a machine body, wherein the machine body is provided with a paper currency receiving hole, a paper currency storing cabin, a single paper currency twisting device, a paper current conveying mechanism and a paper currency conveying hole, wherein the paper currency receiving hole is used for receiving a paper currency rejected from a paper currency rejecting hole of the paper currency receiving machine and conveying the paper currency to the top of piled paper currencies in the paper currency storing cabin; the single paper currency twisting device is used for twisting a single paper currency away from the bottom of the piled paper currencies in the paper currency storing cabin and conveying the paper currency into the paper currency conveying mechanism; the paper currency conveying mechanism is used for conveying the paper currencies to the paper currency conveying hole; the paper currency conveying hole is used for conveying the paper currency into the paper currency receiving hole of the paper currency receiving machine. By adopting the automatic circular testing machine tool, paper currency receiving, authentication, rejection and the like can be finished automatically, manual work is replaced, a large amount of simple and repeated manual work is avoided, and the working efficiency is increased.

The invention relates to a single-slips double-acting non-cyclical setting whipstock hanging tool which is used for fixing a whipstock during window sidetracking in casings of oil and gas wells. The technical scheme of the invention is as follows: an upper connector, an upper cylinder body and a lower cylinder body are connected in sequence by threads; a stop screw for positioning is arranged between the upper cylinder body and the lower cylinder body; a limit gear is connected with a piston and a lower connector sequentially by using threads, the limit gear is connected with the piston and the piston is connected with the lower connector respectively by using two shear pins; a filtering net is arranged at an setting channel port of the upper connector, the anti-blocking slide sleeve is suspended at the lower port of the piston, and a steel ball is arranged in the lower connector; four slips bodies are symmetrically arranged on a T-shaped channel on the inclined surface of the piston, and the slips bodies are embedded with hard alloy teeth; and the upper cylinder body is connected with the limit gear through a unidirectional gear buckle. The hanging tool has the advantages of simpleness in operation, setting reliability, short construction period and reduced accident rate under the shaft; and the single-slips double-acting non-cyclical setting whipstock hanging tool disclosed by the invention is capable of finishing the setting hanging under the pump pressure of 20-25MPa, can bear 30T axial setting force and is used for window sidetracking in the well drilling operation.

The invention relates to the field of geotechnical engineering slope stability evaluation and prevention and treatment, in particular to a method for determining benching non-circular slip surfaces by displacement monitoring. The method includes: (1) surveying and mapping feature positions and parameters of a slope slip surface; (2) setting monitoring points of main slip surface displacement of a slope; (3) collecting and processing slope displacement monitoring data; (4) drawing a profile map of a slope main axis; (5) determining a slip mass distribution circle center and a slip surface position; and (6) drawing a complete main axis slip plane position. The method has the advantages that an initial slip surface needs not to be supposed, feature points that the slip surface passes in advance need not to be set, the slope slip surface is determined comprehensively just according to observation point displacement vector data, rear edge cracked wall position and shape and front edge shear opening position information, and determination of the slip surface position of a slip mass is no longer limited to a single slip circle and a circle center.