CN113464392B

CN113464392B - High-power five-cylinder drilling pump, drilling pump set, solid control system and drilling machine

Info

Publication number: CN113464392B
Application number: CN202110728074.7A
Authority: CN
Inventors: 张芳芳; 程建; 代俊; 蒲宗珉; 唐明鹏; 曾慧
Original assignee: Sichuan Honghua Petroleum Equipment Co Ltd
Current assignee: Sichuan Honghua Petroleum Equipment Co Ltd
Priority date: 2021-06-29
Filing date: 2021-06-29
Publication date: 2023-06-16
Anticipated expiration: 2041-06-29
Also published as: CN113464392A

Abstract

The invention discloses a high-power five-cylinder drilling pump, a drilling pump set, a solid control system and a drilling machine, belonging to the technical field of oilfield drilling construction operation equipment; the device comprises a transmission assembly, a power end assembly and a hydraulic end assembly, wherein the transmission assembly is assembled and connected with the power end assembly, the power end assembly is connected with the hydraulic end assembly, and the traditional assembly provides power and drives the hydraulic end assembly to work through the power end assembly; the high-power five-cylinder drilling pump and the drilling pump set realize modularized design on the design of the whole structure, can effectively solve the problem of larger structure of the traditional drilling pump or the drilling pump set on the spatial layout of the structure, and solve the problem of complex structure caused by an intermediate mechanical variable speed transmission mechanism such as belt transmission, chain transmission and the like on the basis of the traditional structural design, thereby effectively realizing the optimization effect of the whole structure.

Description

High-power five-cylinder drilling pump, drilling pump set, solid control system and drilling machine

Technical Field

The invention relates to a high-power five-cylinder drilling pump, a drilling pump set, a solid control system and a drilling machine, and belongs to the technical field of oilfield drilling construction operation equipment.

Background

With the development of novel drilling technology such as deep wells/ultra-deep wells, high-pressure jet drilling, large-displacement horizontal wells, cluster wells, ocean platforms and the like, drilling pumps are required to develop in the directions of high power, high discharge capacity, high pump pressure, high reliability and light weight. At present, the conventional transmission modes such as belt transmission, chain transmission or gear transmission are generally adopted between a drilling pump body and a driving motor, and the defects of mechanical loss in the transmission process are overcome, so that the transmission efficiency and the working reliability are reduced; secondly, the operation and maintenance workload is large, and the use cost is high; thirdly, the drilling pump and the VFD house are large in volume and weight, and are inconvenient to move quickly. It is difficult to accommodate the increasingly high drilling process specifications. Aiming at the construction condition, the oil field hopes to design and manufacture a drilling pump with small occupied area, light weight, high efficiency and high power so as to solve the production problem of the oil field.

Disclosure of Invention

The invention aims at: aiming at the problems, the device provides a high-power five-cylinder drilling pump and a drilling pump set, and the device has a simple structure, is more compact than the traditional structure, and simultaneously, the working efficiency is also effectively improved.

The technical scheme adopted by the invention is as follows:

the high-power five-cylinder drilling pump comprises a transmission assembly, a power end assembly and a hydraulic end assembly, wherein the transmission assembly is assembled and connected with the power end assembly, the power end assembly is connected with the hydraulic end assembly, the traditional assembly provides power, and the hydraulic end assembly is driven to work through the power end assembly;

the transmission assembly comprises a motor module, a transmission mechanism and a crank connecting rod mechanism, wherein the motor module is connected and assembled with the crank connecting rod mechanism through the transmission mechanism, and the motor module is used for realizing the movement of the crank connecting rod mechanism;

the power end assembly comprises a plurality of power units, each power unit is assembled and connected with the crank connecting rod mechanism, the other end parts of the power units are respectively and independently assembled with a piston mechanism of the hydraulic end assembly, and the hydraulic end assembly is driven by the power end assembly.

Further, the transmission assembly comprises a frame, a motor module is arranged on the frame, the transmission mechanism comprises a driving wheel arranged on the motor module and a driven wheel used for driving a crank-link mechanism, the crank mechanism comprises a crankshaft, the crankshaft is provided with the driven wheel, and a plurality of support bearings and a plurality of connecting rods are assembled on the crankshaft.

Further, driving wheels are arranged on two sides of the frame, driven wheels are arranged on two end portions of the crankshaft, the motor module controls 2 driving wheels to synchronously rotate, and the driving wheels are matched with the driven wheels to realize rotation of the crankshaft.

Further, the motor module both sides are provided with the axis of rotation, the both ends fixed mounting of axis of rotation has the action wheel.

Furthermore, the driving wheel is fixedly assembled on the rotating shaft, so that the driving wheel and the rotating shaft synchronously rotate.

Further, the driving wheel is fixedly assembled on the rotating shaft through key connection.

Further, the action wheel is assembled on the axis of rotation through interference fit's mode, the action wheel has the toper hole, and the tip of axis of rotation is the toper post to realize the assembly of toper hole and toper post through interference fit, so that the dismantlement of action wheel.

Further, the driving wheel is assembled on the rotating shaft in an interference fit mode, the driving wheel is provided with a cylindrical inner hole, the end part of the rotating shaft is a circular column, and the assembly of the cylindrical inner hole and the circular column is realized through the interference fit.

Further, the rotating shaft is of an integral structure, or the rotating shaft is of a split structure, and synchronous rotation is achieved under the action of the motor module.

Further, the crankshaft is provided with a plurality of crank throws, the crankshaft is fixedly assembled on the frame through a plurality of support bearings, the crank throws are positioned between two adjacent support bearings, and connecting rods are assembled on the crank throws.

Further, the number of the support bearings is 6, and the number of the bell cranks is 5.

Furthermore, the driving wheel and the driven wheel are driven by adopting a bevel gear meshing or a straight gear meshing mode.

Further, the diameter of the driving wheel is smaller than that of the driven wheel so as to achieve a speed reduction effect.

Further, the motor module is overhead.

Further, the motor module is a permanent magnet integrated motor.

Further, the motor module is an alternating current variable frequency motor.

Further, the power end assembly comprises a cross head box body, the cross head box body is provided with a plurality of cross head cavities used for assembling a cross head structure, the crank connecting rod mechanism is provided with a plurality of connecting rods, each connecting rod is connected with the corresponding cross head structure for assembly, and the cross head structure can realize linear reciprocating motion under the acting force of the connecting rods.

Further, the crosshead box is also provided with a box cover plate for covering the crosshead chamber.

Further, the box cover plate is of an integrated structure.

Further, the box cover plate is of a split structure, the box cover plate comprises a plurality of cover plate units, and each cross head chamber is provided with one cover plate unit, so that the equipment maintenance efficiency is improved.

Further, the front end of the cross head box body is provided with a crank case for assembling a crank connecting rod mechanism, a motor base is arranged above the crank case, bearing seats for assembling a motor rotating shaft are arranged on two sides of the motor base, a cylinder cavity is formed in the end portion of the cross head box body for assembling the hydraulic end assembly, and a front wall plate is arranged at the end portion of the cylinder cavity for connecting the hydraulic end assembly.

Further, the hydraulic end assembly comprises a liquid suction module, a liquid discharge module and a piston mechanism connected with the power end assembly, and the suction and discharge of liquid are controlled through the movement of the piston mechanism;

the liquid suction module sucks liquid in a state where the piston mechanism is contracted, and the liquid discharge module discharges liquid in a state where the piston mechanism is advanced.

Further, the hydraulic end assembly comprises a hydraulic end frame, the piston mechanism comprises a piston cylinder assembled on the hydraulic end frame, a piston rod arranged in the piston cylinder and a piston head arranged at the end part of the piston rod, and the other end of the piston rod is assembled with the power end assembly to realize the operation of the piston mechanism.

Further, the end portion of the power end assembly for assembling the hydraulic end assembly is provided with a cylinder chamber, and the end portion of the cylinder chamber is provided with a front wall plate for connecting the hydraulic end assembly.

Further, the piston mechanism may be mounted within the cylinder chamber to facilitate assembly of the piston mechanism with the power end assembly.

Further, the hydraulic end frame is assembled with the front wall plate through bolts so as to realize the assembly of the integral device.

Furthermore, the piston cylinder is assembled on the hydraulic end frame through a plurality of cylinder sleeve bolts, and the piston cylinder is further provided with a pressing plate, and the cylinder sleeve bolts penetrate through the pressing plate and are combined on the hydraulic end frame.

Further, the front end of clamp plate is provided with the gland locking dish, the gland locking dish passes through cylinder liner nut realization location the rear end of gland locking dish is provided with cylinder liner nut and is used for laminating with the clamp plate in order to realize the location, is provided with cylinder liner nut in order to realize that the gland locking dish is located between two cylinder liner nuts at the front end of gland locking dish.

Further, a cylinder sleeve disc withdrawing mechanism is arranged at the rear end of the pressing plate, the cylinder sleeve disc withdrawing mechanism comprises a positioning pin shaft fixed on the outer side of the piston cylinder and a cylinder sleeve disc withdrawing disc, the cylinder sleeve disc withdrawing disc can axially move along a cylinder sleeve bolt, a cylinder sleeve nut is further arranged at the end part of the cylinder sleeve disc withdrawing disc, a limiting block is arranged on the piston cylinder, the front end of the cylinder sleeve nut is assembled with the limiting block in a fitting way, and the cylinder sleeve disc withdrawing disc is fixedly connected with the positioning pin shaft in a fitting way;

when the cylinder sleeve is disassembled, the cylinder sleeve nut at the front end of the pressing plate is led to withdraw a certain distance or disassembled, and the cylinder sleeve nut at the rear end of the cylinder sleeve withdrawing disc is screwed to withdraw the piston cylinder.

Further, the liquid suction module comprises a suction pipe orifice, a valve assembly and a suction cavity, and under the action of the piston mechanism, the opening/closing of the valve assembly is controlled to control the liquid entering of the suction pipe orifice.

Further, the liquid discharge module comprises a discharge pipe orifice, a valve assembly and a discharge cavity, wherein the suction cavity is communicated with the discharge cavity, and the opening/closing of the valve assembly of the discharge module is controlled to control the liquid discharge of the discharge pipe orifice under the action of the piston mechanism.

A drilling pump set comprises the high-power five-cylinder drilling pump.

The solid control system comprises the high-power five-cylinder drilling pump.

A drilling machine, report the above-mentioned a kind of high-power five jars of well pumps.

In summary, due to the adoption of the technical scheme, the beneficial effects of the invention are as follows:

1. the high-power five-cylinder drilling pump, the drilling pump group, the solid control system and the drilling machine realize modularized design on the design of the whole structure, can effectively solve the problem of larger structure of the traditional drilling pump or the drilling pump group on the spatial layout of the structure, and solves the problem of complex structure caused by an intermediate mechanical variable speed transmission mechanism such as belt transmission, chain transmission and the like on the basis of the traditional structural design.

2. Based on the design of motor, adopt the structure that single motor overhead directly drives structurally, the motor passes through the conical surface direct heat dress in the motor shaft both sides in the frame top, makes the simple structure of drilling pump, reduces width direction's size, satisfies the transportation requirement.

3. The five-cylinder design adopted by the invention reduces the discharge flow rate and the pressure fluctuation by 16.5 percent compared with a three-cylinder drilling pump, and the pressure fluctuation at high pressure is only 2 to 3 percent.

Drawings

The invention will now be described by way of example and with reference to the accompanying drawings in which:

fig. 1 is a schematic diagram of an ac variable frequency drilling pump of the present invention.

Fig. 2 is a schematic diagram of the front view of the ac variable frequency drilling pump of the present invention.

Fig. 3 is a schematic diagram of a top view of an ac variable frequency drilling pump of the present invention.

Fig. 4 is a schematic diagram of the transmission assembly of the ac variable frequency drilling pump of the present invention.

Fig. 5 is a schematic structural diagram of an ac variable frequency drilling pump drive wheel assembly of the present invention.

Fig. 6 is an enlarged schematic view of the structure at B in fig. 5.

Fig. 7 is a schematic diagram of the front view of the permanent magnet variable frequency drilling pump of the present invention.

Fig. 8 is a schematic diagram of the top view of the permanent magnet variable frequency drilling pump of the present invention.

Fig. 9 is a schematic structural view of the permanent magnet variable frequency drilling pump transmission assembly of the present invention.

Fig. 10 is a schematic structural diagram of the assembly of the driving wheel of the permanent magnet variable frequency drilling pump of the invention.

Fig. 11 is an enlarged schematic view of the structure at a in fig. 10.

Fig. 12 is a schematic view of the structure of the case of the present invention.

Fig. 13 is a schematic view of the power end assembly of the present invention.

Fig. 14 is an assembled schematic view of the inventive cross-head structure.

Fig. 15 is a schematic view of the fluid end assembly of the present invention.

The marks in the figure: 1-drive assembly, 11-motor module, 12-drive wheel, 13-driven wheel, 14-crankshaft, 15-support bearing, 16-connecting rod, 17-rotating shaft, 18-frame, 19-bearing housing, 110-bell crank, 111-crankcase, 112-motor mount, 2-power end assembly, 21-crosshead box, 22-crosshead structure, 221-slideway housing, 223-telescoping rod, 222-cross hinge, 23-crosshead chamber, 24-housing cover plate, 25-cylinder chamber, 26-front wall plate, 3-hydraulic end assembly, 31-hydraulic end housing, 32-piston cylinder, 33-piston rod, 34-piston head, 35-bolt, 36-cylinder sleeve bolt, 37-platen, 38-gland locking disc, 39-cylinder sleeve nut, 310-positioning pin, 311-cylinder sleeve disc, 312-suction nozzle, 313-valve assembly, 314-suction cavity, 315-discharge nozzle, 316-discharge cavity, 317-end flange, 318-stopper, 319-wear disc.

Detailed Description

All of the features disclosed in this specification, or all of the steps in a method or process disclosed, may be combined in any combination, except for mutually exclusive features and/or steps.

Any feature disclosed in this specification may be replaced by alternative features serving the same or equivalent purpose, unless expressly stated otherwise. That is, each feature is one example only of a generic series of equivalent or similar features, unless expressly stated otherwise.

Example 1

The high-power five-cylinder drilling pump comprises a transmission assembly 1, a power end assembly 2 and a hydraulic end assembly 3, wherein the transmission assembly 1 is connected with the power end assembly 2 in an assembled mode, the power end assembly 2 is connected with the hydraulic end assembly 3, and the traditional assembly 1 provides power and drives the hydraulic end assembly 3 to work through the power end assembly 2;

the transmission assembly 1 comprises a motor module 11, a transmission mechanism and a crank connecting rod mechanism, wherein the motor module 11 is connected and assembled with the crank connecting rod mechanism through the transmission mechanism, and the motor module 11 is used for realizing the movement of the crank connecting rod mechanism;

the power end assembly 2 comprises a plurality of power units, each power unit is assembled and connected to a crank connecting rod mechanism, the other end parts of the power units are respectively and independently provided with a piston mechanism of the hydraulic end assembly 3, and the hydraulic end assembly 3 is driven by the power end assembly 2.

In this embodiment, the drilling pump is designed as a module, and a modularized design is adopted for the transmission assembly 1, the power end assembly 2 and the hydraulic end assembly 3, so that the whole structure can be effectively simplified, and the whole structure has a better space simplification effect. Meanwhile, in maintenance of the whole equipment, the structural design has the advantage of convenience in maintenance, and has a better effect in work efficiency.

Based on the above specific structure, as a further design, specific optimization and design are performed for the transmission assembly, in another specific embodiment, the transmission assembly 1 comprises a frame 18, a motor module 11 is arranged on the frame 18, the transmission mechanism comprises a driving wheel 12 arranged on the motor module 11, and a driven wheel 13 for driving a crank-link mechanism, the crank mechanism comprises a crank shaft 14, the crank shaft is provided with the driven wheel 13, and a plurality of support bearings 15 and a plurality of connecting rods 16 are assembled on the crank shaft 14. In the design, the crank-link mechanism is driven by the motor module through the transmission mechanism to serve as a power output part of the whole equipment.

As a more specific design, on the basis of the above specific structural design, as a more specific design, driving wheels 12 are arranged on two sides of the motor module 11, driven wheels 13 are arranged on two ends of the crankshaft, the motor module 11 controls 2 driving wheels 12 to synchronously rotate, and the driving wheels 12 are matched with the driven wheels 13 to realize rotation of the crankshaft 14. In the design, the structure design of directly driving the driven wheel through the driving wheel 12 can effectively solve the problem of complex structure caused by belt transmission and chain transmission. As more specific description, the design of the whole transmission assembly is effectively realized to realize modularized design, and the whole part can be integrated, so that the transmission assembly is convenient to install and transport, and parts are reduced.

On the basis of the above-described design of the specific structure, as a specific description, a specific design is made for the frame 18, the frame 18 includes a crank case 111, the crank case 111 is provided with a motor base 112, and both sides of the motor base 112 are provided with bearing seats 19 for assembling a motor shaft. In this structural design, motor cabinet 112 is used for motor module's design, simultaneously, on the assembly position, still is provided with the connecting block that is used for preventing the slope, and the motor is assembled well back and with connecting block fixed assembly. And the structure of the crank case 111 is applied to the assembly of the crank connecting structure.

On the basis of the above specific structural design, as a more specific design, two sides of the motor module 11 are provided with rotating shafts 17, and two ends of the rotating shafts 17 are fixedly provided with driving wheels 12.

For the driving wheel 12 mounted on the rotating shaft 17, as a specific description, in this embodiment, the driving wheel 12 is fixedly mounted on the rotating shaft 17, so as to realize synchronous rotation of the driving wheel 12 and the rotating shaft 17, and a more preferable design is adopted, and the driving wheel 12 is mounted on the rotating shaft 17 in an interference fit manner.

In the interference fit, the specific embodiment of the present invention has different manners, as a more preferable structure, the driving wheel 12 has a tapered inner hole, the end of the rotating shaft 17 is a tapered column, and the assembly of the tapered inner hole and the tapered column is realized through the interference fit, so as to facilitate the disassembly of the driving wheel 12. The design of this structure is more convenient that possesses the maintenance, once have when dismantling loose then can effectually realize the dismantlement of action wheel 12.

On the basis of the design of the specific structure, and as a specific design of the rotating shaft, as a specific, the rotating shaft 17 is of an integral structure, or the rotating shaft is of a split structure, and synchronous rotation is realized under the action of the motor module. In the present design, the rotation shaft 17 is a unitary structure, as a more preferable mode. Namely: the driving wheel 12 is coaxially arranged. Specifically, in order to ensure the rotation of the crankshaft 14, even in the case of a split structure design, i.e., the driving wheels 12 are respectively connected to one rotation shaft, specific requirements are that: the rotation of the 2 driving wheels 12 is synchronous rotation.

On the basis of the design of the specific structure, the crank-link mechanism is designed deeply, and more specifically, the crankshaft 14 is provided with a plurality of crank throws 110, the crankshaft 14 is fixedly assembled on the frame 18 through a plurality of support bearings 15, the crank throws 110 are positioned between two adjacent support bearings 15, and the connecting link 16 is assembled on the crank throws. In the field of engines, the drive is effected by assembling a large-head connecting rod at the bell crank 110, while the large-head of the connecting rod 16 is mounted on the bell crank, the other end being connected to the driven part.

As a more specific design, the support bearings 15 have 6, and the bell cranks 110 have 5. In this design, the design is a 5-cylinder structure. The traditional structure is mainly of a 3-cylinder type, and the difference of the traditional structure is based on the whole structure, so that the structure is simpler, the structure is more modularized, the traditional structure is relatively large in equipment, the structure is complex, and the design of the cylinder body is substantially different.

The crankshaft 14 is forged from alloy steel, specifically designed for the crankcase 111 and specific crank-connecting rod structure. The crankshaft 14 is composed of six journals and five bell cranks 110, and 6 support bearings are mounted and fixed on six support bearing blocks. The 6 support bearing seats adopt integral crankshaft bearing seats, one bearing seat at one side (preferably the leftmost side) adopts a positioning spigot design, and after the inner ring and the retainer of the bearing are firstly hot-packed by the crankshaft 14, the whole body is hung into the support bearing seat from the selected side, so that the installation accuracy is high and the reliability is strong. The crankshaft support structure of the five-cylinder drilling pump adopts a 6-point support beam structure, compared with a two-point support simple support beam structure of a conventional drilling pump, the main bearing has smaller stress and longer service life, and the maintenance cost of customers is effectively reduced.

Based on the above specific structural design, specific assembly design is performed for the driving wheel 12 and the driven wheel 13, and the structural specific mode thereof has the following modes:

1. the driving wheel 12 and the driven wheel 13 are driven in a bevel gear meshing mode;

2. the driving wheel 12 and the driven wheel 13 realize transmission in a straight tooth meshing mode.

As a specific description, in designing the engagement method, the first method, that is, the method of engagement with helical teeth is more preferable. The design of the structure has stability, especially in the aspect of transmission effect, and the service life of the structure is also better improved.

As a more specific design, on the basis of gear engagement, the diameter of the driving wheel 12 is smaller than the diameter of the driven wheel 13 as a specific action effect thereof to achieve a deceleration effect.

On the basis of the above-described design of the specific structure, as a more specific description, the motor module 11 is an overhead type. Structurally, a single motor overhead direct drive structure is adopted, a motor is arranged above a frame, and driving wheels 12 are directly thermally arranged on two sides of a motor shaft through conical surfaces, so that the drilling pump is simple in structure, the size in the width direction is reduced, and the transportation requirement is met.

In this embodiment, as a more specific design, as shown in fig. 7 to 11, the motor module 11 is a permanent magnet integrated motor.

The motor and the frequency converter are integrally designed, the arrangement of a VFD room is canceled, and the permanent magnet motor is directly driven, so that the device has the characteristics of high efficiency, energy conservation, low manufacturing cost and low transportation cost. The power factor is increased from about 0.83 to over 0.95; the rated efficiency is improved from about 0.91 to about 0.968. The permanent magnet motor has smaller current and copper loss, and the rated current is reduced by about 350A under the same power. The structure is flexible, the volume is small, and the reliability is high. The permanent magnet machine relies on the permanent magnet, and the rotor does not generate heat, only needs to water-cool the stator. Compared with a variable frequency asynchronous motor, the energy is saved by more than 10%, and the operation cost of a customer is greatly reduced.

Example 2

On the basis of the design of embodiment 1, the motor module 11 is an ac inverter motor, as shown in fig. 1 to 6, unlike embodiment 1 in the design of the motor. More preferably, the motor module is a three-phase squirrel-cage asynchronous motor.

In the embodiment, the alternating current variable frequency motor is directly driven, and compared with the traditional structure, the transmission efficiency is improved by about 3% -5%; the performance parameters of the alternating current variable frequency motor are matched to meet the use requirement of the drilling pump, and the motor is manufactured according to an electromechanical fusion design, so that the motor has long service life, high reliability and high stability, and is convenient and quick to maintain on site. The motor fully utilizes the constant power section to realize the ultra-large displacement output. The maximum displacement of the direct-drive drilling pump is 1.2-1.5 times of the displacement of the drilling pump with the same level

Example 3

On the basis of the design of embodiment 1, as the assembly between the driving wheel 12 and the rotating shaft 17 is different, the interference fit mode is not adopted in this embodiment, specifically, the driving wheel 12 is fixedly assembled on the rotating shaft 17 through key connection.

As a specific description, the structure of the present embodiment can achieve the effect of disassembly, but during the rotation of the rotor, the member receiving torque force is a key, and although the effect can be achieved, the service life is an effect that cannot effectively achieve the interference fit of the conical surface.

Example 4

On the basis of the design of embodiment 1, the driving wheel 12 and the rotating shaft 17 are also designed in an interference fit manner, except that specifically, the driving wheel 12 has a cylindrical inner hole, the end of the rotating shaft 17 is a circular column, and the assembly of the cylindrical inner hole and the circular column is realized through the interference fit.

In this embodiment, the interference fit effect of conventional shaft hole and the axle that adopts, it can be effectual realization effort comparatively balanced function in specific effect, but can cause the damage of axis of rotation or action wheel at the dismantlement in-process, has also prolonged the time of dismantling simultaneously, is unfavorable for the efficiency of maintenance.

Example 5

On the basis of the above embodiment, more specific design is made for the power end assembly, as shown in fig. 12 to 14, the power end assembly 2 includes a cross head box 21, the cross head box 21 is provided with a plurality of cross head chambers 23 for assembling a cross head structure 22, the crank link mechanism is provided with a plurality of links 16, each link 16 is assembled with a corresponding cross head structure 22 in a connecting way, and the cross head structure 22 can realize linear reciprocating motion under the acting force of the links 16.

In this embodiment, as a specific description, in order to better realize the design of the whole structure, after the cross head structure 22 is assembled and connected with the connecting rod 16, since the connecting rod 16 is in reciprocating motion, the cross head structure 22 can realize the motion of the cross head structure into linear reciprocating motion, thereby effectively realizing the driving effect.

Based on the above-described design of the specific structure, as a more specific design, the crosshead housing 21 is further provided with a housing cover plate 24 for covering the crosshead chamber 23.

Based on the design of the specific structure, the crosshead housing 21 is further provided with a housing cover plate 24 for covering the crosshead chamber 23, among the specific structures, based on the use environment thereof.

In the present embodiment, the case cover 24 is specifically described as a case cover 24 as a conventional application, and the case cover 24 is of an integral structure.

On the basis of the design of the connecting structure, as a more specific description and a detailed description, a crank case 111 for assembling a crank-link mechanism is arranged at the front end of the cross head box 21, a motor base 112 is arranged above the crank case 111, bearing seats 19 for assembling motor shafts are arranged on two sides of the motor base 112, a cylinder chamber 25 is arranged at the end part of the cross head box 21 for assembling the hydraulic end assembly 3, and a front wall plate 26 is arranged at the end part of the cylinder chamber 25 for connecting the hydraulic end assembly 3. Specifically, in the design of the whole structure, the whole power end assembly 2 forms an integral module, and after the modules are fixedly assembled, the whole structure is effectively compact, and the size of the drilling pump is better reduced.

Example 6

On the basis of the design of embodiment 5, as a more specific design, unlike the design of embodiment 5, the structural design of the box cover plate is different from that of embodiment 5, and as a specific description, the box cover plate 24 is of a split type structure, and the box cover plate includes a plurality of cover plate units, and each of the crosshead chambers is provided with a cover plate unit, so that the efficiency of equipment maintenance is improved.

In this embodiment, the conventional drilling pump is of a unitary cover plate construction, the removal of the cross-head structure 22 is only possible from the side opening, and if the cross-head structure 22 of the middle cylinder is removed, the cross-head structures 22 of the two side cylinders must be removed. Comparative experiments in an assembly plant have found that also removing and installing one intermediate cylinder crosshead structure 22, 3 masters of a conventional borehole pump takes 10 hours, whereas 2 masters of a five cylinder borehole pump take 3 hours in the present design. The independent upper opening type cross head box body greatly shortens the maintenance time of clients. As a more specific structural design, the cross head structure 22 includes a slide housing 221 forming a slide, a telescopic rod 223 is disposed inside the slide housing 221, and the telescopic rod 223 is used for connecting the end of the connecting rod 16 and the connecting rod 16 to be hinged through a cross hinge 222, so as to change the movement direction.

Example 7

On the basis of the design of the above embodiment, the hydraulic end assembly 3 is specifically designed according to the design of the hydraulic end assembly, as shown in fig. 15, and the hydraulic end assembly 3 includes a liquid suction module, a liquid discharge module, and a piston mechanism connected to the power end assembly, and the suction and discharge of the liquid are controlled by the movement of the piston mechanism;

the liquid suction module sucks liquid in a state that the piston mechanism is contracted;

the liquid discharge module discharges liquid in a state where the piston mechanism advances.

In the design of the structure, as the design of the hydraulic end assembly, through the reciprocating motion of the piston mechanism, the design based on the suction module and the discharge module can effectively realize the inlet and the discharge of liquid, and as a special description, the structure can effectively complete the circulation of drilling fluid of the whole structure. And the whole structure also needs to be subjected to modularized structural design.

Specifically, based on the design of the specific structure, in one specific embodiment, the hydraulic end assembly 3 includes a hydraulic end frame 31, the piston mechanism includes a piston cylinder 32 assembled on the hydraulic end frame, a piston rod 33 located inside the piston cylinder 32, and a piston head 34 disposed at an end of the piston rod, where the other end of the piston rod 33 is assembled with the power end assembly 2 to implement operation of the piston mechanism. In the design of the structure, the structure is not required to be considered to be assembled with a front-end device, and the assembly of the structure is also required to be considered, especially in the process of realizing the modularized design of the structure, and the main purpose of the structure is to realize the simplicity and the compactness of the structure better. As a more specific design, the piston rod 33 is connected to the cross-head structure by a clip.

As a more specific design, based on the design of the above embodiment, the end portion of the power end assembly 2 for assembling the hydraulic end assembly is provided with a cylinder chamber 25, and the end portion of the cylinder chamber 25 is provided with a front wall plate 26 for connecting the hydraulic end assembly 3.

As a more specific structural design, the piston mechanism may be fitted within the cylinder chamber 25 to facilitate assembly of the piston mechanism with the power end assembly 2.

Based on the design of the specific structure, the hydraulic end frame 31 is assembled with the front wall plate through bolts 35 to realize the assembly of the whole device. In this structural design, the bolts 35 are stud bolts. The two ends are tightly combined and tensioned through nuts.

In terms of structural design, in order to realize that the piston cylinder is assembled at the end of the hydraulic end frame, as a specific description, the piston cylinder 32 is assembled on the hydraulic end frame 31 through a plurality of cylinder sleeve bolts 36, and a pressing plate 37 is further arranged on the piston cylinder 32, and the cylinder sleeve bolts 36 penetrate through the pressing plate 37 and are combined on the hydraulic end frame 31. In the action process, an end flange 317 is arranged at the end of the piston cylinder 32, the cylinder sleeve bolt 36 is a stud, a limiting block 318 is arranged on the piston cylinder 32, the pressing plate 37 is assembled at the limiting block 318 and is assembled with the limiting block 318 in a fitting manner, and the cylinder sleeve bolt 36 passes through the pressing plate 37 and the limiting block 318 and then passes through the end flange 317 through threads to be assembled on the hydraulic end rack 31. The front end of the pressing plate 37 is engaged by a cylinder sleeve nut 39.

Based on the design of the above specific structure, in order to ensure the assembly effect, specifically, the front end of the pressing plate 37 is provided with a pressing cover locking disc 38, the pressing cover locking disc 38 is positioned by a cylinder sleeve nut 39, the rear end of the pressing cover locking disc 38 is provided with the cylinder sleeve nut 39 for being attached to the pressing plate 37 to realize positioning, and the front end of the pressing cover locking disc 38 is provided with the cylinder sleeve nut 39 to realize that the pressing cover locking disc 38 is positioned between the two cylinder sleeve nuts 39. By means of the method, the assembly effect of the whole device can be further guaranteed.

As a more specific design, for easy disassembly and assembly, a cylinder liner disc withdrawing mechanism is arranged at the rear end of the pressing plate 37, the cylinder liner disc withdrawing mechanism comprises a positioning pin shaft 310 fixed at the outer side of the piston cylinder 32 and a cylinder liner disc withdrawing 311, the cylinder liner disc withdrawing 311 can axially move along a cylinder liner bolt 36, a cylinder liner nut 39 is further arranged at the end part of the cylinder liner disc withdrawing 311, a limiting block 318 is arranged on the piston cylinder 32, the front end of the cylinder liner nut 39 is assembled with the limiting block 318 in a fitting way, and the cylinder liner disc withdrawing 311 is fixedly connected with the positioning pin shaft 310;

when the cylinder liner is disassembled, the cylinder liner nut 39 at the front end of the pressing plate 37 is withdrawn a certain distance or after being disassembled, the cylinder liner nut 39 at the rear end of the cylinder liner withdrawing disc 311 is screwed to realize the withdrawal of the piston cylinder 32.

In this structure, the cylinder sleeve nut at the front end is detached firstly, and after the cylinder sleeve nut 39 at the front end of the pressing plate 37 is withdrawn, the cylinder sleeve nut 39 at the rear end of the cylinder sleeve withdrawing disc 311 can push the cylinder sleeve withdrawing disc to drive the positioning pin shaft 310 and drive the piston cylinder to withdraw outwards, so that the effect of rapid detachment is realized.

As a more specific design, a wear-resistant disc 319 is also provided between the piston cylinder 32 and the mounting end face of the hydraulic end frame 31, so as to improve the service life of the whole device.

In the above specific structural design, the suction module and the discharge module of the fluid end assembly 3 are designed specifically:

the liquid suction module comprises a suction nozzle 312, a valve assembly 313 and a suction cavity 314, and the opening/closing of the valve assembly is controlled to control the liquid entering of the suction nozzle under the action of a piston mechanism.

The liquid discharge module includes a discharge nozzle 315, a valve assembly 313, and a discharge chamber 316, the suction chamber 316 communicates with the discharge chamber 314, and the opening/closing of the valve assembly 313 of the discharge module is controlled to discharge liquid from the discharge nozzle by a piston mechanism.

In the above specific structural design, as a specific description of the action, in the design of the valve assembly 313, it can be seen that the valve assembly of the suction module is opened upwards by the suction force and is filled with liquid when the piston is withdrawn, and the valve assembly of the discharge module is kept closed by the downward force, for better illustration, because the valve assembly is provided with an elastic member at the design position of the valve rod; when the piston moves forwards, the valve assembly of the suction module receives downward thrust due to internal pressure, the suction module is kept in a closed state, and the valve assembly of the discharge module receives upward thrust at the moment, so that the valve assembly of the discharge module is promoted to be opened, and the liquid is discharged.

On the basis of combining the above embodiments, in order to facilitate the hoisting of the whole drilling pump, the drilling pump further comprises a lifting lug for hoisting on a specific structure. Specifically, the direct-drive drilling pump has small volume and light weight, is suitable for being installed in land pump rooms, ocean drilling platforms and transport trailers, and can be used for hoisting helicopters.

Example 8

A drilling pump unit comprising a high power five-cylinder drilling pump according to any of the single or combined embodiments described above.

Example 9

A solid control system comprises the high-power five-cylinder drilling pump according to any of the single or combined embodiments of embodiments 1-7.

Example 10

A drilling rig comprising a high power five-cylinder drilling pump according to any of embodiments 1 to 7, singly or in combination.

To sum up:

1. the high-power five-cylinder drilling pump and the drilling pump set realize modularized design on the design of the whole structure, can effectively solve the problem of larger structure of the traditional drilling pump or the drilling pump set on the spatial layout of the structure, and solve the problem of complex structure caused by an intermediate mechanical variable speed transmission mechanism such as belt transmission, chain transmission and the like on the basis of the traditional structural design, thereby effectively realizing the optimization effect of the whole structure.

The invention is not limited to the specific embodiments described above. The invention extends to any novel one, or any novel combination, of the features disclosed in this specification, as well as to any novel one, or any novel combination, of the steps of the method or process disclosed.

Claims

1. A high-power five-cylinder drilling pump is characterized in that: the hydraulic end assembly is assembled and connected with the transmission assembly, the power end assembly is connected with the hydraulic end assembly, the transmission assembly provides power, and the hydraulic end assembly is driven to work through the power end assembly;

the power end assembly comprises a plurality of power units, one end of each power unit is assembled and connected with the crank connecting rod mechanism, the other end of each power unit is independently provided with a piston mechanism of the hydraulic end assembly, and the hydraulic end assembly is driven by the power end assembly;

the power end assembly comprises a cross head box body, the cross head box body is provided with a plurality of cross head chambers used for assembling a cross head structure, the crank connecting rod mechanism is provided with a plurality of connecting rods, each connecting rod is connected and assembled with the corresponding cross head structure, and the cross head structure can realize linear reciprocating motion under the acting force of the connecting rods;

the crosshead box is also provided with a box cover plate for covering the crosshead cavity;

the box cover plate is of a split structure and comprises a plurality of cover plate units, and each cross head cavity is provided with one cover plate unit, so that the equipment maintenance efficiency is improved;

the hydraulic end assembly comprises a liquid suction module, a liquid discharge module and a piston mechanism connected with the power end assembly, the hydraulic end assembly comprises a hydraulic end rack, the piston mechanism comprises a piston cylinder assembled on the hydraulic end rack, a piston rod positioned in the piston cylinder and a piston head arranged at one end of the piston rod, and the other end of the piston rod is assembled with the power end assembly to realize the operation of the piston mechanism;

the piston cylinder is assembled on the hydraulic end rack through a plurality of cylinder sleeve bolts, the piston cylinder is also provided with a pressing plate, the cylinder sleeve bolts penetrate through the pressing plate and are combined on the hydraulic end rack, the front end of the pressing plate is provided with a gland locking disc, the gland locking disc is positioned through cylinder sleeve nuts, the rear end of the gland locking disc is provided with a cylinder sleeve nut which is used for being attached to the pressing plate to realize positioning, and the front end of the gland locking disc is provided with another cylinder sleeve nut to realize that the gland locking disc is positioned between the two cylinder sleeve nuts;

the rear end of the pressing plate is provided with a cylinder sleeve disc withdrawing mechanism, the cylinder sleeve disc withdrawing mechanism comprises a positioning pin shaft fixed on the outer side of a piston cylinder and a cylinder sleeve disc withdrawing mechanism, the cylinder sleeve disc withdrawing mechanism can axially move along a cylinder sleeve bolt, the end part of the cylinder sleeve disc withdrawing mechanism is also provided with a cylinder sleeve nut, the piston cylinder is provided with a limiting block, the front end of the cylinder sleeve nut at the end part of the cylinder sleeve disc withdrawing mechanism is assembled with the limiting block in a fitting way, and the cylinder sleeve disc withdrawing mechanism is fixedly connected with the positioning pin shaft for assembly;

when the piston cylinder is disassembled, the cylinder sleeve nut at the front end of the pressing plate is led to withdraw a certain distance or disassembled, and then the cylinder sleeve nut at the rear end of the cylinder sleeve withdrawing disc is screwed to withdraw the piston cylinder.

2. A high power five-cylinder drilling pump as defined in claim 1, wherein: the transmission assembly comprises a frame, a motor module is arranged on the frame, the transmission mechanism comprises a driving wheel arranged on the motor module and a driven wheel used for driving a crank-link mechanism, the crank-link mechanism comprises a crankshaft, the crankshaft is provided with the driven wheel, and a plurality of support bearings and a plurality of connecting rods are assembled on the crankshaft;

the two sides of the frame are provided with driving wheels, the two ends of the crankshaft are provided with driven wheels, the motor module controls 2 driving wheels to synchronously rotate, and the driving wheels are matched with the driven wheels to realize rotation of the crankshaft.

3. A high power five-cylinder drilling pump as defined in claim 2, wherein: the motor module both sides are provided with the axis of rotation, the both ends fixed mounting of axis of rotation has the action wheel, action wheel fixed mounting in on the axis of rotation, in order to realize the action wheel with the axis of rotation synchronous rotation.

4. A high power five-cylinder drilling pump as defined in claim 3, wherein: the driving wheel is assembled on the rotating shaft in an interference fit mode, the driving wheel is provided with a conical inner hole, the end part of the rotating shaft is a conical column, and the conical inner hole and the conical column are assembled in an interference fit mode, so that the driving wheel is convenient to disassemble;

or the driving wheel is assembled on the rotating shaft in an interference fit mode, the driving wheel is provided with a cylindrical inner hole, the end part of the rotating shaft is a circular column, and the assembly of the cylindrical inner hole and the circular column is realized through the interference fit.

5. A high power five-cylinder drilling pump as defined in claim 3, wherein: the rotating shaft is of an integral structure, or the rotating shaft is of a split structure, and synchronous rotation is realized under the action of the motor module.

6. A high power five-cylinder drilling pump as defined in claim 2, wherein: the crankshaft is fixedly assembled on the frame through a plurality of support bearings, the crank is positioned between two adjacent support bearings, and a connecting rod is assembled on the crank.

7. The high power five-cylinder drilling pump of claim 6, wherein: the support bearings have 6 and the bell crank has 5.

8. A high power five-cylinder drilling pump as defined in claim 2, wherein: and the driving wheel and the driven wheel are driven by adopting a bevel gear meshing or straight gear meshing mode.

9. The high power five-cylinder drilling pump of claim 8, wherein: the diameter of the driving wheel is smaller than that of the driven wheel so as to achieve a speed reduction effect.

10. A high power five-cylinder drilling pump as defined in any one of claims 1-9, wherein: the motor module is overhead or, the motor module is a permanent magnet integrated motor or the motor module is an alternating current variable frequency motor.

11. A high power five-cylinder drilling pump as defined in claim 1, wherein: the front end of the cross head box body is provided with a crank case for assembling a crank connecting rod mechanism, a motor base is arranged above the crank case, bearing seats for assembling a motor rotating shaft are arranged on two sides of the motor base, a cylinder cavity is formed in the end portion of the cross head box body for assembling the hydraulic end assembly, and a front wall plate is arranged at the end portion of the cylinder cavity for connecting the hydraulic end assembly.

12. A high power five-cylinder drilling pump as defined in claim 1, wherein: the liquid suction module sucks liquid in a state that the piston mechanism is contracted;

13. A high power five-cylinder drilling pump as defined in claim 1, wherein: the end part of the power end assembly for assembling the hydraulic end assembly is provided with a cylinder chamber, and the end part of the cylinder chamber is provided with a front wallboard for connecting the hydraulic end assembly;

the piston mechanism can be assembled in the cylinder cavity, so that the piston mechanism and the power end assembly can be assembled conveniently;

the hydraulic end frame is assembled with the front wall plate through bolts to realize the assembly of the whole device.

14. A high power five-cylinder drilling pump as defined in claim 1, wherein: the liquid suction module comprises a suction pipe orifice, a valve assembly and a suction cavity, and under the action of the piston mechanism, the opening/closing of the valve assembly is controlled to control the liquid entering of the suction pipe orifice.

15. A high power five-cylinder drilling pump as defined in claim 14, wherein: the liquid discharge module comprises a discharge pipe orifice, a valve assembly and a discharge cavity, wherein the suction cavity is communicated with the discharge cavity, and the opening/closing of the valve assembly of the discharge module is controlled to control the liquid discharge of the discharge pipe orifice under the action of the piston mechanism.

16. A drilling pump stack, characterized by: a high power five-cylinder drilling pump comprising any one of claims 1-15.

17. A solid control system, characterized by: a high power five-cylinder drilling pump comprising any one of claims 1-15.

18. A drilling machine, characterized in that: a high power five-cylinder drilling pump comprising any one of claims 1-15.