CN211127456U

CN211127456U - Multi-frequency motor direct drive top drive drilling device

Info

Publication number: CN211127456U
Application number: CN202020181522.7U
Authority: CN
Inventors: 李超; 郭坤; 刘家荣; 王玉超; 刘文武; 杨鹏; 贺云超; 翁炜; 黄玉文
Original assignee: Beijing Institute of Exploration Engineering
Current assignee: Beijing Institute of Exploration Engineering
Priority date: 2020-02-18
Filing date: 2020-02-18
Publication date: 2020-07-28
Anticipated expiration: 2030-02-18

Abstract

The utility model relates to a technical field of oil drilling and geological drilling, especially relate to a multifrequency motor direct drive top drive drilling equipment, its drive mechanism is difficult for becoming invalid, energy utilization is high, volume weight is relatively compact, adopt multifrequency motor drive top drive device gyration, thereby carry out the drilling work, the motor adopts the multiple winding structure, through the connected mode of switching winding, change the winding and connect the branch number in parallel, and then change the motor frequency, export the different rotational speed and the moment of torsion of multiunit, both realize that high efficiency high power factor energy utilization is high, reduced power again and made the cost obtain reducing substantially; the multi-frequency drive motor comprises a top drive main shaft and a multi-frequency drive motor, wherein a motor main shaft of the multi-frequency drive motor is sleeved on the outer side of the top drive main shaft; the lower end of the top drive main shaft, which is located at the multi-frequency drive motor, is fixedly connected with a hanging ring hanger, the lower end of the top drive main shaft is connected with a drilling tool through a protective joint, a water inlet device is installed at the upper end of the top drive main shaft, and the multi-frequency drive motor adopts a multi-winding structure.

Description

Multi-frequency motor direct drive top drive drilling device

Technical Field

The utility model relates to a technical field of oil drilling and geological drilling especially relates to a multifrequency motor direct drive top drive drilling equipment.

Background

The top drive well drilling device is a leading-edge technical device for petroleum and geological well drilling, and is a device which can directly drive a drill string to rotate on the upper part of a derrick, and send a drill downwards along a special top drive guide rail on the derrick to complete well drilling operations such as drill string rotation, circulating drilling fluid, single joint connection, vertical joint connection, make-up, break-out, reaming and the like. Most of top drive transmission devices are driven by an asynchronous motor and a speed change mechanism, and few energy-saving electric direct-drive top drives appear in recent years; however, the motors used in the top drive system are single-frequency (single-speed) motors, the drilling machine system selects the driving motors according to the overload capacity of 2-3 times of the torque required by the normal working condition on the basis of the accident handling capacity, and the power of the motors cannot be too small.

The existing single-frequency (single-speed) motor-driven top drive device meets the use requirement of handling accidents with low speed and large torque, but is still selected according to the maximum rotation speed during normal drilling when the motor is selected. Because a mechanical speed change system is not arranged, the large-range speed reduction and torque increase working condition of the drilling machine cannot be met; if the requirements of the maximum torque and the maximum rotating speed of the drilling machine are met at the same time, the selected motor power is very large, the frequency conversion control system is very expensive, and the energy-saving effect is weakened.

The existing top drive transmission device in a non-direct-drive mode has the defects that a gear box of ① needs to be sealed, the sealing is easy to lose, lubricating oil is leaked and the gear box fails, ② scrap iron worn in the working process of the gear box easily causes lubricating oil to fail, heat dissipation is affected and the gear box fails, and ③ the existing top drive is driven by a single-speed exchange machine, needs higher power, has an overlarge speed regulation range and is difficult to control in a larger range.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a multifrequency motor direct drive top drive drilling equipment that drive mechanism is difficult for becoming invalid, energy utilization is rateed highly, volume weight is compact relatively is driven the device main shaft gyration by multifrequency motor main shaft direct drive top, thereby drives device rotational speed and moment of torsion through adjusting multifrequency motor rotational speed and moment of torsion control top.

In order to achieve the above purpose, the utility model is realized by adopting the following technical scheme:

a multi-frequency motor direct drive top drive drilling device comprises a top drive main shaft and a multi-frequency drive motor, wherein the top drive main shaft is a hollow main shaft, a motor main shaft of the multi-frequency drive motor is sleeved on the outer side of the top drive main shaft, and the inner side surface of the motor main shaft is matched with the outer side surface of the top drive main shaft; the lower end of the top drive main shaft, which is located at the multi-frequency drive motor, is fixedly connected with a hanging ring hanger, the lower end of the top drive main shaft is connected with a drilling tool through a protective joint, a water inlet device is installed at the upper end of the top drive main shaft, and the multi-frequency drive motor adopts a multi-winding structure.

In a possible technical scheme, the inner side surface of the motor spindle is in a hexagonal inner shape or a multi-mode inner shape, and the outer side surface of the top drive spindle is in a hexagonal outer shape or a multi-mode outer shape.

In a possible technical scheme, the multi-frequency driving motor is provided with a motor winding switching cabinet and a frequency converter for switching the connection mode of windings.

In a possible technical scheme, the multi-frequency driving motor is provided with a multi-frequency motor outlet box, and a multi-frequency motor outlet box winding is provided with a₁,a₂,…a_mAnd m is the number of coil groups under each phase of the motor.

A top direct drive method of a well drilling device is realized by directly driving the top drive well drilling device by a multi-frequency motor according to any one of the above, windings are used for being connected in series under normal working conditions, 1 time torque and 1 time rotating speed state are used, the rated power is f, the rated torque is T electrical parameters, and a frequency converter is controlled by adopting the electrical parameters; when the stuck-releasing accident is processed, the windings of the motor are switched to be connected in parallel, the electric parameters of n times of torque and 1/n times of rotating speed are used, the rated power is f/n, the rated torque is n x T, the frequency converter is controlled by the electric parameters, n is the multiple of the number of the parallel branches of the motor, and the value range of n is determined according to the back electromotive force of the motor and the winding form.

Compared with the prior art, the beneficial effects of the utility model are that: the multi-frequency motor is adopted to drive the top driving device to rotate, so that the drilling operation is performed, the motor adopts a multi-winding structure, the number of parallel branches of the winding is changed by switching the connection mode of the winding, the frequency of the motor is further changed, a plurality of groups of different rotating speeds and torques are output, and the working efficiency of the drilling top driving is improved; the utility model discloses simple structure adopts the mode of directly driving to make the rig system maintain conveniently structurally, does not dispose reducing gear box and lubricating arrangement, on satisfying the basis that rig operation requirement guarantees simultaneously that accident handling capacity factor of safety is high on the performance, both realize high efficiency high power factor energy utilization and rate is high, has reduced power again and has made the cost reduce by a wide margin. The top drive device is suitable for being popularized in exploration drilling equipment, comprises a top drive device of a geological drilling rig, an oil drilling rig and a water well drilling rig, and has remarkable economic effect.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic view of a cross-sectional structure of a motor spindle and a top drive spindle;

fig. 3 is an enlarged structural schematic diagram of a multi-frequency motor outlet box part.

Reference numerals: 1-a water inlet device; 2-top drive main shaft; 3-a multi-frequency drive motor; 4-a motor spindle; 5-a hanging ring hanger; 6-locking nut; 7-a protective joint; 8-multi-frequency motor outlet box.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

As shown in fig. 1, the multi-frequency motor direct drive top drive drilling device of the present invention comprises a top drive spindle 2 and a multi-frequency drive motor 3, wherein the top drive spindle 2 is a hollow spindle, a motor spindle 4 of the multi-frequency drive motor 3 is sleeved outside the top drive spindle 2, and the inner side surface of the motor spindle 4 is matched with the outer side surface of the top drive spindle 2; the lower end of the top drive spindle 2, which is positioned at the multi-frequency drive motor 3, is fixedly connected with a lifting ring hanger 5, in the embodiment, the lifting ring hanger 5 is locked by a lock nut 6 at the lower end thereof, so that the multi-frequency drive motor 3 and the top drive spindle 2 are integrated, the lower end of the top drive spindle 2 is connected with a drilling tool by a protective joint 7, the upper end of the top drive spindle 2 is provided with a water inlet device 1, and the multi-frequency drive motor 3 adopts a multi-winding structure; the multifrequency driving motor 3 drives the top drive main shaft 2 to revolve to drive the drilling tool through the protection joint 7 and drill the well, the drilling fluid passes through the passageway that water installations 1 and top drive main shaft 2 formed, through protection joint 7, enters the drilling tool, circulates.

When the top drive device drives the motor to select the type, the power of the motor cannot be too small. The top drive device designs the maximum power (rated power) according to the maximum working load, and in the process of drilling from shallow to deep by the drilling machine, the actually applied load is only 20% -30% of the maximum load, the ratio of the actual output power to the rated power is the load rate, if the asynchronous motor is adopted, the power factor and the motor efficiency are rapidly reduced at low load rate, only about 20%, and the energy is seriously wasted; if a single-speed motor is adopted, although the energy utilization rate of the motor is high, the power volume cannot be reduced; if the power of the motor is selected only according to normal working conditions, although 2 times of overload torque can be provided, the processing time of the stuck releasing accident on the drilling site is different from several minutes to continuous days, and long-time overload can cause serious heating of the motor and insufficient stuck releasing capability. The multi-frequency motor is used as a driving motor of the top driving drilling device, is a novel driving motor, adopts a multi-winding structure, changes the number of parallel branches of a winding by switching the connection mode of the winding, further changes the frequency of the motor, and outputs a plurality of groups of different rotating speeds and torques; providing rated rotating speed and torque under normal working conditions; when the stuck-releasing accident is processed, the winding connection mode is switched, so that multiple rated torques under normal working conditions are provided, and the requirements of a drilling machine system on low speed and large torque are met. The multi-frequency motor is used for only switching the winding connection mode, and the motor power is only considered according to the normal working condition, so that the power of the motor during model selection is reduced, and the continuous unfreezing capability can be provided for the drilling machine.

In this embodiment, as shown in fig. 2, the inner side surface of the motor spindle 4 is in a hexagonal inside or multiple modes, and the outer side surface of the top drive spindle 2 is in a hexagonal outside or multiple modes; the motor spindle 4 of the multi-frequency driving motor 3 directly drives the top driving spindle 2 to rotate without an intermediate link.

The winding switching of the multi-frequency driving motor 3 can adopt a motor winding switching cabinet or can be manually connected at the terminal of a motor terminal box, and the switching cabinet can be flexibly used according to the requirements of switch size, field arrangement and switching reaction speed. In this embodiment, the multi-frequency driving motor 3 is provided with a motor winding switching cabinet and a frequency converter for switching the connection mode of the windings; the multi-frequency driving motor 3 is provided with a multi-frequency motor outlet box 8, as shown in fig. 3, the winding of the multi-frequency motor outlet box 8 has a₁,a₂,…a_mM is the number of coil groups under each phase of the motor; the input electricity is connected with the multi-frequency driving motor 3 through the multi-frequency motor winding outlet box 8, different series-parallel combinations are formed by windings a1, a2 and … am according to the number of parallel branches of the motor, the number of the parallel branches of the windings is changed by switching the connection mode of the windings, the frequency of the motor is further changed, and a plurality of groups of different rotating speeds and torques are output.

In the top direct driving method of the drilling device, windings are connected in series under normal working conditions, 1-time torque and 1-time rotating speed are used, the rated power is f, the rated torque is T, and a frequency converter is controlled by adopting the electrical parameters; when the stuck-releasing accident is processed, the windings of the motor are switched to be connected in parallel, the electric parameters of n times of torque and 1/n times of rotating speed are used, the rated power is f/n, the rated torque is n x T, the frequency converter is controlled by the electric parameters, n is the multiple of the number of the parallel branches of the motor, and the value range of n is determined according to the back electromotive force of the motor and the winding form.

The top direct driving method meets the requirements on the drilling machine under the working conditions of handling accidents and heavy loads and the requirements on the drilling machine under the working conditions of normal drilling and light loads for quickly lifting and lowering the drilling machine, and realizes torque multiplication and rotating speed multiplication of top driving of the drilling machine under the condition of no gear transmission and no change of motor power by only depending on an electric control system. The requirement of the drilling machine on large torque and high rotation speed can be still met under the condition that the total power of the motor of the drilling machine is very small, and the energy utilization efficiency is greatly improved.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims

1. A multi-frequency motor direct drive top drive drilling device is characterized by comprising a top drive main shaft (2) and a multi-frequency drive motor (3), wherein the top drive main shaft (2) is a hollow main shaft, a motor main shaft (4) of the multi-frequency drive motor (3) is sleeved on the outer side of the top drive main shaft (2), and the inner side surface of the motor main shaft (4) is matched with the outer side surface of the top drive main shaft (2); the lower extreme that main shaft (2) were located multifrequency driving motor (3) is driven on the top has linked firmly rings hanger (5), main shaft (2) lower extreme is driven on the top is connected with the drilling tool through protection joint (7), main shaft (2) upper end is driven on the top and water installations (1) are installed, multifrequency driving motor (3) adopt the multi-winding structure.

2. The multi-frequency motor direct drive top drive drilling assembly as claimed in claim 1, wherein the inside surface of said motor spindle (4) is hexagonal-inside or multi-mode and the outside surface of said top drive spindle (2) is hexagonal-outside or multi-mode.

3. A multi-frequency motor direct drive top drive drilling rig as claimed in claim 1, wherein the multi-frequency drive motor (3) is provided with a motor winding switch cabinet and a frequency converter for switching the connection of the windings.

4. The multi-frequency motor direct drive top drive drilling apparatus as claimed in claim 3, wherein said multi-frequency drive motor (3) is provided with a multi-frequency motor outlet box (8), said multi-frequency motor outlet box (8) having a winding a₁,a₂,…a_mAnd m is the number of coil groups under each phase of the motor.