CN201187247Y - Oil rig driven by high voltage AC frequency conversion electric power - Google Patents

Abstract

The utility model relates to a high-voltage AC variable-frequency electric drive drilling rig used in an oil field. The drilling rig adopts two winch used high-voltage AC variable-frequency motors and a turntable used high-voltage AC variable-frequency motor, which are driven by a high-voltage power grid. Power take-off shafts of the two winch used high-voltage AC variable-frequency motors drive a winch after passing a push-tray clutch and a winch used reduction gearbox in sequence so as to enable the winch to have constant power stepless speed regulation promotion characteristics; and the turntable is driven by a special high-voltage AC variable-frequency motor through a turntable used reduction gearbox so as to realize constant torque stepless speed regulation. In the utility model, the traditional drilling rig drive mode is replaced by the high-voltage AC variable-frequency motor grouping independent drive mode, thereby simplifying the transmission structure and improving transmission efficiency. The drilling rig has the advantages of high efficiency, energy conservation, low noise, no pollution, etc. In addition, a mud circulating system can adopt the high-voltage AC variable-frequency motor to directly drive a slurry pump, so as to enable the mud circulating system to have the constant power stepless regulation flow and pressure.

Description

High-voltage AC frequency conversion electric drive oil drilling rig

technical field

The utility model belongs to the technical field of petroleum drilling and production equipment, and relates to a high-voltage AC frequency conversion power-driven petroleum drilling rig used in petroleum mines.

Background technique

An oil drilling rig is a high-power heavy-duty machine that combines multiple working machines with three working systems: rotation, lifting and circulation. Conventional oil drilling rigs adopt a unified mechanical drive powered by a diesel engine, AC-SCR-DC direct current drive or AC-VDF-AC medium and low voltage AC variable frequency electric drive, and the energy transfer distribution and motion conversion between the power machine, the working machine and the drilling tool Quite complicated, long transmission line, high energy consumption, low efficiency, the mechanical transmission efficiency from the engine to the hook is only 50% to 70%, and the mechanical transmission efficiency from the engine to the turntable is even lower than 55%.

Utility model content

The purpose of the utility model is to overcome the shortcomings of conventional oil drilling rigs, and further provide a high-voltage AC frequency conversion electric drive oil drilling rig with reasonable structure and high working efficiency.

The high-voltage AC frequency conversion electric drive oil drilling rig designed to achieve the above invention is obtained by the designer by making reasonable improvements to the structure of the existing conventional oil drilling rig. It changes the unified mechanical drive of the traditional drilling rig, C-SCR-DC direct current drive or AC -VDF-AC medium and low-voltage AC frequency conversion power drive mode is independent drive mode of high-voltage AC frequency conversion motor grouping, the specific method is: use two high-voltage AC frequency conversion for winches driven by oilfield high-voltage power grid (10KV or 6KV high-voltage power) The motor and a high-voltage AC variable-frequency motor for the turntable driven by the high-voltage power grid in the oil field. The power output shafts of the two high-voltage AC variable-frequency motors for the winch pass through the push plate clutch and the reducer box for the winch in sequence, and at the same time cooperate with the main brake of the winch and the auxiliary The input shaft of the brake is connected, and the power output shaft of the high-voltage AC frequency conversion motor for the turntable is connected with the input shaft of the turntable through a reduction box for the turntable.

Compared with the prior art, the utility model has the following advantages: 1. Utilizing the oil field high-voltage power grid, adopting the high-voltage AC frequency conversion motor group independent drive mode, which simplifies the transmission structure, improves the transmission efficiency, and has high efficiency, energy saving, low noise, No pollution and other significant advantages; 2. The power output shafts of two high-voltage AC variable frequency motors for winches pass through the push plate clutch and the reducer for winches in turn, and are connected with the input shafts of the main brake and auxiliary brake of the winch at the same time. The brake adopts double-acting pneumatic push disc brake, and the auxiliary brake adopts energy-consumption braking type brake, so that the winch has the characteristic of constant power stepless speed regulation; Constant torque stepless speed regulation. In addition, the mud circulation system configured with the drilling rig can also use a high-voltage AC variable frequency motor to directly drive the mud pump, so that the mud circulation system has constant power and stepless adjustment of flow and pressure.

Description of drawings

Fig. 1 is the working structure schematic diagram of the utility model.

Fig. 2 is a schematic diagram of the drive system of the utility model winch.

Fig. 3 is a schematic diagram of the turntable transmission system of the present invention.

The labels in the figure are: 1-high-voltage AC frequency conversion motor for winch; 2-reduction box for winch; 3-push plate clutch; 4-double-acting pneumatic push plate brake; 5-winch; 6-energy-consumption braking brake; 7-high-voltage AC frequency conversion motor for turntable; 8-gearbox for turntable; 9-turntable; 10-∏ telescopic derrick; 11-base; 12-mud circulation system.

Detailed ways

Referring to the accompanying drawings, the high-voltage variable-frequency electric drive oil drilling rig of the utility model includes a high-voltage AC variable-frequency motor 1 for a winch, a high-voltage AC variable-frequency motor 7 for a turntable, a base 11, a winch 5, and double-acting pneumatic push disc brakes installed on the ground foundation. (main brake) 4, energy consumption brake (auxiliary brake) 6 and telescopic derrick 10 and turntable 9 on the base 11, etc., wherein the winch uses a high-voltage AC frequency conversion motor 1 and the turntable uses a high-voltage AC frequency conversion motor 7 to form The power system of the drilling rig. The mud circulation system 12 in Fig. 1 also uses a high-voltage AC frequency conversion motor to directly drive the mud pump, so that the mud circulation system has constant power and stepless adjustment of flow and pressure. In the drive system of the winch shown in Figure 2, the power input shaft of the high-voltage AC variable frequency motor 1 for the winch passes through the push plate clutch 3 and the winch reducer 2 in turn, and simultaneously cooperates with the double-acting pneumatic push plate brake 4 of the winch and the energy consumption braking type The input shaft of brake 6 is connected. In the turntable transmission system shown in FIG. 3 , the power output shaft of the high-voltage AC variable frequency motor 7 for the turntable is connected to the input shaft of the turntable 9 through the reduction box 8 for the turntable.

Claims (2)

1, a kind of high-voltage alternating frequency conversion driven by power oil-well rig, comprise the winch high-voltage alternating variable-frequency motor (1) that is installed on the basis, ground, rotating disk high-voltage alternating variable-frequency motor (7), base (11), winch (5), the pneumatic push-plate brake of double acting (4), dynamic braking formula brake (6) and be located at telescope pole (10) and rotating disk (9) on the base (11), wherein winch constitutes the dynamical system of rig with high-voltage alternating variable-frequency motor (7) with high-voltage alternating variable-frequency motor (1) and rotating disk, it is characterized in that: have two winches high-voltage alternating variable-frequency motor (1) and a rotating disk high-voltage alternating variable-frequency motor (7) by oil field High-Voltage Network driving work by oil field high-voltage fence driving work, after wherein two winches are used reduction box (2) by push-plate clutch (3) and winch successively with the power output shaft of high-voltage alternating variable-frequency motor (1), power shaft with pneumatic push-plate brake of double acting (4) and dynamic braking formula brake (6) connects simultaneously, and rotating disk connects with rotating disk (9) power shaft with reduction box (8) by rotating disk with the power output shaft of high-voltage alternating variable-frequency motor (7).

2, high-voltage alternating frequency conversion driven by power oil-well rig according to claim 1, it is characterized in that winch (5) is directly driven with high-voltage alternating variable-frequency motor (1) by the winch with oil field high-voltage fence UNICOM, rotating disk (9) is directly driven with high-voltage alternating variable-frequency motor (7) by the rotating disk with oil field high-voltage fence UNICOM.

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