What are the factors that affect the transmission design of the drilling rig winch

The winch of the extra-deep well drilling rig is driven by a plurality of high-power motors through parallel vehicles, which ensures the power demand of the drilling process; Due to the symmetrical structure of the multi-motor drive system of the winch, the vibration and uneven force of the drum shaft are significantly reduced. However, due to manufacturing reasons, there are differences in mechanical characteristics even for motors of the same model and specification. Therefore, in the process of driving the winch drum, there is asynchronous and uneven load distribution between the motors of the motor group, which affects the transmission efficiency of the system and causes unnecessary energy loss.

If this condition persists for a long time, it will not only cause damage to the motor, but also affect the drilling process. In view of the above problems, this paper combines the actual working conditions and theoretically studies the coordinated control technology of multi-motor of winch. This article first analyzes the dual-motor drivetrain.

1. The influence of drilling equipment on the ROP.

Drilling equipment is suitable for a variety of formations and is also a key factor affecting ROP. In the early 80s, jet drilling was widely used in oil and gas exploration and development, which greatly increased the drilling speed. In recent years, drilling equipment and drilling technology have not made much progress, although there are many drilling projects that have introduced 1300 horsepower mud pumps, but the actual power of the mud pump can not play 60% of the design value, most of the mud pumps can only work under 50% of the rated working conditions, and the pump pressure exceeds 20MPa will frequently repair the pump, which affects the improvement of the mechanical drilling rate.

With the wide application of casing drilling equipment in drilling engineering, the time of casing and drilling has been greatly reduced, and the drilling speed has been further improved. In addition, the application of coiled tubing drilling also greatly reduces the time of starting and down, and can cut the tubing as the tubing for completion at the time of completion, thus greatly accelerating the speed of completion and drilling. The application of high-power winches and electrically driven drilling rigs in drilling equipment has also increased the ROP.

Therefore, the improvement of mechanical drilling rate is inseparable from the update and progress of drilling equipment and drilling technology, and in the process of oil and gas exploration and development, it is necessary to vigorously develop high-tech drilling equipment and further improve mechanical drilling rate.

2. The influence of drilling fluid on the ROP.

The influence of drilling fluid on ROP mainly includes factors such as drilling fluid density, rheology, solid content, lubricity, and water loss. If the solids content in the drilling fluid is higher, the ROP will be lower; The higher the viscosity of the drilling fluid, the lower the ROP. The density of drilling fluid is closely related to the solid content, and it is also related to the harmful solid content such as scattered drill cuttings or low-density inferior soil, and if these harmful components cannot be eliminated in time, it will have an adverse impact on the ROP.

The density of drilling fluid directly affects the ROP, which is inversely proportional to the ROP, the larger the ROP, the smaller the equivalent circulation density, and reducing the density of drilling fluid can effectively reduce the density of the equivalent cycle, and secondly, the viscosity can be reduced. The following factors should be considered to reduce the density of drilling fluid: (1) the pressure difference at the bottom of the well is related to the velocity of formation fluid flowing into the wellbore, and if the negative pressure difference is too large, it is easy to cause a blowout; (2) The density of drilling fluid is too low, which is easy to cause borehole instability, cause borehole rock collapse, and bury the drilling tool.

The density of drilling fluid is too high, which is easy to cause formation rupture, resulting in the loss of a large amount of drilling fluid.

3. The influence of strata on the ROP.

The influence of the formation on the drilling rate is mainly manifested in the degree of compaction of the formation. As the depth of the formation increases, the degree of compaction of the formation rock will also increase, and if the formation has good diagenesis, the ROP will be reduced. In addition, the strata are deposited in different environments, and its drillability will also vary greatly.

For conglomerate formations, if a cone bit is used, the ROP will be lower than that of sandstone formations due to the weak fragmentation of the gravel and the heterogeneity of the formation. In addition, for higher than mudstone formations with the same buried depth, the calcareous cementation of the formation will also have a serious impact on the drillability and ROP of the formation.

Injection drilling is widely used in oil and gas exploration and development, which greatly improves the drilling speed. In recent years, there has not been much progress in drilling equipment and drilling technology, although there is.

Ring. People, the production technology of workers is rusty or skilled? Is there a strong desire to work? Li Grip.

Is the machine advanced and 100% operational?

materials, whether the raw and auxiliary materials required for production are sufficient, whether they can be delivered to the production line in time, and whether there are any quality problems?

The production process and operation method are the most reasonable and efficient ways to stop without disturbing Hu?

Is the temperature, humidity, airflow, and dust in the production workshop under control?

1. Transition curve interference. Transition curve interference is the interference at the transition curve between the top of the gear and the root of the gear matched with it during the meshing process of the gear.

Second, the tooth profile overlaps and interferes. In fact, the overlapping interference of the tooth profile is very easy to deal with. As long as the two tooth profiles of any gear in the meshing position do not intersect in their working sections.

3. The maximum meshing depth of the gear is less than a specified value. If the maximum meshing depth of the gear is less than its own specified value during the meshing process, the bearing capacity of the transmission equipment will be weakened. As long as we expand the meshing interval appropriately, but not less than a certain specified value of its own, then this influencing factor will not have much impact.

The transmission belt is sleeved on the driving pulley 1 and the driven pulley 2, and a certain tensioning force is applied to the belt, and positive pressure can be generated between the contact surface of the belt and the pulley; When the driving wheel rotates, it relies on the friction between the belt and the pulley to drive the driven wheel to rotate. The basic principle of belt drive is to rely on the friction between the belt and pulley to transmit motion and power.

The mechanical properties commonly mentioned are: elasticity, plasticity, stiffness, strength, hardness, impact toughness, fatigue strength and fracture toughness.

1. Design accuracy, processing accuracy, assembly accuracy.

2. Design status.

3. Processing technology.

4. Workpiece material.

5. The conformity of heat treatment to product materials and usage.

6. The operator's skills and sense of responsibility.

Man, machine, material, method, environment.

Operator factor.

equipment factors.

material factor.

Factors of processing methods.

Factors of the operating environment.

Factors affecting mechanical properties include temperature, deformation rate, degree of heat treatment, material defects, etc.

shenshenshenxz answers more than recommended answers.

1. Sliding loss.

When the friction belt drive is working, the elastic sliding is formed due to the tensile force difference on both sides of the pulley and the corresponding deformation difference, resulting in the speed loss of the belt and the driven pulley. The elastic slip rate is usually between 1% and 2%.

Severe sliding, especially overload slippage, will make the movement of the belt in an unstable state, the efficiency will be sharply reduced, the wear will be aggravated, and the life of the belt will be seriously affected. The sliding loss increases with the increase of the tensile force difference between the tight and loose edges, and decreases with the increase of the elastic modulus of the strip body.

2. Internal friction loss.

The repeated expansion and contraction of the belt during operation and the deflection on the pulley will cause friction inside the belt body and cause power loss. The internal friction loss increases with the increase of the ratio of preload and belt thickness to pulley diameter. Reducing the tensile force change of the belt can reduce its internal friction loss.

3. The adhesion between the belt and the working surface of the pulley and the side friction loss of the V-belt wedged into and out of the wheel groove.

4. Loss of air resistance.

Power loss caused by operating wind resistance at high speeds. Its loss is proportional to the square of the velocity. Therefore, when designing high-speed belt transmission, the surface area of the belt should be reduced, and thick and narrow belts should be used as much as possible; The spoke surface of the pulley should be smooth (e.g. with elliptical spokes) or with spoke plates to reduce wind resistance.

5. Bearing friction loss.

The bearing is affected by the tensile force, which is one of the important factors causing power loss.

There are many factors affecting the efficiency of belt transmission, including elastic sliding loss, bending loss, mechanical loss, air damping loss, etc., among which elastic sliding and bending have the greatest impact.

The machining accuracy of the pulley and the circular runout, the assembly factors of the pulley and the power take-off, the tension of the belt, including the transmission ratio factor.

Thread Parameter ErrorAmong the parameter errors of threads, the main factors that affect the transmission accuracy are the pitch error, the middle diameter error and the half-angle error of the tooth shape. In order to improve the transmission accuracy, these errors should be reduced or eliminated as much as possible. It can be achieved by improving the manufacturing accuracy of the spiral sub parts, but simply improving the manufacturing accuracy will increase the cost.

Therefore, for precision screw transmission with high transmission accuracy requirements, in addition to the reasonable manufacturing accuracy stipulated according to the relevant standards or specific conditions, some structural measures can be taken to improve its transmission accuracy. Because the pitch error of the screw rod is the most important factor causing the spiral transmission error, the pitch error correction device is one of the effective measures to improve the accuracy of the spiral transmission.

The main factors affecting the bearing capacity of the belt drive are the linear speed limit of the belt, the speed can not be too high), the width of the belt (if it is a V-belt drive, the number of belts). If the linear speed is too high, the belt will cause friction, overheating, relaxation, or even burning. The increase in the number of belts is equivalent to increasing the friction area of the belt, which is equivalent to increasing the friction force.

Belt drive, the most feared is friction loss. It is commonly known as "lost speed". The reason why the belt drive is usually placed on the high-speed stage of the machine is because the torque is small at the high speed transmission, and the tensile force on the belt is relatively small.

At low speed, the torque is very large, and the belt will bear a large tensile force, which is equivalent to an increase in friction, and the belt is easy to heat up and fail. Therefore, the more scientific method is to place the belt drive on the high-speed stage of the machine.

1) Simple structure, convenient operation, high degree of automation CNC machine tools need to automatically complete the control of feed speed, spindle speed, tool movement trajectory and other machine tool auxiliary functions (such as automatic tool change, automatic cooling, etc.) according to the instructions of the CNC system.

2) High static and dynamic stiffness and good vibration resistance.

3) The use of high-efficiency, high-precision backlash-free transmission device CNC machine tools for high-speed, high-precision processing.

The factors that affect the mechanical rotation and the smoothness of the transmission must be related to the speed of the conveyor belt.

The usefulness is still relatively smooth. I feel that there are still a lot of movements that affect the machinery.

What are the transmission factors that affect the smoothness of the transmission motion of the mechanical transmission, and verify that magnesium should be a platform and its starter.

There are many factors that affect the smoothness of the transmission motion of a mechanical transmission, such as its external temperature and humidity.