Application
Hammer downhole motor is based on the original downhole motor. By effectively throttling the drilling fluid, the drilling fluid continuously opens and closes in the motor cavity. The released fluid can push the transmission shaft of the drilling tool to the drill bit, achieving the hammering effect. This continuous reciprocating motion achieves the purpose of the drilling tool drill bit hammering the rock layer. The main hammering accessories are shown in the following figure:
Hydraulic impact hammer is the core of the downhole motor with impact function. Hydraulic impact hammers are usually connected between the upper part of the drill bit or core tube and the drill rod, drill collar, or other bottom power tools, resulting in low energy transfer losses and high efficiency (see Figure 1). The use of hydraulic impact hammers for drilling construction has the characteristics of no need for additional equipment, simple operation, wide application range, high drilling efficiency, and good drilling quality (see Figure 1).
1-Core bit 2-Core pipe 3-Hydraulic impact hummer 4-Joint 5-Drill string 6-Swivel
7-High pressure hose 8-mud settling pond 9-Riser pipe 10-Pressure gauge 11-Air room
12-Clean mud pond 13-High pressure hose 14-Mud pump 15-Shower head 16-Water suction hose
Product features
Hammer downhole motor adopts a volumetric working principle, with high energy utilization and the ability to output significant impact energy. We conduct research and development on a series of efficient impact hammers. The working principle of hydraulic impact hammers is based on the invention patents obtained, with a focus on adapting to production conditions, high efficiency, and convenience, to improve and perfect the technology of hydraulic impact hammers.
Structure: Its main components are the upper valve assembly, outer pipe, hammer assembly, power transmission seat, bit (joint), etc. (see Figure 2)
Main technologies
① The high-efficiency series hydraulic impact hammer has a simplified structure, effectively reducing the probability of moving parts getting stuck. Reducing the water cushion effect during anvil striking increases the impact energy output of the hydraulic impact hammer by 25-50% at the same input energy. At the same time, this series of hydraulic impact hammers has stable operation and easy operation.
② Through a scientifically reasonable hydraulic impact hammer diversion design, the hydraulic impact hammer has an adjustable and porous diversion structure, effectively solving the contradiction between the working pump volume of the hydraulic impact hammer and the pump volume used on the drilling site (a difference of 50%).
③ Through experiments on three different ways of consolidating the lower piston, the on-site
replacement of the lower piston, which is an important vulnerable component of hydraulic impact hammers, has been effectively solved, greatly facilitating production site use and saving costs.
④ The key components of the hydraulic impact hammer were selected from materials, heat treatment processes, and surface wear resistance processes. After multiple rounds of testing, new materials and processing methods were determined to ensure that the components have good impact resistance on the surface and the center has the necessary toughness, thereby improving overall performance; The sealing between the inner and outer pipes, as well as the high and low pressure areas of the valve hammer, adopts metal mechanical seals, which have high wear resistance and long service life;
Special Tips
The hydraulic impact hammer performs high-frequency reciprocating motion in a mud environment containing solid phases and particles. If it is not possible to drill with clean water, it is important to use high-quality mud and make good use of it. Otherwise, it will aggravate the wear and tear of the hydraulic hammer parts, affect its service life, and may also cause blockage and prevent the hydraulic hammer from working.
It is necessary to impose strict requirements on the mud: good lubrication performance, low sand content, low viscosity and specific gravity, viscosity generally not exceeding 30s, sand content not exceeding 0.5%, density 1.1g/cm3; When conditions permit, it is recommended to use slurry lubricant (GLUB) to improve the performance and extend the service life of hydraulic impact hammers. The recommended mud material is LBM with four lows (low viscosity, low shear, low density, low water loss) and one high (high lubricity).
Hammer downhole motor is based on the original downhole motor. By effectively throttling the drilling fluid, the drilling fluid continuously opens and closes in the motor cavity. The released fluid can push the transmission shaft of the drilling tool to the drill bit, achieving the hammering effect. This continuous reciprocating motion achieves the purpose of the drilling tool drill bit hammering the rock layer. The main hammering accessories (see Figure 3):
Hummer Downhole Motor technical parameters
Model | C7LZ73*7.0-DW | C7LZ89*7.0-DW | C7LZ95*7.0-DW | C7LZ120*7.0-DW | |
No. | Parameter | Value | Value | Value | Value |
1 | Lobe | 7:8 | 7:8 | 7:8 | 7:8 |
2 | Stage | 5 | 4.2 | 4.2 | 4.2 |
3 | Difference pressure MPa | 4.0 | 3.36 | 3.36 | 3.36 |
4 | Displacement L/min | ≥103 | ≥123 | ≥156 | ≥175 |
5 | Rotary speed rpm | 154～410 | 98～225 | 87～174 | 78～196 |
6 | Output torque N.m | 1252 | 1525 | 1985 | 2468 |
7 | Impact power J | 15～70 | 40～120 | 65～180 | 120～250 |
8 | Impact difference pressure MPa | 1.1～2.2 | 1.8～2.9 | 1.9～3.1 | 2.1～3.4 |
9 | Impact free stroke mm | 0～6 | 0～6 | 3～10 | 10～15 |
10 | Impact frequency Hz | 5～10 | 5～10 | 5～12 | 5～15 |
Application
Hammer downhole motor is based on the original downhole motor. By effectively throttling the drilling fluid, the drilling fluid continuously opens and closes in the motor cavity. The released fluid can push the transmission shaft of the drilling tool to the drill bit, achieving the hammering effect. This continuous reciprocating motion achieves the purpose of the drilling tool drill bit hammering the rock layer. The main hammering accessories are shown in the following figure:
Hydraulic impact hammer is the core of the downhole motor with impact function. Hydraulic impact hammers are usually connected between the upper part of the drill bit or core tube and the drill rod, drill collar, or other bottom power tools, resulting in low energy transfer losses and high efficiency (see Figure 1). The use of hydraulic impact hammers for drilling construction has the characteristics of no need for additional equipment, simple operation, wide application range, high drilling efficiency, and good drilling quality (see Figure 1).
1-Core bit 2-Core pipe 3-Hydraulic impact hummer 4-Joint 5-Drill string 6-Swivel
7-High pressure hose 8-mud settling pond 9-Riser pipe 10-Pressure gauge 11-Air room
12-Clean mud pond 13-High pressure hose 14-Mud pump 15-Shower head 16-Water suction hose
Product features
Hammer downhole motor adopts a volumetric working principle, with high energy utilization and the ability to output significant impact energy. We conduct research and development on a series of efficient impact hammers. The working principle of hydraulic impact hammers is based on the invention patents obtained, with a focus on adapting to production conditions, high efficiency, and convenience, to improve and perfect the technology of hydraulic impact hammers.
Structure: Its main components are the upper valve assembly, outer pipe, hammer assembly, power transmission seat, bit (joint), etc. (see Figure 2)
Main technologies
① The high-efficiency series hydraulic impact hammer has a simplified structure, effectively reducing the probability of moving parts getting stuck. Reducing the water cushion effect during anvil striking increases the impact energy output of the hydraulic impact hammer by 25-50% at the same input energy. At the same time, this series of hydraulic impact hammers has stable operation and easy operation.
② Through a scientifically reasonable hydraulic impact hammer diversion design, the hydraulic impact hammer has an adjustable and porous diversion structure, effectively solving the contradiction between the working pump volume of the hydraulic impact hammer and the pump volume used on the drilling site (a difference of 50%).
③ Through experiments on three different ways of consolidating the lower piston, the on-site
replacement of the lower piston, which is an important vulnerable component of hydraulic impact hammers, has been effectively solved, greatly facilitating production site use and saving costs.
④ The key components of the hydraulic impact hammer were selected from materials, heat treatment processes, and surface wear resistance processes. After multiple rounds of testing, new materials and processing methods were determined to ensure that the components have good impact resistance on the surface and the center has the necessary toughness, thereby improving overall performance; The sealing between the inner and outer pipes, as well as the high and low pressure areas of the valve hammer, adopts metal mechanical seals, which have high wear resistance and long service life;
Special Tips
The hydraulic impact hammer performs high-frequency reciprocating motion in a mud environment containing solid phases and particles. If it is not possible to drill with clean water, it is important to use high-quality mud and make good use of it. Otherwise, it will aggravate the wear and tear of the hydraulic hammer parts, affect its service life, and may also cause blockage and prevent the hydraulic hammer from working.
It is necessary to impose strict requirements on the mud: good lubrication performance, low sand content, low viscosity and specific gravity, viscosity generally not exceeding 30s, sand content not exceeding 0.5%, density 1.1g/cm3; When conditions permit, it is recommended to use slurry lubricant (GLUB) to improve the performance and extend the service life of hydraulic impact hammers. The recommended mud material is LBM with four lows (low viscosity, low shear, low density, low water loss) and one high (high lubricity).
Hammer downhole motor is based on the original downhole motor. By effectively throttling the drilling fluid, the drilling fluid continuously opens and closes in the motor cavity. The released fluid can push the transmission shaft of the drilling tool to the drill bit, achieving the hammering effect. This continuous reciprocating motion achieves the purpose of the drilling tool drill bit hammering the rock layer. The main hammering accessories (see Figure 3):
Hummer Downhole Motor technical parameters
Model | C7LZ73*7.0-DW | C7LZ89*7.0-DW | C7LZ95*7.0-DW | C7LZ120*7.0-DW | |
No. | Parameter | Value | Value | Value | Value |
1 | Lobe | 7:8 | 7:8 | 7:8 | 7:8 |
2 | Stage | 5 | 4.2 | 4.2 | 4.2 |
3 | Difference pressure MPa | 4.0 | 3.36 | 3.36 | 3.36 |
4 | Displacement L/min | ≥103 | ≥123 | ≥156 | ≥175 |
5 | Rotary speed rpm | 154～410 | 98～225 | 87～174 | 78～196 |
6 | Output torque N.m | 1252 | 1525 | 1985 | 2468 |
7 | Impact power J | 15～70 | 40～120 | 65～180 | 120～250 |
8 | Impact difference pressure MPa | 1.1～2.2 | 1.8～2.9 | 1.9～3.1 | 2.1～3.4 |
9 | Impact free stroke mm | 0～6 | 0～6 | 3～10 | 10～15 |
10 | Impact frequency Hz | 5～10 | 5～10 | 5～12 | 5～15 |
