· Difference of the thread structure (datum mark-All products);

· Difference ofhardness test position (NS-1 increase full cross section hardness test-all products);

·Cold rolling requirements (the clear requirements of the thread and stress-reducing groove for cold rolling treatment, and drill collar hanging cards, slips root fillet of the rolling requirementsinNS-1-all products);

· The difference of impact work (part of the product requirements under low temperature -20℃ conditions test of NS-1 );

· The difference of wall thickness difference (The requirement of full length wall thickness difference and both ends wall thickness difference in NS-1 );

· Product marking groove type and position requirements;

· Requirements for specific dimensions of wear-resistant belt welding type;

· Other recommended requirements.

Anomaly 1: Pressure of gauge rises suddenly.

Possible causes: motor stall, motor drive shaft card dead, or bit plugged blocked

Methods of judgment and treatment:Motor stall:Rise the drilling tool 0.3-0.6m, checks the cyclic pressure, gradually adds the drilling pressure, the pressure gauge along with it gradually rises, if all is normal, may confirm is the stall.Motor drive shaft card dead, or bit plugged blocked:The pressure gauge readings are still high when the drill is raised off the bottom, and only the drill tool can be inspected or replaced.

Anomaly 2: Pressure goes slow down

Possible causes: Cyclic pressure loss changes, drill pipe damage

Judgment and treatment method: Check the drilling fluid flow rate, rise drill toola little, if the pressure gauge reading is still lower than the circulation pressure, put forward the borehole inspection.

Anomaly 3: No footage

Possible causes: Formation change, motor stall, by-pass valve in "open position", Cardan shaft damage, bit damage.

Judgment and treatment method: Changes the drilling pressureand cyclic flow appropriately (must be in the allowable position).The pressure gauge readings are high,lift drill tool off bottom, check cyclic pressure,starting from small drill pressure, increase drilling pressure gradually .The pressure gauge readings are low,rise drill toola little, start and stop drilling pump two times if it is still invalid, you need to put forward the hole, replace the check bypass valve.Pressure fluctuations often, rise drill toola little, pressure fluctuation range smaller, should take drilling tools out, check replacement, or replace a new drill.

According to the vibration-knocking tool and structure ,is  hydraulic and mechanical in terms of its structure.

Their common features are:

Can circulate the drilling fluid, the center must have the circulation drilling fluid the channel;

Can transmit the torque, the heart axis and the outer cylinder can not have the circumferential movement;

High-strength sealing, internal liquid can not be leaked, external liquid can not be infiltrated;

There is a storage mechanism, can be stretched or compression of the elastic can accumulate, and then suddenly release, resulting in high-speed movement;

A striking couple, i.e. an impact body and a bearing body, are composed of a pair of conflicting couples;

To have a connecting mechanism, because it is connected in the middle of the drill string to work, so the upper and lower parts must have the thread connected with the drill string.

Normal drilling, with drilling shock device working time to meet the requirements below, should be recycled repair.

Temperature above 190 ℃, work 240 hours;

Temperature for (150~190) ℃, work 500 hours;

1.3 Temperature below 150 ℃, work 720 hours;

Normal drilling, while drilling shock device does not meet the specified time, but the heavy shock operation or drilling found that there is bending deformation, both ends of the thread does not meet the relevant provisions, should be recovered and repaired.

The diameter of the drilling device is worn out, and the outside diameter of the inner whorl is expanded larger than the following table, and shall be scrapped

Specifications（MM）：                                                             121      159      165      197       203

OD Wear（mm）:                                                                       3.17     4.76     4.76     6.35      9.33

Outer diameter expansion of internal thread（mm）:                 1        1.2       1.2      1.5        1.5

When the axial bending deformation of the drilling hammer exceeds the 1.5°, it should be scrapped.

When the depth of the outer cylinder of the drilling hammer exceeds 2mm, it should be scrapped.

The body and mandrel of the drilling shock can no longer be repaired and should be scrapped.