The SJ type double way bumper is a kind of double-way shock absorbing tool that used to simultaneously slow down or eliminate the vertically or horizontally shock from drill string. It can reduce the damage due to shocking to drill bit, drilling tool and surface drilling tool so that the purpose of raising drilling speed and of reducing drilling cost shall be reached.

TJ Type One-way shock absorber is one kind of drilling tool that effects shock absorption by depending on hydraulic oil under external force through elastic deformation and damping. With some features of simple construction, easy and reliable operation, it can fully overcome the impact and shocking load from drill strings during drilling operation. Taking use of the shock absorber, it can raise the service life for drill bit and drill tool, speed up drilling, get rid of drilling jumping, well protect surface equipments and drilling tools.

The FFWL type float valve stabilizer is a necessary tool in petroleum exploration and drilling engineering. The float valve stabilizer is connected at upper part of drill bit, and the float valve assembly in stabilizer is near the bit connecting thread and the float valve stabilizer also can be connected to the necessary position of drill string.

The non-rotating stabilizer, also called rubber sleeve stabilizer, is a special tool in drilling to avoid blade wear and wall damage.

The inside BOP, i.e. blowout preventer, is the necessary tool assigned by the IADC in drilling operations. When the blowout is happeded during drilling tools are coming out of hole, the inside blowout preventer is needed. Because the drill pipes as much as possible shall be put into hole again.
Our inside blowout preventer is the newly developed ones that has been used to substitute import product and being used in some gig oilfields in China. After testing and use by the customers, it has been fully proved that the features and construction for the products has caught up the international levels.

The type FT drop-in check valve is an inside blowout preventer in the drill string. This drop-in check valve is simple in structure and easy to operate. When blowout is going to be happened, the thread connections of the Kelly are screwed out immediately and the back pressure valve is put into the I.D. of drill pipe and then pumped downward to the required place. Thus the blowout accident can be prevented.
The tool is consisting of landing sub and check valve assembly. The landing is thread connected with stop ring and tightened on and put into downhole with drill string. The landing sub is used as a sub above string b efore check valve is run in downhole.

The Kelly splash-proof valve is a necessary tool preventing fluid flowing from Kelly to drill floor and keeping the operating environment from being contaminated by fluid when making a connection or Kelly is taken out of hole and discharged off.

The Kelly cock valve is a manually operated ball valve run in the I.D. of drill string. It is an effective tool for preventation from blowout. The Kelly cock valve is divided into upper Kelly cock valve and lower Kelly cock valve. The upper Kelly cock valve is connected between lower end of swivel and upper end of Kelly. The lower Kelly cock valve is connected between upper end of drillpipe and lower end of Kelly saver subs. The Kelly cock valve features a simple operation, and can be opened on or closed off by only turning the special operating spanner at 90 degrees according to indicating direction. During drilling operation, in order to avoid serious well kick or blowout accident, the Kelly cock valve shall be connected at upper end and lower end of Kelly.

The circulating sub is a specialized tool for circulating drilling fluid when running in casing on the way or finishing running casing downhole. According to actual need, there are circulating sub with casing thread and circulating sub with union thread.