Dog leg reamer can be connected in drill string and achieve a slight reaming when drilling.

The tool has two sets of upper and lower spiral reaming blades. The lower blade group is responsible for the reaming while drilling or the forward drilling during the drilling process, and the upper blade group is responsible for the back reaming during the tripping process. The main function of the tool is to reduce the severity of doglegs problem in directional wells, remove micro-doglegs and small steps in the well, in swelling shale formations and creeping salt gypsum beds, ooze rocks, coal beds and other well sections Enlarging a borehole with a diameter slightly larger than the theoretical diameter of the drill bit can reduce the time of drilling operations during conventional drilling, and ensure safe and smooth operations such as tripping, electrical testing, casing running, and expansion packer installation. In addition, the tool also has the function of clearing the cuttings bed in directional wells and effectively controlling the ECD of horizontal wells and extended reach wells.
Features:
1. A single component, no moving parts, the strength is higher than the strength of the drill pipe connected to it;
2. Connected to a drill pipe string, for most derricks, it does not affect the string placement and the operation of the second deck;
3. Hydraulic and mechanical double action destroys and clears the cuttings bed;
4. The double core feature can expand the hole size larger than the tool diameter;
5. The spiral blade helps to improve the stability of the drill string during operation;
6. The upper and lower cutting structures can achieve reaming or back reaming;
7. It can be used for hole workover before electrical survey, casing running, expansion packer running, etc.;
8. Minimize or eliminate micro dogleg problem;
9. Reduce the reaming time and pass times.

 The Dog Leg (DL) Reamer tool, designed for maximum toughness, has an eccentric shape that allows it to drill larger holes than it passes through. The tool enlarges the wellbore, saving you time-consuming short trips.

API Drilling Chinese Downhole Drilling Mud Motor is a kind of downhole drilling tool powered by mud. The mud from mud pump enters motor by way of bypass valve, and a pressure drop between motor inlet and outlet created, such pressure drop will drive the motor rotator to rotate, and transmit the torque and rotary speed to bit by universal shaft and transmission shaft. The downhole motor property mainly depends upon its property parameters. This product uses the high and new technology of coating to avoid coating off of rotors resulted from the traditional technology. Its strength and life are greatly improved. It is applicable to Horizontal Directional Drilling, composite drilling, cluster wells, sidetrack wells and well workover, Coiled Tubing Operation, etc.   downhole drilling motor

Downhole motor is a type of positive- displacement downhole motor(PDM). After high pressure drilling fluid enters into downhole motor from drill stem, fluid pressure forces rotor to rotate that transfers torque to bit to achieve drilling purpose.

Various downhole motor assemblies for well size 1 7/8"~26" with 24 main dimension specifications (which are identified by outer diameter of stator) : 1-11/16", 2-1/8", 2-3/8", 2-7/8", 3-1/8", 3-1/2", 3-3/4", 4", 4-1/8", 4-3/4", 5", 5-1/4", 5-7/8", 6-1/4", 6-1/2", 6-3/4", 7-1/4", 7-3/4", 8", 8-1/4", 8-1/2", 9", 9-5/8", 11-1/4".

Structure form includes straight, single bend, double bend, angle adjustable and so on. Heat-resistant temperature range consist of 250°F (120℃) or less than 250℉ (120℃), and between 250 ℉(120℃) to 355℉ (180℃). We can also provide all specifications including oil based mud resistant motor and saturated saltwater mud resistant motor.

Outstanding Features

Various rotation rate and torque, high efficiency, wide flow range, smooth operation, easy maintenance, high reliability, long service life.

Safe Application

Adequate strength and specially designed multiple falling-off-proof devices to ensure safe drilling operation.

The ordinary downhole motor consists of the following components:

(1) Float assembly or By-pass valve assembly

(2) Rotor anti-drop assembly

(3) Power section assembly

(4) Universal shaft assembly

(5) Bearing assembly

In addition to ordinary downhole motor, the following components for special purpose are available to make up steerable downhole motor to meet various requirements of drilling operation:

(1) Directional joint

(2) Bend joint (fitted above or below by- pass

valve to make up single or double bend downhole motor)

(3) Hollow by-pass power section

(4) Fixed Bend Housing (with 0~3°fixed angle)

(5) Adjustable bend housing

(6) Housing stabilizer on bearing assembly

(7) Changeable stabilizer

 downhole drilling motor

(Some Models are here for your reference, more models and deatils pls contact us.)

(Of course, customization is also allowable, as long as you can provide detailed drawing, especially some parts like bearings.)

Each downhole mud motor is tested on the professional testing bench and the delivered downhole mud motor is 100% guarateed qualitified, then the test report will be provided to you.

Each downhole mud motor can continuously work 7~10 days with good working condition and correct operation. 

Of course, online after-sale service is also available at any time. 

Power Section: 

Anti-dropping Device

Ball Drive Universal Shaft Assy

ABH Assy

Driveshaft Mandrel                                                                                   Finished TC Radial Bearing

Finished Housing                                                                    Transmission Shaft Assy

Power Section Testing Bench                                                                   Downhole Motor Testing Bench