Workover Tools | Drilling-Milling-Milling Class | Positive Displacement Motor

1. Applications

Powered by hydraulic pressure, the PDM drives the downhole drilling assembly in rotation, enabling operations such as drilling, milling, and sidetracking.

2. Structure

The PDM primarily consists of a top sub, bypass valve [https://www.landrilloiltools.com/wellhead-equipment/], stator, rotor, coupling, water passage sub, bearing assembly, drive shaft, and bottom sub.

Image: https://www.landrilloiltools.com/uploads/%E5%9B%BE%E7%89%87162.png

3. Operating Principle

The PDM converts the energy of high-pressure fluid into mechanical energy via the interaction of the rotor and stator. High-pressure fluid enters the sealed chambers formed between the rotor and stator. The pressure differential causes the rotor to turn along the spiral channel of the stator. The rotor rotates eccentrically around the stator's axis, while simultaneously spinning clockwise on its own axis, driving the drill bit rotation.

4. Technical Specifications

Applicable standard: SY/T 5383 Positive Displacement Motor

Specification model

examples:

Image: https://www.landrilloiltools.com/uploads/%E5%9B%BE%E7%89%87233.png

* 9LZ95 times 7.0 : Outside diameter 95 mm, 9/10 lobe ratio hydraulic motor, bit nozzle pressure drop 7 MPa.
* 5LZ165 times 7.0 : Outside diameter 165 mm, 5/6 lobe ratio hydraulic motor, bit nozzle pressure drop 7.0 MPa, second design modification of straight-body PDM.
* 5LZ197 times 7.0-SWFG : Outside diameter 197 mm, 5/6 lobe ratio hydraulic motor, double-bent housing with stabilizer, hollow rotor with flow diversion, maximum operating temperature 150 degrees C, bit nozzle pressure drop 7.0 MPa.

5. Operating Procedure

(1) Assemble the BHA.

(2) Run slowly to 3-5 m above target depth, start pumps to circulate and clean the well. A running speed of 30 m/min is recommended. Fill the drill string with clean circulation fluid every 500 m of run-in.

(3) Slow lowering, then commence drilling. Weight on bit (WOB): 5-15 kN. Flow rate: 500-600 L/min.

(4) Pull out of hole (POOH).

6. Precautions

(1) Ensure the surface PDM is securely fixed during surface testing.

(2) Circulation fluid must be clean.

(3) Return fluid must be screened and desanded.

(4) The wellhead must be equipped with a self-sealing device to prevent small objects from falling into the well.

(5) Perform thorough well cleaning before changing singles and after completing drilling.

7. Maintenance and Storage

(1) After use, disassemble, clean, and inspect the tool. Replace any damaged parts. Apply lubricating oil to all components during reassembly.

(2) When cleaning the stator rubber lining, do not use steam to prevent rubber aging.

(3) Store the tool in a well-ventilated warehouse. Maintain a temperature between 10 degrees C and 25 degrees C, with humidity not exceeding 85%. Avoid direct sunlight and rain.

Contact: Jessie Zhou

Mobile/Whatsapp: +0086-18109206861

Email: energy@landrilltools.com

Media Contact
Company Name: Xi'an Landrill Oil Tools Co., Ltd.
Contact Person: Media Relations
Email:Send Email [https://www.abnewswire.com/email_contact_us.php?pr=workover-tools-drillingmillingmilling-class-positive-displacement-motor]
Country: China
Website: https://www.landrilloiltools.com/

Legal Disclaimer: Information contained on this page is provided by an independent third-party content provider. ABNewswire makes no warranties or responsibility or liability for the accuracy, content, images, videos, licenses, completeness, legality, or reliability of the information contained in this article. If you are affiliated with this article or have any complaints or copyright issues related to this article and would like it to be removed, please contact retract@swscontact.com



This release was published on openPR.