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Worker technical service

Sand Control technology:


1,Open Hole Completion

-The High Quality Screen Hanging in Open Hole Horizontal Well 

Technology Characteristics

* 1.Suitable for simple screen hanging, Does’t require gravel packing wells.

* 2.Can be recycled from the bottom of the string, Easy to clean and mud displacement.

* 3. After set packer , Adopted by the program that shearout ball seat, Ensure the integrated channel is of the string, To prevent the suction and reduce formation leakage.

* 4. Adopt protective seat sealing hole operation scheme,  Hang packer not influence by the pressure of well flushing .


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2,Open hole completion horizontal well gravel packing 

1、Positive replace viscosity breaker liquid

2、Reversing position

3、Packing position

4、Acid pickling drill pipe

5、Lift check seal

6、Pitching ball setting

7、Run in position


2、Open Hole Completion

- Horizontal well gravel pack(Top filling)

Technological Characteristics

*  Horizontal wells open hole gravel pack.

*  Conventional packing way , be filled by the scale sleeve of the packer assembly.

 * In the process of drilling, ensure full bore string, can be direct flushing and mud displacement.

* Pitching ball setting , packing , without the ball washing  perations.

* Ensure that all operation stage, hydrostatic column pressure effect on the formation, ensure borehole face stability.

* Can classify sand fall out, avoid filling pressure is too high , can be performed the operation of long horizontal section.

 * After filling can be direct circulation for cleaning fluid.

 * All sealed construction are made of a metal seal, no downhole hand down seals.

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3, open hole completion - Horizontal Well gravel packing (bottom filling) 

Technological Characteristics

1.Horizontal wells open hole gravel pack.

2.Enables bottom filling, Overcome the top filling resulting from a high permeability or leakage from the roots of horizontal wells, which filling is incomplete.

3. In the process of drilling, ensure full bore string, can be direct flushing and mud displacement.

4. When pick up the bottom filling service tools, the string can be automatically shut down.

5. Tools and filling process is simple, high reliability, low risk.

6. Has been widely used in onshore oilfield.

Tool combination

1.FS type sand control packer

2.FH type sealing tool,can pressure to annulus or right hand direction sell

3. The bottom filling tools, cooperate with DC type bottom filling service tools,conduct filling

Range of application

7" casing  6" open hole、9 5/8" casing 

8.5" Gravel at the bottom of the open hole horizontal well


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4, open hole completion - Horizontal Well gravel packing 

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