drill stem

Check the specification of drill stem, measure its length and that of surface casing.

This method can be used for reference in drill stem design and surface equipment selection.

Develop drilling programs, select sites and specify drilling fluids, bit selection, drill stem testing procedures and equipment.

A drill stem test performed in an open hole section of the wellbore.

This paper introduces a calculation method of friction force acted on drill stem at different conditions in horizontal well.

Then a new drill stem is used for the new hole section, and also cemented in place.

To use special taper mud filter screen can reduce greatly wash degree to the inner wall of drill stem.

To abide by strictly correct operating regulation can avoid the drill stem washout and failure caused by incorrect operations.

The use of drill-stem testing (DST), particularly in offshore environments, has seen a marked decline in recent years.

Drill stem test equipment and services, if required.

In the mining rig operations, the drill stem serves a dual purpose.

In order to enhance the service hfe of hollow steel for rock drill stem, the odd number side section shape hollow steel has been designed.

Pick up drill stem test tool .

deep well; drill stem failure; support vector machine; clustering analysis; failure reasons; precautionary measures;

Technics Study of Laser Transformation Hardening on the Drill-Stem Joint Material

Predicting Fatigue Life in Consideration of Drill Stem Movement Behaviours

Progress of A Downhole Drill-stem Tester Techniques and Suggestions

Development of Recommended Practices for Drill Stem Components Used in Critical Sour Service Drilling

Petroleum and natural gas industries; drilling and production equipment; drill stem design and operating limits

Communication of information from surface to downhole by sensors sensitive to the vibration of drill stem

New work item proposal: Recommended practice for design and operating limits of drill stem of aluminium drill string

Study and Application of Combination Technology of Fracture Drill Stem and Hydraulic Flowing Back

Drill Stem Dynamics Analysis and Application in Sidetracked Horizontal Wells

Design of a Special Machine Tool for Taper Thread of Drill Stem

Analysis of influence factor on accuracy of drill stem testing data interpretation

Automated centering system for drill stem friction welding machine

The calculation of critical compressive force of drill stem in horizontal well

Dynamic simulation of the contact between drill stem and well wall

Application of laser rigidification technique in strengthening drill stem joint

An Analysis of the Lateral Force between Casing String and Drill Stem

Analysis of Torsional Stress of Drill Stem Double Shoulder Connector

The analysis of buckling load of the horizontal drill stem

Failure analysis of drill stem bracket on rotating drill machine

Specification for Rotary Drill Stem Elements

The Research of Using Drill Stem as Antenna in Telemetering System of Well-drilling

Failure Analysis on Fracture of Drill-stem Subs

Development of the Flexible Drill Stem

The Merit of Inner- sprayed Drill Stem in View of Applied Effect