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HWDP

Heavy weight drill pipe (HWDP) is an intermediate-weight drill string component with thicker walls and longer tool joints than standard drill pipe. This three-point wall contact design allows for higher RPM drilling with reduced torque and permits drilling through directional changes with less connection and fatigue issues. Today, BHAs often utilize HWDP between drill collars and drill pipe to minimize drill collar count and comprise most of the available weight on bit.

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189 views7 pages

HWDP

Heavy weight drill pipe (HWDP) is an intermediate-weight drill string component with thicker walls and longer tool joints than standard drill pipe. This three-point wall contact design allows for higher RPM drilling with reduced torque and permits drilling through directional changes with less connection and fatigue issues. Today, BHAs often utilize HWDP between drill collars and drill pipe to minimize drill collar count and comprise most of the available weight on bit.

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17.

Heavy Weight Drill Pipe (HWDP)

HWDP is an intermediate-weight drill string member with drill pipe dimensions for
easier handling. Its heavy wall tube is attached to special extra-length tool joints.
These provide ample space for recutting the connections and reduce the rate of wear
on the OD.
A joint of HWDP has a greater wall thickness and longer tool joints than normal drill
pipe. Midway between the tool joints is an integral wear pad which acts as a
stabilizer.

HWDP is less rigid than DCs and has much less wall contact.CHANCES of
differential sticking are reduced.

Its three-point wall contact feature solves two serious problems in directional drilling :
It permits high-RPM drilling with reduced torque. HWDP can be run through
hole angle and direction changes with less connection and fatigue problems.

Today, the trend in BHA design is to minimize the number of DCs in the BHA and use
HWDP to comprise a major portion of available weight on bit.

Note: Heavy Weight Drill Pipe should not be used as bit weight in vertical
holes larger than those listed in the table below.

The BHA in a directional well may have 20 or more joints of HWDPbetween the drill
collars and drill pipe.

Figure below shows the HWDP Dimensional Data Range :

(All dimensions are given in inches)


Spiral Heavy Weight Drill Pipe

Processing of Heavy Weight Drill Pipes :


(click on the image to get high resolution preview of the image)
Heavy Weight Drill Pipe Material :
Posted by Deepak Choudhary at 12:00:00 PM

http://directionaldrilling.blogspot.com/2011/07/heavy-weight-drill-pipe-hwdp.html

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