Grant Prideco offers three types of heavy weight drill pipe: Standard, Tri-Spiral™, and Spiral-Wate™. Each of these heavy weight drill pipe designs is available in different material grades for standard or critical service conditions.
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Standard HWDP was developed to provide a gradual transition from heavy drill collars to relatively lightweight drill pipe.
This intermediate-weight pipe has a wall thickness of approximately 1 in. and helps prevent stress concentration at the top of the drill collar section. Heavy weight drill pipe also enables drilling at higher RPMs, reducing torque and differential pressure sticking.
Heavy weight drill pipe is well-suited for directional drilling applications. Because it bends easily, heavy weight drill pipe simplifies directional control and minimizes connection fatigue problems that are common in high-angle or horizontal drilling.
For extended reach and horizontal wells, high-strength heavy weight drill pipe is often used high in the hole to apply weight on the bit. This is especially true for wells in which the total vertical depth to total measured depth ratio is low.
Grant Prideco developed Tri-Spiral HWDP for applications such as extended reach and horizontal drilling, and it is well-suited for wells requiring additional hole cleaning and buckling resistance.
Severe bending stresses and hole-wall contact are reduced by three spiral upsets that are equally spaced between tool joints. The upset design helps increase buckling resistance, reduce differential sticking, and reduce torque and drag. Spiraling the upsets also helps move the cuttings off the low side of the hole for better hole cleaning.
Grant Prideco’s Spiral-Wate HWDP saves time and reduces drilling costs, especially in tough drilling environments. Spiral-Wate is designed to handle maximum stress.
Intermediate drill string components are constantly subjected to some of the most severe tasks in drilling today. The critical transition zone between stiff, heavy drill collars (under compression) and the light, more flexible drill pipe (in tension) can be too much for conventional heavy-wall drill pipe to handle.
The unique, patented design of Spiral-Wate reduces differential sticking problems, minimizes wear, and improves circulation. Precision tool joint alignment reduces excessive tool joint wear, resulting in longer service life and reduced fatigue.
A Heavy Weight Drill Pipe (HWDP) looks like a normal drill pipe except for an upset centered along the tube which helps to prevent excessive buckling.
HWDP is used as a transitional stiffness section, typically between the stiff and rigid drill collars and the relatively light and flexible drill pipe joints to reduce fatigue failures directly above the bottom hole assembly.
Its wall thickness is up to 3 times that of a similar-sized normal drill pipe to add additional weight to the bit.
HWDP is used most commonly in directional drilling because it bends more easily and helps to control torque and fatigue in high-angle operations.
HWDP is manufactured in accordance with API Spec. 7/7-1 guidelines.
HWDP Specifications
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Conventional Heavy Weight Drill Pipes come in two configurations, Welded and Integral.
The welded configuration is manufactured by friction welding of extra long tool joints to a thick well tube while the integral configuration is machined from a solid bar of AISI4145H alloy steel.
An additional option is the Heavyweight Spiral Drill Pipe, which has spiral grooves cut into the external surface for reduced differential sticking and improved hole-cleaning.
Products are manufactured to API Spec.7/ 7-1 where applicable and can come customized with additional features and proprietary connections of leading manufacturers per your requirements.
Contact us to discuss your requirements.
API Bore Back Box Connection
API Stress Relief Grooved Pin
Cold Rolled Thread Roots
Phosphate coated connections
OptionsInternal Plastic Coating
Hardband Type especially on box and pin tool joint
Proprietary Connections
Make and Break Test
ProtectionPressed steel thread protectors
Mill Test CertificatesIssued in accordance with API Spec 7/7-1 and API RP7G .
Third Party Inspection can be performed on request at buyer’s care and expense.
Grant Prideco offers three types of heavy weight drill pipe: Standard, Tri-Spiral™, and Spiral-Wate™. Each of these heavy weight drill pipe designs is available in different material grades for standard or critical service conditions.
Standard HWDP was developed to provide a gradual transition from heavy drill collars to relatively lightweight drill pipe.
This intermediate-weight pipe has a wall thickness of approximately 1 in. and helps prevent stress concentration at the top of the drill collar section. Heavy weight drill pipe also enables drilling at higher RPMs, reducing torque and differential pressure sticking.
Heavy weight drill pipe is well-suited for directional drilling applications. Because it bends easily, heavy weight drill pipe simplifies directional control and minimizes connection fatigue problems that are common in high-angle or horizontal drilling.
For extended reach and horizontal wells, high-strength heavy weight drill pipe is often used high in the hole to apply weight on the bit. This is especially true for wells in which the total vertical depth to total measured depth ratio is low.
Grant Prideco developed Tri-Spiral HWDP for applications such as extended reach and horizontal drilling, and it is well-suited for wells requiring additional hole cleaning and buckling resistance.
Severe bending stresses and hole-wall contact are reduced by three spiral upsets that are equally spaced between tool joints. The upset design helps increase buckling resistance, reduce differential sticking, and reduce torque and drag. Spiraling the upsets also helps move the cuttings off the low side of the hole for better hole cleaning.
Grant Prideco’s Spiral-Wate HWDP saves time and reduces drilling costs, especially in tough drilling environments. Spiral-Wate is designed to handle maximum stress.
Intermediate drill string components are constantly subjected to some of the most severe tasks in drilling today. The critical transition zone between stiff, heavy drill collars (under compression) and the light, more flexible drill pipe (in tension) can be too much for conventional heavy-wall drill pipe to handle.
The unique, patented design of Spiral-Wate reduces differential sticking problems, minimizes wear, and improves circulation. Precision tool joint alignment reduces excessive tool joint wear, resulting in longer service life and reduced fatigue.
A Heavy Weight Drill Pipe (HWDP) looks like a normal drill pipe except for an upset centered along the tube which helps to prevent excessive buckling.
HWDP is used as a transitional stiffness section, typically between the stiff and rigid drill collars and the relatively light and flexible drill pipe joints to reduce fatigue failures directly above the bottom hole assembly.
Its wall thickness is up to 3 times that of a similar-sized normal drill pipe to add additional weight to the bit.
HWDP is used most commonly in directional drilling because it bends more easily and helps to control torque and fatigue in high-angle operations.
HWDP is manufactured in accordance with API Spec. 7/7-1 guidelines.
HWDP Specifications
Conventional Heavy Weight Drill Pipes come in two configurations, Welded and Integral.
The welded configuration is manufactured by friction welding of extra long tool joints to a thick well tube while the integral configuration is machined from a solid bar of AISI4145H alloy steel.
An additional option is the Heavyweight Spiral Drill Pipe, which has spiral grooves cut into the external surface for reduced differential sticking and improved hole-cleaning.
Products are manufactured to API Spec.7/ 7-1 where applicable and can come customized with additional features and proprietary connections of leading manufacturers per your requirements.
Contact us to discuss your requirements.
API Bore Back Box Connection
API Stress Relief Grooved Pin
Cold Rolled Thread Roots
Phosphate coated connections
OptionsInternal Plastic Coating
Hardband Type especially on box and pin tool joint
Proprietary Connections
Make and Break Test
ProtectionPressed steel thread protectors
Mill Test CertificatesIssued in accordance with API Spec 7/7-1 and API RP7G .
Third Party Inspection can be performed on request at buyer’s care and expense.