other
HOT PRODUCT
  • Eccentric Rotating Wellhead & X-Mas Tree
    Eccentric Rotating Wellhead & X-Mas Tree

    RockySea Petro Eccentric Rotating Wellhead & X-Mas TreeFull support on your customised requirementThe strictest quality standards on Eccentric rotating wellhead and X-mas tree25 years Eccentric rotating wellhead and X-mas tree manufacturing experienceRockySea Petro Petro manufactures Eccentric rotating wellhead and X-mas tree in China. We have our own factory ofEccentric rotating wellhead and X-mas tree. RockySea Petro Petro provide the high quality and competitive price on Eccentric rotating wellhead and X-mas tree

    VIEW DETAILS
  • Large Displacement Tubing Pump
    Large Displacement Tubing Pump

    ‌RockySea Petro Large Displacement Tubing PumpNote: if our client needs different specifications and models of special oil well pump, we can also design and manufacture according to the parameters and requirements provided by the client.These special oil well pumps have novel structure, reliable performance, superior pump efficiency, and long service life, and have been widely used in various oilfields.RockySea Petro has developed a series of special oil well pumps suitable for different well conditions.Bas

    VIEW DETAILS
  • Coated Sucker Rod
    Coated Sucker Rod

    RockySea Petro Coated Sucker RodWith the increase of working time, conventional sucker rods are prone to corrosion and eccentric wear during operation, and are not suitable for harsh working conditions. In 2012, RockySea Petro developed a fully coated sucker rod. By using HDPE resin to fully coat the sucker rod body, the anti-corrosion and anti-abrasion of the sucker rod is realized. And this tech of RockySea Petro has gained patent in China, Canada and the United States.Description It is the ideal matching

    VIEW DETAILS
  • Sand Well Recovery Sucker Rod Pump
    Sand Well Recovery Sucker Rod Pump

    ‌RockySea Petro Sand Well Recovery Sucker Rod PumpAnti-sand pump for heavy oil.Isodiametric-plunger pump.Sand-scraping pumpLong plunger and sand stuck prevention pumpB type anti-sand centralizing sucker rod pump.For now, there are a few technologies about how to solve the sand problem during oil recovery production, like adopting a hydraulic jet pump to flush out sand, mechanical anti-sand technology, and chemical anti-sand technology. Now you can take a look at sanJack’s sand control sucker rod pu

    VIEW DETAILS
  • Drilling Stabilizer
    Drilling Stabilizer

    ‌RockySea Petro Drilling StabilizerDatasheetFunctionControl wellbore trajectory: The stabilizer mainly plays a guiding and stabilizing role in the drilling tool assembly. The installation position of the stabilizer controls the wellbore inclination angle and curvature within the specified range, and also concentrates the majority of the weight of the drill collar on the drill bit, reducing the non wellbore center force and other external forces borne by the drill string and drill bit. With the d

    VIEW DETAILS

Spiral Drilling Collar

Date:2024-05-05 Popularity:280

RockySea Petro Spiral Drill Collar




In directional drilling, due to the large deviated well and the large contact area between the drill collar and the borehole wall, problems like sticking and jamming are more likely to happen. The spiral drill collar reduces the contact area between the drill collar and the borehole wall, so it is widely used. Spiral drill collars are not listed in intl standards, but due to its practical value, many manufacturers have produced them.


Description 

The function of the spiral drill collar is to reduce the occurrence of sticking and sticking. Three right-hand spiral grooves are machined on the outer cylinder of its circular drill collar. A 305-560mm section of the circular drill collar without grooves is reserved at the external thread joint and 475-610mm section of the internal thread end joint. Its weight is 4% less than that of the circular drill collar of the same size. RockySea Petro has rich experience in R & D, production and sales of spiral drill collars to all over the world for more than 20 years old.

Types and Structure 

There are many kinds of spiral drill pipes manufactured by SanJack. Take the most commonly used BI and BII as examples.

BII type: This type of drill collar has three spiral grooves, which are right-handed and evenly distributed. External contour curve equation:. Where: ρ— Pole diameter; θ— Polar angle; R – radius; E-coefficient. Outer diameter 171.5 mm (6 3 / 4 inch); The maximum cutting depth is 7.1mm; Lead 1000 ± 25.4 mm.



BI type: 
This type of drill collar has three spiral grooves and is distributed in right-hand rotation. Outer diameter: 165.1mm ~ 177.8mm (6 1 / 2 ~ 7 inches); Cutting depth: 7.9 ± 1.59mm; Lead: 1168 ± 25.4 mm.





Features 

Country of Origin: China

Nominal OD: 4 3/4” (4.750”) to 9” 1/2” (8.500”)

Nominal ID: 2.250” to 3” (3.000”)

Material Grade: AISI 4145H Modified

Nominal Weight: 45.00# to 144#

Nominal Wall Thickness: 3.250”

Drift Size: 2.125” to 2.875”

Manufacturing Criteria:  NS-1

Relevant tool joint Parameters

Connection: NC38,  Regular, REG

Bend Stress Ratio: 1.920 to 3.061

OD: 4 3/4” (4.750”) to 9”1/2” (9.500”)

ID: 2.563” to 3” (3.000”)


Application

  • Spiral drill collars can help to control the direction of the bottom hole assembly, avoiding the problem of hole deviation and enhancing the performance of drilling.
  • The presence of the spiral drill collars allows the pipelines to stay in the tensile state, while guarantees the rigidity of the drill string under great compression. Thus, the drill efficiency and quality are greatly improved.
  • Apart from providing weight on the bit (WOB), spiral drill collars also work as a shock absorber to dampen the vibration and shaking when drilling takes place. In this way, the drilling process can be carried out in a much steadier state.
  • Due to the structural features, spiral drill collars can provide weight for drilling purpose. Gravity works on a number of drill collars to offer enough downward force needed to break rocks with the drill bit.


RockySea Petro Copyright © 2008-2024 Inc. SITEMAP