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Thread of drill pipes

Thread of drill pipes

Are you interested in threading on drill pipes from the supplier Avek Globe? We guarantee high quality products and a large selection of rolled metal products with worldwide delivery.

general information

Threaded sections and joints are present on the following types of drill pipes:

Drill pipes of increased length;

Weighted drill pipes;

Connecting elements;

Auxiliary parts and stabilizers.

In all these cases a special lock tapered thread is used in accordance with GOST 28487−90.

Application area

GOST establishes all profiles and dimensions, as well as tolerance tolerances for them.

Supplier — AvekGlob Company — offers at a reasonable price from the manufacturer a diverse range of drill pipe connections that meet all technical requirements. The supplier guarantees the timely delivery of products to any address specified by the consumer.

Requirements for drill pipe connections

Regulated by the provisions and norms of TU 1324−137−0147016−01. This specification covers seamless steel pipes with broken ends and welded joints of tools.

Drill pipes with welded couplings are installed in the drill string and connected to the top cover of the kelling, as well as to the drill string and the drill bit or tool at the bottom.

Identification of connections

The symbol for the locking thread includes: the letter «Z», the diameter of the larger base of the cone of the external thread in accordance with the table (only the whole part of the size in millimeters is indicated) and the designation of this standard.

Dimensions in mm

                     
Identification of locking thread The form
your profile		     ± 0.4   alt = «GOST 28487−90 Threaded conical lock for elements of drill columns., Dimensions Tolerances (with Change No. 1)» class = doc-image v: shapes = «_ x0000_i1029">
-2.0

'alt = «GOST 28487−90 Threaded conical lock for drill string elements Profile: Dimensions Tolerances (with Change No. 1)» class = doc-image v: shapes = «_ x0000_i1030">

± 0.6

  
+9.0		 alt = «GOST 28487−90 Threaded conical lock for elements of drill columns., Dimensions Tolerances (with Change No. 1)» class = doc-image v: shapes = «_ x0000_i1033">
З-65 IV 59,817 65.10 61.9 52.43 76 66.7 59.83 92 79
Z-66 I 60,080 66.68 63.9 47.68 76 68.3 61.42 92 79
Z-73 IV 67,767 73.05 69.8 60.38 76 74.6 67.78 92 79
Z-76 I 69,605 76.20 73.4 53.95 89 77.8 70.95 105 92
Z-86 IV 80,848 86.13 82.9 71.29 89 87.7 80.86 105 92
Z-88 I 82,293 88.89 86.1 65.14 95 90.5 83.64 111 98
Z-94 IV 89,687 94.97 91.8 79.13 95 96.8 89.70 111 98
Z-101 I 94,844 101.44 98.6 77.69 95 102.8 96.19 111 98
Z-102 IV 96,723 102.00 98.8 85.00 102 103.6 96.74 118 105
Z-108 IV 103,429 108.71 105.5 89,71 114 110.3 103.44 130 117
Z-117 I 110,868 117.46 114.7 90.46 108 119.1 112.21 124 111
Z-118 IV 112,192 117.47 114.3 98.47 114 119.1 112.20 130 117
Z-121 I 115,113 121.71 118.9 96.21 102 123.8 116.46 118 105
Z-122 IV 117,500 122.78 119.6 103.78 114 124.6 117.51 130 117
З-133 IV 128,059 133.34 130.1 114.34 114 134.9 128.07 130 117
Z-140 II 132,944 140.20 137.4 110.20 120 141.7 133.63 136 123
Z-147 III 142,011 147.95 145.1 126.78 127 150.0 141.36 143 130
Z-149 V 142,646 149.24 144.9 117.49 127 150.8 143,99 143 130
Z-152 III 146,248 152.19 149.4 131.02 127 154.0 145.60 143 130
Z-161 III 155,981 161,92 159.1 140.75 127 163.8 155.33 143 130
Z-163 V 156,921 163.52 159.2 128.52 140 165.1 158.26 156 143
Z-171 III 165,598 171.54 168.7 150.37 127 173.8 164.95 143 130
Z-177 II 170,549 177,80 175.0 144.55 133 180.2 171.23 149 136
Z-185 V 179.146 185,74 181.4 147.74 152 187.3 180.49 168 155
Z-189 III 183,488 189.43 186.6 168.26 127 192.0 182.84 143 130
Z-201 II 194,731 201.98 199.2 167.98 136 204.4 195,42 152 139
З-203 V 196,621 203.22 198.8 161.97 165 204.8 197.96 181 168

Tolerances and accuracy

The maximum deviation of the locking thread parameters should not exceed the following values:

  step on the thread length of 25.4 mm between any two threads, mm ± 0.05
  step on the entire length of the thread, mm ± 0.11
  angle of inclination of side profile 30 ° ± 30 '
  conicity on the length of the cone 100 mm:  
  external and average diameter of external thread, mm +0.25
  inner and middle diameter of internal thread, mm -0.25
  radius of curvature of the vertices of the thread profile, mm +0.2

The roughness parameters of the surface of the Rz thread must not be more than 3.2 μm.

Supplier — AvekGlob Company — offers to purchase joints to drill pipes in the assortment that meet the technical requirements. Products can be bought at a price formed on the basis of European and world standards of production. Implementation is possible in bulk and retail, for regular customers, a flexible system of discounts operates.