drill collar

A drill collar is a thick-walled, heavy tubular component used in bottom hole assemblies (BHA) to: Provide weight on bit (WOB) for efficient drilling Improve wellbore stability and directional control Minimize buckling of drill pipes Serve as stiffeners for measurement tools (MWD/LWD)

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• Return Policy: <div class="return-policy"> <h2>No-Risk Return Policy</h2> <p>Not 100% satisfied? We make returns easy.</p> <div class="highlight-box"> <h3>🔄 30-Day Returns</h3> <p>Return any item in original condition within 30 days for a full refund.</p> </div> <h3>📦 How to Return:</h3> <ol> <li><strong>Contact us</strong> at returns@yourstore.com with your order number</li> <li><strong>Get approval</strong> + return shipping label (if applicable)</li> <li><strong>Ship back</strong> via prepaid method</li> </ol> <h3>❗ Important Notes:</h3> <ul> <li>Refunds exclude original shipping fees</li> <li>Customs duties on international returns are non-refundable</li> <li>Final sale items marked "Non-returnable" are excluded</li> </ul> <p>🔔 <em>Need help? Chat live with our support team → [右下角聊天图标]</em></p> </div>
  &lt;div class=&quot;return-policy&quot;&gt;<br> &lt;h2&gt;No-Risk Return Policy&lt;/h2&gt;<br> &lt;p&gt;Not 100% satisfied? We make returns easy.&lt;/p&gt;<br> <br> &lt;div class=&quot;highlight-box&quot;&gt;<br> &lt;h3&gt;🔄 30-Day Returns&lt;/h3&gt;<br> &lt;p&gt;Return any item in original condition within 30 days for a full refund.&lt;/p&gt;<br> &lt;/div&gt;<br> <br> &lt;h3&gt;📦 How to Return:&lt;/h3&gt;<br> &lt;ol&gt;<br> &lt;li&gt;&lt;strong&gt;Contact us&lt;/strong&gt; at returns@yourstore.com with your order number&lt;/li&gt;<br> &lt;li&gt;&lt;strong&gt;Get approval&lt;/strong&gt; + return shipping label (if applicable)&lt;/li&gt;<br> &lt;li&gt;&lt;strong&gt;Ship back&lt;/strong&gt; via prepaid method&lt;/li&gt;<br> &lt;/ol&gt;<br> <br> &lt;h3&gt;❗ Important Notes:&lt;/h3&gt;<br> &lt;ul&gt;<br> &lt;li&gt;Refunds exclude original shipping fees&lt;/li&gt;<br> &lt;li&gt;Customs duties on international returns are non-refundable&lt;/li&gt;<br> &lt;li&gt;Final sale items marked &quot;Non-returnable&quot; are excluded&lt;/li&gt;<br> &lt;/ul&gt;<br> <br> &lt;p&gt;🔔 &lt;em&gt;Need help? Chat live with our support team → [右下角聊天图标]&lt;/em&gt;&lt;/p&gt;<br>&lt;/div&gt;<br>