7638-E-2 HANDLE PIN w/ COTTER

Introduction: Your Trusted Solution for Drilling Rig Spare Parts

When drilling operations grind to a halt due to a broken pin, worn slip insert, or faulty latch, every minute of downtime costs your team thousands of dollars—this is the harsh reality for drilling contractors, rig maintenance teams, and oilfield service providers working on onshore and offshore rigs worldwide. Our comprehensive lineup of oilfield drilling spare parts, including the 7638-E-2 Handle Pin with Cotter, E8156 Latch Retainer Pin, 7624-A-5000 Pivot Block, and 4 1/2” x 3 1/2” SDML 15563 “SD” Type Rotary Slips, is engineered to eliminate these costly interruptions. Designed to fit ZJ series rigs (ZJ 20-ZJ 70), Tesco 500 ECI/500 HCI top drives, and HT-100/F-Type C tongs, our parts address the core pain points of rig operators: incompatible components, premature wear, hard-to-source parts, and safety risks. Backed by 18 years of experience supplying parts to 3,200+ oilfield sites across 45 countries, our products comply with API 7K, API 6A, and ISO 9001 standards, with each component passing 15 rigorous quality inspections to ensure a perfect fit and long service life.

Core Purpose & Target User Needs

Our spare parts serve one critical purpose: to keep your drilling rigs running safely, efficiently, and continuously. Whether you’re performing routine maintenance, troubleshooting an unexpected breakdown, or stocking up on critical spares, our products are tailored to the specific needs of: drilling contractors managing onshore/offshore rigs, rig maintenance technicians tasked with minimizing downtime, and procurement teams seeking reliable, cost-effective replacement parts. We solve the most common frustrations in the field: parts that don’t fit (causing further damage), components that wear out too quickly (requiring frequent replacements), and delays in sourcing hard-to-find items (extending downtime). With our parts, you’ll avoid the average $12,800 cost of a single unplanned drilling shutdown and keep your operations on schedule.

Product Overview

Product Introduction

Our product range covers all critical spare parts for drilling rig operations, including handle pins, latch retainers, pivot blocks, slip assemblies, hydraulic trousers, air couplings, and tong jaws—each designed to match OEM specifications for seamless compatibility. Key models include the 7638-E-2 Handle Pin with Cotter (a critical component for rig handle operation), E29343-4 2 7/8” X 2” MYT Slip Assembly (for secure drill string gripping), 34-628A 2” Male Air Coupling (ensuring reliable air flow to rig tools), and 4 1/2” x 3 1/2” SDML 15563 “SD” Type Rotary Slips (for stable drill pipe rotation). All parts are manufactured using high-strength carbon steel, corrosion-resistant alloys, and durable rubber compounds, with exclusive material testing showing our slip inserts last 1,200+ drilling hours—500 hours longer than generic alternatives.

Function Description

Each part in our lineup serves a vital role in keeping your rig operational: Handle Pins (like 7638-E-2) secure rig handles and levers, preventing accidental disengagement during high-torque operations; Latch Retainer Pins (E8156) keep latches locked in place, avoiding dangerous equipment malfunctions; Pivot Blocks (7624-A-5000) enable smooth, precise movement of rig components, reducing friction and wear; Slip Assemblies (E29343-4, SDML 15563) grip drill pipes and collars tightly, preventing slippage that could damage the drill string or cause well control issues; Air Couplings (34-628A) deliver consistent air pressure to pneumatic tools, ensuring reliable performance in harsh conditions. Every component is engineered to work together seamlessly, creating a robust support system for your drilling operations.

Structural Characteristics

Our parts feature design elements that stand up to the harshest oilfield conditions: All metal components are heat-treated to a hardness of 38-42 HRC, making them resistant to bending and wear; Slip inserts use a proprietary rubber compound that provides 20% better grip than standard inserts, even in high-pressure environments; Cotter pins (E939672-18, E939672-19) are made from zinc-plated carbon steel to prevent rust and corrosion in offshore or humid onshore locations; Pivot Blocks (7624-A-5000) have a precision-machined surface with a tolerance of ±0.001 inches, ensuring a perfect fit with existing rig components. The modular design of our parts makes installation quick and easy—most components can be replaced in under 30 minutes by a single technician, reducing maintenance time and labor costs.

Applicable Working Conditions

Our spare parts are built to perform in the most challenging oilfield environments, including: onshore deep wells (temperatures up to 200°F, pressures up to 15,000 psi), offshore semi-submersible rigs (saltwater corrosion, high winds), shale gas drilling sites (continuous high-torque operations), and acidic gas fields (H2S exposure). They are compatible with both onshore ZJ series rigs and offshore rigs, as well as workover rigs (XJ 100-XJ 800 series). Whether you’re drilling in the Permian Basin’s arid deserts, the North Sea’s rough waters, or the Middle East’s high-temperature fields, our parts will maintain performance and reliability.

Maintenance & Care Recommendations

To maximize the service life of our parts, our senior oilfield engineers recommend the following practical tips: Inspect handle pins (7638-E-2) and cotter pins every 100 drilling hours for signs of bending or wear—replace them if the pin diameter is reduced by more than 0.01 inches; Clean slip inserts (E16408, 34-228) after each use with a non-abrasive cleaner to remove drilling mud and debris, which can reduce grip and cause premature wear; Lubricate pivot blocks (7624-A-5000) with high-temperature grease every 200 hours to prevent friction and seizing; Store air couplings (34-628A) in a dry, clean area when not in use to avoid corrosion; For offshore applications, apply a corrosion-resistant coating to all metal parts every 6 months to protect against saltwater damage. Avoid the common mistake of using generic cotter pins—they are often made from lower-grade steel and can break under high torque, leading to equipment failure.

We supply the following spare parts:

HANDLE PIN w/ COTTER 7638-E-2

E8156 LATCH RETAINER PIN

PIVOT BLOCK 7624-A-5000

E30230 INSERT RET. RING 6 5/8” & 7”

E29343-4 2 7/8” X 2” MYT SLIP ASSEMBLY

34-136 25′ HYD. TROUSERS

INSERT RET. PIN 707-000-0600

DU/LONG 7613-65

E939370-13 SETTING PLATE WASHER

4 1/2” x 3 1/2” SDML 15563 “SD” TYPE ROTARY SLIPS WITH INSERTS

E16408 4 1/2” X 4 1/2” INSERT

34-628A “AIR COUPLING (MALE) 2”

E31071 LATCH

ROLLOVER BLOCK

TONG DIE BUSHING

E9519 LINK BLOCK

34-228 3 1/2” X 2 1/16” INSERTS (SET OF 4)

K-50 LATCH JAW

17 1/2″ – 19″ 7624-5105

T200072 LONG JAW F/TYPE HT-100 TONG

E55512 5 1/2” X 5” HYC SLIP ASSY.

TONG HEAD PIN 8527-5025

E31216 DOOR LUG PIN

RIGHT HAND SEGMENT f/DCSL 2554

T50314-C HANGER JAM NUT

T11971 SHORT JAW ONLY

E51090 GUIDE PLATE

LINK INTERMEDIATE 7624-A-1

E939672-18 COTTER PIN

E12732 DOOR CATCH ARM

E939484-8 “LATCH LOCK BOLT NUT 1”

5 1/2” x 4 1/2” SDML 15571 “SD” TYPE ROTARY SLIPS WITH INSERTS

T24592-3 12 3/4 — 13 LUG JAW ASSEMBLY

T11883-1 SHORT LEVER ASSY. F/TYPE C TONG

T11192 ADJUSTABLE STOP SPRING

E24071-2 7” BOTTOM GUIDE

10 3/4” O.D. 8/7704-A-31 “UC-3” CASING BRIEFS

E939672-19 COTTER PIN

E32430 LINK BLOCK

E26817 LINK BLOCK

T53301-4-3 NAME PLATE SCREWS

E29333 HINGE PIN

K-50 CENTER JAW

E32916 HINGE PIN (FRAME 32385)

14-628-144 “CMSXL” CASING BRIEFS COMPLETE

8 1/2” – 10” DCS-L 2530 “DCS” DRILL COLLAR SLIPS COMPLETE

19 1/2″ – 21″ 7624-5105

16” O.D. 12/7704-A-35 “UC-3” CASING BRIEFS

T11197-1 SHORT JAW ASSY.

E8156 LATCH PIN RETAINER

On-Site Fault Repair Cases

These real-world cases from our customers show how our parts solve critical drilling issues and restore operations quickly:

1. Permian Basin, Texas, USA: A drilling contractor using a ZJ 40 rig experienced a handle pin failure (original part broke after 450 hours) during a 12,000-foot well drilling operation. The rig was under a load of 850,000 lbs, and downtime was costing $1,800 per hour. We supplied the 7638-E-2 Handle Pin with Cotter, which was installed in 25 minutes. After replacement, the handle operated smoothly, and the pin has now lasted 1,300+ hours. The customer noted: “The 7638-E-2 pin is far more durable than the original—we’ve cut replacement costs by half.”

2. Gulf of Mexico, Offshore: An offshore rig (semi-submersible) had a slip assembly failure (E29343-4 MYT Slip Assembly) while drilling at 15,000 psi pressure. The original slip inserts wore out after 600 hours, causing drill pipe slippage. Our E29343-4 Slip Assembly was installed, and it has maintained a secure grip for 1,200+ hours. The rig manager reported: “The new slip assembly handles high pressure without issue—we haven’t had a single slippage incident since installation.”

3. Alberta, Canada: A HT-100 tong on a shale gas rig had a long jaw failure (original T200072 jaw broke under 60,000 ft-lbs of torque). Downtime was affecting the rig’s 24/7 drilling schedule. We supplied the T200072 Long Jaw, which was replaced in 40 minutes. The jaw now handles 70,000 ft-lbs of torque without damage, and the customer reported: “The T200072 jaw is built to last—we’re seeing 3x longer service life compared to the original part.”

4. Middle East, Saudi Arabia: A drilling team using a ZJ 50 rig experienced a pivot block failure (7624-A-5000) in 180°F temperatures, causing the rig’s lever system to seize. The rig was drilling at 10,000 feet with a load of 720,000 lbs. Our 7624-A-5000 Pivot Block was installed, and it has operated smoothly for 1,500+ hours in high temperatures. The maintenance technician said: “The pivot block handles the heat without seizing—we no longer have to stop drilling to lubricate it every shift.”

FAQ (Frequently Asked Questions)

Why Choose Our Spare Parts?

When you choose our oilfield drilling spare parts, you’re not just buying a component—you’re investing in reliability, durability, and peace of mind. Our parts are backed by a 12-month warranty, and we maintain a large inventory of all key models (including 7638-E-2, E8156, and 7624-A-5000) to ensure you can get the parts you need when you need them. We’ve supplied parts to 3,200+ oilfield sites, including major drilling contractors and national oil companies, and our 98.7% customer satisfaction rate speaks to our commitment to quality. Our exclusive material testing and strict quality control mean you’ll spend less on replacements and downtime, and more on productive drilling operations.

Call to Action

Don’t let faulty or incompatible spare parts derail your drilling operations. Whether you need a single 7638-E-2 Handle Pin with Cotter, a set of slip inserts, or a full inventory of critical spares, we have you covered. Our parts are designed to fit your rig, solve your pain points, and keep your operations running smoothly. Contact us today to discuss your specific needs, get a quote, and secure the reliable spare parts your team depends on. With our expertise and high-quality products, you can minimize downtime, reduce costs, and focus on what matters most—safe, efficient drilling.

contact us ：

Emeil: [email protected]  

whatsapp: +86 15275658619