The 3D top drive needs WebGL, which this browser has switched off. Everything it shows is written out below: how it works and the washpipe cartridge.
The washpipe cartridge swaps in the field. Without pulling the top drive apart.
A top drive turns the drill string from the top of the mast. In this one, the washpipe cartridge, the wear part that carries mud into the spinning shaft, slides out sideways on two hub clamps. Scroll to take it apart.
Drawn the way a spec sheet draws it.
The machine laid out in elevation and plan, with six rounded dimensions lettered A to F. Then the drawing resolves into the machine.
What’s aheadThe gearbox and swivel cut open, the machine taken apart, what each assembly does, then the cartridge and how it swaps.
Into the gearbox and the swivel.
The front half comes away. In the gearbox, the main shaft and the helical gearing that turns it, drawn schematically. Above it, inside the swivel, the washpipe cartridge, cut through its housings, planetary gear, washpipe and packing.
Eleven assemblies, in the order they stack.
Block, gooseneck, washpipe cartridge, drilling motor, gearbox, frame and guide dolly, main shaft, rotating link adapter, safety valves, grabber, links and elevator. Tap a name to read that part.
What each assembly does, one at a time.
The carrier that holds the washpipe turns slower than the shaft.
A planetary gear inside the lower housing splits the rotation between the lower and upper housings. The washpipe rides on the slower carrier, so the seals around it see less speed and wear more slowly.
Gear proportions are drawn for illustration. They are not taken from any real unit.
Out sideways, on two hub clamps.
The cartridge slides in horizontally and is held by two hub clamps on permanent adapter hubs. The hubs stay on the gooseneck and the main shaft.
In shortThe motor turns the main shaft through the gearbox, mud comes in through the gooseneck, and the cartridge that carries the washpipe comes out sideways on two hub clamps.
Spin it. Swap the cartridge.
Drag the shaft, or use the control, to spin the main shaft. Open the hub clamps to slide the cartridge out.
The 3D model is a concept, not an engineering model.
The motor drives the main shaft through the gearbox.
What’s belowThe drive train from the motor to the shaft, then the cartridge that sits above it.
A top drive hangs from the block and travels up and down the mast on a guide dolly. It replaces the rotary table and kelly: the motor turns a main shaft, the shaft turns the drill string, and mud is pumped in through the top.
- Motor. An electric or hydraulic drilling motor supplies the turning power. A blower keeps it cool.
- Gearbox. Helical gears take the motor’s speed down and its torque up on the way to the main shaft.
- Main shaft. Runs the machine’s full height. It carries the load of the string and turns it, and its threaded end can be re-cut as it wears.
- Above the shaft. The washpipe cartridge sits inside the swivel housing, where the gooseneck feeds mud in. See below.
The motor drives the gearbox, the gearbox turns the main shaft, and the washpipe cartridge sits above them in the swivel, where the gooseneck feeds the mud in.
The seals around a spinning pipe are a common wear point.
Mud has to get from a fixed gooseneck into a shaft that is turning. A washpipe and a set of packing seals do that job, and they wear. Swapping the cartridge quickly is worth designing for.
What it does
- Slows the washpipe A planetary gear lets the carrier that holds the washpipe turn slower than the shaft, so the seals around it see less speed.
- Self-aligning Takes up a little sideways misalignment between the gooseneck and the main shaft.
Why it swaps fast
- Hammerless installation It slides in horizontally and is held by two hub clamps on adapter hubs that stay put.
- Pre-compressed packing The packing is compressed on the ground before installation, so no special tools are needed at the rig.
- Sealed gearbox The gears run in oil, with shaft seals to keep the oil in and the dirt out.
A concept built in code, not a product page.
Teardown makes interactive 3D pages that take a machine apart on screen, so a buyer can tap a part and read what it does. This one is a generic top drive drawn from common industry arrangements.
- Generic. Part names are plain descriptions. No part is a real catalogue item.
- Illustrative. Dimensions are rounded and the gear proportions are drawn for explanation. Nothing here is a rating or a specification.
- Yours next. The same treatment works for a real product, with your own drawings and parts list behind it.