# 3D Interpolation — for Directional Drilling

> Calculates directional drilling parameters for oil wells using measured depth, inclination, and azimuth. (iPhone/iPad app by Carlos Moura.)

- Source: https://appshunter.io/ios/app/3d-interpolation/id1000298349 (this page in markdown: same URL + `.md`)
- Developer: [Carlos Moura](https://appshunter.io/developer/407501202)
- Category: Utilities, Education
- Price: $4.99
- Age rating: 4+
- Requires: iOS 12.0 · 7 MB
- Languages: American English
- Released: 2015-06-13
- Data updated: 2026-08-13
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/3d-interpolation/id1000298349/reviews.md

## What is 3D Interpolation?

The 3D Interpolation provides an useful tool to calculate projections TVD (True Vertical Depth), N/S and E/W coordinates, Horizontal Displacement, Dog-Leg Severity, Build-Up Rate (Angle Rate, Intensity) and Turn Rate and also the Interpolation of these parameters between two well planning sections or survey stations defined by Measured Depth, Inclination and Azimuth as entry parameters in the directional drilling of oil wells.

Calculations Method: Minimum Curvature

Length Units: Foot and Meter (Metre)
Intensity Units: degree/100ft, degree/10m, degree/30m and degree/100m

Our goal was to create a low-cost application with the help of experts to share with drilling engineers, technicians, drillers, students and teachers of drilling engineering. 

You can contribute with suggestions for improvements, correcting the translation to english, 
reporting bugs and sharing it with your friends.

Thanks


DISCLAIMER: 

These tools & materials are provided 'as is' without warranties of any kind, express or implied. 
Please verify the tools provided by this application by yourself before you use them. Ensure you understand the impact of using these tools. 
Any use you choose to make of these tools & materials is undertaken by you entirely at you own risk.

## Key features

- Calculate TVD, N/S, E/W coordinates
- Determine Horizontal Displacement
- Calculate Dog-Leg Severity
- Measure Build-Up Rate
- Calculate Turn Rate
- Interpolate parameters between survey stations

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/3d-interpolation/id1000298349/reviews.md

### 2/5 — Nice idea but wrong numbers

*2020-10-18*

The calculations on the interpolated azimuth are obviously incorrect (goes from 296 to -63 to 297.  This is terrible.

## Frequently asked questions about 3D Interpolation

### What parameters does 3D Interpolation calculate?

3D Interpolation calculates True Vertical Depth (TVD), N/S and E/W coordinates, Horizontal Displacement, Dog-Leg Severity, Build-Up Rate, and Turn Rate. It also interpolates these parameters between defined well planning sections or survey stations.

### What is the calculation method used by 3D Interpolation?

The application utilizes the Minimum Curvature method for its calculations. This is a standard and widely accepted method in directional drilling.

### What units does 3D Interpolation support?

3D Interpolation supports both Foot and Meter (Metre) for length units. For intensity units, it supports degree/100ft, degree/10m, degree/30m, and degree/100m.

### Is 3D Interpolation suitable for beginners?

Yes, the app was created with the goal of being a low-cost tool to share with drilling engineers, technicians, drillers, students, and teachers. It aims to be accessible to a range of experience levels.

### What devices is 3D Interpolation compatible with?

3D Interpolation is compatible with iPhone, iPad, and iPod devices. It is designed for iOS users.

### How often is 3D Interpolation updated?

The latest version, 3.0, was last updated on September 9, 2024. This indicates active development and support for the application.

### Does 3D Interpolation have ads?

No, 3D Interpolation does not contain advertisements. The application is ad-free, providing an uninterrupted user experience.

### What is the price of 3D Interpolation?

3D Interpolation is available for a one-time purchase price of $4.99. This makes it a cost-effective tool for professionals and students.

## Version history (last 5 releases)

### 3.0 — 2024-09-09

- added support for iPad 11 screen format.
- improvements in editing 3D interpolation parameters.
- bug fixes

### 2.1 — 2024-09-07

- improvements in editing 3D interpolation parameters.
- minor fixes

### 2.0 — 2021-08-13

- updated for newer iOS versions (dark mode)

### 1.1 — 2018-07-18

This app has been updated by Apple to display the Apple Watch app icon.

- update for newer iOS versions
- added iPhone X compatibility
- added "minimum curvature method" formulas

### 1.0 — 2015-06-13

No release notes.

## Apps similar to 3D Interpolation

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Fluid Mechanics Calc](https://appshunter.io/ios/app/fluid-mechanics-calc/id1404879538) | 5.0 (3) | Free | Utilities |
| [Gear Simulation & Calculation](https://appshunter.io/ios/app/gear-simulation-and-calculation/id1618701429) | 4.3 (8) | $3.99 | Utilities |
| [E-JETS Virtual Panel](https://appshunter.io/ios/app/e-jets-virtual-panel/id1350627457) | 4.9 (110) | $19.99 | Utilities |
| [Drillstring Toolbox Premium](https://appshunter.io/ios/app/drillstring-toolbox-premium/id1222651738) | — | $24.99 | Utilities |
| [SCR MAXFLO™](https://appshunter.io/ios/app/scr-maxflo/id1077499630) | 4.6 (5) | Free | Utilities |
| [Flight Assessment of Risk Tool](https://appshunter.io/ios/app/flight-assessment-of-risk-tool/id1570992859) | 3.3 (9) | Free | Utilities |

## More apps by Carlos Moura

- [Drilling Hydraulics (Basic)](https://appshunter.io/ios/app/drilling-hydraulics-basic/id673992115)
- [Directional Drilling](https://appshunter.io/ios/app/directional-drilling/id928989079)
- [Ton Miles Calculator](https://appshunter.io/ios/app/ton-miles-calculator/id965020659)
- [Kick Game 2](https://appshunter.io/ios/app/kick-game-2/id1060736340)
- [Driller's Method](https://appshunter.io/ios/app/drillers-method/id1067011800)

All apps by Carlos Moura: https://appshunter.io/developer/407501202

---

*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-13.*