# SiamEngy petroleum calculator

> Oil and gas industry multitool with formulas, unit converter, and reference information. (iPhone/iPad app by SIAM GEOTEST, OOO.)

- Source: https://appshunter.io/ios/app/siamengy-petroleum-calculator/id1602641707 (this page in markdown: same URL + `.md`)
- Developer: [SIAM GEOTEST, OOO](https://appshunter.io/developer/1602641709)
- Category: Reference, Education
- Price: Free
- Age rating: 4+
- Requires: iOS 9.0 · 56 MB
- Languages: English
- Released: 2022-01-24
- Data updated: 2026-07-26
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/siamengy-petroleum-calculator/id1602641707/reviews.md

## What is SiamEngy petroleum calculator?

SiamEngy is a multitool application, a tool set for workers of oil and gas industry to solve everyday tasks.
The application is divided into 3 logical blocks:
1. The "Formulas" is an interactive tool for calculating parameters for fifty different equations from 6 categories. The application allows calculating any parameter from the formula due to the built-in numerical optimization algorithms.
2. The "Converter" allows translating measurement units for the most common oil industry parameters in a convenient form.
3. The "Reference" supplements the other tools with brief, but succinct and illustrated information about the parameters and processes associated with the main content.
This application is suitable for both engineers and students specializing in the oil and gas engineering.
The application functionality allows adding the most useful content to favorites, and allows saving the history of user actions.
The application is open for expansion both in width (adding new tools) and in depth (increasing the amount of content) and will improve depending on user activity.

## Key features

- Interactive formula calculator
- Unit converter for oil industry parameters
- Illustrated reference information
- Favorites and history saving
- Numerical optimization algorithms

## Recent user reviews (10 of 11)

All indexed reviews: https://appshunter.io/ios/app/siamengy-petroleum-calculator/id1602641707/reviews.md

### 5/5 — Развивайтесь

*2026-01-04, version 1.1.9*

Спасибо за столь полезное приложение, надеюсь продолжите его улучшать!

### 5/5 — Отлично!

*2024-12-15, version 1.1.9*

Рекомендую всем причастным)

### 5/5 — Класс!

*2024-07-18, version 1.1.9*

Классное приложение! Спасибо ребятам разработчикам

### 5/5 — Красавцы

*2023-12-17, version 1.1.9*

Отличное приложение, наверное даже лучшее, из всех, что встречал по нефтянке!

### 5/5 — АПВ

*2023-06-20, version 1.1.7*

Добавьте пожалуйста еще расчёт обьема в режиме АПВ

### 5/5 — Gunar1970

*2022-12-26, version 1.1.7*

Отличное приложение! Парни не останавливайтесь на достигнутом, продолжайте дальше. На сегодняшний день мало подобных приложений, деньги берут по подписке а развития нет. Можно еще расширить раздел геологии, добычи, супервайзинга по ТКРС. Томичи Вы лучшие, школа Томска всегда была на высоте. Я бы еще порекомендовал бы немного дизайн поправить…👍

### 5/5 — Нагнетательные скаважины

*2022-07-24, version 1.1.4*

Отличное приложение!
Добавьте калькуляторы по нагнетательным скважинам: давление автоГРП, пересчёт автоГРП на устьевое давление и тд

### 5/5 — Приложение очень хорошее, не останавливайтесь на достигнутом 👍😏

*2022-07-03, version 1.1.4*

Приложение очень хорошее, не останавливайтесь на достигнутом 👍😏

### 5/5 — Огромное спасибо!

*2022-04-13, version 1.1.3*

Развивайте приложение, хотелось бы ещё много увидеть в приложении.

### 5/5 — потрясающее приложение

*2022-01-25, version 1.1.2*

Отличный карманный помощник. Теперь все необходимые расчёты всегда под рукой 🙂

## Frequently asked questions about SiamEngy petroleum calculator

### What is SiamEngy petroleum calculator used for?

SiamEngy petroleum calculator is a multitool designed for oil and gas industry workers and students. It helps solve everyday tasks with features like formula calculations, unit conversions, and reference information.

### What types of calculations can SiamEngy perform?

SiamEngy petroleum calculator includes an interactive tool for calculating parameters for fifty different equations across six categories. It uses built-in numerical optimization algorithms to solve for any parameter within a formula.

### Does SiamEngy petroleum calculator support offline use?

The provided description does not specify offline functionality. However, its nature as a reference and calculation tool suggests it may be usable without a constant internet connection for core features.

### What devices is SiamEngy petroleum calculator available on?

SiamEngy petroleum calculator is available on iPhone, iPad, and iPod devices.

### How often is SiamEngy petroleum calculator updated?

The latest version, 1.1.9, was released on December 15, 2023. The app is open for expansion and improvement based on user activity, indicating ongoing development.

### Is SiamEngy petroleum calculator suitable for beginners?

Yes, the app is suitable for both experienced engineers and students specializing in oil and gas engineering. The reference section provides succinct information to supplement the tools.

### Does SiamEngy petroleum calculator have ads?

No, SiamEngy petroleum calculator does not contain advertisements. It is a free application without any ads.

### Can I save my favorite formulas or calculations in SiamEngy petroleum calculator?

Yes, the application functionality allows users to add the most useful content to their favorites. It also saves the history of user actions for easy access.

## Version history (last 5 releases)

### 1.1.9 — 2023-12-15

Formulas:
- fixed HCL solution calculations (mass fractions are used now instead of volume fraction before);
- added a formula for estimating the ESP head;
- added calculation of the liquid level based on the pump intake pressure;
- added calculation of the gas compressibility factor;
- added calculation of dry gas density.
Converter:
- added conversion of oil specific gravity to API gravity

### 1.1.7 — 2022-10-04

New formulas were added:
- hydrate formation equation;
- supply appearance time when starting ESP;
- water volume for the preparation of HCL solution;
- inhibitor volume for the preparation of HCL solution.
The formula "Drilling mud density reduction" modified to the formula "Change in the solution density".
New references were added.
Notification for calculations with multiple possible equation solutions was added.

### 1.1.6 — 2022-08-05

New formulas were added:
- hydrate formation equation;
- supply appearance time when starting ESP;
- water volume for the preparation of HCL solution;
- inhibitor volume for the preparation of HCL solution.
The formula "Drilling mud density reduction" modified to the formula "Change in the solution density".
New references were added.
Notification for calculations with multiple possible equation solutions was added.

### 1.1.4 — 2022-06-29

New formulas were added:
- annular velocity;
- drill bit size;
- drilling mud density;
- drilling mud density reduction;
- weighting of drilling mud;
- buoyancy factor;
- Joshi equation for horizontal gas wells;
- gas rate;
- HCL solution concentration;
- concentrated HCL volume for solution preparation;
- liquid volume in the horizontal tank by level.

New references for drilling were added.

Support for changing the font size through the smartphone system settings was added.

### 1.1.3 — 2022-03-28

The formula for evaluating the choke diameter for gas wells was added.
The text adaptation for different screen sizes was improved.
The graphics display in references was improved.
The detailed display of parameters for formulas was improved.

## Apps similar to SiamEngy petroleum calculator

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [SPE International](https://appshunter.io/ios/app/spe-international/id1448458533) | 4.9 (8) | Free | Reference |
| [Mud fluid](https://appshunter.io/ios/app/mud-fluid/id1582369827) | — | Free | Reference |

## Related topics

[petroleum engineering](https://appshunter.io/ios/topics/petroleum-engineering)

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*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 2026-07-26.*