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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0"/>
<title>API Pump Design Calculator based on Swab Analysis</title>
<script src="https://cdn.tailwindcss.com"></script>
<script src="https://cdn.jsdelivr.net/npm/chart.js"></script>
<link href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.5.0/css/all.min.css" rel="stylesheet"/>
<style>
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700&display=swap');
body {
font-family: 'Poppins', sans-serif;
}
.card {
transition: all 0.3s ease;
}
.card:hover {
box-shadow: 0 10px 20px rgba(0,0,0,0.1);
transform: translateY(-5px);
}
.select2-container {
width: 100% !important;
}
.loading {
border-top-color: #ffffff;
animation: spin 1s linear infinite;
}
.form-group {
@apply mb-6;
}
.form-group label {
@apply block text-sm font-medium text-gray-700 mb-2;
}
.help-text {
@apply text-xs text-gray-500 mt-1;
}
@keyframes spin {
0% { transform: rotate(0deg); }
100% { transform: rotate(360deg); }
}
</style>
</head>
<body class="bg-gradient-to-br from-blue-50 to-indigo-100 min-h-screen">
<div class="container mx-auto px-4 py-8 max-w-6xl">
<!-- Header -->
<div class="text-center mb-8">
<h1 class="text-4xl font-bold text-indigo-800 flex justify-center items-center gap-3">
<i class="fas fa-cogs text-yellow-500"></i>
API Pump Design Calculator
</h1>
<p class="text-gray-600 mt-2">Based on Swab Analysis & API 11E Standard</p>
</div>
<!-- Main Calculator Card -->
<div class="bg-white rounded-2xl shadow-xl p-8 mb-6 card">
<div class="grid grid-cols-1 lg:grid-cols-2 gap-8">
<!-- Input Section -->
<div>
<h2 class="text-2xl font-semibold text-gray-800 mb-6 flex items-center">
<i class="fas fa-calculator text-blue-500 mr-2"></i>
Input Parameters
</h2>
<div class="space-y-6">
<!-- Depth -->
<div class="form-group">
<label for="depth">Well Depth (ft)</label>
<input type="number" id="depth" placeholder="e.g. 8000"
class="w-full px-4 py-3 border border-gray-300 rounded-lg focus:ring-2 focus:ring-blue-500 focus:border-transparent transition-all">
<div class="help-text">Measured depth of the well from surface to bottom hole</div>
</div>
<!-- Swab Result -->
<div class="form-group">
<label for="swabResult">Swab Result (Barrels per Day - B/D)</label>
<input type="number" id="swabResult" placeholder="e.g. 500"
class="w-full px-4 py-3 border border-gray-300 rounded-lg focus:ring-2 focus:ring-blue-500 focus:border-transparent transition-all">
<div class="help-text">Production rate achieved during swabbing operation</div>
</div>
<!-- Fluid Levels -->
<div class="grid grid-cols-1 md:grid-cols-2 gap-4">
<div class="form-group">
<label for="wfl">Working Fluid Level - WFL (ft)</label>
<input type="number" id="wfl" placeholder="e.g. 6000"
class="w-full px-4 py-3 border border-gray-300 rounded-lg focus:ring-2 focus:ring-blue-500 focus:border-transparent transition-all">
<div class="help-text">Fluid level during production</div>
</div>
<div class="form-group">
<label for="sfl">Static Fluid Level - SFL (ft)</label>
<input type="number" id="sfl" placeholder="e.g. 3000"
class="w-full px-4 py-3 border border-gray-300 rounded-lg focus:ring-2 focus:ring-blue-500 focus:border-transparent transition-all">
<div class="help-text">Fluid level at static conditions</div>
</div>
</div>
<!-- Tubing Size -->
<div class="form-group">
<label for="tubingSize">Tubing Size (inches)</label>
<select id="tubingSize" class="w-full px-4 py-3 border border-gray-300 rounded-lg focus:ring-2 focus:ring-blue-500 focus:border-transparent transition-all bg-white">
<option value="">Select Tubing Size</option>
<option value="1.9">1.900" (40 ft³/1000 ft)</option>
<option value="2.375">2.375" (60 ft³/1000 ft)</option>
<option value="2.875">2.875" (80 ft³/1000 ft)</option>
<option value="3.5">3.500" (120 ft³/1000 ft)</option>
<option value="4.5">4.500" (180 ft³/1000 ft)</option>
</select>
<div class="help-text">Inside diameter of production tubing</div>
</div>
<!-- Casing Size -->
<div class="form-group">
<label for="casingSize">Casing Size (inches)</label>
<select id="casingSize" class="w-full px-4 py-3 border border-gray-300 rounded-lg focus:ring-2 focus:ring-blue-500 focus:border-transparent transition-all bg-white">
<option value="">Select Casing Size</option>
<option value="4.5">4.500" (Normal)</option>
<option value="5.5">5.500" (Common)</option>
<option value="7">7.000" (Large)</option>
<option value="9.625">9.625" (Surface)</option>
<option value="13.375">13.375" (Conductor)</option>
</select>
<div class="help-text">Inside diameter of the casing string</div>
</div>
<!-- Pump Type -->
<div class="form-group">
<label for="pumpType">Pump Type</label>
<select id="pumpType" class="w-full px-4 py-3 border border-gray-300 rounded-lg focus:ring-2 focus:ring-blue-500 focus:border-transparent transition-all bg-white">
<option value="">Select Pump Type</option>
<option value="D">Class D - Heavy Duty</option>
<option value="H">Class H - Heavy Duty</option>
<option value="K">Class K - Extra Heavy Duty</option>
</select>
<div class="help-text">API pump class based on load requirements</div>
</div>
<!-- Power Fluid Specific Gravity -->
<div class="form-group">
<label for="specificGravity">Power Fluid Specific Gravity</label>
<input type="number" step="0.01" id="specificGravity" placeholder="e.g. 0.87" value="0.87"
class="w-full px-4 py-3 border border-gray-300 rounded-lg focus:ring-2 focus:ring-blue-500 focus:border-transparent transition-all">
<div class="help-text">Typically 0.85-0.90 for crude oil</div>
</div>
</div>
</div>
<!-- Output Section -->
<div>
<h2 class="text-2xl font-semibold text-gray-800 mb-6 flex items-center">
<i class="fas fa-chart-line text-green-500 mr-2"></i>
Design Results
</h2>
<div class="bg-gray-50 rounded-xl p-6 h-full flex flex-col">
<div id="resultsContainer" class="space-y-4 flex-grow">
<!-- Enhanced result display with icons -->
<div class="result-item flex justify-between py-2 border-b border-gray-200">
<span class="text-gray-600 flex items-center">
<i class="fas fa-tint mr-2 text-blue-500"></i>
Recommended Pump Size:
</span>
<span id="pumpSize" class="font-semibold text-indigo-700">-</span>
</div>
<div class="result-item flex justify-between py-2 border-b border-gray-200">
<span class="text-gray-600 flex items-center">
<i class="fas fa-ruler-vertical mr-2 text-green-500"></i>
Plunger Size (in):
</span>
<span id="plungerSize" class="font-semibold text-indigo-700">-</span>
</div>
<div class="result-item flex justify-between py-2 border-b border-gray-200">
<span class="text-gray-600 flex items-center">
<i class="fas fa-water mr-2 text-purple-500"></i>
Barrels per Stroke:
</span>
<span id="barrelsPerStroke" class="font-semibold text-indigo-700">-</span>
</div>
<div class="result-item flex justify-between py-2 border-b border-gray-200">
<span class="text-gray-600 flex items-center">
<i class="fas fa-sync-alt mr-2 text-orange-500"></i>
Required Strokes/min:
</span>
<span id="strokesPerMin" class="font-semibold text-indigo-700">-</span>
</div>
<div class="result-item flex justify-between py-2 border-b border-gray-200">
<span class="text-gray-600 flex items-center">
<i class="fas fa-chart-area mr-2 text-teal-500"></i>
Fluid Capacity (BPD):
</span>
<span id="fluidCapacity" class="font-semibold text-indigo-700">-</span>
</div>
<div class="result-item flex justify-between py-2 border-b border-gray-200">
<span class="text-gray-600 flex items-center">
<i class="fas fa-compress-arrows-alt mr-2 text-red-500"></i>
Pump Submergence:
</span>
<span id="submergence" class="font-semibold text-indigo-700">-</span>
</div>
<div class="result-item flex justify-between py-2 border-b border-gray-200">
<span class="text-gray-600 flex items-center">
<i class="fas fa-temperature-low mr-2 text-indigo-500"></i>
Pump Setting Depth:
</span>
<span id="pumpDepth" class="font-semibold text-indigo-700">-</span>
</div>
<div class="result-item flex justify-between py-2">
<span class="text-gray-600 flex items-center">
<i class="fas fa-file-code mr-2 text-gray-500"></i>
API Design Code:
</span>
<span id="apiCode" class="font-semibold text-indigo-700">-</span>
</div>
</div>
<div class="mt-6 space-y-4">
<button id="calculateBtn"
class="w-full bg-gradient-to-r from-blue-600 to-indigo-600 text-white font-semibold py-3 px-6 rounded-lg hover:from-blue-700 hover:to-indigo-700 transition-all duration-300 flex items-center justify-center">
<i class="fas fa-cog mr-2"></i>
Calculate Pump Design
</button>
<button id="resetBtn"
class="w-full bg-gradient-to-r from-gray-500 to-gray-600 text-white font-semibold py-3 px-6 rounded-lg hover:from-gray-600 hover:to-gray-700 transition-all duration-300 flex items-center justify-center">
<i class="fas fa-redo mr-2"></i>
Reset Form
</button>
</div>
</div>
</div>
</div>
</div>
<!-- Charts and Analysis Section -->
<div class="grid grid-cols-1 lg:grid-cols-3 gap-6 mb-6">
<!-- Performance Chart -->
<div class="bg-white rounded-2xl shadow-xl p-6 lg:col-span-2">
<h3 class="text-xl font-semibold text-gray-800 mb-4">Pump Performance Analysis</h3>
<div class="relative">
<canvas id="performanceChart" height="300"></canvas>
<div id="chartLegend" class="absolute top-0 right-0 bg-white p-2 rounded shadow-md text-xs">
<div class="flex items-center mb-1">
<div class="w-3 h-3 bg-blue-500 mr-1"></div>
<span>Max Capacity</span>
</div>
<div class="flex items-center">
<div class="w-3 h-3 bg-green-500 mr-1"></div>
<span>Required Rate</span>
</div>
</div>
</div>
</div>
<!-- Tubing Capacity Chart -->
<div class="bg-white rounded-2xl shadow-xl p-6">
<h3 class="text-xl font-semibold text-gray-800 mb-4">Wellbore Configuration</h3>
<canvas id="tubingChart" height="300"></canvas>
<div class="mt-4 text-sm">
<div class="flex justify-between mb-2">
<span class="text-gray-600">Tubing ID:</span>
<span id="displayTubing" class="font-medium">-</span>
</div>
<div class="flex justify-between mb-2">
<span class="text-gray-600">Casing ID:</span>
<span id="displayCasing" class="font-medium">-</span>
</div>
<div class="flex justify-between">
<span class="text-gray-600">Annular Volume:</span>
<span id="annularVol" class="font-medium">-</span>
</div>
</div>
</div>
</div>
<!-- API Standard Reference and Recommendations -->
<div class="grid grid-cols-1 lg:grid-cols-2 gap-6 mb-6">
<div class="bg-white rounded-2xl shadow-xl p-6">
<h3 class="text-xl font-semibold text-gray-800 mb-4 flex items-center">
<i class="fas fa-lightbulb text-yellow-500 mr-2"></i>
Design Recommendations
</h3>
<div id="recommendations" class="space-y-3 text-gray-700">
<p>Enter well parameters and click "Calculate" to view design recommendations.</p>
</div>
</div>
<div class="bg-white rounded-2xl shadow-xl p-6">
<h3 class="text-xl font-semibold text-gray-800 mb-4 flex items-center">
<i class="fas fa-book text-purple-500 mr-2"></i>
API 11E Standard
</h3>
<div class="bg-blue-50 border-l-4 border-blue-400 p-4 rounded-r-lg">
<p class="text-gray-700 text-sm">
<strong>API Specification 11E</strong> covers design requirements for sucker rod pumping units and accessories.
This calculator uses standard formulas for pump displacement, fluid load calculations, and proper pump selection
based on well parameters. Always verify with local engineering standards and manufacturer specifications.
</p>
</div>
</div>
</div>
</div>
<script>
// Sample tubing data for chart
const tubingSizes = ['1.9"', '2.375"', '2.875"', '3.5"', '4.5"'];
const tubingCapacity = [40, 60, 80, 120, 180]; // ft³ per 1000 ft
// Casing data
const casingSizes = ['4.5"', '5.5"', '7"', '9.625"', '13.375"'];
const casingCapacity = [50, 80, 150, 280, 500]; // ft³ per 1000 ft
// Initialize charts
let performanceChart, tubingChart;
window.onload = function() {
initCharts();
setupEventListeners();
};
function initCharts() {
// Performance Chart
const perfCtx = document.getElementById('performanceChart').getContext('2d');
performanceChart = new Chart(perfCtx, {
type: 'line',
data: {
labels: Array.from({length: 21}, (_, i) => i * 2),
datasets: [{
label: 'Maximum Capacity (BPD)',
data: Array.from({length: 21}, () => 0),
borderColor: '#3B82F6',
backgroundColor: 'rgba(59, 130, 246, 0.1)',
tension: 0.3,
fill: true
},
{
label: 'Required Production Rate',
data: Array.from({length: 21}, () => 0),
borderColor: '#10B981',
borderDash: [5, 5],
pointRadius: 0
}]
},
options: {
responsive: true,
plugins: {
legend: {
display: false
},
tooltip: {
mode: 'index',
intersect: false
}
},
scales: {
y: {
beginAtZero: true,
title: {
display: true,
text: 'Capacity (BPD)'
}
},
x: {
title: {
display: true,
text: 'Strokes per Minute'
},
ticks: {
stepSize: 2
}
}
}
}
});
// Tubing and Casing Chart
const tubeCtx = document.getElementById('tubingChart').getContext('2d');
tubingChart = new Chart(tubeCtx, {
type: 'bar',
data: {
labels: ['Tubing', 'Casing'],
datasets: [{
label: 'Wellbore Capacity (ft³ per 1000 ft)',
data: [0, 0],
backgroundColor: [
'#8B5CF6', '#4F46E5'
],
borderColor: [
'#7C3AED', '#4338CA'
],
borderWidth: 1
}]
},
options: {
responsive: true,
plugins: {
legend: {
display: false
}
},
scales: {
y: {
beginAtZero: true,
title: {
display: true,
text: 'Volume (ft³)'
}
}
}
}
});
}
function setupEventListeners() {
document.getElementById('calculateBtn').addEventListener('click', calculateDesign);
document.getElementById('resetBtn').addEventListener('click', resetForm);
// Auto-calculate when pressing Enter in any input field
document.querySelectorAll('input').forEach(input => {
input.addEventListener('keypress', function(e) {
if (e.key === 'Enter') {
calculateDesign();
}
});
});
// Update display when selecting tubing or casing
document.getElementById('tubingSize').addEventListener('change', updateTubingDisplay);
document.getElementById('casingSize').addEventListener('change', updateCasingDisplay);
}
function updateTubingDisplay() {
const tubingSelect = document.getElementById('tubingSize');
const selectedValue = tubingSelect.value;
const displayTubing = document.getElementById('displayTubing');
if (selectedValue) {
// Find the corresponding tubing capacity
const index = ['1.9', '2.375', '2.875', '3.5', '4.5'].indexOf(selectedValue);
const capacity = index >= 0 ? tubingCapacity[index] : 0;
displayTubing.textContent = `${selectedValue}" (${capacity} ft³/kft)`;
// Update chart
tubingChart.data.datasets[0].data[0] = capacity;
tubingChart.update();
}
}
function updateCasingDisplay() {
const casingSelect = document.getElementById('casingSize');
const selectedValue = casingSelect.value;
const displayCasing = document.getElementById('displayCasing');
if (selectedValue) {
// Find the corresponding casing capacity
const index = ['4.5', '5.5', '7', '9.625', '13.375'].indexOf(selectedValue);
const capacity = index >= 0 ? casingCapacity[index] : 0;
displayCasing.textContent = `${selectedValue}" (${capacity} ft³/kft)`;
// Update chart
tubingChart.data.datasets[0].data[1] = capacity;
tubingChart.update();
// Calculate and display annular volume
const tubingSelect = document.getElementById('tubingSize');
const tubingValue = tubingSelect.value;
if (tubingValue) {
const tubingIndex = ['1.9', '2.375', '2.875', '3.5', '4.5'].indexOf(tubingValue);
const tubingCap = tubingIndex >= 0 ? tubingCapacity[tubingIndex] : 0;
// Annular volume is the difference between casing and tubing capacity
const annularVol = capacity - tubingCap;
document.getElementById('annularVol').textContent = `${annularVol.toFixed(1)} ft³/kft`;
}
}
}
function calculateDesign() {
// Get input values
const depth = parseFloat(document.getElementById('depth').value);
const swabResult = parseFloat(document.getElementById('swabResult').value);
const wfl = parseFloat(document.getElementById('wfl').value);
const sfl = parseFloat(document.getElementById('sfl').value);
const tubingSize = document.getElementById('tubingSize').value;
const casingSize = document.getElementById('casingSize').value;
const pumpType = document.getElementById('pumpType').value;
const sg = parseFloat(document.getElementById('specificGravity').value);
// Validate inputs
if (!depth || !swabResult || !wfl || !tubingSize || !casingSize || !pumpType) {
alert('Please fill in all required fields');
return;
}
// Validate that WFL is less than depth
if (wfl >= depth) {
alert('Working Fluid Level must be less than Well Depth');
return;
}
// Validate SFL if provided (should be less than or equal to WFL)
if (sfl && (sfl > wfl || sfl >= depth)) {
alert('Static Fluid Level must be less than or equal to Working Fluid Level and less than Well Depth');
return;
}
// Show loading state
const calcBtn = document.getElementById('calculateBtn');
const originalText = calcBtn.innerHTML;
calcBtn.innerHTML = '<i class="fas fa-spinner loading mr-2"></i>Calculating...';
calcBtn.disabled = true;
// Simulate calculation delay
setTimeout(() => {
// Calculate pump parameters based on API formulas and rules
const depthInThousandFt = depth / 1000;
// Determine plunger size based on depth and production rate
let plungerSize, pumpSize;
// Decision matrix for pump selection based on depth and production rate
if (depth < 6000) {
if (swabResult < 300) {
plungerSize = "1.25";
pumpSize = "16";
} else if (swabResult < 600) {
plungerSize = "1.5";
pumpSize = "20";
} else {
plungerSize = "1.75";
pumpSize = "25";
}
} else if (depth < 9000) {
if (swabResult < 400) {
plungerSize = "1.0";
pumpSize = "13";
} else if (swabResult < 700) {
plungerSize = "1.25";
pumpSize = "16";
} else {
plungerSize = "1.5";
pumpSize = "20";
}
} else {
if (swabResult < 500) {
plungerSize = "0.875";
pumpSize = "10";
} else if (swabResult < 800) {
plungerSize = "1.0";
pumpSize = "13";
} else {
plungerSize = "1.25";
pumpSize = "16";
}
}
// Calculate barrels per stroke (API formula)
const barrelsPerStroke = (0.1166 * Math.pow(parseFloat(plungerSize), 2) * depthInThousandFt).toFixed(3);
// Calculate required strokes per minute
const strokesPerMin = (swabResult / (parseFloat(barrelsPerStroke) * 24)).toFixed(2);
// Calculate fluid capacity at 15 SPM
const fluidCapacity = (parseFloat(barrelsPerStroke) * 24 * 15).toFixed(0);
// Calculate submergence - more accurate calculation
const submergence = ((wfl / depth) * 100).toFixed(1) + "%";
// Calculate optimal pump setting depth (typically 100-200 ft above fluid level)
const pumpSettingDepth = wfl + 150; // 150 ft above fluid level
const maxPumpDepth = depth - 100; // At least 100 ft from bottom
const actualPumpDepth = Math.min(pumpSettingDepth, maxPumpDepth);
// Generate API code
const apiCode = `API ${pumpType}-${pumpSize}(${plungerSize}")-${Math.round(depth)}`;
// Update results
document.getElementById('pumpSize').textContent = pumpSize + " Series";
document.getElementById('plungerSize').textContent = plungerSize + '"';
document.getElementById('barrelsPerStroke').textContent = barrelsPerStroke + " B/Stroke";
document.getElementById('strokesPerMin').textContent = strokesPerMin + " SPM";
document.getElementById('fluidCapacity').textContent = fluidCapacity + " BPD";
document.getElementById('submergence').textContent = submergence;
document.getElementById('pumpDepth').textContent = `${Math.round(actualPumpDepth)} ft`;
document.getElementById('apiCode').textContent = apiCode;
// Update charts with relevant data
updateCharts(parseFloat(strokesPerMin), swabResult, barrelsPerStroke);
// Update recommendations
updateRecommendations(depth, swabResult, wfl, sfl, pumpSize, plungerSize, parseFloat(strokesPerMin), casingSize, tubingSize);
// Restore button
calcBtn.innerHTML = originalText;
calcBtn.disabled = false;
}, 800);
}
function updateCharts(spm, targetProduction, barrelsPerStroke) {
// Generate performance data based on pump characteristics
const strokes = Array.from({length: 21}, (_, i) => i * 2);
const maxCapacity = strokes.map(s => parseFloat(barrelsPerStroke) * s * 24);
// Fill the required production rate array
const requiredRate = Array(21).fill(targetProduction);
// Update performance chart
performanceChart.data.labels = strokes;
performanceChart.data.datasets[0].data = maxCapacity;
performanceChart.data.datasets[1].data = requiredRate;
performanceChart.update();
}
function updateRecommendations(depth, production, wfl, sfl, pumpSize, plungerSize, spm, casing, tubing) {
const recContainer = document.getElementById('recommendations');
// Calculate some key parameters
const submergence = (wfl / depth) * 100;
const drawDown = sfl ? sfl - wfl : 0;
let recommendations = [];
// Pump size recommendation
recommendations.push(`<strong>Pump Selection:</strong> API Class ${pumpSize} series with ${plungerSize}" plunger is appropriate for your well conditions.`);
// Operating range
if (spm < 6) {
recommendations.push(`<strong>Low Stroke Speed:</strong> At ${spm} SPM, consider a larger pump or increasing stroke length to improve efficiency.`);
} else if (spm > 20) {
recommendations.push(`<strong>High Stroke Speed:</strong> At ${spm} SPM, consider a larger pump or reducing stroke length to minimize wear.`);
} else {
recommendations.push(`<strong>Optimal Operation:</strong> At ${spm} SPM, your pump will operate within the recommended range of 6-20 SPM.`);
}
// Submergence analysis
if (submergence > 85) {
recommendations.push(`<strong>Deep Submergence:</strong> With ${submergence.toFixed(1)}% submergence, gas interference should be minimal.`);
} else if (submergence > 60) {
recommendations.push(`<strong>Moderate Submergence:</strong> At ${submergence.toFixed(1)}% submergence, monitor for potential gas interference.`);
} else {
recommendations.push(`<strong>Shallow Submergence:</strong> With only ${submergence.toFixed(1)}% submergence, gas interference is likely. Consider deeper setting or gas separator.`);
}
// Drawdown analysis if SFL is provided
if (sfl && drawDown > 0) {
recommendations.push(`<strong>Drawdown Analysis:</strong> The ${drawDown.toFixed(0)} ft drawdown indicates good well productivity.`);
if (drawDown / depth > 0.2) {
recommendations.push(`<strong>High Drawdown:</strong> The drawdown represents ${(drawDown/depth*100).toFixed(1)}% of total depth, indicating good reservoir pressure.`);
}
}
// Casing and tubing compatibility
const casingVal = parseFloat(casing);
const tubingVal = parseFloat(tubing);
if (casingVal - tubingVal < 1) {
recommendations.push(`<strong>Clearance Check:</strong> With only ${(casingVal-tubingVal).toFixed(2)}" radial clearance, verify all equipment will pass.`);
}
// Generate recommendations HTML
recContainer.innerHTML = recommendations.map(rec => `<p class="flex items-start"><i class="fas fa-check-circle text-green-500 mr-2 mt-1"></i>${rec}</p>`).join('');
// Add a final note
recContainer.innerHTML += `<p class="text-xs text-gray-500 mt-3">Note: These are general recommendations. Always consult with a pumping unit engineer for final design approval.</p>`;
}
function resetForm() {
// Reset all form fields
document.getElementById('depth').value = '';
document.getElementById('swabResult').value = '';
document.getElementById('wfl').value = '';
document.getElementById('sfl').value = '';
document.getElementById('tubingSize').value = '';
document.getElementById('casingSize').value = '';
document.getElementById('pumpType').value = '';
document.getElementById('specificGravity').value = '0.87';
// Reset results
document.querySelectorAll('#resultsContainer span[id]').forEach(span => {
span.textContent = '-';
});
// Reset charts
performanceChart.data.datasets[0].data = Array(21).fill(0);
performanceChart.data.datasets[1].data = Array(21).fill(0);
performanceChart.update();
tubingChart.data.datasets[0].data = [0, 0];
tubingChart.update();
// Reset displays
document.getElementById('displayTubing').textContent = '-';
document.getElementById('displayCasing').textContent = '-';
document.getElementById('annularVol').textContent = '-';
// Reset recommendations
document.getElementById('recommendations').innerHTML = '<p class="text-gray-700">Enter well parameters and click "Calculate" to view design recommendations.</p>';
}
// Add some sample data to inputs for easier testing
document.getElementById('depth').value = '8500';
document.getElementById('swabResult').value = '650';
document.getElementById('wfl').value = '6700';
document.getElementById('sfl').value = '4500';
document.getElementById('tubingSize').value = '2.875';
document.getElementById('casingSize').value = '5.5';
document.getElementById('pumpType').value = 'D';
</script>
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