diff --git a/AsbCloudInfrastructure/Background/BackgroundWorker.cs b/AsbCloudInfrastructure/Background/BackgroundWorker.cs
index beaca27e..f56b0ae4 100644
--- a/AsbCloudInfrastructure/Background/BackgroundWorker.cs
+++ b/AsbCloudInfrastructure/Background/BackgroundWorker.cs
@@ -52,17 +52,6 @@ public class BackgroundWorker : BackgroundService
         this.serviceProvider = serviceProvider;
     }
 
-    /// <summary>
-    /// Добавить в очередь
-    /// </summary>
-    /// <param name="work"></param>
-    public void Enqueue(Work work)
-    {
-        works.Enqueue(work);
-        if (ExecuteTask is null || ExecuteTask.IsCompleted)
-            StartAsync(CancellationToken.None).Wait();
-    }
-
     protected override async Task ExecuteAsync(CancellationToken token)
     {
         while (!token.IsCancellationRequested && works.TryDequeue(out CurrentWork))
@@ -94,12 +83,27 @@ public class BackgroundWorker : BackgroundService
         }
     }
 
+    /// <summary>
+    /// Добавить в очередь
+    /// <para>
+    /// work.Id может быть не уникальным,
+    /// при этом метод TryRemoveFromQueue удалит все работы с совпадающими id
+    /// </para>
+    /// </summary>
+    /// <param name="work"></param>
+    public void Enqueue(Work work)
+    {
+        works.Enqueue(work);
+        if (ExecuteTask is null || ExecuteTask.IsCompleted)
+            StartAsync(CancellationToken.None).Wait();
+    }
+
     /// <summary>
     /// Удаление работы по ID из одноразовой очереди
     /// </summary>
     /// <param name="id"></param>
     /// <returns></returns>
-    public bool TryRemoveFromRunOnceQueue(string id)
+    public bool TryRemoveFromQueue(string id)
     {
         var work = Works.FirstOrDefault(w => w.Id == id);
         if (work is not null)
diff --git a/AsbCloudInfrastructure/Background/PeriodicBackgroundWorker.cs b/AsbCloudInfrastructure/Background/PeriodicBackgroundWorker.cs
index fd12c13a..a7490ed7 100644
--- a/AsbCloudInfrastructure/Background/PeriodicBackgroundWorker.cs
+++ b/AsbCloudInfrastructure/Background/PeriodicBackgroundWorker.cs
@@ -14,8 +14,8 @@ namespace AsbCloudInfrastructure.Background;
 /// </summary>
 public class PeriodicBackgroundWorker : BackgroundService
 {
-    private static readonly TimeSpan executePeriod = TimeSpan.FromSeconds(10);
-    private static readonly TimeSpan minDelay = TimeSpan.FromSeconds(1);
+    private readonly TimeSpan executePeriod = TimeSpan.FromSeconds(10);
+    private readonly TimeSpan minDelay = TimeSpan.FromSeconds(1);
     private readonly IServiceProvider serviceProvider;
 
     private readonly List<WorkPeriodic> works = new(8);
@@ -97,6 +97,8 @@ public class PeriodicBackgroundWorker : BackgroundService
     {
         var periodic = new WorkPeriodic(work, period);
         works.Add(periodic);
+        if (ExecuteTask is null || ExecuteTask.IsCompleted)
+            StartAsync(CancellationToken.None).Wait();
     }
 
     private WorkPeriodic? GetNext()
diff --git a/AsbCloudInfrastructure/DependencyInjection.cs b/AsbCloudInfrastructure/DependencyInjection.cs
index 93c6575e..28bde671 100644
--- a/AsbCloudInfrastructure/DependencyInjection.cs
+++ b/AsbCloudInfrastructure/DependencyInjection.cs
@@ -165,6 +165,7 @@ namespace AsbCloudInfrastructure
 		  services.AddSingleton<ITelemetryDataCache<TelemetryDataSaubDto>>(provider => TelemetryDataCache<TelemetryDataSaubDto>.GetInstance<TelemetryDataSaub>(provider));
 		  services.AddSingleton<ITelemetryDataCache<TelemetryDataSpinDto>>(provider => TelemetryDataCache<TelemetryDataSpinDto>.GetInstance<TelemetryDataSpin>(provider));
 		  services.AddSingleton<IRequerstTrackerService, RequestTrackerService>();
+		  services.AddSingleton<PeriodicBackgroundWorker>();
 		  services.AddSingleton<BackgroundWorker>();
 		  services.AddSingleton<NotificationBackgroundWorker>();
 		  services.AddSingleton<IReduceSamplingService>(provider => ReduceSamplingService.GetInstance(configuration));
diff --git a/AsbCloudInfrastructure/Services/DrillingProgram/DrillingProgramService.cs b/AsbCloudInfrastructure/Services/DrillingProgram/DrillingProgramService.cs
index 5557707d..c91689a3 100644
--- a/AsbCloudInfrastructure/Services/DrillingProgram/DrillingProgramService.cs
+++ b/AsbCloudInfrastructure/Services/DrillingProgram/DrillingProgramService.cs
@@ -556,7 +556,7 @@ namespace AsbCloudInfrastructure.Services.DrillingProgram
         private async Task<int> RemoveDrillingProgramAsync(int idWell, CancellationToken token)
         {
             var workId = MakeWorkId(idWell);
-            backgroundWorker.TryRemoveFromRunOnceQueue(workId);
+            backgroundWorker.TryRemoveFromQueue(workId);
 
             var filesIds = await context.Files
                 .Where(f => f.IdWell == idWell &&
diff --git a/AsbCloudWebApi.Tests/Services/BackgroundWorkertest.cs b/AsbCloudWebApi.Tests/Services/BackgroundWorkertest.cs
index a5690d84..0f54dddf 100644
--- a/AsbCloudWebApi.Tests/Services/BackgroundWorkertest.cs
+++ b/AsbCloudWebApi.Tests/Services/BackgroundWorkertest.cs
@@ -1,16 +1,7 @@
-using AsbCloudApp.Data;
-using AsbCloudApp.Data.SAUB;
-using AsbCloudApp.Repositories;
-using AsbCloudApp.Requests;
-using AsbCloudApp.Services;
-using AsbCloudInfrastructure.Background;
-using AsbCloudInfrastructure.Services;
-using AsbCloudInfrastructure.Services.SAUB;
+using AsbCloudInfrastructure.Background;
 using Microsoft.Extensions.DependencyInjection;
 using NSubstitute;
 using System;
-using System.Collections.Generic;
-using System.Linq;
 using System.Reflection;
 using System.Threading;
 using System.Threading.Tasks;
@@ -18,12 +9,12 @@ using Xunit;
 
 namespace AsbCloudWebApi.Tests.Services;
 
-public class BackgroundWorkertest
+public class BackgroundWorkerTest
 {
     private IServiceProvider provider;
     private BackgroundWorker service;
 
-    public BackgroundWorkertest()
+    public BackgroundWorkerTest()
     {
         provider = Substitute.For<IServiceProvider, ISupportRequiredService>();
         var serviceScope = Substitute.For<IServiceScope>();
@@ -33,7 +24,7 @@ public class BackgroundWorkertest
 
         service = new BackgroundWorker(provider);        
         typeof(BackgroundWorker)
-            .GetField("minDelay", BindingFlags.NonPublic | BindingFlags.Instance)?
+            .GetField("minDelay", BindingFlags.NonPublic | BindingFlags.Instance)
             .SetValue(service, TimeSpan.FromMilliseconds(1));
     }
 
@@ -55,11 +46,8 @@ public class BackgroundWorkertest
             service.Enqueue(work);
         }
 
-        var waitI = workCount;
-        await Task.Delay(1_000);
-        //while (waitI-- > 0 && service.ExecuteTask is not null && service.ExecuteTask.IsCompleted) 
-        //    await Task.Delay(4);
-        
+        await service.ExecuteTask;
+
         //assert
         Assert.Equal(workCount, result);
     }
@@ -69,15 +57,16 @@ public class BackgroundWorkertest
     {
         var expectadResult = 42;
         var result = 0;
+
         Task workAction(string id, IServiceProvider services, Action<string, double?> callback, CancellationToken token)
         {
             result = expectadResult;
             return Task.CompletedTask;
         }
+        var goodWork = Work.CreateByDelegate("", workAction);
 
         Task failAction(string id, IServiceProvider services, Action<string, double?> callback, CancellationToken token)
             => throw new Exception();
-        var goodWork = Work.CreateByDelegate("", workAction);
 
         var badWork = Work.CreateByDelegate("", failAction);
         badWork.OnErrorAsync = (id, exception, token) => throw new Exception();
@@ -85,9 +74,40 @@ public class BackgroundWorkertest
         //act
         service.Enqueue(badWork);
         service.Enqueue(goodWork);
-        await Task.Delay(1200);
+        
+        await service.ExecuteTask;
 
         //assert
         Assert.Equal(expectadResult, result);
+        Assert.Equal(1, service.Felled.Count);
+        Assert.Equal(1, service.Done.Count);
+    }
+
+    [Fact]
+    public async Task TryRemove()
+    {
+        var workCount = 5;
+        var result = 0;
+        Task workAction(string id, IServiceProvider services, Action<string, double?> callback, CancellationToken token)
+        {
+            result++;
+            return Task.Delay(10);
+        }
+
+        //act
+        for (int i = 0; i < workCount; i++)
+        {
+            var work = Work.CreateByDelegate(i.ToString(), workAction);
+            service.Enqueue(work);
+        }
+
+        var removed = service.TryRemoveFromQueue((workCount - 1).ToString());
+
+        await service.ExecuteTask;
+
+        //assert
+        Assert.True(removed);
+        Assert.Equal(workCount - 1, result);
+        Assert.Equal(workCount - 1, service.Done.Count);
     }
 }
diff --git a/AsbCloudWebApi.Tests/Services/PeriodicBackgroundWorkerTest.cs b/AsbCloudWebApi.Tests/Services/PeriodicBackgroundWorkerTest.cs
new file mode 100644
index 00000000..d0c16285
--- /dev/null
+++ b/AsbCloudWebApi.Tests/Services/PeriodicBackgroundWorkerTest.cs
@@ -0,0 +1,97 @@
+using AsbCloudInfrastructure.Background;
+using DocumentFormat.OpenXml.Drawing.Charts;
+using Microsoft.Extensions.DependencyInjection;
+using NSubstitute;
+using System;
+using System.Diagnostics;
+using System.Reflection;
+using System.Threading;
+using System.Threading.Tasks;
+using Xunit;
+
+namespace AsbCloudWebApi.Tests.Services;
+
+public class PeriodicBackgroundWorkerTest
+{
+    private IServiceProvider provider;
+    private PeriodicBackgroundWorker service;
+
+    public PeriodicBackgroundWorkerTest()
+    {
+        provider = Substitute.For<IServiceProvider, ISupportRequiredService>();
+        var serviceScope = Substitute.For<IServiceScope>();
+        var serviceScopeFactory = Substitute.For<IServiceScopeFactory>();
+        serviceScopeFactory.CreateScope().Returns(serviceScope);
+        ((ISupportRequiredService)provider).GetRequiredService(typeof(IServiceScopeFactory)).Returns(serviceScopeFactory);
+
+        service = new PeriodicBackgroundWorker(provider);
+        typeof(PeriodicBackgroundWorker)
+            .GetField("minDelay", BindingFlags.NonPublic | BindingFlags.Instance)?
+            .SetValue(service, TimeSpan.FromMilliseconds(1));
+
+        typeof(PeriodicBackgroundWorker)
+            .GetField("executePeriod", BindingFlags.NonPublic | BindingFlags.Instance)?
+            .SetValue(service, TimeSpan.FromMilliseconds(1));
+    }
+
+    [Fact]
+    public async Task WorkRunsTwice()
+    {
+        var workCount = 2;
+        var periodMs = 100d;
+
+        var period = TimeSpan.FromMilliseconds(periodMs);
+
+        var result = 0;
+        Task workAction(string id, IServiceProvider services, Action<string, double?> callback, CancellationToken token)
+        {
+            result++;
+            return Task.CompletedTask;
+        }
+
+        //act        
+        var work = Work.CreateByDelegate("", workAction);
+
+        var stopwatch = Stopwatch.StartNew();
+        service.Add(work, period);
+
+        var delay = (periodMs / 20) + (periodMs * workCount) - stopwatch.ElapsedMilliseconds;
+        await Task.Delay(TimeSpan.FromMilliseconds(delay));
+
+        //assert
+        Assert.Equal(workCount, result);
+    }
+
+
+    [Fact]
+    public async Task Enqueue_continues_after_exceptions()
+    {
+        var expectadResult = 42;
+        var result = 0;
+
+        Task workAction(string id, IServiceProvider services, Action<string, double?> callback, CancellationToken token)
+        {
+            result = expectadResult;
+            return Task.CompletedTask;
+        }
+        var goodWork = Work.CreateByDelegate("", workAction);
+
+        Task failAction(string id, IServiceProvider services, Action<string, double?> callback, CancellationToken token)
+            => throw new Exception();
+
+        var badWork = Work.CreateByDelegate("", failAction);
+        badWork.OnErrorAsync = (id, exception, token) => throw new Exception();
+
+        //act
+        service.Add(badWork, TimeSpan.FromSeconds(2));
+        service.Add(goodWork, TimeSpan.FromSeconds(2));
+
+        await Task.Delay(TimeSpan.FromMilliseconds(20));
+
+        //assert
+        Assert.Equal(expectadResult, result);
+        Assert.Equal(1, badWork.CountErrors);
+        Assert.Equal(1, goodWork.CountComplete);
+        Assert.Equal(1, goodWork.CountStart);
+    }
+}
diff --git a/AsbCloudWebApi.Tests/Services/WorkTest.cs b/AsbCloudWebApi.Tests/Services/WorkTest.cs
new file mode 100644
index 00000000..ea826565
--- /dev/null
+++ b/AsbCloudWebApi.Tests/Services/WorkTest.cs
@@ -0,0 +1,126 @@
+using AsbCloudInfrastructure.Background;
+using Microsoft.Extensions.DependencyInjection;
+using NSubstitute;
+using System;
+using System.Threading;
+using System.Threading.Tasks;
+using Xunit;
+
+namespace AsbCloudWebApi.Tests.Services
+{
+    public class WorkTest
+    {
+        private IServiceProvider provider;
+
+        public WorkTest()
+        {
+            provider = Substitute.For<IServiceProvider, ISupportRequiredService>();
+            var serviceScope = Substitute.For<IServiceScope>();
+            var serviceScopeFactory = Substitute.For<IServiceScopeFactory>();
+            serviceScopeFactory.CreateScope().Returns(serviceScope);
+            ((ISupportRequiredService)provider).GetRequiredService(typeof(IServiceScopeFactory)).Returns(serviceScopeFactory);
+        }
+
+        [Fact]
+        public async Task Work_done_with_success()
+        {
+            Task workAction(string id, IServiceProvider services, Action<string, double?> callback, CancellationToken token)
+                => Task.CompletedTask;
+            
+            var work = Work.CreateByDelegate("", workAction);
+
+            //act
+            var begin = DateTime.Now;
+            await work.Start(provider, CancellationToken.None);
+            var done = DateTime.Now;
+            var executionTime = done - begin;
+
+            //assert
+            Assert.Equal(1, work.CountComplete);
+            Assert.Equal(1, work.CountStart);
+            Assert.Equal(0, work.CountErrors);
+            Assert.Null(work.CurrentState);
+            Assert.Null(work.LastError);
+
+            var lastState = work.LastComplete;
+            Assert.NotNull(lastState);
+            Assert.InRange(lastState.Start, begin, done - 0.5 * executionTime);
+            Assert.InRange(lastState.End, done - 0.5 * executionTime, done);
+            Assert.InRange(lastState.ExecutionTime, TimeSpan.Zero, executionTime);
+        }
+
+        [Fact]
+        public async Task Work_calls_callback()
+        {
+            var expectedState = "42";
+            var expectedProgress = 42d;
+
+            var timeout = TimeSpan.FromMilliseconds(40);
+
+            Task workAction(string id, IServiceProvider services, Action<string, double?> callback, CancellationToken token)
+            {
+                callback.Invoke(expectedState, expectedProgress);
+                return Task.Delay(timeout);
+            }
+
+            var work = Work.CreateByDelegate("", workAction);
+
+            //act
+            var begin = DateTime.Now;
+            _ = work.Start(provider, CancellationToken.None);
+            await Task.Delay(timeout/3);
+
+            //assert
+            Assert.Equal(0, work.CountComplete);
+            Assert.Equal(1, work.CountStart);
+            Assert.Equal(0, work.CountErrors); 
+            Assert.NotNull(work.CurrentState);
+            Assert.Null(work.LastComplete);
+            Assert.Null(work.LastError);
+
+            var currentState = work.CurrentState;
+            Assert.NotNull(currentState);
+            Assert.InRange(currentState.Start, begin, begin + timeout);
+            Assert.InRange(currentState.StateUpdate, begin, begin + timeout);
+            Assert.Equal(expectedState, currentState.State);
+            Assert.Equal(expectedProgress, currentState.Progress);
+        }
+
+
+        [Fact]
+        public async Task Work_fails_with_info()
+        {
+            var expectedState = "41";
+            var expectedErrorText = "42";
+            var minWorkTime = TimeSpan.FromMilliseconds(10);
+
+            async Task workAction(string id, IServiceProvider services, Action<string, double?> callback, CancellationToken token)
+            {
+                await Task.Delay(minWorkTime);
+                callback(expectedState, 0);
+                throw new Exception(expectedErrorText);
+            }
+            
+            var work = Work.CreateByDelegate("", workAction);
+
+            //act
+            var begin = DateTime.Now;
+            await work.Start(provider, CancellationToken.None);
+            
+            //assert
+            Assert.Equal(0, work.CountComplete);
+            Assert.Equal(1, work.CountStart);
+            Assert.Equal(1, work.CountErrors);
+            Assert.Null(work.CurrentState);
+            Assert.Null(work.LastComplete);
+
+            var error = work.LastError;
+            Assert.NotNull(error);
+            Assert.InRange(error.Start, begin, DateTime.Now);
+            Assert.InRange(error.End, begin, DateTime.Now);
+            Assert.InRange(error.ExecutionTime, minWorkTime, DateTime.Now - begin);
+            Assert.Contains(expectedErrorText, error.ErrorText, StringComparison.InvariantCultureIgnoreCase);
+            Assert.Equal(expectedState, error.State);
+        }
+    }
+}