diff --git a/AsbCloudApp/Repositories/ITelemetryDataCache.cs b/AsbCloudApp/Repositories/ITelemetryDataCache.cs
index 0bc73275..78f7008b 100644
--- a/AsbCloudApp/Repositories/ITelemetryDataCache.cs
+++ b/AsbCloudApp/Repositories/ITelemetryDataCache.cs
@@ -43,6 +43,13 @@ namespace AsbCloudApp.Repositories
         /// <returns></returns>
         IEnumerable<TDto>? GetOrDefault(int idTelemetry, TelemetryDataRequest request);
 
+        /// <summary>
+        /// Диапазон дат находящийся в кеше
+        /// </summary>
+        /// <param name="idTelemetry"></param>
+        /// <returns></returns>
+        DatesRangeDto? GetOrDefaultCachedaDateRange(int idTelemetry);
+
         /// <summary>
         /// Получить диапазон дат телеметрии.
         /// Дата первой записи телеметрии храниться отдельно и запоняется при инициализации
diff --git a/AsbCloudApp/Services/ITelemetryDataService.cs b/AsbCloudApp/Services/ITelemetryDataService.cs
index 154986b4..583da43e 100644
--- a/AsbCloudApp/Services/ITelemetryDataService.cs
+++ b/AsbCloudApp/Services/ITelemetryDataService.cs
@@ -37,13 +37,21 @@ namespace AsbCloudApp.Services
         Task<IEnumerable<TDto>> GetAsync(int idWell, TelemetryDataRequest request, CancellationToken token);
 
         /// <summary>
-        /// Получение периода за период
+        /// Период за который есть данные по скважине в рамках временного интервала
         /// </summary>
         /// <param name="idWell"></param>
-        /// <param name="start"></param>
-        /// <param name="end"></param>
+        /// <param name="geDate"></param>
+        /// <param name="leDate"></param>
+        /// <param name="token"></param>
         /// <returns></returns>
-        DatesRangeDto? GetRange(int idWell, DateTimeOffset start, DateTimeOffset end);
+        Task<DatesRangeDto> GetRangeAsync(int idWell, DateTimeOffset geDate, DateTimeOffset? leDate, CancellationToken token);
+
+        /// <summary>
+        /// Период за который есть данные по скважине
+        /// </summary>
+        /// <param name="idWell"></param>
+        /// <returns></returns>
+        DatesRangeDto? GetRange(int idWell);
 
         /// <summary>
         /// добавить/изменить данные тех. процесса (используется панелью)
diff --git a/AsbCloudInfrastructure/Services/SAUB/TelemetryDataBaseService.cs b/AsbCloudInfrastructure/Services/SAUB/TelemetryDataBaseService.cs
index 649f03de..a837ae04 100644
--- a/AsbCloudInfrastructure/Services/SAUB/TelemetryDataBaseService.cs
+++ b/AsbCloudInfrastructure/Services/SAUB/TelemetryDataBaseService.cs
@@ -1,4 +1,5 @@
 using AsbCloudApp.Data;
+using AsbCloudApp.Exceptions;
 using AsbCloudApp.Repositories;
 using AsbCloudApp.Services;
 using AsbCloudDb;
@@ -204,28 +205,60 @@ namespace AsbCloudInfrastructure.Services.SAUB
         }
 
         /// <inheritdoc/>
-        public DatesRangeDto? GetRange(int idWell, DateTimeOffset start, DateTimeOffset end)
+        public async Task<DatesRangeDto> GetRangeAsync(int idWell, DateTimeOffset geDate, DateTimeOffset? leDate, CancellationToken token)
+        {
+            var telemetry = telemetryService.GetOrDefaultTelemetryByIdWell(idWell) 
+                ?? throw new ArgumentInvalidException(nameof(idWell), $"По скважине id:{idWell} нет телеметрии");
+
+            if ((DateTimeOffset.UtcNow - geDate) < TimeSpan.FromHours(12))
+            {
+                // пробуем обойтись кешем
+                var cechedRange = telemetryDataCache.GetOrDefaultCachedaDateRange(telemetry.Id);
+                if (cechedRange?.From <= geDate)
+                {
+                    var datesRange = new DatesRangeDto
+                    {
+                        From = geDate.DateTime,
+                        To = cechedRange.To
+                    };
+                    if (leDate.HasValue && leDate > geDate)
+                        datesRange.To = leDate.Value.Date;
+                    return datesRange;
+                }
+            }
+
+            var query = db.Set<TEntity>()
+                .Where(entity => entity.IdTelemetry == telemetry.Id)
+                .Where(entity => entity.DateTime >= geDate.ToUniversalTime());
+
+            if(leDate.HasValue)
+                query = query.Where(entity => entity.DateTime <= leDate.Value.ToUniversalTime());
+
+            var gquery = query
+                .GroupBy(entity => entity.IdTelemetry)
+                .Select(group => new
+                {
+                    MinDate = group.Min(entity => entity.DateTime),
+                    MaxDate = group.Max(entity => entity.DateTime),
+                });
+
+            var result = await gquery.FirstAsync(token);
+
+            var range = new DatesRangeDto
+            {
+                From = result.MinDate.ToOffset(TimeSpan.FromHours(telemetry.TimeZone!.Hours)).DateTime,
+                To = result.MaxDate.ToOffset(TimeSpan.FromHours(telemetry.TimeZone!.Hours)).DateTime,
+            };
+            return range;
+        }
+
+        public DatesRangeDto? GetRange(int idWell)
         {
             var telemetry = telemetryService.GetOrDefaultTelemetryByIdWell(idWell);
             if (telemetry is null)
                 return default;
 
-            var datesRange = telemetryDataCache.GetOrDefaultDataDateRange(telemetry.Id);
-
-            if (datesRange is null)
-                return null;
-
-            var from = datesRange.From > start.DateTime
-                ? datesRange.From : start.DateTime;
-
-            var to = datesRange.To < end.DateTime
-                ? datesRange.To : end.DateTime;
-
-            return new DatesRangeDto
-            {
-                From = from,
-                To = to,
-            };
+            return telemetryDataCache.GetOrDefaultDataDateRange(telemetry.Id);
         }
 
         public abstract TDto Convert(TEntity src, double timezoneOffset);
diff --git a/AsbCloudInfrastructure/Services/SAUB/TelemetryDataCache.cs b/AsbCloudInfrastructure/Services/SAUB/TelemetryDataCache.cs
index 0946de01..eabfcf77 100644
--- a/AsbCloudInfrastructure/Services/SAUB/TelemetryDataCache.cs
+++ b/AsbCloudInfrastructure/Services/SAUB/TelemetryDataCache.cs
@@ -147,6 +147,20 @@ namespace AsbCloudInfrastructure.Services.SAUB
             return new DatesRangeDto { From = from.Value, To = to };
         }
 
+        public DatesRangeDto? GetOrDefaultCachedaDateRange(int idTelemetry)
+        {
+            if (!caches.TryGetValue(idTelemetry, out TelemetryDataCacheItem? cacheItem))
+                return null;
+
+            if (cacheItem.LastData.Count < 2)
+                return null;
+
+            var to = cacheItem.LastData[^1].DateTime;
+            var from = cacheItem.LastData[0].DateTime;
+
+            return new DatesRangeDto { From = from, To = to };
+        }
+
         public (TDto First, TDto Last)? GetOrDefaultFirstLast(int idTelemetry)
         {
             if (!caches.TryGetValue(idTelemetry, out TelemetryDataCacheItem? cacheItem))
diff --git a/AsbCloudWebApi/Controllers/SAUB/TelemetryDataBaseController.cs b/AsbCloudWebApi/Controllers/SAUB/TelemetryDataBaseController.cs
index 4649d91d..21efdcde 100644
--- a/AsbCloudWebApi/Controllers/SAUB/TelemetryDataBaseController.cs
+++ b/AsbCloudWebApi/Controllers/SAUB/TelemetryDataBaseController.cs
@@ -131,15 +131,15 @@ namespace AsbCloudWebApi.Controllers.SAUB
         /// Возвращает диапазон дат за которые есть телеметрия за период времени
         /// </summary>
         /// <param name="idWell"></param>
-        /// <param name="start"></param>
-        /// <param name="end"></param>
+        /// <param name="geDate"></param>
+        /// <param name="leDate"></param>
         /// <param name="token"></param>
         /// <returns></returns>
         [HttpGet("{idWell}/dateRange")]
         public virtual async Task<ActionResult<DatesRangeDto?>> GetRangeAsync(
             [FromRoute] int idWell,
-            [Required] DateTimeOffset start,
-            [Required] DateTimeOffset end,
+            [Required] DateTimeOffset geDate,
+            DateTimeOffset? leDate,
             CancellationToken token)
         {
             int? idCompany = User.GetCompanyId();
@@ -153,7 +153,7 @@ namespace AsbCloudWebApi.Controllers.SAUB
             if (!isCompanyOwnsWell)
                 return Forbid();
 
-            var content = telemetryDataService.GetRange(idWell, start, end);
+            var content = await telemetryDataService.GetRangeAsync(idWell, geDate, leDate, token);
 
             return Ok(content);
         }
diff --git a/AsbCloudWebApi/Controllers/Subsystems/SubsystemOperationTimeController.cs b/AsbCloudWebApi/Controllers/Subsystems/SubsystemOperationTimeController.cs
index 0cf8250a..d5bf4aae 100644
--- a/AsbCloudWebApi/Controllers/Subsystems/SubsystemOperationTimeController.cs
+++ b/AsbCloudWebApi/Controllers/Subsystems/SubsystemOperationTimeController.cs
@@ -68,7 +68,7 @@ namespace AsbCloudWebApi.Controllers.Subsystems
             if (!await UserHasAccesToWellAsync(idWell, token))
                 return Forbid();
 
-            var dateRange = telemetryDataSaubService.GetRange(idWell, DateTimeOffset.MinValue, DateTimeOffset.MaxValue);
+            var dateRange = telemetryDataSaubService.GetRange(idWell);
 
             return Ok(dateRange);
         }