{"id":129,"date":"2025-01-24T14:41:49","date_gmt":"2025-01-24T09:11:49","guid":{"rendered":"https:\/\/rigmen.com\/blog\/?p=129"},"modified":"2025-01-24T14:41:49","modified_gmt":"2025-01-24T09:11:49","slug":"koomey-unit-accumulator","status":"publish","type":"post","link":"https:\/\/rigmen.com\/blog\/equipments\/koomey-unit-accumulator\/","title":{"rendered":"Koomey unit (accumulator)"},"content":{"rendered":"\n<p>A Koomey unit, also known as an accumulator, is&nbsp;<mark>a device that supplies hydraulic power to blowout preventers (BOPs) and other hydraulic equipment<\/mark>.&nbsp;It&#8217;s used in drilling and workover operations.&nbsp;<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"452\" src=\"https:\/\/rigmen.com\/blog\/wp-content\/uploads\/2025\/01\/ezgif.com-webp-to-jpg-converter-1.jpg\" loading=\"lazy\" alt=\"\" class=\"wp-image-131\" srcset=\"https:\/\/rigmen.com\/blog\/wp-content\/uploads\/2025\/01\/ezgif.com-webp-to-jpg-converter-1.jpg 600w, https:\/\/rigmen.com\/blog\/wp-content\/uploads\/2025\/01\/ezgif.com-webp-to-jpg-converter-1-300x226.jpg 300w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure>\n\n\n\n<p>An <strong>accumulator or Koomey<\/strong> <strong>unit<\/strong> is a unit used to hydraulically operate Rams BOP, Annular BOP, HCR and some hydraulic equipment. There are several of high pressure cylinders that store gas (in bladders) and hydraulic fluid or water under pressure for hydraulic activated systems. The primary purpose of this unit is to supply hydraulic power to the BOP stack in order to close\/open BOP stack for both normal operational and emergency situation. Stored hydraulic in the system can provide hydraulic power to close BOP\u2019s in well control operation, therefore, kick volume will be minimized. The accumulator should have sufficient volume to close\/open all preventers and accumulator pressure must be maintained all time. According to API RP53, your reservoir tank should have a total volume at least 2 times of usable volume to close all BOP equipment.<\/p>\n\n\n\n<p><strong>How it works<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The Koomey unit stores hydraulic fluid and gas in cylinders under high pressure.\u00a0<\/li>\n\n\n\n<li>Electric and pneumatic pumps pressurize the fluid and charge the accumulators.\u00a0<\/li>\n\n\n\n<li>Control valves direct the fluid to the BOP.\u00a0<\/li>\n\n\n\n<li>Gauges and regulators monitor and control the pressure.\u00a0<\/li>\n\n\n\n<li>The Koomey unit can be operated remotely from a safe distance.\u00a0<\/li>\n<\/ul>\n\n\n\n<p><strong>What it&#8217;s used for<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The Koomey unit&#8217;s primary purpose is to open and close the BOP stack in normal and emergency situations.\u00a0<\/li>\n\n\n\n<li>In an emergency, the stored hydraulic pressure can quickly close the BOPs to minimize kick volume.\u00a0<\/li>\n<\/ul>\n\n\n\n<p><strong>What it includes\u00a0<\/strong><\/p>\n\n\n\n<p>Accumulators, Pumping system, Manifold system, Reservoir tank, Remote control system, Driller&#8217;s panel, Air cable, Pipe rack, and Protection room.<\/p>\n\n\n\n<p><strong>Pressure based on 3,000 psi surface stack system that you should check on BOP remote panel and koomey unit is listed below:<\/strong><\/p>\n\n\n\n<p>\u2022 Manifold pressure at +\/- 1,500 psi<\/p>\n\n\n\n<p>\u2022 Accumulator pressure at +\/- 3,000 psi<\/p>\n\n\n\n<p>\u2022 Annular preventer at +\/- 500 \u2013 1,500 psi<\/p>\n\n\n\n<p>\u2022 Rig Air at +\/- 100 \u2013 130 psi<\/p>\n\n\n\n<p><strong>There are 4 main components of the Koomey unit as follows:<\/strong><\/p>\n\n\n\n<p>\u2022 Accumulators<\/p>\n\n\n\n<p>\u2022 Pumping system (electric and pneumatic pumps)<\/p>\n\n\n\n<p>\u2022 Manifold system<\/p>\n\n\n\n<p>\u2022 Reservoir tank<\/p>\n\n\n\n<p><strong>According to API RP 53, there must be 2 or 3 independent sources of power that will be available for each closing unit. Typically, you will these following sources:<\/strong><\/p>\n\n\n\n<p>\u2022 Hydraulic with pressure charged in the bottles.<\/p>\n\n\n\n<p>\u2022 Pneumatic<\/p>\n\n\n\n<p>\u2022 Electric<\/p>\n\n\n\n<p><strong>The diagram below demonstrates how the accumulator is lined up for the surface stack.<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"340\" src=\"https:\/\/rigmen.com\/blog\/wp-content\/uploads\/2025\/01\/16-Koomy-1.jpg\" loading=\"lazy\" alt=\"\" class=\"wp-image-130\" srcset=\"https:\/\/rigmen.com\/blog\/wp-content\/uploads\/2025\/01\/16-Koomy-1.jpg 500w, https:\/\/rigmen.com\/blog\/wp-content\/uploads\/2025\/01\/16-Koomy-1-300x204.jpg 300w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/figure>\n\n\n\n<p>Please remember that the diagram is for learning purpose. It may or may not match with your rig configuration. However, the concept of it is the same.<\/p>\n\n\n\n<p><strong>A: Pressure regulator is used to maintain pressure at annular side at 500-1500 psi<\/strong><\/p>\n\n\n\n<p><strong>B: Pressure regulator is used to maintain the manifold pressure at 1,500 psi<\/strong><\/p>\n\n\n\n<p><strong>Blue line<\/strong> for opening equipment as VBR\u2019s, Blind\/Shear Rams, Annular, HCR.<\/p>\n\n\n\n<p><strong>Red line<\/strong> for closing equipment as VBR\u2019s, Blind\/Shear Rams, Annular, HCR.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A Koomey unit, also known as an accumulator, is&nbsp;a device that supplies hydraulic power to blowout preventers (BOPs) and other hydraulic equipment.&nbsp;It&#8217;s used in drilling&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[59,25],"tags":[75,74],"class_list":["post-129","post","type-post","status-publish","format-standard","hentry","category-drilling","category-equipments","tag-accumulator","tag-koomey-unit"],"_links":{"self":[{"href":"https:\/\/rigmen.com\/blog\/wp-json\/wp\/v2\/posts\/129","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/rigmen.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/rigmen.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/rigmen.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/rigmen.com\/blog\/wp-json\/wp\/v2\/comments?post=129"}],"version-history":[{"count":1,"href":"https:\/\/rigmen.com\/blog\/wp-json\/wp\/v2\/posts\/129\/revisions"}],"predecessor-version":[{"id":132,"href":"https:\/\/rigmen.com\/blog\/wp-json\/wp\/v2\/posts\/129\/revisions\/132"}],"wp:attachment":[{"href":"https:\/\/rigmen.com\/blog\/wp-json\/wp\/v2\/media?parent=129"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rigmen.com\/blog\/wp-json\/wp\/v2\/categories?post=129"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rigmen.com\/blog\/wp-json\/wp\/v2\/tags?post=129"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}