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Hydraulic Connector Safety Lock

IP.com Disclosure Number: IPCOM000244127D
Publication Date: 2015-Nov-11
Document File: 3 page(s) / 151K

Publishing Venue

The IP.com Prior Art Database

Abstract

The Wellhead Connection Unit WCU can easily connect to a wellhead with the use of the hydraulic connector designed for the unit The connector requires hydraulic pressure to remain connected to the wellhead while pumping This invention provides a mechanical failsafe that prevents the connector from disengaging while pumping in the event of a hydraulic failure

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Hydraulic Connector Safety Lock

Abstract

     The Wellhead Connection Unit (WCU) can easily connect to a wellhead with the use of the hydraulic connector designed for the unit. The connector requires hydraulic pressure to remain connected to the wellhead while pumping. This invention provides a mechanical failsafe that prevents the connector from disengaging while pumping in the event of a hydraulic failure.

Introduction

     Dynamic conditions while pumping may enable the connector to disengage without hydraulic pressure. A hydraulic pressure monitoring system for the connector may be utilized as a safety feature. The monitoring system is an acceptable solution but a mechanical failsafe provides a higher level of passive protection. The main design challenge for this invention was to retrofit it to the existing unit without changing the physical dimensions or hydraulic system.

Description

     The safety lock clamp is installed on the connector as seen in Figure 1a and 1b. The clamp has two inner halves with a slightly smaller inner diameter than the connector outer diameter. The inner halves have an outer diameter that has a two degree taper. The outer clamp ring has a similar taper. The inner halves are placed on the connector then the outer ring is installed over the inner halves. The taper creates the clamp force necessary to keep the safety lock in place. Lastly, the inner halves and the outer ring are bolted together along with the structure of the safety lock. Then the hydraulic system on the safety lock is connected to the open hydraulic line running to the connector. The close line is unchanged. The hydraulic components on the safety lock consist of a sequence valve and two hydraulic single acting spring push cylinders. The cylinders are spring powered in the push direction and hydraulically powered in the pull direction. The spring is inside of the cylinder so it is protected from the environment making it very reliable. Figures 2 and 3 provide detailed visual representations of the safety lock.

(a) (b)

Figure 1: (a) The connector for the WCU without the safety...