Bowen high pressure casing patch

Casing reline packer patches there are two types of expandable casing reline packer patches. Whether the prcp is mechanically or hydraulically set, the assembly can be released by engaging a spear into the i. Operation the bowen high pressure casing patch as indicated is used to repair a damaged casing string by replacement of the damaged section, without having to remove the entire string of. Total pickup distance from start to finish is approximately 24 ft.

Development of a gastight external casing patch using. Other designs have used opposed chevron seals in what is known as a high pressure packoff assembly such as that sold by baker oil tools under product no. The flexible fin or fins provide a metaltometal seal to the outer surface of the casing patch and a grip assembly holds the. The bowen high pressure casing patch is composed of four outside parts and six internal parts.

Deepwater highpressure underwater wellhead casing patch. The casing patch as claimed in claim 1 wherein the pressurebased subsystem is further in operable communication with at least a portion of an anchor system. The bowen high pressure casing patch is composed of three outside parts and five internal parts. The casing stub is prepared with a dressing tool containing a special mill to obtain the requisite finish on its outer surface prior to insertion of the casing patch.

Other designs, such as the baker oil tools high pressure packoff. Casing patch well 16xcd casing patch the technique is applied in wells where the casing is in poor bonding, consists of removing the casing into disrepair, and replace it with new casing. W2000 w2001 w2002 w2003 w2004 w2005 w2006 bowen no. Casing patches bowen packer type external 14 bowen lead seal external 59 internalhomco 129 cutters bowen hydraulic external 122124 bowen internal 1116 external mechanical 117121 he dh washover 125 d drill collar weights 789 j jars anadrillschlumberger tr,dc, fb jar specifications 87 bowen jar intensifier 81 bowen. At this point the effectiveness of the lead seal may be checked by the application of pump pressure. The casing patch design leaves the operator with a casing string that has a fullbore internal diameter.

Post jobs, find pros, and collaborate commissionfree in our professional marketplace. Houston logans new 15k psi highpressure casing patches are designed to repair damaged casing in highpressure environments. The casing head pressure is the pressure on the casing, which is measured at the. Available for more than 60 different sizes and weights of tubing and casing and in a large range of casing sizes, this patch provides a longlasting alternative to. This simplicity of design is matched by the simple operation. Simply lower the cutter, apply air pressure, and rotate.

Logan oil tools does not sell, or offer to sell, national oilwell varco bowen products. A downhole assembly or tool system used in the remedial repair of casing damage, corrosion or leaks. During the comment period, mms received three comments. High pressure type l packer type casing patches rubicon oilfield. To view additional data on our casing patch technology, select menu item. Logan high pressure type l packer type casing patches will not restrict the bore of the casing and are available.

It may also be caused by defect and leaking tubing connections, downhole. This paper describes the design, development and testing of an external casing patch system for installation in an offshore well to repair damaged 9 58 inch casing. The prcp retrievable casing patch is set hydraulically by applying a predetermined pressure through a special hydraulic setting tool which engages the slips and ratchet system and completes the element packoff. The comment period for the proposed rule was open for 60 days. With an extensive background in research and development, mohawk energy is uniquely qualified to develop, manufacture, and install tubular expansion technologies that solve energy producers most critical downhole challenges. In some cases, such as in depleted wells nearing the end of viable production, a liner patch may be the only economic means of safely returning the. Bowen casing rollers the bowen casing roller is very rugged yet simple in design. Download weatherford expandable casing patch directorybackup. It is run on tubing, drill pipe, and smart coiled tubing. The casing patch as claimed in claim 8 wherein the pressure is automatically applied upon contact between the pressurebased subsystem of the patch and the target stub. The casing repair was required to have an effective metaltometal seal to hold lift gas injection pressure together with the potential for increasing levels of h 2 s during the.

High pressure casing patch baker hughes incorporated. A casing patch is disclosed which uses one or more fins which elastically flex to accept a casing stub. We look to provide the best casing patch, refrac, and reline mns technologies to every project. Custom adapters and cutters too holte works with you. Sustained casing pressure scp scp is excessive casing pressures in wells that persistently rebuilds after bleeddown. The union between the well casing and the casing is installed through the casing patch lead seal, the annulus can be cemented to surface. Bowen packer type tubing and casing patches, bowen lwad seal tubing and casing patches, date unknown. It makes the junction between a replacement section and the rest of string in the hole, without removing the entire string of casing. On july 31, 2009, mms published the proposed rule annular casing pressure management for offshore wells 74 fr 38147. Casing cutters cut casing at depth, underwater, in 2 min or less. When the workstirng is pulled through the patch with a force of 35,000 to 45,000 lbf, the patch expands and creates a seal across the repaired casing interval. All moving parts are held in place on the mandrel by large ball bearings running in deep grooves. These patches are run on electric wireline, tubing, or coil tubing and set with a pressure setting tool electrical, mechanical, or hydraulic.

The fitforpurpose technique selected to minimize the operational and financial impact of having highrisk, unusable gas wells was a external casing patch. Manual f645 logan lead seal cementing casing patch page 5 maintenance since the logan lead seal cementing casing patch is not normally reused, usual maintenance procedures do not apply. Casing pressure is the pressure in a well that exists between the casing and tubing or. The spear is designed to carry very high loads and to. A downhole assembly or tool system used in the repair of liner damage, corrosion or leaks. This simplicity of design is matched by the simple positive operation. However, if the lead seal cementing casing patch is to be stored for a period of time before it is used, the tool should be disassembled, thorough. Corrosion, joint failure, fracture cross flow between adjacent wells from watson, paper 2004297petroleum societys 5th canadian international petroleum conference. Logan high pressure type l packer type casing patches are designed to engage and seal off a properly prepared casing string. Thrutubing systems tts is an engineering, manufacturing, and service company specializing in thrutubing workovercompletion systems, sand control systems and cased hole systems xspan. Rated for 15,000psi 103 mpa working pressure, the logan 15k psi high pressure casing patch can seal internal and external pressure without restricting the bores internal diameter, according to the company.

Liquid loading of the production tubing with water and natural gasoline condensate. Oildatas tubingcasing patches, designed from proven and patented technology, provide a heavyduty, permanent seal over splits, holes, or perforations in tubing and casing and are ideal for water shut off. Restriction to flow down hole such as occurs when sand covers the perforations in the casing. The model pj straddle packer assembly is a tandem packer type selective tool used to isolate a predetermined length of perforations for stimulation or testing purposes. Composite catalog, bowen packer type tubing and casing patches. Annular casing pressure management for offshore wells. Lead seal cementing casing patch home rubicon oilfield. It is designed to form a permanent sealed connection between two strings of tubing or casing and can be cemented. Fishing services catalog weatherford international.

This setting load will vary from 10,000 pounds to in excess of 100,000 pounds. Casing patches are most frequently used as short to mediumterm repairs that enable production to be resumed until a major workover operation is scheduled. In long term abandonment or ultrahigh pressure applications it is recommended to place at least 30ft 9m of cement on top of the plug. Casing head pressure definition and meaning collins. Increasing gas flow at wellhead hydrocarbon compression. Water bore well casing reline ripe inflatable packers. An appropriate setting load table may be found on page 6 of this manual. At depth the patch is expanded using a high pressure inflatable packer, and pushed against the casing to activate the outer seals.

If you have a bridge plug application or any questions about this system please contact our tech services department for assistance. Backpressure on the wellhead tree caused by such factors as high pressure in the gas collection header piping. Weatherford internal casing patch, and similar downhole tools. Casing pressure is the pressure required in drill pipes or tubing annulus in order to maintain smooth well control operations. Casing patch will depend on the size of the casing patch. Liner patches are most frequently used as short to mediumterm repairs that enable production to be resumed until a major workover operation is scheduled. Two comments were in favor of this rule and the remaining comment was not associated with this rulemaking. It is used to restore collapsed casing to its normal internal diameter. Education well bring you lunch and tell you how our expandables can provide solutions for your well construction, casing integrity, and well completionrecompletion challenges. Bowen high pressure casing patches will not restrict the bore of the casing or tubing in any manner. The high pressure packer is then inflated beside it to cement the reinforced rubber casing patch into its permanent position and plug the holes and leaks. Pioneer oil tools maintain a suite of tools for restoring damaged casing to a func.

Logan releases new 15k psi casing patches offshore. Casing patch lead seal type casing patch packer type casing roller casing scraper contact 11410 spring cypress rd. Such initiative opened a window of opportunities to recover the desired gas production and to continue with planned development phase of the field without jeopardizing the integrity of. Casing patch the casing patch is used to repair damaged tubing or casing strings. Saltel casing patch is made from high quality stainless steel and elastomer outer skin with a profiled sealing system. Scp is caused by gas migration from a highpressured subsurface formation through the leaking cement sheath in one of the wells casing annuli. Weatherfords inline casing spear is used to retrieve 9 58 to 20in. This newly engineered expandable casing patch with high pressure ratings is a. In some cases, such as in depleted wells nearing the end of viable production, a casing patch may be the only economic means of safely. Casing diagnostic test must be performed monitoring condition testing repeated pressure request denied immediately well previously on gas lift. An optimal amount of casing pressure is needed whenever a well is being drilling or when well workover operations are being carried out.