Well Remediation – BROWNFIELD PROJECT – AKASO 4

We bid for a brownfield project on well remediation and won. We set out and planned for the job, acquiring all necessary equipment that would be needed for the job. Due to the intensity of degradation that had happened to the well, the project was categorised into three phases: well securement, well integrity and well perforations. The entire project encompassed well head team, slickline team, e-line team, pumping team, structural team, marine team, security team and catering crew.

First milestone: Well Securement

After we had conducted a thorough survey to know the amount of work that needed to be done, we mobilised a wellhead team, slickline team, etc., to the field. At the field, we liaised with the client’s production team and had the well shut in and the pressure bled off. The wellhead team ascertained the XMT integrity while the slickline team rigged up their unit and carried out drift with GC (gauge cutter) to confirm that the wellbore was free.

they ran in hole and retrieved the WRSCSSV to the surface, rigged up yet again and retrieved PXN plug, and installed a new PXN plug on the well which was pressure-tested okay. Afterwards, a new WRSCSSV was installed, and pressure tested okay. Finally, at the surface, we ran in hole and installed BPV to have a triple barrier to finish up the short string.

We proceeded to the long string which had not been producing for a long time and was shut in. BPV was installed again. We broke out the tree cap, rigged up lubricator and attempted to retrieve the existing NRV but could not. We subsequently rigged down our lubricator and ran in Lead Impression Block (LIB) to take impression of what had impeded the operation since we could not make up our NRV running tool. Using the LIB, we ascertained the internal diameter (ID) of the existing NRV and saw that it was quite smaller than the original ID of the NRV. Through our ingenuity, we designed a special tool that enabled us to retrieve the NRV from the long string. We then made up a TWCV and ran in the hole and conducted the Xmas Tree Valve checks to ensure the integrity of the valves. The NRV was retrieved and the slickline crew retrieved the WRSCSSV, retrieved the PXN and installed a new PXN plug and, afterwards, ran in a new WRSCSSV (wireline retrievable subsurface safety valve).

The three barriers were successfully established to ensure that the well was secured, and no hydrocarbon was leaking to the surface. We proceeded to the annulus valves, checked them, installed a VR plug to make sure there was no pressure or gas coming out from the annulus valve. We secured the annulus valve, nippled down the 3” XMT and installed 3” abandonment flange with a 3-1/2″ MGV + 1/2″ KTV + Pressure Gauge stop to monitor pressure. We rigged down the flowline.

Second milestone: Well integrity remediation

For the well integrity remediation, we mobilised structural team, well integrity team, piling team and casing integrity team. Once we got to the field, we signed a permit for hot work. We commenced a massive hot work on the platform to decommission the platform. Afterwards, we commenced installation of a new platform prefabricated at our base in town. We positioned the piling machine and drove in 4 platform pillars with it to the point of refusal. We filled the four pillars with cement mixtures to prevent corrosion. The structural team were able to install the new platform.

After installing it, we chipped out the cement that was between the 26’ conductor pipe and the collapsed 13’3-8 casing. We cold-cut a section of the 26” conductor pipe, beveled it to enable the installation of Gussets, hydro-blasted it and installed composite wrap on the collapsed 13’ 3/8 casing to restore the integrity of the casing. The composite wrap was left for some time to dry. Then, we installed 26” split pipe on the existing 26” conductor pipe and installed a gusset that was fabricated at our base. and welded them together.

The weight of the wellhead was transferred to the gusset situated atop the 26” casing. *This gave the new platform triple support to prevent it from bending. * A mud engineer finally mixed the G-class cement, ascertained the mud balance and dumped the cement inside the section of 26’ casing/gusset filled to the brim. After correcting the bend on the collapsed 13’ 3/8 casing, the well’s integrity was restored, and the structural and piling teams were demobilised.

3rd Milestone: Perforation

After refurbishing the XMT at Kenyon base, it was sent to the field. The abandonment flange that was installed on the well was nippled down for the refurbished XMT to be re-installed.

The wellhead team retrieved the NRV that was set on the long string, and then the slickline crew went ahead to retrieve the WRSCSSV, and eventually retrieve the PXN. The e-line team rigged up their unit and caried out a drift on the long string to ensure the wellbore was clear, and a subsequent C/O log was carried out to analyse the reservoir for crude content. Once that was done, we ran in and set a magna range plug, then dumped few feet of cement on top of the magna range plug, let it cure before we eventually made up the perforation gun and perforated the tubing.

As we observed crude on the surface, we then shut in the well and installed CCU. We went ahead to retrieve the NRV on the short string, shut in the well and installed antitheft to secure the XMT and the valves. Once this was completed, we handed the well over to our customer and demobilised from site.

Choke Valve Replacement

The choke valve being one of the valves that make up the Christmas tree plays a sensitive role during production. In upstream oil and gas industry, choke valves are used wherever there is a requirement for wellhead flow and pressure control. That is, it is used to regulate the flow of fluid to keep pressure under control. Operators are constantly monitoring the production system, and hardly do they ever open the choke valve fully because the level to which the valve is opened will determine the life of the well. This highlights the need for careful control of the flow of the well fluids to avoid any production well formation damage. A client contacted us when their wellhead adjustable choke became faulty and was affecting their production. We removed the old choke and successfully installed a new one. After the replacement of the choke valve, our client was able to optimize production.At Kenyon, our desire is to see our clients achieve their set goals within the speculated time and maximize production.We are Kenyon!

WELL ARREST

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Solving wellhead vandalized cases by Kenyon International
Wellhead vandalism is one of the major problems Niger Delta region faces due to the volatility of the area. Rising cases of wellhead vandalism has significantly affected Nigeria’s and oil companies’ sources of revenue in the region.

The Alakiri and Olubiri wells suffered severe vandalism. They were both wrecked by miscreants who stole the Bonnet and gate valves from these wells, leaving the wells’ integrities compromised and rendering the sites highly unsafe as hydrocarbon keeps gushing uncontrollably at high pressure. These attacks on wellheads by vandals have huge devastating environmental effects.
We received a distress call from our client to arrest the situation at the two locations (Alakiri ad Olubiri), swiftly, we swung into action. We fixed the damaged wellheads, installed the Bonnet and Gate Valves locked with anti-theft nuts, and the wellheads were restored to normal.

We at Kenyon have pledged to remain at the forefront in the oil and gas servicing industry, providing unprecedented services to our clients, and solving all well-intervention-related problems.

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Conductor Pipe Inspection

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We have conducted numerous Conductor Pipe Inspections and Re-threading for our reputable clients, using best practice. We have earned the trust of our clients to render such services without the fear of any mediocre from us.

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Conductor pipe inspection is a vital process that must be carried out to ensure that conductor pipes are still performing optimally. Conductor pipes protect shallow sand from being contaminated by drilling fluids and prevent washouts as well.

We have conducted numerous conductor pipe inspections and re-threading for our reputable clients using best industry practices. Such industry practices are what enabled us to earn the trust of our clients. We have rendered these services efficiently without our clients fearing quality compromise from our ends.

Tubing Hanger Body Seal Isolation & Tubing Hanger Void Fill Contingency

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Fluid leak
Fluid leak
Fixing the problem
Fixing the problem
gas leak
gas leak
Annulus leak
Annulus leak
Previous Next Kenyon proposed that MS-Sealant 04 be deployed between the Tubing Hanger Main Body Seals. The sealant would be injected via the GSP type “Port In” and “Port Out” allowing an even and full fill. This would prevent any potential pressure from passing the Tubing Hanger Main Body Seals isolating the Hanger Void from A-Ann pressure. Kenyon also proposed a contingency method should the initial isolation fail. This isolation would be a full Void fill utilising “Port In” and “Port Out” facility. Kenyon proposed that MS-Sealant 04 be deployed between the Tubing Hanger Main Body Seals. The sealant would be injected via the GSP type “Port In” and “Port Out” allowing an even and full fill. This would prevent any potential pressure from passing the Tubing Hanger Main Body Seals isolating the Hanger Void from A-Ann pressure. Kenyon also proposed a contingency method should the initial isolation fail. This isolation would be a full Void fill utilising “Port In” and “Port Out” facility.

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With full Integrity
With full Integrity
Solution achieved
Solution achieved
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Held Pressur
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Cured
Previous Next Escape of pressure poses as a challenge for most oil and gas assets. This doesn’t only result to a downtime but acquires more cost. From our experience, the best way to tackle pressure leakages, or sealing specific parts of the assets, adequate sealants must be used. Having been called for this job, we proposed MS-Sealant 04 and further deployed it between the tubing hanger main body seals. The sealant was injected via the GSP type “Port In” and “Port Out” allowing an even and full fill. The aim of this is to prevent any potential pressure from passing the tubing manger Main Body Seals isolating the Hanger Void from A-Ann pressure. We also proposed a contingency method in case the initial isolation fail. This isolation would be a full void fill utilising “Port In” and “Port Out” facility. At Kenyon, optimum job performance is the goal. We leverage the best technologies and get the job done seamlessly.