01
Key partnerships
Equipment supply partnerships established on technical qualification with major mining enterprises including Zijin Mining, China Coal Group, Shenhua Group, Shandong Gold and NFC.
Track record
Numbers from wells that have already been drilled.
Rate of penetration against offset baselines, sand ratios and pump rates from named wells, and the mining groups that have taken delivery. Fifteen years of it, and the standard we hold ourselves to in Indonesia.
These are our results. The work was executed out of our Chengdu engineering base, and the same teams, designs and methods are what PT DHK brings to an Indonesian well. We list the wells and the operators by name so the numbers can be checked rather than taken on trust.
Drilling and wellbore surveying
What the bits did, in wells with names.
Rate of penetration measured against offset well baselines on the same programme, not against a theoretical figure.
01 · Premium PDC bits
In the Yunyongye-1 well, micro coring PDC bits were run through limestone interbedded with chert nodules and increased the rate of penetration by four to five times. In the salt and gypsum sections, eccentric PDC designs held off borehole convergence and raised ROP by 109%.
In wells Ning 209H4-2 and Ning 209H20-5, the deployed bits came in 47.8% to 50.9% above the offset well baselines, cutting total drilling time on the section.
| Well or section | Formation | Bit design | Result |
|---|---|---|---|
| Yunyongye-1 | Limestone interbedded with chert nodules | Micro coring PDC | 4–5× ROP |
| Yunyongye-1 | Salt and gypsum section | Eccentric PDC | +109% ROP |
| Ning 209H4-2 | Offset well comparison | Application specific PDC | +47.8–50.9% ROP |
| Ning 209H20-5 | Offset well comparison | Application specific PDC | +47.8–50.9% ROP |
02 · Continuous gyroscopic surveying
The proprietary integrated continuous gyro delivers wellbore positioning accuracy equivalent to the international Keeper class systems.
It is the only service in China qualified for offshore high precision continuous survey work. In 2024 it completed more than a dozen difficult offshore survey operations for CNOOC.
Application at scale
Sand control and stimulation across a thousand wells.
Commercialised in 2018 and deployed in more than a thousand well interventions since, holding sand control integrity and lifting post intervention production.
1,000+
Well interventions
Since commercialisation in 2018
63.00%
Peak sand ratio placed
Se 1-80, Sebei Gas Field
120 m³
Sand placed per well
Upper end of routine batch operations
Sebei Gas Field
Quaternary formations with an average argillaceous content of 36.9%, fine grain sizes and a standing tendency to produce sand. The conditions that make gravel packing difficult are the conditions this technology was built for.
Zhundong Oilfield
Brownfield stimulation campaigns that returned declining wells to commercial flow, including two wells brought back to sustained daily oil production after intervention.
| Well | Pump rate | Peak treating pressure | Sand placed | Sand ratio |
|---|---|---|---|---|
| Tai H1-5 (horizontal) | 4.60 m³/min | 28.96 MPa | 100 m³ | 38.39% avg |
| Se 1-80 | 3.40 m³/min | — | — | 63.00% peak, 44.38% avg |
| Se 1-13 | — | — | 100–120 m³ | 57.03% avg |
| Se 1-8 | — | — | 100–120 m³ | 54.34% avg |
| Se 0-6 | — | — | 100–120 m³ | Routine batch |
| Well | Max pump pressure | Average sand ratio | Post stimulation production |
|---|---|---|---|
| BD4333 | 42 MPa | 34% | 6–7 t/day, natural flow |
| BD4357 | 32 MPa | 30% | 5–6 t/day, then 6–7 t/day on lift |
Mining equipment and engineering
Supplied into mines that do not accept a first attempt.
Equipment supply relationships built on technical qualification with some of the largest mining groups in China, plus export projects run to an international specification.
02
Project deployments
Shaft equipment customised, manufactured and exported for the Aurora Gold Mine in Guyana. FRP ladderway systems and core shaft equipment delivered for ten million tonne capacity projects, including the Shenhua Buertai Coal Mine and the Shaanxi Coal Binchang mining area.
03
Field applications
FBE and polyurea composite anti corrosion equipment for China Coal and Shandong Gold, holding up in highly corrosive environments. High strength rock bolts and flame retardant anti static grilles for Laiwu Steel Group and NFC, under strict safety compliance in complex geology.
Clients and counterparties
Who the equipment was built for.
Mining groups, coal producers and steel groups that have taken delivery of our equipment, or contracted our engineering and construction work.
Named counterparties: Zijin Mining · China Coal Group · Shenhua Group · Shandong Gold · NFC · China Railway · Baotou Steel · Laiwu Steel Group · CNOOC (offshore surveying)
Contracts and owned assets
State owned contracts, and mines held on our own balance sheet.
- National level state owned enterprisesEngineering and construction contracts executed for major state owned enterprises, including China Coal, China Railway and Baotou Steel.
- Diversified mining asset operationsThree lead zinc mines, one large scale stone mine and one gold mine operated in China, which is where the experience of running an asset rather than servicing one comes from.
3
Lead zinc mines
Operated in China
1
Gold mine
Operated in China
1
Large scale stone mine
Operated in China
10 Mt/y
Project capacity supplied
Buertai and Binchang coal projects
Get in touch
Want the well files behind these numbers?
We can walk through the offset comparisons, the treatment reports and the survey data under an NDA.